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 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
321 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
323 _system_inputs.clear();
327 if (register_system_ports()) {
328 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
332 engine.sample_rate_change (_samplerate);
333 engine.buffer_size_change (_samples_per_period);
335 if (engine.reestablish_ports ()) {
336 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
341 engine.reconnect_ports ();
342 _port_change_flag = false;
344 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
345 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
349 while (!_running && --timeout > 0) { Glib::usleep (1000); }
351 if (timeout == 0 || !_running) {
352 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
360 DummyAudioBackend::stop ()
368 if (pthread_join (_main_thread, &status)) {
369 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
377 DummyAudioBackend::freewheel (bool onoff)
379 if (onoff == _freewheeling) {
382 _freewheeling = onoff;
383 engine.freewheel_callback (onoff);
388 DummyAudioBackend::dsp_load () const
390 return 100.f * _dsp_load;
394 DummyAudioBackend::raw_buffer_size (DataType t)
397 case DataType::AUDIO:
398 return _samples_per_period * sizeof(Sample);
400 return _max_buffer_size; // XXX not really limited
407 DummyAudioBackend::sample_time ()
409 return _processed_samples;
413 DummyAudioBackend::sample_time_at_cycle_start ()
415 return _processed_samples;
419 DummyAudioBackend::samples_since_cycle_start ()
426 DummyAudioBackend::dummy_process_thread (void *arg)
428 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
429 boost::function<void ()> f = td->f;
436 DummyAudioBackend::create_process_thread (boost::function<void()> func)
440 size_t stacksize = 100000;
442 pthread_attr_init (&attr);
443 pthread_attr_setstacksize (&attr, stacksize);
444 ThreadData* td = new ThreadData (this, func, stacksize);
446 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
447 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
448 pthread_attr_destroy (&attr);
451 pthread_attr_destroy (&attr);
453 _threads.push_back (thread_id);
458 DummyAudioBackend::join_process_threads ()
462 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
465 if (pthread_join (*i, &status)) {
466 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
475 DummyAudioBackend::in_process_thread ()
477 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
479 if (pthread_equal (*i, pthread_self ()) != 0) {
487 DummyAudioBackend::process_thread_count ()
489 return _threads.size ();
493 DummyAudioBackend::update_latencies ()
495 // trigger latency callback in RT thread (locked graph)
496 port_connect_add_remove_callback();
502 DummyAudioBackend::private_handle () const
508 DummyAudioBackend::my_name () const
510 return _instance_name;
514 DummyAudioBackend::available () const
520 DummyAudioBackend::port_name_size () const
526 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
528 if (!valid_port (port)) {
529 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
532 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
536 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
538 if (!valid_port (port)) {
539 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
540 return std::string ();
542 return static_cast<DummyPort*>(port)->name ();
545 PortEngine::PortHandle
546 DummyAudioBackend::get_port_by_name (const std::string& name) const
548 PortHandle port = (PortHandle) find_port (name);
553 DummyAudioBackend::get_ports (
554 const std::string& port_name_pattern,
555 DataType type, PortFlags flags,
556 std::vector<std::string>& port_names) const
560 bool use_regexp = false;
561 if (port_name_pattern.size () > 0) {
562 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
566 for (size_t i = 0; i < _ports.size (); ++i) {
567 DummyPort* port = _ports[i];
568 if ((port->type () == type) && (port->flags () & flags)) {
569 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
570 port_names.push_back (port->name ());
576 regfree (&port_regex);
582 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
584 if (!valid_port (port)) {
585 return DataType::NIL;
587 return static_cast<DummyPort*>(port)->type ();
590 PortEngine::PortHandle
591 DummyAudioBackend::register_port (
592 const std::string& name,
593 ARDOUR::DataType type,
594 ARDOUR::PortFlags flags)
596 if (name.size () == 0) { return 0; }
597 if (flags & IsPhysical) { return 0; }
598 return add_port (_instance_name + ":" + name, type, flags);
601 PortEngine::PortHandle
602 DummyAudioBackend::add_port (
603 const std::string& name,
604 ARDOUR::DataType type,
