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 _device = _("Silence");
58 pthread_mutex_init (&_port_callback_mutex, 0);
61 DummyAudioBackend::~DummyAudioBackend ()
63 pthread_mutex_destroy (&_port_callback_mutex);
66 /* AUDIOBACKEND API */
69 DummyAudioBackend::name () const
75 DummyAudioBackend::is_realtime () const
80 std::vector<AudioBackend::DeviceStatus>
81 DummyAudioBackend::enumerate_devices () const
83 if (_device_status.empty()) {
84 _device_status.push_back (DeviceStatus (_("Silence"), true));
85 _device_status.push_back (DeviceStatus (_("Sine Wave"), true));
86 _device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
87 _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
88 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
89 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
91 return _device_status;
95 DummyAudioBackend::available_sample_rates (const std::string&) const
97 std::vector<float> sr;
98 sr.push_back (8000.0);
99 sr.push_back (22050.0);
100 sr.push_back (24000.0);
101 sr.push_back (44100.0);
102 sr.push_back (48000.0);
103 sr.push_back (88200.0);
104 sr.push_back (96000.0);
105 sr.push_back (176400.0);
106 sr.push_back (192000.0);
110 std::vector<uint32_t>
111 DummyAudioBackend::available_buffer_sizes (const std::string&) const
113 std::vector<uint32_t> bs;
130 DummyAudioBackend::available_input_channel_count (const std::string&) const
136 DummyAudioBackend::available_output_channel_count (const std::string&) const
142 DummyAudioBackend::can_change_sample_rate_when_running () const
148 DummyAudioBackend::can_change_buffer_size_when_running () const
154 DummyAudioBackend::set_device_name (const std::string& d)
161 DummyAudioBackend::set_sample_rate (float sr)
163 if (sr <= 0) { return -1; }
165 engine.sample_rate_change (sr);
170 DummyAudioBackend::set_buffer_size (uint32_t bs)
172 if (bs <= 0 || bs >= _max_buffer_size) {
175 _samples_per_period = bs;
176 engine.buffer_size_change (bs);
181 DummyAudioBackend::set_interleaved (bool yn)
183 if (!yn) { return 0; }
188 DummyAudioBackend::set_input_channels (uint32_t cc)
195 DummyAudioBackend::set_output_channels (uint32_t cc)
202 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
204 _systemic_input_latency = sl;
209 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
211 _systemic_output_latency = sl;
215 /* Retrieving parameters */
217 DummyAudioBackend::device_name () const
223 DummyAudioBackend::sample_rate () const
229 DummyAudioBackend::buffer_size () const
231 return _samples_per_period;
235 DummyAudioBackend::interleaved () const
241 DummyAudioBackend::input_channels () const
247 DummyAudioBackend::output_channels () const
253 DummyAudioBackend::systemic_input_latency () const
255 return _systemic_input_latency;
259 DummyAudioBackend::systemic_output_latency () const
261 return _systemic_output_latency;
266 std::vector<std::string>
267 DummyAudioBackend::enumerate_midi_options () const
269 if (_midi_options.empty()) {
270 _midi_options.push_back (_("1 in, 1 out"));
271 _midi_options.push_back (_("2 in, 2 out"));
272 _midi_options.push_back (_("8 in, 8 out"));
274 return _midi_options;
278 DummyAudioBackend::set_midi_option (const std::string& opt)
280 if (opt == _("1 in, 1 out")) {
281 _n_midi_inputs = _n_midi_outputs = 1;
283 else if (opt == _("2 in, 2 out")) {
284 _n_midi_inputs = _n_midi_outputs = 2;
286 else if (opt == _("8 in, 8 out")) {
287 _n_midi_inputs = _n_midi_outputs = 8;
290 _n_midi_inputs = _n_midi_outputs = 0;
296 DummyAudioBackend::midi_option () const
303 static void * pthread_process (void *arg)
305 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
306 d->main_process_thread ();
312 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
315 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
320 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
321 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
322 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
324 _system_inputs.clear();
328 if (register_system_ports()) {
329 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
333 engine.sample_rate_change (_samplerate);
334 engine.buffer_size_change (_samples_per_period);
336 if (engine.reestablish_ports ()) {
337 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
342 engine.reconnect_ports ();
343 _port_change_flag = false;
345 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
346 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
350 while (!_running && --timeout > 0) { Glib::usleep (1000); }
352 if (timeout == 0 || !_running) {
353 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
361 DummyAudioBackend::stop ()
369 if (pthread_join (_main_thread, &status)) {
