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 "pbd/compose.h"
37 #include "ardour/port_manager.h"
40 using namespace ARDOUR;
42 static std::string s_instance_name;
43 size_t DummyAudioBackend::_max_buffer_size = 8192;
44 std::vector<std::string> DummyAudioBackend::_midi_options;
45 std::vector<AudioBackend::DeviceStatus> DummyAudioBackend::_device_status;
47 std::vector<DummyAudioBackend::DriverSpeed> DummyAudioBackend::_driver_speed;
49 static int64_t _x_get_monotonic_usec() {
50 #ifdef PLATFORM_WINDOWS
51 return PBD::get_microseconds();
53 return g_get_monotonic_time();
56 DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
57 : AudioBackend (e, info)
60 , _freewheeling (false)
64 , _samples_per_period (1024)
70 , _midi_mode (MidiNoEvents)
71 , _systemic_input_latency (0)
72 , _systemic_output_latency (0)
73 , _processed_samples (0)
74 , _port_change_flag (false)
76 _instance_name = s_instance_name;
77 _device = _("Silence");
78 pthread_mutex_init (&_port_callback_mutex, 0);
80 if (_driver_speed.empty()) {
81 _driver_speed.push_back (DriverSpeed (_("Half Speed"), 2.0f));
82 _driver_speed.push_back (DriverSpeed (_("Normal Speed"), 1.0f));
83 _driver_speed.push_back (DriverSpeed (_("Double Speed"), 0.5f));
84 _driver_speed.push_back (DriverSpeed (_("5x Speed"), 0.2f));
85 _driver_speed.push_back (DriverSpeed (_("10x Speed"), 0.1f));
86 _driver_speed.push_back (DriverSpeed (_("15x Speed"), 0.06666f));
87 _driver_speed.push_back (DriverSpeed (_("20x Speed"), 0.05f));
88 _driver_speed.push_back (DriverSpeed (_("50x Speed"), 0.02f));
93 DummyAudioBackend::~DummyAudioBackend ()
95 pthread_mutex_destroy (&_port_callback_mutex);
98 /* AUDIOBACKEND API */
101 DummyAudioBackend::name () const
103 return X_("Dummy"); // internal name
107 DummyAudioBackend::is_realtime () const
112 std::vector<AudioBackend::DeviceStatus>
113 DummyAudioBackend::enumerate_devices () const
115 if (_device_status.empty()) {
116 _device_status.push_back (DeviceStatus (_("Silence"), true));
117 _device_status.push_back (DeviceStatus (_("DC -6dBFS (+.5)"), true));
118 _device_status.push_back (DeviceStatus (_("Demolition"), true));
119 _device_status.push_back (DeviceStatus (_("Sine Wave"), true));
120 _device_status.push_back (DeviceStatus (_("Sine Wave 1K, 1/3 Oct"), true));
121 _device_status.push_back (DeviceStatus (_("Square Wave"), true));
122 _device_status.push_back (DeviceStatus (_("Impulses"), true));
123 _device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
124 _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
125 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
126 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
127 _device_status.push_back (DeviceStatus (_("Sine Sweep"), true));
128 _device_status.push_back (DeviceStatus (_("Sine Sweep Swell"), true));
129 _device_status.push_back (DeviceStatus (_("Square Sweep"), true));
130 _device_status.push_back (DeviceStatus (_("Square Sweep Swell"), true));
131 _device_status.push_back (DeviceStatus (_("LTC"), true));
132 _device_status.push_back (DeviceStatus (_("Loopback"), true));
134 return _device_status;
138 DummyAudioBackend::available_sample_rates (const std::string&) const
140 std::vector<float> sr;
141 sr.push_back (8000.0);
142 sr.push_back (22050.0);
143 sr.push_back (24000.0);
144 sr.push_back (44100.0);
145 sr.push_back (48000.0);
146 sr.push_back (88200.0);
147 sr.push_back (96000.0);
148 sr.push_back (176400.0);
149 sr.push_back (192000.0);
153 std::vector<uint32_t>
154 DummyAudioBackend::available_buffer_sizes (const std::string&) const
156 std::vector<uint32_t> bs;
173 DummyAudioBackend::available_input_channel_count (const std::string&) const
179 DummyAudioBackend::available_output_channel_count (const std::string&) const
185 DummyAudioBackend::can_change_sample_rate_when_running () const
191 DummyAudioBackend::can_change_buffer_size_when_running () const
196 std::vector<std::string>
197 DummyAudioBackend::enumerate_drivers () const
199 std::vector<std::string> speed_drivers;
200 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
201 speed_drivers.push_back (it->name);
203 return speed_drivers;
207 DummyAudioBackend::driver_name () const
209 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
210 if (rintf (1e6f * _speedup) == rintf (1e6f * it->speedup)) {
215 return _("Normal Speed");
219 DummyAudioBackend::set_driver (const std::string& d)
221 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
223 _speedup = it->speedup;
232 DummyAudioBackend::set_device_name (const std::string& d)
239 DummyAudioBackend::set_sample_rate (float sr)
241 if (sr <= 0) { return -1; }
243 engine.sample_rate_change (sr);
248 DummyAudioBackend::set_buffer_size (uint32_t bs)
250 if (bs <= 0 || bs > _max_buffer_size) {
253 _samples_per_period = bs;
255 /* update port latencies
256 * with 'Loopback' there is exactly once cycle latency,
257 * divide it between In + Out;
260 lr.min = lr.max = _systemic_input_latency;
261 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
262 set_latency_range (*it, false, lr);
264 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
265 set_latency_range (*it, false, lr);
268 lr.min = lr.max = _systemic_output_latency;
269 for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
270 set_latency_range (*it, true, lr);
272 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
273 set_latency_range (*it, true, lr);
276 engine.buffer_size_change (bs);
281 DummyAudioBackend::set_interleaved (bool yn)
283 if (!yn) { return 0; }
288 DummyAudioBackend::set_input_channels (uint32_t cc)
295 DummyAudioBackend::set_output_channels (uint32_t cc)
302 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
304 _systemic_input_latency = sl;
309 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
311 _systemic_output_latency = sl;
315 /* Retrieving parameters */
317 DummyAudioBackend::device_name () const
323 DummyAudioBackend::sample_rate () const
329 DummyAudioBackend::buffer_size () const
331 return _samples_per_period;
335 DummyAudioBackend::interleaved () const
341 DummyAudioBackend::input_channels () const
347 DummyAudioBackend::output_channels () const
