2 * Copyright (C) 2015-2015 Robin Gareus <robin@gareus.org>
3 * Copyright (C) 2013 Paul Davis
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #ifndef PLATFORM_WINDOWS
33 #include "portaudio_backend.h"
34 #include "rt_thread.h"
36 #include "pbd/compose.h"
37 #include "pbd/error.h"
38 #include "pbd/file_utils.h"
39 #include "pbd/windows_timer_utils.h"
40 #include "pbd/windows_mmcss.h"
42 #include "ardour/filesystem_paths.h"
43 #include "ardour/port_manager.h"
46 #include "audio_utils.h"
50 using namespace ARDOUR;
54 const char * const winmme_driver_name = X_("WinMME");
58 static std::string s_instance_name;
59 size_t PortAudioBackend::_max_buffer_size = 8192;
60 std::vector<std::string> PortAudioBackend::_midi_options;
61 std::vector<AudioBackend::DeviceStatus> PortAudioBackend::_input_audio_device_status;
62 std::vector<AudioBackend::DeviceStatus> PortAudioBackend::_output_audio_device_status;
64 PortAudioBackend::PortAudioBackend (AudioEngine& e, AudioBackendInfo& info)
65 : AudioBackend (e, info)
70 , _freewheeling (false)
71 , _freewheel_ack (false)
72 , _reinit_thread_callback (false)
73 , _measure_latency (false)
75 , _total_deviation_us(0)
76 , _max_deviation_us(0)
77 , _input_audio_device("")
78 , _output_audio_device("")
79 , _midi_driver_option(get_standard_device_name(DeviceNone))
81 , _samples_per_period (1024)
84 , _systemic_audio_input_latency (0)
85 , _systemic_audio_output_latency (0)
87 , _processed_samples (0)
88 , _port_change_flag (false)
90 _instance_name = s_instance_name;
91 pthread_mutex_init (&_port_callback_mutex, 0);
92 pthread_mutex_init (&_freewheel_mutex, 0);
93 pthread_cond_init (&_freewheel_signal, 0);
95 _pcmio = new PortAudioIO ();
96 _midiio = new WinMMEMidiIO ();
99 PortAudioBackend::~PortAudioBackend ()
101 delete _pcmio; _pcmio = 0;
102 delete _midiio; _midiio = 0;
104 pthread_mutex_destroy (&_port_callback_mutex);
105 pthread_mutex_destroy (&_freewheel_mutex);
106 pthread_cond_destroy (&_freewheel_signal);
109 /* AUDIOBACKEND API */
112 PortAudioBackend::name () const
114 return X_("PortAudio");
118 PortAudioBackend::is_realtime () const
124 PortAudioBackend::requires_driver_selection() const
126 // we could do this but implementation would need changing
128 if (enumerate_drivers().size() == 1) {
135 std::vector<std::string>
136 PortAudioBackend::enumerate_drivers () const
138 DEBUG_AUDIO ("Portaudio: enumerate_drivers\n");
139 std::vector<std::string> currently_available;
140 _pcmio->host_api_list (currently_available);
141 return currently_available;
145 PortAudioBackend::set_driver (const std::string& name)
147 DEBUG_AUDIO (string_compose ("Portaudio: set_driver %1 \n", name));
148 if (!_pcmio->set_host_api (name)) {
149 DEBUG_AUDIO (string_compose ("Portaudio: Unable to set_driver %1 \n", name));
152 _pcmio->update_devices();
157 PortAudioBackend::update_devices ()
159 return _pcmio->update_devices();
163 PortAudioBackend::driver_name () const
165 std::string driver_name = _pcmio->get_host_api ();
166 DEBUG_AUDIO (string_compose ("Portaudio: driver_name %1 \n", driver_name));
171 PortAudioBackend::use_separate_input_and_output_devices () const
176 std::vector<AudioBackend::DeviceStatus>
177 PortAudioBackend::enumerate_devices () const
179 DEBUG_AUDIO ("Portaudio: ERROR enumerate devices should not be called \n");
180 return std::vector<AudioBackend::DeviceStatus>();
183 std::vector<AudioBackend::DeviceStatus>
184 PortAudioBackend::enumerate_input_devices () const
186 _input_audio_device_status.clear();
187 std::map<int, std::string> input_devices;
188 _pcmio->input_device_list(input_devices);
190 for (std::map<int, std::string>::const_iterator i = input_devices.begin (); i != input_devices.end(); ++i) {
191 if (_input_audio_device == "") _input_audio_device = i->second;
192 _input_audio_device_status.push_back (DeviceStatus (i->second, true));
194 return _input_audio_device_status;
197 std::vector<AudioBackend::DeviceStatus>
198 PortAudioBackend::enumerate_output_devices () const
200 _output_audio_device_status.clear();
201 std::map<int, std::string> output_devices;
202 _pcmio->output_device_list(output_devices);
204 for (std::map<int, std::string>::const_iterator i = output_devices.begin (); i != output_devices.end(); ++i) {
205 if (_output_audio_device == "") _output_audio_device = i->second;
206 _output_audio_device_status.push_back (DeviceStatus (i->second, true));
208 return _output_audio_device_status;
212 PortAudioBackend::available_sample_rates (const std::string&) const
214 DEBUG_AUDIO ("Portaudio: available_sample_rates\n");
215 std::vector<float> sr;
216 _pcmio->available_sample_rates(name_to_id(_input_audio_device), sr);
220 std::vector<uint32_t>
221 PortAudioBackend::available_buffer_sizes (const std::string&) const
223 DEBUG_AUDIO ("Portaudio: available_buffer_sizes\n");
224 std::vector<uint32_t> bs;
225 _pcmio->available_buffer_sizes(name_to_id(_input_audio_device), bs);
230 PortAudioBackend::available_input_channel_count (const std::string&) const
232 return 128; // TODO query current device
236 PortAudioBackend::available_output_channel_count (const std::string&) const
238 return 128; // TODO query current device
242 PortAudioBackend::can_change_sample_rate_when_running () const
248 PortAudioBackend::can_change_buffer_size_when_running () const
