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 (_("Sine Wave"), true));
116 _device_status.push_back (DeviceStatus (_("Square Wave"), true));
117 _device_status.push_back (DeviceStatus (_("Impulses"), true));
118 _device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
119 _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
120 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
121 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
122 _device_status.push_back (DeviceStatus (_("Sine Sweep"), true));
123 _device_status.push_back (DeviceStatus (_("Sine Sweep Swell"), true));
124 _device_status.push_back (DeviceStatus (_("Square Sweep"), true));
125 _device_status.push_back (DeviceStatus (_("Square Sweep Swell"), true));
126 _device_status.push_back (DeviceStatus (_("Loopback"), true));
128 return _device_status;
132 DummyAudioBackend::available_sample_rates (const std::string&) const
134 std::vector<float> sr;
135 sr.push_back (8000.0);
136 sr.push_back (22050.0);
137 sr.push_back (24000.0);
138 sr.push_back (44100.0);
139 sr.push_back (48000.0);
140 sr.push_back (88200.0);
141 sr.push_back (96000.0);
142 sr.push_back (176400.0);
143 sr.push_back (192000.0);
147 std::vector<uint32_t>
148 DummyAudioBackend::available_buffer_sizes (const std::string&) const
150 std::vector<uint32_t> bs;
167 DummyAudioBackend::available_input_channel_count (const std::string&) const
173 DummyAudioBackend::available_output_channel_count (const std::string&) const
179 DummyAudioBackend::can_change_sample_rate_when_running () const
185 DummyAudioBackend::can_change_buffer_size_when_running () const
190 std::vector<std::string>
191 DummyAudioBackend::enumerate_drivers () const
193 std::vector<std::string> speed_drivers;
194 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
195 speed_drivers.push_back (it->name);
197 return speed_drivers;
201 DummyAudioBackend::driver_name () const
203 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
204 if (rintf (1e6f * _speedup) == rintf (1e6f * it->speedup)) {
209 return _("Normal Speed");
213 DummyAudioBackend::set_driver (const std::string& d)
215 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
217 _speedup = it->speedup;
226 DummyAudioBackend::set_device_name (const std::string& d)
233 DummyAudioBackend::set_sample_rate (float sr)
235 if (sr <= 0) { return -1; }
237 engine.sample_rate_change (sr);
242 DummyAudioBackend::set_buffer_size (uint32_t bs)
244 if (bs <= 0 || bs > _max_buffer_size) {
247 _samples_per_period = bs;
249 /* update port latencies
250 * with 'Loopback' there is exactly once cycle latency,
251 * divide it between In + Out;
254 lr.min = lr.max = _systemic_input_latency;
255 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
256 set_latency_range (*it, false, lr);
258 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
259 set_latency_range (*it, false, lr);
262 lr.min = lr.max = _systemic_output_latency;
263 for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
264 set_latency_range (*it, true, lr);
266 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
267 set_latency_range (*it, true, lr);
270 engine.buffer_size_change (bs);
275 DummyAudioBackend::set_interleaved (bool yn)
277 if (!yn) { return 0; }
282 DummyAudioBackend::set_input_channels (uint32_t cc)
289 DummyAudioBackend::set_output_channels (uint32_t cc)
296 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
298 _systemic_input_latency = sl;
303 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
305 _systemic_output_latency = sl;
309 /* Retrieving parameters */
311 DummyAudioBackend::device_name () const
317 DummyAudioBackend::sample_rate () const
323 DummyAudioBackend::buffer_size () const
325 return _samples_per_period;
329 DummyAudioBackend::interleaved () const
335 DummyAudioBackend::input_channels () const
341 DummyAudioBackend::output_channels () const
347 DummyAudioBackend::systemic_input_latency () const
349 return _systemic_input_latency;
353 DummyAudioBackend::systemic_output_latency () const
355 return _systemic_output_latency;
360 std::vector<std::string>
361 DummyAudioBackend::enumerate_midi_options () const
363 if (_midi_options.empty()) {
364 _midi_options.push_back (_("1 in, 1 out, Silence"));
365 _midi_options.push_back (_("2 in, 2 out, Silence"));
366 _midi_options.push_back (_("8 in, 8 out, Silence"));
367 _midi_options.push_back (_("Midi Event Generators"));
368 _midi_options.push_back (_("8 in, 8 out, Loopback"));
369 _midi_options.push_back (_("MIDI to Audio, Loopback"));
370 _midi_options.push_back (_("No MIDI I/O"));
372 return _midi_options;
