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.
27 #ifdef PLATFORM_WINDOWS
29 #include <pbd/windows_timer_utils.h>
32 #include "dummy_audiobackend.h"
33 #include "dummy_midi_seq.h"
35 #include "pbd/error.h"
36 #include "ardour/port_manager.h"
39 using namespace ARDOUR;
41 static std::string s_instance_name;
42 size_t DummyAudioBackend::_max_buffer_size = 8192;
43 std::vector<std::string> DummyAudioBackend::_midi_options;
44 std::vector<AudioBackend::DeviceStatus> DummyAudioBackend::_device_status;
46 std::vector<DummyAudioBackend::DriverSpeed> DummyAudioBackend::_driver_speed;
48 static int64_t _x_get_monotonic_usec() {
49 #ifdef PLATFORM_WINDOWS
50 return PBD::get_microseconds();
52 return g_get_monotonic_time();
55 DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
56 : AudioBackend (e, info)
59 , _freewheeling (false)
63 , _samples_per_period (1024)
69 , _midi_mode (MidiNoEvents)
70 , _systemic_input_latency (0)
71 , _systemic_output_latency (0)
72 , _processed_samples (0)
73 , _port_change_flag (false)
75 _instance_name = s_instance_name;
76 _device = _("Silence");
77 pthread_mutex_init (&_port_callback_mutex, 0);
79 if (_driver_speed.empty()) {
80 _driver_speed.push_back (DriverSpeed (_("Half Speed"), 2.0f));
81 _driver_speed.push_back (DriverSpeed (_("Normal Speed"), 1.0f));
82 _driver_speed.push_back (DriverSpeed (_("Double Speed"), 0.5f));
83 _driver_speed.push_back (DriverSpeed (_("5x Speed"), 0.2f));
84 _driver_speed.push_back (DriverSpeed (_("10x Speed"), 0.1f));
85 _driver_speed.push_back (DriverSpeed (_("15x Speed"), 0.06666f));
86 _driver_speed.push_back (DriverSpeed (_("20x Speed"), 0.05f));
87 _driver_speed.push_back (DriverSpeed (_("50x Speed"), 0.02f));
92 DummyAudioBackend::~DummyAudioBackend ()
94 pthread_mutex_destroy (&_port_callback_mutex);
97 /* AUDIOBACKEND API */
100 DummyAudioBackend::name () const
102 return X_("Dummy"); // internal name
106 DummyAudioBackend::is_realtime () const
111 std::vector<AudioBackend::DeviceStatus>
112 DummyAudioBackend::enumerate_devices () const
114 if (_device_status.empty()) {
115 _device_status.push_back (DeviceStatus (_("Silence"), true));
116 _device_status.push_back (DeviceStatus (_("DC -6dBFS (+.5)"), true));
117 _device_status.push_back (DeviceStatus (_("Demolition"), true));
118 _device_status.push_back (DeviceStatus (_("Sine Wave"), true));
119 _device_status.push_back (DeviceStatus (_("Square Wave"), true));
120 _device_status.push_back (DeviceStatus (_("Impulses"), true));
121 _device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
122 _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
123 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
124 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
125 _device_status.push_back (DeviceStatus (_("Sine Sweep"), true));
126 _device_status.push_back (DeviceStatus (_("Sine Sweep Swell"), true));
127 _device_status.push_back (DeviceStatus (_("Square Sweep"), true));
128 _device_status.push_back (DeviceStatus (_("Square Sweep Swell"), true));
129 _device_status.push_back (DeviceStatus (_("Loopback"), true));
131 return _device_status;
135 DummyAudioBackend::available_sample_rates (const std::string&) const
137 std::vector<float> sr;
138 sr.push_back (8000.0);
139 sr.push_back (22050.0);
140 sr.push_back (24000.0);
141 sr.push_back (44100.0);
142 sr.push_back (48000.0);
143 sr.push_back (88200.0);
144 sr.push_back (96000.0);
145 sr.push_back (176400.0);
146 sr.push_back (192000.0);
150 std::vector<uint32_t>
151 DummyAudioBackend::available_buffer_sizes (const std::string&) const
153 std::vector<uint32_t> bs;
170 DummyAudioBackend::available_input_channel_count (const std::string&) const
176 DummyAudioBackend::available_output_channel_count (const std::string&) const
182 DummyAudioBackend::can_change_sample_rate_when_running () const
188 DummyAudioBackend::can_change_buffer_size_when_running () const
193 std::vector<std::string>
194 DummyAudioBackend::enumerate_drivers () const
196 std::vector<std::string> speed_drivers;
197 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
198 speed_drivers.push_back (it->name);
200 return speed_drivers;
204 DummyAudioBackend::driver_name () const
206 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
207 if (rintf (1e6f * _speedup) == rintf (1e6f * it->speedup)) {
212 return _("Normal Speed");
216 DummyAudioBackend::set_driver (const std::string& d)
218 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
220 _speedup = it->speedup;
229 DummyAudioBackend::set_device_name (const std::string& d)
236 DummyAudioBackend::set_sample_rate (float sr)
238 if (sr <= 0) { return -1; }
240 engine.sample_rate_change (sr);
245 DummyAudioBackend::set_buffer_size (uint32_t bs)
247 if (bs <= 0 || bs > _max_buffer_size) {
250 _samples_per_period = bs;
252 /* update port latencies
253 * with 'Loopback' there is exactly once cycle latency,
254 * divide it between In + Out;
257 lr.min = lr.max = _systemic_input_latency;
258 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
259 set_latency_range (*it, false, lr);
261 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
262 set_latency_range (*it, false, lr);
265 lr.min = lr.max = _systemic_output_latency;
266 for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