370 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
378 DummyAudioBackend::freewheel (bool onoff)
380 if (onoff == _freewheeling) {
383 _freewheeling = onoff;
384 engine.freewheel_callback (onoff);
389 DummyAudioBackend::dsp_load () const
391 return 100.f * _dsp_load;
395 DummyAudioBackend::raw_buffer_size (DataType t)
398 case DataType::AUDIO:
399 return _samples_per_period * sizeof(Sample);
401 return _max_buffer_size; // XXX not really limited
408 DummyAudioBackend::sample_time ()
410 return _processed_samples;
414 DummyAudioBackend::sample_time_at_cycle_start ()
416 return _processed_samples;
420 DummyAudioBackend::samples_since_cycle_start ()
427 DummyAudioBackend::dummy_process_thread (void *arg)
429 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
430 boost::function<void ()> f = td->f;
437 DummyAudioBackend::create_process_thread (boost::function<void()> func)
441 size_t stacksize = 100000;
443 pthread_attr_init (&attr);
444 pthread_attr_setstacksize (&attr, stacksize);
445 ThreadData* td = new ThreadData (this, func, stacksize);
447 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
448 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
449 pthread_attr_destroy (&attr);
452 pthread_attr_destroy (&attr);
454 _threads.push_back (thread_id);
459 DummyAudioBackend::join_process_threads ()
463 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
466 if (pthread_join (*i, &status)) {
467 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
476 DummyAudioBackend::in_process_thread ()
478 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
480 if (pthread_equal (*i, pthread_self ()) != 0) {
488 DummyAudioBackend::process_thread_count ()
490 return _threads.size ();
494 DummyAudioBackend::update_latencies ()
496 // trigger latency callback in RT thread (locked graph)
497 port_connect_add_remove_callback();
503 DummyAudioBackend::private_handle () const
509 DummyAudioBackend::my_name () const
511 return _instance_name;
515 DummyAudioBackend::available () const
521 DummyAudioBackend::port_name_size () const
527 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
529 if (!valid_port (port)) {
530 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
533 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
537 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
539 if (!valid_port (port)) {
540 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
541 return std::string ();
543 return static_cast<DummyPort*>(port)->name ();
546 PortEngine::PortHandle
547 DummyAudioBackend::get_port_by_name (const std::string& name) const
549 PortHandle port = (PortHandle) find_port (name);
554 DummyAudioBackend::get_ports (
555 const std::string& port_name_pattern,
556 DataType type, PortFlags flags,
557 std::vector<std::string>& port_names) const
561 bool use_regexp = false;
562 if (port_name_pattern.size () > 0) {
563 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
567 for (size_t i = 0; i < _ports.size (); ++i) {
568 DummyPort* port = _ports[i];
569 if ((port->type () == type) && (port->flags () & flags)) {
570 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
571 port_names.push_back (port->name ());
577 regfree (&port_regex);
583 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
585 if (!valid_port (port)) {
586 return DataType::NIL;
588 return static_cast<DummyPort*>(port)->type ();
591 PortEngine::PortHandle
592 DummyAudioBackend::register_port (
593 const std::string& name,
594 ARDOUR::DataType type,
595 ARDOUR::PortFlags flags)
597 if (name.size () == 0) { return 0; }
598 if (flags & IsPhysical) { return 0; }
600 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
602 return add_port (_instance_name + ":" + name, type, flags);
605 PortEngine::PortHandle
606 DummyAudioBackend::add_port (
607 const std::string& name,
608 ARDOUR::DataType type,
609 ARDOUR::PortFlags flags)
611 assert(name.size ());
612 if (find_port (name)) {
613 PBD::error << _("DummyBackend::register_port: Port already exists:")
614 << " (" << name << ")" << endmsg;
617 DummyPort* port = NULL;
619 case DataType::AUDIO:
620 port = new DummyAudioPort (*this, name, flags);
623 port = new DummyMidiPort (*this, name, flags);
626 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
630 _ports.push_back (port);
636 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
639 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
640 assert (!valid_port (port_handle));
643 DummyPort* port = static_cast<DummyPort*>(port_handle);
644 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
645 if (i == _ports.end ()) {
646 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