376 DummyAudioBackend::set_midi_option (const std::string& opt)
378 _midi_mode = MidiNoEvents;
379 if (opt == _("1 in, 1 out, Silence")) {
380 _n_midi_inputs = _n_midi_outputs = 1;
382 else if (opt == _("2 in, 2 out, Silence")) {
383 _n_midi_inputs = _n_midi_outputs = 2;
385 else if (opt == _("8 in, 8 out, Silence")) {
386 _n_midi_inputs = _n_midi_outputs = 8;
388 else if (opt == _("Midi Event Generators")) {
389 _n_midi_inputs = _n_midi_outputs = NUM_MIDI_EVENT_GENERATORS;
390 _midi_mode = MidiGenerator;
392 else if (opt == _("8 in, 8 out, Loopback")) {
393 _n_midi_inputs = _n_midi_outputs = 8;
394 _midi_mode = MidiLoopback;
396 else if (opt == _("MIDI to Audio, Loopback")) {
397 _n_midi_inputs = _n_midi_outputs = UINT32_MAX;
398 _midi_mode = MidiToAudio;
401 _n_midi_inputs = _n_midi_outputs = 0;
407 DummyAudioBackend::midi_option () const
414 static void * pthread_process (void *arg)
416 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
417 d->main_process_thread ();
423 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
426 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
427 return BackendReinitializationError;
431 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
432 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
433 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
435 _system_inputs.clear();
436 _system_outputs.clear();
437 _system_midi_in.clear();
438 _system_midi_out.clear();
442 if (register_system_ports()) {
443 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
444 return PortRegistrationError;
447 engine.sample_rate_change (_samplerate);
448 engine.buffer_size_change (_samples_per_period);
450 _dsp_load_calc.set_max_time (_samplerate, _samples_per_period);
452 if (engine.reestablish_ports ()) {
453 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
455 return PortReconnectError;
458 engine.reconnect_ports ();
459 _port_change_flag = false;
461 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
462 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
466 while (!_running && --timeout > 0) { Glib::usleep (1000); }
468 if (timeout == 0 || !_running) {
469 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
470 return ProcessThreadStartError;
477 DummyAudioBackend::stop ()
485 if (pthread_join (_main_thread, &status)) {
486 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
494 DummyAudioBackend::freewheel (bool onoff)
496 _freewheeling = onoff;
501 DummyAudioBackend::dsp_load () const
503 return 100.f * _dsp_load;
507 DummyAudioBackend::raw_buffer_size (DataType t)
510 case DataType::AUDIO:
511 return _samples_per_period * sizeof(Sample);
513 return _max_buffer_size; // XXX not really limited
520 DummyAudioBackend::sample_time ()
522 return _processed_samples;
526 DummyAudioBackend::sample_time_at_cycle_start ()
528 return _processed_samples;
532 DummyAudioBackend::samples_since_cycle_start ()
539 DummyAudioBackend::dummy_process_thread (void *arg)
541 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
542 boost::function<void ()> f = td->f;
549 DummyAudioBackend::create_process_thread (boost::function<void()> func)
553 size_t stacksize = 100000;
555 pthread_attr_init (&attr);
556 pthread_attr_setstacksize (&attr, stacksize);
557 ThreadData* td = new ThreadData (this, func, stacksize);
559 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
560 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
561 pthread_attr_destroy (&attr);
564 pthread_attr_destroy (&attr);
566 _threads.push_back (thread_id);
571 DummyAudioBackend::join_process_threads ()
575 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
578 if (pthread_join (*i, &status)) {
579 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
588 DummyAudioBackend::in_process_thread ()
590 if (pthread_equal (_main_thread, pthread_self()) != 0) {
594 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
596 if (pthread_equal (*i, pthread_self ()) != 0) {
604 DummyAudioBackend::process_thread_count ()
606 return _threads.size ();
610 DummyAudioBackend::update_latencies ()
612 // trigger latency callback in RT thread (locked graph)
613 port_connect_add_remove_callback();
619 DummyAudioBackend::private_handle () const
625 DummyAudioBackend::my_name () const
627 return _instance_name;
631 DummyAudioBackend::available () const
637 DummyAudioBackend::port_name_size () const
643 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
645 if (!valid_port (port)) {
646 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
649 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
653 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
655 if (!valid_port (port)) {
