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 (_("Uniform White Noise"), true));
86 _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
87 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
88 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
90 return _device_status;
94 DummyAudioBackend::available_sample_rates (const std::string&) const
96 std::vector<float> sr;
97 sr.push_back (8000.0);
98 sr.push_back (22050.0);
99 sr.push_back (24000.0);
100 sr.push_back (44100.0);
101 sr.push_back (48000.0);
102 sr.push_back (88200.0);
103 sr.push_back (96000.0);
104 sr.push_back (176400.0);
105 sr.push_back (192000.0);
109 std::vector<uint32_t>
110 DummyAudioBackend::available_buffer_sizes (const std::string&) const
112 std::vector<uint32_t> bs;
129 DummyAudioBackend::available_input_channel_count (const std::string&) const
135 DummyAudioBackend::available_output_channel_count (const std::string&) const
141 DummyAudioBackend::can_change_sample_rate_when_running () const
147 DummyAudioBackend::can_change_buffer_size_when_running () const
153 DummyAudioBackend::set_device_name (const std::string& d)
160 DummyAudioBackend::set_sample_rate (float sr)
162 if (sr <= 0) { return -1; }
164 engine.sample_rate_change (sr);
169 DummyAudioBackend::set_buffer_size (uint32_t bs)
171 if (bs <= 0 || bs >= _max_buffer_size) {
174 _samples_per_period = bs;
175 engine.buffer_size_change (bs);
180 DummyAudioBackend::set_interleaved (bool yn)
182 if (!yn) { return 0; }
187 DummyAudioBackend::set_input_channels (uint32_t cc)
194 DummyAudioBackend::set_output_channels (uint32_t cc)
201 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
203 _systemic_input_latency = sl;
208 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
210 _systemic_output_latency = sl;
214 /* Retrieving parameters */
216 DummyAudioBackend::device_name () const
222 DummyAudioBackend::sample_rate () const
228 DummyAudioBackend::buffer_size () const
230 return _samples_per_period;
234 DummyAudioBackend::interleaved () const
240 DummyAudioBackend::input_channels () const
246 DummyAudioBackend::output_channels () const
252 DummyAudioBackend::systemic_input_latency () const
254 return _systemic_input_latency;
258 DummyAudioBackend::systemic_output_latency () const
260 return _systemic_output_latency;
265 std::vector<std::string>
266 DummyAudioBackend::enumerate_midi_options () const
268 if (_midi_options.empty()) {
269 _midi_options.push_back (_("1 in, 1 out"));
270 _midi_options.push_back (_("2 in, 2 out"));
271 _midi_options.push_back (_("8 in, 8 out"));
273 return _midi_options;
277 DummyAudioBackend::set_midi_option (const std::string& opt)
279 if (opt == _("1 in, 1 out")) {
280 _n_midi_inputs = _n_midi_outputs = 1;
282 else if (opt == _("2 in, 2 out")) {
283 _n_midi_inputs = _n_midi_outputs = 2;
285 else if (opt == _("8 in, 8 out")) {
286 _n_midi_inputs = _n_midi_outputs = 8;
289 _n_midi_inputs = _n_midi_outputs = 0;
295 DummyAudioBackend::midi_option () const
302 static void * pthread_process (void *arg)
304 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
305 d->main_process_thread ();
311 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
314 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
319 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
320 _system_inputs.clear();
324 if (register_system_ports()) {
325 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
329 engine.sample_rate_change (_samplerate);
330 engine.buffer_size_change (_samples_per_period);
332 if (engine.reestablish_ports ()) {
333 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
338 engine.reconnect_ports ();
339 _port_change_flag = false;
341 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
342 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
346 while (!_running && --timeout > 0) { Glib::usleep (1000); }
348 if (timeout == 0 || !_running) {
349 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
357 DummyAudioBackend::stop ()
365 if (pthread_join (_main_thread, &status)) {
366 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
369 unregister_system_ports();
374 DummyAudioBackend::freewheel (bool onoff)
376 if (onoff == _freewheeling) {
379 _freewheeling = onoff;
380 engine.freewheel_callback (onoff);
385 DummyAudioBackend::dsp_load () const
387 return 100.f * _dsp_load;
391 DummyAudioBackend::raw_buffer_size (DataType t)
394 case DataType::AUDIO:
395 return _samples_per_period * sizeof(Sample);
397 return _max_buffer_size; // XXX not really limited
404 DummyAudioBackend::sample_time ()
