2 * Copyright (C) 2014 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.
26 #include "dummy_audiobackend.h"
28 #include "pbd/error.h"
29 #include "ardour/port_manager.h"
32 using namespace ARDOUR;
34 static std::string s_instance_name;
35 size_t DummyAudioBackend::_max_buffer_size = 8192;
36 std::vector<std::string> DummyAudioBackend::_midi_options;
37 std::vector<AudioBackend::DeviceStatus> DummyAudioBackend::_device_status;
39 DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
40 : AudioBackend (e, info)
42 , _freewheeling (false)
45 , _samples_per_period (1024)
51 , _systemic_input_latency (0)
52 , _systemic_output_latency (0)
53 , _processed_samples (0)
54 , _port_change_flag (false)
56 _instance_name = s_instance_name;
57 pthread_mutex_init (&_port_callback_mutex, 0);
60 DummyAudioBackend::~DummyAudioBackend ()
62 pthread_mutex_destroy (&_port_callback_mutex);
65 /* AUDIOBACKEND API */
68 DummyAudioBackend::name () const
74 DummyAudioBackend::is_realtime () const
79 std::vector<AudioBackend::DeviceStatus>
80 DummyAudioBackend::enumerate_devices () const
82 if (_device_status.empty()) {
83 _device_status.push_back (DeviceStatus (_("Silence"), true));
84 _device_status.push_back (DeviceStatus (_("Sine Wave"), true));
85 _device_status.push_back (DeviceStatus (_("White Noise"), true));
86 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
87 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
89 return _device_status;
93 DummyAudioBackend::available_sample_rates (const std::string&) const
95 std::vector<float> sr;
96 sr.push_back (8000.0);
97 sr.push_back (22050.0);
98 sr.push_back (24000.0);
99 sr.push_back (44100.0);
100 sr.push_back (48000.0);
101 sr.push_back (88200.0);
102 sr.push_back (96000.0);
103 sr.push_back (176400.0);
104 sr.push_back (192000.0);
108 std::vector<uint32_t>
109 DummyAudioBackend::available_buffer_sizes (const std::string&) const
111 std::vector<uint32_t> bs;
128 DummyAudioBackend::available_input_channel_count (const std::string&) const
134 DummyAudioBackend::available_output_channel_count (const std::string&) const
140 DummyAudioBackend::can_change_sample_rate_when_running () const
146 DummyAudioBackend::can_change_buffer_size_when_running () const
152 DummyAudioBackend::set_device_name (const std::string& d)
159 DummyAudioBackend::set_sample_rate (float sr)
161 if (sr <= 0) { return -1; }
163 engine.sample_rate_change (sr);
168 DummyAudioBackend::set_buffer_size (uint32_t bs)
170 if (bs <= 0 || bs >= _max_buffer_size) {
173 _samples_per_period = bs;
174 engine.buffer_size_change (bs);
179 DummyAudioBackend::set_interleaved (bool yn)
181 if (!yn) { return 0; }
186 DummyAudioBackend::set_input_channels (uint32_t cc)
193 DummyAudioBackend::set_output_channels (uint32_t cc)
200 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
202 _systemic_input_latency = sl;
207 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
209 _systemic_output_latency = sl;
213 /* Retrieving parameters */
215 DummyAudioBackend::device_name () const
221 DummyAudioBackend::sample_rate () const
227 DummyAudioBackend::buffer_size () const
229 return _samples_per_period;
233 DummyAudioBackend::interleaved () const
239 DummyAudioBackend::input_channels () const
245 DummyAudioBackend::output_channels () const
251 DummyAudioBackend::systemic_input_latency () const
253 return _systemic_input_latency;
257 DummyAudioBackend::systemic_output_latency () const
259 return _systemic_output_latency;
264 std::vector<std::string>
265 DummyAudioBackend::enumerate_midi_options () const
267 if (_midi_options.empty()) {
268 _midi_options.push_back (_("1 in, 1 out"));
269 _midi_options.push_back (_("2 in, 2 out"));
270 _midi_options.push_back (_("8 in, 8 out"));
272 return _midi_options;
276 DummyAudioBackend::set_midi_option (const std::string& opt)
278 if (opt == _("1 in, 1 out")) {
279 _n_midi_inputs = _n_midi_outputs = 1;
281 else if (opt == _("2 in, 2 out")) {
282 _n_midi_inputs = _n_midi_outputs = 2;
284 else if (opt == _("8 in, 8 out")) {
285 _n_midi_inputs = _n_midi_outputs = 8;
288 _n_midi_inputs = _n_midi_outputs = 0;
294 DummyAudioBackend::midi_option () const
301 static void * pthread_process (void *arg)
303 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
304 d->main_process_thread ();
310 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
313 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
318 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
319 _system_inputs.clear();
323 if (register_system_ports()) {
324 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
