-/************************************************************************/
-/*! \class RtAudio
- \brief Realtime audio i/o C++ classes.
-
- RtAudio provides a common API (Application Programming Interface)
- for realtime audio input/output across Linux (native ALSA, Jack,
- and OSS), Macintosh OS X (CoreAudio and Jack), and Windows
- (DirectSound and ASIO) operating systems.
-
- RtAudio WWW site: http://www.music.mcgill.ca/~gary/rtaudio/
-
- RtAudio: realtime audio i/o C++ classes
- Copyright (c) 2001-2011 Gary P. Scavone
-
- Permission is hereby granted, free of charge, to any person
- obtaining a copy of this software and associated documentation files
- (the "Software"), to deal in the Software without restriction,
- including without limitation the rights to use, copy, modify, merge,
- publish, distribute, sublicense, and/or sell copies of the Software,
- and to permit persons to whom the Software is furnished to do so,
- subject to the following conditions:
-
- The above copyright notice and this permission notice shall be
- included in all copies or substantial portions of the Software.
-
- Any person wishing to distribute modifications to the Software is
- asked to send the modifications to the original developer so that
- they can be incorporated into the canonical version. This is,
- however, not a binding provision of this license.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
- ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
- CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-*/
-/************************************************************************/
-
-// RtAudio: Version 4.0.8
-
-#include "RtAudio.h"
-#include <iostream>
-#include <cstdlib>
-#include <cstring>
-#include <climits>
-
-// Static variable definitions.
-const unsigned int RtApi::MAX_SAMPLE_RATES = 14;
-const unsigned int RtApi::SAMPLE_RATES[] = {
- 4000, 5512, 8000, 9600, 11025, 16000, 22050,
- 32000, 44100, 48000, 88200, 96000, 176400, 192000
-};
-
-#if defined(__WINDOWS_DS__) || defined(__WINDOWS_ASIO__)
- #define MUTEX_INITIALIZE(A) InitializeCriticalSection(A)
- #define MUTEX_DESTROY(A) DeleteCriticalSection(A)
- #define MUTEX_LOCK(A) EnterCriticalSection(A)
- #define MUTEX_UNLOCK(A) LeaveCriticalSection(A)
-#elif defined(__LINUX_ALSA__) || defined(__UNIX_JACK__) || defined(__LINUX_OSS__) || defined(__MACOSX_CORE__)
- // pthread API
- #define MUTEX_INITIALIZE(A) pthread_mutex_init(A, NULL)
- #define MUTEX_DESTROY(A) pthread_mutex_destroy(A)
- #define MUTEX_LOCK(A) pthread_mutex_lock(A)
- #define MUTEX_UNLOCK(A) pthread_mutex_unlock(A)
-#else
- #define MUTEX_INITIALIZE(A) abs(*A) // dummy definitions
- #define MUTEX_DESTROY(A) abs(*A) // dummy definitions
-#endif
-
-// *************************************************** //
-//
-// RtAudio definitions.
-//
-// *************************************************** //
-
-void RtAudio :: getCompiledApi( std::vector<RtAudio::Api> &apis ) throw()
-{
- apis.clear();
-
- // The order here will control the order of RtAudio's API search in
- // the constructor.
-#if defined(__UNIX_JACK__)
- apis.push_back( UNIX_JACK );
-#endif
-#if defined(__LINUX_ALSA__)
- apis.push_back( LINUX_ALSA );
-#endif
-#if defined(__LINUX_OSS__)
- apis.push_back( LINUX_OSS );
-#endif
-#if defined(__WINDOWS_ASIO__)
- apis.push_back( WINDOWS_ASIO );
-#endif
-#if defined(__WINDOWS_DS__)
- apis.push_back( WINDOWS_DS );
-#endif
-#if defined(__MACOSX_CORE__)
- apis.push_back( MACOSX_CORE );
-#endif
-#if defined(__RTAUDIO_DUMMY__)
- apis.push_back( RTAUDIO_DUMMY );
-#endif
-}
-
-void RtAudio :: openRtApi( RtAudio::Api api )
-{
-#if defined(__UNIX_JACK__)
- if ( api == UNIX_JACK )
- rtapi_ = new RtApiJack();
-#endif
-#if defined(__LINUX_ALSA__)
- if ( api == LINUX_ALSA )
- rtapi_ = new RtApiAlsa();
-#endif
-#if defined(__LINUX_OSS__)
- if ( api == LINUX_OSS )
- rtapi_ = new RtApiOss();
-#endif
-#if defined(__WINDOWS_ASIO__)
- if ( api == WINDOWS_ASIO )
- rtapi_ = new RtApiAsio();
-#endif
-#if defined(__WINDOWS_DS__)
- if ( api == WINDOWS_DS )
- rtapi_ = new RtApiDs();
-#endif
-#if defined(__MACOSX_CORE__)
- if ( api == MACOSX_CORE )
- rtapi_ = new RtApiCore();
-#endif
-#if defined(__RTAUDIO_DUMMY__)
- if ( api == RTAUDIO_DUMMY )
- rtapi_ = new RtApiDummy();
-#endif
-}
-
-RtAudio :: RtAudio( RtAudio::Api api ) throw()
-{
- rtapi_ = 0;
-
- if ( api != UNSPECIFIED ) {
- // Attempt to open the specified API.
- openRtApi( api );
- if ( rtapi_ ) return;
-
- // No compiled support for specified API value. Issue a debug
- // warning and continue as if no API was specified.
- std::cerr << "\nRtAudio: no compiled support for specified API argument!\n" << std::endl;
- }
-
- // Iterate through the compiled APIs and return as soon as we find
- // one with at least one device or we reach the end of the list.
- std::vector< RtAudio::Api > apis;
- getCompiledApi( apis );
- for ( unsigned int i=0; i<apis.size(); i++ ) {
- openRtApi( apis[i] );
- if ( rtapi_->getDeviceCount() ) break;
- }
-
- if ( rtapi_ ) return;
-
- // It should not be possible to get here because the preprocessor
- // definition __RTAUDIO_DUMMY__ is automatically defined if no
- // API-specific definitions are passed to the compiler. But just in
- // case something weird happens, we'll print out an error message.
- std::cerr << "\nRtAudio: no compiled API support found ... critical error!!\n\n";
-}
-
-RtAudio :: ~RtAudio() throw()
-{
- delete rtapi_;
-}
-
-void RtAudio :: openStream( RtAudio::StreamParameters *outputParameters,
- RtAudio::StreamParameters *inputParameters,
- RtAudioFormat format, unsigned int sampleRate,
- unsigned int *bufferFrames,
- RtAudioCallback callback, void *userData,
- RtAudio::StreamOptions *options )
-{
- return rtapi_->openStream( outputParameters, inputParameters, format,
- sampleRate, bufferFrames, callback,
- userData, options );
-}
-
-// *************************************************** //
-//
-// Public RtApi definitions (see end of file for
-// private or protected utility functions).
-//
-// *************************************************** //
-
-RtApi :: RtApi()
-{
- stream_.state = STREAM_CLOSED;
- stream_.mode = UNINITIALIZED;
- stream_.apiHandle = 0;
- stream_.userBuffer[0] = 0;
- stream_.userBuffer[1] = 0;
- MUTEX_INITIALIZE( &stream_.mutex );
- showWarnings_ = true;
-}
-
-RtApi :: ~RtApi()
-{
- MUTEX_DESTROY( &stream_.mutex );
-}
-
-void RtApi :: openStream( RtAudio::StreamParameters *oParams,
- RtAudio::StreamParameters *iParams,
- RtAudioFormat format, unsigned int sampleRate,
- unsigned int *bufferFrames,
- RtAudioCallback callback, void *userData,
- RtAudio::StreamOptions *options )
-{
- if ( stream_.state != STREAM_CLOSED ) {
- errorText_ = "RtApi::openStream: a stream is already open!";
- error( RtError::INVALID_USE );
- }
-
- if ( oParams && oParams->nChannels < 1 ) {
- errorText_ = "RtApi::openStream: a non-NULL output StreamParameters structure cannot have an nChannels value less than one.";
- error( RtError::INVALID_USE );
- }
-
- if ( iParams && iParams->nChannels < 1 ) {
- errorText_ = "RtApi::openStream: a non-NULL input StreamParameters structure cannot have an nChannels value less than one.";
- error( RtError::INVALID_USE );
- }
-
- if ( oParams == NULL && iParams == NULL ) {
- errorText_ = "RtApi::openStream: input and output StreamParameters structures are both NULL!";
- error( RtError::INVALID_USE );
- }
-
- if ( formatBytes(format) == 0 ) {
- errorText_ = "RtApi::openStream: 'format' parameter value is undefined.";
- error( RtError::INVALID_USE );
- }
-
- unsigned int nDevices = getDeviceCount();
- unsigned int oChannels = 0;
- if ( oParams ) {
- oChannels = oParams->nChannels;
- if ( oParams->deviceId >= nDevices ) {
- errorText_ = "RtApi::openStream: output device parameter value is invalid.";
- error( RtError::INVALID_USE );
- }
- }
-
- unsigned int iChannels = 0;
- if ( iParams ) {
- iChannels = iParams->nChannels;
- if ( iParams->deviceId >= nDevices ) {
- errorText_ = "RtApi::openStream: input device parameter value is invalid.";
- error( RtError::INVALID_USE );
- }
- }
-
- clearStreamInfo();
- bool result;
-
- if ( oChannels > 0 ) {
-
- result = probeDeviceOpen( oParams->deviceId, OUTPUT, oChannels, oParams->firstChannel,
- sampleRate, format, bufferFrames, options );
- if ( result == false ) error( RtError::SYSTEM_ERROR );
- }
-
- if ( iChannels > 0 ) {
-
- result = probeDeviceOpen( iParams->deviceId, INPUT, iChannels, iParams->firstChannel,
- sampleRate, format, bufferFrames, options );
- if ( result == false ) {
- if ( oChannels > 0 ) closeStream();
- error( RtError::SYSTEM_ERROR );
- }
- }
-
- stream_.callbackInfo.callback = (void *) callback;
- stream_.callbackInfo.userData = userData;
-
- if ( options ) options->numberOfBuffers = stream_.nBuffers;
- stream_.state = STREAM_STOPPED;
-}
-
-unsigned int RtApi :: getDefaultInputDevice( void )
-{
- // Should be implemented in subclasses if possible.
- return 0;
-}
-
-unsigned int RtApi :: getDefaultOutputDevice( void )
-{
- // Should be implemented in subclasses if possible.
- return 0;
-}
-
-void RtApi :: closeStream( void )
-{
- // MUST be implemented in subclasses!
- return;
-}
-
-bool RtApi :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
- unsigned int firstChannel, unsigned int sampleRate,
- RtAudioFormat format, unsigned int *bufferSize,
- RtAudio::StreamOptions *options )
-{
- // MUST be implemented in subclasses!
- return FAILURE;
-}
-
-void RtApi :: tickStreamTime( void )
-{
- // Subclasses that do not provide their own implementation of
- // getStreamTime should call this function once per buffer I/O to
- // provide basic stream time support.
-
- stream_.streamTime += ( stream_.bufferSize * 1.0 / stream_.sampleRate );
-
-#if defined( HAVE_GETTIMEOFDAY )
- gettimeofday( &stream_.lastTickTimestamp, NULL );
-#endif
-}
-
-long RtApi :: getStreamLatency( void )
-{
- verifyStream();
-
- long totalLatency = 0;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX )
- totalLatency = stream_.latency[0];
- if ( stream_.mode == INPUT || stream_.mode == DUPLEX )
- totalLatency += stream_.latency[1];
-
- return totalLatency;
-}
-
-double RtApi :: getStreamTime( void )
-{
- verifyStream();
-
-#if defined( HAVE_GETTIMEOFDAY )
- // Return a very accurate estimate of the stream time by
- // adding in the elapsed time since the last tick.
- struct timeval then;
- struct timeval now;
-
- if ( stream_.state != STREAM_RUNNING || stream_.streamTime == 0.0 )
- return stream_.streamTime;
-
- gettimeofday( &now, NULL );
- then = stream_.lastTickTimestamp;
- return stream_.streamTime +
- ((now.tv_sec + 0.000001 * now.tv_usec) -
- (then.tv_sec + 0.000001 * then.tv_usec));
-#else
- return stream_.streamTime;
-#endif
-}
-
-unsigned int RtApi :: getStreamSampleRate( void )
-{
- verifyStream();
-
- return stream_.sampleRate;
-}
-
-
-// *************************************************** //
-//
-// OS/API-specific methods.
-//
-// *************************************************** //
-
-#if defined(__MACOSX_CORE__)
-
-// The OS X CoreAudio API is designed to use a separate callback
-// procedure for each of its audio devices. A single RtAudio duplex
-// stream using two different devices is supported here, though it
-// cannot be guaranteed to always behave correctly because we cannot
-// synchronize these two callbacks.
-//
-// A property listener is installed for over/underrun information.
-// However, no functionality is currently provided to allow property
-// listeners to trigger user handlers because it is unclear what could
-// be done if a critical stream parameter (buffer size, sample rate,
-// device disconnect) notification arrived. The listeners entail
-// quite a bit of extra code and most likely, a user program wouldn't
-// be prepared for the result anyway. However, we do provide a flag
-// to the client callback function to inform of an over/underrun.
-//
-// The mechanism for querying and setting system parameters was
-// updated (and perhaps simplified) in OS-X version 10.4. However,
-// since 10.4 support is not necessarily available to all users, I've
-// decided not to update the respective code at this time. Perhaps
-// this will happen when Apple makes 10.4 free for everyone. :-)
-
-// A structure to hold various information related to the CoreAudio API
-// implementation.
-struct CoreHandle {
- AudioDeviceID id[2]; // device ids
-#if defined( MAC_OS_X_VERSION_10_5 ) && ( MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5 )
- AudioDeviceIOProcID procId[2];
-#endif
- UInt32 iStream[2]; // device stream index (or first if using multiple)
- UInt32 nStreams[2]; // number of streams to use
- bool xrun[2];
- char *deviceBuffer;
- pthread_cond_t condition;
- int drainCounter; // Tracks callback counts when draining
- bool internalDrain; // Indicates if stop is initiated from callback or not.
-
- CoreHandle()
- :deviceBuffer(0), drainCounter(0), internalDrain(false) { nStreams[0] = 1; nStreams[1] = 1; id[0] = 0; id[1] = 0; xrun[0] = false; xrun[1] = false; }
-};
-
-RtApiCore :: RtApiCore()
-{
- // Nothing to do here.
-}
-
-RtApiCore :: ~RtApiCore()
-{
- // The subclass destructor gets called before the base class
- // destructor, so close an existing stream before deallocating
- // apiDeviceId memory.
- if ( stream_.state != STREAM_CLOSED ) closeStream();
-}
-
-unsigned int RtApiCore :: getDeviceCount( void )
-{
- // Find out how many audio devices there are, if any.
- UInt32 dataSize;
- AudioObjectPropertyAddress propertyAddress = { kAudioHardwarePropertyDevices, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };
- OSStatus result = AudioObjectGetPropertyDataSize( kAudioObjectSystemObject, &propertyAddress, 0, NULL, &dataSize );
- if ( result != noErr ) {
- errorText_ = "RtApiCore::getDeviceCount: OS-X error getting device info!";
- error( RtError::WARNING );
- return 0;
- }
-
- return dataSize / sizeof( AudioDeviceID );
-}
-
-unsigned int RtApiCore :: getDefaultInputDevice( void )
-{
- unsigned int nDevices = getDeviceCount();
- if ( nDevices <= 1 ) return 0;
-
- AudioDeviceID id;
- UInt32 dataSize = sizeof( AudioDeviceID );
- AudioObjectPropertyAddress property = { kAudioHardwarePropertyDefaultInputDevice, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };
- OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, &id );
- if ( result != noErr ) {
- errorText_ = "RtApiCore::getDefaultInputDevice: OS-X system error getting device.";
- error( RtError::WARNING );
- return 0;
- }
-
- dataSize *= nDevices;
- AudioDeviceID deviceList[ nDevices ];
- property.mSelector = kAudioHardwarePropertyDevices;
- result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, (void *) &deviceList );
- if ( result != noErr ) {
- errorText_ = "RtApiCore::getDefaultInputDevice: OS-X system error getting device IDs.";
- error( RtError::WARNING );
- return 0;
- }
-
- for ( unsigned int i=0; i<nDevices; i++ )
- if ( id == deviceList[i] ) return i;
-
- errorText_ = "RtApiCore::getDefaultInputDevice: No default device found!";
- error( RtError::WARNING );
- return 0;
-}
-
-unsigned int RtApiCore :: getDefaultOutputDevice( void )
-{
- unsigned int nDevices = getDeviceCount();
- if ( nDevices <= 1 ) return 0;
-
- AudioDeviceID id;
- UInt32 dataSize = sizeof( AudioDeviceID );
- AudioObjectPropertyAddress property = { kAudioHardwarePropertyDefaultOutputDevice, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };
- OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, &id );
- if ( result != noErr ) {
- errorText_ = "RtApiCore::getDefaultOutputDevice: OS-X system error getting device.";
- error( RtError::WARNING );
- return 0;
- }
-
- dataSize = sizeof( AudioDeviceID ) * nDevices;
- AudioDeviceID deviceList[ nDevices ];
- property.mSelector = kAudioHardwarePropertyDevices;
- result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, (void *) &deviceList );
- if ( result != noErr ) {
- errorText_ = "RtApiCore::getDefaultOutputDevice: OS-X system error getting device IDs.";
- error( RtError::WARNING );
- return 0;
- }
-
- for ( unsigned int i=0; i<nDevices; i++ )
- if ( id == deviceList[i] ) return i;
-
- errorText_ = "RtApiCore::getDefaultOutputDevice: No default device found!";
- error( RtError::WARNING );
- return 0;
-}
-
-RtAudio::DeviceInfo RtApiCore :: getDeviceInfo( unsigned int device )
-{
- RtAudio::DeviceInfo info;
- info.probed = false;
-
- // Get device ID
- unsigned int nDevices = getDeviceCount();
- if ( nDevices == 0 ) {
- errorText_ = "RtApiCore::getDeviceInfo: no devices found!";
- error( RtError::INVALID_USE );
- }
-
- if ( device >= nDevices ) {
- errorText_ = "RtApiCore::getDeviceInfo: device ID is invalid!";
- error( RtError::INVALID_USE );
- }
-
- AudioDeviceID deviceList[ nDevices ];
- UInt32 dataSize = sizeof( AudioDeviceID ) * nDevices;
- AudioObjectPropertyAddress property = { kAudioHardwarePropertyDevices,
- kAudioObjectPropertyScopeGlobal,
- kAudioObjectPropertyElementMaster };
- OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property,
- 0, NULL, &dataSize, (void *) &deviceList );
- if ( result != noErr ) {
- errorText_ = "RtApiCore::getDeviceInfo: OS-X system error getting device IDs.";
- error( RtError::WARNING );
- return info;
- }
-
- AudioDeviceID id = deviceList[ device ];
-
- // Get the device name.
- info.name.erase();
- CFStringRef cfname;
- dataSize = sizeof( CFStringRef );
- property.mSelector = kAudioObjectPropertyManufacturer;
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &cfname );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceInfo: system error (" << getErrorCode( result ) << ") getting device manufacturer.";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- //const char *mname = CFStringGetCStringPtr( cfname, CFStringGetSystemEncoding() );
- int length = CFStringGetLength(cfname);
- char *mname = (char *)malloc(length * 3 + 1);
- CFStringGetCString(cfname, mname, length * 3 + 1, CFStringGetSystemEncoding());
- info.name.append( (const char *)mname, strlen(mname) );
- info.name.append( ": " );
- CFRelease( cfname );
- free(mname);
-
- property.mSelector = kAudioObjectPropertyName;
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &cfname );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceInfo: system error (" << getErrorCode( result ) << ") getting device name.";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- //const char *name = CFStringGetCStringPtr( cfname, CFStringGetSystemEncoding() );
- length = CFStringGetLength(cfname);
- char *name = (char *)malloc(length * 3 + 1);
- CFStringGetCString(cfname, name, length * 3 + 1, CFStringGetSystemEncoding());
- info.name.append( (const char *)name, strlen(name) );
- CFRelease( cfname );
- free(name);
-
- // Get the output stream "configuration".
- AudioBufferList *bufferList = nil;
- property.mSelector = kAudioDevicePropertyStreamConfiguration;
- property.mScope = kAudioDevicePropertyScopeOutput;
- // property.mElement = kAudioObjectPropertyElementWildcard;
- dataSize = 0;
- result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );
- if ( result != noErr || dataSize == 0 ) {
- errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting output stream configuration info for device (" << device << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Allocate the AudioBufferList.
- bufferList = (AudioBufferList *) malloc( dataSize );
- if ( bufferList == NULL ) {
- errorText_ = "RtApiCore::getDeviceInfo: memory error allocating output AudioBufferList.";
- error( RtError::WARNING );
- return info;
- }
-
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, bufferList );
- if ( result != noErr || dataSize == 0 ) {
- free( bufferList );
- errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting output stream configuration for device (" << device << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Get output channel information.
- unsigned int i, nStreams = bufferList->mNumberBuffers;
- for ( i=0; i<nStreams; i++ )
- info.outputChannels += bufferList->mBuffers[i].mNumberChannels;
- free( bufferList );
-
- // Get the input stream "configuration".
- property.mScope = kAudioDevicePropertyScopeInput;
- result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );
- if ( result != noErr || dataSize == 0 ) {
- errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting input stream configuration info for device (" << device << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Allocate the AudioBufferList.
- bufferList = (AudioBufferList *) malloc( dataSize );
- if ( bufferList == NULL ) {
- errorText_ = "RtApiCore::getDeviceInfo: memory error allocating input AudioBufferList.";
- error( RtError::WARNING );
- return info;
- }
-
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, bufferList );
- if (result != noErr || dataSize == 0) {
- free( bufferList );
- errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting input stream configuration for device (" << device << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Get input channel information.
- nStreams = bufferList->mNumberBuffers;
- for ( i=0; i<nStreams; i++ )
- info.inputChannels += bufferList->mBuffers[i].mNumberChannels;
- free( bufferList );
-
- // If device opens for both playback and capture, we determine the channels.
- if ( info.outputChannels > 0 && info.inputChannels > 0 )
- info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;
-
- // Probe the device sample rates.
- bool isInput = false;
- if ( info.outputChannels == 0 ) isInput = true;
-
- // Determine the supported sample rates.
- property.mSelector = kAudioDevicePropertyAvailableNominalSampleRates;
- if ( isInput == false ) property.mScope = kAudioDevicePropertyScopeOutput;
- result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );
- if ( result != kAudioHardwareNoError || dataSize == 0 ) {
- errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting sample rate info.";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- UInt32 nRanges = dataSize / sizeof( AudioValueRange );
- AudioValueRange rangeList[ nRanges ];
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &rangeList );
- if ( result != kAudioHardwareNoError ) {
- errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting sample rates.";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- Float64 minimumRate = 100000000.0, maximumRate = 0.0;
- for ( UInt32 i=0; i<nRanges; i++ ) {
- if ( rangeList[i].mMinimum < minimumRate ) minimumRate = rangeList[i].mMinimum;
- if ( rangeList[i].mMaximum > maximumRate ) maximumRate = rangeList[i].mMaximum;
- }
-
- info.sampleRates.clear();
- for ( unsigned int k=0; k<MAX_SAMPLE_RATES; k++ ) {
- if ( SAMPLE_RATES[k] >= (unsigned int) minimumRate && SAMPLE_RATES[k] <= (unsigned int) maximumRate )
- info.sampleRates.push_back( SAMPLE_RATES[k] );
- }
-
- if ( info.sampleRates.size() == 0 ) {
- errorStream_ << "RtApiCore::probeDeviceInfo: No supported sample rates found for device (" << device << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // CoreAudio always uses 32-bit floating point data for PCM streams.
- // Thus, any other "physical" formats supported by the device are of
- // no interest to the client.
- info.nativeFormats = RTAUDIO_FLOAT32;
-
- if ( info.outputChannels > 0 )
- if ( getDefaultOutputDevice() == device ) info.isDefaultOutput = true;
- if ( info.inputChannels > 0 )
- if ( getDefaultInputDevice() == device ) info.isDefaultInput = true;
-
- info.probed = true;
- return info;
-}
-
-OSStatus callbackHandler( AudioDeviceID inDevice,
- const AudioTimeStamp* inNow,
- const AudioBufferList* inInputData,
- const AudioTimeStamp* inInputTime,
- AudioBufferList* outOutputData,
- const AudioTimeStamp* inOutputTime,
- void* infoPointer )
-{
- CallbackInfo *info = (CallbackInfo *) infoPointer;
-
- RtApiCore *object = (RtApiCore *) info->object;
- if ( object->callbackEvent( inDevice, inInputData, outOutputData ) == false )
- return kAudioHardwareUnspecifiedError;
- else
- return kAudioHardwareNoError;
-}
-
-OSStatus deviceListener( AudioObjectID inDevice,
- UInt32 nAddresses,
- const AudioObjectPropertyAddress properties[],
- void* handlePointer )
-{
- CoreHandle *handle = (CoreHandle *) handlePointer;
- for ( UInt32 i=0; i<nAddresses; i++ ) {
- if ( properties[i].mSelector == kAudioDeviceProcessorOverload ) {
- if ( properties[i].mScope == kAudioDevicePropertyScopeInput )
- handle->xrun[1] = true;
- else
- handle->xrun[0] = true;
- }
- }
-
- return kAudioHardwareNoError;
-}
-
-bool RtApiCore :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
- unsigned int firstChannel, unsigned int sampleRate,
- RtAudioFormat format, unsigned int *bufferSize,
- RtAudio::StreamOptions *options )
-{
- // Get device ID
- unsigned int nDevices = getDeviceCount();
- if ( nDevices == 0 ) {
- // This should not happen because a check is made before this function is called.
- errorText_ = "RtApiCore::probeDeviceOpen: no devices found!";
- return FAILURE;
- }
-
- if ( device >= nDevices ) {
- // This should not happen because a check is made before this function is called.
- errorText_ = "RtApiCore::probeDeviceOpen: device ID is invalid!";
- return FAILURE;
- }
-
- AudioDeviceID deviceList[ nDevices ];
- UInt32 dataSize = sizeof( AudioDeviceID ) * nDevices;
- AudioObjectPropertyAddress property = { kAudioHardwarePropertyDevices,
- kAudioObjectPropertyScopeGlobal,
- kAudioObjectPropertyElementMaster };
- OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property,
- 0, NULL, &dataSize, (void *) &deviceList );
- if ( result != noErr ) {
- errorText_ = "RtApiCore::probeDeviceOpen: OS-X system error getting device IDs.";
- return FAILURE;
- }
-
- AudioDeviceID id = deviceList[ device ];
-
- // Setup for stream mode.
- bool isInput = false;
- if ( mode == INPUT ) {
- isInput = true;
- property.mScope = kAudioDevicePropertyScopeInput;
- }
- else
- property.mScope = kAudioDevicePropertyScopeOutput;
-
- // Get the stream "configuration".
- AudioBufferList *bufferList = nil;
- dataSize = 0;
- property.mSelector = kAudioDevicePropertyStreamConfiguration;
- result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );
- if ( result != noErr || dataSize == 0 ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream configuration info for device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Allocate the AudioBufferList.
- bufferList = (AudioBufferList *) malloc( dataSize );
- if ( bufferList == NULL ) {
- errorText_ = "RtApiCore::probeDeviceOpen: memory error allocating AudioBufferList.";
- return FAILURE;
- }
-
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, bufferList );
- if (result != noErr || dataSize == 0) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream configuration for device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Search for one or more streams that contain the desired number of
- // channels. CoreAudio devices can have an arbitrary number of
- // streams and each stream can have an arbitrary number of channels.
- // For each stream, a single buffer of interleaved samples is
- // provided. RtAudio prefers the use of one stream of interleaved
- // data or multiple consecutive single-channel streams. However, we
- // now support multiple consecutive multi-channel streams of
- // interleaved data as well.
- UInt32 iStream, offsetCounter = firstChannel;
- UInt32 nStreams = bufferList->mNumberBuffers;
- bool monoMode = false;
- bool foundStream = false;
-
- // First check that the device supports the requested number of
- // channels.
- UInt32 deviceChannels = 0;
- for ( iStream=0; iStream<nStreams; iStream++ )
- deviceChannels += bufferList->mBuffers[iStream].mNumberChannels;
-
- if ( deviceChannels < ( channels + firstChannel ) ) {
- free( bufferList );
- errorStream_ << "RtApiCore::probeDeviceOpen: the device (" << device << ") does not support the requested channel count.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Look for a single stream meeting our needs.
- UInt32 firstStream, streamCount = 1, streamChannels = 0, channelOffset = 0;
- for ( iStream=0; iStream<nStreams; iStream++ ) {
- streamChannels = bufferList->mBuffers[iStream].mNumberChannels;
- if ( streamChannels >= channels + offsetCounter ) {
- firstStream = iStream;
- channelOffset = offsetCounter;
- foundStream = true;
- break;
- }
- if ( streamChannels > offsetCounter ) break;
- offsetCounter -= streamChannels;
- }
-
- // If we didn't find a single stream above, then we should be able
- // to meet the channel specification with multiple streams.
- if ( foundStream == false ) {
- monoMode = true;
- offsetCounter = firstChannel;
- for ( iStream=0; iStream<nStreams; iStream++ ) {
- streamChannels = bufferList->mBuffers[iStream].mNumberChannels;
- if ( streamChannels > offsetCounter ) break;
- offsetCounter -= streamChannels;
- }
-
- firstStream = iStream;
- channelOffset = offsetCounter;
- Int32 channelCounter = channels + offsetCounter - streamChannels;
-
- if ( streamChannels > 1 ) monoMode = false;
- while ( channelCounter > 0 ) {
- streamChannels = bufferList->mBuffers[++iStream].mNumberChannels;
- if ( streamChannels > 1 ) monoMode = false;
- channelCounter -= streamChannels;
- streamCount++;
- }
- }
-
- free( bufferList );
-
- // Determine the buffer size.
- AudioValueRange bufferRange;
- dataSize = sizeof( AudioValueRange );
- property.mSelector = kAudioDevicePropertyBufferFrameSizeRange;
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &bufferRange );
-
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting buffer size range for device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- if ( bufferRange.mMinimum > *bufferSize ) *bufferSize = (unsigned long) bufferRange.mMinimum;
- else if ( bufferRange.mMaximum < *bufferSize ) *bufferSize = (unsigned long) bufferRange.mMaximum;
- if ( options && options->flags & RTAUDIO_MINIMIZE_LATENCY ) *bufferSize = (unsigned long) bufferRange.mMinimum;
-
- // Set the buffer size. For multiple streams, I'm assuming we only
- // need to make this setting for the master channel.
- UInt32 theSize = (UInt32) *bufferSize;
- dataSize = sizeof( UInt32 );
- property.mSelector = kAudioDevicePropertyBufferFrameSize;
- result = AudioObjectSetPropertyData( id, &property, 0, NULL, dataSize, &theSize );
-
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") setting the buffer size for device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // If attempting to setup a duplex stream, the bufferSize parameter
- // MUST be the same in both directions!
- *bufferSize = theSize;
- if ( stream_.mode == OUTPUT && mode == INPUT && *bufferSize != stream_.bufferSize ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error setting buffer size for duplex stream on device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- stream_.bufferSize = *bufferSize;
- stream_.nBuffers = 1;
-
- // Check and if necessary, change the sample rate for the device.
- Float64 nominalRate;
- dataSize = sizeof( Float64 );
- property.mSelector = kAudioDevicePropertyNominalSampleRate;
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &nominalRate );
-
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting current sample rate.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Only change the sample rate if off by more than 1 Hz.
- if ( fabs( nominalRate - (double)sampleRate ) > 1.0 ) {
- nominalRate = (Float64) sampleRate;
- result = AudioObjectSetPropertyData( id, &property, 0, NULL, dataSize, &nominalRate );
-
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") setting sample rate for device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
-
- // Try to set "hog" mode ... it's not clear to me this is working.
- if ( options && options->flags & RTAUDIO_HOG_DEVICE ) {
- pid_t hog_pid;
- dataSize = sizeof( hog_pid );
- property.mSelector = kAudioDevicePropertyHogMode;
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &hog_pid );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting 'hog' state!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- if ( hog_pid != getpid() ) {
- hog_pid = getpid();
- result = AudioObjectSetPropertyData( id, &property, 0, NULL, dataSize, &hog_pid );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") setting 'hog' state!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
- }
-
- // Get the stream ID(s) so we can set the stream format.
- AudioStreamID streamIDs[ nStreams ];
- dataSize = nStreams * sizeof( AudioStreamID );
- property.mSelector = kAudioDevicePropertyStreams;
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &streamIDs );
-
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream ID(s) for device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Now set the stream format for each stream. Also, check the
- // physical format of the device and change that if necessary.
- AudioStreamBasicDescription description;
- dataSize = sizeof( AudioStreamBasicDescription );
-
- bool updateFormat;
- for ( UInt32 i=0; i<streamCount; i++ ) {
-
- property.mSelector = kAudioStreamPropertyVirtualFormat;
- result = AudioObjectGetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, &dataSize, &description );
-
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream format for device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Set the sample rate and data format id. However, only make the
- // change if the sample rate is not within 1.0 of the desired
- // rate and the format is not linear pcm.
- updateFormat = false;
- if ( fabs( description.mSampleRate - (double)sampleRate ) > 1.0 ) {
- description.mSampleRate = (double) sampleRate;
- updateFormat = true;
- }
-
- if ( description.mFormatID != kAudioFormatLinearPCM ) {
- description.mFormatID = kAudioFormatLinearPCM;
- updateFormat = true;
- }
-
- if ( updateFormat ) {
- result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &description );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") setting sample rate or data format for device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
-
- // Now check the physical format.
- property.mSelector = kAudioStreamPropertyPhysicalFormat;
- result = AudioObjectGetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, &dataSize, &description );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream physical format for device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- if ( description.mFormatID != kAudioFormatLinearPCM || description.mBitsPerChannel < 24 ) {
- description.mFormatID = kAudioFormatLinearPCM;
- AudioStreamBasicDescription testDescription = description;
- unsigned long formatFlags;
-
- // We'll try higher bit rates first and then work our way down.
- testDescription.mBitsPerChannel = 32;
- testDescription.mBytesPerFrame = testDescription.mBitsPerChannel/8 * testDescription.mChannelsPerFrame;
- testDescription.mBytesPerPacket = testDescription.mBytesPerFrame * testDescription.mFramesPerPacket;
- formatFlags = description.mFormatFlags | kLinearPCMFormatFlagIsFloat & ~kLinearPCMFormatFlagIsSignedInteger;
- testDescription.mFormatFlags = formatFlags;
- result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &testDescription );
- if ( result == noErr ) continue;
-
- testDescription = description;
- testDescription.mBitsPerChannel = 32;
- testDescription.mBytesPerFrame = testDescription.mBitsPerChannel/8 * testDescription.mChannelsPerFrame;
- testDescription.mBytesPerPacket = testDescription.mBytesPerFrame * testDescription.mFramesPerPacket;
- formatFlags = (description.mFormatFlags | kLinearPCMFormatFlagIsSignedInteger) & ~kLinearPCMFormatFlagIsFloat;
- testDescription.mFormatFlags = formatFlags;
- result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &testDescription );
- if ( result == noErr ) continue;
-
- testDescription = description;
- testDescription.mBitsPerChannel = 24;
- testDescription.mBytesPerFrame = testDescription.mBitsPerChannel/8 * testDescription.mChannelsPerFrame;
- testDescription.mBytesPerPacket = testDescription.mBytesPerFrame * testDescription.mFramesPerPacket;
- testDescription.mFormatFlags = formatFlags;
- result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &testDescription );
- if ( result == noErr ) continue;
-
- testDescription = description;
- testDescription.mBitsPerChannel = 16;
- testDescription.mBytesPerFrame = testDescription.mBitsPerChannel/8 * testDescription.mChannelsPerFrame;
- testDescription.mBytesPerPacket = testDescription.mBytesPerFrame * testDescription.mFramesPerPacket;
- testDescription.mFormatFlags = formatFlags;
- result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &testDescription );
- if ( result == noErr ) continue;
-
- testDescription = description;
- testDescription.mBitsPerChannel = 8;
- testDescription.mBytesPerFrame = testDescription.mBitsPerChannel/8 * testDescription.mChannelsPerFrame;
- testDescription.mBytesPerPacket = testDescription.mBytesPerFrame * testDescription.mFramesPerPacket;
- testDescription.mFormatFlags = formatFlags;
- result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &testDescription );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") setting physical data format for device (" << device << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
- }
-
-
- // Get the stream latency. There can be latency in both the device
- // and the stream. First, attempt to get the device latency on the
- // master channel or the first open channel. Errors that might
- // occur here are not deemed critical.
-
- UInt32 latency;
- dataSize = sizeof( UInt32 );
- property.mSelector = kAudioDevicePropertyLatency;
- if ( AudioObjectHasProperty( id, &property ) == true ) {
- result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &latency );
- if ( result == kAudioHardwareNoError ) stream_.latency[ mode ] = latency;
- else {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting device latency for device (" << device << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- }
- }
-
- // Now try to get the stream latency. For multiple streams, I assume the
- // latency is equal for each.
- result = AudioObjectGetPropertyData( streamIDs[firstStream], &property, 0, NULL, &dataSize, &latency );
- if ( result == kAudioHardwareNoError ) stream_.latency[ mode ] += latency;
- else {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream latency for device (" << device << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- }
-
- // Byte-swapping: According to AudioHardware.h, the stream data will
- // always be presented in native-endian format, so we should never
- // need to byte swap.
- stream_.doByteSwap[mode] = false;
-
- // From the CoreAudio documentation, PCM data must be supplied as
- // 32-bit floats.
- stream_.userFormat = format;
- stream_.deviceFormat[mode] = RTAUDIO_FLOAT32;
-
- if ( streamCount == 1 )
- stream_.nDeviceChannels[mode] = description.mChannelsPerFrame;
- else // multiple streams
- stream_.nDeviceChannels[mode] = channels;
- stream_.nUserChannels[mode] = channels;
- stream_.channelOffset[mode] = channelOffset; // offset within a CoreAudio stream
- if ( options && options->flags & RTAUDIO_NONINTERLEAVED ) stream_.userInterleaved = false;
- else stream_.userInterleaved = true;
- stream_.deviceInterleaved[mode] = true;
- if ( monoMode == true ) stream_.deviceInterleaved[mode] = false;
-
- // Set flags for buffer conversion.
- stream_.doConvertBuffer[mode] = false;
- if ( stream_.userFormat != stream_.deviceFormat[mode] )
- stream_.doConvertBuffer[mode] = true;
- if ( stream_.nUserChannels[mode] < stream_.nDeviceChannels[mode] )
- stream_.doConvertBuffer[mode] = true;
- if ( streamCount == 1 ) {
- if ( stream_.nUserChannels[mode] > 1 &&
- stream_.userInterleaved != stream_.deviceInterleaved[mode] )
- stream_.doConvertBuffer[mode] = true;
- }
- else if ( monoMode && stream_.userInterleaved )
- stream_.doConvertBuffer[mode] = true;
-
- // Allocate our CoreHandle structure for the stream.
- CoreHandle *handle = 0;
- if ( stream_.apiHandle == 0 ) {
- try {
- handle = new CoreHandle;
- }
- catch ( std::bad_alloc& ) {
- errorText_ = "RtApiCore::probeDeviceOpen: error allocating CoreHandle memory.";
- goto error;
- }
-
- if ( pthread_cond_init( &handle->condition, NULL ) ) {
- errorText_ = "RtApiCore::probeDeviceOpen: error initializing pthread condition variable.";
- goto error;
- }
- stream_.apiHandle = (void *) handle;
- }
- else
- handle = (CoreHandle *) stream_.apiHandle;
- handle->iStream[mode] = firstStream;
- handle->nStreams[mode] = streamCount;
- handle->id[mode] = id;
-
- // Allocate necessary internal buffers.
- unsigned long bufferBytes;
- bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );
- stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );
- if ( stream_.userBuffer[mode] == NULL ) {
- errorText_ = "RtApiCore::probeDeviceOpen: error allocating user buffer memory.";
- goto error;
- }
-
- // If possible, we will make use of the CoreAudio stream buffers as
- // "device buffers". However, we can't do this if using multiple
- // streams.
- if ( stream_.doConvertBuffer[mode] && handle->nStreams[mode] > 1 ) {
-
- bool makeBuffer = true;
- bufferBytes = stream_.nDeviceChannels[mode] * formatBytes( stream_.deviceFormat[mode] );
- if ( mode == INPUT ) {
- if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {
- unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );
- if ( bufferBytes <= bytesOut ) makeBuffer = false;
- }
- }
-
- if ( makeBuffer ) {
- bufferBytes *= *bufferSize;
- if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );
- stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );
- if ( stream_.deviceBuffer == NULL ) {
- errorText_ = "RtApiCore::probeDeviceOpen: error allocating device buffer memory.";
- goto error;
- }
- }
- }
-
- stream_.sampleRate = sampleRate;
- stream_.device[mode] = device;
- stream_.state = STREAM_STOPPED;
- stream_.callbackInfo.object = (void *) this;
-
- // Setup the buffer conversion information structure.
- if ( stream_.doConvertBuffer[mode] ) {
- if ( streamCount > 1 ) setConvertInfo( mode, 0 );
- else setConvertInfo( mode, channelOffset );
- }
-
- if ( mode == INPUT && stream_.mode == OUTPUT && stream_.device[0] == device )
- // Only one callback procedure per device.
- stream_.mode = DUPLEX;
- else {
-#if defined( MAC_OS_X_VERSION_10_5 ) && ( MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5 )
- result = AudioDeviceCreateIOProcID( id, callbackHandler, (void *) &stream_.callbackInfo, &handle->procId[mode] );
-#else
- // deprecated in favor of AudioDeviceCreateIOProcID()
- result = AudioDeviceAddIOProc( id, callbackHandler, (void *) &stream_.callbackInfo );
-#endif
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::probeDeviceOpen: system error setting callback for device (" << device << ").";
- errorText_ = errorStream_.str();
- goto error;
- }
- if ( stream_.mode == OUTPUT && mode == INPUT )
- stream_.mode = DUPLEX;
- else
- stream_.mode = mode;
- }
-
- // Setup the device property listener for over/underload.
- property.mSelector = kAudioDeviceProcessorOverload;
- result = AudioObjectAddPropertyListener( id, &property, deviceListener, (void *) handle );
-
- return SUCCESS;
-
- error:
- if ( handle ) {
- pthread_cond_destroy( &handle->condition );
- delete handle;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- return FAILURE;
-}
-
-void RtApiCore :: closeStream( void )
-{
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiCore::closeStream(): no open stream to close!";
- error( RtError::WARNING );
- return;
- }
-
- CoreHandle *handle = (CoreHandle *) stream_.apiHandle;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
- if ( stream_.state == STREAM_RUNNING )
- AudioDeviceStop( handle->id[0], callbackHandler );
-#if defined( MAC_OS_X_VERSION_10_5 ) && ( MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5 )
- AudioDeviceDestroyIOProcID( handle->id[0], handle->procId[0] );
-#else
- // deprecated in favor of AudioDeviceDestroyIOProcID()
- AudioDeviceRemoveIOProc( handle->id[0], callbackHandler );
-#endif
- }
-
- if ( stream_.mode == INPUT || ( stream_.mode == DUPLEX && stream_.device[0] != stream_.device[1] ) ) {
- if ( stream_.state == STREAM_RUNNING )
- AudioDeviceStop( handle->id[1], callbackHandler );
-#if defined( MAC_OS_X_VERSION_10_5 ) && ( MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5 )
- AudioDeviceDestroyIOProcID( handle->id[1], handle->procId[1] );
-#else
- // deprecated in favor of AudioDeviceDestroyIOProcID()
- AudioDeviceRemoveIOProc( handle->id[1], callbackHandler );
-#endif
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- // Destroy pthread condition variable.
- pthread_cond_destroy( &handle->condition );
- delete handle;
- stream_.apiHandle = 0;
-
- stream_.mode = UNINITIALIZED;
- stream_.state = STREAM_CLOSED;
-}
-
-void RtApiCore :: startStream( void )
-{
- verifyStream();
- if ( stream_.state == STREAM_RUNNING ) {
- errorText_ = "RtApiCore::startStream(): the stream is already running!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- OSStatus result = noErr;
- CoreHandle *handle = (CoreHandle *) stream_.apiHandle;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
-
- result = AudioDeviceStart( handle->id[0], callbackHandler );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::startStream: system error (" << getErrorCode( result ) << ") starting callback procedure on device (" << stream_.device[0] << ").";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- if ( stream_.mode == INPUT ||
- ( stream_.mode == DUPLEX && stream_.device[0] != stream_.device[1] ) ) {
-
- result = AudioDeviceStart( handle->id[1], callbackHandler );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::startStream: system error starting input callback procedure on device (" << stream_.device[1] << ").";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- handle->drainCounter = 0;
- handle->internalDrain = false;
- stream_.state = STREAM_RUNNING;
-
- unlock:
- MUTEX_UNLOCK( &stream_.mutex );
-
- if ( result == noErr ) return;
- error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiCore :: stopStream( void )
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiCore::stopStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
-
- OSStatus result = noErr;
- CoreHandle *handle = (CoreHandle *) stream_.apiHandle;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
-
- if ( handle->drainCounter == 0 ) {
- handle->drainCounter = 1;
- pthread_cond_wait( &handle->condition, &stream_.mutex ); // block until signaled
- }
-
- MUTEX_UNLOCK( &stream_.mutex );
- result = AudioDeviceStop( handle->id[0], callbackHandler );
- MUTEX_LOCK( &stream_.mutex );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::stopStream: system error (" << getErrorCode( result ) << ") stopping callback procedure on device (" << stream_.device[0] << ").";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- if ( stream_.mode == INPUT || ( stream_.mode == DUPLEX && stream_.device[0] != stream_.device[1] ) ) {
-
- MUTEX_UNLOCK( &stream_.mutex );
- result = AudioDeviceStop( handle->id[1], callbackHandler );
- MUTEX_LOCK( &stream_.mutex );
- if ( result != noErr ) {
- errorStream_ << "RtApiCore::stopStream: system error (" << getErrorCode( result ) << ") stopping input callback procedure on device (" << stream_.device[1] << ").";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- stream_.state = STREAM_STOPPED;
-
- unlock:
- MUTEX_UNLOCK( &stream_.mutex );
-
- if ( result == noErr ) return;
- error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiCore :: abortStream( void )
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiCore::abortStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- CoreHandle *handle = (CoreHandle *) stream_.apiHandle;
- handle->drainCounter = 1;
-
- stopStream();
-}
-
-bool RtApiCore :: callbackEvent( AudioDeviceID deviceId,
- const AudioBufferList *inBufferList,
- const AudioBufferList *outBufferList )
-{
- if ( stream_.state == STREAM_STOPPED ) return SUCCESS;
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiCore::callbackEvent(): the stream is closed ... this shouldn't happen!";
- error( RtError::WARNING );
- return FAILURE;
- }
-
- CallbackInfo *info = (CallbackInfo *) &stream_.callbackInfo;
- CoreHandle *handle = (CoreHandle *) stream_.apiHandle;
-
- // Check if we were draining the stream and signal is finished.
- if ( handle->drainCounter > 3 ) {
- if ( handle->internalDrain == false )
- pthread_cond_signal( &handle->condition );
- else
- stopStream();
- return SUCCESS;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- // The state might change while waiting on a mutex.
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return SUCCESS;
- }
-
- AudioDeviceID outputDevice = handle->id[0];
-
- // Invoke user callback to get fresh output data UNLESS we are
- // draining stream or duplex mode AND the input/output devices are
- // different AND this function is called for the input device.
- if ( handle->drainCounter == 0 && ( stream_.mode != DUPLEX || deviceId == outputDevice ) ) {
- RtAudioCallback callback = (RtAudioCallback) info->callback;
- double streamTime = getStreamTime();
- RtAudioStreamStatus status = 0;
- if ( stream_.mode != INPUT && handle->xrun[0] == true ) {
- status |= RTAUDIO_OUTPUT_UNDERFLOW;
- handle->xrun[0] = false;
- }
- if ( stream_.mode != OUTPUT && handle->xrun[1] == true ) {
- status |= RTAUDIO_INPUT_OVERFLOW;
- handle->xrun[1] = false;
- }
-
- handle->drainCounter = callback( stream_.userBuffer[0], stream_.userBuffer[1],
- stream_.bufferSize, streamTime, status, info->userData );
- if ( handle->drainCounter == 2 ) {
- MUTEX_UNLOCK( &stream_.mutex );
- abortStream();
- return SUCCESS;
- }
- else if ( handle->drainCounter == 1 )
- handle->internalDrain = true;
- }
-
- if ( stream_.mode == OUTPUT || ( stream_.mode == DUPLEX && deviceId == outputDevice ) ) {
-
- if ( handle->drainCounter > 1 ) { // write zeros to the output stream
-
- if ( handle->nStreams[0] == 1 ) {
- memset( outBufferList->mBuffers[handle->iStream[0]].mData,
- 0,
- outBufferList->mBuffers[handle->iStream[0]].mDataByteSize );
- }
- else { // fill multiple streams with zeros
- for ( unsigned int i=0; i<handle->nStreams[0]; i++ ) {
- memset( outBufferList->mBuffers[handle->iStream[0]+i].mData,
- 0,
- outBufferList->mBuffers[handle->iStream[0]+i].mDataByteSize );
- }
- }
- }
- else if ( handle->nStreams[0] == 1 ) {
- if ( stream_.doConvertBuffer[0] ) { // convert directly to CoreAudio stream buffer
- convertBuffer( (char *) outBufferList->mBuffers[handle->iStream[0]].mData,
- stream_.userBuffer[0], stream_.convertInfo[0] );
- }
- else { // copy from user buffer
- memcpy( outBufferList->mBuffers[handle->iStream[0]].mData,
- stream_.userBuffer[0],
- outBufferList->mBuffers[handle->iStream[0]].mDataByteSize );
- }
- }
- else { // fill multiple streams
- Float32 *inBuffer = (Float32 *) stream_.userBuffer[0];
- if ( stream_.doConvertBuffer[0] ) {
- convertBuffer( stream_.deviceBuffer, stream_.userBuffer[0], stream_.convertInfo[0] );
- inBuffer = (Float32 *) stream_.deviceBuffer;
- }
-
- if ( stream_.deviceInterleaved[0] == false ) { // mono mode
- UInt32 bufferBytes = outBufferList->mBuffers[handle->iStream[0]].mDataByteSize;
- for ( unsigned int i=0; i<stream_.nUserChannels[0]; i++ ) {
- memcpy( outBufferList->mBuffers[handle->iStream[0]+i].mData,
- (void *)&inBuffer[i*stream_.bufferSize], bufferBytes );
- }
- }
- else { // fill multiple multi-channel streams with interleaved data
- UInt32 streamChannels, channelsLeft, inJump, outJump, inOffset;
- Float32 *out, *in;
-
- bool inInterleaved = ( stream_.userInterleaved ) ? true : false;
- UInt32 inChannels = stream_.nUserChannels[0];
- if ( stream_.doConvertBuffer[0] ) {
- inInterleaved = true; // device buffer will always be interleaved for nStreams > 1 and not mono mode
- inChannels = stream_.nDeviceChannels[0];
- }
-
- if ( inInterleaved ) inOffset = 1;
- else inOffset = stream_.bufferSize;
-
- channelsLeft = inChannels;
- for ( unsigned int i=0; i<handle->nStreams[0]; i++ ) {
- in = inBuffer;
- out = (Float32 *) outBufferList->mBuffers[handle->iStream[0]+i].mData;
- streamChannels = outBufferList->mBuffers[handle->iStream[0]+i].mNumberChannels;
-
- outJump = 0;
- // Account for possible channel offset in first stream
- if ( i == 0 && stream_.channelOffset[0] > 0 ) {
- streamChannels -= stream_.channelOffset[0];
- outJump = stream_.channelOffset[0];
- out += outJump;
- }
-
- // Account for possible unfilled channels at end of the last stream
- if ( streamChannels > channelsLeft ) {
- outJump = streamChannels - channelsLeft;
- streamChannels = channelsLeft;
- }
-
- // Determine input buffer offsets and skips
- if ( inInterleaved ) {
- inJump = inChannels;
- in += inChannels - channelsLeft;
- }
- else {
- inJump = 1;
- in += (inChannels - channelsLeft) * inOffset;
- }
-
- for ( unsigned int i=0; i<stream_.bufferSize; i++ ) {
- for ( unsigned int j=0; j<streamChannels; j++ ) {
- *out++ = in[j*inOffset];
- }
- out += outJump;
- in += inJump;
- }
- channelsLeft -= streamChannels;
- }
- }
- }
-
- if ( handle->drainCounter ) {
- handle->drainCounter++;
- goto unlock;
- }
- }
-
- AudioDeviceID inputDevice;
- inputDevice = handle->id[1];
- if ( stream_.mode == INPUT || ( stream_.mode == DUPLEX && deviceId == inputDevice ) ) {
-
- if ( handle->nStreams[1] == 1 ) {
- if ( stream_.doConvertBuffer[1] ) { // convert directly from CoreAudio stream buffer
- convertBuffer( stream_.userBuffer[1],
- (char *) inBufferList->mBuffers[handle->iStream[1]].mData,
- stream_.convertInfo[1] );
- }
- else { // copy to user buffer
- memcpy( stream_.userBuffer[1],
- inBufferList->mBuffers[handle->iStream[1]].mData,
- inBufferList->mBuffers[handle->iStream[1]].mDataByteSize );
- }
- }
- else { // read from multiple streams
- Float32 *outBuffer = (Float32 *) stream_.userBuffer[1];
- if ( stream_.doConvertBuffer[1] ) outBuffer = (Float32 *) stream_.deviceBuffer;
-
- if ( stream_.deviceInterleaved[1] == false ) { // mono mode
- UInt32 bufferBytes = inBufferList->mBuffers[handle->iStream[1]].mDataByteSize;
- for ( unsigned int i=0; i<stream_.nUserChannels[1]; i++ ) {
- memcpy( (void *)&outBuffer[i*stream_.bufferSize],
- inBufferList->mBuffers[handle->iStream[1]+i].mData, bufferBytes );
- }
- }
- else { // read from multiple multi-channel streams
- UInt32 streamChannels, channelsLeft, inJump, outJump, outOffset;
- Float32 *out, *in;
-
- bool outInterleaved = ( stream_.userInterleaved ) ? true : false;
- UInt32 outChannels = stream_.nUserChannels[1];
- if ( stream_.doConvertBuffer[1] ) {
- outInterleaved = true; // device buffer will always be interleaved for nStreams > 1 and not mono mode
- outChannels = stream_.nDeviceChannels[1];
- }
-
- if ( outInterleaved ) outOffset = 1;
- else outOffset = stream_.bufferSize;
-
- channelsLeft = outChannels;
- for ( unsigned int i=0; i<handle->nStreams[1]; i++ ) {
- out = outBuffer;
- in = (Float32 *) inBufferList->mBuffers[handle->iStream[1]+i].mData;
- streamChannels = inBufferList->mBuffers[handle->iStream[1]+i].mNumberChannels;
-
- inJump = 0;
- // Account for possible channel offset in first stream
- if ( i == 0 && stream_.channelOffset[1] > 0 ) {
- streamChannels -= stream_.channelOffset[1];
- inJump = stream_.channelOffset[1];
- in += inJump;
- }
-
- // Account for possible unread channels at end of the last stream
- if ( streamChannels > channelsLeft ) {
- inJump = streamChannels - channelsLeft;
- streamChannels = channelsLeft;
- }
-
- // Determine output buffer offsets and skips
- if ( outInterleaved ) {
- outJump = outChannels;
- out += outChannels - channelsLeft;
- }
- else {
- outJump = 1;
- out += (outChannels - channelsLeft) * outOffset;
- }
-
- for ( unsigned int i=0; i<stream_.bufferSize; i++ ) {
- for ( unsigned int j=0; j<streamChannels; j++ ) {
- out[j*outOffset] = *in++;
- }
- out += outJump;
- in += inJump;
- }
- channelsLeft -= streamChannels;
- }
- }
-
- if ( stream_.doConvertBuffer[1] ) { // convert from our internal "device" buffer
- convertBuffer( stream_.userBuffer[1],
- stream_.deviceBuffer,
- stream_.convertInfo[1] );
- }
- }
- }
-
- unlock:
- MUTEX_UNLOCK( &stream_.mutex );
-
- RtApi::tickStreamTime();
- return SUCCESS;
-}
-
-const char* RtApiCore :: getErrorCode( OSStatus code )
-{
- switch( code ) {
-
- case kAudioHardwareNotRunningError:
- return "kAudioHardwareNotRunningError";
-
- case kAudioHardwareUnspecifiedError:
- return "kAudioHardwareUnspecifiedError";
-
- case kAudioHardwareUnknownPropertyError:
- return "kAudioHardwareUnknownPropertyError";
-
- case kAudioHardwareBadPropertySizeError:
- return "kAudioHardwareBadPropertySizeError";
-
- case kAudioHardwareIllegalOperationError:
- return "kAudioHardwareIllegalOperationError";
-
- case kAudioHardwareBadObjectError:
- return "kAudioHardwareBadObjectError";
-
- case kAudioHardwareBadDeviceError:
- return "kAudioHardwareBadDeviceError";
-
- case kAudioHardwareBadStreamError:
- return "kAudioHardwareBadStreamError";
-
- case kAudioHardwareUnsupportedOperationError:
- return "kAudioHardwareUnsupportedOperationError";
-
- case kAudioDeviceUnsupportedFormatError:
- return "kAudioDeviceUnsupportedFormatError";
-
- case kAudioDevicePermissionsError:
- return "kAudioDevicePermissionsError";
-
- default:
- return "CoreAudio unknown error";
- }
-}
-
- //******************** End of __MACOSX_CORE__ *********************//
-#endif
-
-#if defined(__UNIX_JACK__)
-
-// JACK is a low-latency audio server, originally written for the
-// GNU/Linux operating system and now also ported to OS-X. It can
-// connect a number of different applications to an audio device, as
-// well as allowing them to share audio between themselves.
-//
-// When using JACK with RtAudio, "devices" refer to JACK clients that
-// have ports connected to the server. The JACK server is typically
-// started in a terminal as follows:
-//
-// .jackd -d alsa -d hw:0
-//
-// or through an interface program such as qjackctl. Many of the
-// parameters normally set for a stream are fixed by the JACK server
-// and can be specified when the JACK server is started. In
-// particular,
-//
-// .jackd -d alsa -d hw:0 -r 44100 -p 512 -n 4
-//
-// specifies a sample rate of 44100 Hz, a buffer size of 512 sample
-// frames, and number of buffers = 4. Once the server is running, it
-// is not possible to override these values. If the values are not
-// specified in the command-line, the JACK server uses default values.
-//
-// The JACK server does not have to be running when an instance of
-// RtApiJack is created, though the function getDeviceCount() will
-// report 0 devices found until JACK has been started. When no
-// devices are available (i.e., the JACK server is not running), a
-// stream cannot be opened.
-
-#include <jack/jack.h>
-#include <unistd.h>
-#include <cstdio>
-
-// A structure to hold various information related to the Jack API
-// implementation.
-struct JackHandle {
- jack_client_t *client;
- jack_port_t **ports[2];
- std::string deviceName[2];
- bool xrun[2];
- pthread_cond_t condition;
- int drainCounter; // Tracks callback counts when draining
- bool internalDrain; // Indicates if stop is initiated from callback or not.
-
- JackHandle()
- :client(0), drainCounter(0), internalDrain(false) { ports[0] = 0; ports[1] = 0; xrun[0] = false; xrun[1] = false; }
-};
-
-ThreadHandle threadId;
-void jackSilentError( const char * ) {};
-
-RtApiJack :: RtApiJack()
-{
- // Nothing to do here.
-#if !defined(__RTAUDIO_DEBUG__)
- // Turn off Jack's internal error reporting.
- jack_set_error_function( &jackSilentError );
-#endif
-}
-
-RtApiJack :: ~RtApiJack()
-{
- if ( stream_.state != STREAM_CLOSED ) closeStream();
-}
-
-unsigned int RtApiJack :: getDeviceCount( void )
-{
- // See if we can become a jack client.
- jack_options_t options = (jack_options_t) ( JackNoStartServer ); //JackNullOption;
- jack_status_t *status = NULL;
- jack_client_t *client = jack_client_open( "RtApiJackCount", options, status );
- if ( client == 0 ) return 0;
-
- const char **ports;
- std::string port, previousPort;
- unsigned int nChannels = 0, nDevices = 0;
- ports = jack_get_ports( client, NULL, NULL, 0 );
- if ( ports ) {
- // Parse the port names up to the first colon (:).
- size_t iColon = 0;
- do {
- port = (char *) ports[ nChannels ];
- iColon = port.find(":");
- if ( iColon != std::string::npos ) {
- port = port.substr( 0, iColon + 1 );
- if ( port != previousPort ) {
- nDevices++;
- previousPort = port;
- }
- }
- } while ( ports[++nChannels] );
- free( ports );
- }
-
- jack_client_close( client );
- return nDevices;
-}
-
-RtAudio::DeviceInfo RtApiJack :: getDeviceInfo( unsigned int device )
-{
- RtAudio::DeviceInfo info;
- info.probed = false;
-
- jack_options_t options = (jack_options_t) ( JackNoStartServer ); //JackNullOption
- jack_status_t *status = NULL;
- jack_client_t *client = jack_client_open( "RtApiJackInfo", options, status );
- if ( client == 0 ) {
- errorText_ = "RtApiJack::getDeviceInfo: Jack server not found or connection error!";
- error( RtError::WARNING );
- return info;
- }
-
- const char **ports;
- std::string port, previousPort;
- unsigned int nPorts = 0, nDevices = 0;
- ports = jack_get_ports( client, NULL, NULL, 0 );
- if ( ports ) {
- // Parse the port names up to the first colon (:).
- size_t iColon = 0;
- do {
- port = (char *) ports[ nPorts ];
- iColon = port.find(":");
- if ( iColon != std::string::npos ) {
- port = port.substr( 0, iColon );
- if ( port != previousPort ) {
- if ( nDevices == device ) info.name = port;
- nDevices++;
- previousPort = port;
- }
- }
- } while ( ports[++nPorts] );
- free( ports );
- }
-
- if ( device >= nDevices ) {
- errorText_ = "RtApiJack::getDeviceInfo: device ID is invalid!";
- error( RtError::INVALID_USE );
- }
-
- // Get the current jack server sample rate.
- info.sampleRates.clear();
- info.sampleRates.push_back( jack_get_sample_rate( client ) );
-
- // Count the available ports containing the client name as device
- // channels. Jack "input ports" equal RtAudio output channels.
- unsigned int nChannels = 0;
- ports = jack_get_ports( client, info.name.c_str(), NULL, JackPortIsInput );
- if ( ports ) {
- while ( ports[ nChannels ] ) nChannels++;
- free( ports );
- info.outputChannels = nChannels;
- }
-
- // Jack "output ports" equal RtAudio input channels.
- nChannels = 0;
- ports = jack_get_ports( client, info.name.c_str(), NULL, JackPortIsOutput );
- if ( ports ) {
- while ( ports[ nChannels ] ) nChannels++;
- free( ports );
- info.inputChannels = nChannels;
- }
-
- if ( info.outputChannels == 0 && info.inputChannels == 0 ) {
- jack_client_close(client);
- errorText_ = "RtApiJack::getDeviceInfo: error determining Jack input/output channels!";
- error( RtError::WARNING );
- return info;
- }
-
- // If device opens for both playback and capture, we determine the channels.
- if ( info.outputChannels > 0 && info.inputChannels > 0 )
- info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;
-
- // Jack always uses 32-bit floats.
- info.nativeFormats = RTAUDIO_FLOAT32;
-
- // Jack doesn't provide default devices so we'll use the first available one.
- if ( device == 0 && info.outputChannels > 0 )
- info.isDefaultOutput = true;
- if ( device == 0 && info.inputChannels > 0 )
- info.isDefaultInput = true;
-
- jack_client_close(client);
- info.probed = true;
- return info;
-}
-
-int jackCallbackHandler( jack_nframes_t nframes, void *infoPointer )
-{
- CallbackInfo *info = (CallbackInfo *) infoPointer;
-
- RtApiJack *object = (RtApiJack *) info->object;
- if ( object->callbackEvent( (unsigned long) nframes ) == false ) return 1;
-
- return 0;
-}
-
-// This function will be called by a spawned thread when the Jack
-// server signals that it is shutting down. It is necessary to handle
-// it this way because the jackShutdown() function must return before
-// the jack_deactivate() function (in closeStream()) will return.
-extern "C" void *jackCloseStream( void *ptr )
-{
- CallbackInfo *info = (CallbackInfo *) ptr;
- RtApiJack *object = (RtApiJack *) info->object;
-
- object->closeStream();
-
- pthread_exit( NULL );
-}
-void jackShutdown( void *infoPointer )
-{
- CallbackInfo *info = (CallbackInfo *) infoPointer;
- RtApiJack *object = (RtApiJack *) info->object;
-
- // Check current stream state. If stopped, then we'll assume this
- // was called as a result of a call to RtApiJack::stopStream (the
- // deactivation of a client handle causes this function to be called).
- // If not, we'll assume the Jack server is shutting down or some
- // other problem occurred and we should close the stream.
- if ( object->isStreamRunning() == false ) return;
-
- pthread_create( &threadId, NULL, jackCloseStream, info );
- std::cerr << "\nRtApiJack: the Jack server is shutting down this client ... stream stopped and closed!!\n" << std::endl;
-}
-
-int jackXrun( void *infoPointer )
-{
- JackHandle *handle = (JackHandle *) infoPointer;
-
- if ( handle->ports[0] ) handle->xrun[0] = true;
- if ( handle->ports[1] ) handle->xrun[1] = true;
-
- return 0;
-}
-
-bool RtApiJack :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
- unsigned int firstChannel, unsigned int sampleRate,
- RtAudioFormat format, unsigned int *bufferSize,
- RtAudio::StreamOptions *options )
-{
- JackHandle *handle = (JackHandle *) stream_.apiHandle;
-
- // Look for jack server and try to become a client (only do once per stream).
- jack_client_t *client = 0;
- if ( mode == OUTPUT || ( mode == INPUT && stream_.mode != OUTPUT ) ) {
- jack_options_t jackoptions = (jack_options_t) ( JackNoStartServer ); //JackNullOption;
- jack_status_t *status = NULL;
- if ( options && !options->streamName.empty() )
- client = jack_client_open( options->streamName.c_str(), jackoptions, status );
- else
- client = jack_client_open( "RtApiJack", jackoptions, status );
- if ( client == 0 ) {
- errorText_ = "RtApiJack::probeDeviceOpen: Jack server not found or connection error!";
- error( RtError::WARNING );
- return FAILURE;
- }
- }
- else {
- // The handle must have been created on an earlier pass.
- client = handle->client;
- }
-
- const char **ports;
- std::string port, previousPort, deviceName;
- unsigned int nPorts = 0, nDevices = 0;
- ports = jack_get_ports( client, NULL, NULL, 0 );
- if ( ports ) {
- // Parse the port names up to the first colon (:).
- size_t iColon = 0;
- do {
- port = (char *) ports[ nPorts ];
- iColon = port.find(":");
- if ( iColon != std::string::npos ) {
- port = port.substr( 0, iColon );
- if ( port != previousPort ) {
- if ( nDevices == device ) deviceName = port;
- nDevices++;
- previousPort = port;
- }
- }
- } while ( ports[++nPorts] );
- free( ports );
- }
-
- if ( device >= nDevices ) {
- errorText_ = "RtApiJack::probeDeviceOpen: device ID is invalid!";
- return FAILURE;
- }
-
- // Count the available ports containing the client name as device
- // channels. Jack "input ports" equal RtAudio output channels.