353 DummyAudioBackend::systemic_input_latency () const
355 return _systemic_input_latency;
359 DummyAudioBackend::systemic_output_latency () const
361 return _systemic_output_latency;
366 std::vector<std::string>
367 DummyAudioBackend::enumerate_midi_options () const
369 if (_midi_options.empty()) {
370 _midi_options.push_back (_("1 in, 1 out, Silence"));
371 _midi_options.push_back (_("2 in, 2 out, Silence"));
372 _midi_options.push_back (_("8 in, 8 out, Silence"));
373 _midi_options.push_back (_("Midi Event Generators"));
374 _midi_options.push_back (_("8 in, 8 out, Loopback"));
375 _midi_options.push_back (_("MIDI to Audio, Loopback"));
376 _midi_options.push_back (_("No MIDI I/O"));
378 return _midi_options;
382 DummyAudioBackend::set_midi_option (const std::string& opt)
384 _midi_mode = MidiNoEvents;
385 if (opt == _("1 in, 1 out, Silence")) {
386 _n_midi_inputs = _n_midi_outputs = 1;
388 else if (opt == _("2 in, 2 out, Silence")) {
389 _n_midi_inputs = _n_midi_outputs = 2;
391 else if (opt == _("8 in, 8 out, Silence")) {
392 _n_midi_inputs = _n_midi_outputs = 8;
394 else if (opt == _("Midi Event Generators")) {
395 _n_midi_inputs = _n_midi_outputs = NUM_MIDI_EVENT_GENERATORS;
396 _midi_mode = MidiGenerator;
398 else if (opt == _("8 in, 8 out, Loopback")) {
399 _n_midi_inputs = _n_midi_outputs = 8;
400 _midi_mode = MidiLoopback;
402 else if (opt == _("MIDI to Audio, Loopback")) {
403 _n_midi_inputs = _n_midi_outputs = UINT32_MAX;
404 _midi_mode = MidiToAudio;
407 _n_midi_inputs = _n_midi_outputs = 0;
413 DummyAudioBackend::midi_option () const
420 static void * pthread_process (void *arg)
422 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
423 d->main_process_thread ();
429 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
432 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
433 return BackendReinitializationError;
436 if (_ports.size () || _portmap.size ()) {
437 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
438 for (PortIndex::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
439 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
441 for (PortMap::const_iterator it = _portmap.begin (); it != _portmap.end (); ++it) {
442 PBD::info << _("DummyAudioBackend: portmap '") << (*it).first << "' exists." << endmsg;
444 _system_inputs.clear();
445 _system_outputs.clear();
446 _system_midi_in.clear();
447 _system_midi_out.clear();
452 if (register_system_ports()) {
453 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
454 return PortRegistrationError;
457 engine.sample_rate_change (_samplerate);
458 engine.buffer_size_change (_samples_per_period);
460 if (engine.reestablish_ports ()) {
461 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
463 return PortReconnectError;
466 engine.reconnect_ports ();
467 _port_change_flag = false;
469 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
470 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
474 while (!_running && --timeout > 0) { Glib::usleep (1000); }
476 if (timeout == 0 || !_running) {
477 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
478 return ProcessThreadStartError;
485 DummyAudioBackend::stop ()
493 if (pthread_join (_main_thread, &status)) {
494 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
502 DummyAudioBackend::freewheel (bool onoff)
504 _freewheeling = onoff;
509 DummyAudioBackend::dsp_load () const
511 return 100.f * _dsp_load;
515 DummyAudioBackend::raw_buffer_size (DataType t)
518 case DataType::AUDIO:
519 return _samples_per_period * sizeof(Sample);
521 return _max_buffer_size; // XXX not really limited
528 DummyAudioBackend::sample_time ()
530 return _processed_samples;
534 DummyAudioBackend::sample_time_at_cycle_start ()
536 return _processed_samples;
540 DummyAudioBackend::samples_since_cycle_start ()
547 DummyAudioBackend::dummy_process_thread (void *arg)
549 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
550 boost::function<void ()> f = td->f;
557 DummyAudioBackend::create_process_thread (boost::function<void()> func)
561 size_t stacksize = 100000;
563 pthread_attr_init (&attr);
564 pthread_attr_setstacksize (&attr, stacksize);
565 ThreadData* td = new ThreadData (this, func, stacksize);
567 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
568 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
569 pthread_attr_destroy (&attr);
572 pthread_attr_destroy (&attr);
574 _threads.push_back (thread_id);
579 DummyAudioBackend::join_process_threads ()
583 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
586 if (pthread_join (*i, &status)) {
587 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
596 DummyAudioBackend::in_process_thread ()
598 if (pthread_equal (_main_thread, pthread_self()) != 0) {
602 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
604 if (pthread_equal (*i, pthread_self ()) != 0) {
612 DummyAudioBackend::process_thread_count ()
614 return _threads.size ();
618 DummyAudioBackend::update_latencies ()
620 // trigger latency callback in RT thread (locked graph)
621 port_connect_add_remove_callback();
627 DummyAudioBackend::private_handle () const
633 DummyAudioBackend::my_name () const
635 return _instance_name;
639 DummyAudioBackend::available () const
645 DummyAudioBackend::port_name_size () const
651 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
653 std::string newname (_instance_name + ":" + name);
655 if (!valid_port (port)) {
656 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
660 if (find_port (newname)) {
661 PBD::error << _("DummyBackend::set_port_name: Port with given name already exists") << endmsg;
665 DummyPort* p = static_cast<DummyPort*>(port);
666 _portmap.erase (p->name());
667 _portmap.insert (make_pair (newname, p));
668 return p->set_name (newname);
672 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
674 if (!valid_port (port)) {
675 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
676 return std::string ();
678 return static_cast<DummyPort*>(port)->name ();
682 DummyAudioBackend::get_port_flags (PortEngine::PortHandle port) const
684 if (!valid_port (port)) {
685 PBD::error << _("DummyBackend::get_port_flags: Invalid Port(s)") << endmsg;
