2 * Copyright (C) 2014 Robin Gareus <robin@gareus.org>
3 * Copyright (C) 2013 Paul Davis
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #ifdef PLATFORM_WINDOWS
28 #include <pbd/windows_timer_utils.h>
31 #include "dummy_audiobackend.h"
32 #include "dummy_midi_seq.h"
34 #include "pbd/error.h"
35 #include "ardour/port_manager.h"
38 using namespace ARDOUR;
40 static std::string s_instance_name;
41 size_t DummyAudioBackend::_max_buffer_size = 8192;
42 std::vector<std::string> DummyAudioBackend::_midi_options;
43 std::vector<AudioBackend::DeviceStatus> DummyAudioBackend::_device_status;
45 std::vector<DummyAudioBackend::DriverSpeed> DummyAudioBackend::_driver_speed;
47 static int64_t _x_get_monotonic_usec() {
48 #ifdef PLATFORM_WINDOWS
49 return PBD::get_microseconds();
51 return g_get_monotonic_time();
54 DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
55 : AudioBackend (e, info)
58 , _freewheeling (false)
62 , _samples_per_period (1024)
68 , _midi_mode (MidiNoEvents)
69 , _systemic_input_latency (0)
70 , _systemic_output_latency (0)
71 , _processed_samples (0)
72 , _port_change_flag (false)
74 _instance_name = s_instance_name;
75 _device = _("Silence");
76 pthread_mutex_init (&_port_callback_mutex, 0);
78 if (_driver_speed.empty()) {
79 _driver_speed.push_back (DriverSpeed (_("Half Speed"), 2.0f));
80 _driver_speed.push_back (DriverSpeed (_("Normal Speed"), 1.0f));
81 _driver_speed.push_back (DriverSpeed (_("Double Speed"), 0.5f));
82 _driver_speed.push_back (DriverSpeed (_("5x Speed"), 0.2f));
83 _driver_speed.push_back (DriverSpeed (_("10x Speed"), 0.1f));
84 _driver_speed.push_back (DriverSpeed (_("15x Speed"), 0.06666f));
85 _driver_speed.push_back (DriverSpeed (_("20x Speed"), 0.05f));
86 _driver_speed.push_back (DriverSpeed (_("50x Speed"), 0.02f));
91 DummyAudioBackend::~DummyAudioBackend ()
93 pthread_mutex_destroy (&_port_callback_mutex);
96 /* AUDIOBACKEND API */
99 DummyAudioBackend::name () const
101 return X_("Dummy"); // internal name
105 DummyAudioBackend::is_realtime () const
110 std::vector<AudioBackend::DeviceStatus>
111 DummyAudioBackend::enumerate_devices () const
113 if (_device_status.empty()) {
114 _device_status.push_back (DeviceStatus (_("Silence"), true));
115 _device_status.push_back (DeviceStatus (_("DC -6dBFS (+.5)"), true));
116 _device_status.push_back (DeviceStatus (_("Demolition"), true));
117 _device_status.push_back (DeviceStatus (_("Sine Wave"), true));
118 _device_status.push_back (DeviceStatus (_("Square Wave"), true));
119 _device_status.push_back (DeviceStatus (_("Impulses"), true));
120 _device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
121 _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
122 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
123 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
124 _device_status.push_back (DeviceStatus (_("Sine Sweep"), true));
125 _device_status.push_back (DeviceStatus (_("Sine Sweep Swell"), true));
126 _device_status.push_back (DeviceStatus (_("Square Sweep"), true));
127 _device_status.push_back (DeviceStatus (_("Square Sweep Swell"), true));
128 _device_status.push_back (DeviceStatus (_("Loopback"), true));
130 return _device_status;
134 DummyAudioBackend::available_sample_rates (const std::string&) const
136 std::vector<float> sr;
137 sr.push_back (8000.0);
138 sr.push_back (22050.0);
139 sr.push_back (24000.0);
140 sr.push_back (44100.0);
141 sr.push_back (48000.0);
142 sr.push_back (88200.0);
143 sr.push_back (96000.0);
144 sr.push_back (176400.0);
145 sr.push_back (192000.0);
149 std::vector<uint32_t>
150 DummyAudioBackend::available_buffer_sizes (const std::string&) const
152 std::vector<uint32_t> bs;
169 DummyAudioBackend::available_input_channel_count (const std::string&) const
175 DummyAudioBackend::available_output_channel_count (const std::string&) const
181 DummyAudioBackend::can_change_sample_rate_when_running () const
187 DummyAudioBackend::can_change_buffer_size_when_running () const
192 std::vector<std::string>
193 DummyAudioBackend::enumerate_drivers () const
195 std::vector<std::string> speed_drivers;
196 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
197 speed_drivers.push_back (it->name);
199 return speed_drivers;
203 DummyAudioBackend::driver_name () const
205 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
206 if (rintf (1e6f * _speedup) == rintf (1e6f * it->speedup)) {
211 return _("Normal Speed");
215 DummyAudioBackend::set_driver (const std::string& d)
217 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
219 _speedup = it->speedup;
228 DummyAudioBackend::set_device_name (const std::string& d)
235 DummyAudioBackend::set_sample_rate (float sr)
237 if (sr <= 0) { return -1; }
239 engine.sample_rate_change (sr);
244 DummyAudioBackend::set_buffer_size (uint32_t bs)
246 if (bs <= 0 || bs > _max_buffer_size) {
249 _samples_per_period = bs;
251 /* update port latencies
252 * with 'Loopback' there is exactly once cycle latency,
253 * divide it between In + Out;
256 lr.min = lr.max = _systemic_input_latency;
257 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
258 set_latency_range (*it, false, lr);
260 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
261 set_latency_range (*it, false, lr);