- unsigned int nChannels = 0;
- unsigned long flag = JackPortIsInput;
- if ( mode == INPUT ) flag = JackPortIsOutput;
- ports = jack_get_ports( client, deviceName.c_str(), NULL, flag );
- if ( ports ) {
- while ( ports[ nChannels ] ) nChannels++;
- free( ports );
- }
-
- // Compare the jack ports for specified client to the requested number of channels.
- if ( nChannels < (channels + firstChannel) ) {
- errorStream_ << "RtApiJack::probeDeviceOpen: requested number of channels (" << channels << ") + offset (" << firstChannel << ") not found for specified device (" << device << ":" << deviceName << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Check the jack server sample rate.
- unsigned int jackRate = jack_get_sample_rate( client );
- if ( sampleRate != jackRate ) {
- jack_client_close( client );
- errorStream_ << "RtApiJack::probeDeviceOpen: the requested sample rate (" << sampleRate << ") is different than the JACK server rate (" << jackRate << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- stream_.sampleRate = jackRate;
-
- // Get the latency of the JACK port.
- ports = jack_get_ports( client, deviceName.c_str(), NULL, flag );
- if ( ports[ firstChannel ] )
- stream_.latency[mode] = jack_port_get_latency( jack_port_by_name( client, ports[ firstChannel ] ) );
- free( ports );
-
- // The jack server always uses 32-bit floating-point data.
- stream_.deviceFormat[mode] = RTAUDIO_FLOAT32;
- stream_.userFormat = format;
-
- if ( options && options->flags & RTAUDIO_NONINTERLEAVED ) stream_.userInterleaved = false;
- else stream_.userInterleaved = true;
-
- // Jack always uses non-interleaved buffers.
- stream_.deviceInterleaved[mode] = false;
-
- // Jack always provides host byte-ordered data.
- stream_.doByteSwap[mode] = false;
-
- // Get the buffer size. The buffer size and number of buffers
- // (periods) is set when the jack server is started.
- stream_.bufferSize = (int) jack_get_buffer_size( client );
- *bufferSize = stream_.bufferSize;
-
- stream_.nDeviceChannels[mode] = channels;
- stream_.nUserChannels[mode] = channels;
-
- // Set flags for buffer conversion.
- stream_.doConvertBuffer[mode] = false;
- if ( stream_.userFormat != stream_.deviceFormat[mode] )
- stream_.doConvertBuffer[mode] = true;
- if ( stream_.userInterleaved != stream_.deviceInterleaved[mode] &&
- stream_.nUserChannels[mode] > 1 )
- stream_.doConvertBuffer[mode] = true;
-
- // Allocate our JackHandle structure for the stream.
- if ( handle == 0 ) {
- try {
- handle = new JackHandle;
- }
- catch ( std::bad_alloc& ) {
- errorText_ = "RtApiJack::probeDeviceOpen: error allocating JackHandle memory.";
- goto error;
- }
-
- if ( pthread_cond_init(&handle->condition, NULL) ) {
- errorText_ = "RtApiJack::probeDeviceOpen: error initializing pthread condition variable.";
- goto error;
- }
- stream_.apiHandle = (void *) handle;
- handle->client = client;
- }
- handle->deviceName[mode] = deviceName;
-
- // Allocate necessary internal buffers.
- unsigned long bufferBytes;
- bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );
- stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );
- if ( stream_.userBuffer[mode] == NULL ) {
- errorText_ = "RtApiJack::probeDeviceOpen: error allocating user buffer memory.";
- goto error;
- }
-
- if ( stream_.doConvertBuffer[mode] ) {
-
- bool makeBuffer = true;
- if ( mode == OUTPUT )
- bufferBytes = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );
- else { // mode == INPUT
- bufferBytes = stream_.nDeviceChannels[1] * formatBytes( stream_.deviceFormat[1] );
- if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {
- unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes(stream_.deviceFormat[0]);
- if ( bufferBytes < bytesOut ) makeBuffer = false;
- }
- }
-
- if ( makeBuffer ) {
- bufferBytes *= *bufferSize;
- if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );
- stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );
- if ( stream_.deviceBuffer == NULL ) {
- errorText_ = "RtApiJack::probeDeviceOpen: error allocating device buffer memory.";
- goto error;
- }
- }
- }
-
- // Allocate memory for the Jack ports (channels) identifiers.
- handle->ports[mode] = (jack_port_t **) malloc ( sizeof (jack_port_t *) * channels );
- if ( handle->ports[mode] == NULL ) {
- errorText_ = "RtApiJack::probeDeviceOpen: error allocating port memory.";
- goto error;
- }
-
- stream_.device[mode] = device;
- stream_.channelOffset[mode] = firstChannel;
- stream_.state = STREAM_STOPPED;
- stream_.callbackInfo.object = (void *) this;
-
- if ( stream_.mode == OUTPUT && mode == INPUT )
- // We had already set up the stream for output.
- stream_.mode = DUPLEX;
- else {
- stream_.mode = mode;
- jack_set_process_callback( handle->client, jackCallbackHandler, (void *) &stream_.callbackInfo );
- jack_set_xrun_callback( handle->client, jackXrun, (void *) &handle );
- jack_on_shutdown( handle->client, jackShutdown, (void *) &stream_.callbackInfo );
- }
-
- // Register our ports.
- char label[64];
- if ( mode == OUTPUT ) {
- for ( unsigned int i=0; i<stream_.nUserChannels[0]; i++ ) {
- snprintf( label, 64, "outport %d", i );
- handle->ports[0][i] = jack_port_register( handle->client, (const char *)label,
- JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0 );
- }
- }
- else {
- for ( unsigned int i=0; i<stream_.nUserChannels[1]; i++ ) {
- snprintf( label, 64, "inport %d", i );
- handle->ports[1][i] = jack_port_register( handle->client, (const char *)label,
- JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0 );
- }
- }
-
- // Setup the buffer conversion information structure. We don't use
- // buffers to do channel offsets, so we override that parameter
- // here.
- if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, 0 );
-
- return SUCCESS;
-
- error:
- if ( handle ) {
- pthread_cond_destroy( &handle->condition );
- jack_client_close( handle->client );
-
- if ( handle->ports[0] ) free( handle->ports[0] );
- if ( handle->ports[1] ) free( handle->ports[1] );
-
- delete handle;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- return FAILURE;
-}
-
-void RtApiJack :: closeStream( void )
-{
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiJack::closeStream(): no open stream to close!";
- error( RtError::WARNING );
- return;
- }
-
- JackHandle *handle = (JackHandle *) stream_.apiHandle;
- if ( handle ) {
-
- if ( stream_.state == STREAM_RUNNING )
- jack_deactivate( handle->client );
-
- jack_client_close( handle->client );
- }
-
- if ( handle ) {
- if ( handle->ports[0] ) free( handle->ports[0] );
- if ( handle->ports[1] ) free( handle->ports[1] );
- pthread_cond_destroy( &handle->condition );
- delete handle;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- stream_.mode = UNINITIALIZED;
- stream_.state = STREAM_CLOSED;
-}
-
-void RtApiJack :: startStream( void )
-{
- verifyStream();
- if ( stream_.state == STREAM_RUNNING ) {
- errorText_ = "RtApiJack::startStream(): the stream is already running!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK(&stream_.mutex);
-
- JackHandle *handle = (JackHandle *) stream_.apiHandle;
- int result = jack_activate( handle->client );
- if ( result ) {
- errorText_ = "RtApiJack::startStream(): unable to activate JACK client!";
- goto unlock;
- }
-
- const char **ports;
-
- // Get the list of available ports.
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
- result = 1;
- ports = jack_get_ports( handle->client, handle->deviceName[0].c_str(), NULL, JackPortIsInput);
- if ( ports == NULL) {
- errorText_ = "RtApiJack::startStream(): error determining available JACK input ports!";
- goto unlock;
- }
-
- // Now make the port connections. Since RtAudio wasn't designed to
- // allow the user to select particular channels of a device, we'll
- // just open the first "nChannels" ports with offset.
- for ( unsigned int i=0; i<stream_.nUserChannels[0]; i++ ) {
- result = 1;
- if ( ports[ stream_.channelOffset[0] + i ] )
- result = jack_connect( handle->client, jack_port_name( handle->ports[0][i] ), ports[ stream_.channelOffset[0] + i ] );
- if ( result ) {
- free( ports );
- errorText_ = "RtApiJack::startStream(): error connecting output ports!";
- goto unlock;
- }
- }
- free(ports);
- }
-
- if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {
- result = 1;
- ports = jack_get_ports( handle->client, handle->deviceName[1].c_str(), NULL, JackPortIsOutput );
- if ( ports == NULL) {
- errorText_ = "RtApiJack::startStream(): error determining available JACK output ports!";
- goto unlock;
- }
-
- // Now make the port connections. See note above.
- for ( unsigned int i=0; i<stream_.nUserChannels[1]; i++ ) {
- result = 1;
- if ( ports[ stream_.channelOffset[1] + i ] )
- result = jack_connect( handle->client, ports[ stream_.channelOffset[1] + i ], jack_port_name( handle->ports[1][i] ) );
- if ( result ) {
- free( ports );
- errorText_ = "RtApiJack::startStream(): error connecting input ports!";
- goto unlock;
- }
- }
- free(ports);
- }
-
- handle->drainCounter = 0;
- handle->internalDrain = false;
- stream_.state = STREAM_RUNNING;
-
- unlock:
- MUTEX_UNLOCK(&stream_.mutex);
-
- if ( result == 0 ) return;
- error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiJack :: stopStream( void )
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiJack::stopStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
-
- JackHandle *handle = (JackHandle *) stream_.apiHandle;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
-
- if ( handle->drainCounter == 0 ) {
- handle->drainCounter = 1;
- pthread_cond_wait( &handle->condition, &stream_.mutex ); // block until signaled
- }
- }
-
- jack_deactivate( handle->client );
- stream_.state = STREAM_STOPPED;
-
- MUTEX_UNLOCK( &stream_.mutex );
-}
-
-void RtApiJack :: abortStream( void )
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiJack::abortStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- JackHandle *handle = (JackHandle *) stream_.apiHandle;
- handle->drainCounter = 1;
-
- stopStream();
-}
-
-// This function will be called by a spawned thread when the user
-// callback function signals that the stream should be stopped or
-// aborted. It is necessary to handle it this way because the
-// callbackEvent() function must return before the jack_deactivate()
-// function will return.
-extern "C" void *jackStopStream( void *ptr )
-{
- CallbackInfo *info = (CallbackInfo *) ptr;
- RtApiJack *object = (RtApiJack *) info->object;
-
- object->stopStream();
-
- pthread_exit( NULL );
-}
-
-bool RtApiJack :: callbackEvent( unsigned long nframes )
-{
- if ( stream_.state == STREAM_STOPPED ) return SUCCESS;
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiCore::callbackEvent(): the stream is closed ... this shouldn't happen!";
- error( RtError::WARNING );
- return FAILURE;
- }
- if ( stream_.bufferSize != nframes ) {
- errorText_ = "RtApiCore::callbackEvent(): the JACK buffer size has changed ... cannot process!";
- error( RtError::WARNING );
- return FAILURE;
- }
-
- CallbackInfo *info = (CallbackInfo *) &stream_.callbackInfo;
- JackHandle *handle = (JackHandle *) stream_.apiHandle;
-
- // Check if we were draining the stream and signal is finished.
- if ( handle->drainCounter > 3 ) {
- if ( handle->internalDrain == true ) {
- pthread_create( &threadId, NULL, jackStopStream, info );
- }
- else
- pthread_cond_signal( &handle->condition );
- return SUCCESS;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- // The state might change while waiting on a mutex.
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return SUCCESS;
- }
-
- // Invoke user callback first, to get fresh output data.
- if ( handle->drainCounter == 0 ) {
- RtAudioCallback callback = (RtAudioCallback) info->callback;
- double streamTime = getStreamTime();
- RtAudioStreamStatus status = 0;
- if ( stream_.mode != INPUT && handle->xrun[0] == true ) {
- status |= RTAUDIO_OUTPUT_UNDERFLOW;
- handle->xrun[0] = false;
- }
- if ( stream_.mode != OUTPUT && handle->xrun[1] == true ) {
- status |= RTAUDIO_INPUT_OVERFLOW;
- handle->xrun[1] = false;
- }
- handle->drainCounter = callback( stream_.userBuffer[0], stream_.userBuffer[1],
- stream_.bufferSize, streamTime, status, info->userData );
- if ( handle->drainCounter == 2 ) {
- MUTEX_UNLOCK( &stream_.mutex );
- ThreadHandle id;
- pthread_create( &id, NULL, jackStopStream, info );
- return SUCCESS;
- }
- else if ( handle->drainCounter == 1 )
- handle->internalDrain = true;
- }
-
- jack_default_audio_sample_t *jackbuffer;
- unsigned long bufferBytes = nframes * sizeof( jack_default_audio_sample_t );
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
-
- if ( handle->drainCounter > 0 ) { // write zeros to the output stream
-
- for ( unsigned int i=0; i<stream_.nDeviceChannels[0]; i++ ) {
- jackbuffer = (jack_default_audio_sample_t *) jack_port_get_buffer( handle->ports[0][i], (jack_nframes_t) nframes );
- memset( jackbuffer, 0, bufferBytes );
- }
-
- }
- else if ( stream_.doConvertBuffer[0] ) {
-
- convertBuffer( stream_.deviceBuffer, stream_.userBuffer[0], stream_.convertInfo[0] );
-
- for ( unsigned int i=0; i<stream_.nDeviceChannels[0]; i++ ) {
- jackbuffer = (jack_default_audio_sample_t *) jack_port_get_buffer( handle->ports[0][i], (jack_nframes_t) nframes );
- memcpy( jackbuffer, &stream_.deviceBuffer[i*bufferBytes], bufferBytes );
- }
- }
- else { // no buffer conversion
- for ( unsigned int i=0; i<stream_.nUserChannels[0]; i++ ) {
- jackbuffer = (jack_default_audio_sample_t *) jack_port_get_buffer( handle->ports[0][i], (jack_nframes_t) nframes );
- memcpy( jackbuffer, &stream_.userBuffer[0][i*bufferBytes], bufferBytes );
- }
- }
-
- if ( handle->drainCounter ) {
- handle->drainCounter++;
- goto unlock;
- }
- }
-
- if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {
-
- if ( stream_.doConvertBuffer[1] ) {
- for ( unsigned int i=0; i<stream_.nDeviceChannels[1]; i++ ) {
- jackbuffer = (jack_default_audio_sample_t *) jack_port_get_buffer( handle->ports[1][i], (jack_nframes_t) nframes );
- memcpy( &stream_.deviceBuffer[i*bufferBytes], jackbuffer, bufferBytes );
- }
- convertBuffer( stream_.userBuffer[1], stream_.deviceBuffer, stream_.convertInfo[1] );
- }
- else { // no buffer conversion
- for ( unsigned int i=0; i<stream_.nUserChannels[1]; i++ ) {
- jackbuffer = (jack_default_audio_sample_t *) jack_port_get_buffer( handle->ports[1][i], (jack_nframes_t) nframes );
- memcpy( &stream_.userBuffer[1][i*bufferBytes], jackbuffer, bufferBytes );
- }
- }
- }
-
- unlock:
- MUTEX_UNLOCK(&stream_.mutex);
-
- RtApi::tickStreamTime();
- return SUCCESS;
-}
- //******************** End of __UNIX_JACK__ *********************//
-#endif
-
-#if defined(__WINDOWS_ASIO__) // ASIO API on Windows
-
-// The ASIO API is designed around a callback scheme, so this
-// implementation is similar to that used for OS-X CoreAudio and Linux
-// Jack. The primary constraint with ASIO is that it only allows
-// access to a single driver at a time. Thus, it is not possible to
-// have more than one simultaneous RtAudio stream.
-//
-// This implementation also requires a number of external ASIO files
-// and a few global variables. The ASIO callback scheme does not
-// allow for the passing of user data, so we must create a global
-// pointer to our callbackInfo structure.
-//
-// On unix systems, we make use of a pthread condition variable.
-// Since there is no equivalent in Windows, I hacked something based
-// on information found in
-// http://www.cs.wustl.edu/~schmidt/win32-cv-1.html.
-
-#include "asiosys.h"
-#include "asio.h"
-#include "iasiothiscallresolver.h"
-#include "asiodrivers.h"
-#include <cmath>
-
-AsioDrivers drivers;
-ASIOCallbacks asioCallbacks;
-ASIODriverInfo driverInfo;
-CallbackInfo *asioCallbackInfo;
-bool asioXRun;
-
-struct AsioHandle {
- int drainCounter; // Tracks callback counts when draining
- bool internalDrain; // Indicates if stop is initiated from callback or not.
- ASIOBufferInfo *bufferInfos;
- HANDLE condition;
-
- AsioHandle()
- :drainCounter(0), internalDrain(false), bufferInfos(0) {}
-};
-
-// Function declarations (definitions at end of section)
-static const char* getAsioErrorString( ASIOError result );
-void sampleRateChanged( ASIOSampleRate sRate );
-long asioMessages( long selector, long value, void* message, double* opt );
-
-RtApiAsio :: RtApiAsio()
-{
- // ASIO cannot run on a multi-threaded appartment. You can call
- // CoInitialize beforehand, but it must be for appartment threading
- // (in which case, CoInitilialize will return S_FALSE here).
- coInitialized_ = false;
- HRESULT hr = CoInitialize( NULL );
- if ( FAILED(hr) ) {
- errorText_ = "RtApiAsio::ASIO requires a single-threaded appartment. Call CoInitializeEx(0,COINIT_APARTMENTTHREADED)";
- error( RtError::WARNING );
- }
- coInitialized_ = true;
-
- drivers.removeCurrentDriver();
- driverInfo.asioVersion = 2;
-
- // See note in DirectSound implementation about GetDesktopWindow().
- driverInfo.sysRef = GetForegroundWindow();
-}
-
-RtApiAsio :: ~RtApiAsio()
-{
- if ( stream_.state != STREAM_CLOSED ) closeStream();
- if ( coInitialized_ ) CoUninitialize();
-}
-
-unsigned int RtApiAsio :: getDeviceCount( void )
-{
- return (unsigned int) drivers.asioGetNumDev();
-}
-
-RtAudio::DeviceInfo RtApiAsio :: getDeviceInfo( unsigned int device )
-{
- RtAudio::DeviceInfo info;
- info.probed = false;
-
- // Get device ID
- unsigned int nDevices = getDeviceCount();
- if ( nDevices == 0 ) {
- errorText_ = "RtApiAsio::getDeviceInfo: no devices found!";
- error( RtError::INVALID_USE );
- }
-
- if ( device >= nDevices ) {
- errorText_ = "RtApiAsio::getDeviceInfo: device ID is invalid!";
- error( RtError::INVALID_USE );
- }
-
- // If a stream is already open, we cannot probe other devices. Thus, use the saved results.
- if ( stream_.state != STREAM_CLOSED ) {
- if ( device >= devices_.size() ) {
- errorText_ = "RtApiAsio::getDeviceInfo: device ID was not present before stream was opened.";
- error( RtError::WARNING );
- return info;
- }
- return devices_[ device ];
- }
-
- char driverName[32];
- ASIOError result = drivers.asioGetDriverName( (int) device, driverName, 32 );
- if ( result != ASE_OK ) {
- errorStream_ << "RtApiAsio::getDeviceInfo: unable to get driver name (" << getAsioErrorString( result ) << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- info.name = driverName;
-
- if ( !drivers.loadDriver( driverName ) ) {
- errorStream_ << "RtApiAsio::getDeviceInfo: unable to load driver (" << driverName << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- result = ASIOInit( &driverInfo );
- if ( result != ASE_OK ) {
- errorStream_ << "RtApiAsio::getDeviceInfo: error (" << getAsioErrorString( result ) << ") initializing driver (" << driverName << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Determine the device channel information.
- long inputChannels, outputChannels;
- result = ASIOGetChannels( &inputChannels, &outputChannels );
- if ( result != ASE_OK ) {
- drivers.removeCurrentDriver();
- errorStream_ << "RtApiAsio::getDeviceInfo: error (" << getAsioErrorString( result ) << ") getting channel count (" << driverName << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- info.outputChannels = outputChannels;
- info.inputChannels = inputChannels;
- if ( info.outputChannels > 0 && info.inputChannels > 0 )
- info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;
-
- // Determine the supported sample rates.
- info.sampleRates.clear();
- for ( unsigned int i=0; i<MAX_SAMPLE_RATES; i++ ) {
- result = ASIOCanSampleRate( (ASIOSampleRate) SAMPLE_RATES[i] );
- if ( result == ASE_OK )
- info.sampleRates.push_back( SAMPLE_RATES[i] );
- }
-
- // Determine supported data types ... just check first channel and assume rest are the same.
- ASIOChannelInfo channelInfo;
- channelInfo.channel = 0;
- channelInfo.isInput = true;
- if ( info.inputChannels <= 0 ) channelInfo.isInput = false;
- result = ASIOGetChannelInfo( &channelInfo );
- if ( result != ASE_OK ) {
- drivers.removeCurrentDriver();
- errorStream_ << "RtApiAsio::getDeviceInfo: error (" << getAsioErrorString( result ) << ") getting driver channel info (" << driverName << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- info.nativeFormats = 0;
- if ( channelInfo.type == ASIOSTInt16MSB || channelInfo.type == ASIOSTInt16LSB )
- info.nativeFormats |= RTAUDIO_SINT16;
- else if ( channelInfo.type == ASIOSTInt32MSB || channelInfo.type == ASIOSTInt32LSB )
- info.nativeFormats |= RTAUDIO_SINT32;
- else if ( channelInfo.type == ASIOSTFloat32MSB || channelInfo.type == ASIOSTFloat32LSB )
- info.nativeFormats |= RTAUDIO_FLOAT32;
- else if ( channelInfo.type == ASIOSTFloat64MSB || channelInfo.type == ASIOSTFloat64LSB )
- info.nativeFormats |= RTAUDIO_FLOAT64;
-
- if ( info.outputChannels > 0 )
- if ( getDefaultOutputDevice() == device ) info.isDefaultOutput = true;
- if ( info.inputChannels > 0 )
- if ( getDefaultInputDevice() == device ) info.isDefaultInput = true;
-
- info.probed = true;
- drivers.removeCurrentDriver();
- return info;
-}
-
-void bufferSwitch( long index, ASIOBool processNow )
-{
- RtApiAsio *object = (RtApiAsio *) asioCallbackInfo->object;
- object->callbackEvent( index );
-}
-
-void RtApiAsio :: saveDeviceInfo( void )
-{
- devices_.clear();
-
- unsigned int nDevices = getDeviceCount();
- devices_.resize( nDevices );
- for ( unsigned int i=0; i<nDevices; i++ )
- devices_[i] = getDeviceInfo( i );
-}
-
-bool RtApiAsio :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
- unsigned int firstChannel, unsigned int sampleRate,
- RtAudioFormat format, unsigned int *bufferSize,
- RtAudio::StreamOptions *options )
-{
- // For ASIO, a duplex stream MUST use the same driver.
- if ( mode == INPUT && stream_.mode == OUTPUT && stream_.device[0] != device ) {
- errorText_ = "RtApiAsio::probeDeviceOpen: an ASIO duplex stream must use the same device for input and output!";
- return FAILURE;
- }
-
- char driverName[32];
- ASIOError result = drivers.asioGetDriverName( (int) device, driverName, 32 );
- if ( result != ASE_OK ) {
- errorStream_ << "RtApiAsio::probeDeviceOpen: unable to get driver name (" << getAsioErrorString( result ) << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // The getDeviceInfo() function will not work when a stream is open
- // because ASIO does not allow multiple devices to run at the same
- // time. Thus, we'll probe the system before opening a stream and
- // save the results for use by getDeviceInfo().
- this->saveDeviceInfo();
-
- // Only load the driver once for duplex stream.
- if ( mode != INPUT || stream_.mode != OUTPUT ) {
- if ( !drivers.loadDriver( driverName ) ) {
- errorStream_ << "RtApiAsio::probeDeviceOpen: unable to load driver (" << driverName << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- result = ASIOInit( &driverInfo );
- if ( result != ASE_OK ) {
- errorStream_ << "RtApiAsio::probeDeviceOpen: error (" << getAsioErrorString( result ) << ") initializing driver (" << driverName << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
-
- // Check the device channel count.
- long inputChannels, outputChannels;
- result = ASIOGetChannels( &inputChannels, &outputChannels );
- if ( result != ASE_OK ) {
- drivers.removeCurrentDriver();
- errorStream_ << "RtApiAsio::probeDeviceOpen: error (" << getAsioErrorString( result ) << ") getting channel count (" << driverName << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- if ( ( mode == OUTPUT && (channels+firstChannel) > (unsigned int) outputChannels) ||
- ( mode == INPUT && (channels+firstChannel) > (unsigned int) inputChannels) ) {
- drivers.removeCurrentDriver();
- errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") does not support requested channel count (" << channels << ") + offset (" << firstChannel << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- stream_.nDeviceChannels[mode] = channels;
- stream_.nUserChannels[mode] = channels;
- stream_.channelOffset[mode] = firstChannel;
-
- // Verify the sample rate is supported.
- result = ASIOCanSampleRate( (ASIOSampleRate) sampleRate );
- if ( result != ASE_OK ) {
- drivers.removeCurrentDriver();
- errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") does not support requested sample rate (" << sampleRate << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Get the current sample rate
- ASIOSampleRate currentRate;
- result = ASIOGetSampleRate( ¤tRate );
- if ( result != ASE_OK ) {
- drivers.removeCurrentDriver();
- errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error getting sample rate.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Set the sample rate only if necessary
- if ( currentRate != sampleRate ) {
- result = ASIOSetSampleRate( (ASIOSampleRate) sampleRate );
- if ( result != ASE_OK ) {
- drivers.removeCurrentDriver();
- errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error setting sample rate (" << sampleRate << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
-
- // Determine the driver data type.
- ASIOChannelInfo channelInfo;
- channelInfo.channel = 0;
- if ( mode == OUTPUT ) channelInfo.isInput = false;
- else channelInfo.isInput = true;
- result = ASIOGetChannelInfo( &channelInfo );
- if ( result != ASE_OK ) {
- drivers.removeCurrentDriver();
- errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error (" << getAsioErrorString( result ) << ") getting data format.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Assuming WINDOWS host is always little-endian.
- stream_.doByteSwap[mode] = false;
- stream_.userFormat = format;
- stream_.deviceFormat[mode] = 0;
- if ( channelInfo.type == ASIOSTInt16MSB || channelInfo.type == ASIOSTInt16LSB ) {
- stream_.deviceFormat[mode] = RTAUDIO_SINT16;
- if ( channelInfo.type == ASIOSTInt16MSB ) stream_.doByteSwap[mode] = true;
- }
- else if ( channelInfo.type == ASIOSTInt32MSB || channelInfo.type == ASIOSTInt32LSB ) {
- stream_.deviceFormat[mode] = RTAUDIO_SINT32;
- if ( channelInfo.type == ASIOSTInt32MSB ) stream_.doByteSwap[mode] = true;
- }
- else if ( channelInfo.type == ASIOSTFloat32MSB || channelInfo.type == ASIOSTFloat32LSB ) {
- stream_.deviceFormat[mode] = RTAUDIO_FLOAT32;
- if ( channelInfo.type == ASIOSTFloat32MSB ) stream_.doByteSwap[mode] = true;
- }
- else if ( channelInfo.type == ASIOSTFloat64MSB || channelInfo.type == ASIOSTFloat64LSB ) {
- stream_.deviceFormat[mode] = RTAUDIO_FLOAT64;
- if ( channelInfo.type == ASIOSTFloat64MSB ) stream_.doByteSwap[mode] = true;
- }
-
- if ( stream_.deviceFormat[mode] == 0 ) {
- drivers.removeCurrentDriver();
- errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") data format not supported by RtAudio.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Set the buffer size. For a duplex stream, this will end up
- // setting the buffer size based on the input constraints, which
- // should be ok.
- long minSize, maxSize, preferSize, granularity;
- result = ASIOGetBufferSize( &minSize, &maxSize, &preferSize, &granularity );
- if ( result != ASE_OK ) {
- drivers.removeCurrentDriver();
- errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error (" << getAsioErrorString( result ) << ") getting buffer size.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- if ( *bufferSize < (unsigned int) minSize ) *bufferSize = (unsigned int) minSize;
- else if ( *bufferSize > (unsigned int) maxSize ) *bufferSize = (unsigned int) maxSize;
- else if ( granularity == -1 ) {
- // Make sure bufferSize is a power of two.
- int log2_of_min_size = 0;
- int log2_of_max_size = 0;
-
- for ( unsigned int i = 0; i < sizeof(long) * 8; i++ ) {
- if ( minSize & ((long)1 << i) ) log2_of_min_size = i;
- if ( maxSize & ((long)1 << i) ) log2_of_max_size = i;
- }
-
- long min_delta = std::abs( (long)*bufferSize - ((long)1 << log2_of_min_size) );
- int min_delta_num = log2_of_min_size;
-
- for (int i = log2_of_min_size + 1; i <= log2_of_max_size; i++) {
- long current_delta = std::abs( (long)*bufferSize - ((long)1 << i) );
- if (current_delta < min_delta) {
- min_delta = current_delta;
- min_delta_num = i;
- }
- }
-
- *bufferSize = ( (unsigned int)1 << min_delta_num );
- if ( *bufferSize < (unsigned int) minSize ) *bufferSize = (unsigned int) minSize;
- else if ( *bufferSize > (unsigned int) maxSize ) *bufferSize = (unsigned int) maxSize;
- }
- else if ( granularity != 0 ) {
- // Set to an even multiple of granularity, rounding up.
- *bufferSize = (*bufferSize + granularity-1) / granularity * granularity;
- }
-
- if ( mode == INPUT && stream_.mode == OUTPUT && stream_.bufferSize != *bufferSize ) {
- drivers.removeCurrentDriver();
- errorText_ = "RtApiAsio::probeDeviceOpen: input/output buffersize discrepancy!";
- return FAILURE;
- }
-
- stream_.bufferSize = *bufferSize;
- stream_.nBuffers = 2;
-
- if ( options && options->flags & RTAUDIO_NONINTERLEAVED ) stream_.userInterleaved = false;
- else stream_.userInterleaved = true;
-
- // ASIO always uses non-interleaved buffers.
- stream_.deviceInterleaved[mode] = false;
-
- // Allocate, if necessary, our AsioHandle structure for the stream.
- AsioHandle *handle = (AsioHandle *) stream_.apiHandle;
- if ( handle == 0 ) {
- try {
- handle = new AsioHandle;
- }
- catch ( std::bad_alloc& ) {
- //if ( handle == NULL ) {
- drivers.removeCurrentDriver();
- errorText_ = "RtApiAsio::probeDeviceOpen: error allocating AsioHandle memory.";
- return FAILURE;
- }
- handle->bufferInfos = 0;
-
- // Create a manual-reset event.
- handle->condition = CreateEvent( NULL, // no security
- TRUE, // manual-reset
- FALSE, // non-signaled initially
- NULL ); // unnamed
- stream_.apiHandle = (void *) handle;
- }
-
- // Create the ASIO internal buffers. Since RtAudio sets up input
- // and output separately, we'll have to dispose of previously
- // created output buffers for a duplex stream.
- long inputLatency, outputLatency;
- if ( mode == INPUT && stream_.mode == OUTPUT ) {
- ASIODisposeBuffers();
- if ( handle->bufferInfos ) free( handle->bufferInfos );
- }
-
- // Allocate, initialize, and save the bufferInfos in our stream callbackInfo structure.
- bool buffersAllocated = false;
- unsigned int i, nChannels = stream_.nDeviceChannels[0] + stream_.nDeviceChannels[1];
- handle->bufferInfos = (ASIOBufferInfo *) malloc( nChannels * sizeof(ASIOBufferInfo) );
- if ( handle->bufferInfos == NULL ) {
- errorStream_ << "RtApiAsio::probeDeviceOpen: error allocating bufferInfo memory for driver (" << driverName << ").";
- errorText_ = errorStream_.str();
- goto error;
- }
-
- ASIOBufferInfo *infos;
- infos = handle->bufferInfos;
- for ( i=0; i<stream_.nDeviceChannels[0]; i++, infos++ ) {
- infos->isInput = ASIOFalse;
- infos->channelNum = i + stream_.channelOffset[0];
- infos->buffers[0] = infos->buffers[1] = 0;
- }
- for ( i=0; i<stream_.nDeviceChannels[1]; i++, infos++ ) {
- infos->isInput = ASIOTrue;
- infos->channelNum = i + stream_.channelOffset[1];
- infos->buffers[0] = infos->buffers[1] = 0;
- }
-
- // Set up the ASIO callback structure and create the ASIO data buffers.
- asioCallbacks.bufferSwitch = &bufferSwitch;
- asioCallbacks.sampleRateDidChange = &sampleRateChanged;
- asioCallbacks.asioMessage = &asioMessages;
- asioCallbacks.bufferSwitchTimeInfo = NULL;
- result = ASIOCreateBuffers( handle->bufferInfos, nChannels, stream_.bufferSize, &asioCallbacks );
- if ( result != ASE_OK ) {
- errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error (" << getAsioErrorString( result ) << ") creating buffers.";
- errorText_ = errorStream_.str();
- goto error;
- }
- buffersAllocated = true;
-
- // Set flags for buffer conversion.
- stream_.doConvertBuffer[mode] = false;
- if ( stream_.userFormat != stream_.deviceFormat[mode] )
- stream_.doConvertBuffer[mode] = true;
- if ( stream_.userInterleaved != stream_.deviceInterleaved[mode] &&
- stream_.nUserChannels[mode] > 1 )
- stream_.doConvertBuffer[mode] = true;
-
- // Allocate necessary internal buffers
- unsigned long bufferBytes;
- bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );
- stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );
- if ( stream_.userBuffer[mode] == NULL ) {
- errorText_ = "RtApiAsio::probeDeviceOpen: error allocating user buffer memory.";
- goto error;
- }
-
- if ( stream_.doConvertBuffer[mode] ) {
-
- bool makeBuffer = true;
- bufferBytes = stream_.nDeviceChannels[mode] * formatBytes( stream_.deviceFormat[mode] );
- if ( mode == INPUT ) {
- if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {
- unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );
- if ( bufferBytes <= bytesOut ) makeBuffer = false;
- }
- }
-
- if ( makeBuffer ) {
- bufferBytes *= *bufferSize;
- if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );
- stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );
- if ( stream_.deviceBuffer == NULL ) {
- errorText_ = "RtApiAsio::probeDeviceOpen: error allocating device buffer memory.";
- goto error;
- }
- }
- }
-
- stream_.sampleRate = sampleRate;
- stream_.device[mode] = device;
- stream_.state = STREAM_STOPPED;
- asioCallbackInfo = &stream_.callbackInfo;
- stream_.callbackInfo.object = (void *) this;
- if ( stream_.mode == OUTPUT && mode == INPUT )
- // We had already set up an output stream.
- stream_.mode = DUPLEX;
- else
- stream_.mode = mode;
-
- // Determine device latencies
- result = ASIOGetLatencies( &inputLatency, &outputLatency );
- if ( result != ASE_OK ) {
- errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error (" << getAsioErrorString( result ) << ") getting latency.";
- errorText_ = errorStream_.str();
- error( RtError::WARNING); // warn but don't fail
- }
- else {
- stream_.latency[0] = outputLatency;
- stream_.latency[1] = inputLatency;
- }
-
- // Setup the buffer conversion information structure. We don't use
- // buffers to do channel offsets, so we override that parameter
- // here.
- if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, 0 );
-
- return SUCCESS;
-
- error:
- if ( buffersAllocated )
- ASIODisposeBuffers();
- drivers.removeCurrentDriver();
-
- if ( handle ) {
- CloseHandle( handle->condition );
- if ( handle->bufferInfos )
- free( handle->bufferInfos );
- delete handle;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- return FAILURE;
-}
-
-void RtApiAsio :: closeStream()
-{
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiAsio::closeStream(): no open stream to close!";
- error( RtError::WARNING );
- return;
- }
-
- if ( stream_.state == STREAM_RUNNING ) {
- stream_.state = STREAM_STOPPED;
- ASIOStop();
- }
- ASIODisposeBuffers();
- drivers.removeCurrentDriver();
-
- AsioHandle *handle = (AsioHandle *) stream_.apiHandle;
- if ( handle ) {
- CloseHandle( handle->condition );
- if ( handle->bufferInfos )
- free( handle->bufferInfos );
- delete handle;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- stream_.mode = UNINITIALIZED;
- stream_.state = STREAM_CLOSED;
-}
-
-void RtApiAsio :: startStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_RUNNING ) {
- errorText_ = "RtApiAsio::startStream(): the stream is already running!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- AsioHandle *handle = (AsioHandle *) stream_.apiHandle;
- ASIOError result = ASIOStart();
- if ( result != ASE_OK ) {
- errorStream_ << "RtApiAsio::startStream: error (" << getAsioErrorString( result ) << ") starting device.";
- errorText_ = errorStream_.str();
- goto unlock;
- }
-
- handle->drainCounter = 0;
- handle->internalDrain = false;
- stream_.state = STREAM_RUNNING;
- asioXRun = false;
-
- unlock:
- MUTEX_UNLOCK( &stream_.mutex );
-
- if ( result == ASE_OK ) return;
- error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiAsio :: stopStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiAsio::stopStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
-
- AsioHandle *handle = (AsioHandle *) stream_.apiHandle;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
- if ( handle->drainCounter == 0 ) {
- handle->drainCounter = 1;
- MUTEX_UNLOCK( &stream_.mutex );
- WaitForMultipleObjects( 1, &handle->condition, FALSE, INFINITE ); // block until signaled
- ResetEvent( handle->condition );
- MUTEX_LOCK( &stream_.mutex );
- }
- }
-
- ASIOError result = ASIOStop();
- if ( result != ASE_OK ) {
- errorStream_ << "RtApiAsio::stopStream: error (" << getAsioErrorString( result ) << ") stopping device.";
- errorText_ = errorStream_.str();
- }
-
- stream_.state = STREAM_STOPPED;
- MUTEX_UNLOCK( &stream_.mutex );
-
- if ( result == ASE_OK ) return;
- error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiAsio :: abortStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiAsio::abortStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- // The following lines were commented-out because some behavior was
- // noted where the device buffers need to be zeroed to avoid
- // continuing sound, even when the device buffers are completely
- // disposed. So now, calling abort is the same as calling stop.
- // AsioHandle *handle = (AsioHandle *) stream_.apiHandle;
- // handle->drainCounter = 1;
- stopStream();
-}
-
-bool RtApiAsio :: callbackEvent( long bufferIndex )
-{
- if ( stream_.state == STREAM_STOPPED ) return SUCCESS;
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiAsio::callbackEvent(): the stream is closed ... this shouldn't happen!";
- error( RtError::WARNING );
- return FAILURE;
- }
-
- CallbackInfo *info = (CallbackInfo *) &stream_.callbackInfo;
- AsioHandle *handle = (AsioHandle *) stream_.apiHandle;
-
- // Check if we were draining the stream and signal is finished.
- if ( handle->drainCounter > 3 ) {
- if ( handle->internalDrain == false )
- SetEvent( handle->condition );
- else
- stopStream();
- return SUCCESS;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- // The state might change while waiting on a mutex.
- if ( stream_.state == STREAM_STOPPED ) goto unlock;
-
- // Invoke user callback to get fresh output data UNLESS we are
- // draining stream.
- if ( handle->drainCounter == 0 ) {
- RtAudioCallback callback = (RtAudioCallback) info->callback;
- double streamTime = getStreamTime();
- RtAudioStreamStatus status = 0;
- if ( stream_.mode != INPUT && asioXRun == true ) {
- status |= RTAUDIO_OUTPUT_UNDERFLOW;
- asioXRun = false;
- }
- if ( stream_.mode != OUTPUT && asioXRun == true ) {
- status |= RTAUDIO_INPUT_OVERFLOW;
- asioXRun = false;
- }
- handle->drainCounter = callback( stream_.userBuffer[0], stream_.userBuffer[1],
- stream_.bufferSize, streamTime, status, info->userData );
- if ( handle->drainCounter == 2 ) {
- MUTEX_UNLOCK( &stream_.mutex );
- abortStream();
- return SUCCESS;
- }
- else if ( handle->drainCounter == 1 )
- handle->internalDrain = true;
- }
-
- unsigned int nChannels, bufferBytes, i, j;
- nChannels = stream_.nDeviceChannels[0] + stream_.nDeviceChannels[1];
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
-
- bufferBytes = stream_.bufferSize * formatBytes( stream_.deviceFormat[0] );
-
- if ( handle->drainCounter > 1 ) { // write zeros to the output stream
-
- for ( i=0, j=0; i<nChannels; i++ ) {
- if ( handle->bufferInfos[i].isInput != ASIOTrue )
- memset( handle->bufferInfos[i].buffers[bufferIndex], 0, bufferBytes );
- }
-
- }
- else if ( stream_.doConvertBuffer[0] ) {
-
- convertBuffer( stream_.deviceBuffer, stream_.userBuffer[0], stream_.convertInfo[0] );
- if ( stream_.doByteSwap[0] )
- byteSwapBuffer( stream_.deviceBuffer,
- stream_.bufferSize * stream_.nDeviceChannels[0],
- stream_.deviceFormat[0] );
-
- for ( i=0, j=0; i<nChannels; i++ ) {
- if ( handle->bufferInfos[i].isInput != ASIOTrue )
- memcpy( handle->bufferInfos[i].buffers[bufferIndex],
- &stream_.deviceBuffer[j++*bufferBytes], bufferBytes );
- }
-
- }
- else {
-
- if ( stream_.doByteSwap[0] )
- byteSwapBuffer( stream_.userBuffer[0],
- stream_.bufferSize * stream_.nUserChannels[0],
- stream_.userFormat );
-
- for ( i=0, j=0; i<nChannels; i++ ) {
- if ( handle->bufferInfos[i].isInput != ASIOTrue )
- memcpy( handle->bufferInfos[i].buffers[bufferIndex],
- &stream_.userBuffer[0][bufferBytes*j++], bufferBytes );
- }
-
- }
-
- if ( handle->drainCounter ) {
- handle->drainCounter++;
- goto unlock;
- }
- }
-
- if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {
-
- bufferBytes = stream_.bufferSize * formatBytes(stream_.deviceFormat[1]);
-
- if (stream_.doConvertBuffer[1]) {
-
- // Always interleave ASIO input data.
- for ( i=0, j=0; i<nChannels; i++ ) {
- if ( handle->bufferInfos[i].isInput == ASIOTrue )
- memcpy( &stream_.deviceBuffer[j++*bufferBytes],
- handle->bufferInfos[i].buffers[bufferIndex],
- bufferBytes );
- }
-
- if ( stream_.doByteSwap[1] )
- byteSwapBuffer( stream_.deviceBuffer,
- stream_.bufferSize * stream_.nDeviceChannels[1],
- stream_.deviceFormat[1] );
- convertBuffer( stream_.userBuffer[1], stream_.deviceBuffer, stream_.convertInfo[1] );
-
- }
- else {
- for ( i=0, j=0; i<nChannels; i++ ) {
- if ( handle->bufferInfos[i].isInput == ASIOTrue ) {
- memcpy( &stream_.userBuffer[1][bufferBytes*j++],
- handle->bufferInfos[i].buffers[bufferIndex],
- bufferBytes );
- }
- }
-
- if ( stream_.doByteSwap[1] )
- byteSwapBuffer( stream_.userBuffer[1],
- stream_.bufferSize * stream_.nUserChannels[1],
- stream_.userFormat );
- }
- }
-
- unlock:
- // The following call was suggested by Malte Clasen. While the API
- // documentation indicates it should not be required, some device
- // drivers apparently do not function correctly without it.
- ASIOOutputReady();
-
- MUTEX_UNLOCK( &stream_.mutex );
-
- RtApi::tickStreamTime();
- return SUCCESS;
-}
-
-void sampleRateChanged( ASIOSampleRate sRate )
-{
- // The ASIO documentation says that this usually only happens during
- // external sync. Audio processing is not stopped by the driver,
- // actual sample rate might not have even changed, maybe only the
- // sample rate status of an AES/EBU or S/PDIF digital input at the
- // audio device.
-
- RtApi *object = (RtApi *) asioCallbackInfo->object;
- try {
- object->stopStream();
- }
- catch ( RtError &exception ) {
- std::cerr << "\nRtApiAsio: sampleRateChanged() error (" << exception.getMessage() << ")!\n" << std::endl;
- return;
- }
-
- std::cerr << "\nRtApiAsio: driver reports sample rate changed to " << sRate << " ... stream stopped!!!\n" << std::endl;
-}
-
-long asioMessages( long selector, long value, void* message, double* opt )
-{
- long ret = 0;
-
- switch( selector ) {
- case kAsioSelectorSupported:
- if ( value == kAsioResetRequest
- || value == kAsioEngineVersion
- || value == kAsioResyncRequest
- || value == kAsioLatenciesChanged
- // The following three were added for ASIO 2.0, you don't
- // necessarily have to support them.
- || value == kAsioSupportsTimeInfo
- || value == kAsioSupportsTimeCode
- || value == kAsioSupportsInputMonitor)
- ret = 1L;
- break;
- case kAsioResetRequest:
- // Defer the task and perform the reset of the driver during the
- // next "safe" situation. You cannot reset the driver right now,
- // as this code is called from the driver. Reset the driver is
- // done by completely destruct is. I.e. ASIOStop(),
- // ASIODisposeBuffers(), Destruction Afterwards you initialize the
- // driver again.
- std::cerr << "\nRtApiAsio: driver reset requested!!!" << std::endl;
- ret = 1L;
- break;
- case kAsioResyncRequest:
- // This informs the application that the driver encountered some
- // non-fatal data loss. It is used for synchronization purposes
- // of different media. Added mainly to work around the Win16Mutex
- // problems in Windows 95/98 with the Windows Multimedia system,
- // which could lose data because the Mutex was held too long by
- // another thread. However a driver can issue it in other
- // situations, too.
- // std::cerr << "\nRtApiAsio: driver resync requested!!!" << std::endl;
- asioXRun = true;
- ret = 1L;
- break;
- case kAsioLatenciesChanged:
- // This will inform the host application that the drivers were
- // latencies changed. Beware, it this does not mean that the
- // buffer sizes have changed! You might need to update internal
- // delay data.
- std::cerr << "\nRtApiAsio: driver latency may have changed!!!" << std::endl;
- ret = 1L;
- break;
- case kAsioEngineVersion:
- // Return the supported ASIO version of the host application. If
- // a host application does not implement this selector, ASIO 1.0
- // is assumed by the driver.
- ret = 2L;
- break;
- case kAsioSupportsTimeInfo:
- // Informs the driver whether the
- // asioCallbacks.bufferSwitchTimeInfo() callback is supported.
- // For compatibility with ASIO 1.0 drivers the host application
- // should always support the "old" bufferSwitch method, too.
- ret = 0;
- break;
- case kAsioSupportsTimeCode:
- // Informs the driver whether application is interested in time
- // code info. If an application does not need to know about time
- // code, the driver has less work to do.
- ret = 0;
- break;
- }
- return ret;
-}
-
-static const char* getAsioErrorString( ASIOError result )
-{
- struct Messages
- {
- ASIOError value;
- const char*message;
- };
-
- static Messages m[] =
- {
- { ASE_NotPresent, "Hardware input or output is not present or available." },
- { ASE_HWMalfunction, "Hardware is malfunctioning." },
- { ASE_InvalidParameter, "Invalid input parameter." },
- { ASE_InvalidMode, "Invalid mode." },
- { ASE_SPNotAdvancing, "Sample position not advancing." },
- { ASE_NoClock, "Sample clock or rate cannot be determined or is not present." },
- { ASE_NoMemory, "Not enough memory to complete the request." }
- };
-
- for ( unsigned int i = 0; i < sizeof(m)/sizeof(m[0]); ++i )
- if ( m[i].value == result ) return m[i].message;
-
- return "Unknown error.";
-}
-//******************** End of __WINDOWS_ASIO__ *********************//
-#endif
-
-
-#if defined(__WINDOWS_DS__) // Windows DirectSound API
-
-// Modified by Robin Davies, October 2005
-// - Improvements to DirectX pointer chasing.
-// - Bug fix for non-power-of-two Asio granularity used by Edirol PCR-A30.
-// - Auto-call CoInitialize for DSOUND and ASIO platforms.
-// Various revisions for RtAudio 4.0 by Gary Scavone, April 2007
-// Changed device query structure for RtAudio 4.0.7, January 2010
-
-#include <dsound.h>
-#include <assert.h>
-#include <algorithm>
-
-#if defined(__MINGW32__)
- // missing from latest mingw winapi
-#define WAVE_FORMAT_96M08 0x00010000 /* 96 kHz, Mono, 8-bit */
-#define WAVE_FORMAT_96S08 0x00020000 /* 96 kHz, Stereo, 8-bit */
-#define WAVE_FORMAT_96M16 0x00040000 /* 96 kHz, Mono, 16-bit */
-#define WAVE_FORMAT_96S16 0x00080000 /* 96 kHz, Stereo, 16-bit */
-#endif
-
-#define MINIMUM_DEVICE_BUFFER_SIZE 32768
-
-#ifdef _MSC_VER // if Microsoft Visual C++
-#pragma comment( lib, "winmm.lib" ) // then, auto-link winmm.lib. Otherwise, it has to be added manually.
-#endif
-
-static inline DWORD dsPointerBetween( DWORD pointer, DWORD laterPointer, DWORD earlierPointer, DWORD bufferSize )
-{
- if ( pointer > bufferSize ) pointer -= bufferSize;
- if ( laterPointer < earlierPointer ) laterPointer += bufferSize;
- if ( pointer < earlierPointer ) pointer += bufferSize;
- return pointer >= earlierPointer && pointer < laterPointer;
-}
-
-// A structure to hold various information related to the DirectSound
-// API implementation.
-struct DsHandle {
- unsigned int drainCounter; // Tracks callback counts when draining
- bool internalDrain; // Indicates if stop is initiated from callback or not.
- void *id[2];
- void *buffer[2];
- bool xrun[2];
- UINT bufferPointer[2];
- DWORD dsBufferSize[2];
- DWORD dsPointerLeadTime[2]; // the number of bytes ahead of the safe pointer to lead by.
- HANDLE condition;
-
- DsHandle()
- :drainCounter(0), internalDrain(false) { id[0] = 0; id[1] = 0; buffer[0] = 0; buffer[1] = 0; xrun[0] = false; xrun[1] = false; bufferPointer[0] = 0; bufferPointer[1] = 0; }
-};
-
-// Declarations for utility functions, callbacks, and structures
-// specific to the DirectSound implementation.
-static BOOL CALLBACK deviceQueryCallback( LPGUID lpguid,
- LPCTSTR description,
- LPCTSTR module,
- LPVOID lpContext );
-
-static const char* getErrorString( int code );
-
-extern "C" unsigned __stdcall callbackHandler( void *ptr );
-
-struct DsDevice {
- LPGUID id[2];
- bool validId[2];
- bool found;
- std::string name;
-
- DsDevice()
- : found(false) { validId[0] = false; validId[1] = false; }
-};
-
-std::vector< DsDevice > dsDevices;
-
-RtApiDs :: RtApiDs()
-{
- // Dsound will run both-threaded. If CoInitialize fails, then just
- // accept whatever the mainline chose for a threading model.
- coInitialized_ = false;
- HRESULT hr = CoInitialize( NULL );
- if ( !FAILED( hr ) ) coInitialized_ = true;
-}
-
-RtApiDs :: ~RtApiDs()
-{
- if ( coInitialized_ ) CoUninitialize(); // balanced call.
- if ( stream_.state != STREAM_CLOSED ) closeStream();
-}
-
-// The DirectSound default output is always the first device.
-unsigned int RtApiDs :: getDefaultOutputDevice( void )
-{
- return 0;
-}
-
-// The DirectSound default input is always the first input device,
-// which is the first capture device enumerated.
-unsigned int RtApiDs :: getDefaultInputDevice( void )
-{
- return 0;
-}
-
-unsigned int RtApiDs :: getDeviceCount( void )
-{
- // Set query flag for previously found devices to false, so that we
- // can check for any devices that have disappeared.
- for ( unsigned int i=0; i<dsDevices.size(); i++ )
- dsDevices[i].found = false;
-
- // Query DirectSound devices.
- bool isInput = false;
- HRESULT result = DirectSoundEnumerate( (LPDSENUMCALLBACK) deviceQueryCallback, &isInput );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::getDeviceCount: error (" << getErrorString( result ) << ") enumerating output devices!";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- }
-
- // Query DirectSoundCapture devices.
- isInput = true;
- result = DirectSoundCaptureEnumerate( (LPDSENUMCALLBACK) deviceQueryCallback, &isInput );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::getDeviceCount: error (" << getErrorString( result ) << ") enumerating input devices!";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- }
-
- // Clean out any devices that may have disappeared.
- std::vector< DsDevice > :: iterator it;
- for ( it=dsDevices.begin(); it < dsDevices.end(); it++ )
- if ( it->found == false ) dsDevices.erase( it );
-
- return dsDevices.size();
-}
-
-RtAudio::DeviceInfo RtApiDs :: getDeviceInfo( unsigned int device )
-{
- RtAudio::DeviceInfo info;
- info.probed = false;
-
- if ( dsDevices.size() == 0 ) {
- // Force a query of all devices
- getDeviceCount();
- if ( dsDevices.size() == 0 ) {
- errorText_ = "RtApiDs::getDeviceInfo: no devices found!";
- error( RtError::INVALID_USE );
- }
- }
-
- if ( device >= dsDevices.size() ) {
- errorText_ = "RtApiDs::getDeviceInfo: device ID is invalid!";
- error( RtError::INVALID_USE );
- }
-
- HRESULT result;
- if ( dsDevices[ device ].validId[0] == false ) goto probeInput;
-
- LPDIRECTSOUND output;
- DSCAPS outCaps;
- result = DirectSoundCreate( dsDevices[ device ].id[0], &output, NULL );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::getDeviceInfo: error (" << getErrorString( result ) << ") opening output device (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- goto probeInput;
- }
-
- outCaps.dwSize = sizeof( outCaps );
- result = output->GetCaps( &outCaps );
- if ( FAILED( result ) ) {
- output->Release();
- errorStream_ << "RtApiDs::getDeviceInfo: error (" << getErrorString( result ) << ") getting capabilities!";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- goto probeInput;
- }
-
- // Get output channel information.
- info.outputChannels = ( outCaps.dwFlags & DSCAPS_PRIMARYSTEREO ) ? 2 : 1;
-
- // Get sample rate information.
- info.sampleRates.clear();
- for ( unsigned int k=0; k<MAX_SAMPLE_RATES; k++ ) {
- if ( SAMPLE_RATES[k] >= (unsigned int) outCaps.dwMinSecondarySampleRate &&
- SAMPLE_RATES[k] <= (unsigned int) outCaps.dwMaxSecondarySampleRate )
- info.sampleRates.push_back( SAMPLE_RATES[k] );
- }
-
- // Get format information.
- if ( outCaps.dwFlags & DSCAPS_PRIMARY16BIT ) info.nativeFormats |= RTAUDIO_SINT16;
- if ( outCaps.dwFlags & DSCAPS_PRIMARY8BIT ) info.nativeFormats |= RTAUDIO_SINT8;
-
- output->Release();
-
- if ( getDefaultOutputDevice() == device )
- info.isDefaultOutput = true;
-
- if ( dsDevices[ device ].validId[1] == false ) {
- info.name = dsDevices[ device ].name;
- info.probed = true;
- return info;
- }
-
- probeInput:
-
- LPDIRECTSOUNDCAPTURE input;
- result = DirectSoundCaptureCreate( dsDevices[ device ].id[1], &input, NULL );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::getDeviceInfo: error (" << getErrorString( result ) << ") opening input device (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- DSCCAPS inCaps;
- inCaps.dwSize = sizeof( inCaps );
- result = input->GetCaps( &inCaps );
- if ( FAILED( result ) ) {
- input->Release();
- errorStream_ << "RtApiDs::getDeviceInfo: error (" << getErrorString( result ) << ") getting object capabilities (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Get input channel information.
- info.inputChannels = inCaps.dwChannels;
-
- // Get sample rate and format information.
- std::vector<unsigned int> rates;
- if ( inCaps.dwChannels == 2 ) {
- if ( inCaps.dwFormats & WAVE_FORMAT_1S16 ) info.nativeFormats |= RTAUDIO_SINT16;
- if ( inCaps.dwFormats & WAVE_FORMAT_2S16 ) info.nativeFormats |= RTAUDIO_SINT16;
- if ( inCaps.dwFormats & WAVE_FORMAT_4S16 ) info.nativeFormats |= RTAUDIO_SINT16;
- if ( inCaps.dwFormats & WAVE_FORMAT_96S16 ) info.nativeFormats |= RTAUDIO_SINT16;
- if ( inCaps.dwFormats & WAVE_FORMAT_1S08 ) info.nativeFormats |= RTAUDIO_SINT8;
- if ( inCaps.dwFormats & WAVE_FORMAT_2S08 ) info.nativeFormats |= RTAUDIO_SINT8;
- if ( inCaps.dwFormats & WAVE_FORMAT_4S08 ) info.nativeFormats |= RTAUDIO_SINT8;
- if ( inCaps.dwFormats & WAVE_FORMAT_96S08 ) info.nativeFormats |= RTAUDIO_SINT8;
-
- if ( info.nativeFormats & RTAUDIO_SINT16 ) {
- if ( inCaps.dwFormats & WAVE_FORMAT_1S16 ) rates.push_back( 11025 );
- if ( inCaps.dwFormats & WAVE_FORMAT_2S16 ) rates.push_back( 22050 );
- if ( inCaps.dwFormats & WAVE_FORMAT_4S16 ) rates.push_back( 44100 );
- if ( inCaps.dwFormats & WAVE_FORMAT_96S16 ) rates.push_back( 96000 );
- }
- else if ( info.nativeFormats & RTAUDIO_SINT8 ) {
- if ( inCaps.dwFormats & WAVE_FORMAT_1S08 ) rates.push_back( 11025 );
- if ( inCaps.dwFormats & WAVE_FORMAT_2S08 ) rates.push_back( 22050 );
- if ( inCaps.dwFormats & WAVE_FORMAT_4S08 ) rates.push_back( 44100 );
- if ( inCaps.dwFormats & WAVE_FORMAT_96S08 ) rates.push_back( 96000 );
- }
- }
- else if ( inCaps.dwChannels == 1 ) {
- if ( inCaps.dwFormats & WAVE_FORMAT_1M16 ) info.nativeFormats |= RTAUDIO_SINT16;
- if ( inCaps.dwFormats & WAVE_FORMAT_2M16 ) info.nativeFormats |= RTAUDIO_SINT16;
- if ( inCaps.dwFormats & WAVE_FORMAT_4M16 ) info.nativeFormats |= RTAUDIO_SINT16;
- if ( inCaps.dwFormats & WAVE_FORMAT_96M16 ) info.nativeFormats |= RTAUDIO_SINT16;
- if ( inCaps.dwFormats & WAVE_FORMAT_1M08 ) info.nativeFormats |= RTAUDIO_SINT8;
- if ( inCaps.dwFormats & WAVE_FORMAT_2M08 ) info.nativeFormats |= RTAUDIO_SINT8;
- if ( inCaps.dwFormats & WAVE_FORMAT_4M08 ) info.nativeFormats |= RTAUDIO_SINT8;
- if ( inCaps.dwFormats & WAVE_FORMAT_96M08 ) info.nativeFormats |= RTAUDIO_SINT8;
-
- if ( info.nativeFormats & RTAUDIO_SINT16 ) {
- if ( inCaps.dwFormats & WAVE_FORMAT_1M16 ) rates.push_back( 11025 );
- if ( inCaps.dwFormats & WAVE_FORMAT_2M16 ) rates.push_back( 22050 );
- if ( inCaps.dwFormats & WAVE_FORMAT_4M16 ) rates.push_back( 44100 );
- if ( inCaps.dwFormats & WAVE_FORMAT_96M16 ) rates.push_back( 96000 );
- }
- else if ( info.nativeFormats & RTAUDIO_SINT8 ) {
- if ( inCaps.dwFormats & WAVE_FORMAT_1M08 ) rates.push_back( 11025 );
- if ( inCaps.dwFormats & WAVE_FORMAT_2M08 ) rates.push_back( 22050 );
- if ( inCaps.dwFormats & WAVE_FORMAT_4M08 ) rates.push_back( 44100 );
- if ( inCaps.dwFormats & WAVE_FORMAT_96M08 ) rates.push_back( 96000 );
- }
- }
- else info.inputChannels = 0; // technically, this would be an error
-
- input->Release();
-
- if ( info.inputChannels == 0 ) return info;
-
- // Copy the supported rates to the info structure but avoid duplication.
- bool found;
- for ( unsigned int i=0; i<rates.size(); i++ ) {
- found = false;
- for ( unsigned int j=0; j<info.sampleRates.size(); j++ ) {
- if ( rates[i] == info.sampleRates[j] ) {
- found = true;
- break;
- }
- }
- if ( found == false ) info.sampleRates.push_back( rates[i] );
- }
- sort( info.sampleRates.begin(), info.sampleRates.end() );
-
- // If device opens for both playback and capture, we determine the channels.
- if ( info.outputChannels > 0 && info.inputChannels > 0 )
- info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;
-
- if ( device == 0 ) info.isDefaultInput = true;
-
- // Copy name and return.
- info.name = dsDevices[ device ].name;
- info.probed = true;
- return info;
-}
-
-bool RtApiDs :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
- unsigned int firstChannel, unsigned int sampleRate,
- RtAudioFormat format, unsigned int *bufferSize,
- RtAudio::StreamOptions *options )
-{
- if ( channels + firstChannel > 2 ) {
- errorText_ = "RtApiDs::probeDeviceOpen: DirectSound does not support more than 2 channels per device.";
- return FAILURE;
- }
-
- unsigned int nDevices = dsDevices.size();
- if ( nDevices == 0 ) {
- // This should not happen because a check is made before this function is called.
- errorText_ = "RtApiDs::probeDeviceOpen: no devices found!";
- return FAILURE;
- }
-
- if ( device >= nDevices ) {
- // This should not happen because a check is made before this function is called.
- errorText_ = "RtApiDs::probeDeviceOpen: device ID is invalid!";
- return FAILURE;
- }
-
- if ( mode == OUTPUT ) {
- if ( dsDevices[ device ].validId[0] == false ) {
- errorStream_ << "RtApiDs::probeDeviceOpen: device (" << device << ") does not support output!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
- else { // mode == INPUT
- if ( dsDevices[ device ].validId[1] == false ) {
- errorStream_ << "RtApiDs::probeDeviceOpen: device (" << device << ") does not support input!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
-
- // According to a note in PortAudio, using GetDesktopWindow()
- // instead of GetForegroundWindow() is supposed to avoid problems
- // that occur when the application's window is not the foreground
- // window. Also, if the application window closes before the
- // DirectSound buffer, DirectSound can crash. In the past, I had
- // problems when using GetDesktopWindow() but it seems fine now
- // (January 2010). I'll leave it commented here.
- // HWND hWnd = GetForegroundWindow();
- HWND hWnd = GetDesktopWindow();
-
- // Check the numberOfBuffers parameter and limit the lowest value to
- // two. This is a judgement call and a value of two is probably too
- // low for capture, but it should work for playback.
- int nBuffers = 0;
- if ( options ) nBuffers = options->numberOfBuffers;
- if ( options && options->flags & RTAUDIO_MINIMIZE_LATENCY ) nBuffers = 2;
- if ( nBuffers < 2 ) nBuffers = 3;
-
- // Check the lower range of the user-specified buffer size and set
- // (arbitrarily) to a lower bound of 32.
- if ( *bufferSize < 32 ) *bufferSize = 32;
-
- // Create the wave format structure. The data format setting will
- // be determined later.
- WAVEFORMATEX waveFormat;
- ZeroMemory( &waveFormat, sizeof(WAVEFORMATEX) );
- waveFormat.wFormatTag = WAVE_FORMAT_PCM;
- waveFormat.nChannels = channels + firstChannel;
- waveFormat.nSamplesPerSec = (unsigned long) sampleRate;
-
- // Determine the device buffer size. By default, we'll use the value
- // defined above (32K), but we will grow it to make allowances for
- // very large software buffer sizes.
- DWORD dsBufferSize = MINIMUM_DEVICE_BUFFER_SIZE;;
- DWORD dsPointerLeadTime = 0;
-
- void *ohandle = 0, *bhandle = 0;
- HRESULT result;
- if ( mode == OUTPUT ) {
-
- LPDIRECTSOUND output;
- result = DirectSoundCreate( dsDevices[ device ].id[0], &output, NULL );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") opening output device (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- DSCAPS outCaps;
- outCaps.dwSize = sizeof( outCaps );
- result = output->GetCaps( &outCaps );
- if ( FAILED( result ) ) {
- output->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") getting capabilities (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Check channel information.
- if ( channels + firstChannel == 2 && !( outCaps.dwFlags & DSCAPS_PRIMARYSTEREO ) ) {
- errorStream_ << "RtApiDs::getDeviceInfo: the output device (" << dsDevices[ device ].name << ") does not support stereo playback.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Check format information. Use 16-bit format unless not
- // supported or user requests 8-bit.
- if ( outCaps.dwFlags & DSCAPS_PRIMARY16BIT &&
- !( format == RTAUDIO_SINT8 && outCaps.dwFlags & DSCAPS_PRIMARY8BIT ) ) {
- waveFormat.wBitsPerSample = 16;
- stream_.deviceFormat[mode] = RTAUDIO_SINT16;
- }
- else {
- waveFormat.wBitsPerSample = 8;
- stream_.deviceFormat[mode] = RTAUDIO_SINT8;
- }
- stream_.userFormat = format;
-
- // Update wave format structure and buffer information.
- waveFormat.nBlockAlign = waveFormat.nChannels * waveFormat.wBitsPerSample / 8;
- waveFormat.nAvgBytesPerSec = waveFormat.nSamplesPerSec * waveFormat.nBlockAlign;
- dsPointerLeadTime = nBuffers * (*bufferSize) * (waveFormat.wBitsPerSample / 8) * channels;
-
- // If the user wants an even bigger buffer, increase the device buffer size accordingly.
- while ( dsPointerLeadTime * 2U > dsBufferSize )
- dsBufferSize *= 2;
-
- // Set cooperative level to DSSCL_EXCLUSIVE ... sound stops when window focus changes.
- // result = output->SetCooperativeLevel( hWnd, DSSCL_EXCLUSIVE );
- // Set cooperative level to DSSCL_PRIORITY ... sound remains when window focus changes.
- result = output->SetCooperativeLevel( hWnd, DSSCL_PRIORITY );
- if ( FAILED( result ) ) {
- output->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") setting cooperative level (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Even though we will write to the secondary buffer, we need to
- // access the primary buffer to set the correct output format
- // (since the default is 8-bit, 22 kHz!). Setup the DS primary
- // buffer description.
- DSBUFFERDESC bufferDescription;
- ZeroMemory( &bufferDescription, sizeof( DSBUFFERDESC ) );
- bufferDescription.dwSize = sizeof( DSBUFFERDESC );
- bufferDescription.dwFlags = DSBCAPS_PRIMARYBUFFER;
-
- // Obtain the primary buffer
- LPDIRECTSOUNDBUFFER buffer;
- result = output->CreateSoundBuffer( &bufferDescription, &buffer, NULL );
- if ( FAILED( result ) ) {
- output->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") accessing primary buffer (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Set the primary DS buffer sound format.