605 ARDOUR::PortFlags flags)
607 assert(name.size ());
608 if (find_port (name)) {
609 PBD::error << _("DummyBackend::register_port: Port already exists:")
610 << " (" << name << ")" << endmsg;
613 DummyPort* port = NULL;
615 case DataType::AUDIO:
616 port = new DummyAudioPort (*this, name, flags);
619 port = new DummyMidiPort (*this, name, flags);
622 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
626 _ports.push_back (port);
632 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
634 if (!valid_port (port_handle)) {
635 PBD::error << _("DummyBackend::unregister_port: Invalid Port.") << endmsg;
637 DummyPort* port = static_cast<DummyPort*>(port_handle);
638 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
639 if (i == _ports.end ()) {
640 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
643 disconnect_all(port_handle);
649 DummyAudioBackend::register_system_ports()
652 enum DummyAudioPort::GeneratorType gt;
653 if (_device == _("Uniform White Noise")) {
654 gt = DummyAudioPort::UniformWhiteNoise;
655 } else if (_device == _("Gaussian White Noise")) {
656 gt = DummyAudioPort::GaussianWhiteNoise;
657 } else if (_device == _("Pink Noise")) {
658 gt = DummyAudioPort::PinkNoise;
659 } else if (_device == _("Pink Noise (low CPU)")) {
660 gt = DummyAudioPort::PonyNoise;
661 } else if (_device == _("Sine Wave")) {
662 gt = DummyAudioPort::SineWave;
664 gt = DummyAudioPort::Silence;
667 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
668 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
669 const int m_ins = _n_midi_inputs > 0 ? _n_midi_inputs : 2;
670 const int m_out = _n_midi_outputs > 0 ? _n_midi_outputs : 2;
673 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
674 for (int i = 1; i <= a_ins; ++i) {
676 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
677 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
679 set_latency_range (p, false, lr);
680 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
681 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
684 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
685 for (int i = 1; i <= a_out; ++i) {
687 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
688 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
690 set_latency_range (p, true, lr);
694 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
695 for (int i = 1; i <= m_ins; ++i) {
697 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
698 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
700 set_latency_range (p, false, lr);
703 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
704 for (int i = 1; i <= m_out; ++i) {
706 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
707 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
709 set_latency_range (p, true, lr);
715 DummyAudioBackend::unregister_ports (bool system_only)
718 _system_inputs.clear();
719 while (i < _ports.size ()) {
720 DummyPort* port = _ports[i];
721 if (! system_only || (port->is_physical () && port->is_terminal ())) {
722 port->disconnect_all ();
724 _ports.erase (_ports.begin() + i);
732 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
734 DummyPort* src_port = find_port (src);
735 DummyPort* dst_port = find_port (dst);
738 PBD::error << _("DummyBackend::connect: Invalid Source port:")
739 << " (" << src <<")" << endmsg;
743 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
744 << " (" << dst <<")" << endmsg;
747 return src_port->connect (dst_port);
751 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
753 DummyPort* src_port = find_port (src);
754 DummyPort* dst_port = find_port (dst);
756 if (!src_port || !dst_port) {
757 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
760 return src_port->disconnect (dst_port);
764 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
766 DummyPort* dst_port = find_port (dst);
767 if (!valid_port (src)) {
768 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
772 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
773 << " (" << dst << ")" << endmsg;
776 return static_cast<DummyPort*>(src)->connect (dst_port);
780 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
782 DummyPort* dst_port = find_port (dst);
783 if (!valid_port (src) || !dst_port) {
784 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
787 return static_cast<DummyPort*>(src)->disconnect (dst_port);
791 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
793 if (!valid_port (port)) {
794 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
797 static_cast<DummyPort*>(port)->disconnect_all ();
802 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
804 if (!valid_port (port)) {
805 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