686 return PortFlags (0);
688 return static_cast<DummyPort*>(port)->flags ();
692 DummyAudioBackend::get_port_property (PortHandle port, const std::string& key, std::string& value, std::string& type) const
694 if (!valid_port (port)) {
695 PBD::warning << _("DummyBackend::get_port_property: Invalid Port(s)") << endmsg;
698 if (key == "http://jackaudio.org/metadata/pretty-name") {
700 value = static_cast<DummyPort*>(port)->pretty_name ();
701 if (!value.empty()) {
709 DummyAudioBackend::set_port_property (PortHandle port, const std::string& key, const std::string& value, const std::string& type)
711 if (!valid_port (port)) {
712 PBD::warning << _("DummyBackend::set_port_property: Invalid Port(s)") << endmsg;
715 if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
716 static_cast<DummyPort*>(port)->set_pretty_name (value);
722 PortEngine::PortHandle
723 DummyAudioBackend::get_port_by_name (const std::string& name) const
725 PortHandle port = (PortHandle) find_port (name);
730 DummyAudioBackend::get_ports (
731 const std::string& port_name_pattern,
732 DataType type, PortFlags flags,
733 std::vector<std::string>& port_names) const
737 bool use_regexp = false;
738 if (port_name_pattern.size () > 0) {
739 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
744 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
745 DummyPort* port = *i;
746 if ((port->type () == type) && flags == (port->flags () & flags)) {
747 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
748 port_names.push_back (port->name ());
754 regfree (&port_regex);
760 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
762 if (!valid_port (port)) {
763 return DataType::NIL;
765 return static_cast<DummyPort*>(port)->type ();
768 PortEngine::PortHandle
769 DummyAudioBackend::register_port (
770 const std::string& name,
771 ARDOUR::DataType type,
772 ARDOUR::PortFlags flags)
774 if (name.size () == 0) { return 0; }
775 if (flags & IsPhysical) { return 0; }
777 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
779 return add_port (_instance_name + ":" + name, type, flags);
782 PortEngine::PortHandle
783 DummyAudioBackend::add_port (
784 const std::string& name,
785 ARDOUR::DataType type,
786 ARDOUR::PortFlags flags)
788 assert(name.size ());
789 if (find_port (name)) {
790 PBD::error << _("DummyBackend::register_port: Port already exists:")
791 << " (" << name << ")" << endmsg;
794 DummyPort* port = NULL;
796 case DataType::AUDIO:
797 port = new DummyAudioPort (*this, name, flags);
800 port = new DummyMidiPort (*this, name, flags);
803 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
807 _ports.insert (port);
808 _portmap.insert (make_pair (name, port));
814 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
817 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
818 assert (!valid_port (port_handle));
821 DummyPort* port = static_cast<DummyPort*>(port_handle);
822 PortIndex::iterator i = std::find (_ports.begin(), _ports.end(), static_cast<DummyPort*>(port_handle));
823 if (i == _ports.end ()) {
824 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
827 disconnect_all(port_handle);
828 _portmap.erase (port->name());
834 DummyAudioBackend::register_system_ports()
837 enum DummyAudioPort::GeneratorType gt;
838 if (_device == _("Uniform White Noise")) {
839 gt = DummyAudioPort::UniformWhiteNoise;
840 } else if (_device == _("Gaussian White Noise")) {
841 gt = DummyAudioPort::GaussianWhiteNoise;
842 } else if (_device == _("Pink Noise")) {
843 gt = DummyAudioPort::PinkNoise;
844 } else if (_device == _("Pink Noise (low CPU)")) {
845 gt = DummyAudioPort::PonyNoise;
846 } else if (_device == _("Sine Wave")) {
847 gt = DummyAudioPort::SineWave;
848 } else if (_device == _("Sine Wave 1K, 1/3 Oct")) {
849 gt = DummyAudioPort::SineWaveOctaves;
850 } else if (_device == _("Square Wave")) {
851 gt = DummyAudioPort::SquareWave;
852 } else if (_device == _("Impulses")) {
853 gt = DummyAudioPort::KronekerDelta;
854 } else if (_device == _("Sine Sweep")) {
855 gt = DummyAudioPort::SineSweep;
856 } else if (_device == _("Sine Sweep Swell")) {
857 gt = DummyAudioPort::SineSweepSwell;
858 } else if (_device == _("Square Sweep")) {
859 gt = DummyAudioPort::SquareSweep;
860 } else if (_device == _("Square Sweep Swell")) {
861 gt = DummyAudioPort::SquareSweepSwell;
862 } else if (_device == _("LTC")) {
863 gt = DummyAudioPort::LTC;
864 } else if (_device == _("Loopback")) {
865 gt = DummyAudioPort::Loopback;
866 } else if (_device == _("Demolition")) {
867 gt = DummyAudioPort::Demolition;
868 } else if (_device == _("DC -6dBFS (+.5)")) {
869 gt = DummyAudioPort::DC05;
871 gt = DummyAudioPort::Silence;
874 if (_midi_mode == MidiToAudio) {
875 gt = DummyAudioPort::Loopback;
878 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
879 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
880 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
881 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
885 lr.min = lr.max = _systemic_input_latency;
886 for (int i = 1; i <= a_ins; ++i) {
888 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
889 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
891 set_latency_range (p, false, lr);
892 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
893 std::string name = static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate, i - 1, a_ins);
894 if (!name.empty ()) {
895 static_cast<DummyAudioPort*>(p)->set_pretty_name (name);
899 lr.min = lr.max = _systemic_output_latency;
900 for (int i = 1; i <= a_out; ++i) {
902 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
903 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
905 set_latency_range (p, true, lr);
906 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
910 lr.min = lr.max = _systemic_input_latency;
911 for (int i = 0; i < m_ins; ++i) {
913 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
914 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
916 set_latency_range (p, false, lr);
917 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
918 if (_midi_mode == MidiGenerator) {
919 std::string name = static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