267 set_latency_range (*it, true, lr);
269 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
270 set_latency_range (*it, true, lr);
273 engine.buffer_size_change (bs);
278 DummyAudioBackend::set_interleaved (bool yn)
280 if (!yn) { return 0; }
285 DummyAudioBackend::set_input_channels (uint32_t cc)
292 DummyAudioBackend::set_output_channels (uint32_t cc)
299 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
301 _systemic_input_latency = sl;
306 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
308 _systemic_output_latency = sl;
312 /* Retrieving parameters */
314 DummyAudioBackend::device_name () const
320 DummyAudioBackend::sample_rate () const
326 DummyAudioBackend::buffer_size () const
328 return _samples_per_period;
332 DummyAudioBackend::interleaved () const
338 DummyAudioBackend::input_channels () const
344 DummyAudioBackend::output_channels () const
350 DummyAudioBackend::systemic_input_latency () const
352 return _systemic_input_latency;
356 DummyAudioBackend::systemic_output_latency () const
358 return _systemic_output_latency;
363 std::vector<std::string>
364 DummyAudioBackend::enumerate_midi_options () const
366 if (_midi_options.empty()) {
367 _midi_options.push_back (_("1 in, 1 out, Silence"));
368 _midi_options.push_back (_("2 in, 2 out, Silence"));
369 _midi_options.push_back (_("8 in, 8 out, Silence"));
370 _midi_options.push_back (_("Midi Event Generators"));
371 _midi_options.push_back (_("8 in, 8 out, Loopback"));
372 _midi_options.push_back (_("MIDI to Audio, Loopback"));
373 _midi_options.push_back (_("No MIDI I/O"));
375 return _midi_options;
379 DummyAudioBackend::set_midi_option (const std::string& opt)
381 _midi_mode = MidiNoEvents;
382 if (opt == _("1 in, 1 out, Silence")) {
383 _n_midi_inputs = _n_midi_outputs = 1;
385 else if (opt == _("2 in, 2 out, Silence")) {
386 _n_midi_inputs = _n_midi_outputs = 2;
388 else if (opt == _("8 in, 8 out, Silence")) {
389 _n_midi_inputs = _n_midi_outputs = 8;
391 else if (opt == _("Midi Event Generators")) {
392 _n_midi_inputs = _n_midi_outputs = NUM_MIDI_EVENT_GENERATORS;
393 _midi_mode = MidiGenerator;
395 else if (opt == _("8 in, 8 out, Loopback")) {
396 _n_midi_inputs = _n_midi_outputs = 8;
397 _midi_mode = MidiLoopback;
399 else if (opt == _("MIDI to Audio, Loopback")) {
400 _n_midi_inputs = _n_midi_outputs = UINT32_MAX;
401 _midi_mode = MidiToAudio;
404 _n_midi_inputs = _n_midi_outputs = 0;
410 DummyAudioBackend::midi_option () const
417 static void * pthread_process (void *arg)
419 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
420 d->main_process_thread ();
426 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
429 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
430 return BackendReinitializationError;
433 if (_ports.size () || _portmap.size ()) {
434 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
435 for (PortIndex::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
436 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
438 for (PortMap::const_iterator it = _portmap.begin (); it != _portmap.end (); ++it) {
439 PBD::info << _("DummyAudioBackend: portmap '") << (*it).first << "' exists." << endmsg;
441 _system_inputs.clear();
442 _system_outputs.clear();
443 _system_midi_in.clear();
444 _system_midi_out.clear();
449 if (register_system_ports()) {
450 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
451 return PortRegistrationError;
454 engine.sample_rate_change (_samplerate);
455 engine.buffer_size_change (_samples_per_period);
457 _dsp_load_calc.set_max_time (_samplerate, _samples_per_period);
459 if (engine.reestablish_ports ()) {
460 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
462 return PortReconnectError;
465 engine.reconnect_ports ();
466 _port_change_flag = false;
468 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
469 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
473 while (!_running && --timeout > 0) { Glib::usleep (1000); }
475 if (timeout == 0 || !_running) {
476 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
477 return ProcessThreadStartError;
484 DummyAudioBackend::stop ()
492 if (pthread_join (_main_thread, &status)) {
493 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
501 DummyAudioBackend::freewheel (bool onoff)
503 _freewheeling = onoff;
508 DummyAudioBackend::dsp_load () const
510 return 100.f * _dsp_load;
514 DummyAudioBackend::raw_buffer_size (DataType t)
517 case DataType::AUDIO:
518 return _samples_per_period * sizeof(Sample);
520 return _max_buffer_size; // XXX not really limited
527 DummyAudioBackend::sample_time ()
529 return _processed_samples;
533 DummyAudioBackend::sample_time_at_cycle_start ()
535 return _processed_samples;
539 DummyAudioBackend::samples_since_cycle_start ()
546 DummyAudioBackend::dummy_process_thread (void *arg)
548 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
549 boost::function<void ()> f = td->f;
556 DummyAudioBackend::create_process_thread (boost::function<void()> func)
560 size_t stacksize = 100000;
562 pthread_attr_init (&attr);
563 pthread_attr_setstacksize (&attr, stacksize);
564 ThreadData* td = new ThreadData (this, func, stacksize);
566 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