808 return static_cast<DummyPort*>(port)->is_connected ();
812 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
814 DummyPort* dst_port = find_port (dst);
815 if (!valid_port (src) || !dst_port) {
816 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
819 return static_cast<DummyPort*>(src)->is_connected (dst_port);
823 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
825 if (!valid_port (port)) {
826 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
829 return static_cast<DummyPort*>(port)->is_physically_connected ();
833 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
835 if (!valid_port (port)) {
836 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
840 assert (0 == names.size ());
842 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
844 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
845 names.push_back ((*i)->name ());
848 return (int)names.size ();
853 DummyAudioBackend::midi_event_get (
854 pframes_t& timestamp,
855 size_t& size, uint8_t** buf, void* port_buffer,
856 uint32_t event_index)
858 assert (buf && port_buffer);
859 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
860 if (event_index >= source.size ()) {
863 DummyMidiEvent * const event = source[event_index].get ();
865 timestamp = event->timestamp ();
866 size = event->size ();
867 *buf = event->data ();
872 DummyAudioBackend::midi_event_put (
875 const uint8_t* buffer, size_t size)
877 assert (buffer && port_buffer);
878 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
879 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
880 fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
883 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
888 DummyAudioBackend::get_midi_event_count (void* port_buffer)
890 assert (port_buffer);
891 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
895 DummyAudioBackend::midi_clear (void* port_buffer)
897 assert (port_buffer);
898 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
906 DummyAudioBackend::can_monitor_input () const
912 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
918 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
924 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
929 /* Latency management */
932 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
934 if (!valid_port (port)) {
935 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
937 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
941 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
943 if (!valid_port (port)) {
944 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
950 return static_cast<DummyPort*>(port)->latency_range (for_playback);
953 /* Discovering physical ports */
956 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
958 if (!valid_port (port)) {
959 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
962 return static_cast<DummyPort*>(port)->is_physical ();
966 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
968 for (size_t i = 0; i < _ports.size (); ++i) {
969 DummyPort* port = _ports[i];
970 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
971 port_names.push_back (port->name ());
977 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
979 for (size_t i = 0; i < _ports.size (); ++i) {
980 DummyPort* port = _ports[i];
981 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
982 port_names.push_back (port->name ());
988 DummyAudioBackend::n_physical_outputs () const
992 for (size_t i = 0; i < _ports.size (); ++i) {
993 DummyPort* port = _ports[i];
994 if (port->is_output () && port->is_physical ()) {
995 switch (port->type ()) {
996 case DataType::AUDIO: ++n_audio; break;
997 case DataType::MIDI: ++n_midi; break;
1003 cc.set (DataType::AUDIO, n_audio);
1004 cc.set (DataType::MIDI, n_midi);
1009 DummyAudioBackend::n_physical_inputs () const
1013 for (size_t i = 0; i < _ports.size (); ++i) {
1014 DummyPort* port = _ports[i];
1015 if (port->is_input () && port->is_physical ()) {
1016 switch (port->type ()) {
1017 case DataType::AUDIO: ++n_audio; break;
1018 case DataType::MIDI: ++n_midi; break;
1024 cc.set (DataType::AUDIO, n_audio);
1025 cc.set (DataType::MIDI, n_midi);
1029 /* Getting access to the data buffer for a port */
1032 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1035 assert (valid_port (port));
1036 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1039 /* Engine Process */
1041 DummyAudioBackend::main_process_thread ()
1043 AudioEngine::thread_init_callback (this);
1045 _processed_samples = 0;
1047 manager.registration_callback();
1048 manager.graph_order_callback();
1050 uint64_t clock1, clock2;
1051 clock1 = g_get_monotonic_time();
1054 // re-set input buffers, generate on demand.