920 if (!name.empty ()) {
921 static_cast<DummyMidiPort*>(p)->set_pretty_name (name);
926 lr.min = lr.max = _systemic_output_latency;
927 for (int i = 1; i <= m_out; ++i) {
929 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
930 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
932 set_latency_range (p, true, lr);
933 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
935 if (_device == _("Loopback") && _midi_mode == MidiToAudio) {
936 std::stringstream ss;
938 for (int apc = 0; apc < (int)_system_inputs.size(); ++apc) {
939 if ((apc % m_out) + 1 == i) {
940 ss << " >" << (apc + 1);
943 static_cast<DummyMidiPort*>(p)->set_pretty_name (ss.str());
950 DummyAudioBackend::unregister_ports (bool system_only)
952 _system_inputs.clear();
953 _system_outputs.clear();
954 _system_midi_in.clear();
955 _system_midi_out.clear();
957 for (PortIndex::iterator i = _ports.begin (); i != _ports.end ();) {
958 PortIndex::iterator cur = i++;
959 DummyPort* port = *cur;
960 if (! system_only || (port->is_physical () && port->is_terminal ())) {
961 port->disconnect_all ();
962 _portmap.erase (port->name());
970 DummyAudioBackend::update_system_port_latecies ()
972 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
973 (*it)->update_connected_latency (true);
975 for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
976 (*it)->update_connected_latency (false);
979 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
980 (*it)->update_connected_latency (true);
982 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
983 (*it)->update_connected_latency (false);
988 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
990 DummyPort* src_port = find_port (src);
991 DummyPort* dst_port = find_port (dst);
994 PBD::error << _("DummyBackend::connect: Invalid Source port:")
995 << " (" << src <<")" << endmsg;
999 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
1000 << " (" << dst <<")" << endmsg;
1003 return src_port->connect (dst_port);
1007 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
1009 DummyPort* src_port = find_port (src);
1010 DummyPort* dst_port = find_port (dst);
1012 if (!src_port || !dst_port) {
1013 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
1016 return src_port->disconnect (dst_port);
1020 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1022 DummyPort* dst_port = find_port (dst);
1023 if (!valid_port (src)) {
1024 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
1028 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
1029 << " (" << dst << ")" << endmsg;
1032 return static_cast<DummyPort*>(src)->connect (dst_port);
1036 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1038 DummyPort* dst_port = find_port (dst);
1039 if (!valid_port (src) || !dst_port) {
1040 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
1043 return static_cast<DummyPort*>(src)->disconnect (dst_port);
1047 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
1049 if (!valid_port (port)) {
1050 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1053 static_cast<DummyPort*>(port)->disconnect_all ();
1058 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1060 if (!valid_port (port)) {
1061 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1064 return static_cast<DummyPort*>(port)->is_connected ();
1068 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1070 DummyPort* dst_port = find_port (dst);
1072 if (!valid_port (src) || !dst_port) {
1073 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
1077 return static_cast<DummyPort*>(src)->is_connected (dst_port);
1081 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1083 if (!valid_port (port)) {
1084 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
1087 return static_cast<DummyPort*>(port)->is_physically_connected ();
1091 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1093 if (!valid_port (port)) {
1094 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
1098 assert (0 == names.size ());
1100 const std::set<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
1102 for (std::set<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1103 names.push_back ((*i)->name ());
1106 return (int)names.size ();
1111 DummyAudioBackend::midi_event_get (
1112 pframes_t& timestamp,
1113 size_t& size, uint8_t const** buf, void* port_buffer,
1114 uint32_t event_index)
1116 assert (buf && port_buffer);
1117 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
1118 if (event_index >= source.size ()) {
1121 DummyMidiEvent * const event = source[event_index].get ();
1123 timestamp = event->timestamp ();
1124 size = event->size ();
1125 *buf = event->data ();
1130 DummyAudioBackend::midi_event_put (
1132 pframes_t timestamp,
1133 const uint8_t* buffer, size_t size)
1135 assert (buffer && port_buffer);
1136 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
1137 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1138 // nevermind, ::get_buffer() sorts events, but always print warning
1139 fprintf (stderr, "DummyMidiBuffer: it's too late for this event %d > %d.\n", (pframes_t)dst.back ()->timestamp (), timestamp);
1141 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
1142 #if 0 // DEBUG MIDI EVENTS
1143 printf("DummyAudioBackend::midi_event_put %d, %zu: ", timestamp, size);
1144 for (size_t xx = 0; xx < size; ++xx) {
1145 printf(" %02x", buffer[xx]);
1153 DummyAudioBackend::get_midi_event_count (void* port_buffer)
1155 assert (port_buffer);
1156 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1160 DummyAudioBackend::midi_clear (void* port_buffer)
1162 assert (port_buffer);
1163 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1171 DummyAudioBackend::can_monitor_input () const
1177 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1183 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1189 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1194 /* Latency management */
1197 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1199 if (!valid_port (port)) {
1200 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1202 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1206 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1209 if (!valid_port (port)) {