264 lr.min = lr.max = _systemic_output_latency;
265 for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
266 set_latency_range (*it, true, lr);
268 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
269 set_latency_range (*it, true, lr);
272 engine.buffer_size_change (bs);
277 DummyAudioBackend::set_interleaved (bool yn)
279 if (!yn) { return 0; }
284 DummyAudioBackend::set_input_channels (uint32_t cc)
291 DummyAudioBackend::set_output_channels (uint32_t cc)
298 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
300 _systemic_input_latency = sl;
305 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
307 _systemic_output_latency = sl;
311 /* Retrieving parameters */
313 DummyAudioBackend::device_name () const
319 DummyAudioBackend::sample_rate () const
325 DummyAudioBackend::buffer_size () const
327 return _samples_per_period;
331 DummyAudioBackend::interleaved () const
337 DummyAudioBackend::input_channels () const
343 DummyAudioBackend::output_channels () const
349 DummyAudioBackend::systemic_input_latency () const
351 return _systemic_input_latency;
355 DummyAudioBackend::systemic_output_latency () const
357 return _systemic_output_latency;
362 std::vector<std::string>
363 DummyAudioBackend::enumerate_midi_options () const
365 if (_midi_options.empty()) {
366 _midi_options.push_back (_("1 in, 1 out, Silence"));
367 _midi_options.push_back (_("2 in, 2 out, Silence"));
368 _midi_options.push_back (_("8 in, 8 out, Silence"));
369 _midi_options.push_back (_("Midi Event Generators"));
370 _midi_options.push_back (_("8 in, 8 out, Loopback"));
371 _midi_options.push_back (_("MIDI to Audio, Loopback"));
372 _midi_options.push_back (_("No MIDI I/O"));
374 return _midi_options;
378 DummyAudioBackend::set_midi_option (const std::string& opt)
380 _midi_mode = MidiNoEvents;
381 if (opt == _("1 in, 1 out, Silence")) {
382 _n_midi_inputs = _n_midi_outputs = 1;
384 else if (opt == _("2 in, 2 out, Silence")) {
385 _n_midi_inputs = _n_midi_outputs = 2;
387 else if (opt == _("8 in, 8 out, Silence")) {
388 _n_midi_inputs = _n_midi_outputs = 8;
390 else if (opt == _("Midi Event Generators")) {
391 _n_midi_inputs = _n_midi_outputs = NUM_MIDI_EVENT_GENERATORS;
392 _midi_mode = MidiGenerator;
394 else if (opt == _("8 in, 8 out, Loopback")) {
395 _n_midi_inputs = _n_midi_outputs = 8;
396 _midi_mode = MidiLoopback;
398 else if (opt == _("MIDI to Audio, Loopback")) {
399 _n_midi_inputs = _n_midi_outputs = UINT32_MAX;
400 _midi_mode = MidiToAudio;
403 _n_midi_inputs = _n_midi_outputs = 0;
409 DummyAudioBackend::midi_option () const
416 static void * pthread_process (void *arg)
418 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
419 d->main_process_thread ();
425 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
428 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
429 return BackendReinitializationError;
432 if (_ports.size () || _portmap.size ()) {
433 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
434 for (PortIndex::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
435 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
437 for (PortMap::const_iterator it = _portmap.begin (); it != _portmap.end (); ++it) {
438 PBD::info << _("DummyAudioBackend: portmap '") << (*it).first << "' exists." << endmsg;
440 _system_inputs.clear();
441 _system_outputs.clear();
442 _system_midi_in.clear();
443 _system_midi_out.clear();
448 if (register_system_ports()) {
449 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
450 return PortRegistrationError;
453 engine.sample_rate_change (_samplerate);
454 engine.buffer_size_change (_samples_per_period);
456 _dsp_load_calc.set_max_time (_samplerate, _samples_per_period);
458 if (engine.reestablish_ports ()) {
459 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
461 return PortReconnectError;
464 engine.reconnect_ports ();
465 _port_change_flag = false;
467 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
468 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
472 while (!_running && --timeout > 0) { Glib::usleep (1000); }
474 if (timeout == 0 || !_running) {
475 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
476 return ProcessThreadStartError;
483 DummyAudioBackend::stop ()
491 if (pthread_join (_main_thread, &status)) {
492 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
500 DummyAudioBackend::freewheel (bool onoff)
502 _freewheeling = onoff;
507 DummyAudioBackend::dsp_load () const
509 return 100.f * _dsp_load;
513 DummyAudioBackend::raw_buffer_size (DataType t)
516 case DataType::AUDIO:
517 return _samples_per_period * sizeof(Sample);
519 return _max_buffer_size; // XXX not really limited
526 DummyAudioBackend::sample_time ()
528 return _processed_samples;
532 DummyAudioBackend::sample_time_at_cycle_start ()
534 return _processed_samples;
538 DummyAudioBackend::samples_since_cycle_start ()
545 DummyAudioBackend::dummy_process_thread (void *arg)
547 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
548 boost::function<void ()> f = td->f;
555 DummyAudioBackend::create_process_thread (boost::function<void()> func)
559 size_t stacksize = 100000;
561 pthread_attr_init (&attr);
562 pthread_attr_setstacksize (&attr, stacksize);
563 ThreadData* td = new ThreadData (this, func, stacksize);