328 engine.sample_rate_change (_samplerate);
329 engine.buffer_size_change (_samples_per_period);
331 if (engine.reestablish_ports ()) {
332 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
337 engine.reconnect_ports ();
338 _port_change_flag = false;
340 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
341 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
345 while (!_running && --timeout > 0) { Glib::usleep (1000); }
347 if (timeout == 0 || !_running) {
348 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
356 DummyAudioBackend::stop ()
364 if (pthread_join (_main_thread, &status)) {
365 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
368 unregister_system_ports();
373 DummyAudioBackend::freewheel (bool onoff)
375 if (onoff == _freewheeling) {
378 _freewheeling = onoff;
379 engine.freewheel_callback (onoff);
384 DummyAudioBackend::dsp_load () const
386 return 100.f * _dsp_load;
390 DummyAudioBackend::raw_buffer_size (DataType t)
393 case DataType::AUDIO:
394 return _samples_per_period * sizeof(Sample);
396 return _max_buffer_size; // XXX not really limited
403 DummyAudioBackend::sample_time ()
405 return _processed_samples;
409 DummyAudioBackend::sample_time_at_cycle_start ()
411 return _processed_samples;
415 DummyAudioBackend::samples_since_cycle_start ()
422 DummyAudioBackend::dummy_process_thread (void *arg)
424 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
425 boost::function<void ()> f = td->f;
432 DummyAudioBackend::create_process_thread (boost::function<void()> func)
436 size_t stacksize = 100000;
438 pthread_attr_init (&attr);
439 pthread_attr_setstacksize (&attr, stacksize);
440 ThreadData* td = new ThreadData (this, func, stacksize);
442 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
443 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
444 pthread_attr_destroy (&attr);
447 pthread_attr_destroy (&attr);
449 _threads.push_back (thread_id);
454 DummyAudioBackend::join_process_threads ()
458 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
461 if (pthread_join (*i, &status)) {
462 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
471 DummyAudioBackend::in_process_thread ()
473 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
475 if (pthread_equal (*i, pthread_self ()) != 0) {
483 DummyAudioBackend::process_thread_count ()
485 return _threads.size ();
489 DummyAudioBackend::update_latencies ()
491 // trigger latency callback in RT thread (locked graph)
492 port_connect_add_remove_callback();
498 DummyAudioBackend::private_handle () const
504 DummyAudioBackend::my_name () const
506 return _instance_name;
510 DummyAudioBackend::available () const
516 DummyAudioBackend::port_name_size () const
522 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
524 if (!valid_port (port)) {
525 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
528 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
532 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
534 if (!valid_port (port)) {
535 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
536 return std::string ();
538 return static_cast<DummyPort*>(port)->name ();
541 PortEngine::PortHandle
542 DummyAudioBackend::get_port_by_name (const std::string& name) const
544 PortHandle port = (PortHandle) find_port (name);
549 DummyAudioBackend::get_ports (
550 const std::string& port_name_pattern,
551 DataType type, PortFlags flags,
552 std::vector<std::string>& port_names) const
556 bool use_regexp = false;
557 if (port_name_pattern.size () > 0) {
558 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
562 for (size_t i = 0; i < _ports.size (); ++i) {
563 DummyPort* port = _ports[i];
564 if ((port->type () == type) && (port->flags () & flags)) {
565 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
566 port_names.push_back (port->name ());
572 regfree (&port_regex);
578 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
580 if (!valid_port (port)) {
581 return DataType::NIL;
583 return static_cast<DummyPort*>(port)->type ();
586 PortEngine::PortHandle
587 DummyAudioBackend::register_port (
588 const std::string& name,
589 ARDOUR::DataType type,
590 ARDOUR::PortFlags flags)
592 if (name.size () == 0) { return 0; }
593 if (flags & IsPhysical) { return 0; }
594 return add_port (_instance_name + ":" + name, type, flags);
597 PortEngine::PortHandle
598 DummyAudioBackend::add_port (
599 const std::string& name,
600 ARDOUR::DataType type,
601 ARDOUR::PortFlags flags)
603 assert(name.size ());
604 if (find_port (name)) {
