--- /dev/null
+/*
+ * Copyright (C) 2015-2015 Robin Gareus <robin@gareus.org>
+ * Copyright (C) 2013 Paul Davis
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <regex.h>
+
+#ifndef PLATFORM_WINDOWS
+#include <sys/mman.h>
+#include <sys/time.h>
+#endif
+
+#include <glibmm.h>
+
+#include "portaudio_backend.h"
+#include "rt_thread.h"
+
+#include "pbd/compose.h"
+#include "pbd/error.h"
+#include "pbd/file_utils.h"
+#include "ardour/filesystem_paths.h"
+#include "ardour/port_manager.h"
+#include "i18n.h"
+
+using namespace ARDOUR;
+
+static std::string s_instance_name;
+size_t PortAudioBackend::_max_buffer_size = 8192;
+std::vector<std::string> PortAudioBackend::_midi_options;
+std::vector<AudioBackend::DeviceStatus> PortAudioBackend::_audio_device_status;
+
+PortAudioBackend::PortAudioBackend (AudioEngine& e, AudioBackendInfo& info)
+ : AudioBackend (e, info)
+ , _pcmio (0)
+ , _run (false)
+ , _active (false)
+ , _freewheel (false)
+ , _measure_latency (false)
+ , _last_process_start (0)
+ , _audio_device("")
+ , _midi_driver_option(_("None"))
+ , _samplerate (48000)
+ , _samples_per_period (1024)
+ , _n_inputs (0)
+ , _n_outputs (0)
+ , _systemic_audio_input_latency (0)
+ , _systemic_audio_output_latency (0)
+ , _dsp_load (0)
+ , _processed_samples (0)
+ , _port_change_flag (false)
+{
+ _instance_name = s_instance_name;
+ pthread_mutex_init (&_port_callback_mutex, 0);
+
+ _pcmio = new PortAudioIO ();
+}
+
+PortAudioBackend::~PortAudioBackend ()
+{
+ delete _pcmio; _pcmio = 0;
+ pthread_mutex_destroy (&_port_callback_mutex);
+}
+
+/* AUDIOBACKEND API */
+
+std::string
+PortAudioBackend::name () const
+{
+ return X_("PortAudio");
+}
+
+bool
+PortAudioBackend::is_realtime () const
+{
+ return true;
+}
+
+std::vector<AudioBackend::DeviceStatus>
+PortAudioBackend::enumerate_devices () const
+{
+ _pcmio->discover();
+ _audio_device_status.clear();
+ std::map<int, std::string> devices;
+ _pcmio->device_list(devices);
+
+ for (std::map<int, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
+ if (_audio_device == "") _audio_device = i->second;
+ _audio_device_status.push_back (DeviceStatus (i->second, true));
+ }
+ return _audio_device_status;
+}
+
+std::vector<float>
+PortAudioBackend::available_sample_rates (const std::string&) const
+{
+ std::vector<float> sr;
+ _pcmio->available_sample_rates(name_to_id(_audio_device), sr);
+ return sr;
+}
+
+std::vector<uint32_t>
+PortAudioBackend::available_buffer_sizes (const std::string&) const
+{
+ std::vector<uint32_t> bs;
+ _pcmio->available_buffer_sizes(name_to_id(_audio_device), bs);
+ return bs;
+}
+
+uint32_t
+PortAudioBackend::available_input_channel_count (const std::string&) const
+{
+ return 128; // TODO query current device
+}
+
+uint32_t
+PortAudioBackend::available_output_channel_count (const std::string&) const
+{
+ return 128; // TODO query current device
+}
+
+bool
+PortAudioBackend::can_change_sample_rate_when_running () const
+{
+ return false;
+}
+
+bool
+PortAudioBackend::can_change_buffer_size_when_running () const
+{
+ return false; // TODO
+}
+
+int
+PortAudioBackend::set_device_name (const std::string& d)
+{
+ _audio_device = d;
+ return 0;
+}
+
+int
+PortAudioBackend::set_sample_rate (float sr)
+{
+ if (sr <= 0) { return -1; }
+ // TODO check if it's in the list of valid SR
+ _samplerate = sr;
+ engine.sample_rate_change (sr);
+ return 0;
+}
+
+int
+PortAudioBackend::set_buffer_size (uint32_t bs)
+{
+ if (bs <= 0 || bs >= _max_buffer_size) {
+ return -1;
+ }
+ _samples_per_period = bs;
+ engine.buffer_size_change (bs);
+ return 0;
+}
+
+int
+PortAudioBackend::set_interleaved (bool yn)
+{
+ if (!yn) { return 0; }
+ return -1;
+}
+
+int
+PortAudioBackend::set_input_channels (uint32_t cc)
+{
+ _n_inputs = cc;
+ return 0;
+}
+
+int
+PortAudioBackend::set_output_channels (uint32_t cc)
+{
+ _n_outputs = cc;
+ return 0;
+}
+
+int
+PortAudioBackend::set_systemic_input_latency (uint32_t sl)
+{
+ _systemic_audio_input_latency = sl;
+ return 0;
+}
+
+int
+PortAudioBackend::set_systemic_output_latency (uint32_t sl)
+{
+ _systemic_audio_output_latency = sl;
+ return 0;
+}
+
+/* Retrieving parameters */
+std::string
+PortAudioBackend::device_name () const
+{
+ return _audio_device;
+}
+
+float
+PortAudioBackend::sample_rate () const
+{
+ return _samplerate;
+}
+
+uint32_t
+PortAudioBackend::buffer_size () const
+{
+ return _samples_per_period;
+}
+
+bool
+PortAudioBackend::interleaved () const
+{
+ return false;
+}
+
+uint32_t
+PortAudioBackend::input_channels () const
+{
+ return _n_inputs;
+}
+
+uint32_t
+PortAudioBackend::output_channels () const
+{
+ return _n_outputs;
+}
+
+uint32_t
+PortAudioBackend::systemic_input_latency () const
+{
+ return _systemic_audio_input_latency;
+}
+
+uint32_t
+PortAudioBackend::systemic_output_latency () const
+{
+ return _systemic_audio_output_latency;
+}
+
+/* MIDI */
+
+std::vector<std::string>
+PortAudioBackend::enumerate_midi_options () const
+{
+ if (_midi_options.empty()) {
+ //_midi_options.push_back (_("PortMidi"));
+ _midi_options.push_back (_("None"));
+ }
+ return _midi_options;
+}
+
+int
+PortAudioBackend::set_midi_option (const std::string& opt)
+{
+ if (opt != _("None") /* && opt != _("PortMidi")*/) {
+ return -1;
+ }
+ _midi_driver_option = opt;
+ return 0;
+}
+
+std::string
+PortAudioBackend::midi_option () const
+{
+ return _midi_driver_option;
+}
+
+/* State Control */
+
+static void * pthread_process (void *arg)
+{
+ PortAudioBackend *d = static_cast<PortAudioBackend *>(arg);
+ d->main_process_thread ();
+ pthread_exit (0);
+ return 0;
+}
+
+int
+PortAudioBackend::_start (bool for_latency_measurement)
+{
+ if (!_active && _run) {
+ // recover from 'halted', reap threads
+ stop();
+ }
+
+ if (_active || _run) {
+ PBD::error << _("PortAudioBackend: already active.") << endmsg;
+ return -1;
+ }
+
+ if (_ports.size()) {
+ PBD::warning << _("PortAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
+ _system_inputs.clear();
+ _system_outputs.clear();
+ _system_midi_in.clear();
+ _system_midi_out.clear();
+ _ports.clear();
+ }
+
+ /* reset internal state */
+ _dsp_load = 0;
+ _freewheeling = false;
+ _freewheel = false;
+ _last_process_start = 0;
+
+ _pcmio->pcm_setup (name_to_id(_audio_device), name_to_id(_audio_device), _samplerate, _samples_per_period);
+
+ switch (_pcmio->state ()) {
+ case 0: /* OK */ break;
+ case -1: PBD::error << _("PortAudioBackend: failed to open device.") << endmsg; break;
+ default: PBD::error << _("PortAudioBackend: initialization failed.") << endmsg; break;
+ }
+ if (_pcmio->state ()) {
+ return -1;
+ }
+
+ if (_n_outputs != _pcmio->n_playback_channels ()) {
+ _n_outputs = _pcmio->n_playback_channels ();
+ PBD::info << _("PortAudioBackend: adjusted output channel count to match device.") << endmsg;
+ }
+
+ if (_n_inputs != _pcmio->n_capture_channels ()) {
+ _n_inputs = _pcmio->n_capture_channels ();
+ PBD::info << _("PortAudioBackend: adjusted input channel count to match device.") << endmsg;
+ }
+#if 0
+ if (_pcmio->samples_per_period() != _samples_per_period) {
+ _samples_per_period = _pcmio->samples_per_period();
+ PBD::warning << _("PortAudioBackend: samples per period does not match.") << endmsg;
+ }
+#endif
+
+ if (_pcmio->sample_rate() != _samplerate) {
+ _samplerate = _pcmio->sample_rate();
+ engine.sample_rate_change (_samplerate);