567 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
568 pthread_attr_destroy (&attr);
571 pthread_attr_destroy (&attr);
573 _threads.push_back (thread_id);
578 DummyAudioBackend::join_process_threads ()
582 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
585 if (pthread_join (*i, &status)) {
586 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
595 DummyAudioBackend::in_process_thread ()
597 if (pthread_equal (_main_thread, pthread_self()) != 0) {
601 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
603 if (pthread_equal (*i, pthread_self ()) != 0) {
611 DummyAudioBackend::process_thread_count ()
613 return _threads.size ();
617 DummyAudioBackend::update_latencies ()
619 // trigger latency callback in RT thread (locked graph)
620 port_connect_add_remove_callback();
626 DummyAudioBackend::private_handle () const
632 DummyAudioBackend::my_name () const
634 return _instance_name;
638 DummyAudioBackend::available () const
644 DummyAudioBackend::port_name_size () const
650 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
652 std::string newname (_instance_name + ":" + name);
654 if (!valid_port (port)) {
655 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
659 if (find_port (newname)) {
660 PBD::error << _("DummyBackend::set_port_name: Port with given name already exists") << endmsg;
664 DummyPort* p = static_cast<DummyPort*>(port);
665 _portmap.erase (p->name());
666 _portmap.insert (make_pair (newname, p));
667 return p->set_name (newname);
671 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
673 if (!valid_port (port)) {
674 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
675 return std::string ();
677 return static_cast<DummyPort*>(port)->name ();
681 DummyAudioBackend::get_port_property (PortHandle port, const std::string& key, std::string& value, std::string& type) const
683 if (!valid_port (port)) {
684 PBD::warning << _("DummyBackend::get_port_property: Invalid Port(s)") << endmsg;
687 if (key == "http://jackaudio.org/metadata/pretty-name") {
689 value = static_cast<DummyPort*>(port)->pretty_name ();
690 if (!value.empty()) {
698 DummyAudioBackend::set_port_property (PortHandle port, const std::string& key, const std::string& value, const std::string& type)
700 if (!valid_port (port)) {
701 PBD::warning << _("DummyBackend::set_port_property: Invalid Port(s)") << endmsg;
704 if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
705 static_cast<DummyPort*>(port)->set_pretty_name (value);
711 PortEngine::PortHandle
712 DummyAudioBackend::get_port_by_name (const std::string& name) const
714 PortHandle port = (PortHandle) find_port (name);
719 DummyAudioBackend::get_ports (
720 const std::string& port_name_pattern,
721 DataType type, PortFlags flags,
722 std::vector<std::string>& port_names) const
726 bool use_regexp = false;
727 if (port_name_pattern.size () > 0) {
728 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
733 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
734 DummyPort* port = *i;
735 if ((port->type () == type) && flags == (port->flags () & flags)) {
736 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
737 port_names.push_back (port->name ());
743 regfree (&port_regex);
749 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
751 if (!valid_port (port)) {
752 return DataType::NIL;
754 return static_cast<DummyPort*>(port)->type ();
757 PortEngine::PortHandle
758 DummyAudioBackend::register_port (
759 const std::string& name,
760 ARDOUR::DataType type,
761 ARDOUR::PortFlags flags)
763 if (name.size () == 0) { return 0; }
764 if (flags & IsPhysical) { return 0; }
766 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
768 return add_port (_instance_name + ":" + name, type, flags);
771 PortEngine::PortHandle
772 DummyAudioBackend::add_port (
773 const std::string& name,
774 ARDOUR::DataType type,
775 ARDOUR::PortFlags flags)
777 assert(name.size ());
778 if (find_port (name)) {
779 PBD::error << _("DummyBackend::register_port: Port already exists:")
780 << " (" << name << ")" << endmsg;
783 DummyPort* port = NULL;
785 case DataType::AUDIO:
786 port = new DummyAudioPort (*this, name, flags);
789 port = new DummyMidiPort (*this, name, flags);
792 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
796 _ports.insert (port);
797 _portmap.insert (make_pair (name, port));
803 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
806 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
807 assert (!valid_port (port_handle));
810 DummyPort* port = static_cast<DummyPort*>(port_handle);
811 PortIndex::iterator i = _ports.find (static_cast<DummyPort*>(port_handle));
812 if (i == _ports.end ()) {
813 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
816 disconnect_all(port_handle);
817 _portmap.erase (port->name());
823 DummyAudioBackend::register_system_ports()
826 enum DummyAudioPort::GeneratorType gt;
827 if (_device == _("Uniform White Noise")) {
828 gt = DummyAudioPort::UniformWhiteNoise;
829 } else if (_device == _("Gaussian White Noise")) {
830 gt = DummyAudioPort::GaussianWhiteNoise;
831 } else if (_device == _("Pink Noise")) {
832 gt = DummyAudioPort::PinkNoise;
833 } else if (_device == _("Pink Noise (low CPU)")) {
834 gt = DummyAudioPort::PonyNoise;
835 } else if (_device == _("Sine Wave")) {