649 disconnect_all(port_handle);
655 DummyAudioBackend::register_system_ports()
658 enum DummyAudioPort::GeneratorType gt;
659 if (_device == _("Uniform White Noise")) {
660 gt = DummyAudioPort::UniformWhiteNoise;
661 } else if (_device == _("Gaussian White Noise")) {
662 gt = DummyAudioPort::GaussianWhiteNoise;
663 } else if (_device == _("Pink Noise")) {
664 gt = DummyAudioPort::PinkNoise;
665 } else if (_device == _("Pink Noise (low CPU)")) {
666 gt = DummyAudioPort::PonyNoise;
667 } else if (_device == _("Sine Wave")) {
668 gt = DummyAudioPort::SineWave;
670 gt = DummyAudioPort::Silence;
673 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
674 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
675 const int m_ins = _n_midi_inputs > 0 ? _n_midi_inputs : 2;
676 const int m_out = _n_midi_outputs > 0 ? _n_midi_outputs : 2;
679 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
680 for (int i = 1; i <= a_ins; ++i) {
682 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
683 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
685 set_latency_range (p, false, lr);
686 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
687 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
690 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
691 for (int i = 1; i <= a_out; ++i) {
693 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
694 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
696 set_latency_range (p, true, lr);
700 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
701 for (int i = 1; i <= m_ins; ++i) {
703 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
704 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
706 set_latency_range (p, false, lr);
709 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
710 for (int i = 1; i <= m_out; ++i) {
712 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
713 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
715 set_latency_range (p, true, lr);
721 DummyAudioBackend::unregister_ports (bool system_only)
724 _system_inputs.clear();
725 while (i < _ports.size ()) {
726 DummyPort* port = _ports[i];
727 if (! system_only || (port->is_physical () && port->is_terminal ())) {
728 port->disconnect_all ();
730 _ports.erase (_ports.begin() + i);
738 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
740 DummyPort* src_port = find_port (src);
741 DummyPort* dst_port = find_port (dst);
744 PBD::error << _("DummyBackend::connect: Invalid Source port:")
745 << " (" << src <<")" << endmsg;
749 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
750 << " (" << dst <<")" << endmsg;
753 return src_port->connect (dst_port);
757 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
759 DummyPort* src_port = find_port (src);
760 DummyPort* dst_port = find_port (dst);
762 if (!src_port || !dst_port) {
763 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
766 return src_port->disconnect (dst_port);
770 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
772 DummyPort* dst_port = find_port (dst);
773 if (!valid_port (src)) {
774 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
778 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
779 << " (" << dst << ")" << endmsg;
782 return static_cast<DummyPort*>(src)->connect (dst_port);
786 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
788 DummyPort* dst_port = find_port (dst);
789 if (!valid_port (src) || !dst_port) {
790 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
793 return static_cast<DummyPort*>(src)->disconnect (dst_port);
797 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
799 if (!valid_port (port)) {
800 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
803 static_cast<DummyPort*>(port)->disconnect_all ();
808 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
810 if (!valid_port (port)) {
811 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
814 return static_cast<DummyPort*>(port)->is_connected ();
818 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
820 DummyPort* dst_port = find_port (dst);
821 if (!valid_port (src) || !dst_port) {
822 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
825 return static_cast<DummyPort*>(src)->is_connected (dst_port);
829 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
831 if (!valid_port (port)) {
832 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
835 return static_cast<DummyPort*>(port)->is_physically_connected ();
839 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
841 if (!valid_port (port)) {
842 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
846 assert (0 == names.size ());
848 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
850 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