656 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
657 return std::string ();
659 return static_cast<DummyPort*>(port)->name ();
663 DummyAudioBackend::get_port_property (PortHandle port, const std::string& key, std::string& value, std::string& type) const
665 if (!valid_port (port)) {
666 PBD::warning << _("DummyBackend::get_port_property: Invalid Port(s)") << endmsg;
669 if (key == "http://jackaudio.org/metadata/pretty-name") {
671 value = static_cast<DummyPort*>(port)->pretty_name ();
672 if (!value.empty()) {
680 DummyAudioBackend::set_port_property (PortHandle port, const std::string& key, const std::string& value, const std::string& type)
682 if (!valid_port (port)) {
683 PBD::warning << _("DummyBackend::set_port_property: Invalid Port(s)") << endmsg;
686 if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
687 static_cast<DummyPort*>(port)->set_pretty_name (value);
693 PortEngine::PortHandle
694 DummyAudioBackend::get_port_by_name (const std::string& name) const
696 PortHandle port = (PortHandle) find_port (name);
701 DummyAudioBackend::get_ports (
702 const std::string& port_name_pattern,
703 DataType type, PortFlags flags,
704 std::vector<std::string>& port_names) const
708 bool use_regexp = false;
709 if (port_name_pattern.size () > 0) {
710 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
714 for (size_t i = 0; i < _ports.size (); ++i) {
715 DummyPort* port = _ports[i];
716 if ((port->type () == type) && flags == (port->flags () & flags)) {
717 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
718 port_names.push_back (port->name ());
724 regfree (&port_regex);
730 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
732 if (!valid_port (port)) {
733 return DataType::NIL;
735 return static_cast<DummyPort*>(port)->type ();
738 PortEngine::PortHandle
739 DummyAudioBackend::register_port (
740 const std::string& name,
741 ARDOUR::DataType type,
742 ARDOUR::PortFlags flags)
744 if (name.size () == 0) { return 0; }
745 if (flags & IsPhysical) { return 0; }
747 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
749 return add_port (_instance_name + ":" + name, type, flags);
752 PortEngine::PortHandle
753 DummyAudioBackend::add_port (
754 const std::string& name,
755 ARDOUR::DataType type,
756 ARDOUR::PortFlags flags)
758 assert(name.size ());
759 if (find_port (name)) {
760 PBD::error << _("DummyBackend::register_port: Port already exists:")
761 << " (" << name << ")" << endmsg;
764 DummyPort* port = NULL;
766 case DataType::AUDIO:
767 port = new DummyAudioPort (*this, name, flags);
770 port = new DummyMidiPort (*this, name, flags);
773 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
777 _ports.push_back (port);
783 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
786 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
787 assert (!valid_port (port_handle));
790 DummyPort* port = static_cast<DummyPort*>(port_handle);
791 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
792 if (i == _ports.end ()) {
793 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
796 disconnect_all(port_handle);
802 DummyAudioBackend::register_system_ports()
805 enum DummyAudioPort::GeneratorType gt;
806 if (_device == _("Uniform White Noise")) {
807 gt = DummyAudioPort::UniformWhiteNoise;
808 } else if (_device == _("Gaussian White Noise")) {
809 gt = DummyAudioPort::GaussianWhiteNoise;
810 } else if (_device == _("Pink Noise")) {
811 gt = DummyAudioPort::PinkNoise;
812 } else if (_device == _("Pink Noise (low CPU)")) {
813 gt = DummyAudioPort::PonyNoise;
814 } else if (_device == _("Sine Wave")) {
815 gt = DummyAudioPort::SineWave;
816 } else if (_device == _("Square Wave")) {
817 gt = DummyAudioPort::SquareWave;
818 } else if (_device == _("Impulses")) {
819 gt = DummyAudioPort::KronekerDelta;
820 } else if (_device == _("Sine Sweep")) {
821 gt = DummyAudioPort::SineSweep;
822 } else if (_device == _("Sine Sweep Swell")) {
823 gt = DummyAudioPort::SineSweepSwell;
824 } else if (_device == _("Square Sweep")) {
825 gt = DummyAudioPort::SquareSweep;
826 } else if (_device == _("Square Sweep Swell")) {
827 gt = DummyAudioPort::SquareSweepSwell;
828 } else if (_device == _("Loopback")) {
829 gt = DummyAudioPort::Loopback;
831 gt = DummyAudioPort::Silence;
834 if (_midi_mode == MidiToAudio) {
835 gt = DummyAudioPort::Loopback;
838 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
839 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
840 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
841 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
845 lr.min = lr.max = _systemic_input_latency;