836 gt = DummyAudioPort::SineWave;
837 } else if (_device == _("Square Wave")) {
838 gt = DummyAudioPort::SquareWave;
839 } else if (_device == _("Impulses")) {
840 gt = DummyAudioPort::KronekerDelta;
841 } else if (_device == _("Sine Sweep")) {
842 gt = DummyAudioPort::SineSweep;
843 } else if (_device == _("Sine Sweep Swell")) {
844 gt = DummyAudioPort::SineSweepSwell;
845 } else if (_device == _("Square Sweep")) {
846 gt = DummyAudioPort::SquareSweep;
847 } else if (_device == _("Square Sweep Swell")) {
848 gt = DummyAudioPort::SquareSweepSwell;
849 } else if (_device == _("Loopback")) {
850 gt = DummyAudioPort::Loopback;
851 } else if (_device == _("Demolition")) {
852 gt = DummyAudioPort::Demolition;
853 } else if (_device == _("DC -6dBFS (+.5)")) {
854 gt = DummyAudioPort::DC05;
856 gt = DummyAudioPort::Silence;
859 if (_midi_mode == MidiToAudio) {
860 gt = DummyAudioPort::Loopback;
863 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
864 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
865 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
866 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
870 lr.min = lr.max = _systemic_input_latency;
871 for (int i = 1; i <= a_ins; ++i) {
873 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
874 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
876 set_latency_range (p, false, lr);
877 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
878 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
881 lr.min = lr.max = _systemic_output_latency;
882 for (int i = 1; i <= a_out; ++i) {
884 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
885 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
887 set_latency_range (p, true, lr);
888 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
892 lr.min = lr.max = _systemic_input_latency;
893 for (int i = 0; i < m_ins; ++i) {
895 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
896 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
898 set_latency_range (p, false, lr);
899 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
900 if (_midi_mode == MidiGenerator) {
901 static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
902 static_cast<DummyMidiPort*>(p)->set_pretty_name (DummyMidiData::sequence_names[i % NUM_MIDI_EVENT_GENERATORS]);
906 lr.min = lr.max = _systemic_output_latency;
907 for (int i = 1; i <= m_out; ++i) {
909 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
910 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
912 set_latency_range (p, true, lr);
913 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
915 if (_device == _("Loopback") && _midi_mode == MidiToAudio) {
916 std::stringstream ss;
918 for (int apc = 0; apc < (int)_system_inputs.size(); ++apc) {
919 if ((apc % m_out) + 1 == i) {
920 ss << " >" << (apc + 1);
923 static_cast<DummyMidiPort*>(p)->set_pretty_name (ss.str());
930 DummyAudioBackend::unregister_ports (bool system_only)
932 _system_inputs.clear();
933 _system_outputs.clear();
934 _system_midi_in.clear();
935 _system_midi_out.clear();
937 for (PortIndex::iterator i = _ports.begin (); i != _ports.end ();) {
938 PortIndex::iterator cur = i++;
939 DummyPort* port = *cur;
940 if (! system_only || (port->is_physical () && port->is_terminal ())) {
941 port->disconnect_all ();
942 _portmap.erase (port->name());
950 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
952 DummyPort* src_port = find_port (src);
953 DummyPort* dst_port = find_port (dst);
956 PBD::error << _("DummyBackend::connect: Invalid Source port:")
957 << " (" << src <<")" << endmsg;
961 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
962 << " (" << dst <<")" << endmsg;
965 return src_port->connect (dst_port);
969 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
971 DummyPort* src_port = find_port (src);
972 DummyPort* dst_port = find_port (dst);
974 if (!src_port || !dst_port) {
975 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
978 return src_port->disconnect (dst_port);
982 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
984 DummyPort* dst_port = find_port (dst);
985 if (!valid_port (src)) {
986 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
990 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
991 << " (" << dst << ")" << endmsg;
994 return static_cast<DummyPort*>(src)->connect (dst_port);
998 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1000 DummyPort* dst_port = find_port (dst);
1001 if (!valid_port (src) || !dst_port) {
1002 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
1005 return static_cast<DummyPort*>(src)->disconnect (dst_port);
1009 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
1011 if (!valid_port (port)) {
1012 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1015 static_cast<DummyPort*>(port)->disconnect_all ();
1020 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1022 if (!valid_port (port)) {
1023 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1026 return static_cast<DummyPort*>(port)->is_connected ();
1030 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1032 DummyPort* dst_port = find_port (dst);
1034 if (!valid_port (src) || !dst_port) {
1035 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
1039 return static_cast<DummyPort*>(src)->is_connected (dst_port);