1210 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1215 DummyPort *p = static_cast<DummyPort*>(port);
1218 r = p->latency_range (for_playback);
1219 if (p->is_physical() && p->is_terminal()) {
1220 if (p->is_input() && for_playback) {
1221 const size_t l_in = _samples_per_period * .25;
1225 if (p->is_output() && !for_playback) {
1226 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1227 const size_t l_in = _samples_per_period * .25;
1228 const size_t l_out = _samples_per_period - l_in;
1236 /* Discovering physical ports */
1239 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1241 if (!valid_port (port)) {
1242 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1245 return static_cast<DummyPort*>(port)->is_physical ();
1249 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1251 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1252 DummyPort* port = *i;
1253 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1254 port_names.push_back (port->name ());
1260 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1262 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1263 DummyPort* port = *i;
1264 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1265 port_names.push_back (port->name ());
1271 DummyAudioBackend::n_physical_outputs () const
1275 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
1276 DummyPort* port = *i;
1277 if (port->is_output () && port->is_physical ()) {
1278 switch (port->type ()) {
1279 case DataType::AUDIO: ++n_audio; break;
1280 case DataType::MIDI: ++n_midi; break;
1286 cc.set (DataType::AUDIO, n_audio);
1287 cc.set (DataType::MIDI, n_midi);
1292 DummyAudioBackend::n_physical_inputs () const
1296 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
1297 DummyPort* port = *i;
1298 if (port->is_input () && port->is_physical ()) {
1299 switch (port->type ()) {
1300 case DataType::AUDIO: ++n_audio; break;
1301 case DataType::MIDI: ++n_midi; break;
1307 cc.set (DataType::AUDIO, n_audio);
1308 cc.set (DataType::MIDI, n_midi);
1312 /* Getting access to the data buffer for a port */
1315 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1318 assert (valid_port (port));
1319 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1322 /* Engine Process */
1324 DummyAudioBackend::main_process_thread ()
1326 AudioEngine::thread_init_callback (this);
1328 _processed_samples = 0;
1330 manager.registration_callback();
1331 manager.graph_order_callback();
1336 const size_t samples_per_period = _samples_per_period;
1338 if (_freewheeling != _freewheel) {
1339 _freewheel = _freewheeling;
1340 engine.freewheel_callback (_freewheel);
1343 // re-set input buffers, generate on demand.
1344 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1345 (*it)->next_period();
1347 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1348 (*it)->next_period();
1351 if (engine.process_callback (samples_per_period)) {
1354 _processed_samples += samples_per_period;
1356 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1358 int opc = _system_outputs.size();
1359 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1360 DummyAudioPort* op = _system_outputs[(opn % opc)];
1361 (*it)->fill_wavetable ((const float*)op->get_buffer (samples_per_period), samples_per_period);
1365 if (_midi_mode == MidiLoopback) {
1367 int opc = _system_midi_out.size();
1368 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1369 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1370 op->get_buffer(0); // mix-down
1371 (*it)->set_loopback (op->const_buffer());
1374 else if (_midi_mode == MidiToAudio) {
1376 int opc = _system_midi_out.size();
1377 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1378 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1379 op->get_buffer(0); // mix-down
1380 (*it)->midi_to_wavetable (op->const_buffer(), samples_per_period);
1385 _dsp_load_calc.set_max_time (_samplerate, samples_per_period);
1386 _dsp_load_calc.set_start_timestamp_us (clock1);
1387 _dsp_load_calc.set_stop_timestamp_us (_x_get_monotonic_usec());
1388 _dsp_load = _dsp_load_calc.get_dsp_load_unbound ();
1390 const int64_t elapsed_time = _dsp_load_calc.elapsed_time_us ();
1391 const int64_t nominal_time = _dsp_load_calc.get_max_time_us ();
1392 if (elapsed_time < nominal_time) {
1393 const int64_t sleepy = _speedup * (nominal_time - elapsed_time);
1394 Glib::usleep (std::max ((int64_t) 100, sleepy));
1396 Glib::usleep (100); // don't hog cpu
1400 Glib::usleep (100); // don't hog cpu
1403 /* beginning of next cycle */
1404 clock1 = _x_get_monotonic_usec();
1406 bool connections_changed = false;
1407 bool ports_changed = false;
1408 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1409 if (_port_change_flag) {
1410 ports_changed = true;
1411 _port_change_flag = false;
1413 if (!_port_connection_queue.empty ()) {
1414 connections_changed = true;
1416 while (!_port_connection_queue.empty ()) {
1417 PortConnectData *c = _port_connection_queue.back ();
1418 manager.connect_callback (c->a, c->b, c->c);
1419 _port_connection_queue.pop_back ();
1422 pthread_mutex_unlock (&_port_callback_mutex);
1424 if (ports_changed) {
1425 manager.registration_callback();
1427 if (connections_changed) {
1428 manager.graph_order_callback();
1430 if (connections_changed || ports_changed) {
1431 update_system_port_latecies ();
1432 engine.latency_callback(false);
1433 engine.latency_callback(true);
1442 /******************************************************************************/
1444 static boost::shared_ptr<DummyAudioBackend> _instance;
1446 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1447 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1448 static int deinstantiate ();
1449 static bool already_configured ();
1450 static bool available ();
1452 static ARDOUR::AudioBackendInfo _descriptor = {
1461 static boost::shared_ptr<AudioBackend>
1462 backend_factory (AudioEngine& e)
1465 _instance.reset (new DummyAudioBackend (e, _descriptor));
1471 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1473 s_instance_name = arg1;
1485 already_configured ()
1487 // special-case: unit-tests require backend to be pre-configured.