- result = buffer->SetFormat( &waveFormat );
- if ( FAILED( result ) ) {
- output->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") setting primary buffer format (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Setup the secondary DS buffer description.
- ZeroMemory( &bufferDescription, sizeof( DSBUFFERDESC ) );
- bufferDescription.dwSize = sizeof( DSBUFFERDESC );
- bufferDescription.dwFlags = ( DSBCAPS_STICKYFOCUS |
- DSBCAPS_GLOBALFOCUS |
- DSBCAPS_GETCURRENTPOSITION2 |
- DSBCAPS_LOCHARDWARE ); // Force hardware mixing
- bufferDescription.dwBufferBytes = dsBufferSize;
- bufferDescription.lpwfxFormat = &waveFormat;
-
- // Try to create the secondary DS buffer. If that doesn't work,
- // try to use software mixing. Otherwise, there's a problem.
- result = output->CreateSoundBuffer( &bufferDescription, &buffer, NULL );
- if ( FAILED( result ) ) {
- bufferDescription.dwFlags = ( DSBCAPS_STICKYFOCUS |
- DSBCAPS_GLOBALFOCUS |
- DSBCAPS_GETCURRENTPOSITION2 |
- DSBCAPS_LOCSOFTWARE ); // Force software mixing
- result = output->CreateSoundBuffer( &bufferDescription, &buffer, NULL );
- if ( FAILED( result ) ) {
- output->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") creating secondary buffer (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
-
- // Get the buffer size ... might be different from what we specified.
- DSBCAPS dsbcaps;
- dsbcaps.dwSize = sizeof( DSBCAPS );
- result = buffer->GetCaps( &dsbcaps );
- if ( FAILED( result ) ) {
- output->Release();
- buffer->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") getting buffer settings (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- dsBufferSize = dsbcaps.dwBufferBytes;
-
- // Lock the DS buffer
- LPVOID audioPtr;
- DWORD dataLen;
- result = buffer->Lock( 0, dsBufferSize, &audioPtr, &dataLen, NULL, NULL, 0 );
- if ( FAILED( result ) ) {
- output->Release();
- buffer->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") locking buffer (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Zero the DS buffer
- ZeroMemory( audioPtr, dataLen );
-
- // Unlock the DS buffer
- result = buffer->Unlock( audioPtr, dataLen, NULL, 0 );
- if ( FAILED( result ) ) {
- output->Release();
- buffer->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") unlocking buffer (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- ohandle = (void *) output;
- bhandle = (void *) buffer;
- }
-
- if ( mode == INPUT ) {
-
- LPDIRECTSOUNDCAPTURE input;
- result = DirectSoundCaptureCreate( dsDevices[ device ].id[1], &input, NULL );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") opening input device (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- DSCCAPS inCaps;
- inCaps.dwSize = sizeof( inCaps );
- result = input->GetCaps( &inCaps );
- if ( FAILED( result ) ) {
- input->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") getting input capabilities (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Check channel information.
- if ( inCaps.dwChannels < channels + firstChannel ) {
- errorText_ = "RtApiDs::getDeviceInfo: the input device does not support requested input channels.";
- return FAILURE;
- }
-
- // Check format information. Use 16-bit format unless user
- // requests 8-bit.
- DWORD deviceFormats;
- if ( channels + firstChannel == 2 ) {
- deviceFormats = WAVE_FORMAT_1S08 | WAVE_FORMAT_2S08 | WAVE_FORMAT_4S08 | WAVE_FORMAT_96S08;
- if ( format == RTAUDIO_SINT8 && inCaps.dwFormats & deviceFormats ) {
- waveFormat.wBitsPerSample = 8;
- stream_.deviceFormat[mode] = RTAUDIO_SINT8;
- }
- else { // assume 16-bit is supported
- waveFormat.wBitsPerSample = 16;
- stream_.deviceFormat[mode] = RTAUDIO_SINT16;
- }
- }
- else { // channel == 1
- deviceFormats = WAVE_FORMAT_1M08 | WAVE_FORMAT_2M08 | WAVE_FORMAT_4M08 | WAVE_FORMAT_96M08;
- if ( format == RTAUDIO_SINT8 && inCaps.dwFormats & deviceFormats ) {
- waveFormat.wBitsPerSample = 8;
- stream_.deviceFormat[mode] = RTAUDIO_SINT8;
- }
- else { // assume 16-bit is supported
- waveFormat.wBitsPerSample = 16;
- stream_.deviceFormat[mode] = RTAUDIO_SINT16;
- }
- }
- stream_.userFormat = format;
-
- // Update wave format structure and buffer information.
- waveFormat.nBlockAlign = waveFormat.nChannels * waveFormat.wBitsPerSample / 8;
- waveFormat.nAvgBytesPerSec = waveFormat.nSamplesPerSec * waveFormat.nBlockAlign;
- dsPointerLeadTime = nBuffers * (*bufferSize) * (waveFormat.wBitsPerSample / 8) * channels;
-
- // If the user wants an even bigger buffer, increase the device buffer size accordingly.
- while ( dsPointerLeadTime * 2U > dsBufferSize )
- dsBufferSize *= 2;
-
- // Setup the secondary DS buffer description.
- DSCBUFFERDESC bufferDescription;
- ZeroMemory( &bufferDescription, sizeof( DSCBUFFERDESC ) );
- bufferDescription.dwSize = sizeof( DSCBUFFERDESC );
- bufferDescription.dwFlags = 0;
- bufferDescription.dwReserved = 0;
- bufferDescription.dwBufferBytes = dsBufferSize;
- bufferDescription.lpwfxFormat = &waveFormat;
-
- // Create the capture buffer.
- LPDIRECTSOUNDCAPTUREBUFFER buffer;
- result = input->CreateCaptureBuffer( &bufferDescription, &buffer, NULL );
- if ( FAILED( result ) ) {
- input->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") creating input buffer (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Get the buffer size ... might be different from what we specified.
- DSCBCAPS dscbcaps;
- dscbcaps.dwSize = sizeof( DSCBCAPS );
- result = buffer->GetCaps( &dscbcaps );
- if ( FAILED( result ) ) {
- input->Release();
- buffer->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") getting buffer settings (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- dsBufferSize = dscbcaps.dwBufferBytes;
-
- // NOTE: We could have a problem here if this is a duplex stream
- // and the play and capture hardware buffer sizes are different
- // (I'm actually not sure if that is a problem or not).
- // Currently, we are not verifying that.
-
- // Lock the capture buffer
- LPVOID audioPtr;
- DWORD dataLen;
- result = buffer->Lock( 0, dsBufferSize, &audioPtr, &dataLen, NULL, NULL, 0 );
- if ( FAILED( result ) ) {
- input->Release();
- buffer->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") locking input buffer (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Zero the buffer
- ZeroMemory( audioPtr, dataLen );
-
- // Unlock the buffer
- result = buffer->Unlock( audioPtr, dataLen, NULL, 0 );
- if ( FAILED( result ) ) {
- input->Release();
- buffer->Release();
- errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") unlocking input buffer (" << dsDevices[ device ].name << ")!";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- ohandle = (void *) input;
- bhandle = (void *) buffer;
- }
-
- // Set various stream parameters
- DsHandle *handle = 0;
- stream_.nDeviceChannels[mode] = channels + firstChannel;
- stream_.nUserChannels[mode] = channels;
- stream_.bufferSize = *bufferSize;
- stream_.channelOffset[mode] = firstChannel;
- stream_.deviceInterleaved[mode] = true;
- if ( options && options->flags & RTAUDIO_NONINTERLEAVED ) stream_.userInterleaved = false;
- else stream_.userInterleaved = true;
-
- // Set flag for buffer conversion
- stream_.doConvertBuffer[mode] = false;
- if (stream_.nUserChannels[mode] != stream_.nDeviceChannels[mode])
- stream_.doConvertBuffer[mode] = true;
- if (stream_.userFormat != stream_.deviceFormat[mode])
- stream_.doConvertBuffer[mode] = true;
- if ( stream_.userInterleaved != stream_.deviceInterleaved[mode] &&
- stream_.nUserChannels[mode] > 1 )
- stream_.doConvertBuffer[mode] = true;
-
- // Allocate necessary internal buffers
- long bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );
- stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );
- if ( stream_.userBuffer[mode] == NULL ) {
- errorText_ = "RtApiDs::probeDeviceOpen: error allocating user buffer memory.";
- goto error;
- }
-
- if ( stream_.doConvertBuffer[mode] ) {
-
- bool makeBuffer = true;
- bufferBytes = stream_.nDeviceChannels[mode] * formatBytes( stream_.deviceFormat[mode] );
- if ( mode == INPUT ) {
- if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {
- unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );
- if ( bufferBytes <= (long) bytesOut ) makeBuffer = false;
- }
- }
-
- if ( makeBuffer ) {
- bufferBytes *= *bufferSize;
- if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );
- stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );
- if ( stream_.deviceBuffer == NULL ) {
- errorText_ = "RtApiDs::probeDeviceOpen: error allocating device buffer memory.";
- goto error;
- }
- }
- }
-
- // Allocate our DsHandle structures for the stream.
- if ( stream_.apiHandle == 0 ) {
- try {
- handle = new DsHandle;
- }
- catch ( std::bad_alloc& ) {
- errorText_ = "RtApiDs::probeDeviceOpen: error allocating AsioHandle memory.";
- goto error;
- }
-
- // Create a manual-reset event.
- handle->condition = CreateEvent( NULL, // no security
- TRUE, // manual-reset
- FALSE, // non-signaled initially
- NULL ); // unnamed
- stream_.apiHandle = (void *) handle;
- }
- else
- handle = (DsHandle *) stream_.apiHandle;
- handle->id[mode] = ohandle;
- handle->buffer[mode] = bhandle;
- handle->dsBufferSize[mode] = dsBufferSize;
- handle->dsPointerLeadTime[mode] = dsPointerLeadTime;
-
- stream_.device[mode] = device;
- stream_.state = STREAM_STOPPED;
- if ( stream_.mode == OUTPUT && mode == INPUT )
- // We had already set up an output stream.
- stream_.mode = DUPLEX;
- else
- stream_.mode = mode;
- stream_.nBuffers = nBuffers;
- stream_.sampleRate = sampleRate;
-
- // Setup the buffer conversion information structure.
- if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, firstChannel );
-
- // Setup the callback thread.
- unsigned threadId;
- stream_.callbackInfo.object = (void *) this;
- stream_.callbackInfo.isRunning = true;
- stream_.callbackInfo.thread = _beginthreadex( NULL, 0, &callbackHandler,
- &stream_.callbackInfo, 0, &threadId );
- if ( stream_.callbackInfo.thread == 0 ) {
- errorText_ = "RtApiDs::probeDeviceOpen: error creating callback thread!";
- goto error;
- }
-
- // Boost DS thread priority
- SetThreadPriority( (HANDLE) stream_.callbackInfo.thread, THREAD_PRIORITY_HIGHEST );
- return SUCCESS;
-
- error:
- if ( handle ) {
- if ( handle->buffer[0] ) { // the object pointer can be NULL and valid
- LPDIRECTSOUND object = (LPDIRECTSOUND) handle->id[0];
- LPDIRECTSOUNDBUFFER buffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];
- if ( buffer ) buffer->Release();
- object->Release();
- }
- if ( handle->buffer[1] ) {
- LPDIRECTSOUNDCAPTURE object = (LPDIRECTSOUNDCAPTURE) handle->id[1];
- LPDIRECTSOUNDCAPTUREBUFFER buffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];
- if ( buffer ) buffer->Release();
- object->Release();
- }
- CloseHandle( handle->condition );
- delete handle;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- return FAILURE;
-}
-
-void RtApiDs :: closeStream()
-{
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiDs::closeStream(): no open stream to close!";
- error( RtError::WARNING );
- return;
- }
-
- // Stop the callback thread.
- stream_.callbackInfo.isRunning = false;
- WaitForSingleObject( (HANDLE) stream_.callbackInfo.thread, INFINITE );
- CloseHandle( (HANDLE) stream_.callbackInfo.thread );
-
- DsHandle *handle = (DsHandle *) stream_.apiHandle;
- if ( handle ) {
- if ( handle->buffer[0] ) { // the object pointer can be NULL and valid
- LPDIRECTSOUND object = (LPDIRECTSOUND) handle->id[0];
- LPDIRECTSOUNDBUFFER buffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];
- if ( buffer ) {
- buffer->Stop();
- buffer->Release();
- }
- object->Release();
- }
- if ( handle->buffer[1] ) {
- LPDIRECTSOUNDCAPTURE object = (LPDIRECTSOUNDCAPTURE) handle->id[1];
- LPDIRECTSOUNDCAPTUREBUFFER buffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];
- if ( buffer ) {
- buffer->Stop();
- buffer->Release();
- }
- object->Release();
- }
- CloseHandle( handle->condition );
- delete handle;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- stream_.mode = UNINITIALIZED;
- stream_.state = STREAM_CLOSED;
-}
-
-void RtApiDs :: startStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_RUNNING ) {
- errorText_ = "RtApiDs::startStream(): the stream is already running!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- DsHandle *handle = (DsHandle *) stream_.apiHandle;
-
- // Increase scheduler frequency on lesser windows (a side-effect of
- // increasing timer accuracy). On greater windows (Win2K or later),
- // this is already in effect.
- timeBeginPeriod( 1 );
-
- buffersRolling = false;
- duplexPrerollBytes = 0;
-
- if ( stream_.mode == DUPLEX ) {
- // 0.5 seconds of silence in DUPLEX mode while the devices spin up and synchronize.
- duplexPrerollBytes = (int) ( 0.5 * stream_.sampleRate * formatBytes( stream_.deviceFormat[1] ) * stream_.nDeviceChannels[1] );
- }
-
- HRESULT result = 0;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
-
- LPDIRECTSOUNDBUFFER buffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];
- result = buffer->Play( 0, 0, DSBPLAY_LOOPING );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::startStream: error (" << getErrorString( result ) << ") starting output buffer!";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {
-
- LPDIRECTSOUNDCAPTUREBUFFER buffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];
- result = buffer->Start( DSCBSTART_LOOPING );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::startStream: error (" << getErrorString( result ) << ") starting input buffer!";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- handle->drainCounter = 0;
- handle->internalDrain = false;
- stream_.state = STREAM_RUNNING;
-
- unlock:
- MUTEX_UNLOCK( &stream_.mutex );
-
- if ( FAILED( result ) ) error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiDs :: stopStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiDs::stopStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
-
- HRESULT result = 0;
- LPVOID audioPtr;
- DWORD dataLen;
- DsHandle *handle = (DsHandle *) stream_.apiHandle;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
- if ( handle->drainCounter == 0 ) {
- handle->drainCounter = 1;
- MUTEX_UNLOCK( &stream_.mutex );
- WaitForMultipleObjects( 1, &handle->condition, FALSE, INFINITE ); // block until signaled
- ResetEvent( handle->condition );
- MUTEX_LOCK( &stream_.mutex );
- }
-
- // Stop the buffer and clear memory
- LPDIRECTSOUNDBUFFER buffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];
- result = buffer->Stop();
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") stopping output buffer!";
- errorText_ = errorStream_.str();
- goto unlock;
- }
-
- // Lock the buffer and clear it so that if we start to play again,
- // we won't have old data playing.
- result = buffer->Lock( 0, handle->dsBufferSize[0], &audioPtr, &dataLen, NULL, NULL, 0 );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") locking output buffer!";
- errorText_ = errorStream_.str();
- goto unlock;
- }
-
- // Zero the DS buffer
- ZeroMemory( audioPtr, dataLen );
-
- // Unlock the DS buffer
- result = buffer->Unlock( audioPtr, dataLen, NULL, 0 );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") unlocking output buffer!";
- errorText_ = errorStream_.str();
- goto unlock;
- }
-
- // If we start playing again, we must begin at beginning of buffer.
- handle->bufferPointer[0] = 0;
- }
-
- if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {
- LPDIRECTSOUNDCAPTUREBUFFER buffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];
- audioPtr = NULL;
- dataLen = 0;
-
- result = buffer->Stop();
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") stopping input buffer!";
- errorText_ = errorStream_.str();
- goto unlock;
- }
-
- // Lock the buffer and clear it so that if we start to play again,
- // we won't have old data playing.
- result = buffer->Lock( 0, handle->dsBufferSize[1], &audioPtr, &dataLen, NULL, NULL, 0 );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") locking input buffer!";
- errorText_ = errorStream_.str();
- goto unlock;
- }
-
- // Zero the DS buffer
- ZeroMemory( audioPtr, dataLen );
-
- // Unlock the DS buffer
- result = buffer->Unlock( audioPtr, dataLen, NULL, 0 );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") unlocking input buffer!";
- errorText_ = errorStream_.str();
- goto unlock;
- }
-
- // If we start recording again, we must begin at beginning of buffer.
- handle->bufferPointer[1] = 0;
- }
-
- unlock:
- timeEndPeriod( 1 ); // revert to normal scheduler frequency on lesser windows.
- stream_.state = STREAM_STOPPED;
- MUTEX_UNLOCK( &stream_.mutex );
-
- if ( FAILED( result ) ) error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiDs :: abortStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiDs::abortStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- DsHandle *handle = (DsHandle *) stream_.apiHandle;
- handle->drainCounter = 1;
-
- stopStream();
-}
-
-void RtApiDs :: callbackEvent()
-{
- if ( stream_.state == STREAM_STOPPED ) {
- Sleep( 50 ); // sleep 50 milliseconds
- return;
- }
-
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiDs::callbackEvent(): the stream is closed ... this shouldn't happen!";
- error( RtError::WARNING );
- return;
- }
-
- CallbackInfo *info = (CallbackInfo *) &stream_.callbackInfo;
- DsHandle *handle = (DsHandle *) stream_.apiHandle;
-
- // Check if we were draining the stream and signal is finished.
- if ( handle->drainCounter > stream_.nBuffers + 2 ) {
- if ( handle->internalDrain == false )
- SetEvent( handle->condition );
- else
- stopStream();
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- // The state might change while waiting on a mutex.
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
-
- // Invoke user callback to get fresh output data UNLESS we are
- // draining stream.
- if ( handle->drainCounter == 0 ) {
- RtAudioCallback callback = (RtAudioCallback) info->callback;
- double streamTime = getStreamTime();
- RtAudioStreamStatus status = 0;
- if ( stream_.mode != INPUT && handle->xrun[0] == true ) {
- status |= RTAUDIO_OUTPUT_UNDERFLOW;
- handle->xrun[0] = false;
- }
- if ( stream_.mode != OUTPUT && handle->xrun[1] == true ) {
- status |= RTAUDIO_INPUT_OVERFLOW;
- handle->xrun[1] = false;
- }
- handle->drainCounter = callback( stream_.userBuffer[0], stream_.userBuffer[1],
- stream_.bufferSize, streamTime, status, info->userData );
- if ( handle->drainCounter == 2 ) {
- MUTEX_UNLOCK( &stream_.mutex );
- abortStream();
- return;
- }
- else if ( handle->drainCounter == 1 )
- handle->internalDrain = true;
- }
-
- HRESULT result;
- DWORD currentWritePointer, safeWritePointer;
- DWORD currentReadPointer, safeReadPointer;
- UINT nextWritePointer;
-
- LPVOID buffer1 = NULL;
- LPVOID buffer2 = NULL;
- DWORD bufferSize1 = 0;
- DWORD bufferSize2 = 0;
-
- char *buffer;
- long bufferBytes;
-
- if ( buffersRolling == false ) {
- if ( stream_.mode == DUPLEX ) {
- //assert( handle->dsBufferSize[0] == handle->dsBufferSize[1] );
-
- // It takes a while for the devices to get rolling. As a result,
- // there's no guarantee that the capture and write device pointers
- // will move in lockstep. Wait here for both devices to start
- // rolling, and then set our buffer pointers accordingly.
- // e.g. Crystal Drivers: the capture buffer starts up 5700 to 9600
- // bytes later than the write buffer.
-
- // Stub: a serious risk of having a pre-emptive scheduling round
- // take place between the two GetCurrentPosition calls... but I'm
- // really not sure how to solve the problem. Temporarily boost to
- // Realtime priority, maybe; but I'm not sure what priority the
- // DirectSound service threads run at. We *should* be roughly
- // within a ms or so of correct.
-
- LPDIRECTSOUNDBUFFER dsWriteBuffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];
- LPDIRECTSOUNDCAPTUREBUFFER dsCaptureBuffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];
-
- DWORD startSafeWritePointer, startSafeReadPointer;
-
- result = dsWriteBuffer->GetCurrentPosition( NULL, &startSafeWritePointer );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current write position!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
- result = dsCaptureBuffer->GetCurrentPosition( NULL, &startSafeReadPointer );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current read position!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
- while ( true ) {
- result = dsWriteBuffer->GetCurrentPosition( NULL, &safeWritePointer );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current write position!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
- result = dsCaptureBuffer->GetCurrentPosition( NULL, &safeReadPointer );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current read position!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
- if ( safeWritePointer != startSafeWritePointer && safeReadPointer != startSafeReadPointer ) break;
- Sleep( 1 );
- }
-
- //assert( handle->dsBufferSize[0] == handle->dsBufferSize[1] );
-
- handle->bufferPointer[0] = safeWritePointer + handle->dsPointerLeadTime[0];
- if ( handle->bufferPointer[0] >= handle->dsBufferSize[0] ) handle->bufferPointer[0] -= handle->dsBufferSize[0];
- handle->bufferPointer[1] = safeReadPointer;
- }
- else if ( stream_.mode == OUTPUT ) {
-
- // Set the proper nextWritePosition after initial startup.
- LPDIRECTSOUNDBUFFER dsWriteBuffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];
- result = dsWriteBuffer->GetCurrentPosition( ¤tWritePointer, &safeWritePointer );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current write position!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
- handle->bufferPointer[0] = safeWritePointer + handle->dsPointerLeadTime[0];
- if ( handle->bufferPointer[0] >= handle->dsBufferSize[0] ) handle->bufferPointer[0] -= handle->dsBufferSize[0];
- }
-
- buffersRolling = true;
- }
-
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
-
- LPDIRECTSOUNDBUFFER dsBuffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];
-
- if ( handle->drainCounter > 1 ) { // write zeros to the output stream
- bufferBytes = stream_.bufferSize * stream_.nUserChannels[0];
- bufferBytes *= formatBytes( stream_.userFormat );
- memset( stream_.userBuffer[0], 0, bufferBytes );
- }
-
- // Setup parameters and do buffer conversion if necessary.
- if ( stream_.doConvertBuffer[0] ) {
- buffer = stream_.deviceBuffer;
- convertBuffer( buffer, stream_.userBuffer[0], stream_.convertInfo[0] );
- bufferBytes = stream_.bufferSize * stream_.nDeviceChannels[0];
- bufferBytes *= formatBytes( stream_.deviceFormat[0] );
- }
- else {
- buffer = stream_.userBuffer[0];
- bufferBytes = stream_.bufferSize * stream_.nUserChannels[0];
- bufferBytes *= formatBytes( stream_.userFormat );
- }
-
- // No byte swapping necessary in DirectSound implementation.
-
- // Ahhh ... windoze. 16-bit data is signed but 8-bit data is
- // unsigned. So, we need to convert our signed 8-bit data here to
- // unsigned.
- if ( stream_.deviceFormat[0] == RTAUDIO_SINT8 )
- for ( int i=0; i<bufferBytes; i++ ) buffer[i] = (unsigned char) ( buffer[i] + 128 );
-
- DWORD dsBufferSize = handle->dsBufferSize[0];
- nextWritePointer = handle->bufferPointer[0];
-
- DWORD endWrite, leadPointer;
- while ( true ) {
- // Find out where the read and "safe write" pointers are.
- result = dsBuffer->GetCurrentPosition( ¤tWritePointer, &safeWritePointer );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current write position!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
-
- // We will copy our output buffer into the region between
- // safeWritePointer and leadPointer. If leadPointer is not
- // beyond the next endWrite position, wait until it is.
- leadPointer = safeWritePointer + handle->dsPointerLeadTime[0];
- //std::cout << "safeWritePointer = " << safeWritePointer << ", leadPointer = " << leadPointer << ", nextWritePointer = " << nextWritePointer << std::endl;
- if ( leadPointer > dsBufferSize ) leadPointer -= dsBufferSize;
- if ( leadPointer < nextWritePointer ) leadPointer += dsBufferSize; // unwrap offset
- endWrite = nextWritePointer + bufferBytes;
-
- // Check whether the entire write region is behind the play pointer.
- if ( leadPointer >= endWrite ) break;
-
- // If we are here, then we must wait until the leadPointer advances
- // beyond the end of our next write region. We use the
- // Sleep() function to suspend operation until that happens.
- double millis = ( endWrite - leadPointer ) * 1000.0;
- millis /= ( formatBytes( stream_.deviceFormat[0]) * stream_.nDeviceChannels[0] * stream_.sampleRate);
- if ( millis < 1.0 ) millis = 1.0;
- Sleep( (DWORD) millis );
- }
-
- if ( dsPointerBetween( nextWritePointer, safeWritePointer, currentWritePointer, dsBufferSize )
- || dsPointerBetween( endWrite, safeWritePointer, currentWritePointer, dsBufferSize ) ) {
- // We've strayed into the forbidden zone ... resync the read pointer.
- handle->xrun[0] = true;
- nextWritePointer = safeWritePointer + handle->dsPointerLeadTime[0] - bufferBytes;
- if ( nextWritePointer >= dsBufferSize ) nextWritePointer -= dsBufferSize;
- handle->bufferPointer[0] = nextWritePointer;
- endWrite = nextWritePointer + bufferBytes;
- }
-
- // Lock free space in the buffer
- result = dsBuffer->Lock( nextWritePointer, bufferBytes, &buffer1,
- &bufferSize1, &buffer2, &bufferSize2, 0 );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") locking buffer during playback!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
-
- // Copy our buffer into the DS buffer
- CopyMemory( buffer1, buffer, bufferSize1 );
- if ( buffer2 != NULL ) CopyMemory( buffer2, buffer+bufferSize1, bufferSize2 );
-
- // Update our buffer offset and unlock sound buffer
- dsBuffer->Unlock( buffer1, bufferSize1, buffer2, bufferSize2 );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") unlocking buffer during playback!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
- nextWritePointer = ( nextWritePointer + bufferSize1 + bufferSize2 ) % dsBufferSize;
- handle->bufferPointer[0] = nextWritePointer;
-
- if ( handle->drainCounter ) {
- handle->drainCounter++;
- goto unlock;
- }
- }
-
- if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {
-
- // Setup parameters.
- if ( stream_.doConvertBuffer[1] ) {
- buffer = stream_.deviceBuffer;
- bufferBytes = stream_.bufferSize * stream_.nDeviceChannels[1];
- bufferBytes *= formatBytes( stream_.deviceFormat[1] );
- }
- else {
- buffer = stream_.userBuffer[1];
- bufferBytes = stream_.bufferSize * stream_.nUserChannels[1];
- bufferBytes *= formatBytes( stream_.userFormat );
- }
-
- LPDIRECTSOUNDCAPTUREBUFFER dsBuffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];
- long nextReadPointer = handle->bufferPointer[1];
- DWORD dsBufferSize = handle->dsBufferSize[1];
-
- // Find out where the write and "safe read" pointers are.
- result = dsBuffer->GetCurrentPosition( ¤tReadPointer, &safeReadPointer );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current read position!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
-
- if ( safeReadPointer < (DWORD)nextReadPointer ) safeReadPointer += dsBufferSize; // unwrap offset
- DWORD endRead = nextReadPointer + bufferBytes;
-
- // Handling depends on whether we are INPUT or DUPLEX.
- // If we're in INPUT mode then waiting is a good thing. If we're in DUPLEX mode,
- // then a wait here will drag the write pointers into the forbidden zone.
- //
- // In DUPLEX mode, rather than wait, we will back off the read pointer until
- // it's in a safe position. This causes dropouts, but it seems to be the only
- // practical way to sync up the read and write pointers reliably, given the
- // the very complex relationship between phase and increment of the read and write
- // pointers.
- //
- // In order to minimize audible dropouts in DUPLEX mode, we will
- // provide a pre-roll period of 0.5 seconds in which we return
- // zeros from the read buffer while the pointers sync up.
-
- if ( stream_.mode == DUPLEX ) {
- if ( safeReadPointer < endRead ) {
- if ( duplexPrerollBytes <= 0 ) {
- // Pre-roll time over. Be more agressive.
- int adjustment = endRead-safeReadPointer;
-
- handle->xrun[1] = true;
- // Two cases:
- // - large adjustments: we've probably run out of CPU cycles, so just resync exactly,
- // and perform fine adjustments later.
- // - small adjustments: back off by twice as much.
- if ( adjustment >= 2*bufferBytes )
- nextReadPointer = safeReadPointer-2*bufferBytes;
- else
- nextReadPointer = safeReadPointer-bufferBytes-adjustment;
-
- if ( nextReadPointer < 0 ) nextReadPointer += dsBufferSize;
-
- }
- else {
- // In pre=roll time. Just do it.
- nextReadPointer = safeReadPointer - bufferBytes;
- while ( nextReadPointer < 0 ) nextReadPointer += dsBufferSize;
- }
- endRead = nextReadPointer + bufferBytes;
- }
- }
- else { // mode == INPUT
- while ( safeReadPointer < endRead ) {
- // See comments for playback.
- double millis = (endRead - safeReadPointer) * 1000.0;
- millis /= ( formatBytes(stream_.deviceFormat[1]) * stream_.nDeviceChannels[1] * stream_.sampleRate);
- if ( millis < 1.0 ) millis = 1.0;
- Sleep( (DWORD) millis );
-
- // Wake up and find out where we are now.
- result = dsBuffer->GetCurrentPosition( ¤tReadPointer, &safeReadPointer );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current read position!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
-
- if ( safeReadPointer < (DWORD)nextReadPointer ) safeReadPointer += dsBufferSize; // unwrap offset
- }
- }
-
- // Lock free space in the buffer
- result = dsBuffer->Lock( nextReadPointer, bufferBytes, &buffer1,
- &bufferSize1, &buffer2, &bufferSize2, 0 );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") locking capture buffer!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
-
- if ( duplexPrerollBytes <= 0 ) {
- // Copy our buffer into the DS buffer
- CopyMemory( buffer, buffer1, bufferSize1 );
- if ( buffer2 != NULL ) CopyMemory( buffer+bufferSize1, buffer2, bufferSize2 );
- }
- else {
- memset( buffer, 0, bufferSize1 );
- if ( buffer2 != NULL ) memset( buffer + bufferSize1, 0, bufferSize2 );
- duplexPrerollBytes -= bufferSize1 + bufferSize2;
- }
-
- // Update our buffer offset and unlock sound buffer
- nextReadPointer = ( nextReadPointer + bufferSize1 + bufferSize2 ) % dsBufferSize;
- dsBuffer->Unlock( buffer1, bufferSize1, buffer2, bufferSize2 );
- if ( FAILED( result ) ) {
- errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") unlocking capture buffer!";
- errorText_ = errorStream_.str();
- error( RtError::SYSTEM_ERROR );
- }
- handle->bufferPointer[1] = nextReadPointer;
-
- // No byte swapping necessary in DirectSound implementation.
-
- // If necessary, convert 8-bit data from unsigned to signed.
- if ( stream_.deviceFormat[1] == RTAUDIO_SINT8 )
- for ( int j=0; j<bufferBytes; j++ ) buffer[j] = (signed char) ( buffer[j] - 128 );
-
- // Do buffer conversion if necessary.
- if ( stream_.doConvertBuffer[1] )
- convertBuffer( stream_.userBuffer[1], stream_.deviceBuffer, stream_.convertInfo[1] );
- }
-
- unlock:
- MUTEX_UNLOCK( &stream_.mutex );
-
- RtApi::tickStreamTime();
-}
-
-// Definitions for utility functions and callbacks
-// specific to the DirectSound implementation.
-
-extern "C" unsigned __stdcall callbackHandler( void *ptr )
-{
- CallbackInfo *info = (CallbackInfo *) ptr;
- RtApiDs *object = (RtApiDs *) info->object;
- bool* isRunning = &info->isRunning;
-
- while ( *isRunning == true ) {
- object->callbackEvent();
- }
-
- _endthreadex( 0 );
- return 0;
-}
-
-#include "tchar.h"
-
-std::string convertTChar( LPCTSTR name )
-{
- std::string s;
-
-#if defined( UNICODE ) || defined( _UNICODE )
- // Yes, this conversion doesn't make sense for two-byte characters
- // but RtAudio is currently written to return an std::string of
- // one-byte chars for the device name.
- for ( unsigned int i=0; i<wcslen( name ); i++ )
- s.push_back( name[i] );
-#else
- s.append( std::string( name ) );
-#endif
-
- return s;
-}
-
-static BOOL CALLBACK deviceQueryCallback( LPGUID lpguid,
- LPCTSTR description,
- LPCTSTR module,
- LPVOID lpContext )
-{
- bool *isInput = (bool *) lpContext;
-
- HRESULT hr;
- bool validDevice = false;
- if ( *isInput == true ) {
- DSCCAPS caps;
- LPDIRECTSOUNDCAPTURE object;
-
- hr = DirectSoundCaptureCreate( lpguid, &object, NULL );
- if ( hr != DS_OK ) return TRUE;
-
- caps.dwSize = sizeof(caps);
- hr = object->GetCaps( &caps );
- if ( hr == DS_OK ) {
- if ( caps.dwChannels > 0 && caps.dwFormats > 0 )
- validDevice = true;
- }
- object->Release();
- }
- else {
- DSCAPS caps;
- LPDIRECTSOUND object;
- hr = DirectSoundCreate( lpguid, &object, NULL );
- if ( hr != DS_OK ) return TRUE;
-
- caps.dwSize = sizeof(caps);
- hr = object->GetCaps( &caps );
- if ( hr == DS_OK ) {
- if ( caps.dwFlags & DSCAPS_PRIMARYMONO || caps.dwFlags & DSCAPS_PRIMARYSTEREO )
- validDevice = true;
- }
- object->Release();
- }
-
- // If good device, then save its name and guid.
- std::string name = convertTChar( description );
- if ( name == "Primary Sound Driver" || name == "Primary Sound Capture Driver" )
- name = "Default Device";
- if ( validDevice ) {
- for ( unsigned int i=0; i<dsDevices.size(); i++ ) {
- if ( dsDevices[i].name == name ) {
- dsDevices[i].found = true;
- if ( *isInput ) {
- dsDevices[i].id[1] = lpguid;
- dsDevices[i].validId[1] = true;
- }
- else {
- dsDevices[i].id[0] = lpguid;
- dsDevices[i].validId[0] = true;
- }
- return TRUE;
- }
- }
-
- DsDevice device;
- device.name = name;
- device.found = true;
- if ( *isInput ) {
- device.id[1] = lpguid;
- device.validId[1] = true;
- }
- else {
- device.id[0] = lpguid;
- device.validId[0] = true;
- }
- dsDevices.push_back( device );
- }
-
- return TRUE;
-}
-
-static const char* getErrorString( int code )
-{
- switch ( code ) {
-
- case DSERR_ALLOCATED:
- return "Already allocated";
-
- case DSERR_CONTROLUNAVAIL:
- return "Control unavailable";
-
- case DSERR_INVALIDPARAM:
- return "Invalid parameter";
-
- case DSERR_INVALIDCALL:
- return "Invalid call";
-
- case DSERR_GENERIC:
- return "Generic error";
-
- case DSERR_PRIOLEVELNEEDED:
- return "Priority level needed";
-
- case DSERR_OUTOFMEMORY:
- return "Out of memory";
-
- case DSERR_BADFORMAT:
- return "The sample rate or the channel format is not supported";
-
- case DSERR_UNSUPPORTED:
- return "Not supported";
-
- case DSERR_NODRIVER:
- return "No driver";
-
- case DSERR_ALREADYINITIALIZED:
- return "Already initialized";
-
- case DSERR_NOAGGREGATION:
- return "No aggregation";
-
- case DSERR_BUFFERLOST:
- return "Buffer lost";
-
- case DSERR_OTHERAPPHASPRIO:
- return "Another application already has priority";
-
- case DSERR_UNINITIALIZED:
- return "Uninitialized";
-
- default:
- return "DirectSound unknown error";
- }
-}
-//******************** End of __WINDOWS_DS__ *********************//
-#endif
-
-
-#if defined(__LINUX_ALSA__)
-
-#include <alsa/asoundlib.h>
-#include <unistd.h>
-
- // A structure to hold various information related to the ALSA API
- // implementation.
-struct AlsaHandle {
- snd_pcm_t *handles[2];
- bool synchronized;
- bool xrun[2];
- pthread_cond_t runnable;
-
- AlsaHandle()
- :synchronized(false) { xrun[0] = false; xrun[1] = false; }
-};
-
-extern "C" void *alsaCallbackHandler( void * ptr );
-
-RtApiAlsa :: RtApiAlsa()
-{
- // Nothing to do here.
-}
-
-RtApiAlsa :: ~RtApiAlsa()
-{
- if ( stream_.state != STREAM_CLOSED ) closeStream();
-}
-
-unsigned int RtApiAlsa :: getDeviceCount( void )
-{
- unsigned nDevices = 0;
- int result, subdevice, card;
- char name[64];
- snd_ctl_t *handle;
-
- // Count cards and devices
- card = -1;
- snd_card_next( &card );
- while ( card >= 0 ) {
- sprintf( name, "hw:%d", card );
- result = snd_ctl_open( &handle, name, 0 );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::getDeviceCount: control open, card = " << card << ", " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- goto nextcard;
- }
- subdevice = -1;
- while( 1 ) {
- result = snd_ctl_pcm_next_device( handle, &subdevice );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::getDeviceCount: control next device, card = " << card << ", " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- break;
- }
- if ( subdevice < 0 )
- break;
- nDevices++;
- }
- nextcard:
- snd_ctl_close( handle );
- snd_card_next( &card );
- }
-
- return nDevices;
-}
-
-RtAudio::DeviceInfo RtApiAlsa :: getDeviceInfo( unsigned int device )
-{
- RtAudio::DeviceInfo info;
- info.probed = false;
-
- unsigned nDevices = 0;
- int result, subdevice, card;
- char name[64];
- snd_ctl_t *chandle;
-
- // Count cards and devices
- card = -1;
- snd_card_next( &card );
- while ( card >= 0 ) {
- sprintf( name, "hw:%d", card );
- result = snd_ctl_open( &chandle, name, SND_CTL_NONBLOCK );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::getDeviceInfo: control open, card = " << card << ", " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- goto nextcard;
- }
- subdevice = -1;
- while( 1 ) {
- result = snd_ctl_pcm_next_device( chandle, &subdevice );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::getDeviceInfo: control next device, card = " << card << ", " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- break;
- }
- if ( subdevice < 0 ) break;
- if ( nDevices == device ) {
- sprintf( name, "hw:%d,%d", card, subdevice );
- goto foundDevice;
- }
- nDevices++;
- }
- nextcard:
- snd_ctl_close( chandle );
- snd_card_next( &card );
- }
-
- if ( nDevices == 0 ) {
- errorText_ = "RtApiAlsa::getDeviceInfo: no devices found!";
- error( RtError::INVALID_USE );
- }
-
- if ( device >= nDevices ) {
- errorText_ = "RtApiAlsa::getDeviceInfo: device ID is invalid!";
- error( RtError::INVALID_USE );
- }
-
- foundDevice:
-
- // If a stream is already open, we cannot probe the stream devices.
- // Thus, use the saved results.
- if ( stream_.state != STREAM_CLOSED &&
- ( stream_.device[0] == device || stream_.device[1] == device ) ) {
- if ( device >= devices_.size() ) {
- errorText_ = "RtApiAlsa::getDeviceInfo: device ID was not present before stream was opened.";
- error( RtError::WARNING );
- return info;
- }
- return devices_[ device ];
- }
-
- int openMode = SND_PCM_ASYNC;
- snd_pcm_stream_t stream;
- snd_pcm_info_t *pcminfo;
- snd_pcm_info_alloca( &pcminfo );
- snd_pcm_t *phandle;
- snd_pcm_hw_params_t *params;
- snd_pcm_hw_params_alloca( ¶ms );
-
- // First try for playback
- stream = SND_PCM_STREAM_PLAYBACK;
- snd_pcm_info_set_device( pcminfo, subdevice );
- snd_pcm_info_set_subdevice( pcminfo, 0 );
- snd_pcm_info_set_stream( pcminfo, stream );
-
- result = snd_ctl_pcm_info( chandle, pcminfo );
- if ( result < 0 ) {
- // Device probably doesn't support playback.
- goto captureProbe;
- }
-
- result = snd_pcm_open( &phandle, name, stream, openMode | SND_PCM_NONBLOCK );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- goto captureProbe;
- }
-
- // The device is open ... fill the parameter structure.
- result = snd_pcm_hw_params_any( phandle, params );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_hw_params error for device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- goto captureProbe;
- }
-
- // Get output channel information.
- unsigned int value;
- result = snd_pcm_hw_params_get_channels_max( params, &value );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::getDeviceInfo: error getting device (" << name << ") output channels, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- goto captureProbe;
- }
- info.outputChannels = value;
- snd_pcm_close( phandle );
-
- captureProbe:
- // Now try for capture
- stream = SND_PCM_STREAM_CAPTURE;
- snd_pcm_info_set_stream( pcminfo, stream );
-
- result = snd_ctl_pcm_info( chandle, pcminfo );
- snd_ctl_close( chandle );
- if ( result < 0 ) {
- // Device probably doesn't support capture.
- if ( info.outputChannels == 0 ) return info;
- goto probeParameters;
- }
-
- result = snd_pcm_open( &phandle, name, stream, openMode | SND_PCM_NONBLOCK);
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- if ( info.outputChannels == 0 ) return info;
- goto probeParameters;
- }
-
- // The device is open ... fill the parameter structure.
- result = snd_pcm_hw_params_any( phandle, params );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_hw_params error for device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- if ( info.outputChannels == 0 ) return info;
- goto probeParameters;
- }
-
- result = snd_pcm_hw_params_get_channels_max( params, &value );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::getDeviceInfo: error getting device (" << name << ") input channels, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- if ( info.outputChannels == 0 ) return info;
- goto probeParameters;
- }
- info.inputChannels = value;
- snd_pcm_close( phandle );
-
- // If device opens for both playback and capture, we determine the channels.
- if ( info.outputChannels > 0 && info.inputChannels > 0 )
- info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;
-
- // ALSA doesn't provide default devices so we'll use the first available one.
- if ( device == 0 && info.outputChannels > 0 )
- info.isDefaultOutput = true;
- if ( device == 0 && info.inputChannels > 0 )
- info.isDefaultInput = true;
-
- probeParameters:
- // At this point, we just need to figure out the supported data
- // formats and sample rates. We'll proceed by opening the device in
- // the direction with the maximum number of channels, or playback if
- // they are equal. This might limit our sample rate options, but so
- // be it.
-
- if ( info.outputChannels >= info.inputChannels )
- stream = SND_PCM_STREAM_PLAYBACK;
- else
- stream = SND_PCM_STREAM_CAPTURE;
- snd_pcm_info_set_stream( pcminfo, stream );
-
- result = snd_pcm_open( &phandle, name, stream, openMode | SND_PCM_NONBLOCK);
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // The device is open ... fill the parameter structure.
- result = snd_pcm_hw_params_any( phandle, params );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_hw_params error for device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Test our discrete set of sample rate values.
- info.sampleRates.clear();
- for ( unsigned int i=0; i<MAX_SAMPLE_RATES; i++ ) {
- if ( snd_pcm_hw_params_test_rate( phandle, params, SAMPLE_RATES[i], 0 ) == 0 )
- info.sampleRates.push_back( SAMPLE_RATES[i] );
- }
- if ( info.sampleRates.size() == 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::getDeviceInfo: no supported sample rates found for device (" << name << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Probe the supported data formats ... we don't care about endian-ness just yet
- snd_pcm_format_t format;
- info.nativeFormats = 0;
- format = SND_PCM_FORMAT_S8;
- if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )
- info.nativeFormats |= RTAUDIO_SINT8;
- format = SND_PCM_FORMAT_S16;
- if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )
- info.nativeFormats |= RTAUDIO_SINT16;
- format = SND_PCM_FORMAT_S24;
- if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )
- info.nativeFormats |= RTAUDIO_SINT24;
- format = SND_PCM_FORMAT_S32;
- if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )
- info.nativeFormats |= RTAUDIO_SINT32;
- format = SND_PCM_FORMAT_FLOAT;
- if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )
- info.nativeFormats |= RTAUDIO_FLOAT32;
- format = SND_PCM_FORMAT_FLOAT64;
- if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )
- info.nativeFormats |= RTAUDIO_FLOAT64;
-
- // Check that we have at least one supported format
- if ( info.nativeFormats == 0 ) {
- errorStream_ << "RtApiAlsa::getDeviceInfo: pcm device (" << name << ") data format not supported by RtAudio.";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Get the device name
- char *cardname;
- result = snd_card_get_name( card, &cardname );
- if ( result >= 0 )
- sprintf( name, "hw:%s,%d", cardname, subdevice );
- info.name = name;
-
- // That's all ... close the device and return
- snd_pcm_close( phandle );
- info.probed = true;
- return info;
-}
-
-void RtApiAlsa :: saveDeviceInfo( void )
-{
- devices_.clear();
-
- unsigned int nDevices = getDeviceCount();
- devices_.resize( nDevices );
- for ( unsigned int i=0; i<nDevices; i++ )
- devices_[i] = getDeviceInfo( i );
-}
-
-bool RtApiAlsa :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
- unsigned int firstChannel, unsigned int sampleRate,
- RtAudioFormat format, unsigned int *bufferSize,
- RtAudio::StreamOptions *options )
-
-{
-#if defined(__RTAUDIO_DEBUG__)
- snd_output_t *out;
- snd_output_stdio_attach(&out, stderr, 0);
-#endif
-
- // I'm not using the "plug" interface ... too much inconsistent behavior.
-
- unsigned nDevices = 0;
- int result, subdevice, card;
- char name[64];
- snd_ctl_t *chandle;
-
- // Count cards and devices
- card = -1;
- snd_card_next( &card );
- while ( card >= 0 ) {
- sprintf( name, "hw:%d", card );
- result = snd_ctl_open( &chandle, name, SND_CTL_NONBLOCK );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::probeDeviceOpen: control open, card = " << card << ", " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- subdevice = -1;
- while( 1 ) {
- result = snd_ctl_pcm_next_device( chandle, &subdevice );
- if ( result < 0 ) break;
- if ( subdevice < 0 ) break;
- if ( nDevices == device ) {
- sprintf( name, "hw:%d,%d", card, subdevice );
- snd_ctl_close( chandle );
- goto foundDevice;
- }
- nDevices++;
- }
- snd_ctl_close( chandle );
- snd_card_next( &card );
- }
-
- if ( nDevices == 0 ) {
- // This should not happen because a check is made before this function is called.
- errorText_ = "RtApiAlsa::probeDeviceOpen: no devices found!";
- return FAILURE;
- }
-
- if ( device >= nDevices ) {
- // This should not happen because a check is made before this function is called.
- errorText_ = "RtApiAlsa::probeDeviceOpen: device ID is invalid!";
- return FAILURE;
- }
-
- foundDevice:
-
- // The getDeviceInfo() function will not work for a device that is
- // already open. Thus, we'll probe the system before opening a
- // stream and save the results for use by getDeviceInfo().
- if ( mode == OUTPUT || ( mode == INPUT && stream_.mode != OUTPUT ) ) // only do once
- this->saveDeviceInfo();
-
- snd_pcm_stream_t stream;
- if ( mode == OUTPUT )
- stream = SND_PCM_STREAM_PLAYBACK;
- else
- stream = SND_PCM_STREAM_CAPTURE;
-
- snd_pcm_t *phandle;
- int openMode = SND_PCM_ASYNC;
- result = snd_pcm_open( &phandle, name, stream, openMode );
- if ( result < 0 ) {
- if ( mode == OUTPUT )
- errorStream_ << "RtApiAlsa::probeDeviceOpen: pcm device (" << name << ") won't open for output.";
- else
- errorStream_ << "RtApiAlsa::probeDeviceOpen: pcm device (" << name << ") won't open for input.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Fill the parameter structure.
- snd_pcm_hw_params_t *hw_params;
- snd_pcm_hw_params_alloca( &hw_params );
- result = snd_pcm_hw_params_any( phandle, hw_params );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error getting pcm device (" << name << ") parameters, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
-#if defined(__RTAUDIO_DEBUG__)
- fprintf( stderr, "\nRtApiAlsa: dump hardware params just after device open:\n\n" );
- snd_pcm_hw_params_dump( hw_params, out );
-#endif
-
- // Set access ... check user preference.
- if ( options && options->flags & RTAUDIO_NONINTERLEAVED ) {
- stream_.userInterleaved = false;
- result = snd_pcm_hw_params_set_access( phandle, hw_params, SND_PCM_ACCESS_RW_NONINTERLEAVED );
- if ( result < 0 ) {
- result = snd_pcm_hw_params_set_access( phandle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED );
- stream_.deviceInterleaved[mode] = true;
- }
- else
- stream_.deviceInterleaved[mode] = false;
- }
- else {
- stream_.userInterleaved = true;
- result = snd_pcm_hw_params_set_access( phandle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED );
- if ( result < 0 ) {
- result = snd_pcm_hw_params_set_access( phandle, hw_params, SND_PCM_ACCESS_RW_NONINTERLEAVED );
- stream_.deviceInterleaved[mode] = false;
- }
- else
- stream_.deviceInterleaved[mode] = true;
- }
-
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting pcm device (" << name << ") access, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Determine how to set the device format.
- stream_.userFormat = format;
- snd_pcm_format_t deviceFormat = SND_PCM_FORMAT_UNKNOWN;
-
- if ( format == RTAUDIO_SINT8 )
- deviceFormat = SND_PCM_FORMAT_S8;
- else if ( format == RTAUDIO_SINT16 )
- deviceFormat = SND_PCM_FORMAT_S16;
- else if ( format == RTAUDIO_SINT24 )
- deviceFormat = SND_PCM_FORMAT_S24;
- else if ( format == RTAUDIO_SINT32 )
- deviceFormat = SND_PCM_FORMAT_S32;
- else if ( format == RTAUDIO_FLOAT32 )
- deviceFormat = SND_PCM_FORMAT_FLOAT;
- else if ( format == RTAUDIO_FLOAT64 )
- deviceFormat = SND_PCM_FORMAT_FLOAT64;
-
- if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat) == 0) {
- stream_.deviceFormat[mode] = format;
- goto setFormat;
- }
-
- // The user requested format is not natively supported by the device.
- deviceFormat = SND_PCM_FORMAT_FLOAT64;
- if ( snd_pcm_hw_params_test_format( phandle, hw_params, deviceFormat ) == 0 ) {
- stream_.deviceFormat[mode] = RTAUDIO_FLOAT64;
- goto setFormat;
- }
-
- deviceFormat = SND_PCM_FORMAT_FLOAT;
- if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat ) == 0 ) {
- stream_.deviceFormat[mode] = RTAUDIO_FLOAT32;
- goto setFormat;
- }
-
- deviceFormat = SND_PCM_FORMAT_S32;
- if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat ) == 0 ) {
- stream_.deviceFormat[mode] = RTAUDIO_SINT32;
- goto setFormat;
- }
-
- deviceFormat = SND_PCM_FORMAT_S24;
- if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat ) == 0 ) {
- stream_.deviceFormat[mode] = RTAUDIO_SINT24;
- goto setFormat;
- }
-
- deviceFormat = SND_PCM_FORMAT_S16;
- if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat ) == 0 ) {
- stream_.deviceFormat[mode] = RTAUDIO_SINT16;
- goto setFormat;
- }
-
- deviceFormat = SND_PCM_FORMAT_S8;
- if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat ) == 0 ) {
- stream_.deviceFormat[mode] = RTAUDIO_SINT8;
- goto setFormat;
- }
-
- // If we get here, no supported format was found.
- errorStream_ << "RtApiAlsa::probeDeviceOpen: pcm device " << device << " data format not supported by RtAudio.";
- errorText_ = errorStream_.str();
- return FAILURE;
-
- setFormat:
- result = snd_pcm_hw_params_set_format( phandle, hw_params, deviceFormat );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting pcm device (" << name << ") data format, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Determine whether byte-swaping is necessary.
- stream_.doByteSwap[mode] = false;
- if ( deviceFormat != SND_PCM_FORMAT_S8 ) {
- result = snd_pcm_format_cpu_endian( deviceFormat );
- if ( result == 0 )
- stream_.doByteSwap[mode] = true;
- else if (result < 0) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error getting pcm device (" << name << ") endian-ness, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
-
- // Set the sample rate.
- result = snd_pcm_hw_params_set_rate_near( phandle, hw_params, (unsigned int*) &sampleRate, 0 );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting sample rate on device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Determine the number of channels for this device. We support a possible
- // minimum device channel number > than the value requested by the user.
- stream_.nUserChannels[mode] = channels;
- unsigned int value;
- result = snd_pcm_hw_params_get_channels_max( hw_params, &value );
- unsigned int deviceChannels = value;
- if ( result < 0 || deviceChannels < channels + firstChannel ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: requested channel parameters not supported by device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- result = snd_pcm_hw_params_get_channels_min( hw_params, &value );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error getting minimum channels for device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- deviceChannels = value;
- if ( deviceChannels < channels + firstChannel ) deviceChannels = channels + firstChannel;
- stream_.nDeviceChannels[mode] = deviceChannels;
-
- // Set the device channels.
- result = snd_pcm_hw_params_set_channels( phandle, hw_params, deviceChannels );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting channels for device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Set the buffer number, which in ALSA is referred to as the "period".
- int totalSize, dir = 0;
- unsigned int periods = 0;
- if ( options ) periods = options->numberOfBuffers;
- totalSize = *bufferSize * periods;
-
- // Set the buffer (or period) size.
- snd_pcm_uframes_t periodSize = *bufferSize;
- result = snd_pcm_hw_params_set_period_size_near( phandle, hw_params, &periodSize, &dir );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting period size for device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- *bufferSize = periodSize;
-
- if ( options && options->flags & RTAUDIO_MINIMIZE_LATENCY ) periods = 2;
- else periods = totalSize / *bufferSize;
- // Even though the hardware might allow 1 buffer, it won't work reliably.
- if ( periods < 2 ) periods = 2;
- result = snd_pcm_hw_params_set_periods_near( phandle, hw_params, &periods, &dir );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting periods for device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // If attempting to setup a duplex stream, the bufferSize parameter
- // MUST be the same in both directions!
- if ( stream_.mode == OUTPUT && mode == INPUT && *bufferSize != stream_.bufferSize ) {
- errorStream_ << "RtApiAlsa::probeDeviceOpen: system error setting buffer size for duplex stream on device (" << name << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- stream_.bufferSize = *bufferSize;
-
- // Install the hardware configuration
- result = snd_pcm_hw_params( phandle, hw_params );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error installing hardware configuration on device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
-#if defined(__RTAUDIO_DEBUG__)
- fprintf(stderr, "\nRtApiAlsa: dump hardware params after installation:\n\n");
- snd_pcm_hw_params_dump( hw_params, out );
-#endif
-
- // Set the software configuration to fill buffers with zeros and prevent device stopping on xruns.
- snd_pcm_sw_params_t *sw_params = NULL;
- snd_pcm_sw_params_alloca( &sw_params );
- snd_pcm_sw_params_current( phandle, sw_params );
- snd_pcm_sw_params_set_start_threshold( phandle, sw_params, *bufferSize );
- snd_pcm_sw_params_set_stop_threshold( phandle, sw_params, ULONG_MAX );
- snd_pcm_sw_params_set_silence_threshold( phandle, sw_params, 0 );
-
- // The following two settings were suggested by Theo Veenker
- //snd_pcm_sw_params_set_avail_min( phandle, sw_params, *bufferSize );
- //snd_pcm_sw_params_set_xfer_align( phandle, sw_params, 1 );
-
- // here are two options for a fix
- //snd_pcm_sw_params_set_silence_size( phandle, sw_params, ULONG_MAX );
- snd_pcm_uframes_t val;
- snd_pcm_sw_params_get_boundary( sw_params, &val );
- snd_pcm_sw_params_set_silence_size( phandle, sw_params, val );
-
- result = snd_pcm_sw_params( phandle, sw_params );
- if ( result < 0 ) {
- snd_pcm_close( phandle );
- errorStream_ << "RtApiAlsa::probeDeviceOpen: error installing software configuration on device (" << name << "), " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
-#if defined(__RTAUDIO_DEBUG__)
- fprintf(stderr, "\nRtApiAlsa: dump software params after installation:\n\n");
- snd_pcm_sw_params_dump( sw_params, out );
-#endif
-
- // Set flags for buffer conversion
- stream_.doConvertBuffer[mode] = false;
- if ( stream_.userFormat != stream_.deviceFormat[mode] )
- stream_.doConvertBuffer[mode] = true;
- if ( stream_.nUserChannels[mode] < stream_.nDeviceChannels[mode] )
- stream_.doConvertBuffer[mode] = true;
- if ( stream_.userInterleaved != stream_.deviceInterleaved[mode] &&
- stream_.nUserChannels[mode] > 1 )
- stream_.doConvertBuffer[mode] = true;
-
- // Allocate the ApiHandle if necessary and then save.
- AlsaHandle *apiInfo = 0;
- if ( stream_.apiHandle == 0 ) {
- try {
- apiInfo = (AlsaHandle *) new AlsaHandle;
- }
- catch ( std::bad_alloc& ) {
- errorText_ = "RtApiAlsa::probeDeviceOpen: error allocating AlsaHandle memory.";
- goto error;
- }
-
- if ( pthread_cond_init( &apiInfo->runnable, NULL ) ) {
- errorText_ = "RtApiAlsa::probeDeviceOpen: error initializing pthread condition variable.";
- goto error;
- }
-
- stream_.apiHandle = (void *) apiInfo;
- apiInfo->handles[0] = 0;
- apiInfo->handles[1] = 0;
- }
- else {
- apiInfo = (AlsaHandle *) stream_.apiHandle;
- }
- apiInfo->handles[mode] = phandle;
-
- // Allocate necessary internal buffers.
- unsigned long bufferBytes;
- bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );
- stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );
- if ( stream_.userBuffer[mode] == NULL ) {
- errorText_ = "RtApiAlsa::probeDeviceOpen: error allocating user buffer memory.";
- goto error;
- }
-
- if ( stream_.doConvertBuffer[mode] ) {
-
- bool makeBuffer = true;
- bufferBytes = stream_.nDeviceChannels[mode] * formatBytes( stream_.deviceFormat[mode] );
- if ( mode == INPUT ) {
- if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {
- unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );
- if ( bufferBytes <= bytesOut ) makeBuffer = false;
- }
- }
-
- if ( makeBuffer ) {
- bufferBytes *= *bufferSize;
- if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );
- stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );
- if ( stream_.deviceBuffer == NULL ) {
- errorText_ = "RtApiAlsa::probeDeviceOpen: error allocating device buffer memory.";
- goto error;
- }
- }
- }
-
- stream_.sampleRate = sampleRate;
- stream_.nBuffers = periods;
- stream_.device[mode] = device;
- stream_.state = STREAM_STOPPED;
-
- // Setup the buffer conversion information structure.
- if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, firstChannel );
-
- // Setup thread if necessary.
- if ( stream_.mode == OUTPUT && mode == INPUT ) {
- // We had already set up an output stream.
- stream_.mode = DUPLEX;
- // Link the streams if possible.
- apiInfo->synchronized = false;
- if ( snd_pcm_link( apiInfo->handles[0], apiInfo->handles[1] ) == 0 )
- apiInfo->synchronized = true;
- else {
- errorText_ = "RtApiAlsa::probeDeviceOpen: unable to synchronize input and output devices.";
- error( RtError::WARNING );
- }
- }
- else {
- stream_.mode = mode;
-
- // Setup callback thread.
- stream_.callbackInfo.object = (void *) this;
-
- // Set the thread attributes for joinable and realtime scheduling
- // priority (optional). The higher priority will only take affect
- // if the program is run as root or suid. Note, under Linux
- // processes with CAP_SYS_NICE privilege, a user can change
- // scheduling policy and priority (thus need not be root). See
- // POSIX "capabilities".
- pthread_attr_t attr;
- pthread_attr_init( &attr );
- pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_JOINABLE );
-#ifdef SCHED_RR // Undefined with some OSes (eg: NetBSD 1.6.x with GNU Pthread)
- if ( options && options->flags & RTAUDIO_SCHEDULE_REALTIME ) {
- struct sched_param param;
- int priority = options->priority;
- int min = sched_get_priority_min( SCHED_RR );
- int max = sched_get_priority_max( SCHED_RR );
- if ( priority < min ) priority = min;
- else if ( priority > max ) priority = max;
- param.sched_priority = priority;
- pthread_attr_setschedparam( &attr, ¶m );
- pthread_attr_setschedpolicy( &attr, SCHED_RR );
- }
- else
- pthread_attr_setschedpolicy( &attr, SCHED_OTHER );
-#else
- pthread_attr_setschedpolicy( &attr, SCHED_OTHER );
-#endif
-
- stream_.callbackInfo.isRunning = true;
- result = pthread_create( &stream_.callbackInfo.thread, &attr, alsaCallbackHandler, &stream_.callbackInfo );
- pthread_attr_destroy( &attr );
- if ( result ) {
- stream_.callbackInfo.isRunning = false;
- errorText_ = "RtApiAlsa::error creating callback thread!";
- goto error;
- }
- }
-
- return SUCCESS;
-
- error:
- if ( apiInfo ) {
- pthread_cond_destroy( &apiInfo->runnable );
- if ( apiInfo->handles[0] ) snd_pcm_close( apiInfo->handles[0] );
- if ( apiInfo->handles[1] ) snd_pcm_close( apiInfo->handles[1] );
- delete apiInfo;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- return FAILURE;
-}
-
-void RtApiAlsa :: closeStream()
-{
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiAlsa::closeStream(): no open stream to close!";
- error( RtError::WARNING );
- return;
- }
-
- AlsaHandle *apiInfo = (AlsaHandle *) stream_.apiHandle;
- stream_.callbackInfo.isRunning = false;
- MUTEX_LOCK( &stream_.mutex );
- if ( stream_.state == STREAM_STOPPED )
- pthread_cond_signal( &apiInfo->runnable );
- MUTEX_UNLOCK( &stream_.mutex );
- pthread_join( stream_.callbackInfo.thread, NULL );
-
- if ( stream_.state == STREAM_RUNNING ) {
- stream_.state = STREAM_STOPPED;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX )
- snd_pcm_drop( apiInfo->handles[0] );
- if ( stream_.mode == INPUT || stream_.mode == DUPLEX )
- snd_pcm_drop( apiInfo->handles[1] );
- }
-
- if ( apiInfo ) {
- pthread_cond_destroy( &apiInfo->runnable );
- if ( apiInfo->handles[0] ) snd_pcm_close( apiInfo->handles[0] );
- if ( apiInfo->handles[1] ) snd_pcm_close( apiInfo->handles[1] );
- delete apiInfo;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- stream_.mode = UNINITIALIZED;
- stream_.state = STREAM_CLOSED;
-}
-
-void RtApiAlsa :: startStream()
-{
- // This method calls snd_pcm_prepare if the device isn't already in that state.
-
- verifyStream();
- if ( stream_.state == STREAM_RUNNING ) {
- errorText_ = "RtApiAlsa::startStream(): the stream is already running!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- int result = 0;
- snd_pcm_state_t state;
- AlsaHandle *apiInfo = (AlsaHandle *) stream_.apiHandle;
- snd_pcm_t **handle = (snd_pcm_t **) apiInfo->handles;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
- state = snd_pcm_state( handle[0] );
- if ( state != SND_PCM_STATE_PREPARED ) {
- result = snd_pcm_prepare( handle[0] );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::startStream: error preparing output pcm device, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
- }
-
- if ( ( stream_.mode == INPUT || stream_.mode == DUPLEX ) && !apiInfo->synchronized ) {
- state = snd_pcm_state( handle[1] );
- if ( state != SND_PCM_STATE_PREPARED ) {
- result = snd_pcm_prepare( handle[1] );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::startStream: error preparing input pcm device, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
- }
-
- stream_.state = STREAM_RUNNING;
-
- unlock:
- MUTEX_UNLOCK( &stream_.mutex );
-
- pthread_cond_signal( &apiInfo->runnable );
-
- if ( result >= 0 ) return;
- error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiAlsa :: stopStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiAlsa::stopStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
-
- int result = 0;
- AlsaHandle *apiInfo = (AlsaHandle *) stream_.apiHandle;
- snd_pcm_t **handle = (snd_pcm_t **) apiInfo->handles;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
- if ( apiInfo->synchronized )
- result = snd_pcm_drop( handle[0] );
- else
- result = snd_pcm_drain( handle[0] );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::stopStream: error draining output pcm device, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- if ( ( stream_.mode == INPUT || stream_.mode == DUPLEX ) && !apiInfo->synchronized ) {
- result = snd_pcm_drop( handle[1] );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::stopStream: error stopping input pcm device, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- unlock:
- stream_.state = STREAM_STOPPED;
- MUTEX_UNLOCK( &stream_.mutex );
-
- if ( result >= 0 ) return;
- error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiAlsa :: abortStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiAlsa::abortStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
-
- int result = 0;
- AlsaHandle *apiInfo = (AlsaHandle *) stream_.apiHandle;
- snd_pcm_t **handle = (snd_pcm_t **) apiInfo->handles;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
- result = snd_pcm_drop( handle[0] );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::abortStream: error aborting output pcm device, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- if ( ( stream_.mode == INPUT || stream_.mode == DUPLEX ) && !apiInfo->synchronized ) {
- result = snd_pcm_drop( handle[1] );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::abortStream: error aborting input pcm device, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- unlock:
- stream_.state = STREAM_STOPPED;
- MUTEX_UNLOCK( &stream_.mutex );
-
- if ( result >= 0 ) return;
- error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiAlsa :: callbackEvent()
-{
- AlsaHandle *apiInfo = (AlsaHandle *) stream_.apiHandle;
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_LOCK( &stream_.mutex );
- pthread_cond_wait( &apiInfo->runnable, &stream_.mutex );
- if ( stream_.state != STREAM_RUNNING ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
- MUTEX_UNLOCK( &stream_.mutex );
- }
-
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiAlsa::callbackEvent(): the stream is closed ... this shouldn't happen!";
- error( RtError::WARNING );
- return;
- }
-
- int doStopStream = 0;
- RtAudioCallback callback = (RtAudioCallback) stream_.callbackInfo.callback;
- double streamTime = getStreamTime();
- RtAudioStreamStatus status = 0;
- if ( stream_.mode != INPUT && apiInfo->xrun[0] == true ) {
- status |= RTAUDIO_OUTPUT_UNDERFLOW;
- apiInfo->xrun[0] = false;
- }
- if ( stream_.mode != OUTPUT && apiInfo->xrun[1] == true ) {
- status |= RTAUDIO_INPUT_OVERFLOW;
- apiInfo->xrun[1] = false;
- }
- doStopStream = callback( stream_.userBuffer[0], stream_.userBuffer[1],
- stream_.bufferSize, streamTime, status, stream_.callbackInfo.userData );
-
- if ( doStopStream == 2 ) {
- abortStream();
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- // The state might change while waiting on a mutex.
- if ( stream_.state == STREAM_STOPPED ) goto unlock;
-
- int result;
- char *buffer;
- int channels;
- snd_pcm_t **handle;
- snd_pcm_sframes_t frames;
- RtAudioFormat format;
- handle = (snd_pcm_t **) apiInfo->handles;
-
- if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {
-
- // Setup parameters.