1043 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1045 if (!valid_port (port)) {
1046 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
1049 return static_cast<DummyPort*>(port)->is_physically_connected ();
1053 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1055 if (!valid_port (port)) {
1056 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
1060 assert (0 == names.size ());
1062 const std::set<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
1064 for (std::set<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1065 names.push_back ((*i)->name ());
1068 return (int)names.size ();
1073 DummyAudioBackend::midi_event_get (
1074 pframes_t& timestamp,
1075 size_t& size, uint8_t** buf, void* port_buffer,
1076 uint32_t event_index)
1078 assert (buf && port_buffer);
1079 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
1080 if (event_index >= source.size ()) {
1083 DummyMidiEvent * const event = source[event_index].get ();
1085 timestamp = event->timestamp ();
1086 size = event->size ();
1087 *buf = event->data ();
1092 DummyAudioBackend::midi_event_put (
1094 pframes_t timestamp,
1095 const uint8_t* buffer, size_t size)
1097 assert (buffer && port_buffer);
1098 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
1099 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1100 // nevermind, ::get_buffer() sorts events, but always print warning
1101 fprintf (stderr, "DummyMidiBuffer: it's too late for this event %d > %d.\n", (pframes_t)dst.back ()->timestamp (), timestamp);
1103 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
1104 #if 0 // DEBUG MIDI EVENTS
1105 printf("DummyAudioBackend::midi_event_put %d, %zu: ", timestamp, size);
1106 for (size_t xx = 0; xx < size; ++xx) {
1107 printf(" %02x", buffer[xx]);
1115 DummyAudioBackend::get_midi_event_count (void* port_buffer)
1117 assert (port_buffer);
1118 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1122 DummyAudioBackend::midi_clear (void* port_buffer)
1124 assert (port_buffer);
1125 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1133 DummyAudioBackend::can_monitor_input () const
1139 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1145 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1151 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1156 /* Latency management */
1159 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1161 if (!valid_port (port)) {
1162 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1164 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1168 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1171 if (!valid_port (port)) {
1172 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1177 DummyPort *p = static_cast<DummyPort*>(port);
1180 r = p->latency_range (for_playback);
1181 if (p->is_physical() && p->is_terminal()) {
1182 if (p->is_input() && for_playback) {
1183 const size_t l_in = _samples_per_period * .25;
1187 if (p->is_output() && !for_playback) {
1188 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1189 const size_t l_in = _samples_per_period * .25;
1190 const size_t l_out = _samples_per_period - l_in;
1198 /* Discovering physical ports */
1201 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1203 if (!valid_port (port)) {
1204 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1207 return static_cast<DummyPort*>(port)->is_physical ();
1211 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1213 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1214 DummyPort* port = *i;
1215 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1216 port_names.push_back (port->name ());
1222 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1224 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1225 DummyPort* port = *i;
1226 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1227 port_names.push_back (port->name ());
1233 DummyAudioBackend::n_physical_outputs () const
1237 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
1238 DummyPort* port = *i;
1239 if (port->is_output () && port->is_physical ()) {
1240 switch (port->type ()) {
1241 case DataType::AUDIO: ++n_audio; break;
1242 case DataType::MIDI: ++n_midi; break;
1248 cc.set (DataType::AUDIO, n_audio);
1249 cc.set (DataType::MIDI, n_midi);
1254 DummyAudioBackend::n_physical_inputs () const
1258 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
1259 DummyPort* port = *i;
1260 if (port->is_input () && port->is_physical ()) {
1261 switch (port->type ()) {
1262 case DataType::AUDIO: ++n_audio; break;
1263 case DataType::MIDI: ++n_midi; break;
1269 cc.set (DataType::AUDIO, n_audio);
1270 cc.set (DataType::MIDI, n_midi);
1274 /* Getting access to the data buffer for a port */
1277 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1280 assert (valid_port (port));
1281 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1284 /* Engine Process */
1286 DummyAudioBackend::main_process_thread ()
1288 AudioEngine::thread_init_callback (this);
1290 _processed_samples = 0;
1292 manager.registration_callback();
1293 manager.graph_order_callback();
1299 if (_freewheeling != _freewheel) {
1300 _freewheel = _freewheeling;
1301 engine.freewheel_callback (_freewheel);
1304 // re-set input buffers, generate on demand.