+ PBD::warning << _("PortAudioBackend: sample rate does not match.") << endmsg;
+ }
+
+ _measure_latency = for_latency_measurement;
+
+ _run = true;
+ _port_change_flag = false;
+
+ // TODO MIDI
+
+ if (register_system_audio_ports()) {
+ PBD::error << _("PortAudioBackend: failed to register system ports.") << endmsg;
+ _run = false;
+ return -1;
+ }
+
+ engine.sample_rate_change (_samplerate);
+ engine.buffer_size_change (_samples_per_period);
+
+ if (engine.reestablish_ports ()) {
+ PBD::error << _("PortAudioBackend: Could not re-establish ports.") << endmsg;
+ _run = false;
+ return -1;
+ }
+
+ engine.reconnect_ports ();
+ _run = true;
+ _port_change_flag = false;
+
+ if (_realtime_pthread_create (SCHED_FIFO, -20, 100000,
+ &_main_thread, pthread_process, this))
+ {
+ if (pthread_create (&_main_thread, NULL, pthread_process, this))
+ {
+ PBD::error << _("PortAudioBackend: failed to create process thread.") << endmsg;
+ _run = false;
+ return -1;
+ } else {
+ PBD::warning << _("PortAudioBackend: cannot acquire realtime permissions.") << endmsg;
+ }
+ }
+
+ int timeout = 5000;
+ while (!_active && --timeout > 0) { Glib::usleep (1000); }
+
+ if (timeout == 0 || !_active) {
+ PBD::error << _("PortAudioBackend: failed to start.") << endmsg;
+ _pcmio->pcm_stop();
+ _run = false;
+ unregister_ports();
+ _active = false;
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+PortAudioBackend::stop ()
+{
+ void *status;
+ if (!_run) {
+ return 0;
+ }
+
+ _run = false;
+ if (pthread_join (_main_thread, &status)) {
+ PBD::error << _("PortAudioBackend: failed to terminate.") << endmsg;
+ return -1;
+ }
+
+
+ unregister_ports();
+
+ return (_active == false) ? 0 : -1;
+}
+
+int
+PortAudioBackend::freewheel (bool onoff)
+{
+ if (onoff == _freewheeling) {
+ return 0;
+ }
+ _freewheeling = onoff;
+ return 0;
+}
+
+float
+PortAudioBackend::dsp_load () const
+{
+ return 100.f * _dsp_load;
+}
+
+size_t
+PortAudioBackend::raw_buffer_size (DataType t)
+{
+ switch (t) {
+ case DataType::AUDIO:
+ return _samples_per_period * sizeof(Sample);
+ case DataType::MIDI:
+ return _max_buffer_size; // XXX not really limited
+ }
+ return 0;
+}
+
+/* Process time */
+framepos_t
+PortAudioBackend::sample_time ()
+{
+ return _processed_samples;
+}
+
+framepos_t
+PortAudioBackend::sample_time_at_cycle_start ()
+{
+ return _processed_samples;
+}
+
+pframes_t
+PortAudioBackend::samples_since_cycle_start ()
+{
+ if (!_active || !_run || _freewheeling || _freewheel) {
+ return 0;
+ }
+ if (_last_process_start == 0) {
+ return 0;
+ }
+
+ const int64_t elapsed_time_us = g_get_monotonic_time() - _last_process_start;
+ return std::max((pframes_t)0, (pframes_t)rint(1e-6 * elapsed_time_us * _samplerate));
+}
+
+int
+PortAudioBackend::name_to_id(std::string device_name) const {
+ uint32_t device_id = UINT32_MAX;
+ std::map<int, std::string> devices;
+ _pcmio->device_list(devices);
+
+ for (std::map<int, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
+ if (i->second == device_name) {
+ device_id = i->first;
+ break;
+ }
+ }
+ return device_id;
+}
+
+void *
+PortAudioBackend::portaudio_process_thread (void *arg)
+{
+ ThreadData* td = reinterpret_cast<ThreadData*> (arg);
+ boost::function<void ()> f = td->f;
+ delete td;
+ f ();
+ return 0;
+}
+
+int
+PortAudioBackend::create_process_thread (boost::function<void()> func)
+{
+ pthread_t thread_id;
+ pthread_attr_t attr;
+ size_t stacksize = 100000;
+
+ ThreadData* td = new ThreadData (this, func, stacksize);
+
+ if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
+ &thread_id, portaudio_process_thread, td)) {
+ pthread_attr_init (&attr);
+ pthread_attr_setstacksize (&attr, stacksize);
+ if (pthread_create (&thread_id, &attr, portaudio_process_thread, td)) {
+ PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
+ pthread_attr_destroy (&attr);
+ return -1;
+ }
+ pthread_attr_destroy (&attr);
+ }
+
+ _threads.push_back (thread_id);
+ return 0;
+}
+
+int
+PortAudioBackend::join_process_threads ()
+{
+ int rv = 0;
+
+ for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
+ {
+ void *status;
+ if (pthread_join (*i, &status)) {
+ PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
+ rv -= 1;
+ }
+ }
+ _threads.clear ();
+ return rv;
+}
+
+bool
+PortAudioBackend::in_process_thread ()
+{
+ if (pthread_equal (_main_thread, pthread_self()) != 0) {
+ return true;
+ }
+
+ for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
+ {
+ if (pthread_equal (*i, pthread_self ()) != 0) {
+ return true;
+ }
+ }
+ return false;
+}
+
+uint32_t
+PortAudioBackend::process_thread_count ()
+{
+ return _threads.size ();
+}
+
+void
+PortAudioBackend::update_latencies ()
+{
+ // trigger latency callback in RT thread (locked graph)
+ port_connect_add_remove_callback();
+}
+
+/* PORTENGINE API */
+
+void*
+PortAudioBackend::private_handle () const
+{
+ return NULL;
+}
+
+const std::string&
+PortAudioBackend::my_name () const
+{
+ return _instance_name;
+}
+
+bool
+PortAudioBackend::available () const
+{
+ return _run && _active;
+}
+
+uint32_t
+PortAudioBackend::port_name_size () const
+{
+ return 256;
+}
+
+int
+PortAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
+{
+ if (!valid_port (port)) {
+ PBD::error << _("PortAudioBackend::set_port_name: Invalid Port(s)") << endmsg;
+ return -1;
+ }
+ return static_cast<PamPort*>(port)->set_name (_instance_name + ":" + name);
+}
+
+std::string
+PortAudioBackend::get_port_name (PortEngine::PortHandle port) const
+{
+ if (!valid_port (port)) {
+ PBD::error << _("PortAudioBackend::get_port_name: Invalid Port(s)") << endmsg;
+ return std::string ();
+ }
+ return static_cast<PamPort*>(port)->name ();
+}
+
+PortEngine::PortHandle
+PortAudioBackend::get_port_by_name (const std::string& name) const
+{
+ PortHandle port = (PortHandle) find_port (name);
+ return port;
+}
+
+int
+PortAudioBackend::get_ports (
+ const std::string& port_name_pattern,
+ DataType type, PortFlags flags,
+ std::vector<std::string>& port_names) const
+{
+ int rv = 0;
+ regex_t port_regex;
+ bool use_regexp = false;
+ if (port_name_pattern.size () > 0) {
+ if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
+ use_regexp = true;
+ }
+ }
+ for (size_t i = 0; i < _ports.size (); ++i) {
+ PamPort* port = _ports[i];
+ if ((port->type () == type) && (port->flags () & flags)) {
+ if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
+ port_names.push_back (port->name ());
+ ++rv;
+ }
+ }
+ }
+ if (use_regexp) {
+ regfree (&port_regex);
+ }
+ return rv;
+}
+
+DataType
+PortAudioBackend::port_data_type (PortEngine::PortHandle port) const
+{
+ if (!valid_port (port)) {
+ return DataType::NIL;
+ }
+ return static_cast<PamPort*>(port)->type ();
+}
+
+PortEngine::PortHandle
+PortAudioBackend::register_port (
+ const std::string& name,
+ ARDOUR::DataType type,
+ ARDOUR::PortFlags flags)
+{
+ if (name.size () == 0) { return 0; }
+ if (flags & IsPhysical) { return 0; }
+ return add_port (_instance_name + ":" + name, type, flags);
+}
+
+PortEngine::PortHandle
+PortAudioBackend::add_port (
+ const std::string& name,
+ ARDOUR::DataType type,
+ ARDOUR::PortFlags flags)
+{
+ assert(name.size ());
+ if (find_port (name)) {
+ PBD::error << _("PortAudioBackend::register_port: Port already exists:")
+ << " (" << name << ")" << endmsg;
+ return 0;
+ }
+ PamPort* port = NULL;
+ switch (type) {
+ case DataType::AUDIO:
+ port = new PortAudioPort (*this, name, flags);
+ break;
+ case DataType::MIDI:
+ port = new PortMidiPort (*this, name, flags);
+ break;
+ default:
+ PBD::error << _("PortAudioBackend::register_port: Invalid Data Type.") << endmsg;
+ return 0;
+ }
+
+ _ports.push_back (port);
+
+ return port;
+}
+
+void
+PortAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
+{
+ if (!_run) {
+ return;
+ }
+ PamPort* port = static_cast<PamPort*>(port_handle);
+ std::vector<PamPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<PamPort*>(port_handle));
+ if (i == _ports.end ()) {
+ PBD::error << _("PortAudioBackend::unregister_port: Failed to find port") << endmsg;
+ return;
+ }
+ disconnect_all(port_handle);
+ _ports.erase (i);
+ delete port;
+}
+
+int
+PortAudioBackend::register_system_audio_ports()
+{
+ LatencyRange lr;
+
+ const uint32_t a_ins = _n_inputs;
+ const uint32_t a_out = _n_outputs;
+
+ // XXX PA reported stream latencies don't match measurements
+ const uint32_t portaudio_reported_input_latency = _samples_per_period ; // _pcmio->capture_latency();
+ const uint32_t portaudio_reported_output_latency = /* _samples_per_period + */ _pcmio->playback_latency();
+
+ /* audio ports */
+ lr.min = lr.max = portaudio_reported_input_latency + (_measure_latency ? 0 : _systemic_audio_input_latency);
+ for (uint32_t i = 0; i < a_ins; ++i) {
+ char tmp[64];
+ snprintf(tmp, sizeof(tmp), "system:capture_%d", i+1);
+ PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
+ if (!p) return -1;
+ set_latency_range (p, false, lr);
+ _system_inputs.push_back(static_cast<PortAudioPort*>(p));
+ }
+
+ lr.min = lr.max = portaudio_reported_output_latency + (_measure_latency ? 0 : _systemic_audio_output_latency);
+ for (uint32_t i = 0; i < a_out; ++i) {
+ char tmp[64];
+ snprintf(tmp, sizeof(tmp), "system:playback_%d", i+1);
+ PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
+ if (!p) return -1;
+ set_latency_range (p, true, lr);
+ _system_outputs.push_back(static_cast<PamPort*>(p));
+ }
+ return 0;
+}
+
+void
+PortAudioBackend::unregister_ports (bool system_only)
+{
+ size_t i = 0;
+ _system_inputs.clear();
+ _system_outputs.clear();
+ _system_midi_in.clear();
+ _system_midi_out.clear();
+ while (i < _ports.size ()) {
+ PamPort* port = _ports[i];
+ if (! system_only || (port->is_physical () && port->is_terminal ())) {
+ port->disconnect_all ();
+ delete port;
+ _ports.erase (_ports.begin() + i);
+ } else {
+ ++i;
+ }
+ }
+}
+
+int
+PortAudioBackend::connect (const std::string& src, const std::string& dst)
+{
+ PamPort* src_port = find_port (src);
+ PamPort* dst_port = find_port (dst);
+
+ if (!src_port) {
+ PBD::error << _("PortAudioBackend::connect: Invalid Source port:")
+ << " (" << src <<")" << endmsg;
+ return -1;
+ }
+ if (!dst_port) {
+ PBD::error << _("PortAudioBackend::connect: Invalid Destination port:")
+ << " (" << dst <<")" << endmsg;
+ return -1;
+ }
+ return src_port->connect (dst_port);
+}
+
+int
+PortAudioBackend::disconnect (const std::string& src, const std::string& dst)
+{
+ PamPort* src_port = find_port (src);
+ PamPort* dst_port = find_port (dst);
+
+ if (!src_port || !dst_port) {
+ PBD::error << _("PortAudioBackend::disconnect: Invalid Port(s)") << endmsg;
+ return -1;
+ }
+ return src_port->disconnect (dst_port);
+}
+
+int
+PortAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
+{
+ PamPort* dst_port = find_port (dst);
+ if (!valid_port (src)) {
+ PBD::error << _("PortAudioBackend::connect: Invalid Source Port Handle") << endmsg;
+ return -1;
+ }
+ if (!dst_port) {
+ PBD::error << _("PortAudioBackend::connect: Invalid Destination Port")
+ << " (" << dst << ")" << endmsg;
+ return -1;
+ }
+ return static_cast<PamPort*>(src)->connect (dst_port);
+}
+
+int
+PortAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
+{
+ PamPort* dst_port = find_port (dst);
+ if (!valid_port (src) || !dst_port) {
+ PBD::error << _("PortAudioBackend::disconnect: Invalid Port(s)") << endmsg;
+ return -1;
+ }
+ return static_cast<PamPort*>(src)->disconnect (dst_port);
+}
+
+int
+PortAudioBackend::disconnect_all (PortEngine::PortHandle port)
+{
+ if (!valid_port (port)) {
+ PBD::error << _("PortAudioBackend::disconnect_all: Invalid Port") << endmsg;
+ return -1;
+ }
+ static_cast<PamPort*>(port)->disconnect_all ();
+ return 0;
+}
+
+bool
+PortAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
+{
+ if (!valid_port (port)) {
+ PBD::error << _("PortAudioBackend::disconnect_all: Invalid Port") << endmsg;
+ return false;
+ }
+ return static_cast<PamPort*>(port)->is_connected ();
+}
+
+bool
+PortAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
+{
+ PamPort* dst_port = find_port (dst);
+ if (!valid_port (src) || !dst_port) {
+ PBD::error << _("PortAudioBackend::connected_to: Invalid Port") << endmsg;
+ return false;
+ }
+ return static_cast<PamPort*>(src)->is_connected (dst_port);
+}
+
+bool
+PortAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
+{
+ if (!valid_port (port)) {
+ PBD::error << _("PortAudioBackend::physically_connected: Invalid Port") << endmsg;
+ return false;
+ }
+ return static_cast<PamPort*>(port)->is_physically_connected ();
+}
+
+int
+PortAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
+{
+ if (!valid_port (port)) {
+ PBD::error << _("PortAudioBackend::get_connections: Invalid Port") << endmsg;
+ return -1;
+ }
+
+ assert (0 == names.size ());
+
+ const std::vector<PamPort*>& connected_ports = static_cast<PamPort*>(port)->get_connections ();
+
+ for (std::vector<PamPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
+ names.push_back ((*i)->name ());
+ }
+
+ return (int)names.size ();
+}
+
+/* MIDI */
+int
+PortAudioBackend::midi_event_get (
+ pframes_t& timestamp,
+ size_t& size, uint8_t** buf, void* port_buffer,
+ uint32_t event_index)
+{
+ if (!buf || !port_buffer) return -1;
+ PortMidiBuffer& source = * static_cast<PortMidiBuffer*>(port_buffer);
+ if (event_index >= source.size ()) {
+ return -1;
+ }
+ PortMidiEvent * const event = source[event_index].get ();
+
+ timestamp = event->timestamp ();
+ size = event->size ();
+ *buf = event->data ();
+ return 0;
+}
+
+int
+PortAudioBackend::midi_event_put (
+ void* port_buffer,
+ pframes_t timestamp,
+ const uint8_t* buffer, size_t size)
+{
+ if (!buffer || !port_buffer) return -1;
+ PortMidiBuffer& dst = * static_cast<PortMidiBuffer*>(port_buffer);
+ if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
+#ifndef NDEBUG
+ // nevermind, ::get_buffer() sorts events
+ fprintf (stderr, "PortMidiBuffer: unordered event: %d > %d\n",
+ (pframes_t)dst.back ()->timestamp (), timestamp);
+#endif
+ }
+ dst.push_back (boost::shared_ptr<PortMidiEvent>(new PortMidiEvent (timestamp, buffer, size)));
+ return 0;
+}
+
+uint32_t
+PortAudioBackend::get_midi_event_count (void* port_buffer)
+{
+ if (!port_buffer) return 0;
+ return static_cast<PortMidiBuffer*>(port_buffer)->size ();
+}
+
+void
+PortAudioBackend::midi_clear (void* port_buffer)
+{
+ if (!port_buffer) return;
+ PortMidiBuffer * buf = static_cast<PortMidiBuffer*>(port_buffer);
+ assert (buf);
+ buf->clear ();
+}
+
+/* Monitoring */
+
+bool
+PortAudioBackend::can_monitor_input () const
+{
+ return false;
+}
+
+int
+PortAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
+{
+ return -1;
+}
+
+int
+PortAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
+{
+ return -1;
+}
+