250 return false; // TODO
254 PortAudioBackend::set_device_name (const std::string& d)
256 DEBUG_AUDIO ("Portaudio: set_device_name should not be called\n");
261 PortAudioBackend::set_input_device_name (const std::string& d)
263 DEBUG_AUDIO (string_compose ("Portaudio: set_input_device_name %1\n", d));
264 _input_audio_device = d;
269 PortAudioBackend::set_output_device_name (const std::string& d)
271 DEBUG_AUDIO (string_compose ("Portaudio: set_output_device_name %1\n", d));
272 _output_audio_device = d;
277 PortAudioBackend::set_sample_rate (float sr)
279 if (sr <= 0) { return -1; }
280 // TODO check if it's in the list of valid SR
282 engine.sample_rate_change (sr);
287 PortAudioBackend::set_buffer_size (uint32_t bs)
289 if (bs <= 0 || bs >= _max_buffer_size) {
292 _samples_per_period = bs;
293 engine.buffer_size_change (bs);
298 PortAudioBackend::set_interleaved (bool yn)
300 if (!yn) { return 0; }
305 PortAudioBackend::set_input_channels (uint32_t cc)
312 PortAudioBackend::set_output_channels (uint32_t cc)
319 PortAudioBackend::set_systemic_input_latency (uint32_t sl)
321 _systemic_audio_input_latency = sl;
326 PortAudioBackend::set_systemic_output_latency (uint32_t sl)
328 _systemic_audio_output_latency = sl;
332 /* Retrieving parameters */
334 PortAudioBackend::device_name () const
340 PortAudioBackend::input_device_name () const
342 return _input_audio_device;
346 PortAudioBackend::output_device_name () const
348 return _output_audio_device;
352 PortAudioBackend::sample_rate () const
358 PortAudioBackend::buffer_size () const
360 return _samples_per_period;
364 PortAudioBackend::interleaved () const
370 PortAudioBackend::input_channels () const
376 PortAudioBackend::output_channels () const
382 PortAudioBackend::systemic_input_latency () const
384 return _systemic_audio_input_latency;
388 PortAudioBackend::systemic_output_latency () const
390 return _systemic_audio_output_latency;
394 PortAudioBackend::control_app_name () const
396 return _pcmio->control_app_name (name_to_id (_input_audio_device));
400 PortAudioBackend::launch_control_app ()
402 return _pcmio->launch_control_app (name_to_id(_input_audio_device));
407 std::vector<std::string>
408 PortAudioBackend::enumerate_midi_options () const
410 if (_midi_options.empty()) {
411 _midi_options.push_back (winmme_driver_name);
412 _midi_options.push_back (get_standard_device_name(DeviceNone));
414 return _midi_options;
418 PortAudioBackend::set_midi_option (const std::string& opt)
420 if (opt != get_standard_device_name(DeviceNone) && opt != winmme_driver_name) {
423 DEBUG_MIDI (string_compose ("Setting midi option to %1\n", opt));
424 _midi_driver_option = opt;
429 PortAudioBackend::midi_option () const
431 return _midi_driver_option;
436 static void * blocking_thread_func (void *arg)
438 PortAudioBackend *d = static_cast<PortAudioBackend *>(arg);
439 d->blocking_process_thread ();
445 PortAudioBackend::engine_halted ()
447 return !_active && _run;
451 PortAudioBackend::running ()
453 return _active || _run;
457 PortAudioBackend::_start (bool for_latency_measurement)
459 if (engine_halted()) {
464 DEBUG_AUDIO("Already started.\n");
465 return BackendReinitializationError;
470 "Recovering from unclean shutdown, port registry is not empty.\n");
471 _system_inputs.clear();
472 _system_outputs.clear();
473 _system_midi_in.clear();
474 _system_midi_out.clear();
478 /* reset internal state */
480 _freewheeling = false;
483 PaErrorCode err = paNoError;
485 #ifdef USE_BLOCKING_API
486 err = _pcmio->open_blocking_stream(name_to_id(_input_audio_device),
487 name_to_id(_output_audio_device),
489 _samples_per_period);
492 err = _pcmio->open_callback_stream(name_to_id(_input_audio_device),
493 name_to_id(_output_audio_device),
501 // reintepret Portaudio error messages
505 case paBadIODeviceCombination:
506 return DeviceConfigurationNotSupportedError;
507 case paInvalidChannelCount:
508 return ChannelCountNotSupportedError;
509 case paInvalidSampleRate:
510 return SampleRateNotSupportedError;
512 return AudioDeviceOpenError;
515 if (_n_outputs != _pcmio->n_playback_channels ()) {
516 _n_outputs = _pcmio->n_playback_channels ();
517 PBD::info << get_error_string(OutputChannelCountNotSupportedError) << endmsg;
520 if (_n_inputs != _pcmio->n_capture_channels ()) {
521 _n_inputs = _pcmio->n_capture_channels ();
522 PBD::info << get_error_string(InputChannelCountNotSupportedError) << endmsg;
525 if (_pcmio->samples_per_period() != _samples_per_period) {
526 _samples_per_period = _pcmio->samples_per_period();
527 PBD::warning << _("PortAudioBackend: samples per period does not match.") << endmsg;
531 if (_pcmio->sample_rate() != _samplerate) {
532 _samplerate = _pcmio->sample_rate();
533 engine.sample_rate_change (_samplerate);
534 PBD::warning << get_error_string(SampleRateNotSupportedError) << endmsg;
537 _measure_latency = for_latency_measurement;
540 _port_change_flag = false;
542 if (_midi_driver_option == winmme_driver_name) {
543 _midiio->set_enabled(true);
544 //_midiio->set_port_changed_callback(midi_port_change, this);
545 _midiio->start(); // triggers port discovery, callback coremidi_rediscover()
548 _cycle_timer.set_samplerate(_samplerate);
549 _cycle_timer.set_samples_per_cycle(_samples_per_period);
551 _dsp_calc.set_max_time_us (_cycle_timer.get_length_us());