1055 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1056 (*it)->next_period();
1059 if (engine.process_callback (_samples_per_period)) {
1062 _processed_samples += _samples_per_period;
1063 if (!_freewheeling) {
1064 clock2 = g_get_monotonic_time();
1065 const int64_t elapsed_time = clock2 - clock1;
1066 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1067 _dsp_load = elapsed_time / (float) nomial_time;
1068 if (elapsed_time < nomial_time) {
1069 Glib::usleep (nomial_time - elapsed_time);
1071 Glib::usleep (100); // don't hog cpu
1075 Glib::usleep (100); // don't hog cpu
1077 clock1 = g_get_monotonic_time();
1079 bool connections_changed = false;
1080 bool ports_changed = false;
1081 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1082 if (_port_change_flag) {
1083 ports_changed = true;
1084 _port_change_flag = false;
1086 if (!_port_connection_queue.empty ()) {
1087 connections_changed = true;
1089 while (!_port_connection_queue.empty ()) {
1090 PortConnectData *c = _port_connection_queue.back ();
1091 manager.connect_callback (c->a, c->b, c->c);
1092 _port_connection_queue.pop_back ();
1095 pthread_mutex_unlock (&_port_callback_mutex);
1097 if (ports_changed) {
1098 manager.registration_callback();
1100 if (connections_changed) {
1101 manager.graph_order_callback();
1103 if (connections_changed || ports_changed) {
1104 engine.latency_callback(false);
1105 engine.latency_callback(true);
1114 /******************************************************************************/
1116 static boost::shared_ptr<DummyAudioBackend> _instance;
1118 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1119 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1120 static int deinstantiate ();
1121 static bool already_configured ();
1123 static ARDOUR::AudioBackendInfo _descriptor = {
1131 static boost::shared_ptr<AudioBackend>
1132 backend_factory (AudioEngine& e)
1135 _instance.reset (new DummyAudioBackend (e, _descriptor));
1141 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1143 s_instance_name = arg1;
1155 already_configured ()
1160 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1162 return &_descriptor;
1166 /******************************************************************************/
1167 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1168 : _dummy_backend (b)
1172 _capture_latency_range.min = 0;
1173 _capture_latency_range.max = 0;
1174 _playback_latency_range.min = 0;
1175 _playback_latency_range.max = 0;
1176 _dummy_backend.port_connect_add_remove_callback();
1179 DummyPort::~DummyPort () {
1181 _dummy_backend.port_connect_add_remove_callback();
1185 int DummyPort::connect (DummyPort *port)
1188 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1192 if (type () != port->type ()) {
1193 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1197 if (is_output () && port->is_output ()) {
1198 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1202 if (is_input () && port->is_input ()) {
1203 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1208 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1212 if (is_connected (port)) {
1213 #if 0 // don't bother to warn about this for now. just ignore it
1214 PBD::error << _("DummyPort::connect (): ports are already connected:")
1215 << " (" << name () << ") -> (" << port->name () << ")"
1221 _connect (port, true);
1226 void DummyPort::_connect (DummyPort *port, bool callback)
1228 _connections.push_back (port);
1230 port->_connect (this, false);
1231 _dummy_backend.port_connect_callback (name(), port->name(), true);
1235 int DummyPort::disconnect (DummyPort *port)
1238 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1242 if (!is_connected (port)) {
1243 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1244 << " (" << name () << ") -> (" << port->name () << ")"
1248 _disconnect (port, true);
1252 void DummyPort::_disconnect (DummyPort *port, bool callback)
1254 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1256 assert (it != _connections.end ());
1258 _connections.erase (it);
1261 port->_disconnect (this, false);
1262 _dummy_backend.port_connect_callback (name(), port->name(), false);
1267 void DummyPort::disconnect_all ()
1269 while (!_connections.empty ()) {
1270 _connections.back ()->_disconnect (this, false);
1271 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1272 _connections.pop_back ();
1277 DummyPort::is_connected (const DummyPort *port) const
1279 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1282 bool DummyPort::is_physically_connected () const
1284 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1285 if ((*it)->is_physical ()) {
1292 /******************************************************************************/
1294 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1295 : DummyPort (b, name, flags)
1296 , _gen_type (Silence)
1297 , _gen_cycle (false)
1311 memset (_buffer, 0, sizeof (_buffer));
1314 DummyAudioPort::~DummyAudioPort () {