+bool
+PortAudioBackend::monitoring_input (PortEngine::PortHandle)
+{
+ return false;
+}
+
+/* Latency management */
+
+void
+PortAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
+{
+ if (!valid_port (port)) {
+ PBD::error << _("PamPort::set_latency_range (): invalid port.") << endmsg;
+ }
+ static_cast<PamPort*>(port)->set_latency_range (latency_range, for_playback);
+}
+
+LatencyRange
+PortAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
+{
+ LatencyRange r;
+ if (!valid_port (port)) {
+ PBD::error << _("PamPort::get_latency_range (): invalid port.") << endmsg;
+ r.min = 0;
+ r.max = 0;
+ return r;
+ }
+ PamPort* p = static_cast<PamPort*>(port);
+ assert(p);
+
+ r = p->latency_range (for_playback);
+ // TODO MIDI
+ if (p->is_physical() && p->is_terminal() && p->type() == DataType::AUDIO) {
+ if (p->is_input() && for_playback) {
+ r.min += _samples_per_period;
+ r.max += _samples_per_period;
+ }
+ if (p->is_output() && !for_playback) {
+ r.min += _samples_per_period;
+ r.max += _samples_per_period;
+ }
+ }
+ return r;
+}
+
+/* Discovering physical ports */
+
+bool
+PortAudioBackend::port_is_physical (PortEngine::PortHandle port) const
+{
+ if (!valid_port (port)) {
+ PBD::error << _("PamPort::port_is_physical (): invalid port.") << endmsg;
+ return false;
+ }
+ return static_cast<PamPort*>(port)->is_physical ();
+}
+
+void
+PortAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
+{
+ for (size_t i = 0; i < _ports.size (); ++i) {
+ PamPort* port = _ports[i];
+ if ((port->type () == type) && port->is_input () && port->is_physical ()) {
+ port_names.push_back (port->name ());
+ }
+ }
+}
+
+void
+PortAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
+{
+ for (size_t i = 0; i < _ports.size (); ++i) {
+ PamPort* port = _ports[i];
+ if ((port->type () == type) && port->is_output () && port->is_physical ()) {
+ port_names.push_back (port->name ());
+ }
+ }
+}
+
+ChanCount
+PortAudioBackend::n_physical_outputs () const
+{
+ int n_midi = 0;
+ int n_audio = 0;
+ for (size_t i = 0; i < _ports.size (); ++i) {
+ PamPort* port = _ports[i];
+ if (port->is_output () && port->is_physical ()) {
+ switch (port->type ()) {
+ case DataType::AUDIO: ++n_audio; break;
+ case DataType::MIDI: ++n_midi; break;
+ default: break;
+ }
+ }
+ }
+ ChanCount cc;
+ cc.set (DataType::AUDIO, n_audio);
+ cc.set (DataType::MIDI, n_midi);
+ return cc;
+}
+
+ChanCount
+PortAudioBackend::n_physical_inputs () const
+{
+ int n_midi = 0;
+ int n_audio = 0;
+ for (size_t i = 0; i < _ports.size (); ++i) {
+ PamPort* port = _ports[i];
+ if (port->is_input () && port->is_physical ()) {
+ switch (port->type ()) {
+ case DataType::AUDIO: ++n_audio; break;
+ case DataType::MIDI: ++n_midi; break;
+ default: break;
+ }
+ }
+ }
+ ChanCount cc;
+ cc.set (DataType::AUDIO, n_audio);
+ cc.set (DataType::MIDI, n_midi);
+ return cc;
+}
+
+/* Getting access to the data buffer for a port */
+
+void*
+PortAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
+{
+ if (!port || !valid_port (port)) return NULL;
+ return static_cast<PamPort*>(port)->get_buffer (nframes);
+}
+
+
+void *
+PortAudioBackend::main_process_thread ()
+{
+ AudioEngine::thread_init_callback (this);
+ _active = true;
+ _processed_samples = 0;
+
+ uint64_t clock1, clock2;
+ const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
+
+ manager.registration_callback();
+ manager.graph_order_callback();
+
+ if (_pcmio->pcm_start()) {
+ _pcmio->pcm_stop ();
+ _active = false;
+ engine.halted_callback("PortAudio I/O error.");
+ }
+
+ while (_run) {
+
+ if (_freewheeling != _freewheel) {
+ _freewheel = _freewheeling;
+ engine.freewheel_callback (_freewheel);
+ }
+
+ if (!_freewheel) {
+
+ switch (_pcmio->next_cycle (_samples_per_period)) {
+ case 0: // OK
+ break;
+ case 1:
+#ifndef NDEBUG
+ printf("PortAudio: Xrun\n");
+#endif
+ engine.Xrun ();
+ break;
+ default:
+ PBD::error << _("PortAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
+ break;
+ }
+
+ uint32_t i = 0;
+ clock1 = g_get_monotonic_time();
+
+ /* get audio */
+ i = 0;
+ for (std::vector<PamPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
+ _pcmio->get_capture_channel (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
+ }
+
+ /* de-queue incoming midi*/
+ i=0;
+ for (std::vector<PamPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
+ PortMidiBuffer* mbuf = static_cast<PortMidiBuffer*>((*it)->get_buffer(0));
+ mbuf->clear();
+ }
+
+ /* clear output buffers */
+ for (std::vector<PamPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
+ memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
+ }
+
+ /* call engine process callback */
+ _last_process_start = g_get_monotonic_time();
+ if (engine.process_callback (_samples_per_period)) {
+ _pcmio->pcm_stop ();
+ _active = false;
+ return 0;
+ }
+#if 0
+ /* mixdown midi */
+ for (std::vector<PamPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
+ static_cast<PortBackendMidiPort*>(*it)->next_period();
+ }
+
+ /* queue outgoing midi */
+ i = 0;
+ for (std::vector<PamPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
+ // TODO
+ }
+#endif
+
+ /* write back audio */
+ i = 0;
+ for (std::vector<PamPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
+ _pcmio->set_playback_channel (i, (float const*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
+ }
+
+ _processed_samples += _samples_per_period;
+
+ /* calculate DSP load */
+ clock2 = g_get_monotonic_time();
+ const int64_t elapsed_time = clock2 - clock1;
+ _dsp_load = elapsed_time / (float) nomial_time;
+
+ } else {
+ // Freewheelin'
+
+ // zero audio input buffers
+ for (std::vector<PamPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
+ memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
+ }
+
+ clock1 = g_get_monotonic_time();
+
+ // TODO clear midi or stop midi recv when entering fwheelin'
+
+ _last_process_start = 0;
+ if (engine.process_callback (_samples_per_period)) {
+ _pcmio->pcm_stop ();
+ _active = false;
+ return 0;
+ }
+
+ // drop all outgoing MIDI messages
+ for (std::vector<PamPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
+ void *bptr = (*it)->get_buffer(0);
+ midi_clear(bptr);
+ }
+
+ _dsp_load = 1.0;
+ Glib::usleep (100); // don't hog cpu
+ }
+
+ bool connections_changed = false;
+ bool ports_changed = false;
+ if (!pthread_mutex_trylock (&_port_callback_mutex)) {
+ if (_port_change_flag) {
+ ports_changed = true;
+ _port_change_flag = false;
+ }
+ if (!_port_connection_queue.empty ()) {
+ connections_changed = true;
+ }
+ while (!_port_connection_queue.empty ()) {
+ PortConnectData *c = _port_connection_queue.back ();
+ manager.connect_callback (c->a, c->b, c->c);
+ _port_connection_queue.pop_back ();
+ delete c;
+ }
+ pthread_mutex_unlock (&_port_callback_mutex);
+ }
+ if (ports_changed) {
+ manager.registration_callback();
+ }
+ if (connections_changed) {
+ manager.graph_order_callback();
+ }
+ if (connections_changed || ports_changed) {
+ engine.latency_callback(false);
+ engine.latency_callback(true);
+ }
+
+ }
+ _pcmio->pcm_stop ();
+ _active = false;
+ if (_run) {
+ engine.halted_callback("PortAudio I/O error.");
+ }
+ return 0;
+}
+
+
+/******************************************************************************/
+
+static boost::shared_ptr<PortAudioBackend> _instance;
+
+static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