565 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
566 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
567 pthread_attr_destroy (&attr);
570 pthread_attr_destroy (&attr);
572 _threads.push_back (thread_id);
577 DummyAudioBackend::join_process_threads ()
581 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
584 if (pthread_join (*i, &status)) {
585 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
594 DummyAudioBackend::in_process_thread ()
596 if (pthread_equal (_main_thread, pthread_self()) != 0) {
600 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
602 if (pthread_equal (*i, pthread_self ()) != 0) {
610 DummyAudioBackend::process_thread_count ()
612 return _threads.size ();
616 DummyAudioBackend::update_latencies ()
618 // trigger latency callback in RT thread (locked graph)
619 port_connect_add_remove_callback();
625 DummyAudioBackend::private_handle () const
631 DummyAudioBackend::my_name () const
633 return _instance_name;
637 DummyAudioBackend::available () const
643 DummyAudioBackend::port_name_size () const
649 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
651 std::string newname (_instance_name + ":" + name);
653 if (!valid_port (port)) {
654 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
658 if (find_port (newname)) {
659 PBD::error << _("DummyBackend::set_port_name: Port with given name already exists") << endmsg;
663 DummyPort* p = static_cast<DummyPort*>(port);
664 _portmap.erase (p->name());
665 _portmap.insert (make_pair (newname, p));
666 return p->set_name (newname);
670 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
672 if (!valid_port (port)) {
673 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
674 return std::string ();
676 return static_cast<DummyPort*>(port)->name ();
680 DummyAudioBackend::get_port_property (PortHandle port, const std::string& key, std::string& value, std::string& type) const
682 if (!valid_port (port)) {
683 PBD::warning << _("DummyBackend::get_port_property: Invalid Port(s)") << endmsg;
686 if (key == "http://jackaudio.org/metadata/pretty-name") {
688 value = static_cast<DummyPort*>(port)->pretty_name ();
689 if (!value.empty()) {
697 DummyAudioBackend::set_port_property (PortHandle port, const std::string& key, const std::string& value, const std::string& type)
699 if (!valid_port (port)) {
700 PBD::warning << _("DummyBackend::set_port_property: Invalid Port(s)") << endmsg;
703 if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
704 static_cast<DummyPort*>(port)->set_pretty_name (value);
710 PortEngine::PortHandle
711 DummyAudioBackend::get_port_by_name (const std::string& name) const
713 PortHandle port = (PortHandle) find_port (name);
718 DummyAudioBackend::get_ports (
719 const std::string& port_name_pattern,
720 DataType type, PortFlags flags,
721 std::vector<std::string>& port_names) const
725 bool use_regexp = false;
726 if (port_name_pattern.size () > 0) {
727 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
732 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
733 DummyPort* port = *i;
734 if ((port->type () == type) && flags == (port->flags () & flags)) {
735 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
736 port_names.push_back (port->name ());
742 regfree (&port_regex);
748 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
750 if (!valid_port (port)) {
751 return DataType::NIL;
753 return static_cast<DummyPort*>(port)->type ();
756 PortEngine::PortHandle
757 DummyAudioBackend::register_port (
758 const std::string& name,
759 ARDOUR::DataType type,
760 ARDOUR::PortFlags flags)
762 if (name.size () == 0) { return 0; }
763 if (flags & IsPhysical) { return 0; }
765 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
767 return add_port (_instance_name + ":" + name, type, flags);
770 PortEngine::PortHandle
771 DummyAudioBackend::add_port (
772 const std::string& name,
773 ARDOUR::DataType type,
774 ARDOUR::PortFlags flags)
776 assert(name.size ());
777 if (find_port (name)) {
778 PBD::error << _("DummyBackend::register_port: Port already exists:")
779 << " (" << name << ")" << endmsg;
782 DummyPort* port = NULL;
784 case DataType::AUDIO:
785 port = new DummyAudioPort (*this, name, flags);
788 port = new DummyMidiPort (*this, name, flags);
791 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
795 _ports.insert (port);
796 _portmap.insert (make_pair (name, port));
802 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
805 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
806 assert (!valid_port (port_handle));
809 DummyPort* port = static_cast<DummyPort*>(port_handle);
810 PortIndex::iterator i = _ports.find (static_cast<DummyPort*>(port_handle));
811 if (i == _ports.end ()) {
812 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
815 disconnect_all(port_handle);
816 _portmap.erase (port->name());
822 DummyAudioBackend::register_system_ports()
825 enum DummyAudioPort::GeneratorType gt;
826 if (_device == _("Uniform White Noise")) {
827 gt = DummyAudioPort::UniformWhiteNoise;
828 } else if (_device == _("Gaussian White Noise")) {
829 gt = DummyAudioPort::GaussianWhiteNoise;
830 } else if (_device == _("Pink Noise")) {
831 gt = DummyAudioPort::PinkNoise;
832 } else if (_device == _("Pink Noise (low CPU)")) {