- if ( stream_.doConvertBuffer[1] ) {
- buffer = stream_.deviceBuffer;
- channels = stream_.nDeviceChannels[1];
- format = stream_.deviceFormat[1];
- }
- else {
- buffer = stream_.userBuffer[1];
- channels = stream_.nUserChannels[1];
- format = stream_.userFormat;
- }
-
- // Read samples from device in interleaved/non-interleaved format.
- if ( stream_.deviceInterleaved[1] )
- result = snd_pcm_readi( handle[1], buffer, stream_.bufferSize );
- else {
- void *bufs[channels];
- size_t offset = stream_.bufferSize * formatBytes( format );
- for ( int i=0; i<channels; i++ )
- bufs[i] = (void *) (buffer + (i * offset));
- result = snd_pcm_readn( handle[1], bufs, stream_.bufferSize );
- }
-
- if ( result < (int) stream_.bufferSize ) {
- // Either an error or overrun occured.
- if ( result == -EPIPE ) {
- snd_pcm_state_t state = snd_pcm_state( handle[1] );
- if ( state == SND_PCM_STATE_XRUN ) {
- apiInfo->xrun[1] = true;
- result = snd_pcm_prepare( handle[1] );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::callbackEvent: error preparing device after overrun, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- }
- }
- else {
- errorStream_ << "RtApiAlsa::callbackEvent: error, current state is " << snd_pcm_state_name( state ) << ", " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- }
- }
- else {
- errorStream_ << "RtApiAlsa::callbackEvent: audio read error, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- }
- error( RtError::WARNING );
- goto tryOutput;
- }
-
- // Do byte swapping if necessary.
- if ( stream_.doByteSwap[1] )
- byteSwapBuffer( buffer, stream_.bufferSize * channels, format );
-
- // Do buffer conversion if necessary.
- if ( stream_.doConvertBuffer[1] )
- convertBuffer( stream_.userBuffer[1], stream_.deviceBuffer, stream_.convertInfo[1] );
-
- // Check stream latency
- result = snd_pcm_delay( handle[1], &frames );
- if ( result == 0 && frames > 0 ) stream_.latency[1] = frames;
- }
-
- tryOutput:
-
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
-
- // Setup parameters and do buffer conversion if necessary.
- if ( stream_.doConvertBuffer[0] ) {
- buffer = stream_.deviceBuffer;
- convertBuffer( buffer, stream_.userBuffer[0], stream_.convertInfo[0] );
- channels = stream_.nDeviceChannels[0];
- format = stream_.deviceFormat[0];
- }
- else {
- buffer = stream_.userBuffer[0];
- channels = stream_.nUserChannels[0];
- format = stream_.userFormat;
- }
-
- // Do byte swapping if necessary.
- if ( stream_.doByteSwap[0] )
- byteSwapBuffer(buffer, stream_.bufferSize * channels, format);
-
- // Write samples to device in interleaved/non-interleaved format.
- if ( stream_.deviceInterleaved[0] )
- result = snd_pcm_writei( handle[0], buffer, stream_.bufferSize );
- else {
- void *bufs[channels];
- size_t offset = stream_.bufferSize * formatBytes( format );
- for ( int i=0; i<channels; i++ )
- bufs[i] = (void *) (buffer + (i * offset));
- result = snd_pcm_writen( handle[0], bufs, stream_.bufferSize );
- }
-
- if ( result < (int) stream_.bufferSize ) {
- // Either an error or underrun occured.
- if ( result == -EPIPE ) {
- snd_pcm_state_t state = snd_pcm_state( handle[0] );
- if ( state == SND_PCM_STATE_XRUN ) {
- apiInfo->xrun[0] = true;
- result = snd_pcm_prepare( handle[0] );
- if ( result < 0 ) {
- errorStream_ << "RtApiAlsa::callbackEvent: error preparing device after underrun, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- }
- }
- else {
- errorStream_ << "RtApiAlsa::callbackEvent: error, current state is " << snd_pcm_state_name( state ) << ", " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- }
- }
- else {
- errorStream_ << "RtApiAlsa::callbackEvent: audio write error, " << snd_strerror( result ) << ".";
- errorText_ = errorStream_.str();
- }
- error( RtError::WARNING );
- goto unlock;
- }
-
- // Check stream latency
- result = snd_pcm_delay( handle[0], &frames );
- if ( result == 0 && frames > 0 ) stream_.latency[0] = frames;
- }
-
- unlock:
- MUTEX_UNLOCK( &stream_.mutex );
-
- RtApi::tickStreamTime();
- if ( doStopStream == 1 ) this->stopStream();
-}
-
-extern "C" void *alsaCallbackHandler( void *ptr )
-{
- CallbackInfo *info = (CallbackInfo *) ptr;
- RtApiAlsa *object = (RtApiAlsa *) info->object;
- bool *isRunning = &info->isRunning;
-
- while ( *isRunning == true ) {
- pthread_testcancel();
- object->callbackEvent();
- }
-
- pthread_exit( NULL );
-}
-
-//******************** End of __LINUX_ALSA__ *********************//
-#endif
-
-
-#if defined(__LINUX_OSS__)
-
-#include <unistd.h>
-#include <sys/ioctl.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include "soundcard.h"
-#include <errno.h>
-#include <math.h>
-
-extern "C" void *ossCallbackHandler(void * ptr);
-
-// A structure to hold various information related to the OSS API
-// implementation.
-struct OssHandle {
- int id[2]; // device ids
- bool xrun[2];
- bool triggered;
- pthread_cond_t runnable;
-
- OssHandle()
- :triggered(false) { id[0] = 0; id[1] = 0; xrun[0] = false; xrun[1] = false; }
-};
-
-RtApiOss :: RtApiOss()
-{
- // Nothing to do here.
-}
-
-RtApiOss :: ~RtApiOss()
-{
- if ( stream_.state != STREAM_CLOSED ) closeStream();
-}
-
-unsigned int RtApiOss :: getDeviceCount( void )
-{
- int mixerfd = open( "/dev/mixer", O_RDWR, 0 );
- if ( mixerfd == -1 ) {
- errorText_ = "RtApiOss::getDeviceCount: error opening '/dev/mixer'.";
- error( RtError::WARNING );
- return 0;
- }
-
- oss_sysinfo sysinfo;
- if ( ioctl( mixerfd, SNDCTL_SYSINFO, &sysinfo ) == -1 ) {
- close( mixerfd );
- errorText_ = "RtApiOss::getDeviceCount: error getting sysinfo, OSS version >= 4.0 is required.";
- error( RtError::WARNING );
- return 0;
- }
-
- close( mixerfd );
- return sysinfo.numaudios;
-}
-
-RtAudio::DeviceInfo RtApiOss :: getDeviceInfo( unsigned int device )
-{
- RtAudio::DeviceInfo info;
- info.probed = false;
-
- int mixerfd = open( "/dev/mixer", O_RDWR, 0 );
- if ( mixerfd == -1 ) {
- errorText_ = "RtApiOss::getDeviceInfo: error opening '/dev/mixer'.";
- error( RtError::WARNING );
- return info;
- }
-
- oss_sysinfo sysinfo;
- int result = ioctl( mixerfd, SNDCTL_SYSINFO, &sysinfo );
- if ( result == -1 ) {
- close( mixerfd );
- errorText_ = "RtApiOss::getDeviceInfo: error getting sysinfo, OSS version >= 4.0 is required.";
- error( RtError::WARNING );
- return info;
- }
-
- unsigned nDevices = sysinfo.numaudios;
- if ( nDevices == 0 ) {
- close( mixerfd );
- errorText_ = "RtApiOss::getDeviceInfo: no devices found!";
- error( RtError::INVALID_USE );
- }
-
- if ( device >= nDevices ) {
- close( mixerfd );
- errorText_ = "RtApiOss::getDeviceInfo: device ID is invalid!";
- error( RtError::INVALID_USE );
- }
-
- oss_audioinfo ainfo;
- ainfo.dev = device;
- result = ioctl( mixerfd, SNDCTL_AUDIOINFO, &ainfo );
- close( mixerfd );
- if ( result == -1 ) {
- errorStream_ << "RtApiOss::getDeviceInfo: error getting device (" << ainfo.name << ") info.";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Probe channels
- if ( ainfo.caps & PCM_CAP_OUTPUT ) info.outputChannels = ainfo.max_channels;
- if ( ainfo.caps & PCM_CAP_INPUT ) info.inputChannels = ainfo.max_channels;
- if ( ainfo.caps & PCM_CAP_DUPLEX ) {
- if ( info.outputChannels > 0 && info.inputChannels > 0 && ainfo.caps & PCM_CAP_DUPLEX )
- info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;
- }
-
- // Probe data formats ... do for input
- unsigned long mask = ainfo.iformats;
- if ( mask & AFMT_S16_LE || mask & AFMT_S16_BE )
- info.nativeFormats |= RTAUDIO_SINT16;
- if ( mask & AFMT_S8 )
- info.nativeFormats |= RTAUDIO_SINT8;
- if ( mask & AFMT_S32_LE || mask & AFMT_S32_BE )
- info.nativeFormats |= RTAUDIO_SINT32;
- if ( mask & AFMT_FLOAT )
- info.nativeFormats |= RTAUDIO_FLOAT32;
- if ( mask & AFMT_S24_LE || mask & AFMT_S24_BE )
- info.nativeFormats |= RTAUDIO_SINT24;
-
- // Check that we have at least one supported format
- if ( info.nativeFormats == 0 ) {
- errorStream_ << "RtApiOss::getDeviceInfo: device (" << ainfo.name << ") data format not supported by RtAudio.";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- return info;
- }
-
- // Probe the supported sample rates.
- info.sampleRates.clear();
- if ( ainfo.nrates ) {
- for ( unsigned int i=0; i<ainfo.nrates; i++ ) {
- for ( unsigned int k=0; k<MAX_SAMPLE_RATES; k++ ) {
- if ( ainfo.rates[i] == SAMPLE_RATES[k] ) {
- info.sampleRates.push_back( SAMPLE_RATES[k] );
- break;
- }
- }
- }
- }
- else {
- // Check min and max rate values;
- for ( unsigned int k=0; k<MAX_SAMPLE_RATES; k++ ) {
- if ( ainfo.min_rate <= (int) SAMPLE_RATES[k] && ainfo.max_rate >= (int) SAMPLE_RATES[k] )
- info.sampleRates.push_back( SAMPLE_RATES[k] );
- }
- }
-
- if ( info.sampleRates.size() == 0 ) {
- errorStream_ << "RtApiOss::getDeviceInfo: no supported sample rates found for device (" << ainfo.name << ").";
- errorText_ = errorStream_.str();
- error( RtError::WARNING );
- }
- else {
- info.probed = true;
- info.name = ainfo.name;
- }
-
- return info;
-}
-
-
-bool RtApiOss :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,
- unsigned int firstChannel, unsigned int sampleRate,
- RtAudioFormat format, unsigned int *bufferSize,
- RtAudio::StreamOptions *options )
-{
- int mixerfd = open( "/dev/mixer", O_RDWR, 0 );
- if ( mixerfd == -1 ) {
- errorText_ = "RtApiOss::probeDeviceOpen: error opening '/dev/mixer'.";
- return FAILURE;
- }
-
- oss_sysinfo sysinfo;
- int result = ioctl( mixerfd, SNDCTL_SYSINFO, &sysinfo );
- if ( result == -1 ) {
- close( mixerfd );
- errorText_ = "RtApiOss::probeDeviceOpen: error getting sysinfo, OSS version >= 4.0 is required.";
- return FAILURE;
- }
-
- unsigned nDevices = sysinfo.numaudios;
- if ( nDevices == 0 ) {
- // This should not happen because a check is made before this function is called.
- close( mixerfd );
- errorText_ = "RtApiOss::probeDeviceOpen: no devices found!";
- return FAILURE;
- }
-
- if ( device >= nDevices ) {
- // This should not happen because a check is made before this function is called.
- close( mixerfd );
- errorText_ = "RtApiOss::probeDeviceOpen: device ID is invalid!";
- return FAILURE;
- }
-
- oss_audioinfo ainfo;
- ainfo.dev = device;
- result = ioctl( mixerfd, SNDCTL_AUDIOINFO, &ainfo );
- close( mixerfd );
- if ( result == -1 ) {
- errorStream_ << "RtApiOss::getDeviceInfo: error getting device (" << ainfo.name << ") info.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Check if device supports input or output
- if ( ( mode == OUTPUT && !( ainfo.caps & PCM_CAP_OUTPUT ) ) ||
- ( mode == INPUT && !( ainfo.caps & PCM_CAP_INPUT ) ) ) {
- if ( mode == OUTPUT )
- errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") does not support output.";
- else
- errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") does not support input.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- int flags = 0;
- OssHandle *handle = (OssHandle *) stream_.apiHandle;
- if ( mode == OUTPUT )
- flags |= O_WRONLY;
- else { // mode == INPUT
- if (stream_.mode == OUTPUT && stream_.device[0] == device) {
- // We just set the same device for playback ... close and reopen for duplex (OSS only).
- close( handle->id[0] );
- handle->id[0] = 0;
- if ( !( ainfo.caps & PCM_CAP_DUPLEX ) ) {
- errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") does not support duplex mode.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- // Check that the number previously set channels is the same.
- if ( stream_.nUserChannels[0] != channels ) {
- errorStream_ << "RtApiOss::probeDeviceOpen: input/output channels must be equal for OSS duplex device (" << ainfo.name << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- flags |= O_RDWR;
- }
- else
- flags |= O_RDONLY;
- }
-
- // Set exclusive access if specified.
- if ( options && options->flags & RTAUDIO_HOG_DEVICE ) flags |= O_EXCL;
-
- // Try to open the device.
- int fd;
- fd = open( ainfo.devnode, flags, 0 );
- if ( fd == -1 ) {
- if ( errno == EBUSY )
- errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") is busy.";
- else
- errorStream_ << "RtApiOss::probeDeviceOpen: error opening device (" << ainfo.name << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // For duplex operation, specifically set this mode (this doesn't seem to work).
- /*
- if ( flags | O_RDWR ) {
- result = ioctl( fd, SNDCTL_DSP_SETDUPLEX, NULL );
- if ( result == -1) {
- errorStream_ << "RtApiOss::probeDeviceOpen: error setting duplex mode for device (" << ainfo.name << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- }
- */
-
- // Check the device channel support.
- stream_.nUserChannels[mode] = channels;
- if ( ainfo.max_channels < (int)(channels + firstChannel) ) {
- close( fd );
- errorStream_ << "RtApiOss::probeDeviceOpen: the device (" << ainfo.name << ") does not support requested channel parameters.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Set the number of channels.
- int deviceChannels = channels + firstChannel;
- result = ioctl( fd, SNDCTL_DSP_CHANNELS, &deviceChannels );
- if ( result == -1 || deviceChannels < (int)(channels + firstChannel) ) {
- close( fd );
- errorStream_ << "RtApiOss::probeDeviceOpen: error setting channel parameters on device (" << ainfo.name << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- stream_.nDeviceChannels[mode] = deviceChannels;
-
- // Get the data format mask
- int mask;
- result = ioctl( fd, SNDCTL_DSP_GETFMTS, &mask );
- if ( result == -1 ) {
- close( fd );
- errorStream_ << "RtApiOss::probeDeviceOpen: error getting device (" << ainfo.name << ") data formats.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Determine how to set the device format.
- stream_.userFormat = format;
- int deviceFormat = -1;
- stream_.doByteSwap[mode] = false;
- if ( format == RTAUDIO_SINT8 ) {
- if ( mask & AFMT_S8 ) {
- deviceFormat = AFMT_S8;
- stream_.deviceFormat[mode] = RTAUDIO_SINT8;
- }
- }
- else if ( format == RTAUDIO_SINT16 ) {
- if ( mask & AFMT_S16_NE ) {
- deviceFormat = AFMT_S16_NE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT16;
- }
- else if ( mask & AFMT_S16_OE ) {
- deviceFormat = AFMT_S16_OE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT16;
- stream_.doByteSwap[mode] = true;
- }
- }
- else if ( format == RTAUDIO_SINT24 ) {
- if ( mask & AFMT_S24_NE ) {
- deviceFormat = AFMT_S24_NE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT24;
- }
- else if ( mask & AFMT_S24_OE ) {
- deviceFormat = AFMT_S24_OE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT24;
- stream_.doByteSwap[mode] = true;
- }
- }
- else if ( format == RTAUDIO_SINT32 ) {
- if ( mask & AFMT_S32_NE ) {
- deviceFormat = AFMT_S32_NE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT32;
- }
- else if ( mask & AFMT_S32_OE ) {
- deviceFormat = AFMT_S32_OE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT32;
- stream_.doByteSwap[mode] = true;
- }
- }
-
- if ( deviceFormat == -1 ) {
- // The user requested format is not natively supported by the device.
- if ( mask & AFMT_S16_NE ) {
- deviceFormat = AFMT_S16_NE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT16;
- }
- else if ( mask & AFMT_S32_NE ) {
- deviceFormat = AFMT_S32_NE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT32;
- }
- else if ( mask & AFMT_S24_NE ) {
- deviceFormat = AFMT_S24_NE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT24;
- }
- else if ( mask & AFMT_S16_OE ) {
- deviceFormat = AFMT_S16_OE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT16;
- stream_.doByteSwap[mode] = true;
- }
- else if ( mask & AFMT_S32_OE ) {
- deviceFormat = AFMT_S32_OE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT32;
- stream_.doByteSwap[mode] = true;
- }
- else if ( mask & AFMT_S24_OE ) {
- deviceFormat = AFMT_S24_OE;
- stream_.deviceFormat[mode] = RTAUDIO_SINT24;
- stream_.doByteSwap[mode] = true;
- }
- else if ( mask & AFMT_S8) {
- deviceFormat = AFMT_S8;
- stream_.deviceFormat[mode] = RTAUDIO_SINT8;
- }
- }
-
- if ( stream_.deviceFormat[mode] == 0 ) {
- // This really shouldn't happen ...
- close( fd );
- errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") data format not supported by RtAudio.";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Set the data format.
- int temp = deviceFormat;
- result = ioctl( fd, SNDCTL_DSP_SETFMT, &deviceFormat );
- if ( result == -1 || deviceFormat != temp ) {
- close( fd );
- errorStream_ << "RtApiOss::probeDeviceOpen: error setting data format on device (" << ainfo.name << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Attempt to set the buffer size. According to OSS, the minimum
- // number of buffers is two. The supposed minimum buffer size is 16
- // bytes, so that will be our lower bound. The argument to this
- // call is in the form 0xMMMMSSSS (hex), where the buffer size (in
- // bytes) is given as 2^SSSS and the number of buffers as 2^MMMM.
- // We'll check the actual value used near the end of the setup
- // procedure.
- int ossBufferBytes = *bufferSize * formatBytes( stream_.deviceFormat[mode] ) * deviceChannels;
- if ( ossBufferBytes < 16 ) ossBufferBytes = 16;
- int buffers = 0;
- if ( options ) buffers = options->numberOfBuffers;
- if ( options && options->flags & RTAUDIO_MINIMIZE_LATENCY ) buffers = 2;
- if ( buffers < 2 ) buffers = 3;
- temp = ((int) buffers << 16) + (int)( log10( (double)ossBufferBytes ) / log10( 2.0 ) );
- result = ioctl( fd, SNDCTL_DSP_SETFRAGMENT, &temp );
- if ( result == -1 ) {
- close( fd );
- errorStream_ << "RtApiOss::probeDeviceOpen: error setting buffer size on device (" << ainfo.name << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- stream_.nBuffers = buffers;
-
- // Save buffer size (in sample frames).
- *bufferSize = ossBufferBytes / ( formatBytes(stream_.deviceFormat[mode]) * deviceChannels );
- stream_.bufferSize = *bufferSize;
-
- // Set the sample rate.
- int srate = sampleRate;
- result = ioctl( fd, SNDCTL_DSP_SPEED, &srate );
- if ( result == -1 ) {
- close( fd );
- errorStream_ << "RtApiOss::probeDeviceOpen: error setting sample rate (" << sampleRate << ") on device (" << ainfo.name << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
-
- // Verify the sample rate setup worked.
- if ( abs( srate - sampleRate ) > 100 ) {
- close( fd );
- errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") does not support sample rate (" << sampleRate << ").";
- errorText_ = errorStream_.str();
- return FAILURE;
- }
- stream_.sampleRate = sampleRate;
-
- if ( mode == INPUT && stream_.mode == OUTPUT && stream_.device[0] == device) {
- // We're doing duplex setup here.
- stream_.deviceFormat[0] = stream_.deviceFormat[1];
- stream_.nDeviceChannels[0] = deviceChannels;
- }
-
- // Set interleaving parameters.
- stream_.userInterleaved = true;
- stream_.deviceInterleaved[mode] = true;
- if ( options && options->flags & RTAUDIO_NONINTERLEAVED )
- stream_.userInterleaved = false;
-
- // Set flags for buffer conversion
- stream_.doConvertBuffer[mode] = false;
- if ( stream_.userFormat != stream_.deviceFormat[mode] )
- stream_.doConvertBuffer[mode] = true;
- if ( stream_.nUserChannels[mode] < stream_.nDeviceChannels[mode] )
- stream_.doConvertBuffer[mode] = true;
- if ( stream_.userInterleaved != stream_.deviceInterleaved[mode] &&
- stream_.nUserChannels[mode] > 1 )
- stream_.doConvertBuffer[mode] = true;
-
- // Allocate the stream handles if necessary and then save.
- if ( stream_.apiHandle == 0 ) {
- try {
- handle = new OssHandle;
- }
- catch ( std::bad_alloc& ) {
- errorText_ = "RtApiOss::probeDeviceOpen: error allocating OssHandle memory.";
- goto error;
- }
-
- if ( pthread_cond_init( &handle->runnable, NULL ) ) {
- errorText_ = "RtApiOss::probeDeviceOpen: error initializing pthread condition variable.";
- goto error;
- }
-
- stream_.apiHandle = (void *) handle;
- }
- else {
- handle = (OssHandle *) stream_.apiHandle;
- }
- handle->id[mode] = fd;
-
- // Allocate necessary internal buffers.
- unsigned long bufferBytes;
- bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );
- stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );
- if ( stream_.userBuffer[mode] == NULL ) {
- errorText_ = "RtApiOss::probeDeviceOpen: error allocating user buffer memory.";
- goto error;
- }
-
- if ( stream_.doConvertBuffer[mode] ) {
-
- bool makeBuffer = true;
- bufferBytes = stream_.nDeviceChannels[mode] * formatBytes( stream_.deviceFormat[mode] );
- if ( mode == INPUT ) {
- if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {
- unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );
- if ( bufferBytes <= bytesOut ) makeBuffer = false;
- }
- }
-
- if ( makeBuffer ) {
- bufferBytes *= *bufferSize;
- if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );
- stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );
- if ( stream_.deviceBuffer == NULL ) {
- errorText_ = "RtApiOss::probeDeviceOpen: error allocating device buffer memory.";
- goto error;
- }
- }
- }
-
- stream_.device[mode] = device;
- stream_.state = STREAM_STOPPED;
-
- // Setup the buffer conversion information structure.
- if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, firstChannel );
-
- // Setup thread if necessary.
- if ( stream_.mode == OUTPUT && mode == INPUT ) {
- // We had already set up an output stream.
- stream_.mode = DUPLEX;
- if ( stream_.device[0] == device ) handle->id[0] = fd;
- }
- else {
- stream_.mode = mode;
-
- // Setup callback thread.
- stream_.callbackInfo.object = (void *) this;
-
- // Set the thread attributes for joinable and realtime scheduling
- // priority. The higher priority will only take affect if the
- // program is run as root or suid.
- pthread_attr_t attr;
- pthread_attr_init( &attr );
- pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_JOINABLE );
-#ifdef SCHED_RR // Undefined with some OSes (eg: NetBSD 1.6.x with GNU Pthread)
- if ( options && options->flags & RTAUDIO_SCHEDULE_REALTIME ) {
- struct sched_param param;
- int priority = options->priority;
- int min = sched_get_priority_min( SCHED_RR );
- int max = sched_get_priority_max( SCHED_RR );
- if ( priority < min ) priority = min;
- else if ( priority > max ) priority = max;
- param.sched_priority = priority;
- pthread_attr_setschedparam( &attr, ¶m );
- pthread_attr_setschedpolicy( &attr, SCHED_RR );
- }
- else
- pthread_attr_setschedpolicy( &attr, SCHED_OTHER );
-#else
- pthread_attr_setschedpolicy( &attr, SCHED_OTHER );
-#endif
-
- stream_.callbackInfo.isRunning = true;
- result = pthread_create( &stream_.callbackInfo.thread, &attr, ossCallbackHandler, &stream_.callbackInfo );
- pthread_attr_destroy( &attr );
- if ( result ) {
- stream_.callbackInfo.isRunning = false;
- errorText_ = "RtApiOss::error creating callback thread!";
- goto error;
- }
- }
-
- return SUCCESS;
-
- error:
- if ( handle ) {
- pthread_cond_destroy( &handle->runnable );
- if ( handle->id[0] ) close( handle->id[0] );
- if ( handle->id[1] ) close( handle->id[1] );
- delete handle;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- return FAILURE;
-}
-
-void RtApiOss :: closeStream()
-{
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiOss::closeStream(): no open stream to close!";
- error( RtError::WARNING );
- return;
- }
-
- OssHandle *handle = (OssHandle *) stream_.apiHandle;
- stream_.callbackInfo.isRunning = false;
- MUTEX_LOCK( &stream_.mutex );
- if ( stream_.state == STREAM_STOPPED )
- pthread_cond_signal( &handle->runnable );
- MUTEX_UNLOCK( &stream_.mutex );
- pthread_join( stream_.callbackInfo.thread, NULL );
-
- if ( stream_.state == STREAM_RUNNING ) {
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX )
- ioctl( handle->id[0], SNDCTL_DSP_HALT, 0 );
- else
- ioctl( handle->id[1], SNDCTL_DSP_HALT, 0 );
- stream_.state = STREAM_STOPPED;
- }
-
- if ( handle ) {
- pthread_cond_destroy( &handle->runnable );
- if ( handle->id[0] ) close( handle->id[0] );
- if ( handle->id[1] ) close( handle->id[1] );
- delete handle;
- stream_.apiHandle = 0;
- }
-
- for ( int i=0; i<2; i++ ) {
- if ( stream_.userBuffer[i] ) {
- free( stream_.userBuffer[i] );
- stream_.userBuffer[i] = 0;
- }
- }
-
- if ( stream_.deviceBuffer ) {
- free( stream_.deviceBuffer );
- stream_.deviceBuffer = 0;
- }
-
- stream_.mode = UNINITIALIZED;
- stream_.state = STREAM_CLOSED;
-}
-
-void RtApiOss :: startStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_RUNNING ) {
- errorText_ = "RtApiOss::startStream(): the stream is already running!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- stream_.state = STREAM_RUNNING;
-
- // No need to do anything else here ... OSS automatically starts
- // when fed samples.
-
- MUTEX_UNLOCK( &stream_.mutex );
-
- OssHandle *handle = (OssHandle *) stream_.apiHandle;
- pthread_cond_signal( &handle->runnable );
-}
-
-void RtApiOss :: stopStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiOss::stopStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- // The state might change while waiting on a mutex.
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
-
- int result = 0;
- OssHandle *handle = (OssHandle *) stream_.apiHandle;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
-
- // Flush the output with zeros a few times.
- char *buffer;
- int samples;
- RtAudioFormat format;
-
- if ( stream_.doConvertBuffer[0] ) {
- buffer = stream_.deviceBuffer;
- samples = stream_.bufferSize * stream_.nDeviceChannels[0];
- format = stream_.deviceFormat[0];
- }
- else {
- buffer = stream_.userBuffer[0];
- samples = stream_.bufferSize * stream_.nUserChannels[0];
- format = stream_.userFormat;
- }
-
- memset( buffer, 0, samples * formatBytes(format) );
- for ( unsigned int i=0; i<stream_.nBuffers+1; i++ ) {
- result = write( handle->id[0], buffer, samples * formatBytes(format) );
- if ( result == -1 ) {
- errorText_ = "RtApiOss::stopStream: audio write error.";
- error( RtError::WARNING );
- }
- }
-
- result = ioctl( handle->id[0], SNDCTL_DSP_HALT, 0 );
- if ( result == -1 ) {
- errorStream_ << "RtApiOss::stopStream: system error stopping callback procedure on device (" << stream_.device[0] << ").";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- handle->triggered = false;
- }
-
- if ( stream_.mode == INPUT || ( stream_.mode == DUPLEX && handle->id[0] != handle->id[1] ) ) {
- result = ioctl( handle->id[1], SNDCTL_DSP_HALT, 0 );
- if ( result == -1 ) {
- errorStream_ << "RtApiOss::stopStream: system error stopping input callback procedure on device (" << stream_.device[0] << ").";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- unlock:
- stream_.state = STREAM_STOPPED;
- MUTEX_UNLOCK( &stream_.mutex );
-
- if ( result != -1 ) return;
- error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiOss :: abortStream()
-{
- verifyStream();
- if ( stream_.state == STREAM_STOPPED ) {
- errorText_ = "RtApiOss::abortStream(): the stream is already stopped!";
- error( RtError::WARNING );
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- // The state might change while waiting on a mutex.
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
-
- int result = 0;
- OssHandle *handle = (OssHandle *) stream_.apiHandle;
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
- result = ioctl( handle->id[0], SNDCTL_DSP_HALT, 0 );
- if ( result == -1 ) {
- errorStream_ << "RtApiOss::abortStream: system error stopping callback procedure on device (" << stream_.device[0] << ").";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- handle->triggered = false;
- }
-
- if ( stream_.mode == INPUT || ( stream_.mode == DUPLEX && handle->id[0] != handle->id[1] ) ) {
- result = ioctl( handle->id[1], SNDCTL_DSP_HALT, 0 );
- if ( result == -1 ) {
- errorStream_ << "RtApiOss::abortStream: system error stopping input callback procedure on device (" << stream_.device[0] << ").";
- errorText_ = errorStream_.str();
- goto unlock;
- }
- }
-
- unlock:
- stream_.state = STREAM_STOPPED;
- MUTEX_UNLOCK( &stream_.mutex );
-
- if ( result != -1 ) return;
- error( RtError::SYSTEM_ERROR );
-}
-
-void RtApiOss :: callbackEvent()
-{
- OssHandle *handle = (OssHandle *) stream_.apiHandle;
- if ( stream_.state == STREAM_STOPPED ) {
- MUTEX_LOCK( &stream_.mutex );
- pthread_cond_wait( &handle->runnable, &stream_.mutex );
- if ( stream_.state != STREAM_RUNNING ) {
- MUTEX_UNLOCK( &stream_.mutex );
- return;
- }
- MUTEX_UNLOCK( &stream_.mutex );
- }
-
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApiOss::callbackEvent(): the stream is closed ... this shouldn't happen!";
- error( RtError::WARNING );
- return;
- }
-
- // Invoke user callback to get fresh output data.
- int doStopStream = 0;
- RtAudioCallback callback = (RtAudioCallback) stream_.callbackInfo.callback;
- double streamTime = getStreamTime();
- RtAudioStreamStatus status = 0;
- if ( stream_.mode != INPUT && handle->xrun[0] == true ) {
- status |= RTAUDIO_OUTPUT_UNDERFLOW;
- handle->xrun[0] = false;
- }
- if ( stream_.mode != OUTPUT && handle->xrun[1] == true ) {
- status |= RTAUDIO_INPUT_OVERFLOW;
- handle->xrun[1] = false;
- }
- doStopStream = callback( stream_.userBuffer[0], stream_.userBuffer[1],
- stream_.bufferSize, streamTime, status, stream_.callbackInfo.userData );
- if ( doStopStream == 2 ) {
- this->abortStream();
- return;
- }
-
- MUTEX_LOCK( &stream_.mutex );
-
- // The state might change while waiting on a mutex.
- if ( stream_.state == STREAM_STOPPED ) goto unlock;
-
- int result;
- char *buffer;
- int samples;
- RtAudioFormat format;
-
- if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
-
- // Setup parameters and do buffer conversion if necessary.
- if ( stream_.doConvertBuffer[0] ) {
- buffer = stream_.deviceBuffer;
- convertBuffer( buffer, stream_.userBuffer[0], stream_.convertInfo[0] );
- samples = stream_.bufferSize * stream_.nDeviceChannels[0];
- format = stream_.deviceFormat[0];
- }
- else {
- buffer = stream_.userBuffer[0];
- samples = stream_.bufferSize * stream_.nUserChannels[0];
- format = stream_.userFormat;
- }
-
- // Do byte swapping if necessary.
- if ( stream_.doByteSwap[0] )
- byteSwapBuffer( buffer, samples, format );
-
- if ( stream_.mode == DUPLEX && handle->triggered == false ) {
- int trig = 0;
- ioctl( handle->id[0], SNDCTL_DSP_SETTRIGGER, &trig );
- result = write( handle->id[0], buffer, samples * formatBytes(format) );
- trig = PCM_ENABLE_INPUT|PCM_ENABLE_OUTPUT;
- ioctl( handle->id[0], SNDCTL_DSP_SETTRIGGER, &trig );
- handle->triggered = true;
- }
- else
- // Write samples to device.
- result = write( handle->id[0], buffer, samples * formatBytes(format) );
-
- if ( result == -1 ) {
- // We'll assume this is an underrun, though there isn't a
- // specific means for determining that.
- handle->xrun[0] = true;
- errorText_ = "RtApiOss::callbackEvent: audio write error.";
- error( RtError::WARNING );
- // Continue on to input section.
- }
- }
-
- if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {
-
- // Setup parameters.
- if ( stream_.doConvertBuffer[1] ) {
- buffer = stream_.deviceBuffer;
- samples = stream_.bufferSize * stream_.nDeviceChannels[1];
- format = stream_.deviceFormat[1];
- }
- else {
- buffer = stream_.userBuffer[1];
- samples = stream_.bufferSize * stream_.nUserChannels[1];
- format = stream_.userFormat;
- }
-
- // Read samples from device.
- result = read( handle->id[1], buffer, samples * formatBytes(format) );
-
- if ( result == -1 ) {
- // We'll assume this is an overrun, though there isn't a
- // specific means for determining that.
- handle->xrun[1] = true;
- errorText_ = "RtApiOss::callbackEvent: audio read error.";
- error( RtError::WARNING );
- goto unlock;
- }
-
- // Do byte swapping if necessary.
- if ( stream_.doByteSwap[1] )
- byteSwapBuffer( buffer, samples, format );
-
- // Do buffer conversion if necessary.
- if ( stream_.doConvertBuffer[1] )
- convertBuffer( stream_.userBuffer[1], stream_.deviceBuffer, stream_.convertInfo[1] );
- }
-
- unlock:
- MUTEX_UNLOCK( &stream_.mutex );
-
- RtApi::tickStreamTime();
- if ( doStopStream == 1 ) this->stopStream();
-}
-
-extern "C" void *ossCallbackHandler( void *ptr )
-{
- CallbackInfo *info = (CallbackInfo *) ptr;
- RtApiOss *object = (RtApiOss *) info->object;
- bool *isRunning = &info->isRunning;
-
- while ( *isRunning == true ) {
- pthread_testcancel();
- object->callbackEvent();
- }
-
- pthread_exit( NULL );
-}
-
-//******************** End of __LINUX_OSS__ *********************//
-#endif
-
-
-// *************************************************** //
-//
-// Protected common (OS-independent) RtAudio methods.
-//
-// *************************************************** //
-
-// This method can be modified to control the behavior of error
-// message printing.
-void RtApi :: error( RtError::Type type )
-{
- errorStream_.str(""); // clear the ostringstream
- if ( type == RtError::WARNING && showWarnings_ == true )
- std::cerr << '\n' << errorText_ << "\n\n";
- else
- throw( RtError( errorText_, type ) );
-}
-
-void RtApi :: verifyStream()
-{
- if ( stream_.state == STREAM_CLOSED ) {
- errorText_ = "RtApi:: a stream is not open!";
- error( RtError::INVALID_USE );
- }
-}
-
-void RtApi :: clearStreamInfo()
-{
- stream_.mode = UNINITIALIZED;
- stream_.state = STREAM_CLOSED;
- stream_.sampleRate = 0;
- stream_.bufferSize = 0;
- stream_.nBuffers = 0;
- stream_.userFormat = 0;
- stream_.userInterleaved = true;
- stream_.streamTime = 0.0;
- stream_.apiHandle = 0;
- stream_.deviceBuffer = 0;
- stream_.callbackInfo.callback = 0;
- stream_.callbackInfo.userData = 0;
- stream_.callbackInfo.isRunning = false;
- for ( int i=0; i<2; i++ ) {
- stream_.device[i] = 11111;
- stream_.doConvertBuffer[i] = false;
- stream_.deviceInterleaved[i] = true;
- stream_.doByteSwap[i] = false;
- stream_.nUserChannels[i] = 0;
- stream_.nDeviceChannels[i] = 0;
- stream_.channelOffset[i] = 0;
- stream_.deviceFormat[i] = 0;
- stream_.latency[i] = 0;
- stream_.userBuffer[i] = 0;
- stream_.convertInfo[i].channels = 0;
- stream_.convertInfo[i].inJump = 0;
- stream_.convertInfo[i].outJump = 0;
- stream_.convertInfo[i].inFormat = 0;
- stream_.convertInfo[i].outFormat = 0;
- stream_.convertInfo[i].inOffset.clear();
- stream_.convertInfo[i].outOffset.clear();
- }
-}
-
-unsigned int RtApi :: formatBytes( RtAudioFormat format )
-{
- if ( format == RTAUDIO_SINT16 )
- return 2;
- else if ( format == RTAUDIO_SINT24 || format == RTAUDIO_SINT32 ||
- format == RTAUDIO_FLOAT32 )
- return 4;
- else if ( format == RTAUDIO_FLOAT64 )
- return 8;
- else if ( format == RTAUDIO_SINT8 )
- return 1;
-
- errorText_ = "RtApi::formatBytes: undefined format.";
- error( RtError::WARNING );
-
- return 0;
-}
-
-void RtApi :: setConvertInfo( StreamMode mode, unsigned int firstChannel )
-{
- if ( mode == INPUT ) { // convert device to user buffer
- stream_.convertInfo[mode].inJump = stream_.nDeviceChannels[1];
- stream_.convertInfo[mode].outJump = stream_.nUserChannels[1];
- stream_.convertInfo[mode].inFormat = stream_.deviceFormat[1];
- stream_.convertInfo[mode].outFormat = stream_.userFormat;
- }
- else { // convert user to device buffer
- stream_.convertInfo[mode].inJump = stream_.nUserChannels[0];
- stream_.convertInfo[mode].outJump = stream_.nDeviceChannels[0];
- stream_.convertInfo[mode].inFormat = stream_.userFormat;
- stream_.convertInfo[mode].outFormat = stream_.deviceFormat[0];
- }
-
- if ( stream_.convertInfo[mode].inJump < stream_.convertInfo[mode].outJump )
- stream_.convertInfo[mode].channels = stream_.convertInfo[mode].inJump;
- else
- stream_.convertInfo[mode].channels = stream_.convertInfo[mode].outJump;
-
- // Set up the interleave/deinterleave offsets.
- if ( stream_.deviceInterleaved[mode] != stream_.userInterleaved ) {
- if ( ( mode == OUTPUT && stream_.deviceInterleaved[mode] ) ||
- ( mode == INPUT && stream_.userInterleaved ) ) {
- for ( int k=0; k<stream_.convertInfo[mode].channels; k++ ) {
- stream_.convertInfo[mode].inOffset.push_back( k * stream_.bufferSize );
- stream_.convertInfo[mode].outOffset.push_back( k );
- stream_.convertInfo[mode].inJump = 1;
- }
- }
- else {
- for ( int k=0; k<stream_.convertInfo[mode].channels; k++ ) {
- stream_.convertInfo[mode].inOffset.push_back( k );
- stream_.convertInfo[mode].outOffset.push_back( k * stream_.bufferSize );
- stream_.convertInfo[mode].outJump = 1;
- }
- }
- }
- else { // no (de)interleaving
- if ( stream_.userInterleaved ) {
- for ( int k=0; k<stream_.convertInfo[mode].channels; k++ ) {
- stream_.convertInfo[mode].inOffset.push_back( k );
- stream_.convertInfo[mode].outOffset.push_back( k );
- }
- }
- else {
- for ( int k=0; k<stream_.convertInfo[mode].channels; k++ ) {
- stream_.convertInfo[mode].inOffset.push_back( k * stream_.bufferSize );
- stream_.convertInfo[mode].outOffset.push_back( k * stream_.bufferSize );
- stream_.convertInfo[mode].inJump = 1;
- stream_.convertInfo[mode].outJump = 1;
- }
- }
- }
-
- // Add channel offset.
- if ( firstChannel > 0 ) {
- if ( stream_.deviceInterleaved[mode] ) {
- if ( mode == OUTPUT ) {
- for ( int k=0; k<stream_.convertInfo[mode].channels; k++ )
- stream_.convertInfo[mode].outOffset[k] += firstChannel;
- }
- else {
- for ( int k=0; k<stream_.convertInfo[mode].channels; k++ )
- stream_.convertInfo[mode].inOffset[k] += firstChannel;
- }
- }
- else {
- if ( mode == OUTPUT ) {
- for ( int k=0; k<stream_.convertInfo[mode].channels; k++ )
- stream_.convertInfo[mode].outOffset[k] += ( firstChannel * stream_.bufferSize );
- }
- else {
- for ( int k=0; k<stream_.convertInfo[mode].channels; k++ )
- stream_.convertInfo[mode].inOffset[k] += ( firstChannel * stream_.bufferSize );
- }
- }
- }
-}
-
-void RtApi :: convertBuffer( char *outBuffer, char *inBuffer, ConvertInfo &info )
-{
- // This function does format conversion, input/output channel compensation, and
- // data interleaving/deinterleaving. 24-bit integers are assumed to occupy
- // the lower three bytes of a 32-bit integer.
-
- // Clear our device buffer when in/out duplex device channels are different
- if ( outBuffer == stream_.deviceBuffer && stream_.mode == DUPLEX &&
- ( stream_.nDeviceChannels[0] < stream_.nDeviceChannels[1] ) )
- memset( outBuffer, 0, stream_.bufferSize * info.outJump * formatBytes( info.outFormat ) );
-
- int j;
- if (info.outFormat == RTAUDIO_FLOAT64) {
- Float64 scale;
- Float64 *out = (Float64 *)outBuffer;
-
- if (info.inFormat == RTAUDIO_SINT8) {
- signed char *in = (signed char *)inBuffer;
- scale = 1.0 / 127.5;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Float64) in[info.inOffset[j]];
- out[info.outOffset[j]] += 0.5;
- out[info.outOffset[j]] *= scale;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT16) {
- Int16 *in = (Int16 *)inBuffer;
- scale = 1.0 / 32767.5;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Float64) in[info.inOffset[j]];
- out[info.outOffset[j]] += 0.5;
- out[info.outOffset[j]] *= scale;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT24) {
- Int32 *in = (Int32 *)inBuffer;
- scale = 1.0 / 8388607.5;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Float64) (in[info.inOffset[j]] & 0x00ffffff);
- out[info.outOffset[j]] += 0.5;
- out[info.outOffset[j]] *= scale;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT32) {
- Int32 *in = (Int32 *)inBuffer;
- scale = 1.0 / 2147483647.5;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Float64) in[info.inOffset[j]];
- out[info.outOffset[j]] += 0.5;
- out[info.outOffset[j]] *= scale;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT32) {
- Float32 *in = (Float32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Float64) in[info.inOffset[j]];
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT64) {
- // Channel compensation and/or (de)interleaving only.
- Float64 *in = (Float64 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = in[info.inOffset[j]];
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- }
- else if (info.outFormat == RTAUDIO_FLOAT32) {
- Float32 scale;
- Float32 *out = (Float32 *)outBuffer;
-
- if (info.inFormat == RTAUDIO_SINT8) {
- signed char *in = (signed char *)inBuffer;
- scale = (Float32) ( 1.0 / 127.5 );
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Float32) in[info.inOffset[j]];
- out[info.outOffset[j]] += 0.5;
- out[info.outOffset[j]] *= scale;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT16) {
- Int16 *in = (Int16 *)inBuffer;
- scale = (Float32) ( 1.0 / 32767.5 );
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Float32) in[info.inOffset[j]];
- out[info.outOffset[j]] += 0.5;
- out[info.outOffset[j]] *= scale;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT24) {
- Int32 *in = (Int32 *)inBuffer;
- scale = (Float32) ( 1.0 / 8388607.5 );
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Float32) (in[info.inOffset[j]] & 0x00ffffff);
- out[info.outOffset[j]] += 0.5;
- out[info.outOffset[j]] *= scale;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT32) {
- Int32 *in = (Int32 *)inBuffer;
- scale = (Float32) ( 1.0 / 2147483647.5 );
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Float32) in[info.inOffset[j]];
- out[info.outOffset[j]] += 0.5;
- out[info.outOffset[j]] *= scale;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT32) {
- // Channel compensation and/or (de)interleaving only.
- Float32 *in = (Float32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = in[info.inOffset[j]];
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT64) {
- Float64 *in = (Float64 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Float32) in[info.inOffset[j]];
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- }
- else if (info.outFormat == RTAUDIO_SINT32) {
- Int32 *out = (Int32 *)outBuffer;
- if (info.inFormat == RTAUDIO_SINT8) {
- signed char *in = (signed char *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];
- out[info.outOffset[j]] <<= 24;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT16) {
- Int16 *in = (Int16 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];
- out[info.outOffset[j]] <<= 16;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT24) { // Hmmm ... we could just leave it in the lower 3 bytes
- Int32 *in = (Int32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];
- out[info.outOffset[j]] <<= 8;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT32) {
- // Channel compensation and/or (de)interleaving only.
- Int32 *in = (Int32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = in[info.inOffset[j]];
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT32) {
- Float32 *in = (Float32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int32) (in[info.inOffset[j]] * 2147483647.5 - 0.5);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT64) {
- Float64 *in = (Float64 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int32) (in[info.inOffset[j]] * 2147483647.5 - 0.5);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- }
- else if (info.outFormat == RTAUDIO_SINT24) {
- Int32 *out = (Int32 *)outBuffer;
- if (info.inFormat == RTAUDIO_SINT8) {
- signed char *in = (signed char *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];
- out[info.outOffset[j]] <<= 16;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT16) {
- Int16 *in = (Int16 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];
- out[info.outOffset[j]] <<= 8;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT24) {
- // Channel compensation and/or (de)interleaving only.
- Int32 *in = (Int32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = in[info.inOffset[j]];
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT32) {
- Int32 *in = (Int32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];
- out[info.outOffset[j]] >>= 8;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT32) {
- Float32 *in = (Float32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int32) (in[info.inOffset[j]] * 8388607.5 - 0.5);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT64) {
- Float64 *in = (Float64 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int32) (in[info.inOffset[j]] * 8388607.5 - 0.5);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- }
- else if (info.outFormat == RTAUDIO_SINT16) {
- Int16 *out = (Int16 *)outBuffer;
- if (info.inFormat == RTAUDIO_SINT8) {
- signed char *in = (signed char *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int16) in[info.inOffset[j]];
- out[info.outOffset[j]] <<= 8;
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT16) {
- // Channel compensation and/or (de)interleaving only.
- Int16 *in = (Int16 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = in[info.inOffset[j]];
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT24) {
- Int32 *in = (Int32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int16) ((in[info.inOffset[j]] >> 8) & 0x0000ffff);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT32) {
- Int32 *in = (Int32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int16) ((in[info.inOffset[j]] >> 16) & 0x0000ffff);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT32) {
- Float32 *in = (Float32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int16) (in[info.inOffset[j]] * 32767.5 - 0.5);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT64) {
- Float64 *in = (Float64 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (Int16) (in[info.inOffset[j]] * 32767.5 - 0.5);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- }
- else if (info.outFormat == RTAUDIO_SINT8) {
- signed char *out = (signed char *)outBuffer;
- if (info.inFormat == RTAUDIO_SINT8) {
- // Channel compensation and/or (de)interleaving only.
- signed char *in = (signed char *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = in[info.inOffset[j]];
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- if (info.inFormat == RTAUDIO_SINT16) {
- Int16 *in = (Int16 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (signed char) ((in[info.inOffset[j]] >> 8) & 0x00ff);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT24) {
- Int32 *in = (Int32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (signed char) ((in[info.inOffset[j]] >> 16) & 0x000000ff);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_SINT32) {
- Int32 *in = (Int32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (signed char) ((in[info.inOffset[j]] >> 24) & 0x000000ff);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT32) {
- Float32 *in = (Float32 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (signed char) (in[info.inOffset[j]] * 127.5 - 0.5);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- else if (info.inFormat == RTAUDIO_FLOAT64) {
- Float64 *in = (Float64 *)inBuffer;
- for (unsigned int i=0; i<stream_.bufferSize; i++) {
- for (j=0; j<info.channels; j++) {
- out[info.outOffset[j]] = (signed char) (in[info.inOffset[j]] * 127.5 - 0.5);
- }
- in += info.inJump;
- out += info.outJump;
- }
- }
- }
-}
-
- //static inline uint16_t bswap_16(uint16_t x) { return (x>>8) | (x<<8); }
- //static inline uint32_t bswap_32(uint32_t x) { return (bswap_16(x&0xffff)<<16) | (bswap_16(x>>16)); }
- //static inline uint64_t bswap_64(uint64_t x) { return (((unsigned long long)bswap_32(x&0xffffffffull))<<32) | (bswap_32(x>>32)); }
-
-void RtApi :: byteSwapBuffer( char *buffer, unsigned int samples, RtAudioFormat format )
-{
- register char val;
- register char *ptr;
-
- ptr = buffer;
- if ( format == RTAUDIO_SINT16 ) {
- for ( unsigned int i=0; i<samples; i++ ) {
- // Swap 1st and 2nd bytes.
- val = *(ptr);
- *(ptr) = *(ptr+1);
- *(ptr+1) = val;
-
- // Increment 2 bytes.
- ptr += 2;
- }
- }
- else if ( format == RTAUDIO_SINT24 ||
- format == RTAUDIO_SINT32 ||
- format == RTAUDIO_FLOAT32 ) {
- for ( unsigned int i=0; i<samples; i++ ) {
- // Swap 1st and 4th bytes.
- val = *(ptr);
- *(ptr) = *(ptr+3);
- *(ptr+3) = val;
-
- // Swap 2nd and 3rd bytes.
- ptr += 1;
- val = *(ptr);
- *(ptr) = *(ptr+1);
- *(ptr+1) = val;
-
- // Increment 3 more bytes.
- ptr += 3;
- }
- }
- else if ( format == RTAUDIO_FLOAT64 ) {
- for ( unsigned int i=0; i<samples; i++ ) {
- // Swap 1st and 8th bytes
- val = *(ptr);
- *(ptr) = *(ptr+7);
- *(ptr+7) = val;
-
- // Swap 2nd and 7th bytes
- ptr += 1;
- val = *(ptr);
- *(ptr) = *(ptr+5);
- *(ptr+5) = val;
-
- // Swap 3rd and 6th bytes
- ptr += 1;
- val = *(ptr);
- *(ptr) = *(ptr+3);
- *(ptr+3) = val;
-
- // Swap 4th and 5th bytes
- ptr += 1;
- val = *(ptr);
- *(ptr) = *(ptr+1);
- *(ptr+1) = val;
-
- // Increment 5 more bytes.