+static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
+static int deinstantiate ();
+static bool already_configured ();
+static bool available ();
+
+static ARDOUR::AudioBackendInfo _descriptor = {
+ "PortAudio",
+ instantiate,
+ deinstantiate,
+ backend_factory,
+ already_configured,
+ available
+};
+
+static boost::shared_ptr<AudioBackend>
+backend_factory (AudioEngine& e)
+{
+ if (!_instance) {
+ _instance.reset (new PortAudioBackend (e, _descriptor));
+ }
+ return _instance;
+}
+
+static int
+instantiate (const std::string& arg1, const std::string& /* arg2 */)
+{
+ s_instance_name = arg1;
+ return 0;
+}
+
+static int
+deinstantiate ()
+{
+ _instance.reset ();
+ return 0;
+}
+
+static bool
+already_configured ()
+{
+ return false;
+}
+
+static bool
+available ()
+{
+ return true;
+}
+
+extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
+{
+ return &_descriptor;
+}
+
+
+/******************************************************************************/
+PamPort::PamPort (PortAudioBackend &b, const std::string& name, PortFlags flags)
+ : _osx_backend (b)
+ , _name (name)
+ , _flags (flags)
+{
+ _capture_latency_range.min = 0;
+ _capture_latency_range.max = 0;
+ _playback_latency_range.min = 0;
+ _playback_latency_range.max = 0;
+}
+
+PamPort::~PamPort () {
+ disconnect_all ();
+}
+
+
+int PamPort::connect (PamPort *port)
+{
+ if (!port) {
+ PBD::error << _("PamPort::connect (): invalid (null) port") << endmsg;
+ return -1;
+ }
+
+ if (type () != port->type ()) {
+ PBD::error << _("PamPort::connect (): wrong port-type") << endmsg;
+ return -1;
+ }
+
+ if (is_output () && port->is_output ()) {
+ PBD::error << _("PamPort::connect (): cannot inter-connect output ports.") << endmsg;
+ return -1;
+ }
+
+ if (is_input () && port->is_input ()) {
+ PBD::error << _("PamPort::connect (): cannot inter-connect input ports.") << endmsg;
+ return -1;
+ }
+
+ if (this == port) {
+ PBD::error << _("PamPort::connect (): cannot self-connect ports.") << endmsg;
+ return -1;
+ }
+
+ if (is_connected (port)) {
+#if 0 // don't bother to warn about this for now. just ignore it
+ PBD::error << _("PamPort::connect (): ports are already connected:")
+ << " (" << name () << ") -> (" << port->name () << ")"
+ << endmsg;
+#endif
+ return -1;
+ }
+
+ _connect (port, true);
+ return 0;
+}
+
+
+void PamPort::_connect (PamPort *port, bool callback)
+{
+ _connections.push_back (port);
+ if (callback) {
+ port->_connect (this, false);
+ _osx_backend.port_connect_callback (name(), port->name(), true);
+ }
+}
+
+int PamPort::disconnect (PamPort *port)
+{
+ if (!port) {
+ PBD::error << _("PamPort::disconnect (): invalid (null) port") << endmsg;
+ return -1;
+ }
+
+ if (!is_connected (port)) {
+ PBD::error << _("PamPort::disconnect (): ports are not connected:")
+ << " (" << name () << ") -> (" << port->name () << ")"
+ << endmsg;
+ return -1;
+ }
+ _disconnect (port, true);
+ return 0;
+}
+
+void PamPort::_disconnect (PamPort *port, bool callback)
+{
+ std::vector<PamPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
+
+ assert (it != _connections.end ());
+
+ _connections.erase (it);
+
+ if (callback) {
+ port->_disconnect (this, false);
+ _osx_backend.port_connect_callback (name(), port->name(), false);
+ }
+}
+
+
+void PamPort::disconnect_all ()
+{
+ while (!_connections.empty ()) {
+ _connections.back ()->_disconnect (this, false);
+ _osx_backend.port_connect_callback (name(), _connections.back ()->name(), false);
+ _connections.pop_back ();
+ }
+}
+
+bool
+PamPort::is_connected (const PamPort *port) const
+{
+ return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
+}
+
+bool PamPort::is_physically_connected () const
+{
+ for (std::vector<PamPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
+ if ((*it)->is_physical ()) {
+ return true;
+ }
+ }
+ return false;
+}
+
+/******************************************************************************/
+
+PortAudioPort::PortAudioPort (PortAudioBackend &b, const std::string& name, PortFlags flags)
+ : PamPort (b, name, flags)
+{
+ memset (_buffer, 0, sizeof (_buffer));
+#ifndef PLATFORM_WINDOWS
+ mlock(_buffer, sizeof (_buffer));
+#endif
+}
+
+PortAudioPort::~PortAudioPort () { }
+
+void* PortAudioPort::get_buffer (pframes_t n_samples)
+{
+ if (is_input ()) {
+ std::vector<PamPort*>::const_iterator it = get_connections ().begin ();
+ if (it == get_connections ().end ()) {
+ memset (_buffer, 0, n_samples * sizeof (Sample));
+ } else {
+ PortAudioPort const * source = static_cast<const PortAudioPort*>(*it);
+ assert (source && source->is_output ());
+ memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
+ while (++it != get_connections ().end ()) {
+ source = static_cast<const PortAudioPort*>(*it);
+ assert (source && source->is_output ());
+ Sample* dst = buffer ();
+ const Sample* src = source->const_buffer ();
+ for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
+ *dst += *src;
+ }
+ }
+ }
+ }
+ return _buffer;
+}
+
+
+PortMidiPort::PortMidiPort (PortAudioBackend &b, const std::string& name, PortFlags flags)
+ : PamPort (b, name, flags)
+ , _n_periods (1)
+ , _bufperiod (0)
+{
+ _buffer[0].clear ();
+ _buffer[1].clear ();
+}
+
+PortMidiPort::~PortMidiPort () { }
+
+struct MidiEventSorter {
+ bool operator() (const boost::shared_ptr<PortMidiEvent>& a, const boost::shared_ptr<PortMidiEvent>& b) {
+ return *a < *b;
+ }
+};
+
+void* PortMidiPort::get_buffer (pframes_t /* nframes */)
+{
+ if (is_input ()) {
+ (_buffer[_bufperiod]).clear ();
+ for (std::vector<PamPort*>::const_iterator i = get_connections ().begin ();
+ i != get_connections ().end ();
+ ++i) {
+ const PortMidiBuffer * src = static_cast<const PortMidiPort*>(*i)->const_buffer ();
+ for (PortMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
+ (_buffer[_bufperiod]).push_back (boost::shared_ptr<PortMidiEvent>(new PortMidiEvent (**it)));
+ }
+ }
+ std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
+ }
+ return &(_buffer[_bufperiod]);
+}
+
+PortMidiEvent::PortMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
+ : _size (size)
+ , _timestamp (timestamp)
+ , _data (0)
+{
+ if (size > 0) {
+ _data = (uint8_t*) malloc (size);
+ memcpy (_data, data, size);
+ }
+}
+
+PortMidiEvent::PortMidiEvent (const PortMidiEvent& other)
+ : _size (other.size ())
+ , _timestamp (other.timestamp ())
+ , _data (0)
+{
+ if (other.size () && other.const_data ()) {
+ _data = (uint8_t*) malloc (other.size ());
+ memcpy (_data, other.const_data (), other.size ());
+ }
+};
+
+PortMidiEvent::~PortMidiEvent () {
+ free (_data);
+};
--- /dev/null
+/*
+ * Copyright (C) 2014-2015 Robin Gareus <robin@gareus.org>
+ * Copyright (C) 2013 Paul Davis
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __libbackend_portaudio_backend_h__
+#define __libbackend_portaudio_backend_h__
+
+#include <string>
+#include <vector>
+#include <set>
+
+#include <stdint.h>
+#include <pthread.h>
+
+#include <boost/shared_ptr.hpp>
+
+#include "ardour/audio_backend.h"
+#include "ardour/types.h"
+
+#include "portaudio_io.h"
+
+namespace ARDOUR {
+
+class PortAudioBackend;
+
+class PortMidiEvent {
+ public:
+ PortMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size);
+ PortMidiEvent (const PortMidiEvent& other);
+ ~PortMidiEvent ();
+ size_t size () const { return _size; };
+ pframes_t timestamp () const { return _timestamp; };