833 gt = DummyAudioPort::PonyNoise;
834 } else if (_device == _("Sine Wave")) {
835 gt = DummyAudioPort::SineWave;
836 } else if (_device == _("Square Wave")) {
837 gt = DummyAudioPort::SquareWave;
838 } else if (_device == _("Impulses")) {
839 gt = DummyAudioPort::KronekerDelta;
840 } else if (_device == _("Sine Sweep")) {
841 gt = DummyAudioPort::SineSweep;
842 } else if (_device == _("Sine Sweep Swell")) {
843 gt = DummyAudioPort::SineSweepSwell;
844 } else if (_device == _("Square Sweep")) {
845 gt = DummyAudioPort::SquareSweep;
846 } else if (_device == _("Square Sweep Swell")) {
847 gt = DummyAudioPort::SquareSweepSwell;
848 } else if (_device == _("Loopback")) {
849 gt = DummyAudioPort::Loopback;
850 } else if (_device == _("Demolition")) {
851 gt = DummyAudioPort::Demolition;
852 } else if (_device == _("DC -6dBFS (+.5)")) {
853 gt = DummyAudioPort::DC05;
855 gt = DummyAudioPort::Silence;
858 if (_midi_mode == MidiToAudio) {
859 gt = DummyAudioPort::Loopback;
862 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
863 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
864 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
865 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
869 lr.min = lr.max = _systemic_input_latency;
870 for (int i = 1; i <= a_ins; ++i) {
872 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
873 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
875 set_latency_range (p, false, lr);
876 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
877 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
880 lr.min = lr.max = _systemic_output_latency;
881 for (int i = 1; i <= a_out; ++i) {
883 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
884 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
886 set_latency_range (p, true, lr);
887 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
891 lr.min = lr.max = _systemic_input_latency;
892 for (int i = 0; i < m_ins; ++i) {
894 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
895 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
897 set_latency_range (p, false, lr);
898 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
899 if (_midi_mode == MidiGenerator) {
900 static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
901 static_cast<DummyMidiPort*>(p)->set_pretty_name (DummyMidiData::sequence_names[i % NUM_MIDI_EVENT_GENERATORS]);
905 lr.min = lr.max = _systemic_output_latency;
906 for (int i = 1; i <= m_out; ++i) {
908 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
909 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
911 set_latency_range (p, true, lr);
912 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
914 if (_device == _("Loopback") && _midi_mode == MidiToAudio) {
915 std::stringstream ss;
917 for (int apc = 0; apc < (int)_system_inputs.size(); ++apc) {
918 if ((apc % m_out) + 1 == i) {
919 ss << " >" << (apc + 1);
922 static_cast<DummyMidiPort*>(p)->set_pretty_name (ss.str());
929 DummyAudioBackend::unregister_ports (bool system_only)
931 _system_inputs.clear();
932 _system_outputs.clear();
933 _system_midi_in.clear();
934 _system_midi_out.clear();
936 for (PortIndex::iterator i = _ports.begin (); i != _ports.end ();) {
937 PortIndex::iterator cur = i++;
938 DummyPort* port = *cur;
939 if (! system_only || (port->is_physical () && port->is_terminal ())) {
940 port->disconnect_all ();
941 _portmap.erase (port->name());
949 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
951 DummyPort* src_port = find_port (src);
952 DummyPort* dst_port = find_port (dst);
955 PBD::error << _("DummyBackend::connect: Invalid Source port:")
956 << " (" << src <<")" << endmsg;
960 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
961 << " (" << dst <<")" << endmsg;
964 return src_port->connect (dst_port);
968 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
970 DummyPort* src_port = find_port (src);
971 DummyPort* dst_port = find_port (dst);
973 if (!src_port || !dst_port) {
974 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
977 return src_port->disconnect (dst_port);
981 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
983 DummyPort* dst_port = find_port (dst);
984 if (!valid_port (src)) {
985 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
989 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
990 << " (" << dst << ")" << endmsg;
993 return static_cast<DummyPort*>(src)->connect (dst_port);
997 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
999 DummyPort* dst_port = find_port (dst);
1000 if (!valid_port (src) || !dst_port) {
1001 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
1004 return static_cast<DummyPort*>(src)->disconnect (dst_port);
1008 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
1010 if (!valid_port (port)) {
1011 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1014 static_cast<DummyPort*>(port)->disconnect_all ();
1019 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1021 if (!valid_port (port)) {
1022 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1025 return static_cast<DummyPort*>(port)->is_connected ();
1029 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1031 DummyPort* dst_port = find_port (dst);
1033 if (!valid_port (src) || !dst_port) {