- ptr += 5;
- }
- }
-}
-
- // Indentation settings for Vim and Emacs
- //
- // Local Variables:
- // c-basic-offset: 2
- // indent-tabs-mode: nil
- // End:
- //
- // vim: et sts=2 sw=2
-
+/************************************************************************/\r
+/*! \class RtAudio\r
+ \brief Realtime audio i/o C++ classes.\r
+\r
+ RtAudio provides a common API (Application Programming Interface)\r
+ for realtime audio input/output across Linux (native ALSA, Jack,\r
+ and OSS), Macintosh OS X (CoreAudio and Jack), and Windows\r
+ (DirectSound and ASIO) operating systems.\r
+\r
+ RtAudio WWW site: http://www.music.mcgill.ca/~gary/rtaudio/\r
+\r
+ RtAudio: realtime audio i/o C++ classes\r
+ Copyright (c) 2001-2011 Gary P. Scavone\r
+\r
+ Permission is hereby granted, free of charge, to any person\r
+ obtaining a copy of this software and associated documentation files\r
+ (the "Software"), to deal in the Software without restriction,\r
+ including without limitation the rights to use, copy, modify, merge,\r
+ publish, distribute, sublicense, and/or sell copies of the Software,\r
+ and to permit persons to whom the Software is furnished to do so,\r
+ subject to the following conditions:\r
+\r
+ The above copyright notice and this permission notice shall be\r
+ included in all copies or substantial portions of the Software.\r
+\r
+ Any person wishing to distribute modifications to the Software is\r
+ asked to send the modifications to the original developer so that\r
+ they can be incorporated into the canonical version. This is,\r
+ however, not a binding provision of this license.\r
+\r
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,\r
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\r
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.\r
+ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR\r
+ ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF\r
+ CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION\r
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.\r
+*/\r
+/************************************************************************/\r
+\r
+// RtAudio: Version 4.0.8\r
+\r
+#include "RtAudio.h"\r
+#include <iostream>\r
+#include <cstdlib>\r
+#include <cstring>\r
+#include <climits>\r
+\r
+// Static variable definitions.\r
+const unsigned int RtApi::MAX_SAMPLE_RATES = 14;\r
+const unsigned int RtApi::SAMPLE_RATES[] = {\r
+ 4000, 5512, 8000, 9600, 11025, 16000, 22050,\r
+ 32000, 44100, 48000, 88200, 96000, 176400, 192000\r
+};\r
+\r
+#if defined(__WINDOWS_DS__) || defined(__WINDOWS_ASIO__)\r
+ #define MUTEX_INITIALIZE(A) InitializeCriticalSection(A)\r
+ #define MUTEX_DESTROY(A) DeleteCriticalSection(A)\r
+ #define MUTEX_LOCK(A) EnterCriticalSection(A)\r
+ #define MUTEX_UNLOCK(A) LeaveCriticalSection(A)\r
+#elif defined(__LINUX_ALSA__) || defined(__UNIX_JACK__) || defined(__LINUX_OSS__) || defined(__MACOSX_CORE__)\r
+ // pthread API\r
+ #define MUTEX_INITIALIZE(A) pthread_mutex_init(A, NULL)\r
+ #define MUTEX_DESTROY(A) pthread_mutex_destroy(A)\r
+ #define MUTEX_LOCK(A) pthread_mutex_lock(A)\r
+ #define MUTEX_UNLOCK(A) pthread_mutex_unlock(A)\r
+#else\r
+ #define MUTEX_INITIALIZE(A) abs(*A) // dummy definitions\r
+ #define MUTEX_DESTROY(A) abs(*A) // dummy definitions\r
+#endif\r
+\r
+// *************************************************** //\r
+//\r
+// RtAudio definitions.\r
+//\r
+// *************************************************** //\r
+\r
+void RtAudio :: getCompiledApi( std::vector<RtAudio::Api> &apis ) throw()\r
+{\r
+ apis.clear();\r
+\r
+ // The order here will control the order of RtAudio's API search in\r
+ // the constructor.\r
+#if defined(__UNIX_JACK__)\r
+ apis.push_back( UNIX_JACK );\r
+#endif\r
+#if defined(__LINUX_ALSA__)\r
+ apis.push_back( LINUX_ALSA );\r
+#endif\r
+#if defined(__LINUX_OSS__)\r
+ apis.push_back( LINUX_OSS );\r
+#endif\r
+#if defined(__WINDOWS_ASIO__)\r
+ apis.push_back( WINDOWS_ASIO );\r
+#endif\r
+#if defined(__WINDOWS_DS__)\r
+ apis.push_back( WINDOWS_DS );\r
+#endif\r
+#if defined(__MACOSX_CORE__)\r
+ apis.push_back( MACOSX_CORE );\r
+#endif\r
+#if defined(__RTAUDIO_DUMMY__)\r
+ apis.push_back( RTAUDIO_DUMMY );\r
+#endif\r
+}\r
+\r
+void RtAudio :: openRtApi( RtAudio::Api api )\r
+{\r
+#if defined(__UNIX_JACK__)\r
+ if ( api == UNIX_JACK )\r
+ rtapi_ = new RtApiJack();\r
+#endif\r
+#if defined(__LINUX_ALSA__)\r
+ if ( api == LINUX_ALSA )\r
+ rtapi_ = new RtApiAlsa();\r
+#endif\r
+#if defined(__LINUX_OSS__)\r
+ if ( api == LINUX_OSS )\r
+ rtapi_ = new RtApiOss();\r
+#endif\r
+#if defined(__WINDOWS_ASIO__)\r
+ if ( api == WINDOWS_ASIO )\r
+ rtapi_ = new RtApiAsio();\r
+#endif\r
+#if defined(__WINDOWS_DS__)\r
+ if ( api == WINDOWS_DS )\r
+ rtapi_ = new RtApiDs();\r
+#endif\r
+#if defined(__MACOSX_CORE__)\r
+ if ( api == MACOSX_CORE )\r
+ rtapi_ = new RtApiCore();\r
+#endif\r
+#if defined(__RTAUDIO_DUMMY__)\r
+ if ( api == RTAUDIO_DUMMY )\r
+ rtapi_ = new RtApiDummy();\r
+#endif\r
+}\r
+\r
+RtAudio :: RtAudio( RtAudio::Api api ) throw()\r
+{\r
+ rtapi_ = 0;\r
+\r
+ if ( api != UNSPECIFIED ) {\r
+ // Attempt to open the specified API.\r
+ openRtApi( api );\r
+ if ( rtapi_ ) return;\r
+\r
+ // No compiled support for specified API value. Issue a debug\r
+ // warning and continue as if no API was specified.\r
+ std::cerr << "\nRtAudio: no compiled support for specified API argument!\n" << std::endl;\r
+ }\r
+\r
+ // Iterate through the compiled APIs and return as soon as we find\r
+ // one with at least one device or we reach the end of the list.\r
+ std::vector< RtAudio::Api > apis;\r
+ getCompiledApi( apis );\r
+ for ( unsigned int i=0; i<apis.size(); i++ ) {\r
+ openRtApi( apis[i] );\r
+ if ( rtapi_->getDeviceCount() ) break;\r
+ }\r
+\r
+ if ( rtapi_ ) return;\r
+\r
+ // It should not be possible to get here because the preprocessor\r
+ // definition __RTAUDIO_DUMMY__ is automatically defined if no\r
+ // API-specific definitions are passed to the compiler. But just in\r
+ // case something weird happens, we'll print out an error message.\r
+ std::cerr << "\nRtAudio: no compiled API support found ... critical error!!\n\n";\r
+}\r
+\r
+RtAudio :: ~RtAudio() throw()\r
+{\r
+ delete rtapi_;\r
+}\r
+\r
+void RtAudio :: openStream( RtAudio::StreamParameters *outputParameters,\r
+ RtAudio::StreamParameters *inputParameters,\r
+ RtAudioFormat format, unsigned int sampleRate,\r
+ unsigned int *bufferFrames,\r
+ RtAudioCallback callback, void *userData,\r
+ RtAudio::StreamOptions *options )\r
+{\r
+ return rtapi_->openStream( outputParameters, inputParameters, format,\r
+ sampleRate, bufferFrames, callback,\r
+ userData, options );\r
+}\r
+\r
+// *************************************************** //\r
+//\r
+// Public RtApi definitions (see end of file for\r
+// private or protected utility functions).\r
+//\r
+// *************************************************** //\r
+\r
+RtApi :: RtApi()\r
+{\r
+ stream_.state = STREAM_CLOSED;\r
+ stream_.mode = UNINITIALIZED;\r
+ stream_.apiHandle = 0;\r
+ stream_.userBuffer[0] = 0;\r
+ stream_.userBuffer[1] = 0;\r
+ MUTEX_INITIALIZE( &stream_.mutex );\r
+ showWarnings_ = true;\r
+}\r
+\r
+RtApi :: ~RtApi()\r
+{\r
+ MUTEX_DESTROY( &stream_.mutex );\r
+}\r
+\r
+void RtApi :: openStream( RtAudio::StreamParameters *oParams,\r
+ RtAudio::StreamParameters *iParams,\r
+ RtAudioFormat format, unsigned int sampleRate,\r
+ unsigned int *bufferFrames,\r
+ RtAudioCallback callback, void *userData,\r
+ RtAudio::StreamOptions *options )\r
+{\r
+ if ( stream_.state != STREAM_CLOSED ) {\r
+ errorText_ = "RtApi::openStream: a stream is already open!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ if ( oParams && oParams->nChannels < 1 ) {\r
+ errorText_ = "RtApi::openStream: a non-NULL output StreamParameters structure cannot have an nChannels value less than one.";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ if ( iParams && iParams->nChannels < 1 ) {\r
+ errorText_ = "RtApi::openStream: a non-NULL input StreamParameters structure cannot have an nChannels value less than one.";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ if ( oParams == NULL && iParams == NULL ) {\r
+ errorText_ = "RtApi::openStream: input and output StreamParameters structures are both NULL!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ if ( formatBytes(format) == 0 ) {\r
+ errorText_ = "RtApi::openStream: 'format' parameter value is undefined.";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ unsigned int nDevices = getDeviceCount();\r
+ unsigned int oChannels = 0;\r
+ if ( oParams ) {\r
+ oChannels = oParams->nChannels;\r
+ if ( oParams->deviceId >= nDevices ) {\r
+ errorText_ = "RtApi::openStream: output device parameter value is invalid.";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+ }\r
+\r
+ unsigned int iChannels = 0;\r
+ if ( iParams ) {\r
+ iChannels = iParams->nChannels;\r
+ if ( iParams->deviceId >= nDevices ) {\r
+ errorText_ = "RtApi::openStream: input device parameter value is invalid.";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+ }\r
+\r
+ clearStreamInfo();\r
+ bool result;\r
+\r
+ if ( oChannels > 0 ) {\r
+\r
+ result = probeDeviceOpen( oParams->deviceId, OUTPUT, oChannels, oParams->firstChannel,\r
+ sampleRate, format, bufferFrames, options );\r
+ if ( result == false ) error( RtError::SYSTEM_ERROR );\r
+ }\r
+\r
+ if ( iChannels > 0 ) {\r
+\r
+ result = probeDeviceOpen( iParams->deviceId, INPUT, iChannels, iParams->firstChannel,\r
+ sampleRate, format, bufferFrames, options );\r
+ if ( result == false ) {\r
+ if ( oChannels > 0 ) closeStream();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+ }\r
+\r
+ stream_.callbackInfo.callback = (void *) callback;\r
+ stream_.callbackInfo.userData = userData;\r
+\r
+ if ( options ) options->numberOfBuffers = stream_.nBuffers;\r
+ stream_.state = STREAM_STOPPED;\r
+}\r
+\r
+unsigned int RtApi :: getDefaultInputDevice( void )\r
+{\r
+ // Should be implemented in subclasses if possible.\r
+ return 0;\r
+}\r
+\r
+unsigned int RtApi :: getDefaultOutputDevice( void )\r
+{\r
+ // Should be implemented in subclasses if possible.\r
+ return 0;\r
+}\r
+\r
+void RtApi :: closeStream( void )\r
+{\r
+ // MUST be implemented in subclasses!\r
+ return;\r
+}\r
+\r
+bool RtApi :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,\r
+ unsigned int firstChannel, unsigned int sampleRate,\r
+ RtAudioFormat format, unsigned int *bufferSize,\r
+ RtAudio::StreamOptions *options )\r
+{\r
+ // MUST be implemented in subclasses!\r
+ return FAILURE;\r
+}\r
+\r
+void RtApi :: tickStreamTime( void )\r
+{\r
+ // Subclasses that do not provide their own implementation of\r
+ // getStreamTime should call this function once per buffer I/O to\r
+ // provide basic stream time support.\r
+\r
+ stream_.streamTime += ( stream_.bufferSize * 1.0 / stream_.sampleRate );\r
+\r
+#if defined( HAVE_GETTIMEOFDAY )\r
+ gettimeofday( &stream_.lastTickTimestamp, NULL );\r
+#endif\r
+}\r
+\r
+long RtApi :: getStreamLatency( void )\r
+{\r
+ verifyStream();\r
+\r
+ long totalLatency = 0;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX )\r
+ totalLatency = stream_.latency[0];\r
+ if ( stream_.mode == INPUT || stream_.mode == DUPLEX )\r
+ totalLatency += stream_.latency[1];\r
+\r
+ return totalLatency;\r
+}\r
+\r
+double RtApi :: getStreamTime( void )\r
+{\r
+ verifyStream();\r
+\r
+#if defined( HAVE_GETTIMEOFDAY )\r
+ // Return a very accurate estimate of the stream time by\r
+ // adding in the elapsed time since the last tick.\r
+ struct timeval then;\r
+ struct timeval now;\r
+\r
+ if ( stream_.state != STREAM_RUNNING || stream_.streamTime == 0.0 )\r
+ return stream_.streamTime;\r
+\r
+ gettimeofday( &now, NULL );\r
+ then = stream_.lastTickTimestamp;\r
+ return stream_.streamTime +\r
+ ((now.tv_sec + 0.000001 * now.tv_usec) -\r
+ (then.tv_sec + 0.000001 * then.tv_usec)); \r
+#else\r
+ return stream_.streamTime;\r
+#endif\r
+}\r
+\r
+unsigned int RtApi :: getStreamSampleRate( void )\r
+{\r
+ verifyStream();\r
+\r
+ return stream_.sampleRate;\r
+}\r
+\r
+\r
+// *************************************************** //\r
+//\r
+// OS/API-specific methods.\r
+//\r
+// *************************************************** //\r
+\r
+#if defined(__MACOSX_CORE__)\r
+\r
+// The OS X CoreAudio API is designed to use a separate callback\r
+// procedure for each of its audio devices. A single RtAudio duplex\r
+// stream using two different devices is supported here, though it\r
+// cannot be guaranteed to always behave correctly because we cannot\r
+// synchronize these two callbacks.\r
+//\r
+// A property listener is installed for over/underrun information.\r
+// However, no functionality is currently provided to allow property\r
+// listeners to trigger user handlers because it is unclear what could\r
+// be done if a critical stream parameter (buffer size, sample rate,\r
+// device disconnect) notification arrived. The listeners entail\r
+// quite a bit of extra code and most likely, a user program wouldn't\r
+// be prepared for the result anyway. However, we do provide a flag\r
+// to the client callback function to inform of an over/underrun.\r
+//\r
+// The mechanism for querying and setting system parameters was\r
+// updated (and perhaps simplified) in OS-X version 10.4. However,\r
+// since 10.4 support is not necessarily available to all users, I've\r
+// decided not to update the respective code at this time. Perhaps\r
+// this will happen when Apple makes 10.4 free for everyone. :-)\r
+\r
+// A structure to hold various information related to the CoreAudio API\r
+// implementation.\r
+struct CoreHandle {\r
+ AudioDeviceID id[2]; // device ids\r
+#if defined( MAC_OS_X_VERSION_10_5 ) && ( MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5 )\r
+ AudioDeviceIOProcID procId[2];\r
+#endif\r
+ UInt32 iStream[2]; // device stream index (or first if using multiple)\r
+ UInt32 nStreams[2]; // number of streams to use\r
+ bool xrun[2];\r
+ char *deviceBuffer;\r
+ pthread_cond_t condition;\r
+ int drainCounter; // Tracks callback counts when draining\r
+ bool internalDrain; // Indicates if stop is initiated from callback or not.\r
+\r
+ CoreHandle()\r
+ :deviceBuffer(0), drainCounter(0), internalDrain(false) { nStreams[0] = 1; nStreams[1] = 1; id[0] = 0; id[1] = 0; xrun[0] = false; xrun[1] = false; }\r
+};\r
+\r
+RtApiCore :: RtApiCore()\r
+{\r
+ // Nothing to do here.\r
+}\r
+\r
+RtApiCore :: ~RtApiCore()\r
+{\r
+ // The subclass destructor gets called before the base class\r
+ // destructor, so close an existing stream before deallocating\r
+ // apiDeviceId memory.\r
+ if ( stream_.state != STREAM_CLOSED ) closeStream();\r
+}\r
+\r
+unsigned int RtApiCore :: getDeviceCount( void )\r
+{\r
+ // Find out how many audio devices there are, if any.\r
+ UInt32 dataSize;\r
+ AudioObjectPropertyAddress propertyAddress = { kAudioHardwarePropertyDevices, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };\r
+ OSStatus result = AudioObjectGetPropertyDataSize( kAudioObjectSystemObject, &propertyAddress, 0, NULL, &dataSize );\r
+ if ( result != noErr ) {\r
+ errorText_ = "RtApiCore::getDeviceCount: OS-X error getting device info!";\r
+ error( RtError::WARNING );\r
+ return 0;\r
+ }\r
+\r
+ return dataSize / sizeof( AudioDeviceID );\r
+}\r
+\r
+unsigned int RtApiCore :: getDefaultInputDevice( void )\r
+{\r
+ unsigned int nDevices = getDeviceCount();\r
+ if ( nDevices <= 1 ) return 0;\r
+\r
+ AudioDeviceID id;\r
+ UInt32 dataSize = sizeof( AudioDeviceID );\r
+ AudioObjectPropertyAddress property = { kAudioHardwarePropertyDefaultInputDevice, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };\r
+ OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, &id );\r
+ if ( result != noErr ) {\r
+ errorText_ = "RtApiCore::getDefaultInputDevice: OS-X system error getting device.";\r
+ error( RtError::WARNING );\r
+ return 0;\r
+ }\r
+\r
+ dataSize *= nDevices;\r
+ AudioDeviceID deviceList[ nDevices ];\r
+ property.mSelector = kAudioHardwarePropertyDevices;\r
+ result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, (void *) &deviceList );\r
+ if ( result != noErr ) {\r
+ errorText_ = "RtApiCore::getDefaultInputDevice: OS-X system error getting device IDs.";\r
+ error( RtError::WARNING );\r
+ return 0;\r
+ }\r
+\r
+ for ( unsigned int i=0; i<nDevices; i++ )\r
+ if ( id == deviceList[i] ) return i;\r
+\r
+ errorText_ = "RtApiCore::getDefaultInputDevice: No default device found!";\r
+ error( RtError::WARNING );\r
+ return 0;\r
+}\r
+\r
+unsigned int RtApiCore :: getDefaultOutputDevice( void )\r
+{\r
+ unsigned int nDevices = getDeviceCount();\r
+ if ( nDevices <= 1 ) return 0;\r
+\r
+ AudioDeviceID id;\r
+ UInt32 dataSize = sizeof( AudioDeviceID );\r
+ AudioObjectPropertyAddress property = { kAudioHardwarePropertyDefaultOutputDevice, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };\r
+ OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, &id );\r
+ if ( result != noErr ) {\r
+ errorText_ = "RtApiCore::getDefaultOutputDevice: OS-X system error getting device.";\r
+ error( RtError::WARNING );\r
+ return 0;\r
+ }\r
+\r
+ dataSize = sizeof( AudioDeviceID ) * nDevices;\r
+ AudioDeviceID deviceList[ nDevices ];\r
+ property.mSelector = kAudioHardwarePropertyDevices;\r
+ result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property, 0, NULL, &dataSize, (void *) &deviceList );\r
+ if ( result != noErr ) {\r
+ errorText_ = "RtApiCore::getDefaultOutputDevice: OS-X system error getting device IDs.";\r
+ error( RtError::WARNING );\r
+ return 0;\r
+ }\r
+\r
+ for ( unsigned int i=0; i<nDevices; i++ )\r
+ if ( id == deviceList[i] ) return i;\r
+\r
+ errorText_ = "RtApiCore::getDefaultOutputDevice: No default device found!";\r
+ error( RtError::WARNING );\r
+ return 0;\r
+}\r
+\r
+RtAudio::DeviceInfo RtApiCore :: getDeviceInfo( unsigned int device )\r
+{\r
+ RtAudio::DeviceInfo info;\r
+ info.probed = false;\r
+\r
+ // Get device ID\r
+ unsigned int nDevices = getDeviceCount();\r
+ if ( nDevices == 0 ) {\r
+ errorText_ = "RtApiCore::getDeviceInfo: no devices found!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ if ( device >= nDevices ) {\r
+ errorText_ = "RtApiCore::getDeviceInfo: device ID is invalid!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ AudioDeviceID deviceList[ nDevices ];\r
+ UInt32 dataSize = sizeof( AudioDeviceID ) * nDevices;\r
+ AudioObjectPropertyAddress property = { kAudioHardwarePropertyDevices,\r
+ kAudioObjectPropertyScopeGlobal,\r
+ kAudioObjectPropertyElementMaster };\r
+ OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property,\r
+ 0, NULL, &dataSize, (void *) &deviceList );\r
+ if ( result != noErr ) {\r
+ errorText_ = "RtApiCore::getDeviceInfo: OS-X system error getting device IDs.";\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ AudioDeviceID id = deviceList[ device ];\r
+\r
+ // Get the device name.\r
+ info.name.erase();\r
+ CFStringRef cfname;\r
+ dataSize = sizeof( CFStringRef );\r
+ property.mSelector = kAudioObjectPropertyManufacturer;\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &cfname );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceInfo: system error (" << getErrorCode( result ) << ") getting device manufacturer.";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ //const char *mname = CFStringGetCStringPtr( cfname, CFStringGetSystemEncoding() );\r
+ int length = CFStringGetLength(cfname);\r
+ char *mname = (char *)malloc(length * 3 + 1);\r
+ CFStringGetCString(cfname, mname, length * 3 + 1, CFStringGetSystemEncoding());\r
+ info.name.append( (const char *)mname, strlen(mname) );\r
+ info.name.append( ": " );\r
+ CFRelease( cfname );\r
+ free(mname);\r
+\r
+ property.mSelector = kAudioObjectPropertyName;\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &cfname );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceInfo: system error (" << getErrorCode( result ) << ") getting device name.";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ //const char *name = CFStringGetCStringPtr( cfname, CFStringGetSystemEncoding() );\r
+ length = CFStringGetLength(cfname);\r
+ char *name = (char *)malloc(length * 3 + 1);\r
+ CFStringGetCString(cfname, name, length * 3 + 1, CFStringGetSystemEncoding());\r
+ info.name.append( (const char *)name, strlen(name) );\r
+ CFRelease( cfname );\r
+ free(name);\r
+\r
+ // Get the output stream "configuration".\r
+ AudioBufferList *bufferList = nil;\r
+ property.mSelector = kAudioDevicePropertyStreamConfiguration;\r
+ property.mScope = kAudioDevicePropertyScopeOutput;\r
+ // property.mElement = kAudioObjectPropertyElementWildcard;\r
+ dataSize = 0;\r
+ result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );\r
+ if ( result != noErr || dataSize == 0 ) {\r
+ errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting output stream configuration info for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Allocate the AudioBufferList.\r
+ bufferList = (AudioBufferList *) malloc( dataSize );\r
+ if ( bufferList == NULL ) {\r
+ errorText_ = "RtApiCore::getDeviceInfo: memory error allocating output AudioBufferList.";\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, bufferList );\r
+ if ( result != noErr || dataSize == 0 ) {\r
+ free( bufferList );\r
+ errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting output stream configuration for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Get output channel information.\r
+ unsigned int i, nStreams = bufferList->mNumberBuffers;\r
+ for ( i=0; i<nStreams; i++ )\r
+ info.outputChannels += bufferList->mBuffers[i].mNumberChannels;\r
+ free( bufferList );\r
+\r
+ // Get the input stream "configuration".\r
+ property.mScope = kAudioDevicePropertyScopeInput;\r
+ result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );\r
+ if ( result != noErr || dataSize == 0 ) {\r
+ errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting input stream configuration info for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Allocate the AudioBufferList.\r
+ bufferList = (AudioBufferList *) malloc( dataSize );\r
+ if ( bufferList == NULL ) {\r
+ errorText_ = "RtApiCore::getDeviceInfo: memory error allocating input AudioBufferList.";\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, bufferList );\r
+ if (result != noErr || dataSize == 0) {\r
+ free( bufferList );\r
+ errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting input stream configuration for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Get input channel information.\r
+ nStreams = bufferList->mNumberBuffers;\r
+ for ( i=0; i<nStreams; i++ )\r
+ info.inputChannels += bufferList->mBuffers[i].mNumberChannels;\r
+ free( bufferList );\r
+\r
+ // If device opens for both playback and capture, we determine the channels.\r
+ if ( info.outputChannels > 0 && info.inputChannels > 0 )\r
+ info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;\r
+\r
+ // Probe the device sample rates.\r
+ bool isInput = false;\r
+ if ( info.outputChannels == 0 ) isInput = true;\r
+\r
+ // Determine the supported sample rates.\r
+ property.mSelector = kAudioDevicePropertyAvailableNominalSampleRates;\r
+ if ( isInput == false ) property.mScope = kAudioDevicePropertyScopeOutput;\r
+ result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );\r
+ if ( result != kAudioHardwareNoError || dataSize == 0 ) {\r
+ errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting sample rate info.";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ UInt32 nRanges = dataSize / sizeof( AudioValueRange );\r
+ AudioValueRange rangeList[ nRanges ];\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &rangeList );\r
+ if ( result != kAudioHardwareNoError ) {\r
+ errorStream_ << "RtApiCore::getDeviceInfo: system error (" << getErrorCode( result ) << ") getting sample rates.";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ Float64 minimumRate = 100000000.0, maximumRate = 0.0;\r
+ for ( UInt32 i=0; i<nRanges; i++ ) {\r
+ if ( rangeList[i].mMinimum < minimumRate ) minimumRate = rangeList[i].mMinimum;\r
+ if ( rangeList[i].mMaximum > maximumRate ) maximumRate = rangeList[i].mMaximum;\r
+ }\r
+\r
+ info.sampleRates.clear();\r
+ for ( unsigned int k=0; k<MAX_SAMPLE_RATES; k++ ) {\r
+ if ( SAMPLE_RATES[k] >= (unsigned int) minimumRate && SAMPLE_RATES[k] <= (unsigned int) maximumRate )\r
+ info.sampleRates.push_back( SAMPLE_RATES[k] );\r
+ }\r
+\r
+ if ( info.sampleRates.size() == 0 ) {\r
+ errorStream_ << "RtApiCore::probeDeviceInfo: No supported sample rates found for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // CoreAudio always uses 32-bit floating point data for PCM streams.\r
+ // Thus, any other "physical" formats supported by the device are of\r
+ // no interest to the client.\r
+ info.nativeFormats = RTAUDIO_FLOAT32;\r
+\r
+ if ( info.outputChannels > 0 )\r
+ if ( getDefaultOutputDevice() == device ) info.isDefaultOutput = true;\r
+ if ( info.inputChannels > 0 )\r
+ if ( getDefaultInputDevice() == device ) info.isDefaultInput = true;\r
+\r
+ info.probed = true;\r
+ return info;\r
+}\r
+\r
+OSStatus callbackHandler( AudioDeviceID inDevice,\r
+ const AudioTimeStamp* inNow,\r
+ const AudioBufferList* inInputData,\r
+ const AudioTimeStamp* inInputTime,\r
+ AudioBufferList* outOutputData,\r
+ const AudioTimeStamp* inOutputTime, \r
+ void* infoPointer )\r
+{\r
+ CallbackInfo *info = (CallbackInfo *) infoPointer;\r
+\r
+ RtApiCore *object = (RtApiCore *) info->object;\r
+ if ( object->callbackEvent( inDevice, inInputData, outOutputData ) == false )\r
+ return kAudioHardwareUnspecifiedError;\r
+ else\r
+ return kAudioHardwareNoError;\r
+}\r
+\r
+OSStatus deviceListener( AudioObjectID inDevice,\r
+ UInt32 nAddresses,\r
+ const AudioObjectPropertyAddress properties[],\r
+ void* handlePointer )\r
+{\r
+ CoreHandle *handle = (CoreHandle *) handlePointer;\r
+ for ( UInt32 i=0; i<nAddresses; i++ ) {\r
+ if ( properties[i].mSelector == kAudioDeviceProcessorOverload ) {\r
+ if ( properties[i].mScope == kAudioDevicePropertyScopeInput )\r
+ handle->xrun[1] = true;\r
+ else\r
+ handle->xrun[0] = true;\r
+ }\r
+ }\r
+\r
+ return kAudioHardwareNoError;\r
+}\r
+\r
+bool RtApiCore :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,\r
+ unsigned int firstChannel, unsigned int sampleRate,\r
+ RtAudioFormat format, unsigned int *bufferSize,\r
+ RtAudio::StreamOptions *options )\r
+{\r
+ // Get device ID\r
+ unsigned int nDevices = getDeviceCount();\r
+ if ( nDevices == 0 ) {\r
+ // This should not happen because a check is made before this function is called.\r
+ errorText_ = "RtApiCore::probeDeviceOpen: no devices found!";\r
+ return FAILURE;\r
+ }\r
+\r
+ if ( device >= nDevices ) {\r
+ // This should not happen because a check is made before this function is called.\r
+ errorText_ = "RtApiCore::probeDeviceOpen: device ID is invalid!";\r
+ return FAILURE;\r
+ }\r
+\r
+ AudioDeviceID deviceList[ nDevices ];\r
+ UInt32 dataSize = sizeof( AudioDeviceID ) * nDevices;\r
+ AudioObjectPropertyAddress property = { kAudioHardwarePropertyDevices,\r
+ kAudioObjectPropertyScopeGlobal,\r
+ kAudioObjectPropertyElementMaster };\r
+ OSStatus result = AudioObjectGetPropertyData( kAudioObjectSystemObject, &property,\r
+ 0, NULL, &dataSize, (void *) &deviceList );\r
+ if ( result != noErr ) {\r
+ errorText_ = "RtApiCore::probeDeviceOpen: OS-X system error getting device IDs.";\r
+ return FAILURE;\r
+ }\r
+\r
+ AudioDeviceID id = deviceList[ device ];\r
+\r
+ // Setup for stream mode.\r
+ bool isInput = false;\r
+ if ( mode == INPUT ) {\r
+ isInput = true;\r
+ property.mScope = kAudioDevicePropertyScopeInput;\r
+ }\r
+ else\r
+ property.mScope = kAudioDevicePropertyScopeOutput;\r
+\r
+ // Get the stream "configuration".\r
+ AudioBufferList *bufferList = nil;\r
+ dataSize = 0;\r
+ property.mSelector = kAudioDevicePropertyStreamConfiguration;\r
+ result = AudioObjectGetPropertyDataSize( id, &property, 0, NULL, &dataSize );\r
+ if ( result != noErr || dataSize == 0 ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream configuration info for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Allocate the AudioBufferList.\r
+ bufferList = (AudioBufferList *) malloc( dataSize );\r
+ if ( bufferList == NULL ) {\r
+ errorText_ = "RtApiCore::probeDeviceOpen: memory error allocating AudioBufferList.";\r
+ return FAILURE;\r
+ }\r
+\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, bufferList );\r
+ if (result != noErr || dataSize == 0) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream configuration for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Search for one or more streams that contain the desired number of\r
+ // channels. CoreAudio devices can have an arbitrary number of\r
+ // streams and each stream can have an arbitrary number of channels.\r
+ // For each stream, a single buffer of interleaved samples is\r
+ // provided. RtAudio prefers the use of one stream of interleaved\r
+ // data or multiple consecutive single-channel streams. However, we\r
+ // now support multiple consecutive multi-channel streams of\r
+ // interleaved data as well.\r
+ UInt32 iStream, offsetCounter = firstChannel;\r
+ UInt32 nStreams = bufferList->mNumberBuffers;\r
+ bool monoMode = false;\r
+ bool foundStream = false;\r
+\r
+ // First check that the device supports the requested number of\r
+ // channels.\r
+ UInt32 deviceChannels = 0;\r
+ for ( iStream=0; iStream<nStreams; iStream++ )\r
+ deviceChannels += bufferList->mBuffers[iStream].mNumberChannels;\r
+\r
+ if ( deviceChannels < ( channels + firstChannel ) ) {\r
+ free( bufferList );\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: the device (" << device << ") does not support the requested channel count.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Look for a single stream meeting our needs.\r
+ UInt32 firstStream, streamCount = 1, streamChannels = 0, channelOffset = 0;\r
+ for ( iStream=0; iStream<nStreams; iStream++ ) {\r
+ streamChannels = bufferList->mBuffers[iStream].mNumberChannels;\r
+ if ( streamChannels >= channels + offsetCounter ) {\r
+ firstStream = iStream;\r
+ channelOffset = offsetCounter;\r
+ foundStream = true;\r
+ break;\r
+ }\r
+ if ( streamChannels > offsetCounter ) break;\r
+ offsetCounter -= streamChannels;\r
+ }\r
+\r
+ // If we didn't find a single stream above, then we should be able\r
+ // to meet the channel specification with multiple streams.\r
+ if ( foundStream == false ) {\r
+ monoMode = true;\r
+ offsetCounter = firstChannel;\r
+ for ( iStream=0; iStream<nStreams; iStream++ ) {\r
+ streamChannels = bufferList->mBuffers[iStream].mNumberChannels;\r
+ if ( streamChannels > offsetCounter ) break;\r
+ offsetCounter -= streamChannels;\r
+ }\r
+\r
+ firstStream = iStream;\r
+ channelOffset = offsetCounter;\r
+ Int32 channelCounter = channels + offsetCounter - streamChannels;\r
+\r
+ if ( streamChannels > 1 ) monoMode = false;\r
+ while ( channelCounter > 0 ) {\r
+ streamChannels = bufferList->mBuffers[++iStream].mNumberChannels;\r
+ if ( streamChannels > 1 ) monoMode = false;\r
+ channelCounter -= streamChannels;\r
+ streamCount++;\r
+ }\r
+ }\r
+\r
+ free( bufferList );\r
+\r
+ // Determine the buffer size.\r
+ AudioValueRange bufferRange;\r
+ dataSize = sizeof( AudioValueRange );\r
+ property.mSelector = kAudioDevicePropertyBufferFrameSizeRange;\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &bufferRange );\r
+\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting buffer size range for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ if ( bufferRange.mMinimum > *bufferSize ) *bufferSize = (unsigned long) bufferRange.mMinimum;\r
+ else if ( bufferRange.mMaximum < *bufferSize ) *bufferSize = (unsigned long) bufferRange.mMaximum;\r
+ if ( options && options->flags & RTAUDIO_MINIMIZE_LATENCY ) *bufferSize = (unsigned long) bufferRange.mMinimum;\r
+\r
+ // Set the buffer size. For multiple streams, I'm assuming we only\r
+ // need to make this setting for the master channel.\r
+ UInt32 theSize = (UInt32) *bufferSize;\r
+ dataSize = sizeof( UInt32 );\r
+ property.mSelector = kAudioDevicePropertyBufferFrameSize;\r
+ result = AudioObjectSetPropertyData( id, &property, 0, NULL, dataSize, &theSize );\r
+\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") setting the buffer size for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // If attempting to setup a duplex stream, the bufferSize parameter\r
+ // MUST be the same in both directions!\r
+ *bufferSize = theSize;\r
+ if ( stream_.mode == OUTPUT && mode == INPUT && *bufferSize != stream_.bufferSize ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error setting buffer size for duplex stream on device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ stream_.bufferSize = *bufferSize;\r
+ stream_.nBuffers = 1;\r
+\r
+ // Check and if necessary, change the sample rate for the device.\r
+ Float64 nominalRate;\r
+ dataSize = sizeof( Float64 );\r
+ property.mSelector = kAudioDevicePropertyNominalSampleRate;\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &nominalRate );\r
+\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting current sample rate.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Only change the sample rate if off by more than 1 Hz.\r
+ if ( fabs( nominalRate - (double)sampleRate ) > 1.0 ) {\r
+ nominalRate = (Float64) sampleRate;\r
+ result = AudioObjectSetPropertyData( id, &property, 0, NULL, dataSize, &nominalRate );\r
+\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") setting sample rate for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+\r
+ // Try to set "hog" mode ... it's not clear to me this is working.\r
+ if ( options && options->flags & RTAUDIO_HOG_DEVICE ) {\r
+ pid_t hog_pid;\r
+ dataSize = sizeof( hog_pid );\r
+ property.mSelector = kAudioDevicePropertyHogMode;\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &hog_pid );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting 'hog' state!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ if ( hog_pid != getpid() ) {\r
+ hog_pid = getpid();\r
+ result = AudioObjectSetPropertyData( id, &property, 0, NULL, dataSize, &hog_pid );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") setting 'hog' state!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+ }\r
+\r
+ // Get the stream ID(s) so we can set the stream format.\r
+ AudioStreamID streamIDs[ nStreams ];\r
+ dataSize = nStreams * sizeof( AudioStreamID );\r
+ property.mSelector = kAudioDevicePropertyStreams;\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &streamIDs );\r
+\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream ID(s) for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Now set the stream format for each stream. Also, check the\r
+ // physical format of the device and change that if necessary.\r
+ AudioStreamBasicDescription description;\r
+ dataSize = sizeof( AudioStreamBasicDescription );\r
+\r
+ bool updateFormat;\r
+ for ( UInt32 i=0; i<streamCount; i++ ) {\r
+\r
+ property.mSelector = kAudioStreamPropertyVirtualFormat;\r
+ result = AudioObjectGetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, &dataSize, &description );\r
+\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream format for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Set the sample rate and data format id. However, only make the\r
+ // change if the sample rate is not within 1.0 of the desired\r
+ // rate and the format is not linear pcm.\r
+ updateFormat = false;\r
+ if ( fabs( description.mSampleRate - (double)sampleRate ) > 1.0 ) {\r
+ description.mSampleRate = (double) sampleRate;\r
+ updateFormat = true;\r
+ }\r
+\r
+ if ( description.mFormatID != kAudioFormatLinearPCM ) {\r
+ description.mFormatID = kAudioFormatLinearPCM;\r
+ updateFormat = true;\r
+ }\r
+\r
+ if ( updateFormat ) {\r
+ result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &description );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") setting sample rate or data format for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+\r
+ // Now check the physical format.\r
+ property.mSelector = kAudioStreamPropertyPhysicalFormat;\r
+ result = AudioObjectGetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, &dataSize, &description );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream physical format for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ if ( description.mFormatID != kAudioFormatLinearPCM || description.mBitsPerChannel < 24 ) {\r
+ description.mFormatID = kAudioFormatLinearPCM;\r
+ AudioStreamBasicDescription testDescription = description;\r
+ unsigned long formatFlags;\r
+\r
+ // We'll try higher bit rates first and then work our way down.\r
+ testDescription.mBitsPerChannel = 32;\r
+ testDescription.mBytesPerFrame = testDescription.mBitsPerChannel/8 * testDescription.mChannelsPerFrame;\r
+ testDescription.mBytesPerPacket = testDescription.mBytesPerFrame * testDescription.mFramesPerPacket;\r
+ formatFlags = description.mFormatFlags | kLinearPCMFormatFlagIsFloat & ~kLinearPCMFormatFlagIsSignedInteger;\r
+ testDescription.mFormatFlags = formatFlags;\r
+ result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &testDescription );\r
+ if ( result == noErr ) continue;\r
+\r
+ testDescription = description;\r
+ testDescription.mBitsPerChannel = 32;\r
+ testDescription.mBytesPerFrame = testDescription.mBitsPerChannel/8 * testDescription.mChannelsPerFrame;\r
+ testDescription.mBytesPerPacket = testDescription.mBytesPerFrame * testDescription.mFramesPerPacket;\r
+ formatFlags = (description.mFormatFlags | kLinearPCMFormatFlagIsSignedInteger) & ~kLinearPCMFormatFlagIsFloat;\r
+ testDescription.mFormatFlags = formatFlags;\r
+ result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &testDescription );\r
+ if ( result == noErr ) continue;\r
+\r
+ testDescription = description;\r
+ testDescription.mBitsPerChannel = 24;\r
+ testDescription.mBytesPerFrame = testDescription.mBitsPerChannel/8 * testDescription.mChannelsPerFrame;\r
+ testDescription.mBytesPerPacket = testDescription.mBytesPerFrame * testDescription.mFramesPerPacket;\r
+ testDescription.mFormatFlags = formatFlags;\r
+ result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &testDescription );\r
+ if ( result == noErr ) continue;\r
+\r
+ testDescription = description;\r
+ testDescription.mBitsPerChannel = 16;\r
+ testDescription.mBytesPerFrame = testDescription.mBitsPerChannel/8 * testDescription.mChannelsPerFrame;\r
+ testDescription.mBytesPerPacket = testDescription.mBytesPerFrame * testDescription.mFramesPerPacket;\r
+ testDescription.mFormatFlags = formatFlags;\r
+ result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &testDescription );\r
+ if ( result == noErr ) continue;\r
+\r
+ testDescription = description;\r
+ testDescription.mBitsPerChannel = 8;\r
+ testDescription.mBytesPerFrame = testDescription.mBitsPerChannel/8 * testDescription.mChannelsPerFrame;\r
+ testDescription.mBytesPerPacket = testDescription.mBytesPerFrame * testDescription.mFramesPerPacket;\r
+ testDescription.mFormatFlags = formatFlags;\r
+ result = AudioObjectSetPropertyData( streamIDs[firstStream+i], &property, 0, NULL, dataSize, &testDescription );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") setting physical data format for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+ }\r
+\r
+\r
+ // Get the stream latency. There can be latency in both the device\r
+ // and the stream. First, attempt to get the device latency on the\r
+ // master channel or the first open channel. Errors that might\r
+ // occur here are not deemed critical.\r
+\r
+ UInt32 latency;\r
+ dataSize = sizeof( UInt32 );\r
+ property.mSelector = kAudioDevicePropertyLatency;\r
+ if ( AudioObjectHasProperty( id, &property ) == true ) {\r
+ result = AudioObjectGetPropertyData( id, &property, 0, NULL, &dataSize, &latency );\r
+ if ( result == kAudioHardwareNoError ) stream_.latency[ mode ] = latency;\r
+ else {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting device latency for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ }\r
+ }\r
+\r
+ // Now try to get the stream latency. For multiple streams, I assume the\r
+ // latency is equal for each.\r
+ result = AudioObjectGetPropertyData( streamIDs[firstStream], &property, 0, NULL, &dataSize, &latency );\r
+ if ( result == kAudioHardwareNoError ) stream_.latency[ mode ] += latency;\r
+ else {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error (" << getErrorCode( result ) << ") getting stream latency for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ }\r
+\r
+ // Byte-swapping: According to AudioHardware.h, the stream data will\r
+ // always be presented in native-endian format, so we should never\r
+ // need to byte swap.\r
+ stream_.doByteSwap[mode] = false;\r
+\r
+ // From the CoreAudio documentation, PCM data must be supplied as\r
+ // 32-bit floats.\r
+ stream_.userFormat = format;\r
+ stream_.deviceFormat[mode] = RTAUDIO_FLOAT32;\r
+\r
+ if ( streamCount == 1 )\r
+ stream_.nDeviceChannels[mode] = description.mChannelsPerFrame;\r
+ else // multiple streams\r
+ stream_.nDeviceChannels[mode] = channels;\r
+ stream_.nUserChannels[mode] = channels;\r
+ stream_.channelOffset[mode] = channelOffset; // offset within a CoreAudio stream\r
+ if ( options && options->flags & RTAUDIO_NONINTERLEAVED ) stream_.userInterleaved = false;\r
+ else stream_.userInterleaved = true;\r
+ stream_.deviceInterleaved[mode] = true;\r
+ if ( monoMode == true ) stream_.deviceInterleaved[mode] = false;\r
+\r
+ // Set flags for buffer conversion.\r
+ stream_.doConvertBuffer[mode] = false;\r
+ if ( stream_.userFormat != stream_.deviceFormat[mode] )\r
+ stream_.doConvertBuffer[mode] = true;\r
+ if ( stream_.nUserChannels[mode] < stream_.nDeviceChannels[mode] )\r
+ stream_.doConvertBuffer[mode] = true;\r
+ if ( streamCount == 1 ) {\r
+ if ( stream_.nUserChannels[mode] > 1 &&\r
+ stream_.userInterleaved != stream_.deviceInterleaved[mode] )\r
+ stream_.doConvertBuffer[mode] = true;\r
+ }\r
+ else if ( monoMode && stream_.userInterleaved )\r
+ stream_.doConvertBuffer[mode] = true;\r
+\r
+ // Allocate our CoreHandle structure for the stream.\r
+ CoreHandle *handle = 0;\r
+ if ( stream_.apiHandle == 0 ) {\r
+ try {\r
+ handle = new CoreHandle;\r
+ }\r
+ catch ( std::bad_alloc& ) {\r
+ errorText_ = "RtApiCore::probeDeviceOpen: error allocating CoreHandle memory.";\r
+ goto error;\r
+ }\r
+\r
+ if ( pthread_cond_init( &handle->condition, NULL ) ) {\r
+ errorText_ = "RtApiCore::probeDeviceOpen: error initializing pthread condition variable.";\r
+ goto error;\r
+ }\r
+ stream_.apiHandle = (void *) handle;\r
+ }\r
+ else\r
+ handle = (CoreHandle *) stream_.apiHandle;\r
+ handle->iStream[mode] = firstStream;\r
+ handle->nStreams[mode] = streamCount;\r
+ handle->id[mode] = id;\r
+\r
+ // Allocate necessary internal buffers.\r
+ unsigned long bufferBytes;\r
+ bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );\r
+ // stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );\r
+ stream_.userBuffer[mode] = (char *) malloc( bufferBytes );\r
+ if ( stream_.userBuffer[mode] == NULL ) {\r
+ errorText_ = "RtApiCore::probeDeviceOpen: error allocating user buffer memory.";\r
+ goto error;\r
+ }\r
+\r
+ // If possible, we will make use of the CoreAudio stream buffers as\r
+ // "device buffers". However, we can't do this if using multiple\r
+ // streams.\r
+ if ( stream_.doConvertBuffer[mode] && handle->nStreams[mode] > 1 ) {\r
+\r
+ bool makeBuffer = true;\r
+ bufferBytes = stream_.nDeviceChannels[mode] * formatBytes( stream_.deviceFormat[mode] );\r
+ if ( mode == INPUT ) {\r
+ if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {\r
+ unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );\r
+ if ( bufferBytes <= bytesOut ) makeBuffer = false;\r
+ }\r
+ }\r
+\r
+ if ( makeBuffer ) {\r
+ bufferBytes *= *bufferSize;\r
+ if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.deviceBuffer == NULL ) {\r
+ errorText_ = "RtApiCore::probeDeviceOpen: error allocating device buffer memory.";\r
+ goto error;\r
+ }\r
+ }\r
+ }\r
+\r
+ stream_.sampleRate = sampleRate;\r
+ stream_.device[mode] = device;\r
+ stream_.state = STREAM_STOPPED;\r
+ stream_.callbackInfo.object = (void *) this;\r
+\r
+ // Setup the buffer conversion information structure.\r
+ if ( stream_.doConvertBuffer[mode] ) {\r
+ if ( streamCount > 1 ) setConvertInfo( mode, 0 );\r
+ else setConvertInfo( mode, channelOffset );\r
+ }\r
+\r
+ if ( mode == INPUT && stream_.mode == OUTPUT && stream_.device[0] == device )\r
+ // Only one callback procedure per device.\r
+ stream_.mode = DUPLEX;\r
+ else {\r
+#if defined( MAC_OS_X_VERSION_10_5 ) && ( MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5 )\r
+ result = AudioDeviceCreateIOProcID( id, callbackHandler, (void *) &stream_.callbackInfo, &handle->procId[mode] );\r
+#else\r
+ // deprecated in favor of AudioDeviceCreateIOProcID()\r
+ result = AudioDeviceAddIOProc( id, callbackHandler, (void *) &stream_.callbackInfo );\r
+#endif\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::probeDeviceOpen: system error setting callback for device (" << device << ").";\r
+ errorText_ = errorStream_.str();\r
+ goto error;\r
+ }\r
+ if ( stream_.mode == OUTPUT && mode == INPUT )\r
+ stream_.mode = DUPLEX;\r
+ else\r
+ stream_.mode = mode;\r
+ }\r
+\r
+ // Setup the device property listener for over/underload.\r
+ property.mSelector = kAudioDeviceProcessorOverload;\r
+ result = AudioObjectAddPropertyListener( id, &property, deviceListener, (void *) handle );\r
+\r
+ return SUCCESS;\r
+\r
+ error:\r
+ if ( handle ) {\r
+ pthread_cond_destroy( &handle->condition );\r
+ delete handle;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ return FAILURE;\r
+}\r
+\r
+void RtApiCore :: closeStream( void )\r
+{\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiCore::closeStream(): no open stream to close!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ CoreHandle *handle = (CoreHandle *) stream_.apiHandle;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+ if ( stream_.state == STREAM_RUNNING )\r
+ AudioDeviceStop( handle->id[0], callbackHandler );\r
+#if defined( MAC_OS_X_VERSION_10_5 ) && ( MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5 )\r
+ AudioDeviceDestroyIOProcID( handle->id[0], handle->procId[0] );\r
+#else\r
+ // deprecated in favor of AudioDeviceDestroyIOProcID()\r
+ AudioDeviceRemoveIOProc( handle->id[0], callbackHandler );\r
+#endif\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || ( stream_.mode == DUPLEX && stream_.device[0] != stream_.device[1] ) ) {\r
+ if ( stream_.state == STREAM_RUNNING )\r
+ AudioDeviceStop( handle->id[1], callbackHandler );\r
+#if defined( MAC_OS_X_VERSION_10_5 ) && ( MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5 )\r
+ AudioDeviceDestroyIOProcID( handle->id[1], handle->procId[1] );\r
+#else\r
+ // deprecated in favor of AudioDeviceDestroyIOProcID()\r
+ AudioDeviceRemoveIOProc( handle->id[1], callbackHandler );\r
+#endif\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ // Destroy pthread condition variable.\r
+ pthread_cond_destroy( &handle->condition );\r
+ delete handle;\r
+ stream_.apiHandle = 0;\r
+\r
+ stream_.mode = UNINITIALIZED;\r
+ stream_.state = STREAM_CLOSED;\r
+}\r
+\r
+void RtApiCore :: startStream( void )\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_RUNNING ) {\r
+ errorText_ = "RtApiCore::startStream(): the stream is already running!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ OSStatus result = noErr;\r
+ CoreHandle *handle = (CoreHandle *) stream_.apiHandle;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+\r
+ result = AudioDeviceStart( handle->id[0], callbackHandler );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::startStream: system error (" << getErrorCode( result ) << ") starting callback procedure on device (" << stream_.device[0] << ").";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ if ( stream_.mode == INPUT ||\r
+ ( stream_.mode == DUPLEX && stream_.device[0] != stream_.device[1] ) ) {\r
+\r
+ result = AudioDeviceStart( handle->id[1], callbackHandler );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::startStream: system error starting input callback procedure on device (" << stream_.device[1] << ").";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ handle->drainCounter = 0;\r
+ handle->internalDrain = false;\r
+ stream_.state = STREAM_RUNNING;\r
+\r
+ unlock:\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ if ( result == noErr ) return;\r
+ error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiCore :: stopStream( void )\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiCore::stopStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return;\r
+ }\r
+\r
+ OSStatus result = noErr;\r
+ CoreHandle *handle = (CoreHandle *) stream_.apiHandle;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+\r
+ if ( handle->drainCounter == 0 ) {\r
+ handle->drainCounter = 2;\r
+ pthread_cond_wait( &handle->condition, &stream_.mutex ); // block until signaled\r
+ }\r
+\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ result = AudioDeviceStop( handle->id[0], callbackHandler );\r
+ MUTEX_LOCK( &stream_.mutex );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::stopStream: system error (" << getErrorCode( result ) << ") stopping callback procedure on device (" << stream_.device[0] << ").";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || ( stream_.mode == DUPLEX && stream_.device[0] != stream_.device[1] ) ) {\r
+\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ result = AudioDeviceStop( handle->id[1], callbackHandler );\r
+ MUTEX_LOCK( &stream_.mutex );\r
+ if ( result != noErr ) {\r
+ errorStream_ << "RtApiCore::stopStream: system error (" << getErrorCode( result ) << ") stopping input callback procedure on device (" << stream_.device[1] << ").";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ stream_.state = STREAM_STOPPED;\r
+\r
+ unlock:\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ if ( result == noErr ) return;\r
+ error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiCore :: abortStream( void )\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiCore::abortStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ CoreHandle *handle = (CoreHandle *) stream_.apiHandle;\r
+ handle->drainCounter = 2;\r
+\r
+ stopStream();\r
+}\r
+\r
+bool RtApiCore :: callbackEvent( AudioDeviceID deviceId,\r
+ const AudioBufferList *inBufferList,\r
+ const AudioBufferList *outBufferList )\r
+{\r
+ if ( stream_.state == STREAM_STOPPED ) return SUCCESS;\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiCore::callbackEvent(): the stream is closed ... this shouldn't happen!";\r
+ error( RtError::WARNING );\r
+ return FAILURE;\r
+ }\r
+\r
+ CallbackInfo *info = (CallbackInfo *) &stream_.callbackInfo;\r
+ CoreHandle *handle = (CoreHandle *) stream_.apiHandle;\r
+\r
+ // Check if we were draining the stream and signal is finished.\r
+ if ( handle->drainCounter > 3 ) {\r
+ if ( handle->internalDrain == true )\r
+ stopStream();\r
+ else // external call to stopStream()\r
+ pthread_cond_signal( &handle->condition );\r
+ return SUCCESS;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ // The state might change while waiting on a mutex.\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return SUCCESS;\r
+ }\r
+\r
+ AudioDeviceID outputDevice = handle->id[0];\r
+\r
+ // Invoke user callback to get fresh output data UNLESS we are\r
+ // draining stream or duplex mode AND the input/output devices are\r
+ // different AND this function is called for the input device.\r
+ if ( handle->drainCounter == 0 && ( stream_.mode != DUPLEX || deviceId == outputDevice ) ) {\r
+ RtAudioCallback callback = (RtAudioCallback) info->callback;\r
+ double streamTime = getStreamTime();\r
+ RtAudioStreamStatus status = 0;\r
+ if ( stream_.mode != INPUT && handle->xrun[0] == true ) {\r
+ status |= RTAUDIO_OUTPUT_UNDERFLOW;\r
+ handle->xrun[0] = false;\r
+ }\r
+ if ( stream_.mode != OUTPUT && handle->xrun[1] == true ) {\r
+ status |= RTAUDIO_INPUT_OVERFLOW;\r
+ handle->xrun[1] = false;\r
+ }\r
+\r
+ handle->drainCounter = callback( stream_.userBuffer[0], stream_.userBuffer[1],\r
+ stream_.bufferSize, streamTime, status, info->userData );\r
+ if ( handle->drainCounter == 2 ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ abortStream();\r
+ return SUCCESS;\r
+ }\r
+ else if ( handle->drainCounter == 1 )\r
+ handle->internalDrain = true;\r
+ }\r
+\r
+ if ( stream_.mode == OUTPUT || ( stream_.mode == DUPLEX && deviceId == outputDevice ) ) {\r
+\r
+ if ( handle->drainCounter > 1 ) { // write zeros to the output stream\r
+\r
+ if ( handle->nStreams[0] == 1 ) {\r
+ memset( outBufferList->mBuffers[handle->iStream[0]].mData,\r
+ 0,\r
+ outBufferList->mBuffers[handle->iStream[0]].mDataByteSize );\r
+ }\r
+ else { // fill multiple streams with zeros\r
+ for ( unsigned int i=0; i<handle->nStreams[0]; i++ ) {\r
+ memset( outBufferList->mBuffers[handle->iStream[0]+i].mData,\r
+ 0,\r
+ outBufferList->mBuffers[handle->iStream[0]+i].mDataByteSize );\r
+ }\r
+ }\r
+ }\r
+ else if ( handle->nStreams[0] == 1 ) {\r
+ if ( stream_.doConvertBuffer[0] ) { // convert directly to CoreAudio stream buffer\r
+ convertBuffer( (char *) outBufferList->mBuffers[handle->iStream[0]].mData,\r
+ stream_.userBuffer[0], stream_.convertInfo[0] );\r
+ }\r
+ else { // copy from user buffer\r
+ memcpy( outBufferList->mBuffers[handle->iStream[0]].mData,\r
+ stream_.userBuffer[0],\r
+ outBufferList->mBuffers[handle->iStream[0]].mDataByteSize );\r
+ }\r
+ }\r
+ else { // fill multiple streams\r
+ Float32 *inBuffer = (Float32 *) stream_.userBuffer[0];\r
+ if ( stream_.doConvertBuffer[0] ) {\r
+ convertBuffer( stream_.deviceBuffer, stream_.userBuffer[0], stream_.convertInfo[0] );\r
+ inBuffer = (Float32 *) stream_.deviceBuffer;\r
+ }\r
+\r
+ if ( stream_.deviceInterleaved[0] == false ) { // mono mode\r
+ UInt32 bufferBytes = outBufferList->mBuffers[handle->iStream[0]].mDataByteSize;\r
+ for ( unsigned int i=0; i<stream_.nUserChannels[0]; i++ ) {\r
+ memcpy( outBufferList->mBuffers[handle->iStream[0]+i].mData,\r
+ (void *)&inBuffer[i*stream_.bufferSize], bufferBytes );\r
+ }\r
+ }\r
+ else { // fill multiple multi-channel streams with interleaved data\r
+ UInt32 streamChannels, channelsLeft, inJump, outJump, inOffset;\r
+ Float32 *out, *in;\r
+\r
+ bool inInterleaved = ( stream_.userInterleaved ) ? true : false;\r
+ UInt32 inChannels = stream_.nUserChannels[0];\r
+ if ( stream_.doConvertBuffer[0] ) {\r
+ inInterleaved = true; // device buffer will always be interleaved for nStreams > 1 and not mono mode\r
+ inChannels = stream_.nDeviceChannels[0];\r
+ }\r
+\r
+ if ( inInterleaved ) inOffset = 1;\r
+ else inOffset = stream_.bufferSize;\r
+\r
+ channelsLeft = inChannels;\r
+ for ( unsigned int i=0; i<handle->nStreams[0]; i++ ) {\r
+ in = inBuffer;\r
+ out = (Float32 *) outBufferList->mBuffers[handle->iStream[0]+i].mData;\r
+ streamChannels = outBufferList->mBuffers[handle->iStream[0]+i].mNumberChannels;\r
+\r
+ outJump = 0;\r
+ // Account for possible channel offset in first stream\r
+ if ( i == 0 && stream_.channelOffset[0] > 0 ) {\r
+ streamChannels -= stream_.channelOffset[0];\r
+ outJump = stream_.channelOffset[0];\r
+ out += outJump;\r
+ }\r
+\r
+ // Account for possible unfilled channels at end of the last stream\r
+ if ( streamChannels > channelsLeft ) {\r
+ outJump = streamChannels - channelsLeft;\r
+ streamChannels = channelsLeft;\r
+ }\r
+\r
+ // Determine input buffer offsets and skips\r
+ if ( inInterleaved ) {\r
+ inJump = inChannels;\r
+ in += inChannels - channelsLeft;\r
+ }\r
+ else {\r
+ inJump = 1;\r
+ in += (inChannels - channelsLeft) * inOffset;\r
+ }\r
+\r
+ for ( unsigned int i=0; i<stream_.bufferSize; i++ ) {\r
+ for ( unsigned int j=0; j<streamChannels; j++ ) {\r
+ *out++ = in[j*inOffset];\r
+ }\r
+ out += outJump;\r
+ in += inJump;\r
+ }\r
+ channelsLeft -= streamChannels;\r
+ }\r
+ }\r
+ }\r
+\r
+ if ( handle->drainCounter ) {\r
+ handle->drainCounter++;\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ AudioDeviceID inputDevice;\r
+ inputDevice = handle->id[1];\r
+ if ( stream_.mode == INPUT || ( stream_.mode == DUPLEX && deviceId == inputDevice ) ) {\r
+\r
+ if ( handle->nStreams[1] == 1 ) {\r
+ if ( stream_.doConvertBuffer[1] ) { // convert directly from CoreAudio stream buffer\r
+ convertBuffer( stream_.userBuffer[1],\r
+ (char *) inBufferList->mBuffers[handle->iStream[1]].mData,\r
+ stream_.convertInfo[1] );\r
+ }\r
+ else { // copy to user buffer\r
+ memcpy( stream_.userBuffer[1],\r
+ inBufferList->mBuffers[handle->iStream[1]].mData,\r
+ inBufferList->mBuffers[handle->iStream[1]].mDataByteSize );\r
+ }\r
+ }\r
+ else { // read from multiple streams\r
+ Float32 *outBuffer = (Float32 *) stream_.userBuffer[1];\r
+ if ( stream_.doConvertBuffer[1] ) outBuffer = (Float32 *) stream_.deviceBuffer;\r
+\r
+ if ( stream_.deviceInterleaved[1] == false ) { // mono mode\r
+ UInt32 bufferBytes = inBufferList->mBuffers[handle->iStream[1]].mDataByteSize;\r
+ for ( unsigned int i=0; i<stream_.nUserChannels[1]; i++ ) {\r
+ memcpy( (void *)&outBuffer[i*stream_.bufferSize],\r
+ inBufferList->mBuffers[handle->iStream[1]+i].mData, bufferBytes );\r
+ }\r
+ }\r
+ else { // read from multiple multi-channel streams\r
+ UInt32 streamChannels, channelsLeft, inJump, outJump, outOffset;\r
+ Float32 *out, *in;\r
+\r
+ bool outInterleaved = ( stream_.userInterleaved ) ? true : false;\r
+ UInt32 outChannels = stream_.nUserChannels[1];\r
+ if ( stream_.doConvertBuffer[1] ) {\r
+ outInterleaved = true; // device buffer will always be interleaved for nStreams > 1 and not mono mode\r
+ outChannels = stream_.nDeviceChannels[1];\r
+ }\r
+\r
+ if ( outInterleaved ) outOffset = 1;\r
+ else outOffset = stream_.bufferSize;\r
+\r
+ channelsLeft = outChannels;\r
+ for ( unsigned int i=0; i<handle->nStreams[1]; i++ ) {\r
+ out = outBuffer;\r
+ in = (Float32 *) inBufferList->mBuffers[handle->iStream[1]+i].mData;\r
+ streamChannels = inBufferList->mBuffers[handle->iStream[1]+i].mNumberChannels;\r
+\r
+ inJump = 0;\r
+ // Account for possible channel offset in first stream\r
+ if ( i == 0 && stream_.channelOffset[1] > 0 ) {\r
+ streamChannels -= stream_.channelOffset[1];\r
+ inJump = stream_.channelOffset[1];\r
+ in += inJump;\r
+ }\r
+\r
+ // Account for possible unread channels at end of the last stream\r
+ if ( streamChannels > channelsLeft ) {\r
+ inJump = streamChannels - channelsLeft;\r
+ streamChannels = channelsLeft;\r
+ }\r
+\r
+ // Determine output buffer offsets and skips\r
+ if ( outInterleaved ) {\r
+ outJump = outChannels;\r
+ out += outChannels - channelsLeft;\r
+ }\r
+ else {\r
+ outJump = 1;\r
+ out += (outChannels - channelsLeft) * outOffset;\r
+ }\r
+\r
+ for ( unsigned int i=0; i<stream_.bufferSize; i++ ) {\r
+ for ( unsigned int j=0; j<streamChannels; j++ ) {\r
+ out[j*outOffset] = *in++;\r
+ }\r
+ out += outJump;\r
+ in += inJump;\r
+ }\r
+ channelsLeft -= streamChannels;\r
+ }\r
+ }\r
+ \r
+ if ( stream_.doConvertBuffer[1] ) { // convert from our internal "device" buffer\r
+ convertBuffer( stream_.userBuffer[1],\r
+ stream_.deviceBuffer,\r
+ stream_.convertInfo[1] );\r
+ }\r
+ }\r
+ }\r
+\r
+ unlock:\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ RtApi::tickStreamTime();\r
+ return SUCCESS;\r
+}\r
+\r
+const char* RtApiCore :: getErrorCode( OSStatus code )\r
+{\r
+ switch( code ) {\r
+\r
+ case kAudioHardwareNotRunningError:\r
+ return "kAudioHardwareNotRunningError";\r
+\r
+ case kAudioHardwareUnspecifiedError:\r
+ return "kAudioHardwareUnspecifiedError";\r
+\r
+ case kAudioHardwareUnknownPropertyError:\r
+ return "kAudioHardwareUnknownPropertyError";\r
+\r
+ case kAudioHardwareBadPropertySizeError:\r
+ return "kAudioHardwareBadPropertySizeError";\r
+\r
+ case kAudioHardwareIllegalOperationError:\r
+ return "kAudioHardwareIllegalOperationError";\r
+\r
+ case kAudioHardwareBadObjectError:\r
+ return "kAudioHardwareBadObjectError";\r
+\r
+ case kAudioHardwareBadDeviceError:\r
+ return "kAudioHardwareBadDeviceError";\r
+\r
+ case kAudioHardwareBadStreamError:\r
+ return "kAudioHardwareBadStreamError";\r
+\r
+ case kAudioHardwareUnsupportedOperationError:\r
+ return "kAudioHardwareUnsupportedOperationError";\r
+\r
+ case kAudioDeviceUnsupportedFormatError:\r
+ return "kAudioDeviceUnsupportedFormatError";\r
+\r
+ case kAudioDevicePermissionsError:\r
+ return "kAudioDevicePermissionsError";\r
+\r
+ default:\r
+ return "CoreAudio unknown error";\r
+ }\r
+}\r
+\r
+ //******************** End of __MACOSX_CORE__ *********************//\r
+#endif\r
+\r
+#if defined(__UNIX_JACK__)\r
+\r
+// JACK is a low-latency audio server, originally written for the\r
+// GNU/Linux operating system and now also ported to OS-X. It can\r
+// connect a number of different applications to an audio device, as\r
+// well as allowing them to share audio between themselves.\r
+//\r
+// When using JACK with RtAudio, "devices" refer to JACK clients that\r
+// have ports connected to the server. The JACK server is typically\r
+// started in a terminal as follows:\r
+//\r
+// .jackd -d alsa -d hw:0\r
+//\r
+// or through an interface program such as qjackctl. Many of the\r
+// parameters normally set for a stream are fixed by the JACK server\r
+// and can be specified when the JACK server is started. In\r
+// particular,\r
+//\r
+// .jackd -d alsa -d hw:0 -r 44100 -p 512 -n 4\r
+//\r
+// specifies a sample rate of 44100 Hz, a buffer size of 512 sample\r
+// frames, and number of buffers = 4. Once the server is running, it\r
+// is not possible to override these values. If the values are not\r
+// specified in the command-line, the JACK server uses default values.\r
+//\r
+// The JACK server does not have to be running when an instance of\r
+// RtApiJack is created, though the function getDeviceCount() will\r
+// report 0 devices found until JACK has been started. When no\r
+// devices are available (i.e., the JACK server is not running), a\r
+// stream cannot be opened.\r
+\r
+#include <jack/jack.h>\r
+#include <unistd.h>\r
+#include <cstdio>\r
+\r
+// A structure to hold various information related to the Jack API\r
+// implementation.\r
+struct JackHandle {\r
+ jack_client_t *client;\r
+ jack_port_t **ports[2];\r
+ std::string deviceName[2];\r
+ bool xrun[2];\r
+ pthread_cond_t condition;\r
+ int drainCounter; // Tracks callback counts when draining\r
+ bool internalDrain; // Indicates if stop is initiated from callback or not.\r
+\r
+ JackHandle()\r
+ :client(0), drainCounter(0), internalDrain(false) { ports[0] = 0; ports[1] = 0; xrun[0] = false; xrun[1] = false; }\r
+};\r
+\r
+ThreadHandle threadId;\r
+void jackSilentError( const char * ) {};\r
+\r
+RtApiJack :: RtApiJack()\r
+{\r
+ // Nothing to do here.\r
+#if !defined(__RTAUDIO_DEBUG__)\r
+ // Turn off Jack's internal error reporting.\r
+ jack_set_error_function( &jackSilentError );\r
+#endif\r
+}\r
+\r
+RtApiJack :: ~RtApiJack()\r
+{\r
+ if ( stream_.state != STREAM_CLOSED ) closeStream();\r
+}\r
+\r
+unsigned int RtApiJack :: getDeviceCount( void )\r
+{\r
+ // See if we can become a jack client.\r
+ jack_options_t options = (jack_options_t) ( JackNoStartServer ); //JackNullOption;\r
+ jack_status_t *status = NULL;\r
+ jack_client_t *client = jack_client_open( "RtApiJackCount", options, status );\r
+ if ( client == 0 ) return 0;\r
+\r
+ const char **ports;\r
+ std::string port, previousPort;\r
+ unsigned int nChannels = 0, nDevices = 0;\r
+ ports = jack_get_ports( client, NULL, NULL, 0 );\r
+ if ( ports ) {\r
+ // Parse the port names up to the first colon (:).\r
+ size_t iColon = 0;\r
+ do {\r
+ port = (char *) ports[ nChannels ];\r
+ iColon = port.find(":");\r
+ if ( iColon != std::string::npos ) {\r
+ port = port.substr( 0, iColon + 1 );\r
+ if ( port != previousPort ) {\r
+ nDevices++;\r
+ previousPort = port;\r
+ }\r
+ }\r
+ } while ( ports[++nChannels] );\r
+ free( ports );\r
+ }\r
+\r
+ jack_client_close( client );\r
+ return nDevices;\r
+}\r
+\r
+RtAudio::DeviceInfo RtApiJack :: getDeviceInfo( unsigned int device )\r
+{\r
+ RtAudio::DeviceInfo info;\r
+ info.probed = false;\r
+\r
+ jack_options_t options = (jack_options_t) ( JackNoStartServer ); //JackNullOption\r
+ jack_status_t *status = NULL;\r
+ jack_client_t *client = jack_client_open( "RtApiJackInfo", options, status );\r
+ if ( client == 0 ) {\r
+ errorText_ = "RtApiJack::getDeviceInfo: Jack server not found or connection error!";\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ const char **ports;\r
+ std::string port, previousPort;\r
+ unsigned int nPorts = 0, nDevices = 0;\r
+ ports = jack_get_ports( client, NULL, NULL, 0 );\r
+ if ( ports ) {\r
+ // Parse the port names up to the first colon (:).\r
+ size_t iColon = 0;\r
+ do {\r
+ port = (char *) ports[ nPorts ];\r
