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_property (PortHandle port, const std::string& key, std::string& value, std::string& type) const
684 if (!valid_port (port)) {
685 PBD::warning << _("DummyBackend::get_port_property: Invalid Port(s)") << endmsg;
688 if (key == "http://jackaudio.org/metadata/pretty-name") {
690 value = static_cast<DummyPort*>(port)->pretty_name ();
691 if (!value.empty()) {
699 DummyAudioBackend::set_port_property (PortHandle port, const std::string& key, const std::string& value, const std::string& type)
701 if (!valid_port (port)) {
702 PBD::warning << _("DummyBackend::set_port_property: Invalid Port(s)") << endmsg;
705 if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
706 static_cast<DummyPort*>(port)->set_pretty_name (value);
712 PortEngine::PortHandle
713 DummyAudioBackend::get_port_by_name (const std::string& name) const
715 PortHandle port = (PortHandle) find_port (name);
720 DummyAudioBackend::get_ports (
721 const std::string& port_name_pattern,
722 DataType type, PortFlags flags,
723 std::vector<std::string>& port_names) const
727 bool use_regexp = false;
728 if (port_name_pattern.size () > 0) {
729 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
734 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
735 DummyPort* port = *i;
736 if ((port->type () == type) && flags == (port->flags () & flags)) {
737 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
738 port_names.push_back (port->name ());
744 regfree (&port_regex);
750 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
752 if (!valid_port (port)) {
753 return DataType::NIL;
755 return static_cast<DummyPort*>(port)->type ();
758 PortEngine::PortHandle
759 DummyAudioBackend::register_port (
760 const std::string& name,
761 ARDOUR::DataType type,
762 ARDOUR::PortFlags flags)
764 if (name.size () == 0) { return 0; }
765 if (flags & IsPhysical) { return 0; }
767 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
769 return add_port (_instance_name + ":" + name, type, flags);
772 PortEngine::PortHandle
773 DummyAudioBackend::add_port (
774 const std::string& name,
775 ARDOUR::DataType type,
776 ARDOUR::PortFlags flags)
778 assert(name.size ());
779 if (find_port (name)) {
780 PBD::error << _("DummyBackend::register_port: Port already exists:")
781 << " (" << name << ")" << endmsg;
784 DummyPort* port = NULL;
786 case DataType::AUDIO:
787 port = new DummyAudioPort (*this, name, flags);
790 port = new DummyMidiPort (*this, name, flags);
793 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
797 _ports.insert (port);
798 _portmap.insert (make_pair (name, port));
804 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
807 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
808 assert (!valid_port (port_handle));
811 DummyPort* port = static_cast<DummyPort*>(port_handle);
812 PortIndex::iterator i = std::find (_ports.begin(), _ports.end(), static_cast<DummyPort*>(port_handle));
813 if (i == _ports.end ()) {
814 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
817 disconnect_all(port_handle);
818 _portmap.erase (port->name());
824 DummyAudioBackend::register_system_ports()
827 enum DummyAudioPort::GeneratorType gt;
828 if (_device == _("Uniform White Noise")) {
829 gt = DummyAudioPort::UniformWhiteNoise;
830 } else if (_device == _("Gaussian White Noise")) {
831 gt = DummyAudioPort::GaussianWhiteNoise;
832 } else if (_device == _("Pink Noise")) {
833 gt = DummyAudioPort::PinkNoise;
834 } else if (_device == _("Pink Noise (low CPU)")) {
835 gt = DummyAudioPort::PonyNoise;
836 } else if (_device == _("Sine Wave")) {
837 gt = DummyAudioPort::SineWave;
838 } else if (_device == _("Sine Wave 1K, 1/3 Oct")) {
839 gt = DummyAudioPort::SineWaveOctaves;
840 } else if (_device == _("Square Wave")) {
841 gt = DummyAudioPort::SquareWave;
842 } else if (_device == _("Impulses")) {
843 gt = DummyAudioPort::KronekerDelta;
844 } else if (_device == _("Sine Sweep")) {
845 gt = DummyAudioPort::SineSweep;
846 } else if (_device == _("Sine Sweep Swell")) {
847 gt = DummyAudioPort::SineSweepSwell;
848 } else if (_device == _("Square Sweep")) {
849 gt = DummyAudioPort::SquareSweep;
850 } else if (_device == _("Square Sweep Swell")) {
851 gt = DummyAudioPort::SquareSweepSwell;
852 } else if (_device == _("LTC")) {
853 gt = DummyAudioPort::LTC;
854 } else if (_device == _("Loopback")) {
855 gt = DummyAudioPort::Loopback;
856 } else if (_device == _("Demolition")) {
857 gt = DummyAudioPort::Demolition;
858 } else if (_device == _("DC -6dBFS (+.5)")) {
859 gt = DummyAudioPort::DC05;
861 gt = DummyAudioPort::Silence;
864 if (_midi_mode == MidiToAudio) {
865 gt = DummyAudioPort::Loopback;
868 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
869 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
870 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