846 for (int i = 1; i <= a_ins; ++i) {
848 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
849 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
851 set_latency_range (p, false, lr);
852 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
853 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
856 lr.min = lr.max = _systemic_output_latency;
857 for (int i = 1; i <= a_out; ++i) {
859 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
860 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
862 set_latency_range (p, true, lr);
863 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
867 lr.min = lr.max = _systemic_input_latency;
868 for (int i = 0; i < m_ins; ++i) {
870 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
871 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
873 set_latency_range (p, false, lr);
874 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
875 if (_midi_mode == MidiGenerator) {
876 static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
877 static_cast<DummyMidiPort*>(p)->set_pretty_name (DummyMidiData::sequence_names[i % NUM_MIDI_EVENT_GENERATORS]);
881 lr.min = lr.max = _systemic_output_latency;
882 for (int i = 1; i <= m_out; ++i) {
884 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
885 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
887 set_latency_range (p, true, lr);
888 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
890 if (_device == _("Loopback") && _midi_mode == MidiToAudio) {
891 std::stringstream ss;
893 for (int apc = 0; apc < (int)_system_inputs.size(); ++apc) {
894 if ((apc % m_out) + 1 == i) {
895 ss << " >" << (apc + 1);
898 static_cast<DummyMidiPort*>(p)->set_pretty_name (ss.str());
905 DummyAudioBackend::unregister_ports (bool system_only)
907 _system_inputs.clear();
908 _system_outputs.clear();
909 _system_midi_in.clear();
910 _system_midi_out.clear();
912 for (std::vector<DummyPort*>::iterator i = _ports.begin (); i != _ports.end ();) {
913 DummyPort* port = *i;
914 if (! system_only || (port->is_physical () && port->is_terminal ())) {
915 port->disconnect_all ();
917 i = _ports.erase (i);
925 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
927 DummyPort* src_port = find_port (src);
928 DummyPort* dst_port = find_port (dst);
931 PBD::error << _("DummyBackend::connect: Invalid Source port:")
932 << " (" << src <<")" << endmsg;
936 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
937 << " (" << dst <<")" << endmsg;
940 return src_port->connect (dst_port);
944 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
946 DummyPort* src_port = find_port (src);
947 DummyPort* dst_port = find_port (dst);
949 if (!src_port || !dst_port) {
950 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
953 return src_port->disconnect (dst_port);
957 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
959 DummyPort* dst_port = find_port (dst);
960 if (!valid_port (src)) {
961 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
965 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
966 << " (" << dst << ")" << endmsg;
969 return static_cast<DummyPort*>(src)->connect (dst_port);
973 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
975 DummyPort* dst_port = find_port (dst);
976 if (!valid_port (src) || !dst_port) {
977 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
980 return static_cast<DummyPort*>(src)->disconnect (dst_port);
984 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
986 if (!valid_port (port)) {
987 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
990 static_cast<DummyPort*>(port)->disconnect_all ();
995 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
997 if (!valid_port (port)) {
998 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1001 return static_cast<DummyPort*>(port)->is_connected ();
1005 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1007 DummyPort* dst_port = find_port (dst);
1008 if (!valid_port (src) || !dst_port) {
1009 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
1012 return static_cast<DummyPort*>(src)->is_connected (dst_port);
1016 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1018 if (!valid_port (port)) {
1019 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
1022 return static_cast<DummyPort*>(port)->is_physically_connected ();
1026 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1028 if (!valid_port (port)) {
1029 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
1033 assert (0 == names.size ());
1035 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
1037 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1038 names.push_back ((*i)->name ());