+ iColon = port.find(":");\r
+ if ( iColon != std::string::npos ) {\r
+ port = port.substr( 0, iColon );\r
+ if ( port != previousPort ) {\r
+ if ( nDevices == device ) info.name = port;\r
+ nDevices++;\r
+ previousPort = port;\r
+ }\r
+ }\r
+ } while ( ports[++nPorts] );\r
+ free( ports );\r
+ }\r
+\r
+ if ( device >= nDevices ) {\r
+ errorText_ = "RtApiJack::getDeviceInfo: device ID is invalid!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ // Get the current jack server sample rate.\r
+ info.sampleRates.clear();\r
+ info.sampleRates.push_back( jack_get_sample_rate( client ) );\r
+\r
+ // Count the available ports containing the client name as device\r
+ // channels. Jack "input ports" equal RtAudio output channels.\r
+ unsigned int nChannels = 0;\r
+ ports = jack_get_ports( client, info.name.c_str(), NULL, JackPortIsInput );\r
+ if ( ports ) {\r
+ while ( ports[ nChannels ] ) nChannels++;\r
+ free( ports );\r
+ info.outputChannels = nChannels;\r
+ }\r
+\r
+ // Jack "output ports" equal RtAudio input channels.\r
+ nChannels = 0;\r
+ ports = jack_get_ports( client, info.name.c_str(), NULL, JackPortIsOutput );\r
+ if ( ports ) {\r
+ while ( ports[ nChannels ] ) nChannels++;\r
+ free( ports );\r
+ info.inputChannels = nChannels;\r
+ }\r
+\r
+ if ( info.outputChannels == 0 && info.inputChannels == 0 ) {\r
+ jack_client_close(client);\r
+ errorText_ = "RtApiJack::getDeviceInfo: error determining Jack input/output channels!";\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // If device opens for both playback and capture, we determine the channels.\r
+ if ( info.outputChannels > 0 && info.inputChannels > 0 )\r
+ info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;\r
+\r
+ // Jack always uses 32-bit floats.\r
+ info.nativeFormats = RTAUDIO_FLOAT32;\r
+\r
+ // Jack doesn't provide default devices so we'll use the first available one.\r
+ if ( device == 0 && info.outputChannels > 0 )\r
+ info.isDefaultOutput = true;\r
+ if ( device == 0 && info.inputChannels > 0 )\r
+ info.isDefaultInput = true;\r
+\r
+ jack_client_close(client);\r
+ info.probed = true;\r
+ return info;\r
+}\r
+\r
+int jackCallbackHandler( jack_nframes_t nframes, void *infoPointer )\r
+{\r
+ CallbackInfo *info = (CallbackInfo *) infoPointer;\r
+\r
+ RtApiJack *object = (RtApiJack *) info->object;\r
+ if ( object->callbackEvent( (unsigned long) nframes ) == false ) return 1;\r
+\r
+ return 0;\r
+}\r
+\r
+// This function will be called by a spawned thread when the Jack\r
+// server signals that it is shutting down. It is necessary to handle\r
+// it this way because the jackShutdown() function must return before\r
+// the jack_deactivate() function (in closeStream()) will return.\r
+extern "C" void *jackCloseStream( void *ptr )\r
+{\r
+ CallbackInfo *info = (CallbackInfo *) ptr;\r
+ RtApiJack *object = (RtApiJack *) info->object;\r
+\r
+ object->closeStream();\r
+\r
+ pthread_exit( NULL );\r
+}\r
+void jackShutdown( void *infoPointer )\r
+{\r
+ CallbackInfo *info = (CallbackInfo *) infoPointer;\r
+ RtApiJack *object = (RtApiJack *) info->object;\r
+\r
+ // Check current stream state. If stopped, then we'll assume this\r
+ // was called as a result of a call to RtApiJack::stopStream (the\r
+ // deactivation of a client handle causes this function to be called).\r
+ // If not, we'll assume the Jack server is shutting down or some\r
+ // other problem occurred and we should close the stream.\r
+ if ( object->isStreamRunning() == false ) return;\r
+\r
+ pthread_create( &threadId, NULL, jackCloseStream, info );\r
+ std::cerr << "\nRtApiJack: the Jack server is shutting down this client ... stream stopped and closed!!\n" << std::endl;\r
+}\r
+\r
+int jackXrun( void *infoPointer )\r
+{\r
+ JackHandle *handle = (JackHandle *) infoPointer;\r
+\r
+ if ( handle->ports[0] ) handle->xrun[0] = true;\r
+ if ( handle->ports[1] ) handle->xrun[1] = true;\r
+\r
+ return 0;\r
+}\r
+\r
+bool RtApiJack :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,\r
+ unsigned int firstChannel, unsigned int sampleRate,\r
+ RtAudioFormat format, unsigned int *bufferSize,\r
+ RtAudio::StreamOptions *options )\r
+{\r
+ JackHandle *handle = (JackHandle *) stream_.apiHandle;\r
+\r
+ // Look for jack server and try to become a client (only do once per stream).\r
+ jack_client_t *client = 0;\r
+ if ( mode == OUTPUT || ( mode == INPUT && stream_.mode != OUTPUT ) ) {\r
+ jack_options_t jackoptions = (jack_options_t) ( JackNoStartServer ); //JackNullOption;\r
+ jack_status_t *status = NULL;\r
+ if ( options && !options->streamName.empty() )\r
+ client = jack_client_open( options->streamName.c_str(), jackoptions, status );\r
+ else\r
+ client = jack_client_open( "RtApiJack", jackoptions, status );\r
+ if ( client == 0 ) {\r
+ errorText_ = "RtApiJack::probeDeviceOpen: Jack server not found or connection error!";\r
+ error( RtError::WARNING );\r
+ return FAILURE;\r
+ }\r
+ }\r
+ else {\r
+ // The handle must have been created on an earlier pass.\r
+ client = handle->client;\r
+ }\r
+\r
+ const char **ports;\r
+ std::string port, previousPort, deviceName;\r
+ unsigned int nPorts = 0, nDevices = 0;\r
+ ports = jack_get_ports( client, NULL, NULL, 0 );\r
+ if ( ports ) {\r
+ // Parse the port names up to the first colon (:).\r
+ size_t iColon = 0;\r
+ do {\r
+ port = (char *) ports[ nPorts ];\r
+ iColon = port.find(":");\r
+ if ( iColon != std::string::npos ) {\r
+ port = port.substr( 0, iColon );\r
+ if ( port != previousPort ) {\r
+ if ( nDevices == device ) deviceName = port;\r
+ nDevices++;\r
+ previousPort = port;\r
+ }\r
+ }\r
+ } while ( ports[++nPorts] );\r
+ free( ports );\r
+ }\r
+\r
+ if ( device >= nDevices ) {\r
+ errorText_ = "RtApiJack::probeDeviceOpen: device ID is invalid!";\r
+ return FAILURE;\r
+ }\r
+\r
+ // Count the available ports containing the client name as device\r
+ // channels. Jack "input ports" equal RtAudio output channels.\r
+ unsigned int nChannels = 0;\r
+ unsigned long flag = JackPortIsInput;\r
+ if ( mode == INPUT ) flag = JackPortIsOutput;\r
+ ports = jack_get_ports( client, deviceName.c_str(), NULL, flag );\r
+ if ( ports ) {\r
+ while ( ports[ nChannels ] ) nChannels++;\r
+ free( ports );\r
+ }\r
+\r
+ // Compare the jack ports for specified client to the requested number of channels.\r
+ if ( nChannels < (channels + firstChannel) ) {\r
+ errorStream_ << "RtApiJack::probeDeviceOpen: requested number of channels (" << channels << ") + offset (" << firstChannel << ") not found for specified device (" << device << ":" << deviceName << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Check the jack server sample rate.\r
+ unsigned int jackRate = jack_get_sample_rate( client );\r
+ if ( sampleRate != jackRate ) {\r
+ jack_client_close( client );\r
+ errorStream_ << "RtApiJack::probeDeviceOpen: the requested sample rate (" << sampleRate << ") is different than the JACK server rate (" << jackRate << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ stream_.sampleRate = jackRate;\r
+\r
+ // Get the latency of the JACK port.\r
+ ports = jack_get_ports( client, deviceName.c_str(), NULL, flag );\r
+ if ( ports[ firstChannel ] )\r
+ stream_.latency[mode] = jack_port_get_latency( jack_port_by_name( client, ports[ firstChannel ] ) );\r
+ free( ports );\r
+\r
+ // The jack server always uses 32-bit floating-point data.\r
+ stream_.deviceFormat[mode] = RTAUDIO_FLOAT32;\r
+ stream_.userFormat = format;\r
+\r
+ if ( options && options->flags & RTAUDIO_NONINTERLEAVED ) stream_.userInterleaved = false;\r
+ else stream_.userInterleaved = true;\r
+\r
+ // Jack always uses non-interleaved buffers.\r
+ stream_.deviceInterleaved[mode] = false;\r
+\r
+ // Jack always provides host byte-ordered data.\r
+ stream_.doByteSwap[mode] = false;\r
+\r
+ // Get the buffer size. The buffer size and number of buffers\r
+ // (periods) is set when the jack server is started.\r
+ stream_.bufferSize = (int) jack_get_buffer_size( client );\r
+ *bufferSize = stream_.bufferSize;\r
+\r
+ stream_.nDeviceChannels[mode] = channels;\r
+ stream_.nUserChannels[mode] = channels;\r
+\r
+ // Set flags for buffer conversion.\r
+ stream_.doConvertBuffer[mode] = false;\r
+ if ( stream_.userFormat != stream_.deviceFormat[mode] )\r
+ stream_.doConvertBuffer[mode] = true;\r
+ if ( stream_.userInterleaved != stream_.deviceInterleaved[mode] &&\r
+ stream_.nUserChannels[mode] > 1 )\r
+ stream_.doConvertBuffer[mode] = true;\r
+\r
+ // Allocate our JackHandle structure for the stream.\r
+ if ( handle == 0 ) {\r
+ try {\r
+ handle = new JackHandle;\r
+ }\r
+ catch ( std::bad_alloc& ) {\r
+ errorText_ = "RtApiJack::probeDeviceOpen: error allocating JackHandle memory.";\r
+ goto error;\r
+ }\r
+\r
+ if ( pthread_cond_init(&handle->condition, NULL) ) {\r
+ errorText_ = "RtApiJack::probeDeviceOpen: error initializing pthread condition variable.";\r
+ goto error;\r
+ }\r
+ stream_.apiHandle = (void *) handle;\r
+ handle->client = client;\r
+ }\r
+ handle->deviceName[mode] = deviceName;\r
+\r
+ // Allocate necessary internal buffers.\r
+ unsigned long bufferBytes;\r
+ bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );\r
+ stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.userBuffer[mode] == NULL ) {\r
+ errorText_ = "RtApiJack::probeDeviceOpen: error allocating user buffer memory.";\r
+ goto error;\r
+ }\r
+\r
+ if ( stream_.doConvertBuffer[mode] ) {\r
+\r
+ bool makeBuffer = true;\r
+ if ( mode == OUTPUT )\r
+ bufferBytes = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );\r
+ else { // mode == INPUT\r
+ bufferBytes = stream_.nDeviceChannels[1] * formatBytes( stream_.deviceFormat[1] );\r
+ if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {\r
+ unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes(stream_.deviceFormat[0]);\r
+ if ( bufferBytes < bytesOut ) makeBuffer = false;\r
+ }\r
+ }\r
+\r
+ if ( makeBuffer ) {\r
+ bufferBytes *= *bufferSize;\r
+ if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.deviceBuffer == NULL ) {\r
+ errorText_ = "RtApiJack::probeDeviceOpen: error allocating device buffer memory.";\r
+ goto error;\r
+ }\r
+ }\r
+ }\r
+\r
+ // Allocate memory for the Jack ports (channels) identifiers.\r
+ handle->ports[mode] = (jack_port_t **) malloc ( sizeof (jack_port_t *) * channels );\r
+ if ( handle->ports[mode] == NULL ) {\r
+ errorText_ = "RtApiJack::probeDeviceOpen: error allocating port memory.";\r
+ goto error;\r
+ }\r
+\r
+ stream_.device[mode] = device;\r
+ stream_.channelOffset[mode] = firstChannel;\r
+ stream_.state = STREAM_STOPPED;\r
+ stream_.callbackInfo.object = (void *) this;\r
+\r
+ if ( stream_.mode == OUTPUT && mode == INPUT )\r
+ // We had already set up the stream for output.\r
+ stream_.mode = DUPLEX;\r
+ else {\r
+ stream_.mode = mode;\r
+ jack_set_process_callback( handle->client, jackCallbackHandler, (void *) &stream_.callbackInfo );\r
+ jack_set_xrun_callback( handle->client, jackXrun, (void *) &handle );\r
+ jack_on_shutdown( handle->client, jackShutdown, (void *) &stream_.callbackInfo );\r
+ }\r
+\r
+ // Register our ports.\r
+ char label[64];\r
+ if ( mode == OUTPUT ) {\r
+ for ( unsigned int i=0; i<stream_.nUserChannels[0]; i++ ) {\r
+ snprintf( label, 64, "outport %d", i );\r
+ handle->ports[0][i] = jack_port_register( handle->client, (const char *)label,\r
+ JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0 );\r
+ }\r
+ }\r
+ else {\r
+ for ( unsigned int i=0; i<stream_.nUserChannels[1]; i++ ) {\r
+ snprintf( label, 64, "inport %d", i );\r
+ handle->ports[1][i] = jack_port_register( handle->client, (const char *)label,\r
+ JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0 );\r
+ }\r
+ }\r
+\r
+ // Setup the buffer conversion information structure. We don't use\r
+ // buffers to do channel offsets, so we override that parameter\r
+ // here.\r
+ if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, 0 );\r
+\r
+ return SUCCESS;\r
+\r
+ error:\r
+ if ( handle ) {\r
+ pthread_cond_destroy( &handle->condition );\r
+ jack_client_close( handle->client );\r
+\r
+ if ( handle->ports[0] ) free( handle->ports[0] );\r
+ if ( handle->ports[1] ) free( handle->ports[1] );\r
+\r
+ delete handle;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ return FAILURE;\r
+}\r
+\r
+void RtApiJack :: closeStream( void )\r
+{\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiJack::closeStream(): no open stream to close!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ JackHandle *handle = (JackHandle *) stream_.apiHandle;\r
+ if ( handle ) {\r
+\r
+ if ( stream_.state == STREAM_RUNNING )\r
+ jack_deactivate( handle->client );\r
+\r
+ jack_client_close( handle->client );\r
+ }\r
+\r
+ if ( handle ) {\r
+ if ( handle->ports[0] ) free( handle->ports[0] );\r
+ if ( handle->ports[1] ) free( handle->ports[1] );\r
+ pthread_cond_destroy( &handle->condition );\r
+ delete handle;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ stream_.mode = UNINITIALIZED;\r
+ stream_.state = STREAM_CLOSED;\r
+}\r
+\r
+void RtApiJack :: startStream( void )\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_RUNNING ) {\r
+ errorText_ = "RtApiJack::startStream(): the stream is already running!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ MUTEX_LOCK(&stream_.mutex);\r
+\r
+ JackHandle *handle = (JackHandle *) stream_.apiHandle;\r
+ int result = jack_activate( handle->client );\r
+ if ( result ) {\r
+ errorText_ = "RtApiJack::startStream(): unable to activate JACK client!";\r
+ goto unlock;\r
+ }\r
+\r
+ const char **ports;\r
+\r
+ // Get the list of available ports.\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+ result = 1;\r
+ ports = jack_get_ports( handle->client, handle->deviceName[0].c_str(), NULL, JackPortIsInput);\r
+ if ( ports == NULL) {\r
+ errorText_ = "RtApiJack::startStream(): error determining available JACK input ports!";\r
+ goto unlock;\r
+ }\r
+\r
+ // Now make the port connections. Since RtAudio wasn't designed to\r
+ // allow the user to select particular channels of a device, we'll\r
+ // just open the first "nChannels" ports with offset.\r
+ for ( unsigned int i=0; i<stream_.nUserChannels[0]; i++ ) {\r
+ result = 1;\r
+ if ( ports[ stream_.channelOffset[0] + i ] )\r
+ result = jack_connect( handle->client, jack_port_name( handle->ports[0][i] ), ports[ stream_.channelOffset[0] + i ] );\r
+ if ( result ) {\r
+ free( ports );\r
+ errorText_ = "RtApiJack::startStream(): error connecting output ports!";\r
+ goto unlock;\r
+ }\r
+ }\r
+ free(ports);\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {\r
+ result = 1;\r
+ ports = jack_get_ports( handle->client, handle->deviceName[1].c_str(), NULL, JackPortIsOutput );\r
+ if ( ports == NULL) {\r
+ errorText_ = "RtApiJack::startStream(): error determining available JACK output ports!";\r
+ goto unlock;\r
+ }\r
+\r
+ // Now make the port connections. See note above.\r
+ for ( unsigned int i=0; i<stream_.nUserChannels[1]; i++ ) {\r
+ result = 1;\r
+ if ( ports[ stream_.channelOffset[1] + i ] )\r
+ result = jack_connect( handle->client, ports[ stream_.channelOffset[1] + i ], jack_port_name( handle->ports[1][i] ) );\r
+ if ( result ) {\r
+ free( ports );\r
+ errorText_ = "RtApiJack::startStream(): error connecting input ports!";\r
+ goto unlock;\r
+ }\r
+ }\r
+ free(ports);\r
+ }\r
+\r
+ handle->drainCounter = 0;\r
+ handle->internalDrain = false;\r
+ stream_.state = STREAM_RUNNING;\r
+\r
+ unlock:\r
+ MUTEX_UNLOCK(&stream_.mutex);\r
+\r
+ if ( result == 0 ) return;\r
+ error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiJack :: stopStream( void )\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiJack::stopStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return;\r
+ }\r
+\r
+ JackHandle *handle = (JackHandle *) stream_.apiHandle;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+\r
+ if ( handle->drainCounter == 0 ) {\r
+ handle->drainCounter = 2;\r
+ pthread_cond_wait( &handle->condition, &stream_.mutex ); // block until signaled\r
+ }\r
+ }\r
+\r
+ jack_deactivate( handle->client );\r
+ stream_.state = STREAM_STOPPED;\r
+\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+}\r
+\r
+void RtApiJack :: abortStream( void )\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiJack::abortStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ JackHandle *handle = (JackHandle *) stream_.apiHandle;\r
+ handle->drainCounter = 2;\r
+\r
+ stopStream();\r
+}\r
+\r
+// This function will be called by a spawned thread when the user\r
+// callback function signals that the stream should be stopped or\r
+// aborted. It is necessary to handle it this way because the\r
+// callbackEvent() function must return before the jack_deactivate()\r
+// function will return.\r
+extern "C" void *jackStopStream( void *ptr )\r
+{\r
+ CallbackInfo *info = (CallbackInfo *) ptr;\r
+ RtApiJack *object = (RtApiJack *) info->object;\r
+\r
+ object->stopStream();\r
+\r
+ pthread_exit( NULL );\r
+}\r
+\r
+bool RtApiJack :: callbackEvent( unsigned long nframes )\r
+{\r
+ if ( stream_.state == STREAM_STOPPED ) return SUCCESS;\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiCore::callbackEvent(): the stream is closed ... this shouldn't happen!";\r
+ error( RtError::WARNING );\r
+ return FAILURE;\r
+ }\r
+ if ( stream_.bufferSize != nframes ) {\r
+ errorText_ = "RtApiCore::callbackEvent(): the JACK buffer size has changed ... cannot process!";\r
+ error( RtError::WARNING );\r
+ return FAILURE;\r
+ }\r
+\r
+ CallbackInfo *info = (CallbackInfo *) &stream_.callbackInfo;\r
+ JackHandle *handle = (JackHandle *) stream_.apiHandle;\r
+\r
+ // Check if we were draining the stream and signal is finished.\r
+ if ( handle->drainCounter > 3 ) {\r
+ if ( handle->internalDrain == true )\r
+ pthread_create( &threadId, NULL, jackStopStream, info );\r
+ else\r
+ pthread_cond_signal( &handle->condition );\r
+ return SUCCESS;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ // The state might change while waiting on a mutex.\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return SUCCESS;\r
+ }\r
+\r
+ // Invoke user callback first, to get fresh output data.\r
+ if ( handle->drainCounter == 0 ) {\r
+ RtAudioCallback callback = (RtAudioCallback) info->callback;\r
+ double streamTime = getStreamTime();\r
+ RtAudioStreamStatus status = 0;\r
+ if ( stream_.mode != INPUT && handle->xrun[0] == true ) {\r
+ status |= RTAUDIO_OUTPUT_UNDERFLOW;\r
+ handle->xrun[0] = false;\r
+ }\r
+ if ( stream_.mode != OUTPUT && handle->xrun[1] == true ) {\r
+ status |= RTAUDIO_INPUT_OVERFLOW;\r
+ handle->xrun[1] = false;\r
+ }\r
+ handle->drainCounter = callback( stream_.userBuffer[0], stream_.userBuffer[1],\r
+ stream_.bufferSize, streamTime, status, info->userData );\r
+ if ( handle->drainCounter == 2 ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ ThreadHandle id;\r
+ pthread_create( &id, NULL, jackStopStream, info );\r
+ return SUCCESS;\r
+ }\r
+ else if ( handle->drainCounter == 1 )\r
+ handle->internalDrain = true;\r
+ }\r
+\r
+ jack_default_audio_sample_t *jackbuffer;\r
+ unsigned long bufferBytes = nframes * sizeof( jack_default_audio_sample_t );\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+\r
+ if ( handle->drainCounter > 1 ) { // write zeros to the output stream\r
+\r
+ for ( unsigned int i=0; i<stream_.nDeviceChannels[0]; i++ ) {\r
+ jackbuffer = (jack_default_audio_sample_t *) jack_port_get_buffer( handle->ports[0][i], (jack_nframes_t) nframes );\r
+ memset( jackbuffer, 0, bufferBytes );\r
+ }\r
+\r
+ }\r
+ else if ( stream_.doConvertBuffer[0] ) {\r
+\r
+ convertBuffer( stream_.deviceBuffer, stream_.userBuffer[0], stream_.convertInfo[0] );\r
+\r
+ for ( unsigned int i=0; i<stream_.nDeviceChannels[0]; i++ ) {\r
+ jackbuffer = (jack_default_audio_sample_t *) jack_port_get_buffer( handle->ports[0][i], (jack_nframes_t) nframes );\r
+ memcpy( jackbuffer, &stream_.deviceBuffer[i*bufferBytes], bufferBytes );\r
+ }\r
+ }\r
+ else { // no buffer conversion\r
+ for ( unsigned int i=0; i<stream_.nUserChannels[0]; i++ ) {\r
+ jackbuffer = (jack_default_audio_sample_t *) jack_port_get_buffer( handle->ports[0][i], (jack_nframes_t) nframes );\r
+ memcpy( jackbuffer, &stream_.userBuffer[0][i*bufferBytes], bufferBytes );\r
+ }\r
+ }\r
+\r
+ if ( handle->drainCounter ) {\r
+ handle->drainCounter++;\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {\r
+\r
+ if ( stream_.doConvertBuffer[1] ) {\r
+ for ( unsigned int i=0; i<stream_.nDeviceChannels[1]; i++ ) {\r
+ jackbuffer = (jack_default_audio_sample_t *) jack_port_get_buffer( handle->ports[1][i], (jack_nframes_t) nframes );\r
+ memcpy( &stream_.deviceBuffer[i*bufferBytes], jackbuffer, bufferBytes );\r
+ }\r
+ convertBuffer( stream_.userBuffer[1], stream_.deviceBuffer, stream_.convertInfo[1] );\r
+ }\r
+ else { // no buffer conversion\r
+ for ( unsigned int i=0; i<stream_.nUserChannels[1]; i++ ) {\r
+ jackbuffer = (jack_default_audio_sample_t *) jack_port_get_buffer( handle->ports[1][i], (jack_nframes_t) nframes );\r
+ memcpy( &stream_.userBuffer[1][i*bufferBytes], jackbuffer, bufferBytes );\r
+ }\r
+ }\r
+ }\r
+\r
+ unlock:\r
+ MUTEX_UNLOCK(&stream_.mutex);\r
+\r
+ RtApi::tickStreamTime();\r
+ return SUCCESS;\r
+}\r
+ //******************** End of __UNIX_JACK__ *********************//\r
+#endif\r
+\r
+#if defined(__WINDOWS_ASIO__) // ASIO API on Windows\r
+\r
+// The ASIO API is designed around a callback scheme, so this\r
+// implementation is similar to that used for OS-X CoreAudio and Linux\r
+// Jack. The primary constraint with ASIO is that it only allows\r
+// access to a single driver at a time. Thus, it is not possible to\r
+// have more than one simultaneous RtAudio stream.\r
+//\r
+// This implementation also requires a number of external ASIO files\r
+// and a few global variables. The ASIO callback scheme does not\r
+// allow for the passing of user data, so we must create a global\r
+// pointer to our callbackInfo structure.\r
+//\r
+// On unix systems, we make use of a pthread condition variable.\r
+// Since there is no equivalent in Windows, I hacked something based\r
+// on information found in\r
+// http://www.cs.wustl.edu/~schmidt/win32-cv-1.html.\r
+\r
+#include "asiosys.h"\r
+#include "asio.h"\r
+#include "iasiothiscallresolver.h"\r
+#include "asiodrivers.h"\r
+#include <cmath>\r
+\r
+AsioDrivers drivers;\r
+ASIOCallbacks asioCallbacks;\r
+ASIODriverInfo driverInfo;\r
+CallbackInfo *asioCallbackInfo;\r
+bool asioXRun;\r
+\r
+struct AsioHandle {\r
+ int drainCounter; // Tracks callback counts when draining\r
+ bool internalDrain; // Indicates if stop is initiated from callback or not.\r
+ ASIOBufferInfo *bufferInfos;\r
+ HANDLE condition;\r
+\r
+ AsioHandle()\r
+ :drainCounter(0), internalDrain(false), bufferInfos(0) {}\r
+};\r
+\r
+// Function declarations (definitions at end of section)\r
+static const char* getAsioErrorString( ASIOError result );\r
+void sampleRateChanged( ASIOSampleRate sRate );\r
+long asioMessages( long selector, long value, void* message, double* opt );\r
+\r
+RtApiAsio :: RtApiAsio()\r
+{\r
+ // ASIO cannot run on a multi-threaded appartment. You can call\r
+ // CoInitialize beforehand, but it must be for appartment threading\r
+ // (in which case, CoInitilialize will return S_FALSE here).\r
+ coInitialized_ = false;\r
+ HRESULT hr = CoInitialize( NULL ); \r
+ if ( FAILED(hr) ) {\r
+ errorText_ = "RtApiAsio::ASIO requires a single-threaded appartment. Call CoInitializeEx(0,COINIT_APARTMENTTHREADED)";\r
+ error( RtError::WARNING );\r
+ }\r
+ coInitialized_ = true;\r
+\r
+ drivers.removeCurrentDriver();\r
+ driverInfo.asioVersion = 2;\r
+\r
+ // See note in DirectSound implementation about GetDesktopWindow().\r
+ driverInfo.sysRef = GetForegroundWindow();\r
+}\r
+\r
+RtApiAsio :: ~RtApiAsio()\r
+{\r
+ if ( stream_.state != STREAM_CLOSED ) closeStream();\r
+ if ( coInitialized_ ) CoUninitialize();\r
+}\r
+\r
+unsigned int RtApiAsio :: getDeviceCount( void )\r
+{\r
+ return (unsigned int) drivers.asioGetNumDev();\r
+}\r
+\r
+RtAudio::DeviceInfo RtApiAsio :: getDeviceInfo( unsigned int device )\r
+{\r
+ RtAudio::DeviceInfo info;\r
+ info.probed = false;\r
+\r
+ // Get device ID\r
+ unsigned int nDevices = getDeviceCount();\r
+ if ( nDevices == 0 ) {\r
+ errorText_ = "RtApiAsio::getDeviceInfo: no devices found!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ if ( device >= nDevices ) {\r
+ errorText_ = "RtApiAsio::getDeviceInfo: device ID is invalid!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ // If a stream is already open, we cannot probe other devices. Thus, use the saved results.\r
+ if ( stream_.state != STREAM_CLOSED ) {\r
+ if ( device >= devices_.size() ) {\r
+ errorText_ = "RtApiAsio::getDeviceInfo: device ID was not present before stream was opened.";\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+ return devices_[ device ];\r
+ }\r
+\r
+ char driverName[32];\r
+ ASIOError result = drivers.asioGetDriverName( (int) device, driverName, 32 );\r
+ if ( result != ASE_OK ) {\r
+ errorStream_ << "RtApiAsio::getDeviceInfo: unable to get driver name (" << getAsioErrorString( result ) << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ info.name = driverName;\r
+\r
+ if ( !drivers.loadDriver( driverName ) ) {\r
+ errorStream_ << "RtApiAsio::getDeviceInfo: unable to load driver (" << driverName << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ result = ASIOInit( &driverInfo );\r
+ if ( result != ASE_OK ) {\r
+ errorStream_ << "RtApiAsio::getDeviceInfo: error (" << getAsioErrorString( result ) << ") initializing driver (" << driverName << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Determine the device channel information.\r
+ long inputChannels, outputChannels;\r
+ result = ASIOGetChannels( &inputChannels, &outputChannels );\r
+ if ( result != ASE_OK ) {\r
+ drivers.removeCurrentDriver();\r
+ errorStream_ << "RtApiAsio::getDeviceInfo: error (" << getAsioErrorString( result ) << ") getting channel count (" << driverName << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ info.outputChannels = outputChannels;\r
+ info.inputChannels = inputChannels;\r
+ if ( info.outputChannels > 0 && info.inputChannels > 0 )\r
+ info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;\r
+\r
+ // Determine the supported sample rates.\r
+ info.sampleRates.clear();\r
+ for ( unsigned int i=0; i<MAX_SAMPLE_RATES; i++ ) {\r
+ result = ASIOCanSampleRate( (ASIOSampleRate) SAMPLE_RATES[i] );\r
+ if ( result == ASE_OK )\r
+ info.sampleRates.push_back( SAMPLE_RATES[i] );\r
+ }\r
+\r
+ // Determine supported data types ... just check first channel and assume rest are the same.\r
+ ASIOChannelInfo channelInfo;\r
+ channelInfo.channel = 0;\r
+ channelInfo.isInput = true;\r
+ if ( info.inputChannels <= 0 ) channelInfo.isInput = false;\r
+ result = ASIOGetChannelInfo( &channelInfo );\r
+ if ( result != ASE_OK ) {\r
+ drivers.removeCurrentDriver();\r
+ errorStream_ << "RtApiAsio::getDeviceInfo: error (" << getAsioErrorString( result ) << ") getting driver channel info (" << driverName << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ info.nativeFormats = 0;\r
+ if ( channelInfo.type == ASIOSTInt16MSB || channelInfo.type == ASIOSTInt16LSB )\r
+ info.nativeFormats |= RTAUDIO_SINT16;\r
+ else if ( channelInfo.type == ASIOSTInt32MSB || channelInfo.type == ASIOSTInt32LSB )\r
+ info.nativeFormats |= RTAUDIO_SINT32;\r
+ else if ( channelInfo.type == ASIOSTFloat32MSB || channelInfo.type == ASIOSTFloat32LSB )\r
+ info.nativeFormats |= RTAUDIO_FLOAT32;\r
+ else if ( channelInfo.type == ASIOSTFloat64MSB || channelInfo.type == ASIOSTFloat64LSB )\r
+ info.nativeFormats |= RTAUDIO_FLOAT64;\r
+\r
+ if ( info.outputChannels > 0 )\r
+ if ( getDefaultOutputDevice() == device ) info.isDefaultOutput = true;\r
+ if ( info.inputChannels > 0 )\r
+ if ( getDefaultInputDevice() == device ) info.isDefaultInput = true;\r
+\r
+ info.probed = true;\r
+ drivers.removeCurrentDriver();\r
+ return info;\r
+}\r
+\r
+void bufferSwitch( long index, ASIOBool processNow )\r
+{\r
+ RtApiAsio *object = (RtApiAsio *) asioCallbackInfo->object;\r
+ object->callbackEvent( index );\r
+}\r
+\r
+void RtApiAsio :: saveDeviceInfo( void )\r
+{\r
+ devices_.clear();\r
+\r
+ unsigned int nDevices = getDeviceCount();\r
+ devices_.resize( nDevices );\r
+ for ( unsigned int i=0; i<nDevices; i++ )\r
+ devices_[i] = getDeviceInfo( i );\r
+}\r
+\r
+bool RtApiAsio :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,\r
+ unsigned int firstChannel, unsigned int sampleRate,\r
+ RtAudioFormat format, unsigned int *bufferSize,\r
+ RtAudio::StreamOptions *options )\r
+{\r
+ // For ASIO, a duplex stream MUST use the same driver.\r
+ if ( mode == INPUT && stream_.mode == OUTPUT && stream_.device[0] != device ) {\r
+ errorText_ = "RtApiAsio::probeDeviceOpen: an ASIO duplex stream must use the same device for input and output!";\r
+ return FAILURE;\r
+ }\r
+\r
+ char driverName[32];\r
+ ASIOError result = drivers.asioGetDriverName( (int) device, driverName, 32 );\r
+ if ( result != ASE_OK ) {\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: unable to get driver name (" << getAsioErrorString( result ) << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // The getDeviceInfo() function will not work when a stream is open\r
+ // because ASIO does not allow multiple devices to run at the same\r
+ // time. Thus, we'll probe the system before opening a stream and\r
+ // save the results for use by getDeviceInfo().\r
+ this->saveDeviceInfo();\r
+\r
+ // Only load the driver once for duplex stream.\r
+ if ( mode != INPUT || stream_.mode != OUTPUT ) {\r
+ if ( !drivers.loadDriver( driverName ) ) {\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: unable to load driver (" << driverName << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ result = ASIOInit( &driverInfo );\r
+ if ( result != ASE_OK ) {\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: error (" << getAsioErrorString( result ) << ") initializing driver (" << driverName << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+\r
+ // Check the device channel count.\r
+ long inputChannels, outputChannels;\r
+ result = ASIOGetChannels( &inputChannels, &outputChannels );\r
+ if ( result != ASE_OK ) {\r
+ drivers.removeCurrentDriver();\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: error (" << getAsioErrorString( result ) << ") getting channel count (" << driverName << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ if ( ( mode == OUTPUT && (channels+firstChannel) > (unsigned int) outputChannels) ||\r
+ ( mode == INPUT && (channels+firstChannel) > (unsigned int) inputChannels) ) {\r
+ drivers.removeCurrentDriver();\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") does not support requested channel count (" << channels << ") + offset (" << firstChannel << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ stream_.nDeviceChannels[mode] = channels;\r
+ stream_.nUserChannels[mode] = channels;\r
+ stream_.channelOffset[mode] = firstChannel;\r
+\r
+ // Verify the sample rate is supported.\r
+ result = ASIOCanSampleRate( (ASIOSampleRate) sampleRate );\r
+ if ( result != ASE_OK ) {\r
+ drivers.removeCurrentDriver();\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") does not support requested sample rate (" << sampleRate << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Get the current sample rate\r
+ ASIOSampleRate currentRate;\r
+ result = ASIOGetSampleRate( ¤tRate );\r
+ if ( result != ASE_OK ) {\r
+ drivers.removeCurrentDriver();\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error getting sample rate.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Set the sample rate only if necessary\r
+ if ( currentRate != sampleRate ) {\r
+ result = ASIOSetSampleRate( (ASIOSampleRate) sampleRate );\r
+ if ( result != ASE_OK ) {\r
+ drivers.removeCurrentDriver();\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error setting sample rate (" << sampleRate << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+\r
+ // Determine the driver data type.\r
+ ASIOChannelInfo channelInfo;\r
+ channelInfo.channel = 0;\r
+ if ( mode == OUTPUT ) channelInfo.isInput = false;\r
+ else channelInfo.isInput = true;\r
+ result = ASIOGetChannelInfo( &channelInfo );\r
+ if ( result != ASE_OK ) {\r
+ drivers.removeCurrentDriver();\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error (" << getAsioErrorString( result ) << ") getting data format.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Assuming WINDOWS host is always little-endian.\r
+ stream_.doByteSwap[mode] = false;\r
+ stream_.userFormat = format;\r
+ stream_.deviceFormat[mode] = 0;\r
+ if ( channelInfo.type == ASIOSTInt16MSB || channelInfo.type == ASIOSTInt16LSB ) {\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT16;\r
+ if ( channelInfo.type == ASIOSTInt16MSB ) stream_.doByteSwap[mode] = true;\r
+ }\r
+ else if ( channelInfo.type == ASIOSTInt32MSB || channelInfo.type == ASIOSTInt32LSB ) {\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT32;\r
+ if ( channelInfo.type == ASIOSTInt32MSB ) stream_.doByteSwap[mode] = true;\r
+ }\r
+ else if ( channelInfo.type == ASIOSTFloat32MSB || channelInfo.type == ASIOSTFloat32LSB ) {\r
+ stream_.deviceFormat[mode] = RTAUDIO_FLOAT32;\r
+ if ( channelInfo.type == ASIOSTFloat32MSB ) stream_.doByteSwap[mode] = true;\r
+ }\r
+ else if ( channelInfo.type == ASIOSTFloat64MSB || channelInfo.type == ASIOSTFloat64LSB ) {\r
+ stream_.deviceFormat[mode] = RTAUDIO_FLOAT64;\r
+ if ( channelInfo.type == ASIOSTFloat64MSB ) stream_.doByteSwap[mode] = true;\r
+ }\r
+\r
+ if ( stream_.deviceFormat[mode] == 0 ) {\r
+ drivers.removeCurrentDriver();\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") data format not supported by RtAudio.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Set the buffer size. For a duplex stream, this will end up\r
+ // setting the buffer size based on the input constraints, which\r
+ // should be ok.\r
+ long minSize, maxSize, preferSize, granularity;\r
+ result = ASIOGetBufferSize( &minSize, &maxSize, &preferSize, &granularity );\r
+ if ( result != ASE_OK ) {\r
+ drivers.removeCurrentDriver();\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error (" << getAsioErrorString( result ) << ") getting buffer size.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ if ( *bufferSize < (unsigned int) minSize ) *bufferSize = (unsigned int) minSize;\r
+ else if ( *bufferSize > (unsigned int) maxSize ) *bufferSize = (unsigned int) maxSize;\r
+ else if ( granularity == -1 ) {\r
+ // Make sure bufferSize is a power of two.\r
+ int log2_of_min_size = 0;\r
+ int log2_of_max_size = 0;\r
+\r
+ for ( unsigned int i = 0; i < sizeof(long) * 8; i++ ) {\r
+ if ( minSize & ((long)1 << i) ) log2_of_min_size = i;\r
+ if ( maxSize & ((long)1 << i) ) log2_of_max_size = i;\r
+ }\r
+\r
+ long min_delta = std::abs( (long)*bufferSize - ((long)1 << log2_of_min_size) );\r
+ int min_delta_num = log2_of_min_size;\r
+\r
+ for (int i = log2_of_min_size + 1; i <= log2_of_max_size; i++) {\r
+ long current_delta = std::abs( (long)*bufferSize - ((long)1 << i) );\r
+ if (current_delta < min_delta) {\r
+ min_delta = current_delta;\r
+ min_delta_num = i;\r
+ }\r
+ }\r
+\r
+ *bufferSize = ( (unsigned int)1 << min_delta_num );\r
+ if ( *bufferSize < (unsigned int) minSize ) *bufferSize = (unsigned int) minSize;\r
+ else if ( *bufferSize > (unsigned int) maxSize ) *bufferSize = (unsigned int) maxSize;\r
+ }\r
+ else if ( granularity != 0 ) {\r
+ // Set to an even multiple of granularity, rounding up.\r
+ *bufferSize = (*bufferSize + granularity-1) / granularity * granularity;\r
+ }\r
+\r
+ if ( mode == INPUT && stream_.mode == OUTPUT && stream_.bufferSize != *bufferSize ) {\r
+ drivers.removeCurrentDriver();\r
+ errorText_ = "RtApiAsio::probeDeviceOpen: input/output buffersize discrepancy!";\r
+ return FAILURE;\r
+ }\r
+\r
+ stream_.bufferSize = *bufferSize;\r
+ stream_.nBuffers = 2;\r
+\r
+ if ( options && options->flags & RTAUDIO_NONINTERLEAVED ) stream_.userInterleaved = false;\r
+ else stream_.userInterleaved = true;\r
+\r
+ // ASIO always uses non-interleaved buffers.\r
+ stream_.deviceInterleaved[mode] = false;\r
+\r
+ // Allocate, if necessary, our AsioHandle structure for the stream.\r
+ AsioHandle *handle = (AsioHandle *) stream_.apiHandle;\r
+ if ( handle == 0 ) {\r
+ try {\r
+ handle = new AsioHandle;\r
+ }\r
+ catch ( std::bad_alloc& ) {\r
+ //if ( handle == NULL ) { \r
+ drivers.removeCurrentDriver();\r
+ errorText_ = "RtApiAsio::probeDeviceOpen: error allocating AsioHandle memory.";\r
+ return FAILURE;\r
+ }\r
+ handle->bufferInfos = 0;\r
+\r
+ // Create a manual-reset event.\r
+ handle->condition = CreateEvent( NULL, // no security\r
+ TRUE, // manual-reset\r
+ FALSE, // non-signaled initially\r
+ NULL ); // unnamed\r
+ stream_.apiHandle = (void *) handle;\r
+ }\r
+\r
+ // Create the ASIO internal buffers. Since RtAudio sets up input\r
+ // and output separately, we'll have to dispose of previously\r
+ // created output buffers for a duplex stream.\r
+ long inputLatency, outputLatency;\r
+ if ( mode == INPUT && stream_.mode == OUTPUT ) {\r
+ ASIODisposeBuffers();\r
+ if ( handle->bufferInfos ) free( handle->bufferInfos );\r
+ }\r
+\r
+ // Allocate, initialize, and save the bufferInfos in our stream callbackInfo structure.\r
+ bool buffersAllocated = false;\r
+ unsigned int i, nChannels = stream_.nDeviceChannels[0] + stream_.nDeviceChannels[1];\r
+ handle->bufferInfos = (ASIOBufferInfo *) malloc( nChannels * sizeof(ASIOBufferInfo) );\r
+ if ( handle->bufferInfos == NULL ) {\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: error allocating bufferInfo memory for driver (" << driverName << ").";\r
+ errorText_ = errorStream_.str();\r
+ goto error;\r
+ }\r
+\r
+ ASIOBufferInfo *infos;\r
+ infos = handle->bufferInfos;\r
+ for ( i=0; i<stream_.nDeviceChannels[0]; i++, infos++ ) {\r
+ infos->isInput = ASIOFalse;\r
+ infos->channelNum = i + stream_.channelOffset[0];\r
+ infos->buffers[0] = infos->buffers[1] = 0;\r
+ }\r
+ for ( i=0; i<stream_.nDeviceChannels[1]; i++, infos++ ) {\r
+ infos->isInput = ASIOTrue;\r
+ infos->channelNum = i + stream_.channelOffset[1];\r
+ infos->buffers[0] = infos->buffers[1] = 0;\r
+ }\r
+\r
+ // Set up the ASIO callback structure and create the ASIO data buffers.\r
+ asioCallbacks.bufferSwitch = &bufferSwitch;\r
+ asioCallbacks.sampleRateDidChange = &sampleRateChanged;\r
+ asioCallbacks.asioMessage = &asioMessages;\r
+ asioCallbacks.bufferSwitchTimeInfo = NULL;\r
+ result = ASIOCreateBuffers( handle->bufferInfos, nChannels, stream_.bufferSize, &asioCallbacks );\r
+ if ( result != ASE_OK ) {\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error (" << getAsioErrorString( result ) << ") creating buffers.";\r
+ errorText_ = errorStream_.str();\r
+ goto error;\r
+ }\r
+ buffersAllocated = true;\r
+\r
+ // Set flags for buffer conversion.\r
+ stream_.doConvertBuffer[mode] = false;\r
+ if ( stream_.userFormat != stream_.deviceFormat[mode] )\r
+ stream_.doConvertBuffer[mode] = true;\r
+ if ( stream_.userInterleaved != stream_.deviceInterleaved[mode] &&\r
+ stream_.nUserChannels[mode] > 1 )\r
+ stream_.doConvertBuffer[mode] = true;\r
+\r
+ // Allocate necessary internal buffers\r
+ unsigned long bufferBytes;\r
+ bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );\r
+ stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.userBuffer[mode] == NULL ) {\r
+ errorText_ = "RtApiAsio::probeDeviceOpen: error allocating user buffer memory.";\r
+ goto error;\r
+ }\r
+\r
+ if ( stream_.doConvertBuffer[mode] ) {\r
+\r
+ bool makeBuffer = true;\r
+ bufferBytes = stream_.nDeviceChannels[mode] * formatBytes( stream_.deviceFormat[mode] );\r
+ if ( mode == INPUT ) {\r
+ if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {\r
+ unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );\r
+ if ( bufferBytes <= bytesOut ) makeBuffer = false;\r
+ }\r
+ }\r
+\r
+ if ( makeBuffer ) {\r
+ bufferBytes *= *bufferSize;\r
+ if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.deviceBuffer == NULL ) {\r
+ errorText_ = "RtApiAsio::probeDeviceOpen: error allocating device buffer memory.";\r
+ goto error;\r
+ }\r
+ }\r
+ }\r
+\r
+ stream_.sampleRate = sampleRate;\r
+ stream_.device[mode] = device;\r
+ stream_.state = STREAM_STOPPED;\r
+ asioCallbackInfo = &stream_.callbackInfo;\r
+ stream_.callbackInfo.object = (void *) this;\r
+ if ( stream_.mode == OUTPUT && mode == INPUT )\r
+ // We had already set up an output stream.\r
+ stream_.mode = DUPLEX;\r
+ else\r
+ stream_.mode = mode;\r
+\r
+ // Determine device latencies\r
+ result = ASIOGetLatencies( &inputLatency, &outputLatency );\r
+ if ( result != ASE_OK ) {\r
+ errorStream_ << "RtApiAsio::probeDeviceOpen: driver (" << driverName << ") error (" << getAsioErrorString( result ) << ") getting latency.";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING); // warn but don't fail\r
+ }\r
+ else {\r
+ stream_.latency[0] = outputLatency;\r
+ stream_.latency[1] = inputLatency;\r
+ }\r
+\r
+ // Setup the buffer conversion information structure. We don't use\r
+ // buffers to do channel offsets, so we override that parameter\r
+ // here.\r
+ if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, 0 );\r
+\r
+ return SUCCESS;\r
+\r
+ error:\r
+ if ( buffersAllocated )\r
+ ASIODisposeBuffers();\r
+ drivers.removeCurrentDriver();\r
+\r
+ if ( handle ) {\r
+ CloseHandle( handle->condition );\r
+ if ( handle->bufferInfos )\r
+ free( handle->bufferInfos );\r
+ delete handle;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ return FAILURE;\r
+}\r
+\r
+void RtApiAsio :: closeStream()\r
+{\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiAsio::closeStream(): no open stream to close!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ if ( stream_.state == STREAM_RUNNING ) {\r
+ stream_.state = STREAM_STOPPED;\r
+ ASIOStop();\r
+ }\r
+ ASIODisposeBuffers();\r
+ drivers.removeCurrentDriver();\r
+\r
+ AsioHandle *handle = (AsioHandle *) stream_.apiHandle;\r
+ if ( handle ) {\r
+ CloseHandle( handle->condition );\r
+ if ( handle->bufferInfos )\r
+ free( handle->bufferInfos );\r
+ delete handle;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ stream_.mode = UNINITIALIZED;\r
+ stream_.state = STREAM_CLOSED;\r
+}\r
+\r
+bool stopThreadCalled = false;\r
+\r
+void RtApiAsio :: startStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_RUNNING ) {\r
+ errorText_ = "RtApiAsio::startStream(): the stream is already running!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ //MUTEX_LOCK( &stream_.mutex );\r
+\r
+ AsioHandle *handle = (AsioHandle *) stream_.apiHandle;\r
+ ASIOError result = ASIOStart();\r
+ if ( result != ASE_OK ) {\r
+ errorStream_ << "RtApiAsio::startStream: error (" << getAsioErrorString( result ) << ") starting device.";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+\r
+ handle->drainCounter = 0;\r
+ handle->internalDrain = false;\r
+ ResetEvent( handle->condition );\r
+ stream_.state = STREAM_RUNNING;\r
+ asioXRun = false;\r
+\r
+ unlock:\r
+ //MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ stopThreadCalled = false;\r
+\r
+ if ( result == ASE_OK ) return;\r
+ error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiAsio :: stopStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiAsio::stopStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ /*\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return;\r
+ }\r
+ */\r
+\r
+ AsioHandle *handle = (AsioHandle *) stream_.apiHandle;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+ if ( handle->drainCounter == 0 ) {\r
+ handle->drainCounter = 2;\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+ WaitForSingleObject( handle->condition, INFINITE ); // block until signaled\r
+ //ResetEvent( handle->condition );\r
+ // MUTEX_LOCK( &stream_.mutex );\r
+ }\r
+ }\r
+\r
+ stream_.state = STREAM_STOPPED;\r
+\r
+ ASIOError result = ASIOStop();\r
+ if ( result != ASE_OK ) {\r
+ errorStream_ << "RtApiAsio::stopStream: error (" << getAsioErrorString( result ) << ") stopping device.";\r
+ errorText_ = errorStream_.str();\r
+ }\r
+\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ if ( result == ASE_OK ) return;\r
+ error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiAsio :: abortStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiAsio::abortStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ // The following lines were commented-out because some behavior was\r
+ // noted where the device buffers need to be zeroed to avoid\r
+ // continuing sound, even when the device buffers are completely\r
+ // disposed. So now, calling abort is the same as calling stop.\r
+ // AsioHandle *handle = (AsioHandle *) stream_.apiHandle;\r
+ // handle->drainCounter = 2;\r
+ stopStream();\r
+}\r
+\r
+// This function will be called by a spawned thread when the user\r
+// callback function signals that the stream should be stopped or\r
+// aborted. It is necessary to handle it this way because the\r
+// callbackEvent() function must return before the ASIOStop()\r
+// function will return.\r
+extern "C" unsigned __stdcall asioStopStream( void *ptr )\r
+{\r
+ CallbackInfo *info = (CallbackInfo *) ptr;\r
+ RtApiAsio *object = (RtApiAsio *) info->object;\r
+\r
+ object->stopStream();\r
+\r
+ _endthreadex( 0 );\r
+ return 0;\r
+}\r
+\r
+bool RtApiAsio :: callbackEvent( long bufferIndex )\r
+{\r
+ if ( stream_.state == STREAM_STOPPED ) return SUCCESS;\r
+ if ( stopThreadCalled ) return SUCCESS;\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiAsio::callbackEvent(): the stream is closed ... this shouldn't happen!";\r
+ error( RtError::WARNING );\r
+ return FAILURE;\r
+ }\r
+\r
+ CallbackInfo *info = (CallbackInfo *) &stream_.callbackInfo;\r
+ AsioHandle *handle = (AsioHandle *) stream_.apiHandle;\r
+\r
+ // Check if we were draining the stream and signal if finished.\r
+ if ( handle->drainCounter > 3 ) {\r
+ if ( handle->internalDrain == false )\r
+ SetEvent( handle->condition );\r
+ else { // spawn a thread to stop the stream\r
+ unsigned threadId;\r
+ stopThreadCalled = true;\r
+ stream_.callbackInfo.thread = _beginthreadex( NULL, 0, &asioStopStream,\r
+ &stream_.callbackInfo, 0, &threadId );\r
+ }\r
+ return SUCCESS;\r
+ }\r
+\r
+ /*MUTEX_LOCK( &stream_.mutex );\r
+\r
+ // The state might change while waiting on a mutex.\r
+ if ( stream_.state == STREAM_STOPPED ) goto unlock; */\r
+\r
+ // Invoke user callback to get fresh output data UNLESS we are\r
+ // draining stream.\r
+ if ( handle->drainCounter == 0 ) {\r
+ RtAudioCallback callback = (RtAudioCallback) info->callback;\r
+ double streamTime = getStreamTime();\r
+ RtAudioStreamStatus status = 0;\r
+ if ( stream_.mode != INPUT && asioXRun == true ) {\r
+ status |= RTAUDIO_OUTPUT_UNDERFLOW;\r
+ asioXRun = false;\r
+ }\r
+ if ( stream_.mode != OUTPUT && asioXRun == true ) {\r
+ status |= RTAUDIO_INPUT_OVERFLOW;\r
+ asioXRun = false;\r
+ }\r
+ handle->drainCounter = callback( stream_.userBuffer[0], stream_.userBuffer[1],\r
+ stream_.bufferSize, streamTime, status, info->userData );\r
+ if ( handle->drainCounter == 2 ) {\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+ // abortStream();\r
+ unsigned threadId;\r
+ stopThreadCalled = true;\r
+ stream_.callbackInfo.thread = _beginthreadex( NULL, 0, &asioStopStream,\r
+ &stream_.callbackInfo, 0, &threadId );\r
+ return SUCCESS;\r
+ }\r
+ else if ( handle->drainCounter == 1 )\r
+ handle->internalDrain = true;\r
+ }\r
+\r
+ unsigned int nChannels, bufferBytes, i, j;\r
+ nChannels = stream_.nDeviceChannels[0] + stream_.nDeviceChannels[1];\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+\r
+ bufferBytes = stream_.bufferSize * formatBytes( stream_.deviceFormat[0] );\r
+\r
+ if ( handle->drainCounter > 1 ) { // write zeros to the output stream\r
+\r
+ for ( i=0, j=0; i<nChannels; i++ ) {\r
+ if ( handle->bufferInfos[i].isInput != ASIOTrue )\r
+ memset( handle->bufferInfos[i].buffers[bufferIndex], 0, bufferBytes );\r
+ }\r
+\r
+ }\r
+ else if ( stream_.doConvertBuffer[0] ) {\r
+\r
+ convertBuffer( stream_.deviceBuffer, stream_.userBuffer[0], stream_.convertInfo[0] );\r
+ if ( stream_.doByteSwap[0] )\r
+ byteSwapBuffer( stream_.deviceBuffer,\r
+ stream_.bufferSize * stream_.nDeviceChannels[0],\r
+ stream_.deviceFormat[0] );\r
+\r
+ for ( i=0, j=0; i<nChannels; i++ ) {\r
+ if ( handle->bufferInfos[i].isInput != ASIOTrue )\r
+ memcpy( handle->bufferInfos[i].buffers[bufferIndex],\r
+ &stream_.deviceBuffer[j++*bufferBytes], bufferBytes );\r
+ }\r
+\r
+ }\r
+ else {\r
+\r
+ if ( stream_.doByteSwap[0] )\r
+ byteSwapBuffer( stream_.userBuffer[0],\r
+ stream_.bufferSize * stream_.nUserChannels[0],\r
+ stream_.userFormat );\r
+\r
+ for ( i=0, j=0; i<nChannels; i++ ) {\r
+ if ( handle->bufferInfos[i].isInput != ASIOTrue )\r
+ memcpy( handle->bufferInfos[i].buffers[bufferIndex],\r
+ &stream_.userBuffer[0][bufferBytes*j++], bufferBytes );\r
+ }\r
+\r
+ }\r
+\r
+ if ( handle->drainCounter ) {\r
+ handle->drainCounter++;\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {\r
+\r
+ bufferBytes = stream_.bufferSize * formatBytes(stream_.deviceFormat[1]);\r
+\r
+ if (stream_.doConvertBuffer[1]) {\r
+\r
+ // Always interleave ASIO input data.\r
+ for ( i=0, j=0; i<nChannels; i++ ) {\r
+ if ( handle->bufferInfos[i].isInput == ASIOTrue )\r
+ memcpy( &stream_.deviceBuffer[j++*bufferBytes],\r
+ handle->bufferInfos[i].buffers[bufferIndex],\r
+ bufferBytes );\r
+ }\r
+\r
+ if ( stream_.doByteSwap[1] )\r
+ byteSwapBuffer( stream_.deviceBuffer,\r
+ stream_.bufferSize * stream_.nDeviceChannels[1],\r
+ stream_.deviceFormat[1] );\r
+ convertBuffer( stream_.userBuffer[1], stream_.deviceBuffer, stream_.convertInfo[1] );\r
+\r
+ }\r
+ else {\r
+ for ( i=0, j=0; i<nChannels; i++ ) {\r
+ if ( handle->bufferInfos[i].isInput == ASIOTrue ) {\r
+ memcpy( &stream_.userBuffer[1][bufferBytes*j++],\r
+ handle->bufferInfos[i].buffers[bufferIndex],\r
+ bufferBytes );\r
+ }\r
+ }\r
+\r
+ if ( stream_.doByteSwap[1] )\r
+ byteSwapBuffer( stream_.userBuffer[1],\r
+ stream_.bufferSize * stream_.nUserChannels[1],\r
+ stream_.userFormat );\r
+ }\r
+ }\r
+\r
+ unlock:\r
+ // The following call was suggested by Malte Clasen. While the API\r
+ // documentation indicates it should not be required, some device\r
+ // drivers apparently do not function correctly without it.\r
+ ASIOOutputReady();\r
+\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ RtApi::tickStreamTime();\r
+ return SUCCESS;\r
+}\r
+\r
+void sampleRateChanged( ASIOSampleRate sRate )\r
+{\r
+ // The ASIO documentation says that this usually only happens during\r
+ // external sync. Audio processing is not stopped by the driver,\r
+ // actual sample rate might not have even changed, maybe only the\r
+ // sample rate status of an AES/EBU or S/PDIF digital input at the\r
+ // audio device.\r
+\r
+ RtApi *object = (RtApi *) asioCallbackInfo->object;\r
+ try {\r
+ object->stopStream();\r
+ }\r
+ catch ( RtError &exception ) {\r
+ std::cerr << "\nRtApiAsio: sampleRateChanged() error (" << exception.getMessage() << ")!\n" << std::endl;\r
+ return;\r
+ }\r
+\r
+ std::cerr << "\nRtApiAsio: driver reports sample rate changed to " << sRate << " ... stream stopped!!!\n" << std::endl;\r
+}\r
+\r
+long asioMessages( long selector, long value, void* message, double* opt )\r
+{\r
+ long ret = 0;\r
+\r
+ switch( selector ) {\r
+ case kAsioSelectorSupported:\r
+ if ( value == kAsioResetRequest\r
+ || value == kAsioEngineVersion\r
+ || value == kAsioResyncRequest\r
+ || value == kAsioLatenciesChanged\r
+ // The following three were added for ASIO 2.0, you don't\r
+ // necessarily have to support them.\r
+ || value == kAsioSupportsTimeInfo\r
+ || value == kAsioSupportsTimeCode\r
+ || value == kAsioSupportsInputMonitor)\r
+ ret = 1L;\r
+ break;\r
+ case kAsioResetRequest:\r
+ // Defer the task and perform the reset of the driver during the\r
+ // next "safe" situation. You cannot reset the driver right now,\r
+ // as this code is called from the driver. Reset the driver is\r
+ // done by completely destruct is. I.e. ASIOStop(),\r
+ // ASIODisposeBuffers(), Destruction Afterwards you initialize the\r
+ // driver again.\r
+ std::cerr << "\nRtApiAsio: driver reset requested!!!" << std::endl;\r
+ ret = 1L;\r
+ break;\r
+ case kAsioResyncRequest:\r
+ // This informs the application that the driver encountered some\r
+ // non-fatal data loss. It is used for synchronization purposes\r
+ // of different media. Added mainly to work around the Win16Mutex\r
+ // problems in Windows 95/98 with the Windows Multimedia system,\r
+ // which could lose data because the Mutex was held too long by\r
+ // another thread. However a driver can issue it in other\r
+ // situations, too.\r
+ // std::cerr << "\nRtApiAsio: driver resync requested!!!" << std::endl;\r
+ asioXRun = true;\r
+ ret = 1L;\r
+ break;\r
+ case kAsioLatenciesChanged:\r
+ // This will inform the host application that the drivers were\r
+ // latencies changed. Beware, it this does not mean that the\r
+ // buffer sizes have changed! You might need to update internal\r
+ // delay data.\r
+ std::cerr << "\nRtApiAsio: driver latency may have changed!!!" << std::endl;\r
+ ret = 1L;\r
+ break;\r
+ case kAsioEngineVersion:\r
+ // Return the supported ASIO version of the host application. If\r
+ // a host application does not implement this selector, ASIO 1.0\r
+ // is assumed by the driver.\r
+ ret = 2L;\r
+ break;\r
+ case kAsioSupportsTimeInfo:\r
+ // Informs the driver whether the\r
+ // asioCallbacks.bufferSwitchTimeInfo() callback is supported.\r
+ // For compatibility with ASIO 1.0 drivers the host application\r
+ // should always support the "old" bufferSwitch method, too.\r
+ ret = 0;\r
+ break;\r
+ case kAsioSupportsTimeCode:\r
+ // Informs the driver whether application is interested in time\r
+ // code info. If an application does not need to know about time\r
+ // code, the driver has less work to do.\r
+ ret = 0;\r
+ break;\r
+ }\r
+ return ret;\r
+}\r
+\r
+static const char* getAsioErrorString( ASIOError result )\r
+{\r
+ struct Messages \r
+ {\r
+ ASIOError value;\r
+ const char*message;\r
+ };\r
+\r
+ static Messages m[] = \r
+ {\r
+ { ASE_NotPresent, "Hardware input or output is not present or available." },\r
+ { ASE_HWMalfunction, "Hardware is malfunctioning." },\r
+ { ASE_InvalidParameter, "Invalid input parameter." },\r
+ { ASE_InvalidMode, "Invalid mode." },\r
+ { ASE_SPNotAdvancing, "Sample position not advancing." },\r
+ { ASE_NoClock, "Sample clock or rate cannot be determined or is not present." },\r
+ { ASE_NoMemory, "Not enough memory to complete the request." }\r
+ };\r
+\r
+ for ( unsigned int i = 0; i < sizeof(m)/sizeof(m[0]); ++i )\r
+ if ( m[i].value == result ) return m[i].message;\r
+\r
+ return "Unknown error.";\r
+}\r
+//******************** End of __WINDOWS_ASIO__ *********************//\r
+#endif\r
+\r
+\r
+#if defined(__WINDOWS_DS__) // Windows DirectSound API\r
+\r
+// Modified by Robin Davies, October 2005\r
+// - Improvements to DirectX pointer chasing. \r
+// - Bug fix for non-power-of-two Asio granularity used by Edirol PCR-A30.\r
+// - Auto-call CoInitialize for DSOUND and ASIO platforms.\r
+// Various revisions for RtAudio 4.0 by Gary Scavone, April 2007\r
+// Changed device query structure for RtAudio 4.0.7, January 2010\r
+\r
+#include <dsound.h>\r
+#include <assert.h>\r
+#include <algorithm>\r
+\r
+#if defined(__MINGW32__)\r
+ // missing from latest mingw winapi\r
+#define WAVE_FORMAT_96M08 0x00010000 /* 96 kHz, Mono, 8-bit */\r
+#define WAVE_FORMAT_96S08 0x00020000 /* 96 kHz, Stereo, 8-bit */\r
+#define WAVE_FORMAT_96M16 0x00040000 /* 96 kHz, Mono, 16-bit */\r
+#define WAVE_FORMAT_96S16 0x00080000 /* 96 kHz, Stereo, 16-bit */\r
+#endif\r
+\r
+#define MINIMUM_DEVICE_BUFFER_SIZE 32768\r
+\r
+#ifdef _MSC_VER // if Microsoft Visual C++\r
+#pragma comment( lib, "winmm.lib" ) // then, auto-link winmm.lib. Otherwise, it has to be added manually.\r
+#endif\r
+\r
+static inline DWORD dsPointerBetween( DWORD pointer, DWORD laterPointer, DWORD earlierPointer, DWORD bufferSize )\r
+{\r
+ if ( pointer > bufferSize ) pointer -= bufferSize;\r
+ if ( laterPointer < earlierPointer ) laterPointer += bufferSize;\r
+ if ( pointer < earlierPointer ) pointer += bufferSize;\r
+ return pointer >= earlierPointer && pointer < laterPointer;\r
+}\r
+\r
+// A structure to hold various information related to the DirectSound\r
+// API implementation.\r
+struct DsHandle {\r
+ unsigned int drainCounter; // Tracks callback counts when draining\r
+ bool internalDrain; // Indicates if stop is initiated from callback or not.\r
+ void *id[2];\r
+ void *buffer[2];\r
+ bool xrun[2];\r
+ UINT bufferPointer[2]; \r
+ DWORD dsBufferSize[2];\r
+ DWORD dsPointerLeadTime[2]; // the number of bytes ahead of the safe pointer to lead by.\r
+ HANDLE condition;\r
+\r
+ DsHandle()\r
+ :drainCounter(0), internalDrain(false) { id[0] = 0; id[1] = 0; buffer[0] = 0; buffer[1] = 0; xrun[0] = false; xrun[1] = false; bufferPointer[0] = 0; bufferPointer[1] = 0; }\r
+};\r
+\r
+// Declarations for utility functions, callbacks, and structures\r
+// specific to the DirectSound implementation.\r
+static BOOL CALLBACK deviceQueryCallback( LPGUID lpguid,\r
+ LPCTSTR description,\r
+ LPCTSTR module,\r
+ LPVOID lpContext );\r
+\r
+static const char* getErrorString( int code );\r
+\r
+extern "C" unsigned __stdcall callbackHandler( void *ptr );\r
+\r
+struct DsDevice {\r
+ LPGUID id[2];\r
+ bool validId[2];\r
+ bool found;\r
+ std::string name;\r
+\r
+ DsDevice()\r
+ : found(false) { validId[0] = false; validId[1] = false; }\r
+};\r
+\r
+std::vector< DsDevice > dsDevices;\r
+\r
+RtApiDs :: RtApiDs()\r
+{\r
+ // Dsound will run both-threaded. If CoInitialize fails, then just\r
+ // accept whatever the mainline chose for a threading model.\r
+ coInitialized_ = false;\r
+ HRESULT hr = CoInitialize( NULL );\r
+ if ( !FAILED( hr ) ) coInitialized_ = true;\r
+}\r
+\r
+RtApiDs :: ~RtApiDs()\r
+{\r
+ if ( coInitialized_ ) CoUninitialize(); // balanced call.\r
+ if ( stream_.state != STREAM_CLOSED ) closeStream();\r
+}\r
+\r
+// The DirectSound default output is always the first device.\r
+unsigned int RtApiDs :: getDefaultOutputDevice( void )\r
+{\r
+ return 0;\r
+}\r
+\r
+// The DirectSound default input is always the first input device,\r
+// which is the first capture device enumerated.\r
+unsigned int RtApiDs :: getDefaultInputDevice( void )\r
+{\r
+ return 0;\r
+}\r
+\r
+unsigned int RtApiDs :: getDeviceCount( void )\r
+{\r
+ // Set query flag for previously found devices to false, so that we\r
+ // can check for any devices that have disappeared.\r
+ for ( unsigned int i=0; i<dsDevices.size(); i++ )\r
+ dsDevices[i].found = false;\r
+\r
+ // Query DirectSound devices.\r
+ bool isInput = false;\r
+ HRESULT result = DirectSoundEnumerate( (LPDSENUMCALLBACK) deviceQueryCallback, &isInput );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::getDeviceCount: error (" << getErrorString( result ) << ") enumerating output devices!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ }\r
+\r
+ // Query DirectSoundCapture devices.\r
+ isInput = true;\r
+ result = DirectSoundCaptureEnumerate( (LPDSENUMCALLBACK) deviceQueryCallback, &isInput );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::getDeviceCount: error (" << getErrorString( result ) << ") enumerating input devices!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ }\r
+\r
+ // Clean out any devices that may have disappeared.\r
+ std::vector< DsDevice > :: iterator it;\r
+ for ( it=dsDevices.begin(); it < dsDevices.end(); it++ )\r
+ if ( it->found == false ) dsDevices.erase( it );\r
+\r
+ return dsDevices.size();\r
+}\r
+\r
+RtAudio::DeviceInfo RtApiDs :: getDeviceInfo( unsigned int device )\r
+{\r
+ RtAudio::DeviceInfo info;\r
+ info.probed = false;\r
+\r
+ if ( dsDevices.size() == 0 ) {\r
+ // Force a query of all devices\r
+ getDeviceCount();\r
+ if ( dsDevices.size() == 0 ) {\r
+ errorText_ = "RtApiDs::getDeviceInfo: no devices found!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+ }\r
+\r
+ if ( device >= dsDevices.size() ) {\r
+ errorText_ = "RtApiDs::getDeviceInfo: device ID is invalid!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ HRESULT result;\r
+ if ( dsDevices[ device ].validId[0] == false ) goto probeInput;\r
+\r
+ LPDIRECTSOUND output;\r
+ DSCAPS outCaps;\r
+ result = DirectSoundCreate( dsDevices[ device ].id[0], &output, NULL );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::getDeviceInfo: error (" << getErrorString( result ) << ") opening output device (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ goto probeInput;\r
+ }\r
+\r
+ outCaps.dwSize = sizeof( outCaps );\r
+ result = output->GetCaps( &outCaps );\r
+ if ( FAILED( result ) ) {\r
+ output->Release();\r
+ errorStream_ << "RtApiDs::getDeviceInfo: error (" << getErrorString( result ) << ") getting capabilities!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ goto probeInput;\r
+ }\r
+\r
+ // Get output channel information.\r
+ info.outputChannels = ( outCaps.dwFlags & DSCAPS_PRIMARYSTEREO ) ? 2 : 1;\r
+\r
+ // Get sample rate information.\r
+ info.sampleRates.clear();\r
+ for ( unsigned int k=0; k<MAX_SAMPLE_RATES; k++ ) {\r
+ if ( SAMPLE_RATES[k] >= (unsigned int) outCaps.dwMinSecondarySampleRate &&\r
+ SAMPLE_RATES[k] <= (unsigned int) outCaps.dwMaxSecondarySampleRate )\r
+ info.sampleRates.push_back( SAMPLE_RATES[k] );\r
+ }\r
+\r
+ // Get format information.\r
+ if ( outCaps.dwFlags & DSCAPS_PRIMARY16BIT ) info.nativeFormats |= RTAUDIO_SINT16;\r
+ if ( outCaps.dwFlags & DSCAPS_PRIMARY8BIT ) info.nativeFormats |= RTAUDIO_SINT8;\r
+\r
+ output->Release();\r
+\r
+ if ( getDefaultOutputDevice() == device )\r
+ info.isDefaultOutput = true;\r
+\r
+ if ( dsDevices[ device ].validId[1] == false ) {\r
+ info.name = dsDevices[ device ].name;\r
+ info.probed = true;\r
+ return info;\r
+ }\r
+\r
+ probeInput:\r
+\r
+ LPDIRECTSOUNDCAPTURE input;\r
+ result = DirectSoundCaptureCreate( dsDevices[ device ].id[1], &input, NULL );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::getDeviceInfo: error (" << getErrorString( result ) << ") opening input device (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ DSCCAPS inCaps;\r
+ inCaps.dwSize = sizeof( inCaps );\r
+ result = input->GetCaps( &inCaps );\r
+ if ( FAILED( result ) ) {\r
+ input->Release();\r
+ errorStream_ << "RtApiDs::getDeviceInfo: error (" << getErrorString( result ) << ") getting object capabilities (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Get input channel information.\r
+ info.inputChannels = inCaps.dwChannels;\r
+\r
+ // Get sample rate and format information.\r
+ std::vector<unsigned int> rates;\r
+ if ( inCaps.dwChannels >= 2 ) {\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_1S16 ) info.nativeFormats |= RTAUDIO_SINT16;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_2S16 ) info.nativeFormats |= RTAUDIO_SINT16;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_4S16 ) info.nativeFormats |= RTAUDIO_SINT16;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_96S16 ) info.nativeFormats |= RTAUDIO_SINT16;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_1S08 ) info.nativeFormats |= RTAUDIO_SINT8;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_2S08 ) info.nativeFormats |= RTAUDIO_SINT8;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_4S08 ) info.nativeFormats |= RTAUDIO_SINT8;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_96S08 ) info.nativeFormats |= RTAUDIO_SINT8;\r
+\r
+ if ( info.nativeFormats & RTAUDIO_SINT16 ) {\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_1S16 ) rates.push_back( 11025 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_2S16 ) rates.push_back( 22050 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_4S16 ) rates.push_back( 44100 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_96S16 ) rates.push_back( 96000 );\r
+ }\r
+ else if ( info.nativeFormats & RTAUDIO_SINT8 ) {\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_1S08 ) rates.push_back( 11025 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_2S08 ) rates.push_back( 22050 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_4S08 ) rates.push_back( 44100 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_96S08 ) rates.push_back( 96000 );\r
+ }\r
+ }\r
+ else if ( inCaps.dwChannels == 1 ) {\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_1M16 ) info.nativeFormats |= RTAUDIO_SINT16;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_2M16 ) info.nativeFormats |= RTAUDIO_SINT16;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_4M16 ) info.nativeFormats |= RTAUDIO_SINT16;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_96M16 ) info.nativeFormats |= RTAUDIO_SINT16;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_1M08 ) info.nativeFormats |= RTAUDIO_SINT8;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_2M08 ) info.nativeFormats |= RTAUDIO_SINT8;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_4M08 ) info.nativeFormats |= RTAUDIO_SINT8;\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_96M08 ) info.nativeFormats |= RTAUDIO_SINT8;\r