553 DEBUG_MIDI ("Registering MIDI ports\n");
555 if (register_system_midi_ports () != 0) {
556 DEBUG_PORTS("Failed to register system midi ports.\n")
558 return PortRegistrationError;
561 DEBUG_AUDIO ("Registering Audio ports\n");
563 if (register_system_audio_ports()) {
564 DEBUG_PORTS("Failed to register system audio ports.\n");
566 return PortRegistrationError;
569 engine.sample_rate_change (_samplerate);
570 engine.buffer_size_change (_samples_per_period);
572 if (engine.reestablish_ports ()) {
573 DEBUG_PORTS("Could not re-establish ports.\n");
575 return PortReconnectError;
578 engine.reconnect_ports ();
580 _port_change_flag = false;
582 #ifdef USE_BLOCKING_API
583 if (!start_blocking_process_thread()) {
584 return ProcessThreadStartError;
587 if (_pcmio->start_stream() != paNoError) {
588 DEBUG_AUDIO("Unable to start stream\n");
589 return AudioDeviceOpenError;
592 if (!start_freewheel_process_thread()) {
593 DEBUG_AUDIO("Unable to start freewheel thread\n");
595 return ProcessThreadStartError;
603 PortAudioBackend::portaudio_callback(const void* input,
605 unsigned long frame_count,
606 const PaStreamCallbackTimeInfo* time_info,
607 PaStreamCallbackFlags status_flags,
610 PortAudioBackend* pa_backend = static_cast<PortAudioBackend*>(user_data);
612 if (!pa_backend->process_callback((const float*)input,
623 PortAudioBackend::process_callback(const float* input,
625 uint32_t frame_count,
626 const PaStreamCallbackTimeInfo* timeInfo,
627 PaStreamCallbackFlags statusFlags)
631 _dsp_calc.set_start_timestamp_us (PBD::get_microseconds());
633 if (_run && _freewheel && !_freewheel_ack) {
634 // acknowledge freewheeling; hand-over thread ID
635 pthread_mutex_lock (&_freewheel_mutex);
637 DEBUG_AUDIO("Setting _freewheel_ack = true;\n");
638 _freewheel_ack = true;
640 DEBUG_AUDIO("Signalling freewheel thread\n");
641 pthread_cond_signal (&_freewheel_signal);
642 pthread_mutex_unlock (&_freewheel_mutex);
645 if (statusFlags & paInputUnderflow ||
646 statusFlags & paInputOverflow ||
647 statusFlags & paOutputUnderflow ||
648 statusFlags & paOutputOverflow ) {
649 DEBUG_AUDIO("PortAudio: Xrun\n");
654 if (!_run || _freewheel) {
655 memset(output, 0, frame_count * sizeof(float) * _system_outputs.size());
659 bool in_main_thread = pthread_equal(_main_thread, pthread_self());
661 if (_reinit_thread_callback || !in_main_thread) {
662 _reinit_thread_callback = false;
663 _main_thread = pthread_self();
664 AudioEngine::thread_init_callback (this);
667 return blocking_process_main (input, output);
671 PortAudioBackend::start_blocking_process_thread ()
673 if (_realtime_pthread_create (SCHED_FIFO, -20, 100000,
674 &_main_blocking_thread, blocking_thread_func, this))
676 if (pthread_create (&_main_blocking_thread, NULL, blocking_thread_func, this))
678 DEBUG_AUDIO("Failed to create main audio thread\n");
682 PBD::warning << get_error_string(AquireRealtimePermissionError) << endmsg;
687 while (!_active && --timeout > 0) { Glib::usleep (1000); }
689 if (timeout == 0 || !_active) {
690 DEBUG_AUDIO("Failed to start main audio thread\n");
691 _pcmio->close_stream();
701 PortAudioBackend::stop_blocking_process_thread ()
705 if (pthread_join (_main_blocking_thread, &status)) {
706 DEBUG_AUDIO("Failed to stop main audio thread\n");
714 PortAudioBackend::stop ()
724 #ifdef USE_BLOCKING_API
725 if (!stop_blocking_process_thread ()) {
729 _pcmio->close_stream ();
732 if (!stop_freewheel_process_thread ()) {
740 return (_active == false) ? 0 : -1;
743 static void* freewheel_thread(void* arg)
745 PortAudioBackend* d = static_cast<PortAudioBackend*>(arg);
746 d->freewheel_process_thread ();
752 PortAudioBackend::start_freewheel_process_thread ()
754 if (pthread_create(&_pthread_freewheel, NULL, freewheel_thread, this)) {
755 DEBUG_AUDIO("Failed to create main audio thread\n");
760 while (!_freewheel_thread_active && --timeout > 0) { Glib::usleep (1000); }
762 if (timeout == 0 || !_freewheel_thread_active) {
763 DEBUG_AUDIO("Failed to start freewheel thread\n");
770 PortAudioBackend::stop_freewheel_process_thread ()
774 if (!_freewheel_thread_active) {
778 DEBUG_AUDIO("Signaling freewheel thread to stop\n");
780 pthread_mutex_lock (&_freewheel_mutex);
781 pthread_cond_signal (&_freewheel_signal);
782 pthread_mutex_unlock (&_freewheel_mutex);
784 if (pthread_join (_pthread_freewheel, &status) != 0) {
785 DEBUG_AUDIO("Failed to stop freewheel thread\n");
793 PortAudioBackend::freewheel_process_thread()
795 _freewheel_thread_active = true;
797 bool first_run = false;
799 pthread_mutex_lock (&_freewheel_mutex);
802 // check if we should run,
803 if (_freewheeling != _freewheel) {
804 if (!_freewheeling) {
805 DEBUG_AUDIO("Leaving freewheel\n");
806 _freewheel = false; // first mark as disabled
807 _reinit_thread_callback = true; // hand over _main_thread
808 _freewheel_ack = false; // prepare next handshake
809 _midiio->set_enabled(true);
816 if (!_freewheel || !_freewheel_ack) {
817 // wait for a change, we use a timed wait to
818 // terminate early in case some error sets _run = 0
821 gettimeofday (&tv, NULL);
822 ts.tv_sec = tv.tv_sec + 3;
824 DEBUG_AUDIO("Waiting for freewheel change\n");
825 pthread_cond_timedwait (&_freewheel_signal, &_freewheel_mutex, &ts);
830 // tell the engine we're ready to GO.