406 return _processed_samples;
410 DummyAudioBackend::sample_time_at_cycle_start ()
412 return _processed_samples;
416 DummyAudioBackend::samples_since_cycle_start ()
423 DummyAudioBackend::dummy_process_thread (void *arg)
425 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
426 boost::function<void ()> f = td->f;
433 DummyAudioBackend::create_process_thread (boost::function<void()> func)
437 size_t stacksize = 100000;
439 pthread_attr_init (&attr);
440 pthread_attr_setstacksize (&attr, stacksize);
441 ThreadData* td = new ThreadData (this, func, stacksize);
443 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
444 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
445 pthread_attr_destroy (&attr);
448 pthread_attr_destroy (&attr);
450 _threads.push_back (thread_id);
455 DummyAudioBackend::join_process_threads ()
459 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
462 if (pthread_join (*i, &status)) {
463 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
472 DummyAudioBackend::in_process_thread ()
474 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
476 if (pthread_equal (*i, pthread_self ()) != 0) {
484 DummyAudioBackend::process_thread_count ()
486 return _threads.size ();
490 DummyAudioBackend::update_latencies ()
492 // trigger latency callback in RT thread (locked graph)
493 port_connect_add_remove_callback();
499 DummyAudioBackend::private_handle () const
505 DummyAudioBackend::my_name () const
507 return _instance_name;
511 DummyAudioBackend::available () const
517 DummyAudioBackend::port_name_size () const
523 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
525 if (!valid_port (port)) {
526 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
529 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
533 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
535 if (!valid_port (port)) {
536 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
537 return std::string ();
539 return static_cast<DummyPort*>(port)->name ();
542 PortEngine::PortHandle
543 DummyAudioBackend::get_port_by_name (const std::string& name) const
545 PortHandle port = (PortHandle) find_port (name);
550 DummyAudioBackend::get_ports (
551 const std::string& port_name_pattern,
552 DataType type, PortFlags flags,
553 std::vector<std::string>& port_names) const
557 bool use_regexp = false;
558 if (port_name_pattern.size () > 0) {
559 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
563 for (size_t i = 0; i < _ports.size (); ++i) {
564 DummyPort* port = _ports[i];
565 if ((port->type () == type) && (port->flags () & flags)) {
566 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
567 port_names.push_back (port->name ());
573 regfree (&port_regex);
579 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
581 if (!valid_port (port)) {
582 return DataType::NIL;
584 return static_cast<DummyPort*>(port)->type ();
587 PortEngine::PortHandle
588 DummyAudioBackend::register_port (
589 const std::string& name,
590 ARDOUR::DataType type,
591 ARDOUR::PortFlags flags)
593 if (name.size () == 0) { return 0; }
594 if (flags & IsPhysical) { return 0; }
595 return add_port (_instance_name + ":" + name, type, flags);
598 PortEngine::PortHandle
599 DummyAudioBackend::add_port (
600 const std::string& name,
601 ARDOUR::DataType type,
602 ARDOUR::PortFlags flags)
604 assert(name.size ());
605 if (find_port (name)) {
606 PBD::error << _("DummyBackend::register_port: Port already exists:")
607 << " (" << name << ")" << endmsg;
610 DummyPort* port = NULL;
612 case DataType::AUDIO:
613 port = new DummyAudioPort (*this, name, flags);
616 port = new DummyMidiPort (*this, name, flags);
619 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
623 _ports.push_back (port);
629 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
631 if (!valid_port (port_handle)) {
632 PBD::error << _("DummyBackend::unregister_port: Invalid Port.") << endmsg;
634 DummyPort* port = static_cast<DummyPort*>(port_handle);
635 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
636 if (i == _ports.end ()) {
637 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
640 disconnect_all(port_handle);
646 DummyAudioBackend::register_system_ports()
649 enum DummyAudioPort::GeneratorType gt;
650 if (_device == _("Uniform White Noise")) {
651 gt = DummyAudioPort::UniformWhiteNoise;
652 } else if (_device == _("Gaussian White Noise")) {
653 gt = DummyAudioPort::GaussianWhiteNoise;
654 } else if (_device == _("Pink Noise")) {
655 gt = DummyAudioPort::PinkNoise;
656 } else if (_device == _("Pink Noise (low CPU)")) {