605 PBD::error << _("DummyBackend::register_port: Port already exists:")
606 << " (" << name << ")" << endmsg;
609 DummyPort* port = NULL;
611 case DataType::AUDIO:
612 port = new DummyAudioPort (*this, name, flags);
615 port = new DummyMidiPort (*this, name, flags);
618 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
622 _ports.push_back (port);
628 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
630 if (!valid_port (port_handle)) {
631 PBD::error << _("DummyBackend::unregister_port: Invalid Port.") << endmsg;
633 DummyPort* port = static_cast<DummyPort*>(port_handle);
634 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
635 if (i == _ports.end ()) {
636 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
639 disconnect_all(port_handle);
645 DummyAudioBackend::register_system_ports()
648 enum DummyAudioPort::GeneratorType gt;
649 if (_device == _("White Noise")) {
650 gt = DummyAudioPort::WhiteNoise;
651 } else if (_device == _("Pink Noise")) {
652 gt = DummyAudioPort::PinkNoise;
653 } else if (_device == _("Pink Noise (low CPU)")) {
654 gt = DummyAudioPort::PonyNoise;
655 } else if (_device == _("Sine Wave")) {
656 gt = DummyAudioPort::SineWave;
658 gt = DummyAudioPort::Silence;
661 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
662 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
663 const int m_ins = _n_midi_inputs > 0 ? _n_midi_inputs : 2;
664 const int m_out = _n_midi_outputs > 0 ? _n_midi_outputs : 2;
667 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
668 for (int i = 1; i <= a_ins; ++i) {
670 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
671 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
673 set_latency_range (p, false, lr);
674 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
675 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
678 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
679 for (int i = 1; i <= a_out; ++i) {
681 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
682 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
684 set_latency_range (p, true, lr);
688 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
689 for (int i = 1; i <= m_ins; ++i) {
691 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
692 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
694 set_latency_range (p, false, lr);
697 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
698 for (int i = 1; i <= m_out; ++i) {
700 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
701 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
703 set_latency_range (p, true, lr);
709 DummyAudioBackend::unregister_system_ports()
712 _system_inputs.clear();
713 while (i < _ports.size ()) {
714 DummyPort* port = _ports[i];
715 if (port->is_physical () && port->is_terminal ()) {
716 port->disconnect_all ();
717 _ports.erase (_ports.begin() + i);
725 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
727 DummyPort* src_port = find_port (src);
728 DummyPort* dst_port = find_port (dst);
731 PBD::error << _("DummyBackend::connect: Invalid Source port:")
732 << " (" << src <<")" << endmsg;
736 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
737 << " (" << dst <<")" << endmsg;
740 return src_port->connect (dst_port);
744 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
746 DummyPort* src_port = find_port (src);
747 DummyPort* dst_port = find_port (dst);
749 if (!src_port || !dst_port) {
750 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
753 return src_port->disconnect (dst_port);
757 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
759 DummyPort* dst_port = find_port (dst);
760 if (!valid_port (src)) {
761 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
765 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
766 << " (" << dst << ")" << endmsg;
769 return static_cast<DummyPort*>(src)->connect (dst_port);
773 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
775 DummyPort* dst_port = find_port (dst);
776 if (!valid_port (src) || !dst_port) {
777 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
780 return static_cast<DummyPort*>(src)->disconnect (dst_port);
784 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
786 if (!valid_port (port)) {
787 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
790 static_cast<DummyPort*>(port)->disconnect_all ();
795 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
797 if (!valid_port (port)) {
798 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
801 return static_cast<DummyPort*>(port)->is_connected ();
805 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