1041 return (int)names.size ();
1046 DummyAudioBackend::midi_event_get (
1047 pframes_t& timestamp,
1048 size_t& size, uint8_t** buf, void* port_buffer,
1049 uint32_t event_index)
1051 assert (buf && port_buffer);
1052 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
1053 if (event_index >= source.size ()) {
1056 DummyMidiEvent * const event = source[event_index].get ();
1058 timestamp = event->timestamp ();
1059 size = event->size ();
1060 *buf = event->data ();
1065 DummyAudioBackend::midi_event_put (
1067 pframes_t timestamp,
1068 const uint8_t* buffer, size_t size)
1070 assert (buffer && port_buffer);
1071 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
1072 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1073 // nevermind, ::get_buffer() sorts events, but always print warning
1074 fprintf (stderr, "DummyMidiBuffer: it's too late for this event %d > %d.\n", (pframes_t)dst.back ()->timestamp (), timestamp);
1076 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
1077 #if 0 // DEBUG MIDI EVENTS
1078 printf("DummyAudioBackend::midi_event_put %d, %zu: ", timestamp, size);
1079 for (size_t xx = 0; xx < size; ++xx) {
1080 printf(" %02x", buffer[xx]);
1088 DummyAudioBackend::get_midi_event_count (void* port_buffer)
1090 assert (port_buffer);
1091 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1095 DummyAudioBackend::midi_clear (void* port_buffer)
1097 assert (port_buffer);
1098 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1106 DummyAudioBackend::can_monitor_input () const
1112 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1118 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1124 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1129 /* Latency management */
1132 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1134 if (!valid_port (port)) {
1135 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1137 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1141 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1144 if (!valid_port (port)) {
1145 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1150 DummyPort *p = static_cast<DummyPort*>(port);
1153 r = p->latency_range (for_playback);
1154 if (p->is_physical() && p->is_terminal()) {
1155 if (p->is_input() && for_playback) {
1156 const size_t l_in = _samples_per_period * .25;
1160 if (p->is_output() && !for_playback) {
1161 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1162 const size_t l_in = _samples_per_period * .25;
1163 const size_t l_out = _samples_per_period - l_in;
1171 /* Discovering physical ports */
1174 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1176 if (!valid_port (port)) {
1177 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1180 return static_cast<DummyPort*>(port)->is_physical ();
1184 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1186 for (size_t i = 0; i < _ports.size (); ++i) {
1187 DummyPort* port = _ports[i];
1188 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1189 port_names.push_back (port->name ());
1195 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1197 for (size_t i = 0; i < _ports.size (); ++i) {
1198 DummyPort* port = _ports[i];
1199 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1200 port_names.push_back (port->name ());
1206 DummyAudioBackend::n_physical_outputs () const
1210 for (size_t i = 0; i < _ports.size (); ++i) {
1211 DummyPort* port = _ports[i];
1212 if (port->is_output () && port->is_physical ()) {
1213 switch (port->type ()) {
1214 case DataType::AUDIO: ++n_audio; break;
1215 case DataType::MIDI: ++n_midi; break;
1221 cc.set (DataType::AUDIO, n_audio);
1222 cc.set (DataType::MIDI, n_midi);
1227 DummyAudioBackend::n_physical_inputs () const
1231 for (size_t i = 0; i < _ports.size (); ++i) {
1232 DummyPort* port = _ports[i];
1233 if (port->is_input () && port->is_physical ()) {
1234 switch (port->type ()) {
1235 case DataType::AUDIO: ++n_audio; break;
1236 case DataType::MIDI: ++n_midi; break;
1242 cc.set (DataType::AUDIO, n_audio);
1243 cc.set (DataType::MIDI, n_midi);
1247 /* Getting access to the data buffer for a port */
1250 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1253 assert (valid_port (port));
1254 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1257 /* Engine Process */
1259 DummyAudioBackend::main_process_thread ()
1261 AudioEngine::thread_init_callback (this);
1263 _processed_samples = 0;
1265 manager.registration_callback();
1266 manager.graph_order_callback();
1272 if (_freewheeling != _freewheel) {
1273 _freewheel = _freewheeling;
1274 engine.freewheel_callback (_freewheel);
1277 // re-set input buffers, generate on demand.