+ const unsigned char* const_data () const { return _data; };
+ unsigned char* data () { return _data; };
+ bool operator< (const PortMidiEvent &other) const { return timestamp () < other.timestamp (); };
+ private:
+ size_t _size;
+ pframes_t _timestamp;
+ uint8_t *_data;
+};
+
+typedef std::vector<boost::shared_ptr<PortMidiEvent> > PortMidiBuffer;
+
+class PamPort { // PortAudio / PortMidi Backend Port
+ protected:
+ PamPort (PortAudioBackend &b, const std::string&, PortFlags);
+ public:
+ virtual ~PamPort ();
+
+ const std::string& name () const { return _name; }
+ PortFlags flags () const { return _flags; }
+
+ int set_name (const std::string &name) { _name = name; return 0; }
+
+ virtual DataType type () const = 0;
+
+ bool is_input () const { return flags () & IsInput; }
+ bool is_output () const { return flags () & IsOutput; }
+ bool is_physical () const { return flags () & IsPhysical; }
+ bool is_terminal () const { return flags () & IsTerminal; }
+ bool is_connected () const { return _connections.size () != 0; }
+ bool is_connected (const PamPort *port) const;
+ bool is_physically_connected () const;
+
+ const std::vector<PamPort *>& get_connections () const { return _connections; }
+
+ int connect (PamPort *port);
+ int disconnect (PamPort *port);
+ void disconnect_all ();
+
+ virtual void* get_buffer (pframes_t nframes) = 0;
+
+ const LatencyRange latency_range (bool for_playback) const
+ {
+ return for_playback ? _playback_latency_range : _capture_latency_range;
+ }
+
+ void set_latency_range (const LatencyRange &latency_range, bool for_playback)
+ {
+ if (for_playback)
+ {
+ _playback_latency_range = latency_range;
+ }
+ else
+ {
+ _capture_latency_range = latency_range;
+ }
+ }
+
+ private:
+ PortAudioBackend &_osx_backend;
+ std::string _name;
+ const PortFlags _flags;
+ LatencyRange _capture_latency_range;
+ LatencyRange _playback_latency_range;
+ std::vector<PamPort*> _connections;
+
+ void _connect (PamPort* , bool);
+ void _disconnect (PamPort* , bool);
+
+}; // class PamPort
+
+class PortAudioPort : public PamPort {
+ public:
+ PortAudioPort (PortAudioBackend &b, const std::string&, PortFlags);
+ ~PortAudioPort ();
+
+ DataType type () const { return DataType::AUDIO; };
+
+ Sample* buffer () { return _buffer; }
+ const Sample* const_buffer () const { return _buffer; }
+ void* get_buffer (pframes_t nframes);
+
+ private:
+ Sample _buffer[8192];
+}; // class PortAudioPort
+
+class PortMidiPort : public PamPort {
+ public:
+ PortMidiPort (PortAudioBackend &b, const std::string&, PortFlags);
+ ~PortMidiPort ();
+
+ DataType type () const { return DataType::MIDI; };
+
+ void* get_buffer (pframes_t nframes);
+ const PortMidiBuffer * const_buffer () const { return & _buffer[_bufperiod]; }
+
+ void next_period() { if (_n_periods > 1) { get_buffer(0); _bufperiod = (_bufperiod + 1) % _n_periods; } }
+ void set_n_periods(int n) { if (n > 0 && n < 3) { _n_periods = n; } }
+
+ private:
+ PortMidiBuffer _buffer[2];
+ int _n_periods;
+ int _bufperiod;
+}; // class PortMidiPort
+
+class PortAudioBackend : public AudioBackend {
+ friend class PamPort;
+ public:
+ PortAudioBackend (AudioEngine& e, AudioBackendInfo& info);
+ ~PortAudioBackend ();
+
+ /* AUDIOBACKEND API */
+
+ std::string name () const;
+ bool is_realtime () const;
+
+ std::vector<DeviceStatus> enumerate_devices () const;
+ std::vector<float> available_sample_rates (const std::string& device) const;
+ std::vector<uint32_t> available_buffer_sizes (const std::string& device) const;
+ uint32_t available_input_channel_count (const std::string& device) const;
+ uint32_t available_output_channel_count (const std::string& device) const;
+
+ bool can_change_sample_rate_when_running () const;
+ bool can_change_buffer_size_when_running () const;
+
+ int set_device_name (const std::string&);
+ int set_sample_rate (float);
+ int set_buffer_size (uint32_t);
+ int set_interleaved (bool yn);
+ int set_input_channels (uint32_t);
+ int set_output_channels (uint32_t);
+ int set_systemic_input_latency (uint32_t);
+ int set_systemic_output_latency (uint32_t);
+ int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
+ int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
+
+ int reset_device () { return 0; };
+
+ /* Retrieving parameters */
+ std::string device_name () const;
+ float sample_rate () const;
+ uint32_t buffer_size () const;
+ bool interleaved () const;
+ uint32_t input_channels () const;
+ uint32_t output_channels () const;
+ uint32_t systemic_input_latency () const;
+ uint32_t systemic_output_latency () const;
+ uint32_t systemic_midi_input_latency (std::string const) const { return 0; }
+ uint32_t systemic_midi_output_latency (std::string const) const { return 0; }
+
+ bool can_set_systemic_midi_latencies () const { return false; }
+
+ /* External control app */
+ std::string control_app_name () const { return std::string (); }
+ void launch_control_app () {}
+
+ /* MIDI */
+ std::vector<std::string> enumerate_midi_options () const;
+ int set_midi_option (const std::string&);
+ std::string midi_option () const;
+
+ std::vector<DeviceStatus> enumerate_midi_devices () const {
+ return std::vector<AudioBackend::DeviceStatus> ();
+ }
+ int set_midi_device_enabled (std::string const, bool) {
+ return 0;
+ }
+ bool midi_device_enabled (std::string const) const {
+ return true;
+ }
+
+ protected:
+ /* State Control */
+ int _start (bool for_latency_measurement);
+ public:
+ int stop ();
+ int freewheel (bool);
+ float dsp_load () const;
+ size_t raw_buffer_size (DataType t);
+
+ /* Process time */
+ framepos_t sample_time ();
+ framepos_t sample_time_at_cycle_start ();
+ pframes_t samples_since_cycle_start ();
+
+ int create_process_thread (boost::function<void()> func);
+ int join_process_threads ();
+ bool in_process_thread ();
+ uint32_t process_thread_count ();
+
+ void update_latencies ();
+
+ /* PORTENGINE API */
+
+ void* private_handle () const;
+ const std::string& my_name () const;
+ bool available () const;
+ uint32_t port_name_size () const;
+
+ int set_port_name (PortHandle, const std::string&);
+ std::string get_port_name (PortHandle) const;
+ PortHandle get_port_by_name (const std::string&) const;
+
+ int get_ports (const std::string& port_name_pattern, DataType type, PortFlags flags, std::vector<std::string>&) const;
+
+ DataType port_data_type (PortHandle) const;
+
+ PortHandle register_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
+ void unregister_port (PortHandle);
+
+ int connect (const std::string& src, const std::string& dst);
+ int disconnect (const std::string& src, const std::string& dst);
+ int connect (PortHandle, const std::string&);
+ int disconnect (PortHandle, const std::string&);
+ int disconnect_all (PortHandle);
+
+ bool connected (PortHandle, bool process_callback_safe);
+ bool connected_to (PortHandle, const std::string&, bool process_callback_safe);
+ bool physically_connected (PortHandle, bool process_callback_safe);
+ int get_connections (PortHandle, std::vector<std::string>&, bool process_callback_safe);
+
+ /* MIDI */
+ int midi_event_get (pframes_t& timestamp, size_t& size, uint8_t** buf, void* port_buffer, uint32_t event_index);
+ int midi_event_put (void* port_buffer, pframes_t timestamp, const uint8_t* buffer, size_t size);
+ uint32_t get_midi_event_count (void* port_buffer);