871 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
875 lr.min = lr.max = _systemic_input_latency;
876 for (int i = 1; i <= a_ins; ++i) {
878 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
879 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
881 set_latency_range (p, false, lr);
882 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
883 std::string name = static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate, i - 1, a_ins);
884 if (!name.empty ()) {
885 static_cast<DummyAudioPort*>(p)->set_pretty_name (name);
889 lr.min = lr.max = _systemic_output_latency;
890 for (int i = 1; i <= a_out; ++i) {
892 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
893 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
895 set_latency_range (p, true, lr);
896 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
900 lr.min = lr.max = _systemic_input_latency;
901 for (int i = 0; i < m_ins; ++i) {
903 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
904 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
906 set_latency_range (p, false, lr);
907 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
908 if (_midi_mode == MidiGenerator) {
909 std::string name = static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
910 if (!name.empty ()) {
911 static_cast<DummyMidiPort*>(p)->set_pretty_name (name);
916 lr.min = lr.max = _systemic_output_latency;
917 for (int i = 1; i <= m_out; ++i) {
919 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
920 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
922 set_latency_range (p, true, lr);
923 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
925 if (_device == _("Loopback") && _midi_mode == MidiToAudio) {
926 std::stringstream ss;
928 for (int apc = 0; apc < (int)_system_inputs.size(); ++apc) {
929 if ((apc % m_out) + 1 == i) {
930 ss << " >" << (apc + 1);
933 static_cast<DummyMidiPort*>(p)->set_pretty_name (ss.str());
940 DummyAudioBackend::unregister_ports (bool system_only)
942 _system_inputs.clear();
943 _system_outputs.clear();
944 _system_midi_in.clear();
945 _system_midi_out.clear();
947 for (PortIndex::iterator i = _ports.begin (); i != _ports.end ();) {
948 PortIndex::iterator cur = i++;
949 DummyPort* port = *cur;
950 if (! system_only || (port->is_physical () && port->is_terminal ())) {
951 port->disconnect_all ();
952 _portmap.erase (port->name());
960 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
962 DummyPort* src_port = find_port (src);
963 DummyPort* dst_port = find_port (dst);
966 PBD::error << _("DummyBackend::connect: Invalid Source port:")
967 << " (" << src <<")" << endmsg;
971 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
972 << " (" << dst <<")" << endmsg;
975 return src_port->connect (dst_port);
979 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
981 DummyPort* src_port = find_port (src);
982 DummyPort* dst_port = find_port (dst);
984 if (!src_port || !dst_port) {
985 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
988 return src_port->disconnect (dst_port);
992 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
994 DummyPort* dst_port = find_port (dst);
995 if (!valid_port (src)) {
996 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
1000 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
1001 << " (" << dst << ")" << endmsg;
1004 return static_cast<DummyPort*>(src)->connect (dst_port);
1008 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1010 DummyPort* dst_port = find_port (dst);
1011 if (!valid_port (src) || !dst_port) {
1012 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
1015 return static_cast<DummyPort*>(src)->disconnect (dst_port);
1019 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
1021 if (!valid_port (port)) {
1022 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1025 static_cast<DummyPort*>(port)->disconnect_all ();
1030 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1032 if (!valid_port (port)) {
1033 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1036 return static_cast<DummyPort*>(port)->is_connected ();
1040 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1042 DummyPort* dst_port = find_port (dst);
1044 if (!valid_port (src) || !dst_port) {
1045 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
1049 return static_cast<DummyPort*>(src)->is_connected (dst_port);
1053 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1055 if (!valid_port (port)) {
1056 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
1059 return static_cast<DummyPort*>(port)->is_physically_connected ();
1063 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1065 if (!valid_port (port)) {
1066 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
1070 assert (0 == names.size ());
1072 const std::set<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