807 DummyPort* dst_port = find_port (dst);
808 if (!valid_port (src) || !dst_port) {
809 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
812 return static_cast<DummyPort*>(src)->is_connected (dst_port);
816 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
818 if (!valid_port (port)) {
819 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
822 return static_cast<DummyPort*>(port)->is_physically_connected ();
826 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
828 if (!valid_port (port)) {
829 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
833 assert (0 == names.size ());
835 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
837 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
838 names.push_back ((*i)->name ());
841 return (int)names.size ();
846 DummyAudioBackend::midi_event_get (
847 pframes_t& timestamp,
848 size_t& size, uint8_t** buf, void* port_buffer,
849 uint32_t event_index)
851 assert (buf && port_buffer);
852 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
853 if (event_index >= source.size ()) {
856 DummyMidiEvent * const event = source[event_index].get ();
858 timestamp = event->timestamp ();
859 size = event->size ();
860 *buf = event->data ();
865 DummyAudioBackend::midi_event_put (
868 const uint8_t* buffer, size_t size)
870 assert (buffer && port_buffer);
871 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
872 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
873 fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
876 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
881 DummyAudioBackend::get_midi_event_count (void* port_buffer)
883 assert (port_buffer);
884 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
888 DummyAudioBackend::midi_clear (void* port_buffer)
890 assert (port_buffer);
891 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
899 DummyAudioBackend::can_monitor_input () const
905 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
911 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
917 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
922 /* Latency management */
925 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
927 if (!valid_port (port)) {
928 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
930 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
934 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
936 if (!valid_port (port)) {
937 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
943 return static_cast<DummyPort*>(port)->latency_range (for_playback);
946 /* Discovering physical ports */
949 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
951 if (!valid_port (port)) {
952 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
955 return static_cast<DummyPort*>(port)->is_physical ();
959 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
961 for (size_t i = 0; i < _ports.size (); ++i) {
962 DummyPort* port = _ports[i];
963 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
964 port_names.push_back (port->name ());
970 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
972 for (size_t i = 0; i < _ports.size (); ++i) {
973 DummyPort* port = _ports[i];
974 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
975 port_names.push_back (port->name ());
981 DummyAudioBackend::n_physical_outputs () const
985 for (size_t i = 0; i < _ports.size (); ++i) {
986 DummyPort* port = _ports[i];
987 if (port->is_output () && port->is_physical ()) {
988 switch (port->type ()) {
989 case DataType::AUDIO: ++n_audio; break;
990 case DataType::MIDI: ++n_midi; break;
996 cc.set (DataType::AUDIO, n_audio);
997 cc.set (DataType::MIDI, n_midi);
1002 DummyAudioBackend::n_physical_inputs () const
1006 for (size_t i = 0; i < _ports.size (); ++i) {
1007 DummyPort* port = _ports[i];
1008 if (port->is_input () && port->is_physical ()) {
1009 switch (port->type ()) {
1010 case DataType::AUDIO: ++n_audio; break;
1011 case DataType::MIDI: ++n_midi; break;
1017 cc.set (DataType::AUDIO, n_audio);
1018 cc.set (DataType::MIDI, n_midi);
1022 /* Getting access to the data buffer for a port */
1025 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1028 assert (valid_port (port));
1029 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1032 /* Engine Process */
1034 DummyAudioBackend::main_process_thread ()
1036 AudioEngine::thread_init_callback (this);
1038 _processed_samples = 0;
1040 manager.registration_callback();
1041 manager.graph_order_callback();
1043 uint64_t clock1, clock2;
1044 clock1 = g_get_monotonic_time();
1047 // re-set input buffers, generate on demand.