+ void midi_clear (void* port_buffer);
+
+ /* Monitoring */
+
+ bool can_monitor_input () const;
+ int request_input_monitoring (PortHandle, bool);
+ int ensure_input_monitoring (PortHandle, bool);
+ bool monitoring_input (PortHandle);
+
+ /* Latency management */
+
+ void set_latency_range (PortHandle, bool for_playback, LatencyRange);
+ LatencyRange get_latency_range (PortHandle, bool for_playback);
+
+ /* Discovering physical ports */
+
+ bool port_is_physical (PortHandle) const;
+ void get_physical_outputs (DataType type, std::vector<std::string>&);
+ void get_physical_inputs (DataType type, std::vector<std::string>&);
+ ChanCount n_physical_outputs () const;
+ ChanCount n_physical_inputs () const;
+
+ /* Getting access to the data buffer for a port */
+
+ void* get_buffer (PortHandle, pframes_t);
+
+ void* main_process_thread ();
+
+ private:
+ std::string _instance_name;
+ PortAudioIO *_pcmio;
+
+ bool _run; /* keep going or stop, ardour thread */
+ bool _active; /* is running, process thread */
+ bool _freewheel;
+ bool _freewheeling;
+ bool _measure_latency;
+
+ uint64_t _last_process_start;
+
+ static std::vector<std::string> _midi_options;
+ static std::vector<AudioBackend::DeviceStatus> _audio_device_status;
+ static std::vector<AudioBackend::DeviceStatus> _midi_device_status;
+
+ mutable std::string _audio_device;
+ std::string _midi_driver_option;
+
+ /* audio settings */
+ float _samplerate;
+ size_t _samples_per_period;
+ static size_t _max_buffer_size;
+
+ uint32_t _n_inputs;
+ uint32_t _n_outputs;
+
+ uint32_t _systemic_audio_input_latency;
+ uint32_t _systemic_audio_output_latency;
+
+ /* portaudio specific */
+ int name_to_id(std::string) const;
+
+ /* processing */
+ float _dsp_load;
+ framecnt_t _processed_samples;
+ pthread_t _main_thread;
+
+ /* process threads */
+ static void* portaudio_process_thread (void *);
+ std::vector<pthread_t> _threads;
+
+ struct ThreadData {
+ PortAudioBackend* engine;
+ boost::function<void ()> f;
+ size_t stacksize;
+
+ ThreadData (PortAudioBackend* e, boost::function<void ()> fp, size_t stacksz)
+ : engine (e) , f (fp) , stacksize (stacksz) {}
+ };
+
+ /* port engine */
+ PortHandle add_port (const std::string& shortname, ARDOUR::DataType, ARDOUR::PortFlags);
+ int register_system_audio_ports ();
+ void unregister_ports (bool system_only = false);
+
+ std::vector<PamPort *> _ports;
+ std::vector<PamPort *> _system_inputs;
+ std::vector<PamPort *> _system_outputs;
+ std::vector<PamPort *> _system_midi_in;
+ std::vector<PamPort *> _system_midi_out;
+
+ struct PortConnectData {
+ std::string a;
+ std::string b;
+ bool c;
+
+ PortConnectData (const std::string& a, const std::string& b, bool c)
+ : a (a) , b (b) , c (c) {}
+ };
+
+ std::vector<PortConnectData *> _port_connection_queue;
+ pthread_mutex_t _port_callback_mutex;
+ bool _port_change_flag;
+
+ void port_connect_callback (const std::string& a, const std::string& b, bool conn) {
+ pthread_mutex_lock (&_port_callback_mutex);
+ _port_connection_queue.push_back(new PortConnectData(a, b, conn));
+ pthread_mutex_unlock (&_port_callback_mutex);
+ }
+
+ void port_connect_add_remove_callback () {
+ pthread_mutex_lock (&_port_callback_mutex);
+ _port_change_flag = true;
+ pthread_mutex_unlock (&_port_callback_mutex);
+ }
+
+ bool valid_port (PortHandle port) const {
+ return std::find (_ports.begin (), _ports.end (), (PamPort*)port) != _ports.end ();
+ }
+
+ PamPort * find_port (const std::string& port_name) const {
+ for (std::vector<PamPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
+ if ((*it)->name () == port_name) {
+ return *it;
+ }
+ }
+ return NULL;
+ }
+
+ PamPort * find_port_in (std::vector<PamPort *> plist, const std::string& port_name) const {
+ for (std::vector<PamPort*>::const_iterator it = plist.begin (); it != plist.end (); ++it) {
+ if ((*it)->name () == port_name) {
+ return *it;
+ }
+ }
+ return NULL;
+ }
+
+}; // class PortAudioBackend
+
+} // namespace
+
+#endif /* __libbackend_portaudio_backend_h__ */
--- /dev/null
+/*
+ * Copyright (C) 2015 Robin Gareus <robin@gareus.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include "portaudio_io.h"
+
+using namespace ARDOUR;
+
+PortAudioIO::PortAudioIO ()
+ : _state (-1)
+ , _initialized (false)
+ , _capture_channels (0)
+ , _playback_channels (0)
+ , _stream (0)
+ , _input_buffer (0)
+ , _output_buffer (0)
+ , _cur_sample_rate (0)
+ , _cur_input_latency (0)
+ , _cur_output_latency (0)
+{
+}
+
+PortAudioIO::~PortAudioIO ()
+{
+ if (_state == 0) {
+ pcm_stop();
+ }
+ if (_initialized) {
+ Pa_Terminate();
+ }
+
+ for (std::map<int, paDevice*>::const_iterator i = _devices.begin (); i != _devices.end(); ++i) {
+ delete i->second;
+ }
+ _devices.clear();
+
+ free (_input_buffer); _input_buffer = NULL;
+ free (_output_buffer); _output_buffer = NULL;
+}
+
+
+int
+PortAudioIO::available_sample_rates(int device_id, std::vector<float>& sampleRates)
+{
+ static const float ardourRates[] = { 8000.0, 22050.0, 24000.0, 44100.0, 48000.0, 88200.0, 96000.0, 176400.0, 192000.0};
+
+ assert(_initialized);
+
+ // TODO use separate int device_input, int device_output ?!
+ if (device_id == -1) {
+ device_id = Pa_GetDefaultInputDevice();
+ }
+#ifndef NDEBUG
+ printf("PortAudio: Querying Samplerates for device %d\n", device_id);
+#endif
+
+ sampleRates.clear();
+ const PaDeviceInfo* nfo = Pa_GetDeviceInfo(device_id);
+
+ PaStreamParameters inputParam;
+ PaStreamParameters outputParam;
+
+ inputParam.device = device_id;
+ inputParam.channelCount = nfo->maxInputChannels;
+ inputParam.sampleFormat = paFloat32;
+ inputParam.suggestedLatency = 0;
+ inputParam.hostApiSpecificStreamInfo = 0;
+
+ outputParam.device = device_id;
+ outputParam.channelCount = nfo->maxOutputChannels;
+ outputParam.sampleFormat = paFloat32;
+ outputParam.suggestedLatency = 0;
+ outputParam.hostApiSpecificStreamInfo = 0;
+
+ for (uint32_t i = 0; i < sizeof(ardourRates)/sizeof(float); ++i) {
+ if (paFormatIsSupported == Pa_IsFormatSupported(
+ nfo->maxInputChannels > 0 ? &inputParam : NULL,
+ nfo->maxOutputChannels > 0 ? &outputParam : NULL,
+ ardourRates[i])) {
+ sampleRates.push_back (ardourRates[i]);
+ }
+ }
+
+ if (sampleRates.empty()) {
+ sampleRates.push_back (48000.0);
+ }
+
+ return 0;
+}
+
+int
+PortAudioIO::available_buffer_sizes(int device_id, std::vector<uint32_t>& bufferSizes)
+{
+ // TODO
+ static const uint32_t ardourSizes[] = { 64, 128, 256, 512, 1024, 2048, 4096 };
+ for(uint32_t i = 0; i < sizeof(ardourSizes)/sizeof(uint32_t); ++i) {
+ bufferSizes.push_back (ardourSizes[i]);
+ }
+ return 0;
+}
+
+void
+PortAudioIO::device_list (std::map<int, std::string> &devices) const {
+ devices.clear();
+ for (std::map<int, paDevice*>::const_iterator i = _devices.begin (); i != _devices.end(); ++i) {
+ devices.insert (std::pair<int, std::string> (i->first, i->second->name));
+ }
+}
+
+void
+PortAudioIO::discover()
+{
+ for (std::map<int, paDevice*>::const_iterator i = _devices.begin (); i != _devices.end(); ++i) {
+ delete i->second;
+ }
+ _devices.clear();
+
+ PaError err = paNoError;
+
+ if (!_initialized) {
+ err = Pa_Initialize();
+ }
+ if (err != paNoError) {
+ return;
+ }
+
+ _initialized = true;
+
+ {
+ const PaDeviceInfo* nfo_i = Pa_GetDeviceInfo(Pa_GetDefaultInputDevice());
+ const PaDeviceInfo* nfo_o = Pa_GetDeviceInfo(Pa_GetDefaultOutputDevice());