851 names.push_back ((*i)->name ());
854 return (int)names.size ();
859 DummyAudioBackend::midi_event_get (
860 pframes_t& timestamp,
861 size_t& size, uint8_t** buf, void* port_buffer,
862 uint32_t event_index)
864 assert (buf && port_buffer);
865 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
866 if (event_index >= source.size ()) {
869 DummyMidiEvent * const event = source[event_index].get ();
871 timestamp = event->timestamp ();
872 size = event->size ();
873 *buf = event->data ();
878 DummyAudioBackend::midi_event_put (
881 const uint8_t* buffer, size_t size)
883 assert (buffer && port_buffer);
884 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
885 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
886 fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
889 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
894 DummyAudioBackend::get_midi_event_count (void* port_buffer)
896 assert (port_buffer);
897 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
901 DummyAudioBackend::midi_clear (void* port_buffer)
903 assert (port_buffer);
904 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
912 DummyAudioBackend::can_monitor_input () const
918 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
924 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
930 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
935 /* Latency management */
938 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
940 if (!valid_port (port)) {
941 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
943 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
947 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
949 if (!valid_port (port)) {
950 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
956 return static_cast<DummyPort*>(port)->latency_range (for_playback);
959 /* Discovering physical ports */
962 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
964 if (!valid_port (port)) {
965 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
968 return static_cast<DummyPort*>(port)->is_physical ();
972 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
974 for (size_t i = 0; i < _ports.size (); ++i) {
975 DummyPort* port = _ports[i];
976 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
977 port_names.push_back (port->name ());
983 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
985 for (size_t i = 0; i < _ports.size (); ++i) {
986 DummyPort* port = _ports[i];
987 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
988 port_names.push_back (port->name ());
994 DummyAudioBackend::n_physical_outputs () const
998 for (size_t i = 0; i < _ports.size (); ++i) {
999 DummyPort* port = _ports[i];
1000 if (port->is_output () && port->is_physical ()) {
1001 switch (port->type ()) {
1002 case DataType::AUDIO: ++n_audio; break;
1003 case DataType::MIDI: ++n_midi; break;
1009 cc.set (DataType::AUDIO, n_audio);
1010 cc.set (DataType::MIDI, n_midi);
1015 DummyAudioBackend::n_physical_inputs () const
1019 for (size_t i = 0; i < _ports.size (); ++i) {
1020 DummyPort* port = _ports[i];
1021 if (port->is_input () && port->is_physical ()) {
1022 switch (port->type ()) {
1023 case DataType::AUDIO: ++n_audio; break;
1024 case DataType::MIDI: ++n_midi; break;
1030 cc.set (DataType::AUDIO, n_audio);
1031 cc.set (DataType::MIDI, n_midi);
1035 /* Getting access to the data buffer for a port */
1038 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1041 assert (valid_port (port));
1042 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1045 /* Engine Process */
1047 DummyAudioBackend::main_process_thread ()
1049 AudioEngine::thread_init_callback (this);
1051 _processed_samples = 0;
1053 manager.registration_callback();
1054 manager.graph_order_callback();
1056 uint64_t clock1, clock2;
1057 clock1 = g_get_monotonic_time();
1060 // re-set input buffers, generate on demand.
1061 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1062 (*it)->next_period();
1065 if (engine.process_callback (_samples_per_period)) {
1068 _processed_samples += _samples_per_period;
1069 if (!_freewheeling) {
1070 clock2 = g_get_monotonic_time();
1071 const int64_t elapsed_time = clock2 - clock1;
1072 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1073 _dsp_load = elapsed_time / (float) nomial_time;
1074 if (elapsed_time < nomial_time) {
1075 Glib::usleep (nomial_time - elapsed_time);
1077 Glib::usleep (100); // don't hog cpu
1081 Glib::usleep (100); // don't hog cpu
1083 clock1 = g_get_monotonic_time();
1085 bool connections_changed = false;
1086 bool ports_changed = false;
1087 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1088 if (_port_change_flag) {