1305 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1306 (*it)->next_period();
1308 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1309 (*it)->next_period();
1312 if (engine.process_callback (_samples_per_period)) {
1315 _processed_samples += _samples_per_period;
1317 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1319 int opc = _system_outputs.size();
1320 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1321 DummyAudioPort* op = _system_outputs[(opn % opc)];
1322 (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
1326 if (_midi_mode == MidiLoopback) {
1328 int opc = _system_midi_out.size();
1329 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1330 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1331 op->get_buffer(0); // mix-down
1332 (*it)->set_loopback (op->const_buffer());
1335 else if (_midi_mode == MidiToAudio) {
1337 int opc = _system_midi_out.size();
1338 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1339 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1340 op->get_buffer(0); // mix-down
1341 (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
1346 _dsp_load_calc.set_start_timestamp_us (clock1);
1347 _dsp_load_calc.set_stop_timestamp_us (_x_get_monotonic_usec());
1348 _dsp_load = _dsp_load_calc.get_dsp_load_unbound ();
1350 const int64_t elapsed_time = _dsp_load_calc.elapsed_time_us ();
1351 const int64_t nominal_time = _dsp_load_calc.get_max_time_us ();
1352 if (elapsed_time < nominal_time) {
1353 const int64_t sleepy = _speedup * (nominal_time - elapsed_time);
1354 Glib::usleep (std::max ((int64_t) 100, sleepy));
1356 Glib::usleep (100); // don't hog cpu
1360 Glib::usleep (100); // don't hog cpu
1363 /* beginning of next cycle */
1364 clock1 = _x_get_monotonic_usec();
1366 bool connections_changed = false;
1367 bool ports_changed = false;
1368 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1369 if (_port_change_flag) {
1370 ports_changed = true;
1371 _port_change_flag = false;
1373 if (!_port_connection_queue.empty ()) {
1374 connections_changed = true;
1376 while (!_port_connection_queue.empty ()) {
1377 PortConnectData *c = _port_connection_queue.back ();
1378 manager.connect_callback (c->a, c->b, c->c);
1379 _port_connection_queue.pop_back ();
1382 pthread_mutex_unlock (&_port_callback_mutex);
1384 if (ports_changed) {
1385 manager.registration_callback();
1387 if (connections_changed) {
1388 manager.graph_order_callback();
1390 if (connections_changed || ports_changed) {
1391 engine.latency_callback(false);
1392 engine.latency_callback(true);
1401 /******************************************************************************/
1403 static boost::shared_ptr<DummyAudioBackend> _instance;
1405 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1406 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1407 static int deinstantiate ();
1408 static bool already_configured ();
1409 static bool available ();
1411 static ARDOUR::AudioBackendInfo _descriptor = {
1420 static boost::shared_ptr<AudioBackend>
1421 backend_factory (AudioEngine& e)
1424 _instance.reset (new DummyAudioBackend (e, _descriptor));
1430 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1432 s_instance_name = arg1;
1444 already_configured ()
1446 // special-case: unit-tests require backend to be pre-configured.
1447 if (s_instance_name == "Unit-Test") {
1459 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1461 return &_descriptor;
1465 /******************************************************************************/
1466 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1467 : _dummy_backend (b)
1471 , _gen_cycle (false)
1473 _capture_latency_range.min = 0;
1474 _capture_latency_range.max = 0;
1475 _playback_latency_range.min = 0;
1476 _playback_latency_range.max = 0;
1477 _dummy_backend.port_connect_add_remove_callback();
1480 DummyPort::~DummyPort () {
1482 _dummy_backend.port_connect_add_remove_callback();
1486 int DummyPort::connect (DummyPort *port)
1489 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1493 if (type () != port->type ()) {
1494 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1498 if (is_output () && port->is_output ()) {
1499 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1503 if (is_input () && port->is_input ()) {
1504 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1509 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1513 if (is_connected (port)) {
1514 #if 0 // don't bother to warn about this for now. just ignore it
1515 PBD::error << _("DummyPort::connect (): ports are already connected:")
1516 << " (" << name () << ") -> (" << port->name () << ")"
1522 _connect (port, true);
1527 void DummyPort::_connect (DummyPort *port, bool callback)
1529 _connections.insert (port);
1531 port->_connect (this, false);
1532 _dummy_backend.port_connect_callback (name(), port->name(), true);
1536 int DummyPort::disconnect (DummyPort *port)
1539 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1543 if (!is_connected (port)) {
1544 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1545 << " (" << name () << ") -> (" << port->name () << ")"
1549 _disconnect (port, true);
1553 void DummyPort::_disconnect (DummyPort *port, bool callback)
1555 std::set<DummyPort*>::iterator it = _connections.find (port);
1556 assert (it != _connections.end ());
1557 _connections.erase (it);
1559 port->_disconnect (this, false);
1560 _dummy_backend.port_connect_callback (name(), port->name(), false);
1565 void DummyPort::disconnect_all ()
1567 while (!_connections.empty ()) {
1568 std::set<DummyPort*>::iterator it = _connections.begin ();
1569 (*it)->_disconnect (this, false);
1570 _dummy_backend.port_connect_callback (name(), (*it)->name(), false);
1571 _connections.erase (it);
1576 DummyPort::is_connected (const DummyPort *port) const
1578 return _connections.find (const_cast<DummyPort *>(port)) != _connections.end ();
1581 bool DummyPort::is_physically_connected () const
1583 for (std::set<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1584 if ((*it)->is_physical ()) {
1591 void DummyPort::setup_random_number_generator ()
1593 #ifdef PLATFORM_WINDOWS
1594 LARGE_INTEGER Count;
1595 if (QueryPerformanceCounter (&Count)) {
1596 _rseed = Count.QuadPart % UINT_MAX;
1600 _rseed = g_get_monotonic_time() % UINT_MAX;
1602 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1603 if (_rseed == 0) _rseed = 1;
1609 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1610 // http://www.firstpr.com.au/dsp/rand31/