1488 if (s_instance_name == "Unit-Test") {
1500 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1502 return &_descriptor;
1506 /******************************************************************************/
1507 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1508 : _dummy_backend (b)
1512 , _gen_cycle (false)
1514 _capture_latency_range.min = 0;
1515 _capture_latency_range.max = 0;
1516 _playback_latency_range.min = 0;
1517 _playback_latency_range.max = 0;
1518 _dummy_backend.port_connect_add_remove_callback();
1521 DummyPort::~DummyPort () {
1523 _dummy_backend.port_connect_add_remove_callback();
1527 int DummyPort::connect (DummyPort *port)
1530 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1534 if (type () != port->type ()) {
1535 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1539 if (is_output () && port->is_output ()) {
1540 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1544 if (is_input () && port->is_input ()) {
1545 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1550 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1554 if (is_connected (port)) {
1555 #if 0 // don't bother to warn about this for now. just ignore it
1556 PBD::error << _("DummyPort::connect (): ports are already connected:")
1557 << " (" << name () << ") -> (" << port->name () << ")"
1563 _connect (port, true);
1568 void DummyPort::_connect (DummyPort *port, bool callback)
1570 _connections.insert (port);
1572 port->_connect (this, false);
1573 _dummy_backend.port_connect_callback (name(), port->name(), true);
1577 int DummyPort::disconnect (DummyPort *port)
1580 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1584 if (!is_connected (port)) {
1585 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1586 << " (" << name () << ") -> (" << port->name () << ")"
1590 _disconnect (port, true);
1594 void DummyPort::_disconnect (DummyPort *port, bool callback)
1596 std::set<DummyPort*>::iterator it = _connections.find (port);
1597 assert (it != _connections.end ());
1598 _connections.erase (it);
1600 port->_disconnect (this, false);
1601 _dummy_backend.port_connect_callback (name(), port->name(), false);
1606 void DummyPort::disconnect_all ()
1608 while (!_connections.empty ()) {
1609 std::set<DummyPort*>::iterator it = _connections.begin ();
1610 (*it)->_disconnect (this, false);
1611 _dummy_backend.port_connect_callback (name(), (*it)->name(), false);
1612 _connections.erase (it);
1617 DummyPort::is_connected (const DummyPort *port) const
1619 return _connections.find (const_cast<DummyPort *>(port)) != _connections.end ();
1622 bool DummyPort::is_physically_connected () const
1624 for (std::set<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1625 if ((*it)->is_physical ()) {
1633 DummyPort::set_latency_range (const LatencyRange &latency_range, bool for_playback)
1636 _playback_latency_range = latency_range;
1638 _capture_latency_range = latency_range;
1641 for (std::set<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1642 if ((*it)->is_physical ()) {
1643 (*it)->update_connected_latency (is_input ());
1649 DummyPort::update_connected_latency (bool for_playback)
1652 lr.min = lr.max = 0;
1653 for (std::set<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1655 l = (*it)->latency_range (for_playback);
1656 lr.min = std::max (lr.min, l.min);
1657 lr.max = std::max (lr.max, l.max);
1659 set_latency_range (lr, for_playback);
1662 void DummyPort::setup_random_number_generator ()
1664 #ifdef PLATFORM_WINDOWS
1665 LARGE_INTEGER Count;
1666 if (QueryPerformanceCounter (&Count)) {
1667 _rseed = Count.QuadPart % UINT_MAX;
1671 _rseed = g_get_monotonic_time() % UINT_MAX;
1673 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1674 if (_rseed == 0) _rseed = 1;
1680 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1681 // http://www.firstpr.com.au/dsp/rand31/
1683 lo = 16807 * (_rseed & 0xffff);
1684 hi = 16807 * (_rseed >> 16);
1686 lo += (hi & 0x7fff) << 16;
1689 lo = (lo & 0x7fffffff) + (lo >> 31);
1691 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1693 return (_rseed = lo);
1699 return (randi() / 1073741824.f) - 1.f;
1702 /******************************************************************************/
1704 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1705 : DummyPort (b, name, flags)
1706 , _gen_type (Silence)
1724 memset (_buffer, 0, sizeof (_buffer));
1727 DummyAudioPort::~DummyAudioPort () {
1729 ltc_encoder_free (_ltc);
1736 static std::string format_hz (float freq) {
1737 std::stringstream ss;
1738 if (freq >= 10000) {
1739 ss << std::setprecision (1) << std::fixed << freq / 1000 << "kHz";
1740 } else if (freq >= 1000) {
1741 ss << std::setprecision (2) << std::fixed << freq / 1000 << "kHz";
1743 ss << std::setprecision (1) << std::fixed << freq << "Hz";
1748 static size_t fit_wave (float freq, float rate, float precision = 0.001) {
1749 const size_t max_mult = floor (freq * rate);
1752 for (size_t i = 1; i < max_mult; ++i) {
1753 const float isc = rate * (float)i / freq; // ideal sample count
1754 const float rsc = rintf (isc); // rounded sample count
1755 const float err = fabsf (isc - rsc);
1760 if (err < precision) {
1764 //printf(" FIT %8.1f Hz / %8.1f Hz * %ld = %.0f (err: %e)\n", freq, rate, fact, fact * rate / freq, minErr);
1769 DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate, int c, int total)
1772 DummyPort::setup_random_number_generator();
1775 switch (_gen_type) {
1778 case UniformWhiteNoise:
1779 case GaussianWhiteNoise:
1784 _gen_period = 3 * samplerate;
1787 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1788 name = "Delta " + format_hz (samplerate / _gen_period);
1791 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1792 name = "Square " + format_hz (samplerate / _gen_period);
1794 case SineWaveOctaves:
1796 const int x = c - floor (((float)total / 2));
1797 float f = powf (2.f, x / 3.f) * 1000.f;
1798 f = std::max (10.f, std::min (samplerate *.5f, f));
1799 const size_t mult = fit_wave (f, samplerate);
1800 _gen_period = rintf ((float)mult * samplerate / f);
1801 name = "Sine " + format_hz (samplerate * mult / (float)_gen_period);
1802 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1803 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1804 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)mult * (float)i / (float)(_gen_period)); // -18dBFS