+\r
+ if ( info.nativeFormats & RTAUDIO_SINT16 ) {\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_1M16 ) rates.push_back( 11025 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_2M16 ) rates.push_back( 22050 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_4M16 ) rates.push_back( 44100 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_96M16 ) rates.push_back( 96000 );\r
+ }\r
+ else if ( info.nativeFormats & RTAUDIO_SINT8 ) {\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_1M08 ) rates.push_back( 11025 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_2M08 ) rates.push_back( 22050 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_4M08 ) rates.push_back( 44100 );\r
+ if ( inCaps.dwFormats & WAVE_FORMAT_96M08 ) rates.push_back( 96000 );\r
+ }\r
+ }\r
+ else info.inputChannels = 0; // technically, this would be an error\r
+\r
+ input->Release();\r
+\r
+ if ( info.inputChannels == 0 ) return info;\r
+\r
+ // Copy the supported rates to the info structure but avoid duplication.\r
+ bool found;\r
+ for ( unsigned int i=0; i<rates.size(); i++ ) {\r
+ found = false;\r
+ for ( unsigned int j=0; j<info.sampleRates.size(); j++ ) {\r
+ if ( rates[i] == info.sampleRates[j] ) {\r
+ found = true;\r
+ break;\r
+ }\r
+ }\r
+ if ( found == false ) info.sampleRates.push_back( rates[i] );\r
+ }\r
+ sort( info.sampleRates.begin(), info.sampleRates.end() );\r
+\r
+ // If device opens for both playback and capture, we determine the channels.\r
+ if ( info.outputChannels > 0 && info.inputChannels > 0 )\r
+ info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;\r
+\r
+ if ( device == 0 ) info.isDefaultInput = true;\r
+\r
+ // Copy name and return.\r
+ info.name = dsDevices[ device ].name;\r
+ info.probed = true;\r
+ return info;\r
+}\r
+\r
+bool RtApiDs :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,\r
+ unsigned int firstChannel, unsigned int sampleRate,\r
+ RtAudioFormat format, unsigned int *bufferSize,\r
+ RtAudio::StreamOptions *options )\r
+{\r
+ if ( channels + firstChannel > 2 ) {\r
+ errorText_ = "RtApiDs::probeDeviceOpen: DirectSound does not support more than 2 channels per device.";\r
+ return FAILURE;\r
+ }\r
+\r
+ unsigned int nDevices = dsDevices.size();\r
+ if ( nDevices == 0 ) {\r
+ // This should not happen because a check is made before this function is called.\r
+ errorText_ = "RtApiDs::probeDeviceOpen: no devices found!";\r
+ return FAILURE;\r
+ }\r
+\r
+ if ( device >= nDevices ) {\r
+ // This should not happen because a check is made before this function is called.\r
+ errorText_ = "RtApiDs::probeDeviceOpen: device ID is invalid!";\r
+ return FAILURE;\r
+ }\r
+\r
+ if ( mode == OUTPUT ) {\r
+ if ( dsDevices[ device ].validId[0] == false ) {\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: device (" << device << ") does not support output!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+ else { // mode == INPUT\r
+ if ( dsDevices[ device ].validId[1] == false ) {\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: device (" << device << ") does not support input!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+\r
+ // According to a note in PortAudio, using GetDesktopWindow()\r
+ // instead of GetForegroundWindow() is supposed to avoid problems\r
+ // that occur when the application's window is not the foreground\r
+ // window. Also, if the application window closes before the\r
+ // DirectSound buffer, DirectSound can crash. In the past, I had\r
+ // problems when using GetDesktopWindow() but it seems fine now\r
+ // (January 2010). I'll leave it commented here.\r
+ // HWND hWnd = GetForegroundWindow();\r
+ HWND hWnd = GetDesktopWindow();\r
+\r
+ // Check the numberOfBuffers parameter and limit the lowest value to\r
+ // two. This is a judgement call and a value of two is probably too\r
+ // low for capture, but it should work for playback.\r
+ int nBuffers = 0;\r
+ if ( options ) nBuffers = options->numberOfBuffers;\r
+ if ( options && options->flags & RTAUDIO_MINIMIZE_LATENCY ) nBuffers = 2;\r
+ if ( nBuffers < 2 ) nBuffers = 3;\r
+\r
+ // Check the lower range of the user-specified buffer size and set\r
+ // (arbitrarily) to a lower bound of 32.\r
+ if ( *bufferSize < 32 ) *bufferSize = 32;\r
+\r
+ // Create the wave format structure. The data format setting will\r
+ // be determined later.\r
+ WAVEFORMATEX waveFormat;\r
+ ZeroMemory( &waveFormat, sizeof(WAVEFORMATEX) );\r
+ waveFormat.wFormatTag = WAVE_FORMAT_PCM;\r
+ waveFormat.nChannels = channels + firstChannel;\r
+ waveFormat.nSamplesPerSec = (unsigned long) sampleRate;\r
+\r
+ // Determine the device buffer size. By default, we'll use the value\r
+ // defined above (32K), but we will grow it to make allowances for\r
+ // very large software buffer sizes.\r
+ DWORD dsBufferSize = MINIMUM_DEVICE_BUFFER_SIZE;;\r
+ DWORD dsPointerLeadTime = 0;\r
+\r
+ void *ohandle = 0, *bhandle = 0;\r
+ HRESULT result;\r
+ if ( mode == OUTPUT ) {\r
+\r
+ LPDIRECTSOUND output;\r
+ result = DirectSoundCreate( dsDevices[ device ].id[0], &output, NULL );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") opening output device (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ DSCAPS outCaps;\r
+ outCaps.dwSize = sizeof( outCaps );\r
+ result = output->GetCaps( &outCaps );\r
+ if ( FAILED( result ) ) {\r
+ output->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") getting capabilities (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Check channel information.\r
+ if ( channels + firstChannel == 2 && !( outCaps.dwFlags & DSCAPS_PRIMARYSTEREO ) ) {\r
+ errorStream_ << "RtApiDs::getDeviceInfo: the output device (" << dsDevices[ device ].name << ") does not support stereo playback.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Check format information. Use 16-bit format unless not\r
+ // supported or user requests 8-bit.\r
+ if ( outCaps.dwFlags & DSCAPS_PRIMARY16BIT &&\r
+ !( format == RTAUDIO_SINT8 && outCaps.dwFlags & DSCAPS_PRIMARY8BIT ) ) {\r
+ waveFormat.wBitsPerSample = 16;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT16;\r
+ }\r
+ else {\r
+ waveFormat.wBitsPerSample = 8;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT8;\r
+ }\r
+ stream_.userFormat = format;\r
+\r
+ // Update wave format structure and buffer information.\r
+ waveFormat.nBlockAlign = waveFormat.nChannels * waveFormat.wBitsPerSample / 8;\r
+ waveFormat.nAvgBytesPerSec = waveFormat.nSamplesPerSec * waveFormat.nBlockAlign;\r
+ dsPointerLeadTime = nBuffers * (*bufferSize) * (waveFormat.wBitsPerSample / 8) * channels;\r
+\r
+ // If the user wants an even bigger buffer, increase the device buffer size accordingly.\r
+ while ( dsPointerLeadTime * 2U > dsBufferSize )\r
+ dsBufferSize *= 2;\r
+\r
+ // Set cooperative level to DSSCL_EXCLUSIVE ... sound stops when window focus changes.\r
+ // result = output->SetCooperativeLevel( hWnd, DSSCL_EXCLUSIVE );\r
+ // Set cooperative level to DSSCL_PRIORITY ... sound remains when window focus changes.\r
+ result = output->SetCooperativeLevel( hWnd, DSSCL_PRIORITY );\r
+ if ( FAILED( result ) ) {\r
+ output->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") setting cooperative level (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Even though we will write to the secondary buffer, we need to\r
+ // access the primary buffer to set the correct output format\r
+ // (since the default is 8-bit, 22 kHz!). Setup the DS primary\r
+ // buffer description.\r
+ DSBUFFERDESC bufferDescription;\r
+ ZeroMemory( &bufferDescription, sizeof( DSBUFFERDESC ) );\r
+ bufferDescription.dwSize = sizeof( DSBUFFERDESC );\r
+ bufferDescription.dwFlags = DSBCAPS_PRIMARYBUFFER;\r
+\r
+ // Obtain the primary buffer\r
+ LPDIRECTSOUNDBUFFER buffer;\r
+ result = output->CreateSoundBuffer( &bufferDescription, &buffer, NULL );\r
+ if ( FAILED( result ) ) {\r
+ output->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") accessing primary buffer (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Set the primary DS buffer sound format.\r
+ result = buffer->SetFormat( &waveFormat );\r
+ if ( FAILED( result ) ) {\r
+ output->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") setting primary buffer format (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Setup the secondary DS buffer description.\r
+ ZeroMemory( &bufferDescription, sizeof( DSBUFFERDESC ) );\r
+ bufferDescription.dwSize = sizeof( DSBUFFERDESC );\r
+ bufferDescription.dwFlags = ( DSBCAPS_STICKYFOCUS |\r
+ DSBCAPS_GLOBALFOCUS |\r
+ DSBCAPS_GETCURRENTPOSITION2 |\r
+ DSBCAPS_LOCHARDWARE ); // Force hardware mixing\r
+ bufferDescription.dwBufferBytes = dsBufferSize;\r
+ bufferDescription.lpwfxFormat = &waveFormat;\r
+\r
+ // Try to create the secondary DS buffer. If that doesn't work,\r
+ // try to use software mixing. Otherwise, there's a problem.\r
+ result = output->CreateSoundBuffer( &bufferDescription, &buffer, NULL );\r
+ if ( FAILED( result ) ) {\r
+ bufferDescription.dwFlags = ( DSBCAPS_STICKYFOCUS |\r
+ DSBCAPS_GLOBALFOCUS |\r
+ DSBCAPS_GETCURRENTPOSITION2 |\r
+ DSBCAPS_LOCSOFTWARE ); // Force software mixing\r
+ result = output->CreateSoundBuffer( &bufferDescription, &buffer, NULL );\r
+ if ( FAILED( result ) ) {\r
+ output->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") creating secondary buffer (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+\r
+ // Get the buffer size ... might be different from what we specified.\r
+ DSBCAPS dsbcaps;\r
+ dsbcaps.dwSize = sizeof( DSBCAPS );\r
+ result = buffer->GetCaps( &dsbcaps );\r
+ if ( FAILED( result ) ) {\r
+ output->Release();\r
+ buffer->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") getting buffer settings (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ dsBufferSize = dsbcaps.dwBufferBytes;\r
+\r
+ // Lock the DS buffer\r
+ LPVOID audioPtr;\r
+ DWORD dataLen;\r
+ result = buffer->Lock( 0, dsBufferSize, &audioPtr, &dataLen, NULL, NULL, 0 );\r
+ if ( FAILED( result ) ) {\r
+ output->Release();\r
+ buffer->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") locking buffer (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Zero the DS buffer\r
+ ZeroMemory( audioPtr, dataLen );\r
+\r
+ // Unlock the DS buffer\r
+ result = buffer->Unlock( audioPtr, dataLen, NULL, 0 );\r
+ if ( FAILED( result ) ) {\r
+ output->Release();\r
+ buffer->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") unlocking buffer (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ ohandle = (void *) output;\r
+ bhandle = (void *) buffer;\r
+ }\r
+\r
+ if ( mode == INPUT ) {\r
+\r
+ LPDIRECTSOUNDCAPTURE input;\r
+ result = DirectSoundCaptureCreate( dsDevices[ device ].id[1], &input, NULL );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") opening input device (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ DSCCAPS inCaps;\r
+ inCaps.dwSize = sizeof( inCaps );\r
+ result = input->GetCaps( &inCaps );\r
+ if ( FAILED( result ) ) {\r
+ input->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") getting input capabilities (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Check channel information.\r
+ if ( inCaps.dwChannels < channels + firstChannel ) {\r
+ errorText_ = "RtApiDs::getDeviceInfo: the input device does not support requested input channels.";\r
+ return FAILURE;\r
+ }\r
+\r
+ // Check format information. Use 16-bit format unless user\r
+ // requests 8-bit.\r
+ DWORD deviceFormats;\r
+ if ( channels + firstChannel == 2 ) {\r
+ deviceFormats = WAVE_FORMAT_1S08 | WAVE_FORMAT_2S08 | WAVE_FORMAT_4S08 | WAVE_FORMAT_96S08;\r
+ if ( format == RTAUDIO_SINT8 && inCaps.dwFormats & deviceFormats ) {\r
+ waveFormat.wBitsPerSample = 8;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT8;\r
+ }\r
+ else { // assume 16-bit is supported\r
+ waveFormat.wBitsPerSample = 16;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT16;\r
+ }\r
+ }\r
+ else { // channel == 1\r
+ deviceFormats = WAVE_FORMAT_1M08 | WAVE_FORMAT_2M08 | WAVE_FORMAT_4M08 | WAVE_FORMAT_96M08;\r
+ if ( format == RTAUDIO_SINT8 && inCaps.dwFormats & deviceFormats ) {\r
+ waveFormat.wBitsPerSample = 8;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT8;\r
+ }\r
+ else { // assume 16-bit is supported\r
+ waveFormat.wBitsPerSample = 16;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT16;\r
+ }\r
+ }\r
+ stream_.userFormat = format;\r
+\r
+ // Update wave format structure and buffer information.\r
+ waveFormat.nBlockAlign = waveFormat.nChannels * waveFormat.wBitsPerSample / 8;\r
+ waveFormat.nAvgBytesPerSec = waveFormat.nSamplesPerSec * waveFormat.nBlockAlign;\r
+ dsPointerLeadTime = nBuffers * (*bufferSize) * (waveFormat.wBitsPerSample / 8) * channels;\r
+\r
+ // If the user wants an even bigger buffer, increase the device buffer size accordingly.\r
+ while ( dsPointerLeadTime * 2U > dsBufferSize )\r
+ dsBufferSize *= 2;\r
+\r
+ // Setup the secondary DS buffer description.\r
+ DSCBUFFERDESC bufferDescription;\r
+ ZeroMemory( &bufferDescription, sizeof( DSCBUFFERDESC ) );\r
+ bufferDescription.dwSize = sizeof( DSCBUFFERDESC );\r
+ bufferDescription.dwFlags = 0;\r
+ bufferDescription.dwReserved = 0;\r
+ bufferDescription.dwBufferBytes = dsBufferSize;\r
+ bufferDescription.lpwfxFormat = &waveFormat;\r
+\r
+ // Create the capture buffer.\r
+ LPDIRECTSOUNDCAPTUREBUFFER buffer;\r
+ result = input->CreateCaptureBuffer( &bufferDescription, &buffer, NULL );\r
+ if ( FAILED( result ) ) {\r
+ input->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") creating input buffer (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Get the buffer size ... might be different from what we specified.\r
+ DSCBCAPS dscbcaps;\r
+ dscbcaps.dwSize = sizeof( DSCBCAPS );\r
+ result = buffer->GetCaps( &dscbcaps );\r
+ if ( FAILED( result ) ) {\r
+ input->Release();\r
+ buffer->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") getting buffer settings (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ dsBufferSize = dscbcaps.dwBufferBytes;\r
+\r
+ // NOTE: We could have a problem here if this is a duplex stream\r
+ // and the play and capture hardware buffer sizes are different\r
+ // (I'm actually not sure if that is a problem or not).\r
+ // Currently, we are not verifying that.\r
+\r
+ // Lock the capture buffer\r
+ LPVOID audioPtr;\r
+ DWORD dataLen;\r
+ result = buffer->Lock( 0, dsBufferSize, &audioPtr, &dataLen, NULL, NULL, 0 );\r
+ if ( FAILED( result ) ) {\r
+ input->Release();\r
+ buffer->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") locking input buffer (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Zero the buffer\r
+ ZeroMemory( audioPtr, dataLen );\r
+\r
+ // Unlock the buffer\r
+ result = buffer->Unlock( audioPtr, dataLen, NULL, 0 );\r
+ if ( FAILED( result ) ) {\r
+ input->Release();\r
+ buffer->Release();\r
+ errorStream_ << "RtApiDs::probeDeviceOpen: error (" << getErrorString( result ) << ") unlocking input buffer (" << dsDevices[ device ].name << ")!";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ ohandle = (void *) input;\r
+ bhandle = (void *) buffer;\r
+ }\r
+\r
+ // Set various stream parameters\r
+ DsHandle *handle = 0;\r
+ stream_.nDeviceChannels[mode] = channels + firstChannel;\r
+ stream_.nUserChannels[mode] = channels;\r
+ stream_.bufferSize = *bufferSize;\r
+ stream_.channelOffset[mode] = firstChannel;\r
+ stream_.deviceInterleaved[mode] = true;\r
+ if ( options && options->flags & RTAUDIO_NONINTERLEAVED ) stream_.userInterleaved = false;\r
+ else stream_.userInterleaved = true;\r
+\r
+ // Set flag for buffer conversion\r
+ stream_.doConvertBuffer[mode] = false;\r
+ if (stream_.nUserChannels[mode] != stream_.nDeviceChannels[mode])\r
+ stream_.doConvertBuffer[mode] = true;\r
+ if (stream_.userFormat != stream_.deviceFormat[mode])\r
+ stream_.doConvertBuffer[mode] = true;\r
+ if ( stream_.userInterleaved != stream_.deviceInterleaved[mode] &&\r
+ stream_.nUserChannels[mode] > 1 )\r
+ stream_.doConvertBuffer[mode] = true;\r
+\r
+ // Allocate necessary internal buffers\r
+ long bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );\r
+ stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.userBuffer[mode] == NULL ) {\r
+ errorText_ = "RtApiDs::probeDeviceOpen: error allocating user buffer memory.";\r
+ goto error;\r
+ }\r
+\r
+ if ( stream_.doConvertBuffer[mode] ) {\r
+\r
+ bool makeBuffer = true;\r
+ bufferBytes = stream_.nDeviceChannels[mode] * formatBytes( stream_.deviceFormat[mode] );\r
+ if ( mode == INPUT ) {\r
+ if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {\r
+ unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );\r
+ if ( bufferBytes <= (long) bytesOut ) makeBuffer = false;\r
+ }\r
+ }\r
+\r
+ if ( makeBuffer ) {\r
+ bufferBytes *= *bufferSize;\r
+ if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.deviceBuffer == NULL ) {\r
+ errorText_ = "RtApiDs::probeDeviceOpen: error allocating device buffer memory.";\r
+ goto error;\r
+ }\r
+ }\r
+ }\r
+\r
+ // Allocate our DsHandle structures for the stream.\r
+ if ( stream_.apiHandle == 0 ) {\r
+ try {\r
+ handle = new DsHandle;\r
+ }\r
+ catch ( std::bad_alloc& ) {\r
+ errorText_ = "RtApiDs::probeDeviceOpen: error allocating AsioHandle memory.";\r
+ goto error;\r
+ }\r
+\r
+ // Create a manual-reset event.\r
+ handle->condition = CreateEvent( NULL, // no security\r
+ TRUE, // manual-reset\r
+ FALSE, // non-signaled initially\r
+ NULL ); // unnamed\r
+ stream_.apiHandle = (void *) handle;\r
+ }\r
+ else\r
+ handle = (DsHandle *) stream_.apiHandle;\r
+ handle->id[mode] = ohandle;\r
+ handle->buffer[mode] = bhandle;\r
+ handle->dsBufferSize[mode] = dsBufferSize;\r
+ handle->dsPointerLeadTime[mode] = dsPointerLeadTime;\r
+\r
+ stream_.device[mode] = device;\r
+ stream_.state = STREAM_STOPPED;\r
+ if ( stream_.mode == OUTPUT && mode == INPUT )\r
+ // We had already set up an output stream.\r
+ stream_.mode = DUPLEX;\r
+ else\r
+ stream_.mode = mode;\r
+ stream_.nBuffers = nBuffers;\r
+ stream_.sampleRate = sampleRate;\r
+\r
+ // Setup the buffer conversion information structure.\r
+ if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, firstChannel );\r
+\r
+ // Setup the callback thread.\r
+ if ( stream_.callbackInfo.isRunning == false ) {\r
+ unsigned threadId;\r
+ stream_.callbackInfo.isRunning = true;\r
+ stream_.callbackInfo.object = (void *) this;\r
+ stream_.callbackInfo.thread = _beginthreadex( NULL, 0, &callbackHandler,\r
+ &stream_.callbackInfo, 0, &threadId );\r
+ if ( stream_.callbackInfo.thread == 0 ) {\r
+ errorText_ = "RtApiDs::probeDeviceOpen: error creating callback thread!";\r
+ goto error;\r
+ }\r
+\r
+ // Boost DS thread priority\r
+ SetThreadPriority( (HANDLE) stream_.callbackInfo.thread, THREAD_PRIORITY_HIGHEST );\r
+ }\r
+ return SUCCESS;\r
+\r
+ error:\r
+ if ( handle ) {\r
+ if ( handle->buffer[0] ) { // the object pointer can be NULL and valid\r
+ LPDIRECTSOUND object = (LPDIRECTSOUND) handle->id[0];\r
+ LPDIRECTSOUNDBUFFER buffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];\r
+ if ( buffer ) buffer->Release();\r
+ object->Release();\r
+ }\r
+ if ( handle->buffer[1] ) {\r
+ LPDIRECTSOUNDCAPTURE object = (LPDIRECTSOUNDCAPTURE) handle->id[1];\r
+ LPDIRECTSOUNDCAPTUREBUFFER buffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];\r
+ if ( buffer ) buffer->Release();\r
+ object->Release();\r
+ }\r
+ CloseHandle( handle->condition );\r
+ delete handle;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ return FAILURE;\r
+}\r
+\r
+void RtApiDs :: closeStream()\r
+{\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiDs::closeStream(): no open stream to close!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ // Stop the callback thread.\r
+ stream_.callbackInfo.isRunning = false;\r
+ WaitForSingleObject( (HANDLE) stream_.callbackInfo.thread, INFINITE );\r
+ CloseHandle( (HANDLE) stream_.callbackInfo.thread );\r
+\r
+ DsHandle *handle = (DsHandle *) stream_.apiHandle;\r
+ if ( handle ) {\r
+ if ( handle->buffer[0] ) { // the object pointer can be NULL and valid\r
+ LPDIRECTSOUND object = (LPDIRECTSOUND) handle->id[0];\r
+ LPDIRECTSOUNDBUFFER buffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];\r
+ if ( buffer ) {\r
+ buffer->Stop();\r
+ buffer->Release();\r
+ }\r
+ object->Release();\r
+ }\r
+ if ( handle->buffer[1] ) {\r
+ LPDIRECTSOUNDCAPTURE object = (LPDIRECTSOUNDCAPTURE) handle->id[1];\r
+ LPDIRECTSOUNDCAPTUREBUFFER buffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];\r
+ if ( buffer ) {\r
+ buffer->Stop();\r
+ buffer->Release();\r
+ }\r
+ object->Release();\r
+ }\r
+ CloseHandle( handle->condition );\r
+ delete handle;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ stream_.mode = UNINITIALIZED;\r
+ stream_.state = STREAM_CLOSED;\r
+}\r
+\r
+void RtApiDs :: startStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_RUNNING ) {\r
+ errorText_ = "RtApiDs::startStream(): the stream is already running!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ //MUTEX_LOCK( &stream_.mutex );\r
+ \r
+ DsHandle *handle = (DsHandle *) stream_.apiHandle;\r
+\r
+ // Increase scheduler frequency on lesser windows (a side-effect of\r
+ // increasing timer accuracy). On greater windows (Win2K or later),\r
+ // this is already in effect.\r
+ timeBeginPeriod( 1 ); \r
+\r
+ buffersRolling = false;\r
+ duplexPrerollBytes = 0;\r
+\r
+ if ( stream_.mode == DUPLEX ) {\r
+ // 0.5 seconds of silence in DUPLEX mode while the devices spin up and synchronize.\r
+ duplexPrerollBytes = (int) ( 0.5 * stream_.sampleRate * formatBytes( stream_.deviceFormat[1] ) * stream_.nDeviceChannels[1] );\r
+ }\r
+\r
+ HRESULT result = 0;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+\r
+ LPDIRECTSOUNDBUFFER buffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];\r
+ result = buffer->Play( 0, 0, DSBPLAY_LOOPING );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::startStream: error (" << getErrorString( result ) << ") starting output buffer!";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {\r
+\r
+ LPDIRECTSOUNDCAPTUREBUFFER buffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];\r
+ result = buffer->Start( DSCBSTART_LOOPING );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::startStream: error (" << getErrorString( result ) << ") starting input buffer!";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ handle->drainCounter = 0;\r
+ handle->internalDrain = false;\r
+ ResetEvent( handle->condition );\r
+ stream_.state = STREAM_RUNNING;\r
+\r
+ unlock:\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ if ( FAILED( result ) ) error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiDs :: stopStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiDs::stopStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ /*\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return;\r
+ }\r
+ */\r
+\r
+ HRESULT result = 0;\r
+ LPVOID audioPtr;\r
+ DWORD dataLen;\r
+ DsHandle *handle = (DsHandle *) stream_.apiHandle;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+ if ( handle->drainCounter == 0 ) {\r
+ handle->drainCounter = 2;\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+ WaitForSingleObject( handle->condition, INFINITE ); // block until signaled\r
+ //ResetEvent( handle->condition );\r
+ // MUTEX_LOCK( &stream_.mutex );\r
+ }\r
+\r
+ stream_.state = STREAM_STOPPED;\r
+\r
+ // Stop the buffer and clear memory\r
+ LPDIRECTSOUNDBUFFER buffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];\r
+ result = buffer->Stop();\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") stopping output buffer!";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+\r
+ // Lock the buffer and clear it so that if we start to play again,\r
+ // we won't have old data playing.\r
+ result = buffer->Lock( 0, handle->dsBufferSize[0], &audioPtr, &dataLen, NULL, NULL, 0 );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") locking output buffer!";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+\r
+ // Zero the DS buffer\r
+ ZeroMemory( audioPtr, dataLen );\r
+\r
+ // Unlock the DS buffer\r
+ result = buffer->Unlock( audioPtr, dataLen, NULL, 0 );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") unlocking output buffer!";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+\r
+ // If we start playing again, we must begin at beginning of buffer.\r
+ handle->bufferPointer[0] = 0;\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {\r
+ LPDIRECTSOUNDCAPTUREBUFFER buffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];\r
+ audioPtr = NULL;\r
+ dataLen = 0;\r
+\r
+ stream_.state = STREAM_STOPPED;\r
+\r
+ result = buffer->Stop();\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") stopping input buffer!";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+\r
+ // Lock the buffer and clear it so that if we start to play again,\r
+ // we won't have old data playing.\r
+ result = buffer->Lock( 0, handle->dsBufferSize[1], &audioPtr, &dataLen, NULL, NULL, 0 );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") locking input buffer!";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+\r
+ // Zero the DS buffer\r
+ ZeroMemory( audioPtr, dataLen );\r
+\r
+ // Unlock the DS buffer\r
+ result = buffer->Unlock( audioPtr, dataLen, NULL, 0 );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::stopStream: error (" << getErrorString( result ) << ") unlocking input buffer!";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+\r
+ // If we start recording again, we must begin at beginning of buffer.\r
+ handle->bufferPointer[1] = 0;\r
+ }\r
+\r
+ unlock:\r
+ timeEndPeriod( 1 ); // revert to normal scheduler frequency on lesser windows.\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ if ( FAILED( result ) ) error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiDs :: abortStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiDs::abortStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ DsHandle *handle = (DsHandle *) stream_.apiHandle;\r
+ handle->drainCounter = 2;\r
+\r
+ stopStream();\r
+}\r
+\r
+void RtApiDs :: callbackEvent()\r
+{\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ Sleep( 50 ); // sleep 50 milliseconds\r
+ return;\r
+ }\r
+\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiDs::callbackEvent(): the stream is closed ... this shouldn't happen!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ CallbackInfo *info = (CallbackInfo *) &stream_.callbackInfo;\r
+ DsHandle *handle = (DsHandle *) stream_.apiHandle;\r
+\r
+ // Check if we were draining the stream and signal is finished.\r
+ if ( handle->drainCounter > stream_.nBuffers + 2 ) {\r
+ if ( handle->internalDrain == false )\r
+ SetEvent( handle->condition );\r
+ else\r
+ stopStream();\r
+ return;\r
+ }\r
+\r
+ /*\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ // The state might change while waiting on a mutex.\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return;\r
+ }\r
+ */\r
+\r
+ // Invoke user callback to get fresh output data UNLESS we are\r
+ // draining stream.\r
+ if ( handle->drainCounter == 0 ) {\r
+ RtAudioCallback callback = (RtAudioCallback) info->callback;\r
+ double streamTime = getStreamTime();\r
+ RtAudioStreamStatus status = 0;\r
+ if ( stream_.mode != INPUT && handle->xrun[0] == true ) {\r
+ status |= RTAUDIO_OUTPUT_UNDERFLOW;\r
+ handle->xrun[0] = false;\r
+ }\r
+ if ( stream_.mode != OUTPUT && handle->xrun[1] == true ) {\r
+ status |= RTAUDIO_INPUT_OVERFLOW;\r
+ handle->xrun[1] = false;\r
+ }\r
+ handle->drainCounter = callback( stream_.userBuffer[0], stream_.userBuffer[1],\r
+ stream_.bufferSize, streamTime, status, info->userData );\r
+ if ( handle->drainCounter == 2 ) {\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+ abortStream();\r
+ return;\r
+ }\r
+ else if ( handle->drainCounter == 1 )\r
+ handle->internalDrain = true;\r
+ }\r
+\r
+ HRESULT result;\r
+ DWORD currentWritePointer, safeWritePointer;\r
+ DWORD currentReadPointer, safeReadPointer;\r
+ UINT nextWritePointer;\r
+\r
+ LPVOID buffer1 = NULL;\r
+ LPVOID buffer2 = NULL;\r
+ DWORD bufferSize1 = 0;\r
+ DWORD bufferSize2 = 0;\r
+\r
+ char *buffer;\r
+ long bufferBytes;\r
+\r
+ if ( buffersRolling == false ) {\r
+ if ( stream_.mode == DUPLEX ) {\r
+ //assert( handle->dsBufferSize[0] == handle->dsBufferSize[1] );\r
+\r
+ // It takes a while for the devices to get rolling. As a result,\r
+ // there's no guarantee that the capture and write device pointers\r
+ // will move in lockstep. Wait here for both devices to start\r
+ // rolling, and then set our buffer pointers accordingly.\r
+ // e.g. Crystal Drivers: the capture buffer starts up 5700 to 9600\r
+ // bytes later than the write buffer.\r
+\r
+ // Stub: a serious risk of having a pre-emptive scheduling round\r
+ // take place between the two GetCurrentPosition calls... but I'm\r
+ // really not sure how to solve the problem. Temporarily boost to\r
+ // Realtime priority, maybe; but I'm not sure what priority the\r
+ // DirectSound service threads run at. We *should* be roughly\r
+ // within a ms or so of correct.\r
+\r
+ LPDIRECTSOUNDBUFFER dsWriteBuffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];\r
+ LPDIRECTSOUNDCAPTUREBUFFER dsCaptureBuffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];\r
+\r
+ DWORD startSafeWritePointer, startSafeReadPointer;\r
+\r
+ result = dsWriteBuffer->GetCurrentPosition( NULL, &startSafeWritePointer );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current write position!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+ result = dsCaptureBuffer->GetCurrentPosition( NULL, &startSafeReadPointer );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current read position!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+ while ( true ) {\r
+ result = dsWriteBuffer->GetCurrentPosition( NULL, &safeWritePointer );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current write position!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+ result = dsCaptureBuffer->GetCurrentPosition( NULL, &safeReadPointer );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current read position!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+ if ( safeWritePointer != startSafeWritePointer && safeReadPointer != startSafeReadPointer ) break;\r
+ Sleep( 1 );\r
+ }\r
+\r
+ //assert( handle->dsBufferSize[0] == handle->dsBufferSize[1] );\r
+\r
+ handle->bufferPointer[0] = safeWritePointer + handle->dsPointerLeadTime[0];\r
+ if ( handle->bufferPointer[0] >= handle->dsBufferSize[0] ) handle->bufferPointer[0] -= handle->dsBufferSize[0];\r
+ handle->bufferPointer[1] = safeReadPointer;\r
+ }\r
+ else if ( stream_.mode == OUTPUT ) {\r
+\r
+ // Set the proper nextWritePosition after initial startup.\r
+ LPDIRECTSOUNDBUFFER dsWriteBuffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];\r
+ result = dsWriteBuffer->GetCurrentPosition( ¤tWritePointer, &safeWritePointer );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current write position!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+ handle->bufferPointer[0] = safeWritePointer + handle->dsPointerLeadTime[0];\r
+ if ( handle->bufferPointer[0] >= handle->dsBufferSize[0] ) handle->bufferPointer[0] -= handle->dsBufferSize[0];\r
+ }\r
+\r
+ buffersRolling = true;\r
+ }\r
+\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+ \r
+ LPDIRECTSOUNDBUFFER dsBuffer = (LPDIRECTSOUNDBUFFER) handle->buffer[0];\r
+\r
+ if ( handle->drainCounter > 1 ) { // write zeros to the output stream\r
+ bufferBytes = stream_.bufferSize * stream_.nUserChannels[0];\r
+ bufferBytes *= formatBytes( stream_.userFormat );\r
+ memset( stream_.userBuffer[0], 0, bufferBytes );\r
+ }\r
+\r
+ // Setup parameters and do buffer conversion if necessary.\r
+ if ( stream_.doConvertBuffer[0] ) {\r
+ buffer = stream_.deviceBuffer;\r
+ convertBuffer( buffer, stream_.userBuffer[0], stream_.convertInfo[0] );\r
+ bufferBytes = stream_.bufferSize * stream_.nDeviceChannels[0];\r
+ bufferBytes *= formatBytes( stream_.deviceFormat[0] );\r
+ }\r
+ else {\r
+ buffer = stream_.userBuffer[0];\r
+ bufferBytes = stream_.bufferSize * stream_.nUserChannels[0];\r
+ bufferBytes *= formatBytes( stream_.userFormat );\r
+ }\r
+\r
+ // No byte swapping necessary in DirectSound implementation.\r
+\r
+ // Ahhh ... windoze. 16-bit data is signed but 8-bit data is\r
+ // unsigned. So, we need to convert our signed 8-bit data here to\r
+ // unsigned.\r
+ if ( stream_.deviceFormat[0] == RTAUDIO_SINT8 )\r
+ for ( int i=0; i<bufferBytes; i++ ) buffer[i] = (unsigned char) ( buffer[i] + 128 );\r
+\r
+ DWORD dsBufferSize = handle->dsBufferSize[0];\r
+ nextWritePointer = handle->bufferPointer[0];\r
+\r
+ DWORD endWrite, leadPointer;\r
+ while ( true ) {\r
+ // Find out where the read and "safe write" pointers are.\r
+ result = dsBuffer->GetCurrentPosition( ¤tWritePointer, &safeWritePointer );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current write position!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+\r
+ // We will copy our output buffer into the region between\r
+ // safeWritePointer and leadPointer. If leadPointer is not\r
+ // beyond the next endWrite position, wait until it is.\r
+ leadPointer = safeWritePointer + handle->dsPointerLeadTime[0];\r
+ //std::cout << "safeWritePointer = " << safeWritePointer << ", leadPointer = " << leadPointer << ", nextWritePointer = " << nextWritePointer << std::endl;\r
+ if ( leadPointer > dsBufferSize ) leadPointer -= dsBufferSize;\r
+ if ( leadPointer < nextWritePointer ) leadPointer += dsBufferSize; // unwrap offset\r
+ endWrite = nextWritePointer + bufferBytes;\r
+\r
+ // Check whether the entire write region is behind the play pointer.\r
+ if ( leadPointer >= endWrite ) break;\r
+\r
+ // If we are here, then we must wait until the leadPointer advances\r
+ // beyond the end of our next write region. We use the\r
+ // Sleep() function to suspend operation until that happens.\r
+ double millis = ( endWrite - leadPointer ) * 1000.0;\r
+ millis /= ( formatBytes( stream_.deviceFormat[0]) * stream_.nDeviceChannels[0] * stream_.sampleRate);\r
+ if ( millis < 1.0 ) millis = 1.0;\r
+ Sleep( (DWORD) millis );\r
+ }\r
+\r
+ if ( dsPointerBetween( nextWritePointer, safeWritePointer, currentWritePointer, dsBufferSize )\r
+ || dsPointerBetween( endWrite, safeWritePointer, currentWritePointer, dsBufferSize ) ) { \r
+ // We've strayed into the forbidden zone ... resync the read pointer.\r
+ handle->xrun[0] = true;\r
+ nextWritePointer = safeWritePointer + handle->dsPointerLeadTime[0] - bufferBytes;\r
+ if ( nextWritePointer >= dsBufferSize ) nextWritePointer -= dsBufferSize;\r
+ handle->bufferPointer[0] = nextWritePointer;\r
+ endWrite = nextWritePointer + bufferBytes;\r
+ }\r
+\r
+ // Lock free space in the buffer\r
+ result = dsBuffer->Lock( nextWritePointer, bufferBytes, &buffer1,\r
+ &bufferSize1, &buffer2, &bufferSize2, 0 );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") locking buffer during playback!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+\r
+ // Copy our buffer into the DS buffer\r
+ CopyMemory( buffer1, buffer, bufferSize1 );\r
+ if ( buffer2 != NULL ) CopyMemory( buffer2, buffer+bufferSize1, bufferSize2 );\r
+\r
+ // Update our buffer offset and unlock sound buffer\r
+ dsBuffer->Unlock( buffer1, bufferSize1, buffer2, bufferSize2 );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") unlocking buffer during playback!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+ nextWritePointer = ( nextWritePointer + bufferSize1 + bufferSize2 ) % dsBufferSize;\r
+ handle->bufferPointer[0] = nextWritePointer;\r
+\r
+ if ( handle->drainCounter ) {\r
+ handle->drainCounter++;\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {\r
+\r
+ // Setup parameters.\r
+ if ( stream_.doConvertBuffer[1] ) {\r
+ buffer = stream_.deviceBuffer;\r
+ bufferBytes = stream_.bufferSize * stream_.nDeviceChannels[1];\r
+ bufferBytes *= formatBytes( stream_.deviceFormat[1] );\r
+ }\r
+ else {\r
+ buffer = stream_.userBuffer[1];\r
+ bufferBytes = stream_.bufferSize * stream_.nUserChannels[1];\r
+ bufferBytes *= formatBytes( stream_.userFormat );\r
+ }\r
+\r
+ LPDIRECTSOUNDCAPTUREBUFFER dsBuffer = (LPDIRECTSOUNDCAPTUREBUFFER) handle->buffer[1];\r
+ long nextReadPointer = handle->bufferPointer[1];\r
+ DWORD dsBufferSize = handle->dsBufferSize[1];\r
+\r
+ // Find out where the write and "safe read" pointers are.\r
+ result = dsBuffer->GetCurrentPosition( ¤tReadPointer, &safeReadPointer );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current read position!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+\r
+ if ( safeReadPointer < (DWORD)nextReadPointer ) safeReadPointer += dsBufferSize; // unwrap offset\r
+ DWORD endRead = nextReadPointer + bufferBytes;\r
+\r
+ // Handling depends on whether we are INPUT or DUPLEX. \r
+ // If we're in INPUT mode then waiting is a good thing. If we're in DUPLEX mode,\r
+ // then a wait here will drag the write pointers into the forbidden zone.\r
+ // \r
+ // In DUPLEX mode, rather than wait, we will back off the read pointer until \r
+ // it's in a safe position. This causes dropouts, but it seems to be the only \r
+ // practical way to sync up the read and write pointers reliably, given the \r
+ // the very complex relationship between phase and increment of the read and write \r
+ // pointers.\r
+ //\r
+ // In order to minimize audible dropouts in DUPLEX mode, we will\r
+ // provide a pre-roll period of 0.5 seconds in which we return\r
+ // zeros from the read buffer while the pointers sync up.\r
+\r
+ if ( stream_.mode == DUPLEX ) {\r
+ if ( safeReadPointer < endRead ) {\r
+ if ( duplexPrerollBytes <= 0 ) {\r
+ // Pre-roll time over. Be more agressive.\r
+ int adjustment = endRead-safeReadPointer;\r
+\r
+ handle->xrun[1] = true;\r
+ // Two cases:\r
+ // - large adjustments: we've probably run out of CPU cycles, so just resync exactly,\r
+ // and perform fine adjustments later.\r
+ // - small adjustments: back off by twice as much.\r
+ if ( adjustment >= 2*bufferBytes )\r
+ nextReadPointer = safeReadPointer-2*bufferBytes;\r
+ else\r
+ nextReadPointer = safeReadPointer-bufferBytes-adjustment;\r
+\r
+ if ( nextReadPointer < 0 ) nextReadPointer += dsBufferSize;\r
+\r
+ }\r
+ else {\r
+ // In pre=roll time. Just do it.\r
+ nextReadPointer = safeReadPointer - bufferBytes;\r
+ while ( nextReadPointer < 0 ) nextReadPointer += dsBufferSize;\r
+ }\r
+ endRead = nextReadPointer + bufferBytes;\r
+ }\r
+ }\r
+ else { // mode == INPUT\r
+ while ( safeReadPointer < endRead ) {\r
+ // See comments for playback.\r
+ double millis = (endRead - safeReadPointer) * 1000.0;\r
+ millis /= ( formatBytes(stream_.deviceFormat[1]) * stream_.nDeviceChannels[1] * stream_.sampleRate);\r
+ if ( millis < 1.0 ) millis = 1.0;\r
+ Sleep( (DWORD) millis );\r
+\r
+ // Wake up and find out where we are now.\r
+ result = dsBuffer->GetCurrentPosition( ¤tReadPointer, &safeReadPointer );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") getting current read position!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+ \r
+ if ( safeReadPointer < (DWORD)nextReadPointer ) safeReadPointer += dsBufferSize; // unwrap offset\r
+ }\r
+ }\r
+\r
+ // Lock free space in the buffer\r
+ result = dsBuffer->Lock( nextReadPointer, bufferBytes, &buffer1,\r
+ &bufferSize1, &buffer2, &bufferSize2, 0 );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") locking capture buffer!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+\r
+ if ( duplexPrerollBytes <= 0 ) {\r
+ // Copy our buffer into the DS buffer\r
+ CopyMemory( buffer, buffer1, bufferSize1 );\r
+ if ( buffer2 != NULL ) CopyMemory( buffer+bufferSize1, buffer2, bufferSize2 );\r
+ }\r
+ else {\r
+ memset( buffer, 0, bufferSize1 );\r
+ if ( buffer2 != NULL ) memset( buffer + bufferSize1, 0, bufferSize2 );\r
+ duplexPrerollBytes -= bufferSize1 + bufferSize2;\r
+ }\r
+\r
+ // Update our buffer offset and unlock sound buffer\r
+ nextReadPointer = ( nextReadPointer + bufferSize1 + bufferSize2 ) % dsBufferSize;\r
+ dsBuffer->Unlock( buffer1, bufferSize1, buffer2, bufferSize2 );\r
+ if ( FAILED( result ) ) {\r
+ errorStream_ << "RtApiDs::callbackEvent: error (" << getErrorString( result ) << ") unlocking capture buffer!";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::SYSTEM_ERROR );\r
+ }\r
+ handle->bufferPointer[1] = nextReadPointer;\r
+\r
+ // No byte swapping necessary in DirectSound implementation.\r
+\r
+ // If necessary, convert 8-bit data from unsigned to signed.\r
+ if ( stream_.deviceFormat[1] == RTAUDIO_SINT8 )\r
+ for ( int j=0; j<bufferBytes; j++ ) buffer[j] = (signed char) ( buffer[j] - 128 );\r
+\r
+ // Do buffer conversion if necessary.\r
+ if ( stream_.doConvertBuffer[1] )\r
+ convertBuffer( stream_.userBuffer[1], stream_.deviceBuffer, stream_.convertInfo[1] );\r
+ }\r
+\r
+ unlock:\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ RtApi::tickStreamTime();\r
+}\r
+\r
+// Definitions for utility functions and callbacks\r
+// specific to the DirectSound implementation.\r
+\r
+extern "C" unsigned __stdcall callbackHandler( void *ptr )\r
+{\r
+ CallbackInfo *info = (CallbackInfo *) ptr;\r
+ RtApiDs *object = (RtApiDs *) info->object;\r
+ bool* isRunning = &info->isRunning;\r
+\r
+ while ( *isRunning == true ) {\r
+ object->callbackEvent();\r
+ }\r
+\r
+ _endthreadex( 0 );\r
+ return 0;\r
+}\r
+\r
+#include "tchar.h"\r
+\r
+std::string convertTChar( LPCTSTR name )\r
+{\r
+ std::string s;\r
+\r
+#if defined( UNICODE ) || defined( _UNICODE )\r
+ // Yes, this conversion doesn't make sense for two-byte characters\r
+ // but RtAudio is currently written to return an std::string of\r
+ // one-byte chars for the device name.\r
+ for ( unsigned int i=0; i<wcslen( name ); i++ )\r
+ s.push_back( name[i] );\r
+#else\r
+ s.append( std::string( name ) );\r
+#endif\r
+\r
+ return s;\r
+}\r
+\r
+static BOOL CALLBACK deviceQueryCallback( LPGUID lpguid,\r
+ LPCTSTR description,\r
+ LPCTSTR module,\r
+ LPVOID lpContext )\r
+{\r
+ bool *isInput = (bool *) lpContext;\r
+\r
+ HRESULT hr;\r
+ bool validDevice = false;\r
+ if ( *isInput == true ) {\r
+ DSCCAPS caps;\r
+ LPDIRECTSOUNDCAPTURE object;\r
+\r
+ hr = DirectSoundCaptureCreate( lpguid, &object, NULL );\r
+ if ( hr != DS_OK ) return TRUE;\r
+\r
+ caps.dwSize = sizeof(caps);\r
+ hr = object->GetCaps( &caps );\r
+ if ( hr == DS_OK ) {\r
+ if ( caps.dwChannels > 0 && caps.dwFormats > 0 )\r
+ validDevice = true;\r
+ }\r
+ object->Release();\r
+ }\r
+ else {\r
+ DSCAPS caps;\r
+ LPDIRECTSOUND object;\r
+ hr = DirectSoundCreate( lpguid, &object, NULL );\r
+ if ( hr != DS_OK ) return TRUE;\r
+\r
+ caps.dwSize = sizeof(caps);\r
+ hr = object->GetCaps( &caps );\r
+ if ( hr == DS_OK ) {\r
+ if ( caps.dwFlags & DSCAPS_PRIMARYMONO || caps.dwFlags & DSCAPS_PRIMARYSTEREO )\r
+ validDevice = true;\r
+ }\r
+ object->Release();\r
+ }\r
+\r
+ // If good device, then save its name and guid.\r
+ std::string name = convertTChar( description );\r
+ if ( name == "Primary Sound Driver" || name == "Primary Sound Capture Driver" )\r
+ name = "Default Device";\r
+ if ( validDevice ) {\r
+ for ( unsigned int i=0; i<dsDevices.size(); i++ ) {\r
+ if ( dsDevices[i].name == name ) {\r
+ dsDevices[i].found = true;\r
+ if ( *isInput ) {\r
+ dsDevices[i].id[1] = lpguid;\r
+ dsDevices[i].validId[1] = true;\r
+ }\r
+ else {\r
+ dsDevices[i].id[0] = lpguid;\r
+ dsDevices[i].validId[0] = true;\r
+ }\r
+ return TRUE;\r
+ }\r
+ }\r
+\r
+ DsDevice device;\r
+ device.name = name;\r
+ device.found = true;\r
+ if ( *isInput ) {\r
+ device.id[1] = lpguid;\r
+ device.validId[1] = true;\r
+ }\r
+ else {\r
+ device.id[0] = lpguid;\r
+ device.validId[0] = true;\r
+ }\r
+ dsDevices.push_back( device );\r
+ }\r
+\r
+ return TRUE;\r
+}\r
+\r
+static const char* getErrorString( int code )\r
+{\r
+ switch ( code ) {\r
+\r
+ case DSERR_ALLOCATED:\r
+ return "Already allocated";\r
+\r
+ case DSERR_CONTROLUNAVAIL:\r
+ return "Control unavailable";\r
+\r
+ case DSERR_INVALIDPARAM:\r
+ return "Invalid parameter";\r
+\r
+ case DSERR_INVALIDCALL:\r
+ return "Invalid call";\r
+\r
+ case DSERR_GENERIC:\r
+ return "Generic error";\r
+\r
+ case DSERR_PRIOLEVELNEEDED:\r
+ return "Priority level needed";\r
+\r
+ case DSERR_OUTOFMEMORY:\r
+ return "Out of memory";\r
+\r
+ case DSERR_BADFORMAT:\r
+ return "The sample rate or the channel format is not supported";\r
+\r
+ case DSERR_UNSUPPORTED:\r
+ return "Not supported";\r
+\r
+ case DSERR_NODRIVER:\r
+ return "No driver";\r
+\r
+ case DSERR_ALREADYINITIALIZED:\r
+ return "Already initialized";\r
+\r
+ case DSERR_NOAGGREGATION:\r
+ return "No aggregation";\r
+\r
+ case DSERR_BUFFERLOST:\r
+ return "Buffer lost";\r
+\r
+ case DSERR_OTHERAPPHASPRIO:\r
+ return "Another application already has priority";\r
+\r
+ case DSERR_UNINITIALIZED:\r
+ return "Uninitialized";\r
+\r
+ default:\r
+ return "DirectSound unknown error";\r
+ }\r
+}\r
+//******************** End of __WINDOWS_DS__ *********************//\r
+#endif\r
+\r
+\r
+#if defined(__LINUX_ALSA__)\r
+\r
+#include <alsa/asoundlib.h>\r
+#include <unistd.h>\r
+\r
+ // A structure to hold various information related to the ALSA API\r
+ // implementation.\r
+struct AlsaHandle {\r
+ snd_pcm_t *handles[2];\r
+ bool synchronized;\r
+ bool xrun[2];\r
+ pthread_cond_t runnable;\r
+\r
+ AlsaHandle()\r
+ :synchronized(false) { xrun[0] = false; xrun[1] = false; }\r
+};\r
+\r
+extern "C" void *alsaCallbackHandler( void * ptr );\r
+\r
+RtApiAlsa :: RtApiAlsa()\r
+{\r
+ // Nothing to do here.\r
+}\r
+\r
+RtApiAlsa :: ~RtApiAlsa()\r
+{\r
+ if ( stream_.state != STREAM_CLOSED ) closeStream();\r
+}\r
+\r
+unsigned int RtApiAlsa :: getDeviceCount( void )\r
+{\r
+ unsigned nDevices = 0;\r
+ int result, subdevice, card;\r
+ char name[64];\r
+ snd_ctl_t *handle;\r
+\r
+ // Count cards and devices\r
+ card = -1;\r
+ snd_card_next( &card );\r
+ while ( card >= 0 ) {\r
+ sprintf( name, "hw:%d", card );\r
+ result = snd_ctl_open( &handle, name, 0 );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::getDeviceCount: control open, card = " << card << ", " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ goto nextcard;\r
+ }\r
+ subdevice = -1;\r
+ while( 1 ) {\r
+ result = snd_ctl_pcm_next_device( handle, &subdevice );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::getDeviceCount: control next device, card = " << card << ", " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ break;\r
+ }\r
+ if ( subdevice < 0 )\r
+ break;\r
+ nDevices++;\r
+ }\r
+ nextcard:\r
+ snd_ctl_close( handle );\r
+ snd_card_next( &card );\r
+ }\r
+\r
+ return nDevices;\r
+}\r
+\r
+RtAudio::DeviceInfo RtApiAlsa :: getDeviceInfo( unsigned int device )\r
+{\r
+ RtAudio::DeviceInfo info;\r
+ info.probed = false;\r
+\r
+ unsigned nDevices = 0;\r
+ int result, subdevice, card;\r
+ char name[64];\r
+ snd_ctl_t *chandle;\r
+\r
+ // Count cards and devices\r
+ card = -1;\r
+ snd_card_next( &card );\r
+ while ( card >= 0 ) {\r
+ sprintf( name, "hw:%d", card );\r
+ result = snd_ctl_open( &chandle, name, SND_CTL_NONBLOCK );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: control open, card = " << card << ", " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ goto nextcard;\r
+ }\r
+ subdevice = -1;\r
+ while( 1 ) {\r
+ result = snd_ctl_pcm_next_device( chandle, &subdevice );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: control next device, card = " << card << ", " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ break;\r
+ }\r
+ if ( subdevice < 0 ) break;\r
+ if ( nDevices == device ) {\r
+ sprintf( name, "hw:%d,%d", card, subdevice );\r
+ goto foundDevice;\r
+ }\r
+ nDevices++;\r
+ }\r
+ nextcard:\r
+ snd_ctl_close( chandle );\r
+ snd_card_next( &card );\r
+ }\r
+\r
+ if ( nDevices == 0 ) {\r
+ errorText_ = "RtApiAlsa::getDeviceInfo: no devices found!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ if ( device >= nDevices ) {\r
+ errorText_ = "RtApiAlsa::getDeviceInfo: device ID is invalid!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ foundDevice:\r
+\r
+ // If a stream is already open, we cannot probe the stream devices.\r
+ // Thus, use the saved results.\r
+ if ( stream_.state != STREAM_CLOSED &&\r
+ ( stream_.device[0] == device || stream_.device[1] == device ) ) {\r
+ if ( device >= devices_.size() ) {\r
+ errorText_ = "RtApiAlsa::getDeviceInfo: device ID was not present before stream was opened.";\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+ return devices_[ device ];\r
+ }\r
+\r
+ int openMode = SND_PCM_ASYNC;\r
+ snd_pcm_stream_t stream;\r
+ snd_pcm_info_t *pcminfo;\r
+ snd_pcm_info_alloca( &pcminfo );\r
+ snd_pcm_t *phandle;\r
+ snd_pcm_hw_params_t *params;\r
+ snd_pcm_hw_params_alloca( ¶ms );\r
+\r
+ // First try for playback\r
+ stream = SND_PCM_STREAM_PLAYBACK;\r
+ snd_pcm_info_set_device( pcminfo, subdevice );\r
+ snd_pcm_info_set_subdevice( pcminfo, 0 );\r
+ snd_pcm_info_set_stream( pcminfo, stream );\r
+\r
+ result = snd_ctl_pcm_info( chandle, pcminfo );\r
+ if ( result < 0 ) {\r
+ // Device probably doesn't support playback.\r
+ goto captureProbe;\r
+ }\r
+\r
+ result = snd_pcm_open( &phandle, name, stream, openMode | SND_PCM_NONBLOCK );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ goto captureProbe;\r
+ }\r
+\r
+ // The device is open ... fill the parameter structure.\r
+ result = snd_pcm_hw_params_any( phandle, params );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_hw_params error for device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ goto captureProbe;\r
+ }\r
+\r
+ // Get output channel information.\r
+ unsigned int value;\r
+ result = snd_pcm_hw_params_get_channels_max( params, &value );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: error getting device (" << name << ") output channels, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ goto captureProbe;\r
+ }\r
+ info.outputChannels = value;\r
+ snd_pcm_close( phandle );\r
+\r
+ captureProbe:\r
+ // Now try for capture\r
+ stream = SND_PCM_STREAM_CAPTURE;\r
+ snd_pcm_info_set_stream( pcminfo, stream );\r
+\r
+ result = snd_ctl_pcm_info( chandle, pcminfo );\r
+ snd_ctl_close( chandle );\r
+ if ( result < 0 ) {\r
+ // Device probably doesn't support capture.\r
+ if ( info.outputChannels == 0 ) return info;\r
+ goto probeParameters;\r
+ }\r
+\r
+ result = snd_pcm_open( &phandle, name, stream, openMode | SND_PCM_NONBLOCK);\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ if ( info.outputChannels == 0 ) return info;\r
+ goto probeParameters;\r
+ }\r
+\r
+ // The device is open ... fill the parameter structure.\r
+ result = snd_pcm_hw_params_any( phandle, params );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_hw_params error for device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ if ( info.outputChannels == 0 ) return info;\r
+ goto probeParameters;\r
+ }\r
+\r
+ result = snd_pcm_hw_params_get_channels_max( params, &value );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: error getting device (" << name << ") input channels, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ if ( info.outputChannels == 0 ) return info;\r
+ goto probeParameters;\r
+ }\r
+ info.inputChannels = value;\r
+ snd_pcm_close( phandle );\r
+\r
+ // If device opens for both playback and capture, we determine the channels.\r
+ if ( info.outputChannels > 0 && info.inputChannels > 0 )\r
+ info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;\r
+\r
+ // ALSA doesn't provide default devices so we'll use the first available one.\r
+ if ( device == 0 && info.outputChannels > 0 )\r
+ info.isDefaultOutput = true;\r
+ if ( device == 0 && info.inputChannels > 0 )\r
+ info.isDefaultInput = true;\r
+\r
+ probeParameters:\r
+ // At this point, we just need to figure out the supported data\r
+ // formats and sample rates. We'll proceed by opening the device in\r
+ // the direction with the maximum number of channels, or playback if\r
+ // they are equal. This might limit our sample rate options, but so\r
+ // be it.\r
+\r
+ if ( info.outputChannels >= info.inputChannels )\r
+ stream = SND_PCM_STREAM_PLAYBACK;\r
+ else\r
+ stream = SND_PCM_STREAM_CAPTURE;\r
+ snd_pcm_info_set_stream( pcminfo, stream );\r
+\r
+ result = snd_pcm_open( &phandle, name, stream, openMode | SND_PCM_NONBLOCK);\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_open error for device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // The device is open ... fill the parameter structure.\r
+ result = snd_pcm_hw_params_any( phandle, params );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: snd_pcm_hw_params error for device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Test our discrete set of sample rate values.\r
+ info.sampleRates.clear();\r
+ for ( unsigned int i=0; i<MAX_SAMPLE_RATES; i++ ) {\r
+ if ( snd_pcm_hw_params_test_rate( phandle, params, SAMPLE_RATES[i], 0 ) == 0 )\r
+ info.sampleRates.push_back( SAMPLE_RATES[i] );\r
+ }\r
+ if ( info.sampleRates.size() == 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: no supported sample rates found for device (" << name << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Probe the supported data formats ... we don't care about endian-ness just yet\r
+ snd_pcm_format_t format;\r
+ info.nativeFormats = 0;\r
+ format = SND_PCM_FORMAT_S8;\r
+ if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )\r
+ info.nativeFormats |= RTAUDIO_SINT8;\r
+ format = SND_PCM_FORMAT_S16;\r
+ if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )\r
+ info.nativeFormats |= RTAUDIO_SINT16;\r
+ format = SND_PCM_FORMAT_S24;\r
+ if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )\r
+ info.nativeFormats |= RTAUDIO_SINT24;\r
+ format = SND_PCM_FORMAT_S32;\r
+ if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )\r
+ info.nativeFormats |= RTAUDIO_SINT32;\r
+ format = SND_PCM_FORMAT_FLOAT;\r
+ if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )\r
+ info.nativeFormats |= RTAUDIO_FLOAT32;\r
+ format = SND_PCM_FORMAT_FLOAT64;\r
+ if ( snd_pcm_hw_params_test_format( phandle, params, format ) == 0 )\r
+ info.nativeFormats |= RTAUDIO_FLOAT64;\r
+\r
+ // Check that we have at least one supported format\r
+ if ( info.nativeFormats == 0 ) {\r
+ errorStream_ << "RtApiAlsa::getDeviceInfo: pcm device (" << name << ") data format not supported by RtAudio.";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Get the device name\r
+ char *cardname;\r
+ result = snd_card_get_name( card, &cardname );\r
+ if ( result >= 0 )\r
+ sprintf( name, "hw:%s,%d", cardname, subdevice );\r
+ info.name = name;\r
+\r
+ // That's all ... close the device and return\r
+ snd_pcm_close( phandle );\r
+ info.probed = true;\r
+ return info;\r
+}\r
+\r
+void RtApiAlsa :: saveDeviceInfo( void )\r
+{\r
+ devices_.clear();\r
+\r
+ unsigned int nDevices = getDeviceCount();\r
+ devices_.resize( nDevices );\r
+ for ( unsigned int i=0; i<nDevices; i++ )\r
+ devices_[i] = getDeviceInfo( i );\r
+}\r
+\r
+bool RtApiAlsa :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,\r
+ unsigned int firstChannel, unsigned int sampleRate,\r
+ RtAudioFormat format, unsigned int *bufferSize,\r
+ RtAudio::StreamOptions *options )\r
+\r
+{\r
+#if defined(__RTAUDIO_DEBUG__)\r
+ snd_output_t *out;\r
+ snd_output_stdio_attach(&out, stderr, 0);\r
+#endif\r
+\r
+ // I'm not using the "plug" interface ... too much inconsistent behavior.\r
+\r
+ unsigned nDevices = 0;\r
+ int result, subdevice, card;\r
+ char name[64];\r
+ snd_ctl_t *chandle;\r
+\r
+ if ( options && options->flags & RTAUDIO_ALSA_USE_DEFAULT )\r
+ snprintf(name, sizeof(name), "%s", "default");\r
+ else {\r
+ // Count cards and devices\r
+ card = -1;\r
+ snd_card_next( &card );\r
+ while ( card >= 0 ) {\r
+ sprintf( name, "hw:%d", card );\r
+ result = snd_ctl_open( &chandle, name, SND_CTL_NONBLOCK );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: control open, card = " << card << ", " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ subdevice = -1;\r
+ while( 1 ) {\r
+ result = snd_ctl_pcm_next_device( chandle, &subdevice );\r
+ if ( result < 0 ) break;\r
+ if ( subdevice < 0 ) break;\r
+ if ( nDevices == device ) {\r
+ sprintf( name, "hw:%d,%d", card, subdevice );\r
+ snd_ctl_close( chandle );\r
+ goto foundDevice;\r
+ }\r
+ nDevices++;\r
+ }\r
+ snd_ctl_close( chandle );\r
+ snd_card_next( &card );\r
+ }\r
+\r
+ if ( nDevices == 0 ) {\r
+ // This should not happen because a check is made before this function is called.\r
+ errorText_ = "RtApiAlsa::probeDeviceOpen: no devices found!";\r
+ return FAILURE;\r
+ }\r
+\r
+ if ( device >= nDevices ) {\r
+ // This should not happen because a check is made before this function is called.\r
+ errorText_ = "RtApiAlsa::probeDeviceOpen: device ID is invalid!";\r
+ return FAILURE;\r
+ }\r
+ }\r
+\r
+ foundDevice:\r
+\r
+ // The getDeviceInfo() function will not work for a device that is\r
+ // already open. Thus, we'll probe the system before opening a\r
+ // stream and save the results for use by getDeviceInfo().\r
+ if ( mode == OUTPUT || ( mode == INPUT && stream_.mode != OUTPUT ) ) // only do once\r
+ this->saveDeviceInfo();\r
+\r
+ snd_pcm_stream_t stream;\r
+ if ( mode == OUTPUT )\r
+ stream = SND_PCM_STREAM_PLAYBACK;\r
+ else\r
+ stream = SND_PCM_STREAM_CAPTURE;\r
+\r
+ snd_pcm_t *phandle;\r
+ int openMode = SND_PCM_ASYNC;\r
+ result = snd_pcm_open( &phandle, name, stream, openMode );\r
+ if ( result < 0 ) {\r
+ if ( mode == OUTPUT )\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: pcm device (" << name << ") won't open for output.";\r
+ else\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: pcm device (" << name << ") won't open for input.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Fill the parameter structure.\r
+ snd_pcm_hw_params_t *hw_params;\r
+ snd_pcm_hw_params_alloca( &hw_params );\r
+ result = snd_pcm_hw_params_any( phandle, hw_params );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error getting pcm device (" << name << ") parameters, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+#if defined(__RTAUDIO_DEBUG__)\r
+ fprintf( stderr, "\nRtApiAlsa: dump hardware params just after device open:\n\n" );\r
+ snd_pcm_hw_params_dump( hw_params, out );\r
+#endif\r
+\r
+ // Set access ... check user preference.\r
+ if ( options && options->flags & RTAUDIO_NONINTERLEAVED ) {\r
+ stream_.userInterleaved = false;\r
+ result = snd_pcm_hw_params_set_access( phandle, hw_params, SND_PCM_ACCESS_RW_NONINTERLEAVED );\r
+ if ( result < 0 ) {\r
+ result = snd_pcm_hw_params_set_access( phandle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED );\r
+ stream_.deviceInterleaved[mode] = true;\r
+ }\r
+ else\r
+ stream_.deviceInterleaved[mode] = false;\r
+ }\r
+ else {\r
+ stream_.userInterleaved = true;\r
+ result = snd_pcm_hw_params_set_access( phandle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED );\r
+ if ( result < 0 ) {\r
+ result = snd_pcm_hw_params_set_access( phandle, hw_params, SND_PCM_ACCESS_RW_NONINTERLEAVED );\r
+ stream_.deviceInterleaved[mode] = false;\r
+ }\r
+ else\r
+ stream_.deviceInterleaved[mode] = true;\r
+ }\r
+\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting pcm device (" << name << ") access, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Determine how to set the device format.\r
+ stream_.userFormat = format;\r
+ snd_pcm_format_t deviceFormat = SND_PCM_FORMAT_UNKNOWN;\r
+\r
+ if ( format == RTAUDIO_SINT8 )\r
+ deviceFormat = SND_PCM_FORMAT_S8;\r
+ else if ( format == RTAUDIO_SINT16 )\r
+ deviceFormat = SND_PCM_FORMAT_S16;\r
+ else if ( format == RTAUDIO_SINT24 )\r
+ deviceFormat = SND_PCM_FORMAT_S24;\r
+ else if ( format == RTAUDIO_SINT32 )\r
+ deviceFormat = SND_PCM_FORMAT_S32;\r
+ else if ( format == RTAUDIO_FLOAT32 )\r
+ deviceFormat = SND_PCM_FORMAT_FLOAT;\r
+ else if ( format == RTAUDIO_FLOAT64 )\r
+ deviceFormat = SND_PCM_FORMAT_FLOAT64;\r
+\r
+ if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat) == 0) {\r
+ stream_.deviceFormat[mode] = format;\r
+ goto setFormat;\r
+ }\r
+\r
+ // The user requested format is not natively supported by the device.\r
+ deviceFormat = SND_PCM_FORMAT_FLOAT64;\r
+ if ( snd_pcm_hw_params_test_format( phandle, hw_params, deviceFormat ) == 0 ) {\r
+ stream_.deviceFormat[mode] = RTAUDIO_FLOAT64;\r
+ goto setFormat;\r
+ }\r
+\r
+ deviceFormat = SND_PCM_FORMAT_FLOAT;\r
+ if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat ) == 0 ) {\r
+ stream_.deviceFormat[mode] = RTAUDIO_FLOAT32;\r
+ goto setFormat;\r
+ }\r
+\r
+ deviceFormat = SND_PCM_FORMAT_S32;\r
+ if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat ) == 0 ) {\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT32;\r
+ goto setFormat;\r
+ }\r
+\r
+ deviceFormat = SND_PCM_FORMAT_S24;\r
+ if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat ) == 0 ) {\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT24;\r
+ goto setFormat;\r
+ }\r
+\r
+ deviceFormat = SND_PCM_FORMAT_S16;\r
+ if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat ) == 0 ) {\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT16;\r
+ goto setFormat;\r
+ }\r
+\r
+ deviceFormat = SND_PCM_FORMAT_S8;\r
+ if ( snd_pcm_hw_params_test_format(phandle, hw_params, deviceFormat ) == 0 ) {\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT8;\r
+ goto setFormat;\r
+ }\r
+\r
+ // If we get here, no supported format was found.\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: pcm device " << device << " data format not supported by RtAudio.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+\r
+ setFormat:\r
+ result = snd_pcm_hw_params_set_format( phandle, hw_params, deviceFormat );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting pcm device (" << name << ") data format, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Determine whether byte-swaping is necessary.\r
+ stream_.doByteSwap[mode] = false;\r
+ if ( deviceFormat != SND_PCM_FORMAT_S8 ) {\r
+ result = snd_pcm_format_cpu_endian( deviceFormat );\r
+ if ( result == 0 )\r
+ stream_.doByteSwap[mode] = true;\r
+ else if (result < 0) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error getting pcm device (" << name << ") endian-ness, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+\r
+ // Set the sample rate.\r
+ result = snd_pcm_hw_params_set_rate_near( phandle, hw_params, (unsigned int*) &sampleRate, 0 );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting sample rate on device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Determine the number of channels for this device. We support a possible\r
+ // minimum device channel number > than the value requested by the user.\r
+ stream_.nUserChannels[mode] = channels;\r
+ unsigned int value;\r
+ result = snd_pcm_hw_params_get_channels_max( hw_params, &value );\r
+ unsigned int deviceChannels = value;\r
+ if ( result < 0 || deviceChannels < channels + firstChannel ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: requested channel parameters not supported by device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ result = snd_pcm_hw_params_get_channels_min( hw_params, &value );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error getting minimum channels for device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ deviceChannels = value;\r
+ if ( deviceChannels < channels + firstChannel ) deviceChannels = channels + firstChannel;\r
+ stream_.nDeviceChannels[mode] = deviceChannels;\r
+\r
+ // Set the device channels.\r
+ result = snd_pcm_hw_params_set_channels( phandle, hw_params, deviceChannels );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting channels for device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Set the buffer (or period) size.\r
+ int dir = 0;\r
+ snd_pcm_uframes_t periodSize = *bufferSize;\r
+ result = snd_pcm_hw_params_set_period_size_near( phandle, hw_params, &periodSize, &dir );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting period size for device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ *bufferSize = periodSize;\r
+\r
+ // Set the buffer number, which in ALSA is referred to as the "period".\r
+ unsigned int periods = 0;\r
+ if ( options && options->flags & RTAUDIO_MINIMIZE_LATENCY ) periods = 2;\r
+ if ( options && options->numberOfBuffers > 0 ) periods = options->numberOfBuffers;\r
+ if ( periods < 2 ) periods = 4; // a fairly safe default value\r
+ result = snd_pcm_hw_params_set_periods_near( phandle, hw_params, &periods, &dir );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error setting periods for device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // If attempting to setup a duplex stream, the bufferSize parameter\r
+ // MUST be the same in both directions!\r