831 engine.freewheel_callback (_freewheeling);
833 _main_thread = pthread_self();
834 AudioEngine::thread_init_callback (this);
835 _midiio->set_enabled(false);
838 if (!blocking_process_freewheel()) {
843 pthread_mutex_unlock (&_freewheel_mutex);
845 _freewheel_thread_active = false;
848 // engine.process_callback() returner error
849 engine.halted_callback("CoreAudio Freehweeling aborted.");
855 PortAudioBackend::freewheel (bool onoff)
857 if (onoff == _freewheeling) {
860 _freewheeling = onoff;
862 if (0 == pthread_mutex_trylock (&_freewheel_mutex)) {
863 pthread_cond_signal (&_freewheel_signal);
864 pthread_mutex_unlock (&_freewheel_mutex);
870 PortAudioBackend::dsp_load () const
872 return 100.f * _dsp_load;
876 PortAudioBackend::raw_buffer_size (DataType t)
879 case DataType::AUDIO:
880 return _samples_per_period * sizeof(Sample);
882 return _max_buffer_size; // XXX not really limited
889 PortAudioBackend::sample_time ()
891 return _processed_samples;
895 PortAudioBackend::sample_time_at_cycle_start ()
897 return _processed_samples;
901 PortAudioBackend::samples_since_cycle_start ()
903 if (!_active || !_run || _freewheeling || _freewheel) {
906 if (!_cycle_timer.valid()) {
910 return _cycle_timer.samples_since_cycle_start (PBD::get_microseconds());
914 PortAudioBackend::name_to_id(std::string device_name) const {
915 uint32_t device_id = UINT32_MAX;
916 std::map<int, std::string> devices;
917 _pcmio->input_device_list(devices);
918 _pcmio->output_device_list(devices);
920 for (std::map<int, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
921 if (i->second == device_name) {
922 device_id = i->first;
930 PortAudioBackend::set_mmcss_pro_audio (HANDLE* task_handle)
932 bool mmcss_success = PBD::MMCSS::set_thread_characteristics ("Pro Audio", task_handle);
934 if (!mmcss_success) {
935 PBD::warning << get_error_string(SettingAudioThreadPriorityError) << endmsg;
938 DEBUG_THREADS("Thread characteristics set to Pro Audio\n");
941 bool mmcss_priority =
942 PBD::MMCSS::set_thread_priority(*task_handle, PBD::MMCSS::AVRT_PRIORITY_NORMAL);
944 if (!mmcss_priority) {
945 PBD::warning << get_error_string(SettingAudioThreadPriorityError) << endmsg;
948 DEBUG_THREADS("Thread priority set to AVRT_PRIORITY_NORMAL\n");
955 PortAudioBackend::reset_mmcss (HANDLE task_handle)
957 if (!PBD::MMCSS::revert_thread_characteristics(task_handle)) {
958 DEBUG_THREADS("Unable to reset process thread characteristics\n");
965 PortAudioBackend::portaudio_process_thread (void *arg)
967 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
968 boost::function<void ()> f = td->f;
971 #ifdef USE_MMCSS_THREAD_PRIORITIES
973 bool mmcss_success = set_mmcss_pro_audio (&task_handle);
976 DWORD tid = GetCurrentThreadId ();
977 DEBUG_THREADS (string_compose ("Process Thread Child ID: %1\n", tid));
981 #ifdef USE_MMCSS_THREAD_PRIORITIES
983 reset_mmcss (task_handle);
991 PortAudioBackend::create_process_thread (boost::function<void()> func)
995 size_t stacksize = 100000;
997 ThreadData* td = new ThreadData (this, func, stacksize);
999 if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
1000 &thread_id, portaudio_process_thread, td)) {
1001 pthread_attr_init (&attr);
1002 pthread_attr_setstacksize (&attr, stacksize);
1003 if (pthread_create (&thread_id, &attr, portaudio_process_thread, td)) {
1004 DEBUG_AUDIO("Cannot create process thread.");
1005 pthread_attr_destroy (&attr);
1008 pthread_attr_destroy (&attr);
1011 _threads.push_back (thread_id);
1016 PortAudioBackend::join_process_threads ()
1020 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
1023 if (pthread_join (*i, &status)) {
1024 DEBUG_AUDIO("Cannot terminate process thread.");
1033 PortAudioBackend::in_process_thread ()
1035 #ifdef USE_BLOCKING_API
1036 if (pthread_equal (_main_blocking_thread, pthread_self()) != 0) {
1040 if (pthread_equal (_main_thread, pthread_self()) != 0) {
1045 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
1047 if (pthread_equal (*i, pthread_self ()) != 0) {
1055 PortAudioBackend::process_thread_count ()
1057 return _threads.size ();
1061 PortAudioBackend::update_latencies ()
1063 // trigger latency callback in RT thread (locked graph)
1064 port_connect_add_remove_callback();
1067 /* PORTENGINE API */
1070 PortAudioBackend::private_handle () const
1076 PortAudioBackend::my_name () const
1078 return _instance_name;
1082 PortAudioBackend::available () const
1084 return _run && _active;
1088 PortAudioBackend::port_name_size () const
1094 PortAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
1096 if (!valid_port (port)) {
1097 DEBUG_PORTS("set_port_name: Invalid Port(s)\n");
1100 return static_cast<PamPort*>(port)->set_name (_instance_name + ":" + name);
1104 PortAudioBackend::get_port_name (PortEngine::PortHandle port) const
1106 if (!valid_port (port)) {
1107 DEBUG_PORTS("get_port_name: Invalid Port(s)\n");
1108 return std::string ();
1110 return static_cast<PamPort*>(port)->name ();
1114 PortAudioBackend::get_port_property (PortHandle port,
1115 const std::string& key,
1117 std::string& type) const
1119 if (!valid_port (port)) {
1120 DEBUG_PORTS("get_port_name: Invalid Port(s)\n");
1124 if (key == "http://jackaudio.org/metadata/pretty-name") {
1126 value = static_cast<PamPort*>(port)->pretty_name ();
1127 if (!value.empty()) {
1134 PortEngine::PortHandle
1135 PortAudioBackend::get_port_by_name (const std::string& name) const
1137 PortHandle port = (PortHandle) find_port (name);
1142 PortAudioBackend::get_ports (
1143 const std::string& port_name_pattern,
1144 DataType type, PortFlags flags,
1145 std::vector<std::string>& port_names) const
1149 bool use_regexp = false;
1150 if (port_name_pattern.size () > 0) {
1151 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
1155 for (size_t i = 0; i < _ports.size (); ++i) {
1156 PamPort* port = _ports[i];
1157 if ((port->type () == type) && flags == (port->flags () & flags)) {
1158 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
1159 port_names.push_back (port->name ());
1165 regfree (&port_regex);
1171 PortAudioBackend::port_data_type (PortEngine::PortHandle port) const
1173 if (!valid_port (port)) {