1034 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
1038 return static_cast<DummyPort*>(src)->is_connected (dst_port);
1042 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1044 if (!valid_port (port)) {
1045 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
1048 return static_cast<DummyPort*>(port)->is_physically_connected ();
1052 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1054 if (!valid_port (port)) {
1055 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
1059 assert (0 == names.size ());
1061 const std::set<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
1063 for (std::set<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1064 names.push_back ((*i)->name ());
1067 return (int)names.size ();
1072 DummyAudioBackend::midi_event_get (
1073 pframes_t& timestamp,
1074 size_t& size, uint8_t** buf, void* port_buffer,
1075 uint32_t event_index)
1077 assert (buf && port_buffer);
1078 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
1079 if (event_index >= source.size ()) {
1082 DummyMidiEvent * const event = source[event_index].get ();
1084 timestamp = event->timestamp ();
1085 size = event->size ();
1086 *buf = event->data ();
1091 DummyAudioBackend::midi_event_put (
1093 pframes_t timestamp,
1094 const uint8_t* buffer, size_t size)
1096 assert (buffer && port_buffer);
1097 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
1098 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1099 // nevermind, ::get_buffer() sorts events, but always print warning
1100 fprintf (stderr, "DummyMidiBuffer: it's too late for this event %d > %d.\n", (pframes_t)dst.back ()->timestamp (), timestamp);
1102 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
1103 #if 0 // DEBUG MIDI EVENTS
1104 printf("DummyAudioBackend::midi_event_put %d, %zu: ", timestamp, size);
1105 for (size_t xx = 0; xx < size; ++xx) {
1106 printf(" %02x", buffer[xx]);
1114 DummyAudioBackend::get_midi_event_count (void* port_buffer)
1116 assert (port_buffer);
1117 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1121 DummyAudioBackend::midi_clear (void* port_buffer)
1123 assert (port_buffer);
1124 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1132 DummyAudioBackend::can_monitor_input () const
1138 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1144 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1150 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1155 /* Latency management */
1158 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1160 if (!valid_port (port)) {
1161 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1163 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1167 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1170 if (!valid_port (port)) {
1171 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1176 DummyPort *p = static_cast<DummyPort*>(port);
1179 r = p->latency_range (for_playback);
1180 if (p->is_physical() && p->is_terminal()) {
1181 if (p->is_input() && for_playback) {
1182 const size_t l_in = _samples_per_period * .25;
1186 if (p->is_output() && !for_playback) {
1187 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1188 const size_t l_in = _samples_per_period * .25;
1189 const size_t l_out = _samples_per_period - l_in;
1197 /* Discovering physical ports */
1200 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1202 if (!valid_port (port)) {
1203 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1206 return static_cast<DummyPort*>(port)->is_physical ();
1210 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1212 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1213 DummyPort* port = *i;
1214 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1215 port_names.push_back (port->name ());
1221 DummyAudioBackend::get_physical_inputs (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_output () && port->is_physical ()) {
1226 port_names.push_back (port->name ());
1232 DummyAudioBackend::n_physical_outputs () const
1236 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
1237 DummyPort* port = *i;
1238 if (port->is_output () && port->is_physical ()) {
1239 switch (port->type ()) {
1240 case DataType::AUDIO: ++n_audio; break;
1241 case DataType::MIDI: ++n_midi; break;
1247 cc.set (DataType::AUDIO, n_audio);
1248 cc.set (DataType::MIDI, n_midi);
1253 DummyAudioBackend::n_physical_inputs () const
1257 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
1258 DummyPort* port = *i;
1259 if (port->is_input () && port->is_physical ()) {
1260 switch (port->type ()) {
1261 case DataType::AUDIO: ++n_audio; break;
1262 case DataType::MIDI: ++n_midi; break;
1268 cc.set (DataType::AUDIO, n_audio);
1269 cc.set (DataType::MIDI, n_midi);
1273 /* Getting access to the data buffer for a port */
1276 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1279 assert (valid_port (port));
1280 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1283 /* Engine Process */
1285 DummyAudioBackend::main_process_thread ()
1287 AudioEngine::thread_init_callback (this);
1289 _processed_samples = 0;
1291 manager.registration_callback();
1292 manager.graph_order_callback();
1298 if (_freewheeling != _freewheel) {
1299 _freewheel = _freewheeling;
1300 engine.freewheel_callback (_freewheel);
1303 // re-set input buffers, generate on demand.