1074 for (std::set<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1075 names.push_back ((*i)->name ());
1078 return (int)names.size ();
1083 DummyAudioBackend::midi_event_get (
1084 pframes_t& timestamp,
1085 size_t& size, uint8_t const** buf, void* port_buffer,
1086 uint32_t event_index)
1088 assert (buf && port_buffer);
1089 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
1090 if (event_index >= source.size ()) {
1093 DummyMidiEvent * const event = source[event_index].get ();
1095 timestamp = event->timestamp ();
1096 size = event->size ();
1097 *buf = event->data ();
1102 DummyAudioBackend::midi_event_put (
1104 pframes_t timestamp,
1105 const uint8_t* buffer, size_t size)
1107 assert (buffer && port_buffer);
1108 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
1109 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1110 // nevermind, ::get_buffer() sorts events, but always print warning
1111 fprintf (stderr, "DummyMidiBuffer: it's too late for this event %d > %d.\n", (pframes_t)dst.back ()->timestamp (), timestamp);
1113 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
1114 #if 0 // DEBUG MIDI EVENTS
1115 printf("DummyAudioBackend::midi_event_put %d, %zu: ", timestamp, size);
1116 for (size_t xx = 0; xx < size; ++xx) {
1117 printf(" %02x", buffer[xx]);
1125 DummyAudioBackend::get_midi_event_count (void* port_buffer)
1127 assert (port_buffer);
1128 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1132 DummyAudioBackend::midi_clear (void* port_buffer)
1134 assert (port_buffer);
1135 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1143 DummyAudioBackend::can_monitor_input () const
1149 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1155 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1161 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1166 /* Latency management */
1169 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1171 if (!valid_port (port)) {
1172 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1174 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1178 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1181 if (!valid_port (port)) {
1182 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1187 DummyPort *p = static_cast<DummyPort*>(port);
1190 r = p->latency_range (for_playback);
1191 if (p->is_physical() && p->is_terminal()) {
1192 if (p->is_input() && for_playback) {
1193 const size_t l_in = _samples_per_period * .25;
1197 if (p->is_output() && !for_playback) {
1198 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1199 const size_t l_in = _samples_per_period * .25;
1200 const size_t l_out = _samples_per_period - l_in;
1208 /* Discovering physical ports */
1211 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1213 if (!valid_port (port)) {
1214 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1217 return static_cast<DummyPort*>(port)->is_physical ();
1221 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1223 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1224 DummyPort* port = *i;
1225 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1226 port_names.push_back (port->name ());
1232 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1234 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1235 DummyPort* port = *i;
1236 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1237 port_names.push_back (port->name ());
1243 DummyAudioBackend::n_physical_outputs () const
1247 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
1248 DummyPort* port = *i;
1249 if (port->is_output () && port->is_physical ()) {
1250 switch (port->type ()) {
1251 case DataType::AUDIO: ++n_audio; break;
1252 case DataType::MIDI: ++n_midi; break;
1258 cc.set (DataType::AUDIO, n_audio);
1259 cc.set (DataType::MIDI, n_midi);
1264 DummyAudioBackend::n_physical_inputs () const
1268 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
1269 DummyPort* port = *i;
1270 if (port->is_input () && port->is_physical ()) {
1271 switch (port->type ()) {
1272 case DataType::AUDIO: ++n_audio; break;
1273 case DataType::MIDI: ++n_midi; break;
1279 cc.set (DataType::AUDIO, n_audio);
1280 cc.set (DataType::MIDI, n_midi);
1284 /* Getting access to the data buffer for a port */
1287 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1290 assert (valid_port (port));
1291 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1294 /* Engine Process */
1296 DummyAudioBackend::main_process_thread ()
1298 AudioEngine::thread_init_callback (this);
1300 _processed_samples = 0;
1302 manager.registration_callback();
1303 manager.graph_order_callback();
1308 const size_t samples_per_period = _samples_per_period;
1310 if (_freewheeling != _freewheel) {
1311 _freewheel = _freewheeling;
1312 engine.freewheel_callback (_freewheel);
1315 // re-set input buffers, generate on demand.