657 gt = DummyAudioPort::PonyNoise;
658 } else if (_device == _("Sine Wave")) {
659 gt = DummyAudioPort::SineWave;
661 gt = DummyAudioPort::Silence;
664 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
665 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
666 const int m_ins = _n_midi_inputs > 0 ? _n_midi_inputs : 2;
667 const int m_out = _n_midi_outputs > 0 ? _n_midi_outputs : 2;
670 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
671 for (int i = 1; i <= a_ins; ++i) {
673 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
674 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
676 set_latency_range (p, false, lr);
677 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
678 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
681 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
682 for (int i = 1; i <= a_out; ++i) {
684 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
685 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
687 set_latency_range (p, true, lr);
691 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
692 for (int i = 1; i <= m_ins; ++i) {
694 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
695 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
697 set_latency_range (p, false, lr);
700 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
701 for (int i = 1; i <= m_out; ++i) {
703 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
704 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
706 set_latency_range (p, true, lr);
712 DummyAudioBackend::unregister_system_ports()
715 _system_inputs.clear();
716 while (i < _ports.size ()) {
717 DummyPort* port = _ports[i];
718 if (port->is_physical () && port->is_terminal ()) {
719 port->disconnect_all ();
720 _ports.erase (_ports.begin() + i);
728 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
730 DummyPort* src_port = find_port (src);
731 DummyPort* dst_port = find_port (dst);
734 PBD::error << _("DummyBackend::connect: Invalid Source port:")
735 << " (" << src <<")" << endmsg;
739 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
740 << " (" << dst <<")" << endmsg;
743 return src_port->connect (dst_port);
747 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
749 DummyPort* src_port = find_port (src);
750 DummyPort* dst_port = find_port (dst);
752 if (!src_port || !dst_port) {
753 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
756 return src_port->disconnect (dst_port);
760 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
762 DummyPort* dst_port = find_port (dst);
763 if (!valid_port (src)) {
764 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
768 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
769 << " (" << dst << ")" << endmsg;
772 return static_cast<DummyPort*>(src)->connect (dst_port);
776 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
778 DummyPort* dst_port = find_port (dst);
779 if (!valid_port (src) || !dst_port) {
780 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
783 return static_cast<DummyPort*>(src)->disconnect (dst_port);
787 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
789 if (!valid_port (port)) {
790 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
793 static_cast<DummyPort*>(port)->disconnect_all ();
798 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
800 if (!valid_port (port)) {
801 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
804 return static_cast<DummyPort*>(port)->is_connected ();
808 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
810 DummyPort* dst_port = find_port (dst);
811 if (!valid_port (src) || !dst_port) {
812 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
815 return static_cast<DummyPort*>(src)->is_connected (dst_port);
819 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
821 if (!valid_port (port)) {
822 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
825 return static_cast<DummyPort*>(port)->is_physically_connected ();
829 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
831 if (!valid_port (port)) {
832 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
836 assert (0 == names.size ());
838 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
840 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
841 names.push_back ((*i)->name ());
844 return (int)names.size ();
849 DummyAudioBackend::midi_event_get (
850 pframes_t& timestamp,
851 size_t& size, uint8_t** buf, void* port_buffer,
852 uint32_t event_index)
854 assert (buf && port_buffer);
855 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
856 if (event_index >= source.size ()) {