1319 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1322 _rseed = g_get_monotonic_time() % UINT_MAX;
1324 switch (_gen_type) {
1327 case UniformWhiteNoise:
1328 case GaussianWhiteNoise:
1333 _tbl_length = 5 + randi() % (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);
1344 DummyAudioPort::randi ()
1346 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1347 // http://www.firstpr.com.au/dsp/rand31/
1349 lo = 16807 * (_rseed & 0xffff);
1350 hi = 16807 * (_rseed >> 16);
1352 lo += (hi & 0x7fff) << 16;
1355 lo = (lo & 0x7fffffff) + (lo >> 31);
1357 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1359 return (_rseed = lo);
1363 DummyAudioPort::randf ()
1365 return (randi() / 1073741824.f) - 1.f;
1368 float DummyAudioPort::grandf ()
1370 // Gaussian White Noise
1371 // http://www.musicdsp.org/archive.php?classid=0#109
1382 r = x1 * x1 + x2 * x2;
1383 } while ((r >= 1.0f) || (r < 1e-22f));
1385 r = sqrtf (-2.f * logf (r) / r);
1392 void DummyAudioPort::generate (const pframes_t n_samples)
1394 Glib::Threads::Mutex::Lock lm (generator_lock);
1399 switch (_gen_type) {
1401 memset (_buffer, 0, n_samples * sizeof (Sample));
1404 assert(_wavetable && _tbl_length > 0);
1406 pframes_t written = 0;
1407 while (written < n_samples) {
1408 const uint32_t remain = n_samples - written;
1409 const uint32_t to_copy = std::min(remain, _tbl_length - _tbl_offset);
1410 memcpy((void*)&_buffer[written],
1411 (void*)&_wavetable[_tbl_offset],
1412 to_copy * sizeof(Sample));
1414 _tbl_offset = (_tbl_offset + to_copy) % _tbl_length;
1418 case UniformWhiteNoise:
1419 for (pframes_t i = 0 ; i < n_samples; ++i) {
1420 _buffer[i] = .158489f * randf();
1423 case GaussianWhiteNoise:
1424 for (pframes_t i = 0 ; i < n_samples; ++i) {
1425 _buffer[i] = .089125f * grandf();
1429 for (pframes_t i = 0 ; i < n_samples; ++i) {
1430 // Paul Kellet's refined method
1431 // http://www.musicdsp.org/files/pink.txt
1432 // NB. If 'white' consists of uniform random numbers,
1433 // the pink noise will have an almost gaussian distribution.
1434 const float white = .0498f * randf ();
1435 _b0 = .99886f * _b0 + white * .0555179f;
1436 _b1 = .99332f * _b1 + white * .0750759f;
1437 _b2 = .96900f * _b2 + white * .1538520f;
1438 _b3 = .86650f * _b3 + white * .3104856f;
1439 _b4 = .55000f * _b4 + white * .5329522f;
1440 _b5 = -.7616f * _b5 - white * .0168980f;
1441 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362;
1442 _b6 = white * 0.115926;
1446 for (pframes_t i = 0 ; i < n_samples; ++i) {
1447 const float white = 0.0498f * randf ();
1448 // Paul Kellet's economy method
1449 // http://www.musicdsp.org/files/pink.txt
1450 _b0 = 0.99765 * _b0 + white * 0.0990460;
1451 _b1 = 0.96300 * _b1 + white * 0.2965164;
1452 _b2 = 0.57000 * _b2 + white * 1.0526913;
1453 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848;
1460 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1463 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1464 if (it == get_connections ().end ()) {
1465 memset (_buffer, 0, n_samples * sizeof (Sample));
1467 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1468 assert (source && source->is_output ());
1469 if (source->is_physical() && source->is_terminal()) {
1470 source->get_buffer(n_samples); // generate signal.
1472 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1473 while (++it != get_connections ().end ()) {
1474 source = static_cast<DummyAudioPort*>(*it);
1475 assert (source && source->is_output ());
1476 Sample* dst = buffer ();
1477 if (source->is_physical() && source->is_terminal()) {
1478 source->get_buffer(n_samples); // generate signal.
1480 const Sample* src = source->const_buffer ();
1481 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1486 } else if (is_output () && is_physical () && is_terminal()) {
1488 generate(n_samples);
1495 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1496 : DummyPort (b, name, flags)
1501 DummyMidiPort::~DummyMidiPort () { }
1503 struct MidiEventSorter {
1504 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1509 void* DummyMidiPort::get_buffer (pframes_t /* nframes */)
1513 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1514 i != get_connections ().end ();
1516 const DummyMidiBuffer src = static_cast<const DummyMidiPort*>(*i)->const_buffer ();
1517 for (DummyMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
1518 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1521 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1522 } else if (is_output () && is_physical () && is_terminal()) {
1528 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1530 , _timestamp (timestamp)
1534 _data = (uint8_t*) malloc (size);
1535 memcpy (_data, data, size);
1539 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
1540 : _size (other.size ())
1541 , _timestamp (other.timestamp ())
1544 if (other.size () && other.const_data ()) {
1545 _data = (uint8_t*) malloc (other.size ());
1546 memcpy (_data, other.const_data (), other.size ());
1550 DummyMidiEvent::~DummyMidiEvent () {