1809 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1810 name = "Sine " + format_hz (samplerate / _gen_period);
1811 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1812 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1813 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1817 case SquareSweepSwell:
1819 case SineSweepSwell:
1821 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1823 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1824 const double f_min = 20.;
1825 const double f_max = samplerate * .5;
1826 const double g_p2 = _gen_period * .5;
1828 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1829 const double a = f_min / samplerate;
1831 const double b = log (f_max / f_min) / g_p2;
1832 const double a = f_min / (b * samplerate);
1834 const uint32_t g_p2i = rint(g_p2);
1835 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1836 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1838 const double phase = i * (a + b * i);
1840 const double phase = a * exp (b * i) - a;
1842 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1844 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1845 const uint32_t j = _gen_period - i;
1847 const double phase = j * (a + b * j);
1849 const double phase = a * exp (b * j) - a;
1851 _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
1853 if (_gen_type == SquareSweep) {
1854 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1855 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1858 else if (_gen_type == SquareSweepSwell) {
1859 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1860 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1868 _ltc = ltc_encoder_create (samplerate, 25, LTC_TV_625_50, 0);
1872 _ltc = ltc_encoder_create (samplerate, 30, LTC_TV_1125_60, 0);
1876 _ltc = ltc_encoder_create (samplerate, 30001.f / 1001.f, LTC_TV_525_60, 0);
1880 _ltc = ltc_encoder_create (samplerate, 24, LTC_TV_FILM_24, 0);
1885 _ltc_rand = floor((float)c / 4) * .001f;
1887 name += " (locked)";
1889 name += " (varspd)";
1895 tc.hours = (3 * (c / 4)) % 24; // XXX
1899 ltc_encoder_set_timecode (_ltc, &tc);
1900 name += string_compose ("@%1h", (int)tc.hours);
1901 _ltcbuf = new PBD::RingBuffer<Sample> (std::max (DummyAudioBackend::max_buffer_size() * 2.f, samplerate));
1904 _wavetable = (Sample*) calloc (DummyAudioBackend::max_buffer_size(), sizeof(Sample));
1910 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1912 memset(_wavetable, 0, n_samples * sizeof(float));
1913 /* generate an audio spike for every midi message
1914 * to verify layency-compensation alignment
1915 * (here: midi-out playback-latency + audio-in capture-latency)
1917 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1918 const pframes_t t = (*it)->timestamp();
1919 assert(t < n_samples);
1920 // somewhat arbitrary mapping for quick visual feedback
1922 if ((*it)->size() == 3) {
1923 const unsigned char *d = (*it)->const_data();
1924 if ((d[0] & 0xf0) == 0x90) { // note on
1925 v = .25f + d[2] / 512.f;
1927 else if ((d[0] & 0xf0) == 0x80) { // note off
1928 v = .3f - d[2] / 640.f;
1930 else if ((d[0] & 0xf0) == 0xb0) { // CC
1931 v = -.1f - d[2] / 256.f;
1938 float DummyAudioPort::grandf ()
1940 // Gaussian White Noise
1941 // http://www.musicdsp.org/archive.php?classid=0#109
1952 r = x1 * x1 + x2 * x2;
1953 } while ((r >= 1.0f) || (r < 1e-22f));
1955 r = sqrtf (-2.f * logf (r) / r);
1962 /* inspired by jack-demolition by Steve Harris */
1963 static const float _demolition[] = {
1964 0.0f, /* special case - 0dbFS white noise */
1965 0.0f, /* zero, may cause denomrals following a signal */
1966 0.73 / 1e45, /* very small - should be denormal when floated */
1967 3.7f, /* arbitrary number > 0dBFS */
1968 -4.3f, /* arbitrary negative number > 0dBFS */
1969 4294967395.0f, /* 2^16 + 100 */
1971 3.402823466e+38F, /* HUGE, HUGEVALF, non-inf number */
1972 INFINITY, /* +inf */
1973 -INFINITY, /* -inf */
1976 0.0f, /* some silence to check for recovery */
1979 void DummyAudioPort::generate (const pframes_t n_samples)
1981 Glib::Threads::Mutex::Lock lm (generator_lock);
1986 switch (_gen_type) {
1988 memset (_buffer, 0, n_samples * sizeof (Sample));
1991 for (pframes_t i = 0 ; i < n_samples; ++i) {
1996 switch (_gen_count2) {
1998 for (pframes_t i = 0 ; i < n_samples; ++i) {
1999 _buffer[i] = randf();
2003 for (pframes_t i = 0 ; i < n_samples; ++i) {
2004 _buffer[i] = _demolition [_gen_count2];
2008 _gen_offset += n_samples;
2009 if (_gen_offset > _gen_period) {
2011 _gen_count2 = (_gen_count2 + 1) % (sizeof (_demolition) / sizeof (float));
2015 assert(_gen_period > 0);
2016 for (pframes_t i = 0 ; i < n_samples; ++i) {
2017 if (_gen_offset < _gen_period * .5f) {
2018 _buffer[i] = .40709f; // -6dBFS
2020 _buffer[i] = -.40709f;
2022 _gen_offset = (_gen_offset + 1) % _gen_period;
2026 assert(_gen_period > 0);
2027 memset (_buffer, 0, n_samples * sizeof (Sample));
2028 for (pframes_t i = 0; i < n_samples; ++i) {
2029 if (_gen_offset == 0) {
2032 _gen_offset = (_gen_offset + 1) % _gen_period;
2035 case SineSweepSwell:
2036 case SquareSweepSwell:
2037 assert(_wavetable && _gen_period > 0);
2039 const float vols = 2.f / (float)_gen_perio2;
2040 for (pframes_t i = 0; i < n_samples; ++i) {
2041 const float g = fabsf (_gen_count2 * vols - 1.f);
2042 _buffer[i] = g * _wavetable[_gen_offset];
2043 _gen_offset = (_gen_offset + 1) % _gen_period;
2044 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
2049 memcpy((void*)_buffer, (void*)_wavetable, n_samples * sizeof(Sample));
2052 case SineWaveOctaves:
2055 assert(_wavetable && _gen_period > 0);
2057 pframes_t written = 0;
2058 while (written < n_samples) {
2059 const uint32_t remain = n_samples - written;
2060 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
2061 memcpy((void*)&_buffer[written],
2062 (void*)&_wavetable[_gen_offset],
2063 to_copy * sizeof(Sample));
2065 _gen_offset = (_gen_offset + to_copy) % _gen_period;
2069 case UniformWhiteNoise:
2070 for (pframes_t i = 0 ; i < n_samples; ++i) {
2071 _buffer[i] = .158489f * randf();
2074 case GaussianWhiteNoise:
2075 for (pframes_t i = 0 ; i < n_samples; ++i) {
2076 _buffer[i] = .089125f * grandf();
2080 for (pframes_t i = 0 ; i < n_samples; ++i) {
2081 // Paul Kellet's refined method
2082 // http://www.musicdsp.org/files/pink.txt
2083 // NB. If 'white' consists of uniform random numbers,
2084 // the pink noise will have an almost gaussian distribution.