1174 return DataType::NIL;
1176 return static_cast<PamPort*>(port)->type ();
1179 PortEngine::PortHandle
1180 PortAudioBackend::register_port (
1181 const std::string& name,
1182 ARDOUR::DataType type,
1183 ARDOUR::PortFlags flags)
1185 if (name.size () == 0) { return 0; }
1186 if (flags & IsPhysical) { return 0; }
1187 return add_port (_instance_name + ":" + name, type, flags);
1190 PortEngine::PortHandle
1191 PortAudioBackend::add_port (
1192 const std::string& name,
1193 ARDOUR::DataType type,
1194 ARDOUR::PortFlags flags)
1196 assert(name.size ());
1197 if (find_port (name)) {
1199 string_compose("register_port: Port already exists: (%1)\n", name));
1202 PamPort* port = NULL;
1204 case DataType::AUDIO:
1205 port = new PortAudioPort(*this, name, flags);
1207 case DataType::MIDI:
1208 port = new PortMidiPort(*this, name, flags);
1211 DEBUG_PORTS("register_port: Invalid Data Type.\n");
1215 _ports.push_back (port);
1221 PortAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
1226 PamPort* port = static_cast<PamPort*>(port_handle);
1227 std::vector<PamPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<PamPort*>(port_handle));
1228 if (i == _ports.end ()) {
1229 DEBUG_PORTS("unregister_port: Failed to find port\n");
1232 disconnect_all(port_handle);
1238 PortAudioBackend::register_system_audio_ports()
1242 const uint32_t a_ins = _n_inputs;
1243 const uint32_t a_out = _n_outputs;
1245 uint32_t capture_latency = 0;
1246 uint32_t playback_latency = 0;
1248 // guard against erroneous latency values
1249 if (_pcmio->capture_latency() > _samples_per_period) {
1250 capture_latency = _pcmio->capture_latency() - _samples_per_period;
1252 if (_pcmio->playback_latency() > _samples_per_period) {
1253 playback_latency = _pcmio->playback_latency() - _samples_per_period;
1257 lr.min = lr.max = capture_latency + (_measure_latency ? 0 : _systemic_audio_input_latency);
1258 for (uint32_t i = 0; i < a_ins; ++i) {
1260 snprintf(tmp, sizeof(tmp), "system:capture_%d", i+1);
1261 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1263 set_latency_range (p, false, lr);
1264 PortAudioPort* audio_port = static_cast<PortAudioPort*>(p);
1265 audio_port->set_pretty_name (
1266 _pcmio->get_input_channel_name (name_to_id (_input_audio_device), i));
1267 _system_inputs.push_back (audio_port);
1270 lr.min = lr.max = playback_latency + (_measure_latency ? 0 : _systemic_audio_output_latency);
1271 for (uint32_t i = 0; i < a_out; ++i) {
1273 snprintf(tmp, sizeof(tmp), "system:playback_%d", i+1);
1274 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1276 set_latency_range (p, true, lr);
1277 PortAudioPort* audio_port = static_cast<PortAudioPort*>(p);
1278 audio_port->set_pretty_name (
1279 _pcmio->get_output_channel_name (name_to_id (_output_audio_device), i));
1280 _system_outputs.push_back(audio_port);
1286 PortAudioBackend::register_system_midi_ports()
1288 if (_midi_driver_option == get_standard_device_name(DeviceNone)) {
1289 DEBUG_MIDI("No MIDI backend selected, not system midi ports available\n");
1294 lr.min = lr.max = _samples_per_period;
1296 const std::vector<WinMMEMidiInputDevice*> inputs = _midiio->get_inputs();
1298 for (std::vector<WinMMEMidiInputDevice*>::const_iterator i = inputs.begin ();
1301 std::string port_name = "system_midi:" + (*i)->name() + " capture";
1303 add_port (port_name,
1305 static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1307 set_latency_range (p, false, lr);
1308 PortMidiPort* midi_port = static_cast<PortMidiPort*>(p);
1309 midi_port->set_pretty_name ((*i)->name());
1310 _system_midi_in.push_back (midi_port);
1311 DEBUG_MIDI (string_compose ("Registered MIDI input port: %1\n", port_name));
1314 const std::vector<WinMMEMidiOutputDevice*> outputs = _midiio->get_outputs();
1316 for (std::vector<WinMMEMidiOutputDevice*>::const_iterator i = outputs.begin ();
1317 i != outputs.end ();
1319 std::string port_name = "system_midi:" + (*i)->name() + " playback";
1321 add_port (port_name,
1323 static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1325 set_latency_range (p, false, lr);
1326 PortMidiPort* midi_port = static_cast<PortMidiPort*>(p);
1327 midi_port->set_n_periods(2);
1328 midi_port->set_pretty_name ((*i)->name());
1329 _system_midi_out.push_back (midi_port);
1330 DEBUG_MIDI (string_compose ("Registered MIDI output port: %1\n", port_name));
1336 PortAudioBackend::unregister_ports (bool system_only)
1339 _system_inputs.clear();
1340 _system_outputs.clear();
1341 _system_midi_in.clear();
1342 _system_midi_out.clear();
1343 while (i < _ports.size ()) {
1344 PamPort* port = _ports[i];
1345 if (! system_only || (port->is_physical () && port->is_terminal ())) {
1346 port->disconnect_all ();
1348 _ports.erase (_ports.begin() + i);
1356 PortAudioBackend::connect (const std::string& src, const std::string& dst)
1358 PamPort* src_port = find_port (src);
1359 PamPort* dst_port = find_port (dst);
1362 DEBUG_PORTS(string_compose("connect: Invalid Source port: (%1)\n", src));
1366 DEBUG_PORTS(string_compose("connect: Invalid Destination port: (%1)\n", dst));
1369 return src_port->connect (dst_port);
1373 PortAudioBackend::disconnect (const std::string& src, const std::string& dst)
1375 PamPort* src_port = find_port (src);
1376 PamPort* dst_port = find_port (dst);
1378 if (!src_port || !dst_port) {
1379 DEBUG_PORTS("disconnect: Invalid Port(s)\n");
1382 return src_port->disconnect (dst_port);
1386 PortAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1388 PamPort* dst_port = find_port (dst);
1389 if (!valid_port (src)) {
1390 DEBUG_PORTS("connect: Invalid Source Port Handle\n");
1394 DEBUG_PORTS(string_compose("connect: Invalid Destination Port (%1)\n", dst));
1397 return static_cast<PamPort*>(src)->connect (dst_port);
1401 PortAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1403 PamPort* dst_port = find_port (dst);
1404 if (!valid_port (src) || !dst_port) {
1405 DEBUG_PORTS("disconnect: Invalid Port(s)\n");
1408 return static_cast<PamPort*>(src)->disconnect (dst_port);
1412 PortAudioBackend::disconnect_all (PortEngine::PortHandle port)
1414 if (!valid_port (port)) {
1415 DEBUG_PORTS("disconnect_all: Invalid Port\n");