1048 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1049 (*it)->next_period();
1052 if (engine.process_callback (_samples_per_period)) {
1055 _processed_samples += _samples_per_period;
1056 if (!_freewheeling) {
1057 clock2 = g_get_monotonic_time();
1058 const int64_t elapsed_time = clock2 - clock1;
1059 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1060 _dsp_load = elapsed_time / (float) nomial_time;
1061 if (elapsed_time < nomial_time) {
1062 Glib::usleep (nomial_time - elapsed_time);
1064 Glib::usleep (100); // don't hog cpu
1068 Glib::usleep (100); // don't hog cpu
1070 clock1 = g_get_monotonic_time();
1072 bool connections_changed = false;
1073 bool ports_changed = false;
1074 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1075 if (_port_change_flag) {
1076 ports_changed = true;
1077 _port_change_flag = false;
1079 if (!_port_connection_queue.empty ()) {
1080 connections_changed = true;
1082 while (!_port_connection_queue.empty ()) {
1083 PortConnectData *c = _port_connection_queue.back ();
1084 manager.connect_callback (c->a, c->b, c->c);
1085 _port_connection_queue.pop_back ();
1088 pthread_mutex_unlock (&_port_callback_mutex);
1090 if (ports_changed) {
1091 manager.registration_callback();
1093 if (connections_changed) {
1094 manager.graph_order_callback();
1096 if (connections_changed || ports_changed) {
1097 engine.latency_callback(false);
1098 engine.latency_callback(true);
1107 /******************************************************************************/
1109 static boost::shared_ptr<DummyAudioBackend> _instance;
1111 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1112 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1113 static int deinstantiate ();
1114 static bool already_configured ();
1116 static ARDOUR::AudioBackendInfo _descriptor = {
1124 static boost::shared_ptr<AudioBackend>
1125 backend_factory (AudioEngine& e)
1128 _instance.reset (new DummyAudioBackend (e, _descriptor));
1134 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1136 s_instance_name = arg1;
1148 already_configured ()
1153 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1155 return &_descriptor;
1159 /******************************************************************************/
1160 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1161 : _dummy_backend (b)
1165 _capture_latency_range.min = 0;
1166 _capture_latency_range.max = 0;
1167 _playback_latency_range.min = 0;
1168 _playback_latency_range.max = 0;
1169 _dummy_backend.port_connect_add_remove_callback();
1172 DummyPort::~DummyPort () {
1174 _dummy_backend.port_connect_add_remove_callback();
1178 int DummyPort::connect (DummyPort *port)
1181 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1185 if (type () != port->type ()) {
1186 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1190 if (is_output () && port->is_output ()) {
1191 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1195 if (is_input () && port->is_input ()) {
1196 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1201 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1205 if (is_connected (port)) {
1206 #if 0 // don't bother to warn about this for now. just ignore it
1207 PBD::error << _("DummyPort::connect (): ports are already connected:")
1208 << " (" << name () << ") -> (" << port->name () << ")"
1214 _connect (port, true);
1219 void DummyPort::_connect (DummyPort *port, bool callback)
1221 _connections.push_back (port);
1223 port->_connect (this, false);
1224 _dummy_backend.port_connect_callback (name(), port->name(), true);
1228 int DummyPort::disconnect (DummyPort *port)
1231 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1235 if (!is_connected (port)) {
1236 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1237 << " (" << name () << ") -> (" << port->name () << ")"
1241 _disconnect (port, true);
1245 void DummyPort::_disconnect (DummyPort *port, bool callback)
1247 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1249 assert (it != _connections.end ());
1251 _connections.erase (it);
1254 port->_disconnect (this, false);
1255 _dummy_backend.port_connect_callback (name(), port->name(), false);
1260 void DummyPort::disconnect_all ()
1262 while (!_connections.empty ()) {
1263 _connections.back ()->_disconnect (this, false);
1264 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1265 _connections.pop_back ();
1270 DummyPort::is_connected (const DummyPort *port) const
1272 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1275 bool DummyPort::is_physically_connected () const
1277 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1278 if ((*it)->is_physical ()) {
1285 /******************************************************************************/
1287 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1288 : DummyPort (b, name, flags)
1289 , _gen_type (Silence)
1290 , _gen_cycle (false)
1304 memset (_buffer, 0, sizeof (_buffer));
1307 DummyAudioPort::~DummyAudioPort () {