+ if (nfo_i && nfo_o) {
+ _devices.insert (std::pair<int, paDevice*> (-1,
+ new paDevice("Default",
+ nfo_i->maxInputChannels,
+ nfo_o->maxOutputChannels
+ )));
+ }
+ }
+
+ int n_devices = Pa_GetDeviceCount();
+#ifndef NDEBUG
+ printf("PortAudio %d devices found:\n", n_devices);
+#endif
+
+ for (int i = 0 ; i < n_devices; ++i) {
+ const PaDeviceInfo* nfo = Pa_GetDeviceInfo(i);
+ if (!nfo) continue;
+#ifndef NDEBUG
+ printf(" (%d) '%s' in: %d (lat: %.1f .. %.1f) out: %d (lat: %.1f .. %.1f) sr:%.2f\n",
+ i, nfo->name,
+ nfo->maxInputChannels,
+ nfo->defaultLowInputLatency * 1e3,
+ nfo->defaultHighInputLatency * 1e3,
+ nfo->maxOutputChannels,
+ nfo->defaultLowOutputLatency * 1e3,
+ nfo->defaultHighOutputLatency * 1e3,
+ nfo->defaultSampleRate);
+#endif
+ if ( nfo->maxInputChannels == 0 && nfo->maxOutputChannels == 0) {
+ continue;
+ }
+ _devices.insert (std::pair<int, paDevice*> (i, new paDevice(
+ nfo->name,
+ nfo->maxInputChannels,
+ nfo->maxOutputChannels
+ )));
+ }
+}
+
+void
+PortAudioIO::pcm_stop ()
+{
+ if (_stream) {
+ Pa_CloseStream (_stream);
+ }
+ _stream = NULL;
+
+ _capture_channels = 0;
+ _playback_channels = 0;
+ _cur_sample_rate = 0;
+ _cur_input_latency = 0;
+ _cur_output_latency = 0;
+
+ free (_input_buffer); _input_buffer = NULL;
+ free (_output_buffer); _output_buffer = NULL;
+ _state = -1;
+}
+
+int
+PortAudioIO::pcm_start()
+{
+ PaError err = Pa_StartStream (_stream);
+
+ if (err != paNoError) {
+ _state = -1;
+ return -1;
+ }
+ return 0;
+}
+
+#ifdef __APPLE__
+static uint32_t lower_power_of_two (uint32_t v) {
+ v--;
+ v |= v >> 1;
+ v |= v >> 2;
+ v |= v >> 4;
+ v |= v >> 8;
+ v |= v >> 16;
+ v++;
+ return v >> 1;
+}
+#endif
+
+int
+PortAudioIO::pcm_setup (
+ int device_input, int device_output,
+ double sample_rate, uint32_t samples_per_period)
+{
+ _state = -2;
+
+ // TODO error reporting sans fprintf()
+
+ PaError err = paNoError;
+ const PaDeviceInfo *nfo_in;
+ const PaDeviceInfo *nfo_out;
+ const PaStreamInfo *nfo_s;
+
+ if (!_initialized) {
+ err = Pa_Initialize();
+ }
+ if (err != paNoError) {
+ fprintf(stderr, "PortAudio Initialization Failed\n");
+ goto error;
+ }
+ _initialized = true;
+
+
+ if (device_input == -1) {
+ device_input = Pa_GetDefaultInputDevice();
+ }
+ if (device_output == -1) {
+ device_output = Pa_GetDefaultOutputDevice();
+ }
+
+ _capture_channels = 0;
+ _playback_channels = 0;
+ _cur_sample_rate = 0;
+ _cur_input_latency = 0;
+ _cur_output_latency = 0;
+
+#ifndef NDEBUG
+ printf("PortAudio Device IDs: i:%d o:%d\n", device_input, device_output);
+#endif
+
+ nfo_in = Pa_GetDeviceInfo(device_input);
+ nfo_out = Pa_GetDeviceInfo(device_output);
+
+ if (!nfo_in && ! nfo_out) {
+ fprintf(stderr, "PortAudio Cannot Query Device Info\n");
+ goto error;
+ }
+
+ if (nfo_in) {
+ _capture_channels = nfo_in->maxInputChannels;
+ }
+ if (nfo_out) {
+ _playback_channels = nfo_out->maxOutputChannels;
+ }
+
+ if(_capture_channels == 0 && _playback_channels == 0) {
+ fprintf(stderr, "PortAudio no Input and no output channels.\n");
+ goto error;
+ }
+
+
+#ifdef __APPLE__
+ // pa_mac_core_blocking.c pa_stable_v19_20140130
+ // BUG: ringbuffer alloc requires power-of-two chn count.
+ if ((_capture_channels & (_capture_channels - 1)) != 0) {
+ printf("Adjusted capture channes to power of two (portaudio rb bug)\n");
+ _capture_channels = lower_power_of_two (_capture_channels);
+ }
+
+ if ((_playback_channels & (_playback_channels - 1)) != 0) {
+ printf("Adjusted capture channes to power of two (portaudio rb bug)\n");
+ _playback_channels = lower_power_of_two (_playback_channels);
+ }
+#endif
+
+#ifndef NDEBUG
+ printf("PortAudio Channels: in:%d out:%d\n",
+ _capture_channels, _playback_channels);
+#endif
+
+ PaStreamParameters inputParam;
+ PaStreamParameters outputParam;
+
+ if (nfo_in) {
+ inputParam.device = device_input;
+ inputParam.channelCount = _capture_channels;
+ inputParam.sampleFormat = paFloat32;
+ inputParam.suggestedLatency = nfo_in->defaultLowInputLatency;
+ inputParam.hostApiSpecificStreamInfo = NULL;
+ }
+
+ if (nfo_out) {
+ outputParam.device = device_output;
+ outputParam.channelCount = _playback_channels;
+ outputParam.sampleFormat = paFloat32;
+ outputParam.suggestedLatency = nfo_out->defaultLowOutputLatency;
+ outputParam.hostApiSpecificStreamInfo = NULL;
+ }
+
+ // XXX re-consider using callback API, testing needed.
+ err = Pa_OpenStream (
+ &_stream,
+ _capture_channels > 0 ? &inputParam: NULL,
+ _playback_channels > 0 ? &outputParam: NULL,
+ sample_rate,
+ samples_per_period,
+ paClipOff | paDitherOff,
+ NULL, NULL);
+
+ if (err != paNoError) {
+ fprintf(stderr, "PortAudio failed to start stream.\n");
+ goto error;
+ }
+
+ nfo_s = Pa_GetStreamInfo (_stream);
+ if (!nfo_s) {
+ fprintf(stderr, "PortAudio failed to query stream information.\n");
+ pcm_stop();
+ goto error;
+ }
+
+ _cur_sample_rate = nfo_s->sampleRate;
+ _cur_input_latency = nfo_s->inputLatency * _cur_sample_rate;
+ _cur_output_latency = nfo_s->outputLatency * _cur_sample_rate;
+
+#ifndef NDEBUG
+ printf("PA Sample Rate %.1f SPS\n", _cur_sample_rate);
+ printf("PA Input Latency %.1fms %d spl\n", 1e3 * nfo_s->inputLatency, _cur_input_latency);
+ printf("PA Output Latency %.1fms %d spl\n", 1e3 * nfo_s->outputLatency, _cur_output_latency);
+#endif
+
+ _state = 0;
+
+ if (_capture_channels > 0) {
+ _input_buffer = (float*) malloc (samples_per_period * _capture_channels * sizeof(float));
+ if (!_input_buffer) {
+ fprintf(stderr, "PortAudio failed to allocate input buffer.\n");
+ pcm_stop();
+ goto error;
+ }
+ }
+
+ if (_playback_channels > 0) {
+ _output_buffer = (float*) calloc (samples_per_period * _playback_channels, sizeof(float));
+ if (!_output_buffer) {
+ fprintf(stderr, "PortAudio failed to allocate output buffer.\n");
+ pcm_stop();
+ goto error;
+ }
+ }
+
+ return 0;
+
+error:
+ _capture_channels = 0;
+ _playback_channels = 0;
+ free (_input_buffer); _input_buffer = NULL;
+ free (_output_buffer); _output_buffer = NULL;
+ Pa_Terminate();
+ return -1;
+}
+
+int
+PortAudioIO::next_cycle (uint32_t n_samples)
+{
+ bool xrun = false;
+ PaError err;
+ err = Pa_IsStreamActive (_stream);
+ if (err != 1) {
+ // 0: inactive / aborted
+ // < 0: error
+ return -1;
+ }
+
+ // TODO, check drift.. process part with larger capacity first.
+ // Pa_GetStreamReadAvailable(_stream) < Pa_GetStreamWriteAvailable(_stream)
+
+ if (_playback_channels > 0) {
+ err = Pa_WriteStream (_stream, _output_buffer, n_samples);
+ if (err) xrun = true;
+ }
+
+ if (_capture_channels > 0) {
+ err = Pa_ReadStream (_stream, _input_buffer, n_samples);
+ if (err) {
+ memset (_input_buffer, 0, sizeof(float) * n_samples * _capture_channels);
+ xrun = true;
+ }
+ }
+
+
+ return xrun ? 1 : 0;
+}
+
+int
+PortAudioIO::get_capture_channel (uint32_t chn, float *input, uint32_t n_samples)
+{
+ assert(chn < _capture_channels);
+ const uint32_t stride = _capture_channels;
+ float *ptr = _input_buffer + chn;
+ while (n_samples-- > 0) {
+ *input++ = *ptr;
+ ptr += stride;
+ }
+ return 0;
+}
+
+int
+PortAudioIO::set_playback_channel (uint32_t chn, const float *output, uint32_t n_samples)
+{
+ assert(chn < _playback_channels);
+ const uint32_t stride = _playback_channels;
+ float *ptr = _output_buffer + chn;
+ while (n_samples-- > 0) {
+ *ptr = *output++;
+ ptr += stride;
+ }
+ return 0;
+}
projects / ardour.git / commitdiff