1304 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1305 (*it)->next_period();
1307 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1308 (*it)->next_period();
1311 if (engine.process_callback (_samples_per_period)) {
1314 _processed_samples += _samples_per_period;
1316 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1318 int opc = _system_outputs.size();
1319 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1320 DummyAudioPort* op = _system_outputs[(opn % opc)];
1321 (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
1325 if (_midi_mode == MidiLoopback) {
1327 int opc = _system_midi_out.size();
1328 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1329 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1330 op->get_buffer(0); // mix-down
1331 (*it)->set_loopback (op->const_buffer());
1334 else if (_midi_mode == MidiToAudio) {
1336 int opc = _system_midi_out.size();
1337 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1338 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1339 op->get_buffer(0); // mix-down
1340 (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
1345 _dsp_load_calc.set_start_timestamp_us (clock1);
1346 _dsp_load_calc.set_stop_timestamp_us (_x_get_monotonic_usec());
1347 _dsp_load = _dsp_load_calc.get_dsp_load_unbound ();
1349 const int64_t elapsed_time = _dsp_load_calc.elapsed_time_us ();
1350 const int64_t nominal_time = _dsp_load_calc.get_max_time_us ();
1351 if (elapsed_time < nominal_time) {
1352 const int64_t sleepy = _speedup * (nominal_time - elapsed_time);
1353 Glib::usleep (std::max ((int64_t) 100, sleepy));
1355 Glib::usleep (100); // don't hog cpu
1359 Glib::usleep (100); // don't hog cpu
1362 /* beginning of next cycle */
1363 clock1 = _x_get_monotonic_usec();
1365 bool connections_changed = false;
1366 bool ports_changed = false;
1367 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1368 if (_port_change_flag) {
1369 ports_changed = true;
1370 _port_change_flag = false;
1372 if (!_port_connection_queue.empty ()) {
1373 connections_changed = true;
1375 while (!_port_connection_queue.empty ()) {
1376 PortConnectData *c = _port_connection_queue.back ();
1377 manager.connect_callback (c->a, c->b, c->c);
1378 _port_connection_queue.pop_back ();
1381 pthread_mutex_unlock (&_port_callback_mutex);
1383 if (ports_changed) {
1384 manager.registration_callback();
1386 if (connections_changed) {
1387 manager.graph_order_callback();
1389 if (connections_changed || ports_changed) {
1390 engine.latency_callback(false);
1391 engine.latency_callback(true);
1400 /******************************************************************************/
1402 static boost::shared_ptr<DummyAudioBackend> _instance;
1404 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1405 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1406 static int deinstantiate ();
1407 static bool already_configured ();
1408 static bool available ();
1410 static ARDOUR::AudioBackendInfo _descriptor = {
1419 static boost::shared_ptr<AudioBackend>
1420 backend_factory (AudioEngine& e)
1423 _instance.reset (new DummyAudioBackend (e, _descriptor));
1429 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1431 s_instance_name = arg1;
1443 already_configured ()
1445 // special-case: unit-tests require backend to be pre-configured.
1446 if (s_instance_name == "Unit-Test") {
1458 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1460 return &_descriptor;
1464 /******************************************************************************/
1465 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1466 : _dummy_backend (b)
1470 , _gen_cycle (false)
1472 _capture_latency_range.min = 0;
1473 _capture_latency_range.max = 0;
1474 _playback_latency_range.min = 0;
1475 _playback_latency_range.max = 0;
1476 _dummy_backend.port_connect_add_remove_callback();
1479 DummyPort::~DummyPort () {
1481 _dummy_backend.port_connect_add_remove_callback();
1485 int DummyPort::connect (DummyPort *port)
1488 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1492 if (type () != port->type ()) {
1493 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1497 if (is_output () && port->is_output ()) {
1498 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1502 if (is_input () && port->is_input ()) {
1503 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1508 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1512 if (is_connected (port)) {
1513 #if 0 // don't bother to warn about this for now. just ignore it
1514 PBD::error << _("DummyPort::connect (): ports are already connected:")
1515 << " (" << name () << ") -> (" << port->name () << ")"
1521 _connect (port, true);
1526 void DummyPort::_connect (DummyPort *port, bool callback)
1528 _connections.insert (port);
1530 port->_connect (this, false);
1531 _dummy_backend.port_connect_callback (name(), port->name(), true);
1535 int DummyPort::disconnect (DummyPort *port)
1538 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1542 if (!is_connected (port)) {
1543 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1544 << " (" << name () << ") -> (" << port->name () << ")"
1548 _disconnect (port, true);
1552 void DummyPort::_disconnect (DummyPort *port, bool callback)
1554 std::set<DummyPort*>::iterator it = _connections.find (port);
1555 assert (it != _connections.end ());
1556 _connections.erase (it);
1558 port->_disconnect (this, false);
1559 _dummy_backend.port_connect_callback (name(), port->name(), false);
1564 void DummyPort::disconnect_all ()
1566 while (!_connections.empty ()) {
1567 std::set<DummyPort*>::iterator it = _connections.begin ();
1568 (*it)->_disconnect (this, false);
1569 _dummy_backend.port_connect_callback (name(), (*it)->name(), false);
1570 _connections.erase (it);
1575 DummyPort::is_connected (const DummyPort *port) const
1577 return _connections.find (const_cast<DummyPort *>(port)) != _connections.end ();
1580 bool DummyPort::is_physically_connected () const
1582 for (std::set<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1583 if ((*it)->is_physical ()) {
1590 void DummyPort::setup_random_number_generator ()
1592 #ifdef PLATFORM_WINDOWS
1593 LARGE_INTEGER Count;
1594 if (QueryPerformanceCounter (&Count)) {
1595 _rseed = Count.QuadPart % UINT_MAX;
1599 _rseed = g_get_monotonic_time() % UINT_MAX;
1601 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1602 if (_rseed == 0) _rseed = 1;
1608 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1609 // http://www.firstpr.com.au/dsp/rand31/