1612 lo = 16807 * (_rseed & 0xffff);
1613 hi = 16807 * (_rseed >> 16);
1615 lo += (hi & 0x7fff) << 16;
1618 lo = (lo & 0x7fffffff) + (lo >> 31);
1620 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1622 return (_rseed = lo);
1628 return (randi() / 1073741824.f) - 1.f;
1631 /******************************************************************************/
1633 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1634 : DummyPort (b, name, flags)
1635 , _gen_type (Silence)
1651 memset (_buffer, 0, sizeof (_buffer));
1654 DummyAudioPort::~DummyAudioPort () {
1659 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1661 DummyPort::setup_random_number_generator();
1664 switch (_gen_type) {
1667 case UniformWhiteNoise:
1668 case GaussianWhiteNoise:
1673 _gen_period = 3 * samplerate;
1676 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1679 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1682 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1683 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1684 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1685 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1689 case SquareSweepSwell:
1691 case SineSweepSwell:
1693 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1695 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1696 const double f_min = 20.;
1697 const double f_max = samplerate * .5;
1698 const double g_p2 = _gen_period * .5;
1700 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1701 const double a = f_min / samplerate;
1703 const double b = log (f_max / f_min) / g_p2;
1704 const double a = f_min / (b * samplerate);
1706 const uint32_t g_p2i = rint(g_p2);
1707 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1708 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1710 const double phase = i * (a + b * i);
1712 const double phase = a * exp (b * i) - a;
1714 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1716 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1717 const uint32_t j = _gen_period - i;
1719 const double phase = j * (a + b * j);
1721 const double phase = a * exp (b * j) - a;
1723 _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
1725 if (_gen_type == SquareSweep) {
1726 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1727 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1730 else if (_gen_type == SquareSweepSwell) {
1731 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1732 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1738 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1743 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1745 memset(_wavetable, 0, n_samples * sizeof(float));
1746 /* generate an audio spike for every midi message
1747 * to verify layency-compensation alignment
1748 * (here: midi-out playback-latency + audio-in capture-latency)
1750 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1751 const pframes_t t = (*it)->timestamp();
1752 assert(t < n_samples);
1753 // somewhat arbitrary mapping for quick visual feedback
1755 if ((*it)->size() == 3) {
1756 const unsigned char *d = (*it)->const_data();
1757 if ((d[0] & 0xf0) == 0x90) { // note on
1758 v = .25f + d[2] / 512.f;
1760 else if ((d[0] & 0xf0) == 0x80) { // note off
1761 v = .3f - d[2] / 640.f;
1763 else if ((d[0] & 0xf0) == 0xb0) { // CC
1764 v = -.1f - d[2] / 256.f;
1771 float DummyAudioPort::grandf ()
1773 // Gaussian White Noise
1774 // http://www.musicdsp.org/archive.php?classid=0#109
1785 r = x1 * x1 + x2 * x2;
1786 } while ((r >= 1.0f) || (r < 1e-22f));
1788 r = sqrtf (-2.f * logf (r) / r);
1795 /* inspired by jack-demolition by Steve Harris */
1796 static const float _demolition[] = {
1797 0.0f, /* special case - 0dbFS white noise */
1798 0.0f, /* zero, may cause denomrals following a signal */
1799 0.73 / 1e45, /* very small - should be denormal when floated */
1800 3.7f, /* arbitrary number > 0dBFS */
1801 -4.3f, /* arbitrary negative number > 0dBFS */
1802 4294967395.0f, /* 2^16 + 100 */
1804 HUGE, /* Big, non-inf number */
1805 INFINITY, /* +inf */
1806 -INFINITY, /* -inf */
1809 0.0f, /* some silence to check for recovery */
1812 void DummyAudioPort::generate (const pframes_t n_samples)
1814 Glib::Threads::Mutex::Lock lm (generator_lock);
1819 switch (_gen_type) {
1821 memset (_buffer, 0, n_samples * sizeof (Sample));
1824 for (pframes_t i = 0 ; i < n_samples; ++i) {
1829 switch (_gen_count2) {
1831 for (pframes_t i = 0 ; i < n_samples; ++i) {
1832 _buffer[i] = randf();
1836 for (pframes_t i = 0 ; i < n_samples; ++i) {
1837 _buffer[i] = _demolition [_gen_count2];
1841 _gen_offset += n_samples;
1842 if (_gen_offset > _gen_period) {
1844 _gen_count2 = (_gen_count2 + 1) % (sizeof (_demolition) / sizeof (float));
1848 assert(_gen_period > 0);
1849 for (pframes_t i = 0 ; i < n_samples; ++i) {
1850 if (_gen_offset < _gen_period * .5f) {
1851 _buffer[i] = .40709f; // -6dBFS
1853 _buffer[i] = -.40709f;
1855 _gen_offset = (_gen_offset + 1) % _gen_period;
1859 assert(_gen_period > 0);
1860 memset (_buffer, 0, n_samples * sizeof (Sample));
1861 for (pframes_t i = 0; i < n_samples; ++i) {
1862 if (_gen_offset == 0) {
1865 _gen_offset = (_gen_offset + 1) % _gen_period;
1868 case SineSweepSwell:
1869 case SquareSweepSwell:
1870 assert(_wavetable && _gen_period > 0);
1872 const float vols = 2.f / (float)_gen_perio2;
1873 for (pframes_t i = 0; i < n_samples; ++i) {
1874 const float g = fabsf (_gen_count2 * vols - 1.f);
1875 _buffer[i] = g * _wavetable[_gen_offset];
1876 _gen_offset = (_gen_offset + 1) % _gen_period;
1877 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1882 _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
1886 assert(_wavetable && _gen_period > 0);
1888 pframes_t written = 0;
1889 while (written < n_samples) {
1890 const uint32_t remain = n_samples - written;
1891 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
1892 memcpy((void*)&_buffer[written],
1893 (void*)&_wavetable[_gen_offset],
1894 to_copy * sizeof(Sample));
1896 _gen_offset = (_gen_offset + to_copy) % _gen_period;
1900 case UniformWhiteNoise:
1901 for (pframes_t i = 0 ; i < n_samples; ++i) {
1902 _buffer[i] = .158489f * randf();
1905 case GaussianWhiteNoise:
1906 for (pframes_t i = 0 ; i < n_samples; ++i) {
1907 _buffer[i] = .089125f * grandf();
1911 for (pframes_t i = 0 ; i < n_samples; ++i) {
1912 // Paul Kellet's refined method
1913 // http://www.musicdsp.org/files/pink.txt
1914 // NB. If 'white' consists of uniform random numbers,
1915 // the pink noise will have an almost gaussian distribution.