1312 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1315 _rseed = g_get_monotonic_time() % UINT_MAX;
1316 #ifdef COMPILER_MSVC
1320 switch (_gen_type) {
1328 #ifdef COMPILER_MSVC
1329 const unsigned int rnd = rand ();
1331 const unsigned int rnd = rand_r (&_rseed);
1333 _tbl_length = 5 + rnd % (int)(samplerate / 20.f);
1334 _wavetable = (Sample*) malloc( _tbl_length * sizeof(Sample));
1335 for (uint32_t i = 0 ; i < _tbl_length; ++i) {
1336 _wavetable[i] = .12589f * sinf(2.0 * M_PI * (float)i / (float)_tbl_length);
1343 static inline float randf (unsigned int *seedp) {
1344 static const float rmf = RAND_MAX / 2.0;
1345 // TODO this should use a better uniform random generator
1346 #ifdef COMPILER_MSVC
1347 return ((float)rand () / rmf) - 1.f;
1349 return ((float)rand_r (seedp) / rmf) - 1.f;
1353 float DummyAudioPort::grandf ()
1355 // Gaussian White Noise
1356 // http://www.musicdsp.org/archive.php?classid=0#109
1365 x1 = randf (&_rseed);
1366 x2 = randf (&_rseed);
1367 r = x1 * x1 + x2 * x2;
1368 } while ((r >= 1.0f) || (r < 1e-22f));
1370 r = sqrtf (-2.f * logf (r) / r);
1377 void DummyAudioPort::generate (const pframes_t n_samples)
1379 Glib::Threads::Mutex::Lock lm (generator_lock);
1384 switch (_gen_type) {
1386 memset (_buffer, 0, n_samples * sizeof (Sample));
1389 assert(_wavetable && _tbl_length > 0);
1391 pframes_t written = 0;
1392 while (written < n_samples) {
1393 const uint32_t remain = n_samples - written;
1394 const uint32_t to_copy = std::min(remain, _tbl_length - _tbl_offset);
1395 memcpy((void*)&_buffer[written],
1396 (void*)&_wavetable[_tbl_offset],
1397 to_copy * sizeof(Sample));
1399 _tbl_offset = (_tbl_offset + to_copy) % _tbl_length;
1404 for (pframes_t i = 0 ; i < n_samples; ++i) {
1405 _buffer[i] = .089125f * grandf();
1409 for (pframes_t i = 0 ; i < n_samples; ++i) {
1410 // Paul Kellet's refined method
1411 // http://www.musicdsp.org/files/pink.txt
1412 // NB. If 'white' consists of uniform random numbers,
1413 // the pink noise will have an almost gaussian distribution.
1414 const float white = .0498f * randf(&_rseed);
1415 _b0 = .99886f * _b0 + white * .0555179f;
1416 _b1 = .99332f * _b1 + white * .0750759f;
1417 _b2 = .96900f * _b2 + white * .1538520f;
1418 _b3 = .86650f * _b3 + white * .3104856f;
1419 _b4 = .55000f * _b4 + white * .5329522f;
1420 _b5 = -.7616f * _b5 - white * .0168980f;
1421 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362;
1422 _b6 = white * 0.115926;
1426 for (pframes_t i = 0 ; i < n_samples; ++i) {
1427 const float white = 0.0498f * randf(&_rseed);
1428 // Paul Kellet's economy method
1429 // http://www.musicdsp.org/files/pink.txt
1430 _b0 = 0.99765 * _b0 + white * 0.0990460;
1431 _b1 = 0.96300 * _b1 + white * 0.2965164;
1432 _b2 = 0.57000 * _b2 + white * 1.0526913;
1433 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848;
1440 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1443 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1444 if (it == get_connections ().end ()) {
1445 memset (_buffer, 0, n_samples * sizeof (Sample));
1447 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1448 assert (source && source->is_output ());
1449 if (source->is_physical() && source->is_terminal()) {
1450 source->get_buffer(n_samples); // generate signal.
1452 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1453 while (++it != get_connections ().end ()) {
1454 source = static_cast<DummyAudioPort*>(*it);
1455 assert (source && source->is_output ());
1456 Sample* dst = buffer ();
1457 if (source->is_physical() && source->is_terminal()) {
1458 source->get_buffer(n_samples); // generate signal.
1460 const Sample* src = source->const_buffer ();
1461 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1466 } else if (is_output () && is_physical () && is_terminal()) {
1468 generate(n_samples);
1475 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1476 : DummyPort (b, name, flags)
1481 DummyMidiPort::~DummyMidiPort () { }
1483 struct MidiEventSorter {
1484 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1489 void* DummyMidiPort::get_buffer (pframes_t /* nframes */)
1493 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1494 i != get_connections ().end ();
1496 const DummyMidiBuffer src = static_cast<const DummyMidiPort*>(*i)->const_buffer ();
1497 for (DummyMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
1498 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1501 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1502 } else if (is_output () && is_physical () && is_terminal()) {
1508 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1510 , _timestamp (timestamp)
1514 _data = (uint8_t*) malloc (size);
1515 memcpy (_data, data, size);
1519 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
1520 : _size (other.size ())
1521 , _timestamp (other.timestamp ())
1524 if (other.size () && other.const_data ()) {
1525 _data = (uint8_t*) malloc (other.size ());
1526 memcpy (_data, other.const_data (), other.size ());
1530 DummyMidiEvent::~DummyMidiEvent () {