859 DummyMidiEvent * const event = source[event_index].get ();
861 timestamp = event->timestamp ();
862 size = event->size ();
863 *buf = event->data ();
868 DummyAudioBackend::midi_event_put (
871 const uint8_t* buffer, size_t size)
873 assert (buffer && port_buffer);
874 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
875 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
876 fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
879 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
884 DummyAudioBackend::get_midi_event_count (void* port_buffer)
886 assert (port_buffer);
887 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
891 DummyAudioBackend::midi_clear (void* port_buffer)
893 assert (port_buffer);
894 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
902 DummyAudioBackend::can_monitor_input () const
908 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
914 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
920 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
925 /* Latency management */
928 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
930 if (!valid_port (port)) {
931 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
933 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
937 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
939 if (!valid_port (port)) {
940 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
946 return static_cast<DummyPort*>(port)->latency_range (for_playback);
949 /* Discovering physical ports */
952 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
954 if (!valid_port (port)) {
955 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
958 return static_cast<DummyPort*>(port)->is_physical ();
962 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
964 for (size_t i = 0; i < _ports.size (); ++i) {
965 DummyPort* port = _ports[i];
966 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
967 port_names.push_back (port->name ());
973 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
975 for (size_t i = 0; i < _ports.size (); ++i) {
976 DummyPort* port = _ports[i];
977 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
978 port_names.push_back (port->name ());
984 DummyAudioBackend::n_physical_outputs () const
988 for (size_t i = 0; i < _ports.size (); ++i) {
989 DummyPort* port = _ports[i];
990 if (port->is_output () && port->is_physical ()) {
991 switch (port->type ()) {
992 case DataType::AUDIO: ++n_audio; break;
993 case DataType::MIDI: ++n_midi; break;
999 cc.set (DataType::AUDIO, n_audio);
1000 cc.set (DataType::MIDI, n_midi);
1005 DummyAudioBackend::n_physical_inputs () const
1009 for (size_t i = 0; i < _ports.size (); ++i) {
1010 DummyPort* port = _ports[i];
1011 if (port->is_input () && port->is_physical ()) {
1012 switch (port->type ()) {
1013 case DataType::AUDIO: ++n_audio; break;
1014 case DataType::MIDI: ++n_midi; break;
1020 cc.set (DataType::AUDIO, n_audio);
1021 cc.set (DataType::MIDI, n_midi);
1025 /* Getting access to the data buffer for a port */
1028 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1031 assert (valid_port (port));
1032 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1035 /* Engine Process */
1037 DummyAudioBackend::main_process_thread ()
1039 AudioEngine::thread_init_callback (this);
1041 _processed_samples = 0;
1043 manager.registration_callback();
1044 manager.graph_order_callback();
1046 uint64_t clock1, clock2;
1047 clock1 = g_get_monotonic_time();
1050 // re-set input buffers, generate on demand.
1051 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1052 (*it)->next_period();
1055 if (engine.process_callback (_samples_per_period)) {
1058 _processed_samples += _samples_per_period;
1059 if (!_freewheeling) {
1060 clock2 = g_get_monotonic_time();
1061 const int64_t elapsed_time = clock2 - clock1;
1062 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1063 _dsp_load = elapsed_time / (float) nomial_time;
1064 if (elapsed_time < nomial_time) {
1065 Glib::usleep (nomial_time - elapsed_time);
1067 Glib::usleep (100); // don't hog cpu
1071 Glib::usleep (100); // don't hog cpu
1073 clock1 = g_get_monotonic_time();
1075 bool connections_changed = false;
1076 bool ports_changed = false;
1077 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1078 if (_port_change_flag) {
1079 ports_changed = true;
1080 _port_change_flag = false;
1082 if (!_port_connection_queue.empty ()) {
1083 connections_changed = true;
1085 while (!_port_connection_queue.empty ()) {
1086 PortConnectData *c = _port_connection_queue.back ();