1316 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1317 (*it)->next_period();
1319 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1320 (*it)->next_period();
1323 if (engine.process_callback (samples_per_period)) {
1326 _processed_samples += samples_per_period;
1328 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1330 int opc = _system_outputs.size();
1331 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1332 DummyAudioPort* op = _system_outputs[(opn % opc)];
1333 (*it)->fill_wavetable ((const float*)op->get_buffer (samples_per_period), samples_per_period);
1337 if (_midi_mode == MidiLoopback) {
1339 int opc = _system_midi_out.size();
1340 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1341 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1342 op->get_buffer(0); // mix-down
1343 (*it)->set_loopback (op->const_buffer());
1346 else if (_midi_mode == MidiToAudio) {
1348 int opc = _system_midi_out.size();
1349 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1350 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1351 op->get_buffer(0); // mix-down
1352 (*it)->midi_to_wavetable (op->const_buffer(), samples_per_period);
1357 _dsp_load_calc.set_max_time (_samplerate, samples_per_period);
1358 _dsp_load_calc.set_start_timestamp_us (clock1);
1359 _dsp_load_calc.set_stop_timestamp_us (_x_get_monotonic_usec());
1360 _dsp_load = _dsp_load_calc.get_dsp_load_unbound ();
1362 const int64_t elapsed_time = _dsp_load_calc.elapsed_time_us ();
1363 const int64_t nominal_time = _dsp_load_calc.get_max_time_us ();
1364 if (elapsed_time < nominal_time) {
1365 const int64_t sleepy = _speedup * (nominal_time - elapsed_time);
1366 Glib::usleep (std::max ((int64_t) 100, sleepy));
1368 Glib::usleep (100); // don't hog cpu
1372 Glib::usleep (100); // don't hog cpu
1375 /* beginning of next cycle */
1376 clock1 = _x_get_monotonic_usec();
1378 bool connections_changed = false;
1379 bool ports_changed = false;
1380 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1381 if (_port_change_flag) {
1382 ports_changed = true;
1383 _port_change_flag = false;
1385 if (!_port_connection_queue.empty ()) {
1386 connections_changed = true;
1388 while (!_port_connection_queue.empty ()) {
1389 PortConnectData *c = _port_connection_queue.back ();
1390 manager.connect_callback (c->a, c->b, c->c);
1391 _port_connection_queue.pop_back ();
1394 pthread_mutex_unlock (&_port_callback_mutex);
1396 if (ports_changed) {
1397 manager.registration_callback();
1399 if (connections_changed) {
1400 manager.graph_order_callback();
1402 if (connections_changed || ports_changed) {
1403 engine.latency_callback(false);
1404 engine.latency_callback(true);
1413 /******************************************************************************/
1415 static boost::shared_ptr<DummyAudioBackend> _instance;
1417 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1418 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1419 static int deinstantiate ();
1420 static bool already_configured ();
1421 static bool available ();
1423 static ARDOUR::AudioBackendInfo _descriptor = {
1432 static boost::shared_ptr<AudioBackend>
1433 backend_factory (AudioEngine& e)
1436 _instance.reset (new DummyAudioBackend (e, _descriptor));
1442 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1444 s_instance_name = arg1;
1456 already_configured ()
1458 // special-case: unit-tests require backend to be pre-configured.