1418 static_cast<PamPort*>(port)->disconnect_all ();
1423 PortAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1425 if (!valid_port (port)) {
1426 DEBUG_PORTS("disconnect_all: Invalid Port\n");
1429 return static_cast<PamPort*>(port)->is_connected ();
1433 PortAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1435 PamPort* dst_port = find_port (dst);
1436 if (!valid_port (src) || !dst_port) {
1437 DEBUG_PORTS("connected_to: Invalid Port\n");
1440 return static_cast<PamPort*>(src)->is_connected (dst_port);
1444 PortAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1446 if (!valid_port (port)) {
1447 DEBUG_PORTS("physically_connected: Invalid Port\n");
1450 return static_cast<PamPort*>(port)->is_physically_connected ();
1454 PortAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1456 if (!valid_port (port)) {
1457 DEBUG_PORTS("get_connections: Invalid Port\n");
1461 assert (0 == names.size ());
1463 const std::vector<PamPort*>& connected_ports = static_cast<PamPort*>(port)->get_connections ();
1465 for (std::vector<PamPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1466 names.push_back ((*i)->name ());
1469 return (int)names.size ();
1474 PortAudioBackend::midi_event_get (
1475 pframes_t& timestamp,
1476 size_t& size, uint8_t** buf, void* port_buffer,
1477 uint32_t event_index)
1479 if (!buf || !port_buffer) return -1;
1480 PortMidiBuffer& source = * static_cast<PortMidiBuffer*>(port_buffer);
1481 if (event_index >= source.size ()) {
1484 PortMidiEvent * const event = source[event_index].get ();
1486 timestamp = event->timestamp ();
1487 size = event->size ();
1488 *buf = event->data ();
1493 PortAudioBackend::midi_event_put (
1495 pframes_t timestamp,
1496 const uint8_t* buffer, size_t size)
1498 if (!buffer || !port_buffer) return -1;
1499 PortMidiBuffer& dst = * static_cast<PortMidiBuffer*>(port_buffer);
1500 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1501 // nevermind, ::get_buffer() sorts events
1502 DEBUG_MIDI (string_compose ("PortMidiBuffer: unordered event: %1 > %2\n",
1503 (pframes_t)dst.back ()->timestamp (),
1506 dst.push_back (boost::shared_ptr<PortMidiEvent>(new PortMidiEvent (timestamp, buffer, size)));
1511 PortAudioBackend::get_midi_event_count (void* port_buffer)
1513 if (!port_buffer) return 0;
1514 return static_cast<PortMidiBuffer*>(port_buffer)->size ();
1518 PortAudioBackend::midi_clear (void* port_buffer)
1520 if (!port_buffer) return;
1521 PortMidiBuffer * buf = static_cast<PortMidiBuffer*>(port_buffer);
1529 PortAudioBackend::can_monitor_input () const
1535 PortAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1541 PortAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1547 PortAudioBackend::monitoring_input (PortEngine::PortHandle)
1552 /* Latency management */
1555 PortAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1557 if (!valid_port (port)) {
1558 DEBUG_PORTS("PamPort::set_latency_range (): invalid port.\n");
1560 static_cast<PamPort*>(port)->set_latency_range (latency_range, for_playback);
1564 PortAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1567 if (!valid_port (port)) {
1568 DEBUG_PORTS("PamPort::get_latency_range (): invalid port.\n");
1573 PamPort* p = static_cast<PamPort*>(port);
1576 r = p->latency_range (for_playback);
1578 if (p->is_physical() && p->is_terminal() && p->type() == DataType::AUDIO) {
1579 if (p->is_input() && for_playback) {
1580 r.min += _samples_per_period;
1581 r.max += _samples_per_period;
1583 if (p->is_output() && !for_playback) {
1584 r.min += _samples_per_period;
1585 r.max += _samples_per_period;
1591 /* Discovering physical ports */
1594 PortAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1596 if (!valid_port (port)) {
1597 DEBUG_PORTS("PamPort::port_is_physical (): invalid port.\n");
1600 return static_cast<PamPort*>(port)->is_physical ();
1604 PortAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1606 for (size_t i = 0; i < _ports.size (); ++i) {
1607 PamPort* port = _ports[i];
1608 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1609 port_names.push_back (port->name ());
1615 PortAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1617 for (size_t i = 0; i < _ports.size (); ++i) {
1618 PamPort* port = _ports[i];
1619 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1620 port_names.push_back (port->name ());
1626 PortAudioBackend::n_physical_outputs () const
1630 for (size_t i = 0; i < _ports.size (); ++i) {
1631 PamPort* port = _ports[i];
1632 if (port->is_output () && port->is_physical ()) {
1633 switch (port->type ()) {
1634 case DataType::AUDIO:
1637 case DataType::MIDI:
1646 cc.set (DataType::AUDIO, n_audio);
1647 cc.set (DataType::MIDI, n_midi);
1652 PortAudioBackend::n_physical_inputs () const
1656 for (size_t i = 0; i < _ports.size (); ++i) {
1657 PamPort* port = _ports[i];
1658 if (port->is_input () && port->is_physical ()) {
1659 switch (port->type ()) {
1660 case DataType::AUDIO:
1663 case DataType::MIDI:
1672 cc.set (DataType::AUDIO, n_audio);
1673 cc.set (DataType::MIDI, n_midi);
1677 /* Getting access to the data buffer for a port */
1680 PortAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1682 if (!port || !valid_port (port)) return NULL;
1683 return static_cast<PamPort*>(port)->get_buffer (nframes);
1688 PortAudioBackend::blocking_process_thread ()
1690 AudioEngine::thread_init_callback (this);
1692 _processed_samples = 0;
1694 manager.registration_callback();
1695 manager.graph_order_callback();
1697 if (_pcmio->start_stream() != paNoError) {
1698 _pcmio->close_stream ();
1700 engine.halted_callback(get_error_string(AudioDeviceIOError).c_str());
1703 #ifdef USE_MMCSS_THREAD_PRIORITIES
1705 bool mmcss_success = set_mmcss_pro_audio (&task_handle);
1708 DWORD tid = GetCurrentThreadId ();
1709 DEBUG_THREADS (string_compose ("Process Thread Master ID: %1\n", tid));
1713 if (_freewheeling != _freewheel) {
1714 _freewheel = _freewheeling;
1715 engine.freewheel_callback (_freewheel);
1720 switch (_pcmio->next_cycle (_samples_per_period)) {
1724 DEBUG_AUDIO("PortAudio: Xrun\n");
1728 PBD::error << get_error_string(AudioDeviceIOError) << endmsg;
1732 if (!blocking_process_main(_pcmio->get_capture_buffer(),