1087 manager.connect_callback (c->a, c->b, c->c);
1088 _port_connection_queue.pop_back ();
1091 pthread_mutex_unlock (&_port_callback_mutex);
1093 if (ports_changed) {
1094 manager.registration_callback();
1096 if (connections_changed) {
1097 manager.graph_order_callback();
1099 if (connections_changed || ports_changed) {
1100 engine.latency_callback(false);
1101 engine.latency_callback(true);
1110 /******************************************************************************/
1112 static boost::shared_ptr<DummyAudioBackend> _instance;
1114 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1115 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1116 static int deinstantiate ();
1117 static bool already_configured ();
1119 static ARDOUR::AudioBackendInfo _descriptor = {
1127 static boost::shared_ptr<AudioBackend>
1128 backend_factory (AudioEngine& e)
1131 _instance.reset (new DummyAudioBackend (e, _descriptor));
1137 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1139 s_instance_name = arg1;
1151 already_configured ()
1156 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1158 return &_descriptor;
1162 /******************************************************************************/
1163 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1164 : _dummy_backend (b)
1168 _capture_latency_range.min = 0;
1169 _capture_latency_range.max = 0;
1170 _playback_latency_range.min = 0;
1171 _playback_latency_range.max = 0;
1172 _dummy_backend.port_connect_add_remove_callback();
1175 DummyPort::~DummyPort () {
1177 _dummy_backend.port_connect_add_remove_callback();
1181 int DummyPort::connect (DummyPort *port)
1184 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1188 if (type () != port->type ()) {
1189 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1193 if (is_output () && port->is_output ()) {
1194 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1198 if (is_input () && port->is_input ()) {
1199 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1204 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1208 if (is_connected (port)) {
1209 #if 0 // don't bother to warn about this for now. just ignore it
1210 PBD::error << _("DummyPort::connect (): ports are already connected:")
1211 << " (" << name () << ") -> (" << port->name () << ")"
1217 _connect (port, true);
1222 void DummyPort::_connect (DummyPort *port, bool callback)
1224 _connections.push_back (port);
1226 port->_connect (this, false);
1227 _dummy_backend.port_connect_callback (name(), port->name(), true);
1231 int DummyPort::disconnect (DummyPort *port)
1234 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1238 if (!is_connected (port)) {
1239 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1240 << " (" << name () << ") -> (" << port->name () << ")"
1244 _disconnect (port, true);
1248 void DummyPort::_disconnect (DummyPort *port, bool callback)
1250 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1252 assert (it != _connections.end ());
1254 _connections.erase (it);
1257 port->_disconnect (this, false);
1258 _dummy_backend.port_connect_callback (name(), port->name(), false);
1263 void DummyPort::disconnect_all ()
1265 while (!_connections.empty ()) {
1266 _connections.back ()->_disconnect (this, false);
1267 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1268 _connections.pop_back ();
1273 DummyPort::is_connected (const DummyPort *port) const
1275 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1278 bool DummyPort::is_physically_connected () const
1280 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1281 if ((*it)->is_physical ()) {
1288 /******************************************************************************/
1290 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1291 : DummyPort (b, name, flags)
1292 , _gen_type (Silence)
1293 , _gen_cycle (false)
1307 memset (_buffer, 0, sizeof (_buffer));
1310 DummyAudioPort::~DummyAudioPort () {
1315 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1318 _rseed = g_get_monotonic_time() % UINT_MAX;
1320 switch (_gen_type) {
1323 case UniformWhiteNoise:
1324 case GaussianWhiteNoise:
1329 _tbl_length = 5 + randi() % (int)(samplerate / 20.f);
1330 _wavetable = (Sample*) malloc( _tbl_length * sizeof(Sample));
1331 for (uint32_t i = 0 ; i < _tbl_length; ++i) {
1332 _wavetable[i] = .12589f * sinf(2.0 * M_PI * (float)i / (float)_tbl_length);
1340 DummyAudioPort::randi ()
1342 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1343 // http://www.firstpr.com.au/dsp/rand31/
1345 lo = 16807 * (_rseed & 0xffff);