1611 lo = 16807 * (_rseed & 0xffff);
1612 hi = 16807 * (_rseed >> 16);
1614 lo += (hi & 0x7fff) << 16;
1617 lo = (lo & 0x7fffffff) + (lo >> 31);
1619 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1621 return (_rseed = lo);
1627 return (randi() / 1073741824.f) - 1.f;
1630 /******************************************************************************/
1632 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1633 : DummyPort (b, name, flags)
1634 , _gen_type (Silence)
1650 memset (_buffer, 0, sizeof (_buffer));
1653 DummyAudioPort::~DummyAudioPort () {
1658 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1660 DummyPort::setup_random_number_generator();
1663 switch (_gen_type) {
1666 case UniformWhiteNoise:
1667 case GaussianWhiteNoise:
1672 _gen_period = 3 * samplerate;
1675 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1678 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1681 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1682 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1683 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1684 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1688 case SquareSweepSwell:
1690 case SineSweepSwell:
1692 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1694 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1695 const double f_min = 20.;
1696 const double f_max = samplerate * .5;
1697 const double g_p2 = _gen_period * .5;
1699 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1700 const double a = f_min / samplerate;
1702 const double b = log (f_max / f_min) / g_p2;
1703 const double a = f_min / (b * samplerate);
1705 const uint32_t g_p2i = rint(g_p2);
1706 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1707 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1709 const double phase = i * (a + b * i);
1711 const double phase = a * exp (b * i) - a;
1713 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1715 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1716 const uint32_t j = _gen_period - i;
1718 const double phase = j * (a + b * j);
1720 const double phase = a * exp (b * j) - a;
1722 _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
1724 if (_gen_type == SquareSweep) {
1725 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1726 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1729 else if (_gen_type == SquareSweepSwell) {
1730 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1731 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1737 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1742 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1744 memset(_wavetable, 0, n_samples * sizeof(float));
1745 /* generate an audio spike for every midi message
1746 * to verify layency-compensation alignment
1747 * (here: midi-out playback-latency + audio-in capture-latency)
1749 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1750 const pframes_t t = (*it)->timestamp();
1751 assert(t < n_samples);
1752 // somewhat arbitrary mapping for quick visual feedback
1754 if ((*it)->size() == 3) {
1755 const unsigned char *d = (*it)->const_data();
1756 if ((d[0] & 0xf0) == 0x90) { // note on
1757 v = .25f + d[2] / 512.f;
1759 else if ((d[0] & 0xf0) == 0x80) { // note off
1760 v = .3f - d[2] / 640.f;
1762 else if ((d[0] & 0xf0) == 0xb0) { // CC
1763 v = -.1f - d[2] / 256.f;
1770 float DummyAudioPort::grandf ()
1772 // Gaussian White Noise
1773 // http://www.musicdsp.org/archive.php?classid=0#109
1784 r = x1 * x1 + x2 * x2;
1785 } while ((r >= 1.0f) || (r < 1e-22f));
1787 r = sqrtf (-2.f * logf (r) / r);
1794 /* inspired by jack-demolition by Steve Harris */
1795 static const float _demolition[] = {
1796 0.0f, /* special case - 0dbFS white noise */
1797 0.0f, /* zero, may cause denomrals following a signal */
1798 0.73 / 1e45, /* very small - should be denormal when floated */
1799 3.7f, /* arbitrary number > 0dBFS */
1800 -4.3f, /* arbitrary negative number > 0dBFS */
1801 4294967395.0f, /* 2^16 + 100 */
1803 HUGE, /* Big, non-inf number */
1805 -1.f/0.f, /* -inf */
1806 -0.f/0.f, /* -nan */
1808 0.0f, /* some silence to check for recovery */
1811 void DummyAudioPort::generate (const pframes_t n_samples)
1813 Glib::Threads::Mutex::Lock lm (generator_lock);
1818 switch (_gen_type) {
1820 memset (_buffer, 0, n_samples * sizeof (Sample));
1823 for (pframes_t i = 0 ; i < n_samples; ++i) {
1828 switch (_gen_count2) {
1830 for (pframes_t i = 0 ; i < n_samples; ++i) {
1831 _buffer[i] = randf();
1835 for (pframes_t i = 0 ; i < n_samples; ++i) {
1836 _buffer[i] = _demolition [_gen_count2];
1840 _gen_offset += n_samples;
1841 if (_gen_offset > _gen_period) {
1843 _gen_count2 = (_gen_count2 + 1) % (sizeof (_demolition) / sizeof (float));
1847 assert(_gen_period > 0);
1848 for (pframes_t i = 0 ; i < n_samples; ++i) {
1849 if (_gen_offset < _gen_period * .5f) {
1850 _buffer[i] = .40709f; // -6dBFS
1852 _buffer[i] = -.40709f;
1854 _gen_offset = (_gen_offset + 1) % _gen_period;
1858 assert(_gen_period > 0);
1859 memset (_buffer, 0, n_samples * sizeof (Sample));
1860 for (pframes_t i = 0; i < n_samples; ++i) {
1861 if (_gen_offset == 0) {
1864 _gen_offset = (_gen_offset + 1) % _gen_period;
1867 case SineSweepSwell:
1868 case SquareSweepSwell:
1869 assert(_wavetable && _gen_period > 0);
1871 const float vols = 2.f / (float)_gen_perio2;
1872 for (pframes_t i = 0; i < n_samples; ++i) {
1873 const float g = fabsf (_gen_count2 * vols - 1.f);
1874 _buffer[i] = g * _wavetable[_gen_offset];
1875 _gen_offset = (_gen_offset + 1) % _gen_period;
1876 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1881 _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
1885 assert(_wavetable && _gen_period > 0);
1887 pframes_t written = 0;
1888 while (written < n_samples) {
1889 const uint32_t remain = n_samples - written;
1890 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
1891 memcpy((void*)&_buffer[written],
1892 (void*)&_wavetable[_gen_offset],
1893 to_copy * sizeof(Sample));
1895 _gen_offset = (_gen_offset + to_copy) % _gen_period;
1899 case UniformWhiteNoise:
1900 for (pframes_t i = 0 ; i < n_samples; ++i) {
1901 _buffer[i] = .158489f * randf();
1904 case GaussianWhiteNoise:
1905 for (pframes_t i = 0 ; i < n_samples; ++i) {
1906 _buffer[i] = .089125f * grandf();
1910 for (pframes_t i = 0 ; i < n_samples; ++i) {
1911 // Paul Kellet's refined method
1912 // http://www.musicdsp.org/files/pink.txt
1913 // NB. If 'white' consists of uniform random numbers,
1914 // the pink noise will have an almost gaussian distribution.