1733 _pcmio->get_playback_buffer())) {
1738 if (!blocking_process_freewheel()) {
1743 process_port_connection_changes();
1745 _pcmio->close_stream();
1748 engine.halted_callback(get_error_string(AudioDeviceIOError).c_str());
1751 #ifdef USE_MMCSS_THREAD_PRIORITIES
1752 if (mmcss_success) {
1753 reset_mmcss(task_handle);
1761 PortAudioBackend::blocking_process_main(const float* interleaved_input_data,
1762 float* interleaved_output_data)
1765 int64_t min_elapsed_us = 1000000;
1766 int64_t max_elapsed_us = 0;
1768 _dsp_calc.set_start_timestamp_us (PBD::get_microseconds());
1771 /* Copy input audio data into input port buffers */
1772 for (std::vector<PamPort*>::const_iterator it = _system_inputs.begin();
1773 it != _system_inputs.end();
1775 assert(_system_inputs.size() == _pcmio->n_capture_channels());
1776 uint32_t channels = _system_inputs.size();
1777 float* input_port_buffer = (float*)(*it)->get_buffer(_samples_per_period);
1778 deinterleave_audio_data(
1779 interleaved_input_data, input_port_buffer, _samples_per_period, i, channels);
1782 process_incoming_midi ();
1784 /* clear output buffers */
1785 for (std::vector<PamPort*>::const_iterator it = _system_outputs.begin();
1786 it != _system_outputs.end();
1788 memset((*it)->get_buffer(_samples_per_period),
1790 _samples_per_period * sizeof(Sample));
1793 _last_cycle_start = _cycle_timer.get_start();
1794 _cycle_timer.reset_start(PBD::get_microseconds());
1797 uint64_t cycle_diff_us = (_cycle_timer.get_start() - _last_cycle_start);
1798 int64_t deviation_us = (cycle_diff_us - _cycle_timer.get_length_us());
1799 _total_deviation_us += ::llabs(deviation_us);
1801 std::max(_max_deviation_us, (uint64_t)::llabs(deviation_us));
1803 if ((_cycle_count % 1000) == 0) {
1804 uint64_t mean_deviation_us = _total_deviation_us / _cycle_count;
1805 DEBUG_TIMING(string_compose("Mean avg cycle deviation: %1(ms), max %2(ms)\n",
1806 mean_deviation_us * 1e-3,
1807 _max_deviation_us * 1e-3));
1810 if (::llabs(deviation_us) > _cycle_timer.get_length_us()) {
1812 string_compose("time between process(ms): %1, Est(ms): %2, Dev(ms): %3\n",
1813 cycle_diff_us * 1e-3,
1814 _cycle_timer.get_length_us() * 1e-3,
1815 deviation_us * 1e-3));
1818 /* call engine process callback */
1819 if (engine.process_callback(_samples_per_period)) {
1820 _pcmio->close_stream();
1825 process_outgoing_midi ();
1827 /* write back audio */
1829 for (std::vector<PamPort*>::const_iterator it = _system_outputs.begin();
1830 it != _system_outputs.end();
1832 assert(_system_outputs.size() == _pcmio->n_playback_channels());
1833 const uint32_t channels = _system_outputs.size();
1834 float* output_port_buffer = (float*)(*it)->get_buffer(_samples_per_period);
1835 interleave_audio_data(
1836 output_port_buffer, interleaved_output_data, _samples_per_period, i, channels);
1839 _processed_samples += _samples_per_period;
1841 /* calculate DSP load */
1842 _dsp_calc.set_stop_timestamp_us (PBD::get_microseconds());
1843 _dsp_load = _dsp_calc.get_dsp_load();
1845 DEBUG_TIMING(string_compose("DSP Load: %1\n", _dsp_load));
1847 max_elapsed_us = std::max(_dsp_calc.elapsed_time_us(), max_elapsed_us);
1848 min_elapsed_us = std::min(_dsp_calc.elapsed_time_us(), min_elapsed_us);
1849 if ((_cycle_count % 1000) == 0) {
1850 DEBUG_TIMING(string_compose("Elapsed process time(usecs) max: %1, min: %2\n",
1859 PortAudioBackend::blocking_process_freewheel()
1861 // zero audio input buffers
1862 for (std::vector<PamPort*>::const_iterator it = _system_inputs.begin();
1863 it != _system_inputs.end();
1865 memset((*it)->get_buffer(_samples_per_period),
1867 _samples_per_period * sizeof(Sample));
1870 // TODO clear midi or stop midi recv when entering fwheelin'
1872 if (engine.process_callback(_samples_per_period)) {
1873 _pcmio->close_stream();
1878 // drop all outgoing MIDI messages
1879 for (std::vector<PamPort*>::const_iterator it = _system_midi_out.begin();
1880 it != _system_midi_out.end();
1882 void* bptr = (*it)->get_buffer(0);
1887 Glib::usleep(100); // don't hog cpu
1892 PortAudioBackend::process_incoming_midi ()
1895 for (std::vector<PamPort*>::const_iterator it = _system_midi_in.begin();
1896 it != _system_midi_in.end();
1898 PortMidiBuffer* mbuf = static_cast<PortMidiBuffer*>((*it)->get_buffer(0));
1901 pframes_t sample_offset;
1903 size_t size = sizeof(data);
1904 while (_midiio->dequeue_input_event(i,
1905 _cycle_timer.get_start(),
1906 _cycle_timer.get_next_start(),
1910 sample_offset = _cycle_timer.samples_since_cycle_start(timestamp);
1911 midi_event_put(mbuf, sample_offset, data, size);
1912 DEBUG_MIDI(string_compose("Dequeuing incoming MIDI data for device: %1 "
1913 "sample_offset: %2 timestamp: %3, size: %4\n",
1914 _midiio->get_inputs()[i]->name(),
1918 size = sizeof(data);
1924 PortAudioBackend::process_outgoing_midi ()
1927 for (std::vector<PamPort*>::iterator it = _system_midi_out.begin();
1928 it != _system_midi_out.end();
1930 static_cast<PortMidiPort*>(*it)->next_period();
1932 /* queue outgoing midi */
1934 for (std::vector<PamPort*>::const_iterator it = _system_midi_out.begin();
1935 it != _system_midi_out.end();
1937 const PortMidiBuffer* src =
1938 static_cast<const PortMidiPort*>(*it)->const_buffer();
1940 for (PortMidiBuffer::const_iterator mit = src->begin(); mit != src->end();
1942 uint64_t timestamp =
1943 _cycle_timer.timestamp_from_sample_offset((*mit)->timestamp());
1944 DEBUG_MIDI(string_compose("Queuing outgoing MIDI data for device: "
1945 "%1 sample_offset: %2 timestamp: %3, size: %4\n",
1946 _midiio->get_outputs()[i]->name(),
1947 (*mit)->timestamp(),
1950 _midiio->enqueue_output_event(i, timestamp, (*mit)->data(), (*mit)->size());
1956 PortAudioBackend::process_port_connection_changes ()
1958 bool connections_changed = false;
1959 bool ports_changed = false;
1960 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1961 if (_port_change_flag) {
1962 ports_changed = true;
1963 _port_change_flag = false;
1965 if (!_port_connection_queue.empty ()) {
1966 connections_changed = true;
1968 while (!_port_connection_queue.empty ()) {
1969 PortConnectData *c = _port_connection_queue.back ();