1459 if (s_instance_name == "Unit-Test") {
1471 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1473 return &_descriptor;
1477 /******************************************************************************/
1478 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1479 : _dummy_backend (b)
1483 , _gen_cycle (false)
1485 _capture_latency_range.min = 0;
1486 _capture_latency_range.max = 0;
1487 _playback_latency_range.min = 0;
1488 _playback_latency_range.max = 0;
1489 _dummy_backend.port_connect_add_remove_callback();
1492 DummyPort::~DummyPort () {
1494 _dummy_backend.port_connect_add_remove_callback();
1498 int DummyPort::connect (DummyPort *port)
1501 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1505 if (type () != port->type ()) {
1506 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1510 if (is_output () && port->is_output ()) {
1511 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1515 if (is_input () && port->is_input ()) {
1516 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1521 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1525 if (is_connected (port)) {
1526 #if 0 // don't bother to warn about this for now. just ignore it
1527 PBD::error << _("DummyPort::connect (): ports are already connected:")
1528 << " (" << name () << ") -> (" << port->name () << ")"
1534 _connect (port, true);
1539 void DummyPort::_connect (DummyPort *port, bool callback)
1541 _connections.insert (port);
1543 port->_connect (this, false);
1544 _dummy_backend.port_connect_callback (name(), port->name(), true);
1548 int DummyPort::disconnect (DummyPort *port)
1551 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1555 if (!is_connected (port)) {
1556 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1557 << " (" << name () << ") -> (" << port->name () << ")"
1561 _disconnect (port, true);
1565 void DummyPort::_disconnect (DummyPort *port, bool callback)
1567 std::set<DummyPort*>::iterator it = _connections.find (port);
1568 assert (it != _connections.end ());
1569 _connections.erase (it);
1571 port->_disconnect (this, false);
1572 _dummy_backend.port_connect_callback (name(), port->name(), false);
1577 void DummyPort::disconnect_all ()
1579 while (!_connections.empty ()) {
1580 std::set<DummyPort*>::iterator it = _connections.begin ();
1581 (*it)->_disconnect (this, false);
1582 _dummy_backend.port_connect_callback (name(), (*it)->name(), false);
1583 _connections.erase (it);
1588 DummyPort::is_connected (const DummyPort *port) const
1590 return _connections.find (const_cast<DummyPort *>(port)) != _connections.end ();
1593 bool DummyPort::is_physically_connected () const
1595 for (std::set<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1596 if ((*it)->is_physical ()) {
1603 void DummyPort::setup_random_number_generator ()
1605 #ifdef PLATFORM_WINDOWS
1606 LARGE_INTEGER Count;
1607 if (QueryPerformanceCounter (&Count)) {
1608 _rseed = Count.QuadPart % UINT_MAX;
1612 _rseed = g_get_monotonic_time() % UINT_MAX;
1614 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1615 if (_rseed == 0) _rseed = 1;
1621 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1622 // http://www.firstpr.com.au/dsp/rand31/
1624 lo = 16807 * (_rseed & 0xffff);
1625 hi = 16807 * (_rseed >> 16);
1627 lo += (hi & 0x7fff) << 16;
1630 lo = (lo & 0x7fffffff) + (lo >> 31);
1632 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1634 return (_rseed = lo);
1640 return (randi() / 1073741824.f) - 1.f;
1643 /******************************************************************************/
1645 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1646 : DummyPort (b, name, flags)
1647 , _gen_type (Silence)
1665 memset (_buffer, 0, sizeof (_buffer));
1668 DummyAudioPort::~DummyAudioPort () {
1670 ltc_encoder_free (_ltc);
1677 static std::string format_hz (float freq) {
1678 std::stringstream ss;
1679 if (freq >= 10000) {
1680 ss << std::setprecision (1) << std::fixed << freq / 1000 << "kHz";
1681 } else if (freq >= 1000) {
1682 ss << std::setprecision (2) << std::fixed << freq / 1000 << "kHz";
1684 ss << std::setprecision (1) << std::fixed << freq << "Hz";
1689 static size_t fit_wave (float freq, float rate, float precision = 0.001) {
1690 const size_t max_mult = floor (freq * rate);
1693 for (size_t i = 1; i < max_mult; ++i) {