1346 hi = 16807 * (_rseed >> 16);
1348 lo += (hi & 0x7fff) << 16;
1351 lo = (lo & 0x7fffffff) + (lo >> 31);
1353 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1355 return (_rseed = lo);
1359 DummyAudioPort::randf ()
1361 return (randi() / 1073741824.f) - 1.f;
1364 float DummyAudioPort::grandf ()
1366 // Gaussian White Noise
1367 // http://www.musicdsp.org/archive.php?classid=0#109
1378 r = x1 * x1 + x2 * x2;
1379 } while ((r >= 1.0f) || (r < 1e-22f));
1381 r = sqrtf (-2.f * logf (r) / r);
1388 void DummyAudioPort::generate (const pframes_t n_samples)
1390 Glib::Threads::Mutex::Lock lm (generator_lock);
1395 switch (_gen_type) {
1397 memset (_buffer, 0, n_samples * sizeof (Sample));
1400 assert(_wavetable && _tbl_length > 0);
1402 pframes_t written = 0;
1403 while (written < n_samples) {
1404 const uint32_t remain = n_samples - written;
1405 const uint32_t to_copy = std::min(remain, _tbl_length - _tbl_offset);
1406 memcpy((void*)&_buffer[written],
1407 (void*)&_wavetable[_tbl_offset],
1408 to_copy * sizeof(Sample));
1410 _tbl_offset = (_tbl_offset + to_copy) % _tbl_length;
1414 case UniformWhiteNoise:
1415 for (pframes_t i = 0 ; i < n_samples; ++i) {
1416 _buffer[i] = .158489f * randf();
1419 case GaussianWhiteNoise:
1420 for (pframes_t i = 0 ; i < n_samples; ++i) {
1421 _buffer[i] = .089125f * grandf();
1425 for (pframes_t i = 0 ; i < n_samples; ++i) {
1426 // Paul Kellet's refined method
1427 // http://www.musicdsp.org/files/pink.txt
1428 // NB. If 'white' consists of uniform random numbers,
1429 // the pink noise will have an almost gaussian distribution.
1430 const float white = .0498f * randf ();
1431 _b0 = .99886f * _b0 + white * .0555179f;
1432 _b1 = .99332f * _b1 + white * .0750759f;
1433 _b2 = .96900f * _b2 + white * .1538520f;
1434 _b3 = .86650f * _b3 + white * .3104856f;
1435 _b4 = .55000f * _b4 + white * .5329522f;
1436 _b5 = -.7616f * _b5 - white * .0168980f;
1437 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362;
1438 _b6 = white * 0.115926;
1442 for (pframes_t i = 0 ; i < n_samples; ++i) {
1443 const float white = 0.0498f * randf ();
1444 // Paul Kellet's economy method
1445 // http://www.musicdsp.org/files/pink.txt
1446 _b0 = 0.99765 * _b0 + white * 0.0990460;
1447 _b1 = 0.96300 * _b1 + white * 0.2965164;
1448 _b2 = 0.57000 * _b2 + white * 1.0526913;
1449 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848;
1456 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1459 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1460 if (it == get_connections ().end ()) {
1461 memset (_buffer, 0, n_samples * sizeof (Sample));
1463 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1464 assert (source && source->is_output ());
1465 if (source->is_physical() && source->is_terminal()) {
1466 source->get_buffer(n_samples); // generate signal.
1468 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1469 while (++it != get_connections ().end ()) {
1470 source = static_cast<DummyAudioPort*>(*it);
1471 assert (source && source->is_output ());
1472 Sample* dst = buffer ();
1473 if (source->is_physical() && source->is_terminal()) {
1474 source->get_buffer(n_samples); // generate signal.
1476 const Sample* src = source->const_buffer ();
1477 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1482 } else if (is_output () && is_physical () && is_terminal()) {
1484 generate(n_samples);
1491 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1492 : DummyPort (b, name, flags)
1497 DummyMidiPort::~DummyMidiPort () { }
1499 struct MidiEventSorter {
1500 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1505 void* DummyMidiPort::get_buffer (pframes_t /* nframes */)
1509 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1510 i != get_connections ().end ();
1512 const DummyMidiBuffer src = static_cast<const DummyMidiPort*>(*i)->const_buffer ();
1513 for (DummyMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
1514 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1517 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1518 } else if (is_output () && is_physical () && is_terminal()) {
1524 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1526 , _timestamp (timestamp)
1530 _data = (uint8_t*) malloc (size);
1531 memcpy (_data, data, size);
1535 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
1536 : _size (other.size ())
1537 , _timestamp (other.timestamp ())
1540 if (other.size () && other.const_data ()) {
1541 _data = (uint8_t*) malloc (other.size ());
1542 memcpy (_data, other.const_data (), other.size ());
1546 DummyMidiEvent::~DummyMidiEvent () {