1915 const float white = .0498f * randf ();
1916 _b0 = .99886f * _b0 + white * .0555179f;
1917 _b1 = .99332f * _b1 + white * .0750759f;
1918 _b2 = .96900f * _b2 + white * .1538520f;
1919 _b3 = .86650f * _b3 + white * .3104856f;
1920 _b4 = .55000f * _b4 + white * .5329522f;
1921 _b5 = -.7616f * _b5 - white * .0168980f;
1922 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
1923 _b6 = white * 0.115926f;
1927 for (pframes_t i = 0 ; i < n_samples; ++i) {
1928 const float white = 0.0498f * randf ();
1929 // Paul Kellet's economy method
1930 // http://www.musicdsp.org/files/pink.txt
1931 _b0 = 0.99765f * _b0 + white * 0.0990460f;
1932 _b1 = 0.96300f * _b1 + white * 0.2965164f;
1933 _b2 = 0.57000f * _b2 + white * 1.0526913f;
1934 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
1941 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1944 const std::set<DummyPort *>& connections = get_connections ();
1945 std::set<DummyPort*>::const_iterator it = connections.begin ();
1946 if (it == connections.end ()) {
1947 memset (_buffer, 0, n_samples * sizeof (Sample));
1949 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1950 assert (source && source->is_output ());
1951 if (source->is_physical() && source->is_terminal()) {
1952 source->get_buffer(n_samples); // generate signal.
1954 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1955 while (++it != connections.end ()) {
1956 source = static_cast<DummyAudioPort*>(*it);
1957 assert (source && source->is_output ());
1958 Sample* dst = buffer ();
1959 if (source->is_physical() && source->is_terminal()) {
1960 source->get_buffer(n_samples); // generate signal.
1962 const Sample* src = source->const_buffer ();
1963 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1968 } else if (is_output () && is_physical () && is_terminal()) {
1970 generate(n_samples);
1977 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1978 : DummyPort (b, name, flags)
1980 , _midi_seq_time (0)
1987 DummyMidiPort::~DummyMidiPort () {
1992 struct MidiEventSorter {
1993 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1998 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
2001 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2002 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2006 void DummyMidiPort::setup_generator (int seq_id, const float sr)
2008 DummyPort::setup_random_number_generator();
2009 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
2010 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
2015 void DummyMidiPort::midi_generate (const pframes_t n_samples)
2017 Glib::Threads::Mutex::Lock lm (generator_lock);
2025 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
2026 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
2027 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2033 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
2034 if (ev_beat_time < 0) {
2037 if ((pframes_t) ev_beat_time >= n_samples) {
2040 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
2042 _midi_seq_dat[_midi_seq_pos].event,
2043 _midi_seq_dat[_midi_seq_pos].size
2047 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
2048 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
2052 _midi_seq_time += n_samples;
2056 void* DummyMidiPort::get_buffer (pframes_t n_samples)
2060 const std::set<DummyPort*>& connections = get_connections ();
2061 for (std::set<DummyPort*>::const_iterator i = connections.begin ();
2062 i != connections.end ();
2064 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
2065 if (source->is_physical() && source->is_terminal()) {
2066 source->get_buffer(n_samples); // generate signal.
2068 const DummyMidiBuffer *src = source->const_buffer ();
2069 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2070 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2073 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
2074 } else if (is_output () && is_physical () && is_terminal()) {
2076 midi_generate(n_samples);
2082 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2084 , _timestamp (timestamp)
2088 _data = (uint8_t*) malloc (size);
2089 memcpy (_data, data, size);
2093 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
2094 : _size (other.size ())
2095 , _timestamp (other.timestamp ())
2098 if (other.size () && other.const_data ()) {
2099 _data = (uint8_t*) malloc (other.size ());
2100 memcpy (_data, other.const_data (), other.size ());
2104 DummyMidiEvent::~DummyMidiEvent () {