1694 const float isc = rate * (float)i / freq; // ideal sample count
1695 const float rsc = rintf (isc); // rounded sample count
1696 const float err = fabsf (isc - rsc);
1701 if (err < precision) {
1705 //printf(" FIT %8.1f Hz / %8.1f Hz * %ld = %.0f (err: %e)\n", freq, rate, fact, fact * rate / freq, minErr);
1710 DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate, int c, int total)
1713 DummyPort::setup_random_number_generator();
1716 switch (_gen_type) {
1719 case UniformWhiteNoise:
1720 case GaussianWhiteNoise:
1725 _gen_period = 3 * samplerate;
1728 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1729 name = "Delta " + format_hz (samplerate / _gen_period);
1732 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1733 name = "Square " + format_hz (samplerate / _gen_period);
1735 case SineWaveOctaves:
1737 const int x = c - floor (((float)total / 2));
1738 float f = powf (2.f, x / 3.f) * 1000.f;
1739 f = std::max (10.f, std::min (samplerate *.5f, f));
1740 const size_t mult = fit_wave (f, samplerate);
1741 _gen_period = rintf ((float)mult * samplerate / f);
1742 name = "Sine " + format_hz (samplerate * mult / (float)_gen_period);
1743 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1744 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1745 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)mult * (float)i / (float)(_gen_period)); // -18dBFS
1750 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1751 name = "Sine " + format_hz (samplerate / _gen_period);
1752 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1753 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1754 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1758 case SquareSweepSwell:
1760 case SineSweepSwell:
1762 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1764 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1765 const double f_min = 20.;
1766 const double f_max = samplerate * .5;
1767 const double g_p2 = _gen_period * .5;
1769 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1770 const double a = f_min / samplerate;
1772 const double b = log (f_max / f_min) / g_p2;
1773 const double a = f_min / (b * samplerate);
1775 const uint32_t g_p2i = rint(g_p2);
1776 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1777 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1779 const double phase = i * (a + b * i);
1781 const double phase = a * exp (b * i) - a;
1783 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1785 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1786 const uint32_t j = _gen_period - i;
1788 const double phase = j * (a + b * j);
1790 const double phase = a * exp (b * j) - a;
1792 _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
1794 if (_gen_type == SquareSweep) {
1795 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1796 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1799 else if (_gen_type == SquareSweepSwell) {
1800 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1801 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1809 _ltc = ltc_encoder_create (samplerate, 25, LTC_TV_625_50, 0);
1813 _ltc = ltc_encoder_create (samplerate, 30, LTC_TV_1125_60, 0);
1817 _ltc = ltc_encoder_create (samplerate, 30001.f / 1001.f, LTC_TV_525_60, 0);
1821 _ltc = ltc_encoder_create (samplerate, 24, LTC_TV_FILM_24, 0);
1826 _ltc_rand = floor((float)c / 4) * .001f;
1828 name += " (locked)";
1830 name += " (varspd)";
1836 tc.hours = (3 * (c / 4)) % 24; // XXX
1840 ltc_encoder_set_timecode (_ltc, &tc);
1841 name += string_compose ("@%1h", (int)tc.hours);
1842 _ltcbuf = new RingBuffer<Sample> (std::max (DummyAudioBackend::max_buffer_size() * 2.f, samplerate));
1845 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1851 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1853 memset(_wavetable, 0, n_samples * sizeof(float));
1854 /* generate an audio spike for every midi message
1855 * to verify layency-compensation alignment
1856 * (here: midi-out playback-latency + audio-in capture-latency)
1858 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1859 const pframes_t t = (*it)->timestamp();
1860 assert(t < n_samples);
1861 // somewhat arbitrary mapping for quick visual feedback
1863 if ((*it)->size() == 3) {
1864 const unsigned char *d = (*it)->const_data();
1865 if ((d[0] & 0xf0) == 0x90) { // note on
1866 v = .25f + d[2] / 512.f;