1278 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1279 (*it)->next_period();
1281 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1282 (*it)->next_period();
1285 if (engine.process_callback (_samples_per_period)) {
1288 _processed_samples += _samples_per_period;
1290 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1292 int opc = _system_outputs.size();
1293 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1294 DummyAudioPort* op = _system_outputs[(opn % opc)];
1295 (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
1299 if (_midi_mode == MidiLoopback) {
1301 int opc = _system_midi_out.size();
1302 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1303 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1304 op->get_buffer(0); // mix-down
1305 (*it)->set_loopback (op->const_buffer());
1308 else if (_midi_mode == MidiToAudio) {
1310 int opc = _system_midi_out.size();
1311 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1312 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1313 op->get_buffer(0); // mix-down
1314 (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
1319 _dsp_load_calc.set_start_timestamp_us (clock1);
1320 _dsp_load_calc.set_stop_timestamp_us (_x_get_monotonic_usec());
1321 _dsp_load = _dsp_load_calc.get_dsp_load_unbound ();
1323 const int64_t elapsed_time = _dsp_load_calc.elapsed_time_us ();
1324 const int64_t nominal_time = _dsp_load_calc.get_max_time_us ();
1325 if (elapsed_time < nominal_time) {
1326 const int64_t sleepy = _speedup * (nominal_time - elapsed_time);
1327 Glib::usleep (std::max ((int64_t) 100, sleepy));
1329 Glib::usleep (100); // don't hog cpu
1333 Glib::usleep (100); // don't hog cpu
1336 /* beginning of next cycle */
1337 clock1 = _x_get_monotonic_usec();
1339 bool connections_changed = false;
1340 bool ports_changed = false;
1341 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1342 if (_port_change_flag) {
1343 ports_changed = true;
1344 _port_change_flag = false;
1346 if (!_port_connection_queue.empty ()) {
1347 connections_changed = true;
1349 while (!_port_connection_queue.empty ()) {
1350 PortConnectData *c = _port_connection_queue.back ();
1351 manager.connect_callback (c->a, c->b, c->c);
1352 _port_connection_queue.pop_back ();
1355 pthread_mutex_unlock (&_port_callback_mutex);
1357 if (ports_changed) {
1358 manager.registration_callback();
1360 if (connections_changed) {
1361 manager.graph_order_callback();
1363 if (connections_changed || ports_changed) {
1364 engine.latency_callback(false);
1365 engine.latency_callback(true);
1374 /******************************************************************************/
1376 static boost::shared_ptr<DummyAudioBackend> _instance;
1378 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1379 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1380 static int deinstantiate ();
1381 static bool already_configured ();
1382 static bool available ();
1384 static ARDOUR::AudioBackendInfo _descriptor = {
1393 static boost::shared_ptr<AudioBackend>
1394 backend_factory (AudioEngine& e)
1397 _instance.reset (new DummyAudioBackend (e, _descriptor));
1403 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1405 s_instance_name = arg1;
1417 already_configured ()
1419 // special-case: unit-tests require backend to be pre-configured.
1420 if (s_instance_name == "Unit-Test") {
1432 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1434 return &_descriptor;
1438 /******************************************************************************/
1439 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1440 : _dummy_backend (b)
1444 , _gen_cycle (false)
1446 _capture_latency_range.min = 0;
1447 _capture_latency_range.max = 0;
1448 _playback_latency_range.min = 0;
1449 _playback_latency_range.max = 0;
1450 _dummy_backend.port_connect_add_remove_callback();
1453 DummyPort::~DummyPort () {
1455 _dummy_backend.port_connect_add_remove_callback();
1459 int DummyPort::connect (DummyPort *port)
1462 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1466 if (type () != port->type ()) {
1467 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1471 if (is_output () && port->is_output ()) {
1472 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1476 if (is_input () && port->is_input ()) {
1477 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1482 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1486 if (is_connected (port)) {
1487 #if 0 // don't bother to warn about this for now. just ignore it
1488 PBD::error << _("DummyPort::connect (): ports are already connected:")
1489 << " (" << name () << ") -> (" << port->name () << ")"
1495 _connect (port, true);
1500 void DummyPort::_connect (DummyPort *port, bool callback)
1502 _connections.push_back (port);
1504 port->_connect (this, false);
1505 _dummy_backend.port_connect_callback (name(), port->name(), true);
1509 int DummyPort::disconnect (DummyPort *port)
1512 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1516 if (!is_connected (port)) {
1517 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1518 << " (" << name () << ") -> (" << port->name () << ")"
1522 _disconnect (port, true);
1526 void DummyPort::_disconnect (DummyPort *port, bool callback)
1528 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1530 assert (it != _connections.end ());
1532 _connections.erase (it);
1535 port->_disconnect (this, false);
1536 _dummy_backend.port_connect_callback (name(), port->name(), false);
1541 void DummyPort::disconnect_all ()
1543 while (!_connections.empty ()) {
1544 _connections.back ()->_disconnect (this, false);
1545 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1546 _connections.pop_back ();
1551 DummyPort::is_connected (const DummyPort *port) const
1553 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1556 bool DummyPort::is_physically_connected () const
1558 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1559 if ((*it)->is_physical ()) {