1970 manager.connect_callback (c->a, c->b, c->c);
1971 _port_connection_queue.pop_back ();
1974 pthread_mutex_unlock (&_port_callback_mutex);
1976 if (ports_changed) {
1977 manager.registration_callback();
1979 if (connections_changed) {
1980 manager.graph_order_callback();
1982 if (connections_changed || ports_changed) {
1983 engine.latency_callback(false);
1984 engine.latency_callback(true);
1988 /******************************************************************************/
1990 static boost::shared_ptr<PortAudioBackend> _instance;
1992 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1993 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1994 static int deinstantiate ();
1995 static bool already_configured ();
1996 static bool available ();
1998 static ARDOUR::AudioBackendInfo _descriptor = {
2007 static boost::shared_ptr<AudioBackend>
2008 backend_factory (AudioEngine& e)
2011 _instance.reset (new PortAudioBackend (e, _descriptor));
2017 instantiate (const std::string& arg1, const std::string& /* arg2 */)
2019 s_instance_name = arg1;
2031 already_configured ()
2042 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
2044 return &_descriptor;
2048 /******************************************************************************/
2049 PamPort::PamPort (PortAudioBackend &b, const std::string& name, PortFlags flags)
2054 _capture_latency_range.min = 0;
2055 _capture_latency_range.max = 0;
2056 _playback_latency_range.min = 0;
2057 _playback_latency_range.max = 0;
2060 PamPort::~PamPort () {
2065 int PamPort::connect (PamPort *port)
2068 DEBUG_PORTS("PamPort::connect (): invalid (null) port\n");
2072 if (type () != port->type ()) {
2073 DEBUG_PORTS("PamPort::connect (): wrong port-type\n");
2077 if (is_output () && port->is_output ()) {
2078 DEBUG_PORTS("PamPort::connect (): cannot inter-connect output ports.\n");
2082 if (is_input () && port->is_input ()) {
2083 DEBUG_PORTS("PamPort::connect (): cannot inter-connect input ports.\n");
2088 DEBUG_PORTS("PamPort::connect (): cannot self-connect ports.\n");
2092 if (is_connected (port)) {
2093 #if 0 // don't bother to warn about this for now. just ignore it
2094 PBD::error << _("PamPort::connect (): ports are already connected:")
2095 << " (" << name () << ") -> (" << port->name () << ")"
2101 _connect (port, true);
2106 void PamPort::_connect (PamPort *port, bool callback)
2108 _connections.push_back (port);
2110 port->_connect (this, false);
2111 _osx_backend.port_connect_callback (name(), port->name(), true);
2115 int PamPort::disconnect (PamPort *port)
2118 DEBUG_PORTS("PamPort::disconnect (): invalid (null) port\n");
2122 if (!is_connected (port)) {
2123 DEBUG_PORTS(string_compose(
2124 "PamPort::disconnect (): ports are not connected: (%1) -> (%2)\n",
2129 _disconnect (port, true);
2133 void PamPort::_disconnect (PamPort *port, bool callback)
2135 std::vector<PamPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
2137 assert (it != _connections.end ());
2139 _connections.erase (it);
2142 port->_disconnect (this, false);
2143 _osx_backend.port_connect_callback (name(), port->name(), false);
2148 void PamPort::disconnect_all ()
2150 while (!_connections.empty ()) {
2151 _connections.back ()->_disconnect (this, false);
2152 _osx_backend.port_connect_callback (name(), _connections.back ()->name(), false);
2153 _connections.pop_back ();
2158 PamPort::is_connected (const PamPort *port) const
2160 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
2163 bool PamPort::is_physically_connected () const
2165 for (std::vector<PamPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
2166 if ((*it)->is_physical ()) {
2173 /******************************************************************************/
2175 PortAudioPort::PortAudioPort (PortAudioBackend &b, const std::string& name, PortFlags flags)
2176 : PamPort (b, name, flags)
2178 memset (_buffer, 0, sizeof (_buffer));
2179 #ifndef PLATFORM_WINDOWS
2180 mlock(_buffer, sizeof (_buffer));
2184 PortAudioPort::~PortAudioPort () { }
2186 void* PortAudioPort::get_buffer (pframes_t n_samples)
2189 std::vector<PamPort*>::const_iterator it = get_connections ().begin ();
2190 if (it == get_connections ().end ()) {
2191 memset (_buffer, 0, n_samples * sizeof (Sample));
2193 PortAudioPort const * source = static_cast<const PortAudioPort*>(*it);
2194 assert (source && source->is_output ());
2195 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
2196 while (++it != get_connections ().end ()) {
2197 source = static_cast<const PortAudioPort*>(*it);
2198 assert (source && source->is_output ());
2199 Sample* dst = buffer ();
2200 const Sample* src = source->const_buffer ();
2201 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
2211 PortMidiPort::PortMidiPort (PortAudioBackend &b, const std::string& name, PortFlags flags)
2212 : PamPort (b, name, flags)
2216 _buffer[0].clear ();
2217 _buffer[1].clear ();
2220 PortMidiPort::~PortMidiPort () { }
2222 struct MidiEventSorter {
2223 bool operator() (const boost::shared_ptr<PortMidiEvent>& a, const boost::shared_ptr<PortMidiEvent>& b) {
2228 void* PortMidiPort::get_buffer (pframes_t /* nframes */)
2231 (_buffer[_bufperiod]).clear ();
2232 for (std::vector<PamPort*>::const_iterator i = get_connections ().begin ();
2233 i != get_connections ().end ();
2235 const PortMidiBuffer * src = static_cast<const PortMidiPort*>(*i)->const_buffer ();
2236 for (PortMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2237 (_buffer[_bufperiod]).push_back (boost::shared_ptr<PortMidiEvent>(new PortMidiEvent (**it)));
2240 std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
2242 return &(_buffer[_bufperiod]);
2245 PortMidiEvent::PortMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2247 , _timestamp (timestamp)
2251 _data = (uint8_t*) malloc (size);
2252 memcpy (_data, data, size);
2256 PortMidiEvent::PortMidiEvent (const PortMidiEvent& other)
2257 : _size (other.size ())
2258 , _timestamp (other.timestamp ())
2261 if (other.size () && other.const_data ()) {
2262 _data = (uint8_t*) malloc (other.size ());
2263 memcpy (_data, other.const_data (), other.size ());
2267 PortMidiEvent::~PortMidiEvent () {