1916 const float white = .0498f * randf ();
1917 _b0 = .99886f * _b0 + white * .0555179f;
1918 _b1 = .99332f * _b1 + white * .0750759f;
1919 _b2 = .96900f * _b2 + white * .1538520f;
1920 _b3 = .86650f * _b3 + white * .3104856f;
1921 _b4 = .55000f * _b4 + white * .5329522f;
1922 _b5 = -.7616f * _b5 - white * .0168980f;
1923 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
1924 _b6 = white * 0.115926f;
1928 for (pframes_t i = 0 ; i < n_samples; ++i) {
1929 const float white = 0.0498f * randf ();
1930 // Paul Kellet's economy method
1931 // http://www.musicdsp.org/files/pink.txt
1932 _b0 = 0.99765f * _b0 + white * 0.0990460f;
1933 _b1 = 0.96300f * _b1 + white * 0.2965164f;
1934 _b2 = 0.57000f * _b2 + white * 1.0526913f;
1935 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
1942 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1945 const std::set<DummyPort *>& connections = get_connections ();
1946 std::set<DummyPort*>::const_iterator it = connections.begin ();
1947 if (it == connections.end ()) {
1948 memset (_buffer, 0, n_samples * sizeof (Sample));
1950 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1951 assert (source && source->is_output ());
1952 if (source->is_physical() && source->is_terminal()) {
1953 source->get_buffer(n_samples); // generate signal.
1955 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1956 while (++it != connections.end ()) {
1957 source = static_cast<DummyAudioPort*>(*it);
1958 assert (source && source->is_output ());
1959 Sample* dst = buffer ();
1960 if (source->is_physical() && source->is_terminal()) {
1961 source->get_buffer(n_samples); // generate signal.
1963 const Sample* src = source->const_buffer ();
1964 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1969 } else if (is_output () && is_physical () && is_terminal()) {
1971 generate(n_samples);
1978 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1979 : DummyPort (b, name, flags)
1981 , _midi_seq_time (0)
1988 DummyMidiPort::~DummyMidiPort () {
1993 struct MidiEventSorter {
1994 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1999 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
2002 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2003 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2007 void DummyMidiPort::setup_generator (int seq_id, const float sr)
2009 DummyPort::setup_random_number_generator();
2010 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
2011 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
2016 void DummyMidiPort::midi_generate (const pframes_t n_samples)
2018 Glib::Threads::Mutex::Lock lm (generator_lock);
2026 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
2027 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
2028 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2034 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
2035 if (ev_beat_time < 0) {
2038 if ((pframes_t) ev_beat_time >= n_samples) {
2041 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
2043 _midi_seq_dat[_midi_seq_pos].event,
2044 _midi_seq_dat[_midi_seq_pos].size
2048 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
2049 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
2053 _midi_seq_time += n_samples;
2057 void* DummyMidiPort::get_buffer (pframes_t n_samples)
2061 const std::set<DummyPort*>& connections = get_connections ();
2062 for (std::set<DummyPort*>::const_iterator i = connections.begin ();
2063 i != connections.end ();
2065 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
2066 if (source->is_physical() && source->is_terminal()) {
2067 source->get_buffer(n_samples); // generate signal.
2069 const DummyMidiBuffer *src = source->const_buffer ();
2070 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2071 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2074 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
2075 } else if (is_output () && is_physical () && is_terminal()) {
2077 midi_generate(n_samples);
2083 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2085 , _timestamp (timestamp)
2089 _data = (uint8_t*) malloc (size);
2090 memcpy (_data, data, size);
2094 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
2095 : _size (other.size ())
2096 , _timestamp (other.timestamp ())
2099 if (other.size () && other.const_data ()) {
2100 _data = (uint8_t*) malloc (other.size ());
2101 memcpy (_data, other.const_data (), other.size ());
2105 DummyMidiEvent::~DummyMidiEvent () {