1868 else if ((d[0] & 0xf0) == 0x80) { // note off
1869 v = .3f - d[2] / 640.f;
1871 else if ((d[0] & 0xf0) == 0xb0) { // CC
1872 v = -.1f - d[2] / 256.f;
1879 float DummyAudioPort::grandf ()
1881 // Gaussian White Noise
1882 // http://www.musicdsp.org/archive.php?classid=0#109
1893 r = x1 * x1 + x2 * x2;
1894 } while ((r >= 1.0f) || (r < 1e-22f));
1896 r = sqrtf (-2.f * logf (r) / r);
1903 /* inspired by jack-demolition by Steve Harris */
1904 static const float _demolition[] = {
1905 0.0f, /* special case - 0dbFS white noise */
1906 0.0f, /* zero, may cause denomrals following a signal */
1907 0.73 / 1e45, /* very small - should be denormal when floated */
1908 3.7f, /* arbitrary number > 0dBFS */
1909 -4.3f, /* arbitrary negative number > 0dBFS */
1910 4294967395.0f, /* 2^16 + 100 */
1912 3.402823466e+38F, /* HUGE, HUGEVALF, non-inf number */
1913 INFINITY, /* +inf */
1914 -INFINITY, /* -inf */
1917 0.0f, /* some silence to check for recovery */
1920 void DummyAudioPort::generate (const pframes_t n_samples)
1922 Glib::Threads::Mutex::Lock lm (generator_lock);
1927 switch (_gen_type) {
1929 memset (_buffer, 0, n_samples * sizeof (Sample));
1932 for (pframes_t i = 0 ; i < n_samples; ++i) {
1937 switch (_gen_count2) {
1939 for (pframes_t i = 0 ; i < n_samples; ++i) {
1940 _buffer[i] = randf();
1944 for (pframes_t i = 0 ; i < n_samples; ++i) {
1945 _buffer[i] = _demolition [_gen_count2];
1949 _gen_offset += n_samples;
1950 if (_gen_offset > _gen_period) {
1952 _gen_count2 = (_gen_count2 + 1) % (sizeof (_demolition) / sizeof (float));
1956 assert(_gen_period > 0);
1957 for (pframes_t i = 0 ; i < n_samples; ++i) {
1958 if (_gen_offset < _gen_period * .5f) {
1959 _buffer[i] = .40709f; // -6dBFS
1961 _buffer[i] = -.40709f;
1963 _gen_offset = (_gen_offset + 1) % _gen_period;
1967 assert(_gen_period > 0);
1968 memset (_buffer, 0, n_samples * sizeof (Sample));
1969 for (pframes_t i = 0; i < n_samples; ++i) {
1970 if (_gen_offset == 0) {
1973 _gen_offset = (_gen_offset + 1) % _gen_period;
1976 case SineSweepSwell:
1977 case SquareSweepSwell:
1978 assert(_wavetable && _gen_period > 0);
1980 const float vols = 2.f / (float)_gen_perio2;
1981 for (pframes_t i = 0; i < n_samples; ++i) {
1982 const float g = fabsf (_gen_count2 * vols - 1.f);
1983 _buffer[i] = g * _wavetable[_gen_offset];
1984 _gen_offset = (_gen_offset + 1) % _gen_period;
1985 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1990 memcpy((void*)_buffer, (void*)_wavetable, n_samples * sizeof(Sample));
1993 case SineWaveOctaves:
1996 assert(_wavetable && _gen_period > 0);
1998 pframes_t written = 0;
1999 while (written < n_samples) {
2000 const uint32_t remain = n_samples - written;
2001 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
2002 memcpy((void*)&_buffer[written],
2003 (void*)&_wavetable[_gen_offset],
2004 to_copy * sizeof(Sample));
2006 _gen_offset = (_gen_offset + to_copy) % _gen_period;
2010 case UniformWhiteNoise:
2011 for (pframes_t i = 0 ; i < n_samples; ++i) {
2012 _buffer[i] = .158489f * randf();
2015 case GaussianWhiteNoise:
2016 for (pframes_t i = 0 ; i < n_samples; ++i) {
2017 _buffer[i] = .089125f * grandf();
2021 for (pframes_t i = 0 ; i < n_samples; ++i) {
2022 // Paul Kellet's refined method
2023 // http://www.musicdsp.org/files/pink.txt
2024 // NB. If 'white' consists of uniform random numbers,
2025 // the pink noise will have an almost gaussian distribution.
2026 const float white = .0498f * randf ();
2027 _b0 = .99886f * _b0 + white * .0555179f;
2028 _b1 = .99332f * _b1 + white * .0750759f;
2029 _b2 = .96900f * _b2 + white * .1538520f;
2030 _b3 = .86650f * _b3 + white * .3104856f;
2031 _b4 = .55000f * _b4 + white * .5329522f;
2032 _b5 = -.7616f * _b5 - white * .0168980f;
2033 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
2034 _b6 = white * 0.115926f;
2038 for (pframes_t i = 0 ; i < n_samples; ++i) {
2039 const float white = 0.0498f * randf ();
2040 // Paul Kellet's economy method
2041 // http://www.musicdsp.org/files/pink.txt
2042 _b0 = 0.99765f * _b0 + white * 0.0990460f;
2043 _b1 = 0.96300f * _b1 + white * 0.2965164f;
2044 _b2 = 0.57000f * _b2 + white * 1.0526913f;
2045 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
2049 while (_ltcbuf->read_space () < n_samples) {
2050 // we should pre-allocate (or add a zero-copy libltc API), whatever.