1089 ports_changed = true;
1090 _port_change_flag = false;
1092 if (!_port_connection_queue.empty ()) {
1093 connections_changed = true;
1095 while (!_port_connection_queue.empty ()) {
1096 PortConnectData *c = _port_connection_queue.back ();
1097 manager.connect_callback (c->a, c->b, c->c);
1098 _port_connection_queue.pop_back ();
1101 pthread_mutex_unlock (&_port_callback_mutex);
1103 if (ports_changed) {
1104 manager.registration_callback();
1106 if (connections_changed) {
1107 manager.graph_order_callback();
1109 if (connections_changed || ports_changed) {
1110 engine.latency_callback(false);
1111 engine.latency_callback(true);
1120 /******************************************************************************/
1122 static boost::shared_ptr<DummyAudioBackend> _instance;
1124 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1125 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1126 static int deinstantiate ();
1127 static bool already_configured ();
1129 static ARDOUR::AudioBackendInfo _descriptor = {
1137 static boost::shared_ptr<AudioBackend>
1138 backend_factory (AudioEngine& e)
1141 _instance.reset (new DummyAudioBackend (e, _descriptor));
1147 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1149 s_instance_name = arg1;
1161 already_configured ()
1166 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1168 return &_descriptor;
1172 /******************************************************************************/
1173 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1174 : _dummy_backend (b)
1178 _capture_latency_range.min = 0;
1179 _capture_latency_range.max = 0;
1180 _playback_latency_range.min = 0;
1181 _playback_latency_range.max = 0;
1182 _dummy_backend.port_connect_add_remove_callback();
1185 DummyPort::~DummyPort () {
1187 _dummy_backend.port_connect_add_remove_callback();
1191 int DummyPort::connect (DummyPort *port)
1194 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1198 if (type () != port->type ()) {
1199 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1203 if (is_output () && port->is_output ()) {
1204 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1208 if (is_input () && port->is_input ()) {
1209 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1214 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1218 if (is_connected (port)) {
1219 #if 0 // don't bother to warn about this for now. just ignore it
1220 PBD::error << _("DummyPort::connect (): ports are already connected:")
1221 << " (" << name () << ") -> (" << port->name () << ")"
1227 _connect (port, true);
1232 void DummyPort::_connect (DummyPort *port, bool callback)
1234 _connections.push_back (port);
1236 port->_connect (this, false);
1237 _dummy_backend.port_connect_callback (name(), port->name(), true);
1241 int DummyPort::disconnect (DummyPort *port)
1244 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1248 if (!is_connected (port)) {
1249 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1250 << " (" << name () << ") -> (" << port->name () << ")"
1254 _disconnect (port, true);
1258 void DummyPort::_disconnect (DummyPort *port, bool callback)
1260 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1262 assert (it != _connections.end ());
1264 _connections.erase (it);
1267 port->_disconnect (this, false);
1268 _dummy_backend.port_connect_callback (name(), port->name(), false);
1273 void DummyPort::disconnect_all ()
1275 while (!_connections.empty ()) {
1276 _connections.back ()->_disconnect (this, false);
1277 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1278 _connections.pop_back ();
1283 DummyPort::is_connected (const DummyPort *port) const
1285 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1288 bool DummyPort::is_physically_connected () const
1290 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1291 if ((*it)->is_physical ()) {
1298 /******************************************************************************/
1300 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1301 : DummyPort (b, name, flags)
1302 , _gen_type (Silence)
1303 , _gen_cycle (false)
1317 memset (_buffer, 0, sizeof (_buffer));
1320 DummyAudioPort::~DummyAudioPort () {
1325 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1328 _rseed = g_get_monotonic_time() % UINT_MAX;
1330 switch (_gen_type) {
1333 case UniformWhiteNoise:
1334 case GaussianWhiteNoise:
1339 _tbl_length = 5 + randi() % (int)(samplerate / 20.f);
1340 _wavetable = (Sample*) malloc( _tbl_length * sizeof(Sample));
1341 for (uint32_t i = 0 ; i < _tbl_length; ++i) {
1342 _wavetable[i] = .12589f * sinf(2.0 * M_PI * (float)i / (float)_tbl_length);
1350 DummyAudioPort::randi ()