2085 const float white = .0498f * randf ();
2086 _b0 = .99886f * _b0 + white * .0555179f;
2087 _b1 = .99332f * _b1 + white * .0750759f;
2088 _b2 = .96900f * _b2 + white * .1538520f;
2089 _b3 = .86650f * _b3 + white * .3104856f;
2090 _b4 = .55000f * _b4 + white * .5329522f;
2091 _b5 = -.7616f * _b5 - white * .0168980f;
2092 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
2093 _b6 = white * 0.115926f;
2097 for (pframes_t i = 0 ; i < n_samples; ++i) {
2098 const float white = 0.0498f * randf ();
2099 // Paul Kellet's economy method
2100 // http://www.musicdsp.org/files/pink.txt
2101 _b0 = 0.99765f * _b0 + white * 0.0990460f;
2102 _b1 = 0.96300f * _b1 + white * 0.2965164f;
2103 _b2 = 0.57000f * _b2 + white * 1.0526913f;
2104 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
2108 while (_ltcbuf->read_space () < n_samples) {
2109 // we should pre-allocate (or add a zero-copy libltc API), whatever.
2110 ltcsnd_sample_t* enc_buf = (ltcsnd_sample_t*) malloc (ltc_encoder_get_buffersize (_ltc) * sizeof (ltcsnd_sample_t));
2111 for (int byteCnt = 0; byteCnt < 10; byteCnt++) {
2112 if (_ltc_rand != 0.f) {
2113 _ltc_spd += randf () * _ltc_rand;
2114 _ltc_spd = std::min (1.5f, std::max (0.5f, _ltc_spd));
2116 ltc_encoder_encode_byte (_ltc, byteCnt, _ltc_spd);
2117 const int len = ltc_encoder_get_buffer (_ltc, enc_buf);
2118 for (int i = 0; i < len; ++i) {
2119 const float v1 = enc_buf[i] - 128;
2120 Sample v = v1 * 0.002;
2121 _ltcbuf->write (&v, 1);
2124 ltc_encoder_inc_timecode (_ltc);
2127 _ltcbuf->read (_buffer, n_samples);
2133 void* DummyAudioPort::get_buffer (pframes_t n_samples)
2136 const std::set<DummyPort *>& connections = get_connections ();
2137 std::set<DummyPort*>::const_iterator it = connections.begin ();
2138 if (it == connections.end ()) {
2139 memset (_buffer, 0, n_samples * sizeof (Sample));
2141 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
2142 assert (source && source->is_output ());
2143 if (source->is_physical() && source->is_terminal()) {
2144 source->get_buffer(n_samples); // generate signal.
2146 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
2147 while (++it != connections.end ()) {
2148 source = static_cast<DummyAudioPort*>(*it);
2149 assert (source && source->is_output ());
2150 Sample* dst = buffer ();
2151 if (source->is_physical() && source->is_terminal()) {
2152 source->get_buffer(n_samples); // generate signal.
2154 const Sample* src = source->const_buffer ();
2155 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
2160 } else if (is_output () && is_physical () && is_terminal()) {
2162 generate(n_samples);
2169 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
2170 : DummyPort (b, name, flags)
2172 , _midi_seq_time (0)
2179 DummyMidiPort::~DummyMidiPort () {
2184 struct MidiEventSorter {
2185 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
2190 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
2193 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2194 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2199 DummyMidiPort::setup_generator (int seq_id, const float sr)
2201 DummyPort::setup_random_number_generator();
2202 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
2203 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
2206 return DummyMidiData::sequence_names[seq_id];
2209 void DummyMidiPort::midi_generate (const pframes_t n_samples)
2211 Glib::Threads::Mutex::Lock lm (generator_lock);
2219 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
2220 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
2221 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2227 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
2228 if (ev_beat_time < 0) {
2231 if ((pframes_t) ev_beat_time >= n_samples) {
2234 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
2236 _midi_seq_dat[_midi_seq_pos].event,
2237 _midi_seq_dat[_midi_seq_pos].size
2241 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
2242 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
2246 _midi_seq_time += n_samples;
2250 void* DummyMidiPort::get_buffer (pframes_t n_samples)
2254 const std::set<DummyPort*>& connections = get_connections ();
2255 for (std::set<DummyPort*>::const_iterator i = connections.begin ();
2256 i != connections.end ();
2258 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
2259 if (source->is_physical() && source->is_terminal()) {
2260 source->get_buffer(n_samples); // generate signal.
2262 const DummyMidiBuffer *src = source->const_buffer ();
2263 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2264 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2267 std::stable_sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
2268 } else if (is_output () && is_physical () && is_terminal()) {
2270 midi_generate(n_samples);
2276 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2278 , _timestamp (timestamp)
2282 _data = (uint8_t*) malloc (size);
2283 memcpy (_data, data, size);
2287 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
2288 : _size (other.size ())
2289 , _timestamp (other.timestamp ())
2292 if (other.size () && other.const_data ()) {
2293 _data = (uint8_t*) malloc (other.size ());
2294 memcpy (_data, other.const_data (), other.size ());
2298 DummyMidiEvent::~DummyMidiEvent () {