2051 ltcsnd_sample_t* enc_buf = (ltcsnd_sample_t*) malloc (ltc_encoder_get_buffersize (_ltc) * sizeof (ltcsnd_sample_t));
2052 for (int byteCnt = 0; byteCnt < 10; byteCnt++) {
2053 if (_ltc_rand != 0.f) {
2054 _ltc_spd += randf () * _ltc_rand;
2055 _ltc_spd = std::min (1.5f, std::max (0.5f, _ltc_spd));
2057 ltc_encoder_encode_byte (_ltc, byteCnt, _ltc_spd);
2058 const int len = ltc_encoder_get_buffer (_ltc, enc_buf);
2059 for (int i = 0; i < len; ++i) {
2060 const float v1 = enc_buf[i] - 128;
2061 Sample v = v1 * 0.002;
2062 _ltcbuf->write (&v, 1);
2065 ltc_encoder_inc_timecode (_ltc);
2068 _ltcbuf->read (_buffer, n_samples);
2074 void* DummyAudioPort::get_buffer (pframes_t n_samples)
2077 const std::set<DummyPort *>& connections = get_connections ();
2078 std::set<DummyPort*>::const_iterator it = connections.begin ();
2079 if (it == connections.end ()) {
2080 memset (_buffer, 0, n_samples * sizeof (Sample));
2082 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
2083 assert (source && source->is_output ());
2084 if (source->is_physical() && source->is_terminal()) {
2085 source->get_buffer(n_samples); // generate signal.
2087 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
2088 while (++it != connections.end ()) {
2089 source = static_cast<DummyAudioPort*>(*it);
2090 assert (source && source->is_output ());
2091 Sample* dst = buffer ();
2092 if (source->is_physical() && source->is_terminal()) {
2093 source->get_buffer(n_samples); // generate signal.
2095 const Sample* src = source->const_buffer ();
2096 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
2101 } else if (is_output () && is_physical () && is_terminal()) {
2103 generate(n_samples);
2110 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
2111 : DummyPort (b, name, flags)
2113 , _midi_seq_time (0)
2120 DummyMidiPort::~DummyMidiPort () {
2125 struct MidiEventSorter {
2126 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
2131 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
2134 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2135 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2140 DummyMidiPort::setup_generator (int seq_id, const float sr)
2142 DummyPort::setup_random_number_generator();
2143 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
2144 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
2147 return DummyMidiData::sequence_names[seq_id];
2150 void DummyMidiPort::midi_generate (const pframes_t n_samples)
2152 Glib::Threads::Mutex::Lock lm (generator_lock);
2160 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
2161 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
2162 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2168 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
2169 if (ev_beat_time < 0) {
2172 if ((pframes_t) ev_beat_time >= n_samples) {
2175 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
2177 _midi_seq_dat[_midi_seq_pos].event,
2178 _midi_seq_dat[_midi_seq_pos].size
2182 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
2183 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
2187 _midi_seq_time += n_samples;
2191 void* DummyMidiPort::get_buffer (pframes_t n_samples)
2195 const std::set<DummyPort*>& connections = get_connections ();
2196 for (std::set<DummyPort*>::const_iterator i = connections.begin ();
2197 i != connections.end ();
2199 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
2200 if (source->is_physical() && source->is_terminal()) {
2201 source->get_buffer(n_samples); // generate signal.
2203 const DummyMidiBuffer *src = source->const_buffer ();
2204 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2205 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2208 std::stable_sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
2209 } else if (is_output () && is_physical () && is_terminal()) {
2211 midi_generate(n_samples);
2217 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2219 , _timestamp (timestamp)
2223 _data = (uint8_t*) malloc (size);
2224 memcpy (_data, data, size);
2228 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
2229 : _size (other.size ())
2230 , _timestamp (other.timestamp ())
2233 if (other.size () && other.const_data ()) {
2234 _data = (uint8_t*) malloc (other.size ());
2235 memcpy (_data, other.const_data (), other.size ());
2239 DummyMidiEvent::~DummyMidiEvent () {