1352 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1353 // http://www.firstpr.com.au/dsp/rand31/
1355 lo = 16807 * (_rseed & 0xffff);
1356 hi = 16807 * (_rseed >> 16);
1358 lo += (hi & 0x7fff) << 16;
1361 lo = (lo & 0x7fffffff) + (lo >> 31);
1363 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1365 return (_rseed = lo);
1369 DummyAudioPort::randf ()
1371 return (randi() / 1073741824.f) - 1.f;
1374 float DummyAudioPort::grandf ()
1376 // Gaussian White Noise
1377 // http://www.musicdsp.org/archive.php?classid=0#109
1388 r = x1 * x1 + x2 * x2;
1389 } while ((r >= 1.0f) || (r < 1e-22f));
1391 r = sqrtf (-2.f * logf (r) / r);
1398 void DummyAudioPort::generate (const pframes_t n_samples)
1400 Glib::Threads::Mutex::Lock lm (generator_lock);
1405 switch (_gen_type) {
1407 memset (_buffer, 0, n_samples * sizeof (Sample));
1410 assert(_wavetable && _tbl_length > 0);
1412 pframes_t written = 0;
1413 while (written < n_samples) {
1414 const uint32_t remain = n_samples - written;
1415 const uint32_t to_copy = std::min(remain, _tbl_length - _tbl_offset);
1416 memcpy((void*)&_buffer[written],
1417 (void*)&_wavetable[_tbl_offset],
1418 to_copy * sizeof(Sample));
1420 _tbl_offset = (_tbl_offset + to_copy) % _tbl_length;
1424 case UniformWhiteNoise:
1425 for (pframes_t i = 0 ; i < n_samples; ++i) {
1426 _buffer[i] = .158489f * randf();
1429 case GaussianWhiteNoise:
1430 for (pframes_t i = 0 ; i < n_samples; ++i) {
1431 _buffer[i] = .089125f * grandf();
1435 for (pframes_t i = 0 ; i < n_samples; ++i) {
1436 // Paul Kellet's refined method
1437 // http://www.musicdsp.org/files/pink.txt
1438 // NB. If 'white' consists of uniform random numbers,
1439 // the pink noise will have an almost gaussian distribution.
1440 const float white = .0498f * randf ();
1441 _b0 = .99886f * _b0 + white * .0555179f;
1442 _b1 = .99332f * _b1 + white * .0750759f;
1443 _b2 = .96900f * _b2 + white * .1538520f;
1444 _b3 = .86650f * _b3 + white * .3104856f;
1445 _b4 = .55000f * _b4 + white * .5329522f;
1446 _b5 = -.7616f * _b5 - white * .0168980f;
1447 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362;
1448 _b6 = white * 0.115926;
1452 for (pframes_t i = 0 ; i < n_samples; ++i) {
1453 const float white = 0.0498f * randf ();
1454 // Paul Kellet's economy method
1455 // http://www.musicdsp.org/files/pink.txt
1456 _b0 = 0.99765 * _b0 + white * 0.0990460;
1457 _b1 = 0.96300 * _b1 + white * 0.2965164;
1458 _b2 = 0.57000 * _b2 + white * 1.0526913;
1459 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848;
1466 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1469 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1470 if (it == get_connections ().end ()) {
1471 memset (_buffer, 0, n_samples * sizeof (Sample));
1473 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1474 assert (source && source->is_output ());
1475 if (source->is_physical() && source->is_terminal()) {
1476 source->get_buffer(n_samples); // generate signal.
1478 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1479 while (++it != get_connections ().end ()) {
1480 source = static_cast<DummyAudioPort*>(*it);
1481 assert (source && source->is_output ());
1482 Sample* dst = buffer ();
1483 if (source->is_physical() && source->is_terminal()) {
1484 source->get_buffer(n_samples); // generate signal.
1486 const Sample* src = source->const_buffer ();
1487 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1492 } else if (is_output () && is_physical () && is_terminal()) {
1494 generate(n_samples);
1501 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1502 : DummyPort (b, name, flags)
1507 DummyMidiPort::~DummyMidiPort () { }
1509 struct MidiEventSorter {
1510 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1515 void* DummyMidiPort::get_buffer (pframes_t /* nframes */)
1519 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1520 i != get_connections ().end ();
1522 const DummyMidiBuffer src = static_cast<const DummyMidiPort*>(*i)->const_buffer ();
1523 for (DummyMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
1524 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1527 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1528 } else if (is_output () && is_physical () && is_terminal()) {
1534 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1536 , _timestamp (timestamp)
1540 _data = (uint8_t*) malloc (size);
1541 memcpy (_data, data, size);
1545 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
1546 : _size (other.size ())
1547 , _timestamp (other.timestamp ())
1550 if (other.size () && other.const_data ()) {
1551 _data = (uint8_t*) malloc (other.size ());
1552 memcpy (_data, other.const_data (), other.size ());
1556 DummyMidiEvent::~DummyMidiEvent () {