1566 void DummyPort::setup_random_number_generator ()
1568 #ifdef PLATFORM_WINDOWS
1569 LARGE_INTEGER Count;
1570 if (QueryPerformanceCounter (&Count)) {
1571 _rseed = Count.QuadPart % UINT_MAX;
1575 _rseed = g_get_monotonic_time() % UINT_MAX;
1577 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1578 if (_rseed == 0) _rseed = 1;
1584 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1585 // http://www.firstpr.com.au/dsp/rand31/
1587 lo = 16807 * (_rseed & 0xffff);
1588 hi = 16807 * (_rseed >> 16);
1590 lo += (hi & 0x7fff) << 16;
1593 lo = (lo & 0x7fffffff) + (lo >> 31);
1595 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1597 return (_rseed = lo);
1603 return (randi() / 1073741824.f) - 1.f;
1606 /******************************************************************************/
1608 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1609 : DummyPort (b, name, flags)
1610 , _gen_type (Silence)
1626 memset (_buffer, 0, sizeof (_buffer));
1629 DummyAudioPort::~DummyAudioPort () {
1634 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1636 DummyPort::setup_random_number_generator();
1639 switch (_gen_type) {
1642 case UniformWhiteNoise:
1643 case GaussianWhiteNoise:
1647 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1650 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1653 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1654 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1655 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1656 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1660 case SquareSweepSwell:
1662 case SineSweepSwell:
1664 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1666 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1667 const double f_min = 20.;
1668 const double f_max = samplerate * .5;
1669 const double g_p2 = _gen_period * .5;
1671 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1672 const double a = f_min / samplerate;
1674 const double b = log (f_max / f_min) / g_p2;
1675 const double a = f_min / (b * samplerate);
1677 const uint32_t g_p2i = rint(g_p2);
1678 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1679 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1681 const double phase = i * (a + b * i);
1683 const double phase = a * exp (b * i) - a;
1685 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1687 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1688 const uint32_t j = _gen_period - i;
1690 const double phase = j * (a + b * j);
1692 const double phase = a * exp (b * j) - a;
1694 _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
1696 if (_gen_type == SquareSweep) {
1697 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1698 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1701 else if (_gen_type == SquareSweepSwell) {
1702 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1703 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1709 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1714 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1716 memset(_wavetable, 0, n_samples * sizeof(float));
1717 /* generate an audio spike for every midi message
1718 * to verify layency-compensation alignment
1719 * (here: midi-out playback-latency + audio-in capture-latency)
1721 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1722 const pframes_t t = (*it)->timestamp();
1723 assert(t < n_samples);
1724 // somewhat arbitrary mapping for quick visual feedback
1726 if ((*it)->size() == 3) {
1727 const unsigned char *d = (*it)->const_data();
1728 if ((d[0] & 0xf0) == 0x90) { // note on
1729 v = .25f + d[2] / 512.f;
1731 else if ((d[0] & 0xf0) == 0x80) { // note off
1732 v = .3f - d[2] / 640.f;
1734 else if ((d[0] & 0xf0) == 0xb0) { // CC
1735 v = -.1f - d[2] / 256.f;
1742 float DummyAudioPort::grandf ()
1744 // Gaussian White Noise
1745 // http://www.musicdsp.org/archive.php?classid=0#109
1756 r = x1 * x1 + x2 * x2;
1757 } while ((r >= 1.0f) || (r < 1e-22f));
1759 r = sqrtf (-2.f * logf (r) / r);
1766 void DummyAudioPort::generate (const pframes_t n_samples)
1768 Glib::Threads::Mutex::Lock lm (generator_lock);
1773 switch (_gen_type) {
1775 memset (_buffer, 0, n_samples * sizeof (Sample));
1778 assert(_gen_period > 0);
1779 for (pframes_t i = 0 ; i < n_samples; ++i) {
1780 if (_gen_offset < _gen_period * .5f) {
1781 _buffer[i] = .40709f; // -6dBFS
1783 _buffer[i] = -.40709f;
1785 _gen_offset = (_gen_offset + 1) % _gen_period;
1789 assert(_gen_period > 0);
1790 memset (_buffer, 0, n_samples * sizeof (Sample));
1791 for (pframes_t i = 0; i < n_samples; ++i) {
1792 if (_gen_offset == 0) {
1795 _gen_offset = (_gen_offset + 1) % _gen_period;
1798 case SineSweepSwell:
1799 case SquareSweepSwell:
1800 assert(_wavetable && _gen_period > 0);
1802 const float vols = 2.f / (float)_gen_perio2;
1803 for (pframes_t i = 0; i < n_samples; ++i) {
1804 const float g = fabsf (_gen_count2 * vols - 1.f);
1805 _buffer[i] = g * _wavetable[_gen_offset];
1806 _gen_offset = (_gen_offset + 1) % _gen_period;
1807 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1812 _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
1816 assert(_wavetable && _gen_period > 0);
1818 pframes_t written = 0;
1819 while (written < n_samples) {
1820 const uint32_t remain = n_samples - written;
1821 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
1822 memcpy((void*)&_buffer[written],
1823 (void*)&_wavetable[_gen_offset],
1824 to_copy * sizeof(Sample));
1826 _gen_offset = (_gen_offset + to_copy) % _gen_period;
1830 case UniformWhiteNoise:
1831 for (pframes_t i = 0 ; i < n_samples; ++i) {
1832 _buffer[i] = .158489f * randf();
1835 case GaussianWhiteNoise:
1836 for (pframes_t i = 0 ; i < n_samples; ++i) {
1837 _buffer[i] = .089125f * grandf();
1841 for (pframes_t i = 0 ; i < n_samples; ++i) {
1842 // Paul Kellet's refined method
1843 // http://www.musicdsp.org/files/pink.txt
1844 // NB. If 'white' consists of uniform random numbers,
1845 // the pink noise will have an almost gaussian distribution.