+ if ( stream_.mode == OUTPUT && mode == INPUT && *bufferSize != stream_.bufferSize ) {\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: system error setting buffer size for duplex stream on device (" << name << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ stream_.bufferSize = *bufferSize;\r
+\r
+ // Install the hardware configuration\r
+ result = snd_pcm_hw_params( phandle, hw_params );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error installing hardware configuration on device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+#if defined(__RTAUDIO_DEBUG__)\r
+ fprintf(stderr, "\nRtApiAlsa: dump hardware params after installation:\n\n");\r
+ snd_pcm_hw_params_dump( hw_params, out );\r
+#endif\r
+\r
+ // Set the software configuration to fill buffers with zeros and prevent device stopping on xruns.\r
+ snd_pcm_sw_params_t *sw_params = NULL;\r
+ snd_pcm_sw_params_alloca( &sw_params );\r
+ snd_pcm_sw_params_current( phandle, sw_params );\r
+ snd_pcm_sw_params_set_start_threshold( phandle, sw_params, *bufferSize );\r
+ snd_pcm_sw_params_set_stop_threshold( phandle, sw_params, ULONG_MAX );\r
+ snd_pcm_sw_params_set_silence_threshold( phandle, sw_params, 0 );\r
+\r
+ // The following two settings were suggested by Theo Veenker\r
+ //snd_pcm_sw_params_set_avail_min( phandle, sw_params, *bufferSize );\r
+ //snd_pcm_sw_params_set_xfer_align( phandle, sw_params, 1 );\r
+\r
+ // here are two options for a fix\r
+ //snd_pcm_sw_params_set_silence_size( phandle, sw_params, ULONG_MAX );\r
+ snd_pcm_uframes_t val;\r
+ snd_pcm_sw_params_get_boundary( sw_params, &val );\r
+ snd_pcm_sw_params_set_silence_size( phandle, sw_params, val );\r
+\r
+ result = snd_pcm_sw_params( phandle, sw_params );\r
+ if ( result < 0 ) {\r
+ snd_pcm_close( phandle );\r
+ errorStream_ << "RtApiAlsa::probeDeviceOpen: error installing software configuration on device (" << name << "), " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+#if defined(__RTAUDIO_DEBUG__)\r
+ fprintf(stderr, "\nRtApiAlsa: dump software params after installation:\n\n");\r
+ snd_pcm_sw_params_dump( sw_params, out );\r
+#endif\r
+\r
+ // Set flags for buffer conversion\r
+ stream_.doConvertBuffer[mode] = false;\r
+ if ( stream_.userFormat != stream_.deviceFormat[mode] )\r
+ stream_.doConvertBuffer[mode] = true;\r
+ if ( stream_.nUserChannels[mode] < stream_.nDeviceChannels[mode] )\r
+ stream_.doConvertBuffer[mode] = true;\r
+ if ( stream_.userInterleaved != stream_.deviceInterleaved[mode] &&\r
+ stream_.nUserChannels[mode] > 1 )\r
+ stream_.doConvertBuffer[mode] = true;\r
+\r
+ // Allocate the ApiHandle if necessary and then save.\r
+ AlsaHandle *apiInfo = 0;\r
+ if ( stream_.apiHandle == 0 ) {\r
+ try {\r
+ apiInfo = (AlsaHandle *) new AlsaHandle;\r
+ }\r
+ catch ( std::bad_alloc& ) {\r
+ errorText_ = "RtApiAlsa::probeDeviceOpen: error allocating AlsaHandle memory.";\r
+ goto error;\r
+ }\r
+\r
+ if ( pthread_cond_init( &apiInfo->runnable, NULL ) ) {\r
+ errorText_ = "RtApiAlsa::probeDeviceOpen: error initializing pthread condition variable.";\r
+ goto error;\r
+ }\r
+\r
+ stream_.apiHandle = (void *) apiInfo;\r
+ apiInfo->handles[0] = 0;\r
+ apiInfo->handles[1] = 0;\r
+ }\r
+ else {\r
+ apiInfo = (AlsaHandle *) stream_.apiHandle;\r
+ }\r
+ apiInfo->handles[mode] = phandle;\r
+\r
+ // Allocate necessary internal buffers.\r
+ unsigned long bufferBytes;\r
+ bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );\r
+ stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.userBuffer[mode] == NULL ) {\r
+ errorText_ = "RtApiAlsa::probeDeviceOpen: error allocating user buffer memory.";\r
+ goto error;\r
+ }\r
+\r
+ if ( stream_.doConvertBuffer[mode] ) {\r
+\r
+ bool makeBuffer = true;\r
+ bufferBytes = stream_.nDeviceChannels[mode] * formatBytes( stream_.deviceFormat[mode] );\r
+ if ( mode == INPUT ) {\r
+ if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {\r
+ unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );\r
+ if ( bufferBytes <= bytesOut ) makeBuffer = false;\r
+ }\r
+ }\r
+\r
+ if ( makeBuffer ) {\r
+ bufferBytes *= *bufferSize;\r
+ if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.deviceBuffer == NULL ) {\r
+ errorText_ = "RtApiAlsa::probeDeviceOpen: error allocating device buffer memory.";\r
+ goto error;\r
+ }\r
+ }\r
+ }\r
+\r
+ stream_.sampleRate = sampleRate;\r
+ stream_.nBuffers = periods;\r
+ stream_.device[mode] = device;\r
+ stream_.state = STREAM_STOPPED;\r
+\r
+ // Setup the buffer conversion information structure.\r
+ if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, firstChannel );\r
+\r
+ // Setup thread if necessary.\r
+ if ( stream_.mode == OUTPUT && mode == INPUT ) {\r
+ // We had already set up an output stream.\r
+ stream_.mode = DUPLEX;\r
+ // Link the streams if possible.\r
+ apiInfo->synchronized = false;\r
+ if ( snd_pcm_link( apiInfo->handles[0], apiInfo->handles[1] ) == 0 )\r
+ apiInfo->synchronized = true;\r
+ else {\r
+ errorText_ = "RtApiAlsa::probeDeviceOpen: unable to synchronize input and output devices.";\r
+ error( RtError::WARNING );\r
+ }\r
+ }\r
+ else {\r
+ stream_.mode = mode;\r
+\r
+ // Setup callback thread.\r
+ stream_.callbackInfo.object = (void *) this;\r
+\r
+ // Set the thread attributes for joinable and realtime scheduling\r
+ // priority (optional). The higher priority will only take affect\r
+ // if the program is run as root or suid. Note, under Linux\r
+ // processes with CAP_SYS_NICE privilege, a user can change\r
+ // scheduling policy and priority (thus need not be root). See\r
+ // POSIX "capabilities".\r
+ pthread_attr_t attr;\r
+ pthread_attr_init( &attr );\r
+ pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_JOINABLE );\r
+#ifdef SCHED_RR // Undefined with some OSes (eg: NetBSD 1.6.x with GNU Pthread)\r
+ if ( options && options->flags & RTAUDIO_SCHEDULE_REALTIME ) {\r
+ struct sched_param param;\r
+ int priority = options->priority;\r
+ int min = sched_get_priority_min( SCHED_RR );\r
+ int max = sched_get_priority_max( SCHED_RR );\r
+ if ( priority < min ) priority = min;\r
+ else if ( priority > max ) priority = max;\r
+ param.sched_priority = priority;\r
+ pthread_attr_setschedparam( &attr, ¶m );\r
+ pthread_attr_setschedpolicy( &attr, SCHED_RR );\r
+ }\r
+ else\r
+ pthread_attr_setschedpolicy( &attr, SCHED_OTHER );\r
+#else\r
+ pthread_attr_setschedpolicy( &attr, SCHED_OTHER );\r
+#endif\r
+\r
+ stream_.callbackInfo.isRunning = true;\r
+ result = pthread_create( &stream_.callbackInfo.thread, &attr, alsaCallbackHandler, &stream_.callbackInfo );\r
+ pthread_attr_destroy( &attr );\r
+ if ( result ) {\r
+ stream_.callbackInfo.isRunning = false;\r
+ errorText_ = "RtApiAlsa::error creating callback thread!";\r
+ goto error;\r
+ }\r
+ }\r
+\r
+ return SUCCESS;\r
+\r
+ error:\r
+ if ( apiInfo ) {\r
+ pthread_cond_destroy( &apiInfo->runnable );\r
+ if ( apiInfo->handles[0] ) snd_pcm_close( apiInfo->handles[0] );\r
+ if ( apiInfo->handles[1] ) snd_pcm_close( apiInfo->handles[1] );\r
+ delete apiInfo;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ return FAILURE;\r
+}\r
+\r
+void RtApiAlsa :: closeStream()\r
+{\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiAlsa::closeStream(): no open stream to close!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ AlsaHandle *apiInfo = (AlsaHandle *) stream_.apiHandle;\r
+ stream_.callbackInfo.isRunning = false;\r
+ MUTEX_LOCK( &stream_.mutex );\r
+ if ( stream_.state == STREAM_STOPPED )\r
+ pthread_cond_signal( &apiInfo->runnable );\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ pthread_join( stream_.callbackInfo.thread, NULL );\r
+\r
+ if ( stream_.state == STREAM_RUNNING ) {\r
+ stream_.state = STREAM_STOPPED;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX )\r
+ snd_pcm_drop( apiInfo->handles[0] );\r
+ if ( stream_.mode == INPUT || stream_.mode == DUPLEX )\r
+ snd_pcm_drop( apiInfo->handles[1] );\r
+ }\r
+\r
+ if ( apiInfo ) {\r
+ pthread_cond_destroy( &apiInfo->runnable );\r
+ if ( apiInfo->handles[0] ) snd_pcm_close( apiInfo->handles[0] );\r
+ if ( apiInfo->handles[1] ) snd_pcm_close( apiInfo->handles[1] );\r
+ delete apiInfo;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ stream_.mode = UNINITIALIZED;\r
+ stream_.state = STREAM_CLOSED;\r
+}\r
+\r
+void RtApiAlsa :: startStream()\r
+{\r
+ // This method calls snd_pcm_prepare if the device isn't already in that state.\r
+\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_RUNNING ) {\r
+ errorText_ = "RtApiAlsa::startStream(): the stream is already running!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ int result = 0;\r
+ snd_pcm_state_t state;\r
+ AlsaHandle *apiInfo = (AlsaHandle *) stream_.apiHandle;\r
+ snd_pcm_t **handle = (snd_pcm_t **) apiInfo->handles;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+ state = snd_pcm_state( handle[0] );\r
+ if ( state != SND_PCM_STATE_PREPARED ) {\r
+ result = snd_pcm_prepare( handle[0] );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::startStream: error preparing output pcm device, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+ }\r
+\r
+ if ( ( stream_.mode == INPUT || stream_.mode == DUPLEX ) && !apiInfo->synchronized ) {\r
+ state = snd_pcm_state( handle[1] );\r
+ if ( state != SND_PCM_STATE_PREPARED ) {\r
+ result = snd_pcm_prepare( handle[1] );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::startStream: error preparing input pcm device, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+ }\r
+\r
+ stream_.state = STREAM_RUNNING;\r
+\r
+ unlock:\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ pthread_cond_signal( &apiInfo->runnable );\r
+\r
+ if ( result >= 0 ) return;\r
+ error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiAlsa :: stopStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiAlsa::stopStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ stream_.state = STREAM_STOPPED;\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ //if ( stream_.state == STREAM_STOPPED ) {\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+ // return;\r
+ //}\r
+\r
+ int result = 0;\r
+ AlsaHandle *apiInfo = (AlsaHandle *) stream_.apiHandle;\r
+ snd_pcm_t **handle = (snd_pcm_t **) apiInfo->handles;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+ if ( apiInfo->synchronized ) \r
+ result = snd_pcm_drop( handle[0] );\r
+ else\r
+ result = snd_pcm_drain( handle[0] );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::stopStream: error draining output pcm device, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ if ( ( stream_.mode == INPUT || stream_.mode == DUPLEX ) && !apiInfo->synchronized ) {\r
+ result = snd_pcm_drop( handle[1] );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::stopStream: error stopping input pcm device, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ unlock:\r
+ stream_.state = STREAM_STOPPED;\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ if ( result >= 0 ) return;\r
+ error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiAlsa :: abortStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiAlsa::abortStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ stream_.state = STREAM_STOPPED;\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ //if ( stream_.state == STREAM_STOPPED ) {\r
+ // MUTEX_UNLOCK( &stream_.mutex );\r
+ // return;\r
+ //}\r
+\r
+ int result = 0;\r
+ AlsaHandle *apiInfo = (AlsaHandle *) stream_.apiHandle;\r
+ snd_pcm_t **handle = (snd_pcm_t **) apiInfo->handles;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+ result = snd_pcm_drop( handle[0] );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::abortStream: error aborting output pcm device, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ if ( ( stream_.mode == INPUT || stream_.mode == DUPLEX ) && !apiInfo->synchronized ) {\r
+ result = snd_pcm_drop( handle[1] );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::abortStream: error aborting input pcm device, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ unlock:\r
+ stream_.state = STREAM_STOPPED;\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ if ( result >= 0 ) return;\r
+ error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiAlsa :: callbackEvent()\r
+{\r
+ AlsaHandle *apiInfo = (AlsaHandle *) stream_.apiHandle;\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_LOCK( &stream_.mutex );\r
+ pthread_cond_wait( &apiInfo->runnable, &stream_.mutex );\r
+ if ( stream_.state != STREAM_RUNNING ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return;\r
+ }\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ }\r
+\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiAlsa::callbackEvent(): the stream is closed ... this shouldn't happen!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ int doStopStream = 0;\r
+ RtAudioCallback callback = (RtAudioCallback) stream_.callbackInfo.callback;\r
+ double streamTime = getStreamTime();\r
+ RtAudioStreamStatus status = 0;\r
+ if ( stream_.mode != INPUT && apiInfo->xrun[0] == true ) {\r
+ status |= RTAUDIO_OUTPUT_UNDERFLOW;\r
+ apiInfo->xrun[0] = false;\r
+ }\r
+ if ( stream_.mode != OUTPUT && apiInfo->xrun[1] == true ) {\r
+ status |= RTAUDIO_INPUT_OVERFLOW;\r
+ apiInfo->xrun[1] = false;\r
+ }\r
+ doStopStream = callback( stream_.userBuffer[0], stream_.userBuffer[1],\r
+ stream_.bufferSize, streamTime, status, stream_.callbackInfo.userData );\r
+\r
+ if ( doStopStream == 2 ) {\r
+ abortStream();\r
+ return;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ // The state might change while waiting on a mutex.\r
+ if ( stream_.state == STREAM_STOPPED ) goto unlock;\r
+\r
+ int result;\r
+ char *buffer;\r
+ int channels;\r
+ snd_pcm_t **handle;\r
+ snd_pcm_sframes_t frames;\r
+ RtAudioFormat format;\r
+ handle = (snd_pcm_t **) apiInfo->handles;\r
+\r
+ if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {\r
+\r
+ // Setup parameters.\r
+ if ( stream_.doConvertBuffer[1] ) {\r
+ buffer = stream_.deviceBuffer;\r
+ channels = stream_.nDeviceChannels[1];\r
+ format = stream_.deviceFormat[1];\r
+ }\r
+ else {\r
+ buffer = stream_.userBuffer[1];\r
+ channels = stream_.nUserChannels[1];\r
+ format = stream_.userFormat;\r
+ }\r
+\r
+ // Read samples from device in interleaved/non-interleaved format.\r
+ if ( stream_.deviceInterleaved[1] )\r
+ result = snd_pcm_readi( handle[1], buffer, stream_.bufferSize );\r
+ else {\r
+ void *bufs[channels];\r
+ size_t offset = stream_.bufferSize * formatBytes( format );\r
+ for ( int i=0; i<channels; i++ )\r
+ bufs[i] = (void *) (buffer + (i * offset));\r
+ result = snd_pcm_readn( handle[1], bufs, stream_.bufferSize );\r
+ }\r
+\r
+ if ( result < (int) stream_.bufferSize ) {\r
+ // Either an error or overrun occured.\r
+ if ( result == -EPIPE ) {\r
+ snd_pcm_state_t state = snd_pcm_state( handle[1] );\r
+ if ( state == SND_PCM_STATE_XRUN ) {\r
+ apiInfo->xrun[1] = true;\r
+ result = snd_pcm_prepare( handle[1] );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::callbackEvent: error preparing device after overrun, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ }\r
+ }\r
+ else {\r
+ errorStream_ << "RtApiAlsa::callbackEvent: error, current state is " << snd_pcm_state_name( state ) << ", " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ }\r
+ }\r
+ else {\r
+ errorStream_ << "RtApiAlsa::callbackEvent: audio read error, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ }\r
+ error( RtError::WARNING );\r
+ goto tryOutput;\r
+ }\r
+\r
+ // Do byte swapping if necessary.\r
+ if ( stream_.doByteSwap[1] )\r
+ byteSwapBuffer( buffer, stream_.bufferSize * channels, format );\r
+\r
+ // Do buffer conversion if necessary.\r
+ if ( stream_.doConvertBuffer[1] )\r
+ convertBuffer( stream_.userBuffer[1], stream_.deviceBuffer, stream_.convertInfo[1] );\r
+\r
+ // Check stream latency\r
+ result = snd_pcm_delay( handle[1], &frames );\r
+ if ( result == 0 && frames > 0 ) stream_.latency[1] = frames;\r
+ }\r
+\r
+ tryOutput:\r
+\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+\r
+ // Setup parameters and do buffer conversion if necessary.\r
+ if ( stream_.doConvertBuffer[0] ) {\r
+ buffer = stream_.deviceBuffer;\r
+ convertBuffer( buffer, stream_.userBuffer[0], stream_.convertInfo[0] );\r
+ channels = stream_.nDeviceChannels[0];\r
+ format = stream_.deviceFormat[0];\r
+ }\r
+ else {\r
+ buffer = stream_.userBuffer[0];\r
+ channels = stream_.nUserChannels[0];\r
+ format = stream_.userFormat;\r
+ }\r
+\r
+ // Do byte swapping if necessary.\r
+ if ( stream_.doByteSwap[0] )\r
+ byteSwapBuffer(buffer, stream_.bufferSize * channels, format);\r
+\r
+ // Write samples to device in interleaved/non-interleaved format.\r
+ if ( stream_.deviceInterleaved[0] )\r
+ result = snd_pcm_writei( handle[0], buffer, stream_.bufferSize );\r
+ else {\r
+ void *bufs[channels];\r
+ size_t offset = stream_.bufferSize * formatBytes( format );\r
+ for ( int i=0; i<channels; i++ )\r
+ bufs[i] = (void *) (buffer + (i * offset));\r
+ result = snd_pcm_writen( handle[0], bufs, stream_.bufferSize );\r
+ }\r
+\r
+ if ( result < (int) stream_.bufferSize ) {\r
+ // Either an error or underrun occured.\r
+ if ( result == -EPIPE ) {\r
+ snd_pcm_state_t state = snd_pcm_state( handle[0] );\r
+ if ( state == SND_PCM_STATE_XRUN ) {\r
+ apiInfo->xrun[0] = true;\r
+ result = snd_pcm_prepare( handle[0] );\r
+ if ( result < 0 ) {\r
+ errorStream_ << "RtApiAlsa::callbackEvent: error preparing device after underrun, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ }\r
+ }\r
+ else {\r
+ errorStream_ << "RtApiAlsa::callbackEvent: error, current state is " << snd_pcm_state_name( state ) << ", " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ }\r
+ }\r
+ else {\r
+ errorStream_ << "RtApiAlsa::callbackEvent: audio write error, " << snd_strerror( result ) << ".";\r
+ errorText_ = errorStream_.str();\r
+ }\r
+ error( RtError::WARNING );\r
+ goto unlock;\r
+ }\r
+\r
+ // Check stream latency\r
+ result = snd_pcm_delay( handle[0], &frames );\r
+ if ( result == 0 && frames > 0 ) stream_.latency[0] = frames;\r
+ }\r
+\r
+ unlock:\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ RtApi::tickStreamTime();\r
+ if ( doStopStream == 1 ) this->stopStream();\r
+}\r
+\r
+extern "C" void *alsaCallbackHandler( void *ptr )\r
+{\r
+ CallbackInfo *info = (CallbackInfo *) ptr;\r
+ RtApiAlsa *object = (RtApiAlsa *) info->object;\r
+ bool *isRunning = &info->isRunning;\r
+\r
+ while ( *isRunning == true ) {\r
+ pthread_testcancel();\r
+ object->callbackEvent();\r
+ }\r
+\r
+ pthread_exit( NULL );\r
+}\r
+\r
+//******************** End of __LINUX_ALSA__ *********************//\r
+#endif\r
+\r
+\r
+#if defined(__LINUX_OSS__)\r
+\r
+#include <unistd.h>\r
+#include <sys/ioctl.h>\r
+#include <unistd.h>\r
+#include <fcntl.h>\r
+#include "soundcard.h"\r
+#include <errno.h>\r
+#include <math.h>\r
+\r
+extern "C" void *ossCallbackHandler(void * ptr);\r
+\r
+// A structure to hold various information related to the OSS API\r
+// implementation.\r
+struct OssHandle {\r
+ int id[2]; // device ids\r
+ bool xrun[2];\r
+ bool triggered;\r
+ pthread_cond_t runnable;\r
+\r
+ OssHandle()\r
+ :triggered(false) { id[0] = 0; id[1] = 0; xrun[0] = false; xrun[1] = false; }\r
+};\r
+\r
+RtApiOss :: RtApiOss()\r
+{\r
+ // Nothing to do here.\r
+}\r
+\r
+RtApiOss :: ~RtApiOss()\r
+{\r
+ if ( stream_.state != STREAM_CLOSED ) closeStream();\r
+}\r
+\r
+unsigned int RtApiOss :: getDeviceCount( void )\r
+{\r
+ int mixerfd = open( "/dev/mixer", O_RDWR, 0 );\r
+ if ( mixerfd == -1 ) {\r
+ errorText_ = "RtApiOss::getDeviceCount: error opening '/dev/mixer'.";\r
+ error( RtError::WARNING );\r
+ return 0;\r
+ }\r
+\r
+ oss_sysinfo sysinfo;\r
+ if ( ioctl( mixerfd, SNDCTL_SYSINFO, &sysinfo ) == -1 ) {\r
+ close( mixerfd );\r
+ errorText_ = "RtApiOss::getDeviceCount: error getting sysinfo, OSS version >= 4.0 is required.";\r
+ error( RtError::WARNING );\r
+ return 0;\r
+ }\r
+\r
+ close( mixerfd );\r
+ return sysinfo.numaudios;\r
+}\r
+\r
+RtAudio::DeviceInfo RtApiOss :: getDeviceInfo( unsigned int device )\r
+{\r
+ RtAudio::DeviceInfo info;\r
+ info.probed = false;\r
+\r
+ int mixerfd = open( "/dev/mixer", O_RDWR, 0 );\r
+ if ( mixerfd == -1 ) {\r
+ errorText_ = "RtApiOss::getDeviceInfo: error opening '/dev/mixer'.";\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ oss_sysinfo sysinfo;\r
+ int result = ioctl( mixerfd, SNDCTL_SYSINFO, &sysinfo );\r
+ if ( result == -1 ) {\r
+ close( mixerfd );\r
+ errorText_ = "RtApiOss::getDeviceInfo: error getting sysinfo, OSS version >= 4.0 is required.";\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ unsigned nDevices = sysinfo.numaudios;\r
+ if ( nDevices == 0 ) {\r
+ close( mixerfd );\r
+ errorText_ = "RtApiOss::getDeviceInfo: no devices found!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ if ( device >= nDevices ) {\r
+ close( mixerfd );\r
+ errorText_ = "RtApiOss::getDeviceInfo: device ID is invalid!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+\r
+ oss_audioinfo ainfo;\r
+ ainfo.dev = device;\r
+ result = ioctl( mixerfd, SNDCTL_AUDIOINFO, &ainfo );\r
+ close( mixerfd );\r
+ if ( result == -1 ) {\r
+ errorStream_ << "RtApiOss::getDeviceInfo: error getting device (" << ainfo.name << ") info.";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Probe channels\r
+ if ( ainfo.caps & PCM_CAP_OUTPUT ) info.outputChannels = ainfo.max_channels;\r
+ if ( ainfo.caps & PCM_CAP_INPUT ) info.inputChannels = ainfo.max_channels;\r
+ if ( ainfo.caps & PCM_CAP_DUPLEX ) {\r
+ if ( info.outputChannels > 0 && info.inputChannels > 0 && ainfo.caps & PCM_CAP_DUPLEX )\r
+ info.duplexChannels = (info.outputChannels > info.inputChannels) ? info.inputChannels : info.outputChannels;\r
+ }\r
+\r
+ // Probe data formats ... do for input\r
+ unsigned long mask = ainfo.iformats;\r
+ if ( mask & AFMT_S16_LE || mask & AFMT_S16_BE )\r
+ info.nativeFormats |= RTAUDIO_SINT16;\r
+ if ( mask & AFMT_S8 )\r
+ info.nativeFormats |= RTAUDIO_SINT8;\r
+ if ( mask & AFMT_S32_LE || mask & AFMT_S32_BE )\r
+ info.nativeFormats |= RTAUDIO_SINT32;\r
+ if ( mask & AFMT_FLOAT )\r
+ info.nativeFormats |= RTAUDIO_FLOAT32;\r
+ if ( mask & AFMT_S24_LE || mask & AFMT_S24_BE )\r
+ info.nativeFormats |= RTAUDIO_SINT24;\r
+\r
+ // Check that we have at least one supported format\r
+ if ( info.nativeFormats == 0 ) {\r
+ errorStream_ << "RtApiOss::getDeviceInfo: device (" << ainfo.name << ") data format not supported by RtAudio.";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ return info;\r
+ }\r
+\r
+ // Probe the supported sample rates.\r
+ info.sampleRates.clear();\r
+ if ( ainfo.nrates ) {\r
+ for ( unsigned int i=0; i<ainfo.nrates; i++ ) {\r
+ for ( unsigned int k=0; k<MAX_SAMPLE_RATES; k++ ) {\r
+ if ( ainfo.rates[i] == SAMPLE_RATES[k] ) {\r
+ info.sampleRates.push_back( SAMPLE_RATES[k] );\r
+ break;\r
+ }\r
+ }\r
+ }\r
+ }\r
+ else {\r
+ // Check min and max rate values;\r
+ for ( unsigned int k=0; k<MAX_SAMPLE_RATES; k++ ) {\r
+ if ( ainfo.min_rate <= (int) SAMPLE_RATES[k] && ainfo.max_rate >= (int) SAMPLE_RATES[k] )\r
+ info.sampleRates.push_back( SAMPLE_RATES[k] );\r
+ }\r
+ }\r
+\r
+ if ( info.sampleRates.size() == 0 ) {\r
+ errorStream_ << "RtApiOss::getDeviceInfo: no supported sample rates found for device (" << ainfo.name << ").";\r
+ errorText_ = errorStream_.str();\r
+ error( RtError::WARNING );\r
+ }\r
+ else {\r
+ info.probed = true;\r
+ info.name = ainfo.name;\r
+ }\r
+\r
+ return info;\r
+}\r
+\r
+\r
+bool RtApiOss :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigned int channels,\r
+ unsigned int firstChannel, unsigned int sampleRate,\r
+ RtAudioFormat format, unsigned int *bufferSize,\r
+ RtAudio::StreamOptions *options )\r
+{\r
+ int mixerfd = open( "/dev/mixer", O_RDWR, 0 );\r
+ if ( mixerfd == -1 ) {\r
+ errorText_ = "RtApiOss::probeDeviceOpen: error opening '/dev/mixer'.";\r
+ return FAILURE;\r
+ }\r
+\r
+ oss_sysinfo sysinfo;\r
+ int result = ioctl( mixerfd, SNDCTL_SYSINFO, &sysinfo );\r
+ if ( result == -1 ) {\r
+ close( mixerfd );\r
+ errorText_ = "RtApiOss::probeDeviceOpen: error getting sysinfo, OSS version >= 4.0 is required.";\r
+ return FAILURE;\r
+ }\r
+\r
+ unsigned nDevices = sysinfo.numaudios;\r
+ if ( nDevices == 0 ) {\r
+ // This should not happen because a check is made before this function is called.\r
+ close( mixerfd );\r
+ errorText_ = "RtApiOss::probeDeviceOpen: no devices found!";\r
+ return FAILURE;\r
+ }\r
+\r
+ if ( device >= nDevices ) {\r
+ // This should not happen because a check is made before this function is called.\r
+ close( mixerfd );\r
+ errorText_ = "RtApiOss::probeDeviceOpen: device ID is invalid!";\r
+ return FAILURE;\r
+ }\r
+\r
+ oss_audioinfo ainfo;\r
+ ainfo.dev = device;\r
+ result = ioctl( mixerfd, SNDCTL_AUDIOINFO, &ainfo );\r
+ close( mixerfd );\r
+ if ( result == -1 ) {\r
+ errorStream_ << "RtApiOss::getDeviceInfo: error getting device (" << ainfo.name << ") info.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Check if device supports input or output\r
+ if ( ( mode == OUTPUT && !( ainfo.caps & PCM_CAP_OUTPUT ) ) ||\r
+ ( mode == INPUT && !( ainfo.caps & PCM_CAP_INPUT ) ) ) {\r
+ if ( mode == OUTPUT )\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") does not support output.";\r
+ else\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") does not support input.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ int flags = 0;\r
+ OssHandle *handle = (OssHandle *) stream_.apiHandle;\r
+ if ( mode == OUTPUT )\r
+ flags |= O_WRONLY;\r
+ else { // mode == INPUT\r
+ if (stream_.mode == OUTPUT && stream_.device[0] == device) {\r
+ // We just set the same device for playback ... close and reopen for duplex (OSS only).\r
+ close( handle->id[0] );\r
+ handle->id[0] = 0;\r
+ if ( !( ainfo.caps & PCM_CAP_DUPLEX ) ) {\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") does not support duplex mode.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ // Check that the number previously set channels is the same.\r
+ if ( stream_.nUserChannels[0] != channels ) {\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: input/output channels must be equal for OSS duplex device (" << ainfo.name << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ flags |= O_RDWR;\r
+ }\r
+ else\r
+ flags |= O_RDONLY;\r
+ }\r
+\r
+ // Set exclusive access if specified.\r
+ if ( options && options->flags & RTAUDIO_HOG_DEVICE ) flags |= O_EXCL;\r
+\r
+ // Try to open the device.\r
+ int fd;\r
+ fd = open( ainfo.devnode, flags, 0 );\r
+ if ( fd == -1 ) {\r
+ if ( errno == EBUSY )\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") is busy.";\r
+ else\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: error opening device (" << ainfo.name << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // For duplex operation, specifically set this mode (this doesn't seem to work).\r
+ /*\r
+ if ( flags | O_RDWR ) {\r
+ result = ioctl( fd, SNDCTL_DSP_SETDUPLEX, NULL );\r
+ if ( result == -1) {\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: error setting duplex mode for device (" << ainfo.name << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ }\r
+ */\r
+\r
+ // Check the device channel support.\r
+ stream_.nUserChannels[mode] = channels;\r
+ if ( ainfo.max_channels < (int)(channels + firstChannel) ) {\r
+ close( fd );\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: the device (" << ainfo.name << ") does not support requested channel parameters.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Set the number of channels.\r
+ int deviceChannels = channels + firstChannel;\r
+ result = ioctl( fd, SNDCTL_DSP_CHANNELS, &deviceChannels );\r
+ if ( result == -1 || deviceChannels < (int)(channels + firstChannel) ) {\r
+ close( fd );\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: error setting channel parameters on device (" << ainfo.name << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ stream_.nDeviceChannels[mode] = deviceChannels;\r
+\r
+ // Get the data format mask\r
+ int mask;\r
+ result = ioctl( fd, SNDCTL_DSP_GETFMTS, &mask );\r
+ if ( result == -1 ) {\r
+ close( fd );\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: error getting device (" << ainfo.name << ") data formats.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Determine how to set the device format.\r
+ stream_.userFormat = format;\r
+ int deviceFormat = -1;\r
+ stream_.doByteSwap[mode] = false;\r
+ if ( format == RTAUDIO_SINT8 ) {\r
+ if ( mask & AFMT_S8 ) {\r
+ deviceFormat = AFMT_S8;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT8;\r
+ }\r
+ }\r
+ else if ( format == RTAUDIO_SINT16 ) {\r
+ if ( mask & AFMT_S16_NE ) {\r
+ deviceFormat = AFMT_S16_NE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT16;\r
+ }\r
+ else if ( mask & AFMT_S16_OE ) {\r
+ deviceFormat = AFMT_S16_OE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT16;\r
+ stream_.doByteSwap[mode] = true;\r
+ }\r
+ }\r
+ else if ( format == RTAUDIO_SINT24 ) {\r
+ if ( mask & AFMT_S24_NE ) {\r
+ deviceFormat = AFMT_S24_NE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT24;\r
+ }\r
+ else if ( mask & AFMT_S24_OE ) {\r
+ deviceFormat = AFMT_S24_OE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT24;\r
+ stream_.doByteSwap[mode] = true;\r
+ }\r
+ }\r
+ else if ( format == RTAUDIO_SINT32 ) {\r
+ if ( mask & AFMT_S32_NE ) {\r
+ deviceFormat = AFMT_S32_NE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT32;\r
+ }\r
+ else if ( mask & AFMT_S32_OE ) {\r
+ deviceFormat = AFMT_S32_OE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT32;\r
+ stream_.doByteSwap[mode] = true;\r
+ }\r
+ }\r
+\r
+ if ( deviceFormat == -1 ) {\r
+ // The user requested format is not natively supported by the device.\r
+ if ( mask & AFMT_S16_NE ) {\r
+ deviceFormat = AFMT_S16_NE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT16;\r
+ }\r
+ else if ( mask & AFMT_S32_NE ) {\r
+ deviceFormat = AFMT_S32_NE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT32;\r
+ }\r
+ else if ( mask & AFMT_S24_NE ) {\r
+ deviceFormat = AFMT_S24_NE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT24;\r
+ }\r
+ else if ( mask & AFMT_S16_OE ) {\r
+ deviceFormat = AFMT_S16_OE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT16;\r
+ stream_.doByteSwap[mode] = true;\r
+ }\r
+ else if ( mask & AFMT_S32_OE ) {\r
+ deviceFormat = AFMT_S32_OE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT32;\r
+ stream_.doByteSwap[mode] = true;\r
+ }\r
+ else if ( mask & AFMT_S24_OE ) {\r
+ deviceFormat = AFMT_S24_OE;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT24;\r
+ stream_.doByteSwap[mode] = true;\r
+ }\r
+ else if ( mask & AFMT_S8) {\r
+ deviceFormat = AFMT_S8;\r
+ stream_.deviceFormat[mode] = RTAUDIO_SINT8;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceFormat[mode] == 0 ) {\r
+ // This really shouldn't happen ...\r
+ close( fd );\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") data format not supported by RtAudio.";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Set the data format.\r
+ int temp = deviceFormat;\r
+ result = ioctl( fd, SNDCTL_DSP_SETFMT, &deviceFormat );\r
+ if ( result == -1 || deviceFormat != temp ) {\r
+ close( fd );\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: error setting data format on device (" << ainfo.name << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Attempt to set the buffer size. According to OSS, the minimum\r
+ // number of buffers is two. The supposed minimum buffer size is 16\r
+ // bytes, so that will be our lower bound. The argument to this\r
+ // call is in the form 0xMMMMSSSS (hex), where the buffer size (in\r
+ // bytes) is given as 2^SSSS and the number of buffers as 2^MMMM.\r
+ // We'll check the actual value used near the end of the setup\r
+ // procedure.\r
+ int ossBufferBytes = *bufferSize * formatBytes( stream_.deviceFormat[mode] ) * deviceChannels;\r
+ if ( ossBufferBytes < 16 ) ossBufferBytes = 16;\r
+ int buffers = 0;\r
+ if ( options ) buffers = options->numberOfBuffers;\r
+ if ( options && options->flags & RTAUDIO_MINIMIZE_LATENCY ) buffers = 2;\r
+ if ( buffers < 2 ) buffers = 3;\r
+ temp = ((int) buffers << 16) + (int)( log10( (double)ossBufferBytes ) / log10( 2.0 ) );\r
+ result = ioctl( fd, SNDCTL_DSP_SETFRAGMENT, &temp );\r
+ if ( result == -1 ) {\r
+ close( fd );\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: error setting buffer size on device (" << ainfo.name << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ stream_.nBuffers = buffers;\r
+\r
+ // Save buffer size (in sample frames).\r
+ *bufferSize = ossBufferBytes / ( formatBytes(stream_.deviceFormat[mode]) * deviceChannels );\r
+ stream_.bufferSize = *bufferSize;\r
+\r
+ // Set the sample rate.\r
+ int srate = sampleRate;\r
+ result = ioctl( fd, SNDCTL_DSP_SPEED, &srate );\r
+ if ( result == -1 ) {\r
+ close( fd );\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: error setting sample rate (" << sampleRate << ") on device (" << ainfo.name << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+\r
+ // Verify the sample rate setup worked.\r
+ if ( abs( srate - sampleRate ) > 100 ) {\r
+ close( fd );\r
+ errorStream_ << "RtApiOss::probeDeviceOpen: device (" << ainfo.name << ") does not support sample rate (" << sampleRate << ").";\r
+ errorText_ = errorStream_.str();\r
+ return FAILURE;\r
+ }\r
+ stream_.sampleRate = sampleRate;\r
+\r
+ if ( mode == INPUT && stream_.mode == OUTPUT && stream_.device[0] == device) {\r
+ // We're doing duplex setup here.\r
+ stream_.deviceFormat[0] = stream_.deviceFormat[1];\r
+ stream_.nDeviceChannels[0] = deviceChannels;\r
+ }\r
+\r
+ // Set interleaving parameters.\r
+ stream_.userInterleaved = true;\r
+ stream_.deviceInterleaved[mode] = true;\r
+ if ( options && options->flags & RTAUDIO_NONINTERLEAVED )\r
+ stream_.userInterleaved = false;\r
+\r
+ // Set flags for buffer conversion\r
+ stream_.doConvertBuffer[mode] = false;\r
+ if ( stream_.userFormat != stream_.deviceFormat[mode] )\r
+ stream_.doConvertBuffer[mode] = true;\r
+ if ( stream_.nUserChannels[mode] < stream_.nDeviceChannels[mode] )\r
+ stream_.doConvertBuffer[mode] = true;\r
+ if ( stream_.userInterleaved != stream_.deviceInterleaved[mode] &&\r
+ stream_.nUserChannels[mode] > 1 )\r
+ stream_.doConvertBuffer[mode] = true;\r
+\r
+ // Allocate the stream handles if necessary and then save.\r
+ if ( stream_.apiHandle == 0 ) {\r
+ try {\r
+ handle = new OssHandle;\r
+ }\r
+ catch ( std::bad_alloc& ) {\r
+ errorText_ = "RtApiOss::probeDeviceOpen: error allocating OssHandle memory.";\r
+ goto error;\r
+ }\r
+\r
+ if ( pthread_cond_init( &handle->runnable, NULL ) ) {\r
+ errorText_ = "RtApiOss::probeDeviceOpen: error initializing pthread condition variable.";\r
+ goto error;\r
+ }\r
+\r
+ stream_.apiHandle = (void *) handle;\r
+ }\r
+ else {\r
+ handle = (OssHandle *) stream_.apiHandle;\r
+ }\r
+ handle->id[mode] = fd;\r
+\r
+ // Allocate necessary internal buffers.\r
+ unsigned long bufferBytes;\r
+ bufferBytes = stream_.nUserChannels[mode] * *bufferSize * formatBytes( stream_.userFormat );\r
+ stream_.userBuffer[mode] = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.userBuffer[mode] == NULL ) {\r
+ errorText_ = "RtApiOss::probeDeviceOpen: error allocating user buffer memory.";\r
+ goto error;\r
+ }\r
+\r
+ if ( stream_.doConvertBuffer[mode] ) {\r
+\r
+ bool makeBuffer = true;\r
+ bufferBytes = stream_.nDeviceChannels[mode] * formatBytes( stream_.deviceFormat[mode] );\r
+ if ( mode == INPUT ) {\r
+ if ( stream_.mode == OUTPUT && stream_.deviceBuffer ) {\r
+ unsigned long bytesOut = stream_.nDeviceChannels[0] * formatBytes( stream_.deviceFormat[0] );\r
+ if ( bufferBytes <= bytesOut ) makeBuffer = false;\r
+ }\r
+ }\r
+\r
+ if ( makeBuffer ) {\r
+ bufferBytes *= *bufferSize;\r
+ if ( stream_.deviceBuffer ) free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = (char *) calloc( bufferBytes, 1 );\r
+ if ( stream_.deviceBuffer == NULL ) {\r
+ errorText_ = "RtApiOss::probeDeviceOpen: error allocating device buffer memory.";\r
+ goto error;\r
+ }\r
+ }\r
+ }\r
+\r
+ stream_.device[mode] = device;\r
+ stream_.state = STREAM_STOPPED;\r
+\r
+ // Setup the buffer conversion information structure.\r
+ if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, firstChannel );\r
+\r
+ // Setup thread if necessary.\r
+ if ( stream_.mode == OUTPUT && mode == INPUT ) {\r
+ // We had already set up an output stream.\r
+ stream_.mode = DUPLEX;\r
+ if ( stream_.device[0] == device ) handle->id[0] = fd;\r
+ }\r
+ else {\r
+ stream_.mode = mode;\r
+\r
+ // Setup callback thread.\r
+ stream_.callbackInfo.object = (void *) this;\r
+\r
+ // Set the thread attributes for joinable and realtime scheduling\r
+ // priority. The higher priority will only take affect if the\r
+ // program is run as root or suid.\r
+ pthread_attr_t attr;\r
+ pthread_attr_init( &attr );\r
+ pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_JOINABLE );\r
+#ifdef SCHED_RR // Undefined with some OSes (eg: NetBSD 1.6.x with GNU Pthread)\r
+ if ( options && options->flags & RTAUDIO_SCHEDULE_REALTIME ) {\r
+ struct sched_param param;\r
+ int priority = options->priority;\r
+ int min = sched_get_priority_min( SCHED_RR );\r
+ int max = sched_get_priority_max( SCHED_RR );\r
+ if ( priority < min ) priority = min;\r
+ else if ( priority > max ) priority = max;\r
+ param.sched_priority = priority;\r
+ pthread_attr_setschedparam( &attr, ¶m );\r
+ pthread_attr_setschedpolicy( &attr, SCHED_RR );\r
+ }\r
+ else\r
+ pthread_attr_setschedpolicy( &attr, SCHED_OTHER );\r
+#else\r
+ pthread_attr_setschedpolicy( &attr, SCHED_OTHER );\r
+#endif\r
+\r
+ stream_.callbackInfo.isRunning = true;\r
+ result = pthread_create( &stream_.callbackInfo.thread, &attr, ossCallbackHandler, &stream_.callbackInfo );\r
+ pthread_attr_destroy( &attr );\r
+ if ( result ) {\r
+ stream_.callbackInfo.isRunning = false;\r
+ errorText_ = "RtApiOss::error creating callback thread!";\r
+ goto error;\r
+ }\r
+ }\r
+\r
+ return SUCCESS;\r
+\r
+ error:\r
+ if ( handle ) {\r
+ pthread_cond_destroy( &handle->runnable );\r
+ if ( handle->id[0] ) close( handle->id[0] );\r
+ if ( handle->id[1] ) close( handle->id[1] );\r
+ delete handle;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ return FAILURE;\r
+}\r
+\r
+void RtApiOss :: closeStream()\r
+{\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiOss::closeStream(): no open stream to close!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ OssHandle *handle = (OssHandle *) stream_.apiHandle;\r
+ stream_.callbackInfo.isRunning = false;\r
+ MUTEX_LOCK( &stream_.mutex );\r
+ if ( stream_.state == STREAM_STOPPED )\r
+ pthread_cond_signal( &handle->runnable );\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ pthread_join( stream_.callbackInfo.thread, NULL );\r
+\r
+ if ( stream_.state == STREAM_RUNNING ) {\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX )\r
+ ioctl( handle->id[0], SNDCTL_DSP_HALT, 0 );\r
+ else\r
+ ioctl( handle->id[1], SNDCTL_DSP_HALT, 0 );\r
+ stream_.state = STREAM_STOPPED;\r
+ }\r
+\r
+ if ( handle ) {\r
+ pthread_cond_destroy( &handle->runnable );\r
+ if ( handle->id[0] ) close( handle->id[0] );\r
+ if ( handle->id[1] ) close( handle->id[1] );\r
+ delete handle;\r
+ stream_.apiHandle = 0;\r
+ }\r
+\r
+ for ( int i=0; i<2; i++ ) {\r
+ if ( stream_.userBuffer[i] ) {\r
+ free( stream_.userBuffer[i] );\r
+ stream_.userBuffer[i] = 0;\r
+ }\r
+ }\r
+\r
+ if ( stream_.deviceBuffer ) {\r
+ free( stream_.deviceBuffer );\r
+ stream_.deviceBuffer = 0;\r
+ }\r
+\r
+ stream_.mode = UNINITIALIZED;\r
+ stream_.state = STREAM_CLOSED;\r
+}\r
+\r
+void RtApiOss :: startStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_RUNNING ) {\r
+ errorText_ = "RtApiOss::startStream(): the stream is already running!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ stream_.state = STREAM_RUNNING;\r
+\r
+ // No need to do anything else here ... OSS automatically starts\r
+ // when fed samples.\r
+\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ OssHandle *handle = (OssHandle *) stream_.apiHandle;\r
+ pthread_cond_signal( &handle->runnable );\r
+}\r
+\r
+void RtApiOss :: stopStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiOss::stopStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ // The state might change while waiting on a mutex.\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return;\r
+ }\r
+\r
+ int result = 0;\r
+ OssHandle *handle = (OssHandle *) stream_.apiHandle;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+\r
+ // Flush the output with zeros a few times.\r
+ char *buffer;\r
+ int samples;\r
+ RtAudioFormat format;\r
+\r
+ if ( stream_.doConvertBuffer[0] ) {\r
+ buffer = stream_.deviceBuffer;\r
+ samples = stream_.bufferSize * stream_.nDeviceChannels[0];\r
+ format = stream_.deviceFormat[0];\r
+ }\r
+ else {\r
+ buffer = stream_.userBuffer[0];\r
+ samples = stream_.bufferSize * stream_.nUserChannels[0];\r
+ format = stream_.userFormat;\r
+ }\r
+\r
+ memset( buffer, 0, samples * formatBytes(format) );\r
+ for ( unsigned int i=0; i<stream_.nBuffers+1; i++ ) {\r
+ result = write( handle->id[0], buffer, samples * formatBytes(format) );\r
+ if ( result == -1 ) {\r
+ errorText_ = "RtApiOss::stopStream: audio write error.";\r
+ error( RtError::WARNING );\r
+ }\r
+ }\r
+\r
+ result = ioctl( handle->id[0], SNDCTL_DSP_HALT, 0 );\r
+ if ( result == -1 ) {\r
+ errorStream_ << "RtApiOss::stopStream: system error stopping callback procedure on device (" << stream_.device[0] << ").";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ handle->triggered = false;\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || ( stream_.mode == DUPLEX && handle->id[0] != handle->id[1] ) ) {\r
+ result = ioctl( handle->id[1], SNDCTL_DSP_HALT, 0 );\r
+ if ( result == -1 ) {\r
+ errorStream_ << "RtApiOss::stopStream: system error stopping input callback procedure on device (" << stream_.device[0] << ").";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ unlock:\r
+ stream_.state = STREAM_STOPPED;\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ if ( result != -1 ) return;\r
+ error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiOss :: abortStream()\r
+{\r
+ verifyStream();\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ errorText_ = "RtApiOss::abortStream(): the stream is already stopped!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ // The state might change while waiting on a mutex.\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return;\r
+ }\r
+\r
+ int result = 0;\r
+ OssHandle *handle = (OssHandle *) stream_.apiHandle;\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+ result = ioctl( handle->id[0], SNDCTL_DSP_HALT, 0 );\r
+ if ( result == -1 ) {\r
+ errorStream_ << "RtApiOss::abortStream: system error stopping callback procedure on device (" << stream_.device[0] << ").";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ handle->triggered = false;\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || ( stream_.mode == DUPLEX && handle->id[0] != handle->id[1] ) ) {\r
+ result = ioctl( handle->id[1], SNDCTL_DSP_HALT, 0 );\r
+ if ( result == -1 ) {\r
+ errorStream_ << "RtApiOss::abortStream: system error stopping input callback procedure on device (" << stream_.device[0] << ").";\r
+ errorText_ = errorStream_.str();\r
+ goto unlock;\r
+ }\r
+ }\r
+\r
+ unlock:\r
+ stream_.state = STREAM_STOPPED;\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ if ( result != -1 ) return;\r
+ error( RtError::SYSTEM_ERROR );\r
+}\r
+\r
+void RtApiOss :: callbackEvent()\r
+{\r
+ OssHandle *handle = (OssHandle *) stream_.apiHandle;\r
+ if ( stream_.state == STREAM_STOPPED ) {\r
+ MUTEX_LOCK( &stream_.mutex );\r
+ pthread_cond_wait( &handle->runnable, &stream_.mutex );\r
+ if ( stream_.state != STREAM_RUNNING ) {\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ return;\r
+ }\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+ }\r
+\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApiOss::callbackEvent(): the stream is closed ... this shouldn't happen!";\r
+ error( RtError::WARNING );\r
+ return;\r
+ }\r
+\r
+ // Invoke user callback to get fresh output data.\r
+ int doStopStream = 0;\r
+ RtAudioCallback callback = (RtAudioCallback) stream_.callbackInfo.callback;\r
+ double streamTime = getStreamTime();\r
+ RtAudioStreamStatus status = 0;\r
+ if ( stream_.mode != INPUT && handle->xrun[0] == true ) {\r
+ status |= RTAUDIO_OUTPUT_UNDERFLOW;\r
+ handle->xrun[0] = false;\r
+ }\r
+ if ( stream_.mode != OUTPUT && handle->xrun[1] == true ) {\r
+ status |= RTAUDIO_INPUT_OVERFLOW;\r
+ handle->xrun[1] = false;\r
+ }\r
+ doStopStream = callback( stream_.userBuffer[0], stream_.userBuffer[1],\r
+ stream_.bufferSize, streamTime, status, stream_.callbackInfo.userData );\r
+ if ( doStopStream == 2 ) {\r
+ this->abortStream();\r
+ return;\r
+ }\r
+\r
+ MUTEX_LOCK( &stream_.mutex );\r
+\r
+ // The state might change while waiting on a mutex.\r
+ if ( stream_.state == STREAM_STOPPED ) goto unlock;\r
+\r
+ int result;\r
+ char *buffer;\r
+ int samples;\r
+ RtAudioFormat format;\r
+\r
+ if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {\r
+\r
+ // Setup parameters and do buffer conversion if necessary.\r
+ if ( stream_.doConvertBuffer[0] ) {\r
+ buffer = stream_.deviceBuffer;\r
+ convertBuffer( buffer, stream_.userBuffer[0], stream_.convertInfo[0] );\r
+ samples = stream_.bufferSize * stream_.nDeviceChannels[0];\r
+ format = stream_.deviceFormat[0];\r
+ }\r
+ else {\r
+ buffer = stream_.userBuffer[0];\r
+ samples = stream_.bufferSize * stream_.nUserChannels[0];\r
+ format = stream_.userFormat;\r
+ }\r
+\r
+ // Do byte swapping if necessary.\r
+ if ( stream_.doByteSwap[0] )\r
+ byteSwapBuffer( buffer, samples, format );\r
+\r
+ if ( stream_.mode == DUPLEX && handle->triggered == false ) {\r
+ int trig = 0;\r
+ ioctl( handle->id[0], SNDCTL_DSP_SETTRIGGER, &trig );\r
+ result = write( handle->id[0], buffer, samples * formatBytes(format) );\r
+ trig = PCM_ENABLE_INPUT|PCM_ENABLE_OUTPUT;\r
+ ioctl( handle->id[0], SNDCTL_DSP_SETTRIGGER, &trig );\r
+ handle->triggered = true;\r
+ }\r
+ else\r
+ // Write samples to device.\r
+ result = write( handle->id[0], buffer, samples * formatBytes(format) );\r
+\r
+ if ( result == -1 ) {\r
+ // We'll assume this is an underrun, though there isn't a\r
+ // specific means for determining that.\r
+ handle->xrun[0] = true;\r
+ errorText_ = "RtApiOss::callbackEvent: audio write error.";\r
+ error( RtError::WARNING );\r
+ // Continue on to input section.\r
+ }\r
+ }\r
+\r
+ if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {\r
+\r
+ // Setup parameters.\r
+ if ( stream_.doConvertBuffer[1] ) {\r
+ buffer = stream_.deviceBuffer;\r
+ samples = stream_.bufferSize * stream_.nDeviceChannels[1];\r
+ format = stream_.deviceFormat[1];\r
+ }\r
+ else {\r
+ buffer = stream_.userBuffer[1];\r
+ samples = stream_.bufferSize * stream_.nUserChannels[1];\r
+ format = stream_.userFormat;\r
+ }\r
+\r
+ // Read samples from device.\r
+ result = read( handle->id[1], buffer, samples * formatBytes(format) );\r
+\r
+ if ( result == -1 ) {\r
+ // We'll assume this is an overrun, though there isn't a\r
+ // specific means for determining that.\r
+ handle->xrun[1] = true;\r
+ errorText_ = "RtApiOss::callbackEvent: audio read error.";\r
+ error( RtError::WARNING );\r
+ goto unlock;\r
+ }\r
+\r
+ // Do byte swapping if necessary.\r
+ if ( stream_.doByteSwap[1] )\r
+ byteSwapBuffer( buffer, samples, format );\r
+\r
+ // Do buffer conversion if necessary.\r
+ if ( stream_.doConvertBuffer[1] )\r
+ convertBuffer( stream_.userBuffer[1], stream_.deviceBuffer, stream_.convertInfo[1] );\r
+ }\r
+\r
+ unlock:\r
+ MUTEX_UNLOCK( &stream_.mutex );\r
+\r
+ RtApi::tickStreamTime();\r
+ if ( doStopStream == 1 ) this->stopStream();\r
+}\r
+\r
+extern "C" void *ossCallbackHandler( void *ptr )\r
+{\r
+ CallbackInfo *info = (CallbackInfo *) ptr;\r
+ RtApiOss *object = (RtApiOss *) info->object;\r
+ bool *isRunning = &info->isRunning;\r
+\r
+ while ( *isRunning == true ) {\r
+ pthread_testcancel();\r
+ object->callbackEvent();\r
+ }\r
+\r
+ pthread_exit( NULL );\r
+}\r
+\r
+//******************** End of __LINUX_OSS__ *********************//\r
+#endif\r
+\r
+\r
+// *************************************************** //\r
+//\r
+// Protected common (OS-independent) RtAudio methods.\r
+//\r
+// *************************************************** //\r
+\r
+// This method can be modified to control the behavior of error\r
+// message printing.\r
+void RtApi :: error( RtError::Type type )\r
+{\r
+ errorStream_.str(""); // clear the ostringstream\r
+ if ( type == RtError::WARNING && showWarnings_ == true )\r
+ std::cerr << '\n' << errorText_ << "\n\n";\r
+ else if ( type != RtError::WARNING )\r
+ throw( RtError( errorText_, type ) );\r
+}\r
+\r
+void RtApi :: verifyStream()\r
+{\r
+ if ( stream_.state == STREAM_CLOSED ) {\r
+ errorText_ = "RtApi:: a stream is not open!";\r
+ error( RtError::INVALID_USE );\r
+ }\r
+}\r
+\r
+void RtApi :: clearStreamInfo()\r
+{\r
+ stream_.mode = UNINITIALIZED;\r
+ stream_.state = STREAM_CLOSED;\r
+ stream_.sampleRate = 0;\r
+ stream_.bufferSize = 0;\r
+ stream_.nBuffers = 0;\r
+ stream_.userFormat = 0;\r
+ stream_.userInterleaved = true;\r
+ stream_.streamTime = 0.0;\r
+ stream_.apiHandle = 0;\r
+ stream_.deviceBuffer = 0;\r
+ stream_.callbackInfo.callback = 0;\r
+ stream_.callbackInfo.userData = 0;\r
+ stream_.callbackInfo.isRunning = false;\r
+ for ( int i=0; i<2; i++ ) {\r
+ stream_.device[i] = 11111;\r
+ stream_.doConvertBuffer[i] = false;\r
+ stream_.deviceInterleaved[i] = true;\r
+ stream_.doByteSwap[i] = false;\r
+ stream_.nUserChannels[i] = 0;\r
+ stream_.nDeviceChannels[i] = 0;\r
+ stream_.channelOffset[i] = 0;\r
+ stream_.deviceFormat[i] = 0;\r
+ stream_.latency[i] = 0;\r
+ stream_.userBuffer[i] = 0;\r
+ stream_.convertInfo[i].channels = 0;\r
+ stream_.convertInfo[i].inJump = 0;\r
+ stream_.convertInfo[i].outJump = 0;\r
+ stream_.convertInfo[i].inFormat = 0;\r
+ stream_.convertInfo[i].outFormat = 0;\r
+ stream_.convertInfo[i].inOffset.clear();\r
+ stream_.convertInfo[i].outOffset.clear();\r
+ }\r
+}\r
+\r
+unsigned int RtApi :: formatBytes( RtAudioFormat format )\r
+{\r
+ if ( format == RTAUDIO_SINT16 )\r
+ return 2;\r
+ else if ( format == RTAUDIO_SINT24 || format == RTAUDIO_SINT32 ||\r
+ format == RTAUDIO_FLOAT32 )\r
+ return 4;\r
+ else if ( format == RTAUDIO_FLOAT64 )\r
+ return 8;\r
+ else if ( format == RTAUDIO_SINT8 )\r
+ return 1;\r
+\r
+ errorText_ = "RtApi::formatBytes: undefined format.";\r
+ error( RtError::WARNING );\r
+\r
+ return 0;\r
+}\r
+\r
+void RtApi :: setConvertInfo( StreamMode mode, unsigned int firstChannel )\r
+{\r
+ if ( mode == INPUT ) { // convert device to user buffer\r
+ stream_.convertInfo[mode].inJump = stream_.nDeviceChannels[1];\r
+ stream_.convertInfo[mode].outJump = stream_.nUserChannels[1];\r
+ stream_.convertInfo[mode].inFormat = stream_.deviceFormat[1];\r
+ stream_.convertInfo[mode].outFormat = stream_.userFormat;\r
+ }\r
+ else { // convert user to device buffer\r
+ stream_.convertInfo[mode].inJump = stream_.nUserChannels[0];\r
+ stream_.convertInfo[mode].outJump = stream_.nDeviceChannels[0];\r
+ stream_.convertInfo[mode].inFormat = stream_.userFormat;\r
+ stream_.convertInfo[mode].outFormat = stream_.deviceFormat[0];\r
+ }\r
+\r
+ if ( stream_.convertInfo[mode].inJump < stream_.convertInfo[mode].outJump )\r
+ stream_.convertInfo[mode].channels = stream_.convertInfo[mode].inJump;\r
+ else\r
+ stream_.convertInfo[mode].channels = stream_.convertInfo[mode].outJump;\r
+\r
+ // Set up the interleave/deinterleave offsets.\r
+ if ( stream_.deviceInterleaved[mode] != stream_.userInterleaved ) {\r
+ if ( ( mode == OUTPUT && stream_.deviceInterleaved[mode] ) ||\r
+ ( mode == INPUT && stream_.userInterleaved ) ) {\r
+ for ( int k=0; k<stream_.convertInfo[mode].channels; k++ ) {\r
+ stream_.convertInfo[mode].inOffset.push_back( k * stream_.bufferSize );\r
+ stream_.convertInfo[mode].outOffset.push_back( k );\r
+ stream_.convertInfo[mode].inJump = 1;\r
+ }\r
+ }\r
+ else {\r
+ for ( int k=0; k<stream_.convertInfo[mode].channels; k++ ) {\r
+ stream_.convertInfo[mode].inOffset.push_back( k );\r
+ stream_.convertInfo[mode].outOffset.push_back( k * stream_.bufferSize );\r
+ stream_.convertInfo[mode].outJump = 1;\r
+ }\r
+ }\r
+ }\r
+ else { // no (de)interleaving\r
+ if ( stream_.userInterleaved ) {\r
+ for ( int k=0; k<stream_.convertInfo[mode].channels; k++ ) {\r
+ stream_.convertInfo[mode].inOffset.push_back( k );\r
+ stream_.convertInfo[mode].outOffset.push_back( k );\r
+ }\r
+ }\r
+ else {\r
+ for ( int k=0; k<stream_.convertInfo[mode].channels; k++ ) {\r
+ stream_.convertInfo[mode].inOffset.push_back( k * stream_.bufferSize );\r
+ stream_.convertInfo[mode].outOffset.push_back( k * stream_.bufferSize );\r
+ stream_.convertInfo[mode].inJump = 1;\r
+ stream_.convertInfo[mode].outJump = 1;\r
+ }\r
+ }\r
+ }\r
+\r
+ // Add channel offset.\r
+ if ( firstChannel > 0 ) {\r
+ if ( stream_.deviceInterleaved[mode] ) {\r
+ if ( mode == OUTPUT ) {\r
+ for ( int k=0; k<stream_.convertInfo[mode].channels; k++ )\r
+ stream_.convertInfo[mode].outOffset[k] += firstChannel;\r
+ }\r
+ else {\r
+ for ( int k=0; k<stream_.convertInfo[mode].channels; k++ )\r
+ stream_.convertInfo[mode].inOffset[k] += firstChannel;\r
+ }\r
+ }\r
+ else {\r
+ if ( mode == OUTPUT ) {\r
+ for ( int k=0; k<stream_.convertInfo[mode].channels; k++ )\r
+ stream_.convertInfo[mode].outOffset[k] += ( firstChannel * stream_.bufferSize );\r
+ }\r
+ else {\r
+ for ( int k=0; k<stream_.convertInfo[mode].channels; k++ )\r
+ stream_.convertInfo[mode].inOffset[k] += ( firstChannel * stream_.bufferSize );\r
+ }\r
+ }\r
+ }\r
+}\r
+\r
+void RtApi :: convertBuffer( char *outBuffer, char *inBuffer, ConvertInfo &info )\r
+{\r
+ // This function does format conversion, input/output channel compensation, and\r
+ // data interleaving/deinterleaving. 24-bit integers are assumed to occupy\r
+ // the lower three bytes of a 32-bit integer.\r
+\r
+ // Clear our device buffer when in/out duplex device channels are different\r
+ if ( outBuffer == stream_.deviceBuffer && stream_.mode == DUPLEX &&\r
+ ( stream_.nDeviceChannels[0] < stream_.nDeviceChannels[1] ) )\r
+ memset( outBuffer, 0, stream_.bufferSize * info.outJump * formatBytes( info.outFormat ) );\r
+\r
+ int j;\r
+ if (info.outFormat == RTAUDIO_FLOAT64) {\r
+ Float64 scale;\r
+ Float64 *out = (Float64 *)outBuffer;\r
+\r
+ if (info.inFormat == RTAUDIO_SINT8) {\r
+ signed char *in = (signed char *)inBuffer;\r
+ scale = 1.0 / 127.5;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Float64) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] += 0.5;\r
+ out[info.outOffset[j]] *= scale;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT16) {\r
+ Int16 *in = (Int16 *)inBuffer;\r
+ scale = 1.0 / 32767.5;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Float64) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] += 0.5;\r
+ out[info.outOffset[j]] *= scale;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT24) {\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ scale = 1.0 / 8388607.5;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Float64) (in[info.inOffset[j]] & 0x00ffffff);\r
+ out[info.outOffset[j]] += 0.5;\r
+ out[info.outOffset[j]] *= scale;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT32) {\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ scale = 1.0 / 2147483647.5;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Float64) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] += 0.5;\r
+ out[info.outOffset[j]] *= scale;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT32) {\r
+ Float32 *in = (Float32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Float64) in[info.inOffset[j]];\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT64) {\r
+ // Channel compensation and/or (de)interleaving only.\r
+ Float64 *in = (Float64 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = in[info.inOffset[j]];\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ }\r
+ else if (info.outFormat == RTAUDIO_FLOAT32) {\r
+ Float32 scale;\r
+ Float32 *out = (Float32 *)outBuffer;\r
+\r
+ if (info.inFormat == RTAUDIO_SINT8) {\r
+ signed char *in = (signed char *)inBuffer;\r
+ scale = (Float32) ( 1.0 / 127.5 );\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Float32) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] += 0.5;\r
+ out[info.outOffset[j]] *= scale;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT16) {\r
+ Int16 *in = (Int16 *)inBuffer;\r
+ scale = (Float32) ( 1.0 / 32767.5 );\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Float32) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] += 0.5;\r
+ out[info.outOffset[j]] *= scale;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT24) {\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ scale = (Float32) ( 1.0 / 8388607.5 );\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Float32) (in[info.inOffset[j]] & 0x00ffffff);\r
+ out[info.outOffset[j]] += 0.5;\r
+ out[info.outOffset[j]] *= scale;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT32) {\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ scale = (Float32) ( 1.0 / 2147483647.5 );\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Float32) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] += 0.5;\r
+ out[info.outOffset[j]] *= scale;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT32) {\r
+ // Channel compensation and/or (de)interleaving only.\r
+ Float32 *in = (Float32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = in[info.inOffset[j]];\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT64) {\r
+ Float64 *in = (Float64 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Float32) in[info.inOffset[j]];\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ }\r
+ else if (info.outFormat == RTAUDIO_SINT32) {\r
+ Int32 *out = (Int32 *)outBuffer;\r
+ if (info.inFormat == RTAUDIO_SINT8) {\r
+ signed char *in = (signed char *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] <<= 24;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT16) {\r
+ Int16 *in = (Int16 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] <<= 16;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT24) { // Hmmm ... we could just leave it in the lower 3 bytes\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] <<= 8;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT32) {\r
+ // Channel compensation and/or (de)interleaving only.\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = in[info.inOffset[j]];\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT32) {\r
+ Float32 *in = (Float32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int32) (in[info.inOffset[j]] * 2147483647.5 - 0.5);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT64) {\r
+ Float64 *in = (Float64 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int32) (in[info.inOffset[j]] * 2147483647.5 - 0.5);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ }\r
+ else if (info.outFormat == RTAUDIO_SINT24) {\r
+ Int32 *out = (Int32 *)outBuffer;\r
+ if (info.inFormat == RTAUDIO_SINT8) {\r
+ signed char *in = (signed char *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] <<= 16;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT16) {\r
+ Int16 *in = (Int16 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] <<= 8;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT24) {\r
+ // Channel compensation and/or (de)interleaving only.\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = in[info.inOffset[j]];\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT32) {\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int32) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] >>= 8;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT32) {\r
+ Float32 *in = (Float32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int32) (in[info.inOffset[j]] * 8388607.5 - 0.5);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT64) {\r
+ Float64 *in = (Float64 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int32) (in[info.inOffset[j]] * 8388607.5 - 0.5);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ }\r
+ else if (info.outFormat == RTAUDIO_SINT16) {\r
+ Int16 *out = (Int16 *)outBuffer;\r
+ if (info.inFormat == RTAUDIO_SINT8) {\r
+ signed char *in = (signed char *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int16) in[info.inOffset[j]];\r
+ out[info.outOffset[j]] <<= 8;\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT16) {\r
+ // Channel compensation and/or (de)interleaving only.\r
+ Int16 *in = (Int16 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = in[info.inOffset[j]];\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT24) {\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int16) ((in[info.inOffset[j]] >> 8) & 0x0000ffff);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT32) {\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int16) ((in[info.inOffset[j]] >> 16) & 0x0000ffff);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT32) {\r
+ Float32 *in = (Float32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int16) (in[info.inOffset[j]] * 32767.5 - 0.5);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT64) {\r
+ Float64 *in = (Float64 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (Int16) (in[info.inOffset[j]] * 32767.5 - 0.5);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ }\r
+ else if (info.outFormat == RTAUDIO_SINT8) {\r
+ signed char *out = (signed char *)outBuffer;\r
+ if (info.inFormat == RTAUDIO_SINT8) {\r
+ // Channel compensation and/or (de)interleaving only.\r
+ signed char *in = (signed char *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = in[info.inOffset[j]];\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ if (info.inFormat == RTAUDIO_SINT16) {\r
+ Int16 *in = (Int16 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (signed char) ((in[info.inOffset[j]] >> 8) & 0x00ff);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT24) {\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (signed char) ((in[info.inOffset[j]] >> 16) & 0x000000ff);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_SINT32) {\r
+ Int32 *in = (Int32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (signed char) ((in[info.inOffset[j]] >> 24) & 0x000000ff);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT32) {\r
+ Float32 *in = (Float32 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (signed char) (in[info.inOffset[j]] * 127.5 - 0.5);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ else if (info.inFormat == RTAUDIO_FLOAT64) {\r
+ Float64 *in = (Float64 *)inBuffer;\r
+ for (unsigned int i=0; i<stream_.bufferSize; i++) {\r
+ for (j=0; j<info.channels; j++) {\r
+ out[info.outOffset[j]] = (signed char) (in[info.inOffset[j]] * 127.5 - 0.5);\r
+ }\r
+ in += info.inJump;\r
+ out += info.outJump;\r
+ }\r
+ }\r
+ }\r
+}\r
+\r
+ //static inline uint16_t bswap_16(uint16_t x) { return (x>>8) | (x<<8); }\r
+ //static inline uint32_t bswap_32(uint32_t x) { return (bswap_16(x&0xffff)<<16) | (bswap_16(x>>16)); }\r
+ //static inline uint64_t bswap_64(uint64_t x) { return (((unsigned long long)bswap_32(x&0xffffffffull))<<32) | (bswap_32(x>>32)); }\r
+\r
+void RtApi :: byteSwapBuffer( char *buffer, unsigned int samples, RtAudioFormat format )\r
+{\r
+ register char val;\r
+ register char *ptr;\r
+\r
+ ptr = buffer;\r
+ if ( format == RTAUDIO_SINT16 ) {\r
+ for ( unsigned int i=0; i<samples; i++ ) {\r
+ // Swap 1st and 2nd bytes.\r
+ val = *(ptr);\r
+ *(ptr) = *(ptr+1);\r
+ *(ptr+1) = val;\r
+\r
+ // Increment 2 bytes.\r
+ ptr += 2;\r
+ }\r
+ }\r
+ else if ( format == RTAUDIO_SINT24 ||\r
+ format == RTAUDIO_SINT32 ||\r
+ format == RTAUDIO_FLOAT32 ) {\r
+ for ( unsigned int i=0; i<samples; i++ ) {\r
+ // Swap 1st and 4th bytes.\r
+ val = *(ptr);\r
+ *(ptr) = *(ptr+3);\r
+ *(ptr+3) = val;\r
+\r
+ // Swap 2nd and 3rd bytes.\r
+ ptr += 1;\r
+ val = *(ptr);\r
+ *(ptr) = *(ptr+1);\r
+ *(ptr+1) = val;\r
+\r
+ // Increment 3 more bytes.\r
+ ptr += 3;\r
+ }\r
+ }\r
+ else if ( format == RTAUDIO_FLOAT64 ) {\r
+ for ( unsigned int i=0; i<samples; i++ ) {\r
+ // Swap 1st and 8th bytes\r
+ val = *(ptr);\r
+ *(ptr) = *(ptr+7);\r
+ *(ptr+7) = val;\r
+\r
+ // Swap 2nd and 7th bytes\r
+ ptr += 1;\r
+ val = *(ptr);\r
+ *(ptr) = *(ptr+5);\r
+ *(ptr+5) = val;\r
+\r
+ // Swap 3rd and 6th bytes\r
+ ptr += 1;\r
+ val = *(ptr);\r
+ *(ptr) = *(ptr+3);\r
+ *(ptr+3) = val;\r
+\r
+ // Swap 4th and 5th bytes\r
+ ptr += 1;\r
+ val = *(ptr);\r
+ *(ptr) = *(ptr+1);\r
+ *(ptr+1) = val;\r
+\r
+ // Increment 5 more bytes.\r
+ ptr += 5;\r
+ }\r
+ }\r
+}\r
+\r
+ // Indentation settings for Vim and Emacs\r
+ //\r
+ // Local Variables:\r
+ // c-basic-offset: 2\r
+ // indent-tabs-mode: nil\r
+ // End:\r
+ //\r
+ // vim: et sts=2 sw=2\r
+\r
projects / rtaudio.git / commitdiff