1846 const float white = .0498f * randf ();
1847 _b0 = .99886f * _b0 + white * .0555179f;
1848 _b1 = .99332f * _b1 + white * .0750759f;
1849 _b2 = .96900f * _b2 + white * .1538520f;
1850 _b3 = .86650f * _b3 + white * .3104856f;
1851 _b4 = .55000f * _b4 + white * .5329522f;
1852 _b5 = -.7616f * _b5 - white * .0168980f;
1853 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
1854 _b6 = white * 0.115926f;
1858 for (pframes_t i = 0 ; i < n_samples; ++i) {
1859 const float white = 0.0498f * randf ();
1860 // Paul Kellet's economy method
1861 // http://www.musicdsp.org/files/pink.txt
1862 _b0 = 0.99765f * _b0 + white * 0.0990460f;
1863 _b1 = 0.96300f * _b1 + white * 0.2965164f;
1864 _b2 = 0.57000f * _b2 + white * 1.0526913f;
1865 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
1872 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1875 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1876 if (it == get_connections ().end ()) {
1877 memset (_buffer, 0, n_samples * sizeof (Sample));
1879 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1880 assert (source && source->is_output ());
1881 if (source->is_physical() && source->is_terminal()) {
1882 source->get_buffer(n_samples); // generate signal.
1884 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1885 while (++it != get_connections ().end ()) {
1886 source = static_cast<DummyAudioPort*>(*it);
1887 assert (source && source->is_output ());
1888 Sample* dst = buffer ();
1889 if (source->is_physical() && source->is_terminal()) {
1890 source->get_buffer(n_samples); // generate signal.
1892 const Sample* src = source->const_buffer ();
1893 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1898 } else if (is_output () && is_physical () && is_terminal()) {
1900 generate(n_samples);
1907 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1908 : DummyPort (b, name, flags)
1910 , _midi_seq_time (0)
1917 DummyMidiPort::~DummyMidiPort () {
1922 struct MidiEventSorter {
1923 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1928 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
1931 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1932 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1936 void DummyMidiPort::setup_generator (int seq_id, const float sr)
1938 DummyPort::setup_random_number_generator();
1939 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
1940 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
1945 void DummyMidiPort::midi_generate (const pframes_t n_samples)
1947 Glib::Threads::Mutex::Lock lm (generator_lock);
1955 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
1956 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
1957 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1963 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
1964 if (ev_beat_time < 0) {
1967 if ((pframes_t) ev_beat_time >= n_samples) {
1970 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
1972 _midi_seq_dat[_midi_seq_pos].event,
1973 _midi_seq_dat[_midi_seq_pos].size
1977 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
1978 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
1982 _midi_seq_time += n_samples;
1986 void* DummyMidiPort::get_buffer (pframes_t n_samples)
1990 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1991 i != get_connections ().end ();
1993 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
1994 if (source->is_physical() && source->is_terminal()) {
1995 source->get_buffer(n_samples); // generate signal.
1997 const DummyMidiBuffer *src = source->const_buffer ();
1998 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1999 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2002 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
2003 } else if (is_output () && is_physical () && is_terminal()) {
2005 midi_generate(n_samples);
2011 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2013 , _timestamp (timestamp)
2017 _data = (uint8_t*) malloc (size);
2018 memcpy (_data, data, size);
2022 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
2023 : _size (other.size ())
2024 , _timestamp (other.timestamp ())
2027 if (other.size () && other.const_data ()) {
2028 _data = (uint8_t*) malloc (other.size ());
2029 memcpy (_data, other.const_data (), other.size ());
2033 DummyMidiEvent::~DummyMidiEvent () {