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;
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;
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;
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;
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 ();
662 PortEngine::PortHandle
663 DummyAudioBackend::get_port_by_name (const std::string& name) const
665 PortHandle port = (PortHandle) find_port (name);
670 DummyAudioBackend::get_ports (
671 const std::string& port_name_pattern,
672 DataType type, PortFlags flags,
673 std::vector<std::string>& port_names) const
677 bool use_regexp = false;
678 if (port_name_pattern.size () > 0) {
679 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
683 for (size_t i = 0; i < _ports.size (); ++i) {
684 DummyPort* port = _ports[i];
685 if ((port->type () == type) && flags == (port->flags () & flags)) {
686 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
687 port_names.push_back (port->name ());
693 regfree (&port_regex);
699 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
701 if (!valid_port (port)) {
702 return DataType::NIL;
704 return static_cast<DummyPort*>(port)->type ();
707 PortEngine::PortHandle
708 DummyAudioBackend::register_port (
709 const std::string& name,
710 ARDOUR::DataType type,
711 ARDOUR::PortFlags flags)
713 if (name.size () == 0) { return 0; }
714 if (flags & IsPhysical) { return 0; }
716 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
718 return add_port (_instance_name + ":" + name, type, flags);
721 PortEngine::PortHandle
722 DummyAudioBackend::add_port (
723 const std::string& name,
724 ARDOUR::DataType type,
725 ARDOUR::PortFlags flags)
727 assert(name.size ());
728 if (find_port (name)) {
729 PBD::error << _("DummyBackend::register_port: Port already exists:")
730 << " (" << name << ")" << endmsg;
733 DummyPort* port = NULL;
735 case DataType::AUDIO:
736 port = new DummyAudioPort (*this, name, flags);
739 port = new DummyMidiPort (*this, name, flags);
742 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
746 _ports.push_back (port);
752 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
755 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
756 assert (!valid_port (port_handle));
759 DummyPort* port = static_cast<DummyPort*>(port_handle);
760 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
761 if (i == _ports.end ()) {
762 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
765 disconnect_all(port_handle);
771 DummyAudioBackend::register_system_ports()
774 enum DummyAudioPort::GeneratorType gt;
775 if (_device == _("Uniform White Noise")) {
776 gt = DummyAudioPort::UniformWhiteNoise;
777 } else if (_device == _("Gaussian White Noise")) {
778 gt = DummyAudioPort::GaussianWhiteNoise;
779 } else if (_device == _("Pink Noise")) {
780 gt = DummyAudioPort::PinkNoise;
781 } else if (_device == _("Pink Noise (low CPU)")) {
782 gt = DummyAudioPort::PonyNoise;
783 } else if (_device == _("Sine Wave")) {
784 gt = DummyAudioPort::SineWave;
785 } else if (_device == _("Square Wave")) {
786 gt = DummyAudioPort::SquareWave;
787 } else if (_device == _("Impulses")) {
788 gt = DummyAudioPort::KronekerDelta;
789 } else if (_device == _("Sine Sweep")) {
790 gt = DummyAudioPort::SineSweep;
791 } else if (_device == _("Sine Sweep Swell")) {
792 gt = DummyAudioPort::SineSweepSwell;
793 } else if (_device == _("Square Sweep")) {
794 gt = DummyAudioPort::SquareSweep;
795 } else if (_device == _("Square Sweep Swell")) {
796 gt = DummyAudioPort::SquareSweepSwell;
797 } else if (_device == _("Loopback")) {
798 gt = DummyAudioPort::Loopback;
800 gt = DummyAudioPort::Silence;
803 if (_midi_mode == MidiToAudio) {
804 gt = DummyAudioPort::Loopback;
807 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
808 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
809 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
810 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
814 lr.min = lr.max = _systemic_input_latency;
815 for (int i = 1; i <= a_ins; ++i) {
817 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
818 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
820 set_latency_range (p, false, lr);
821 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
822 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
825 lr.min = lr.max = _systemic_output_latency;
826 for (int i = 1; i <= a_out; ++i) {
828 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
829 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
831 set_latency_range (p, true, lr);
832 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
836 lr.min = lr.max = _systemic_input_latency;
837 for (int i = 0; i < m_ins; ++i) {
839 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
840 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
842 set_latency_range (p, false, lr);
843 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
844 if (_midi_mode == MidiGenerator) {
845 static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
849 lr.min = lr.max = _systemic_output_latency;
850 for (int i = 1; i <= m_out; ++i) {
852 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
853 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
855 set_latency_range (p, true, lr);
856 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
862 DummyAudioBackend::unregister_ports (bool system_only)
864 _system_inputs.clear();
865 _system_outputs.clear();
866 _system_midi_in.clear();
867 _system_midi_out.clear();
869 for (std::vector<DummyPort*>::iterator i = _ports.begin (); i != _ports.end ();) {
870 DummyPort* port = *i;
871 if (! system_only || (port->is_physical () && port->is_terminal ())) {
872 port->disconnect_all ();
874 i = _ports.erase (i);
882 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
884 DummyPort* src_port = find_port (src);
885 DummyPort* dst_port = find_port (dst);
888 PBD::error << _("DummyBackend::connect: Invalid Source port:")
889 << " (" << src <<")" << endmsg;
893 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
894 << " (" << dst <<")" << endmsg;
897 return src_port->connect (dst_port);
901 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
903 DummyPort* src_port = find_port (src);
904 DummyPort* dst_port = find_port (dst);
906 if (!src_port || !dst_port) {
907 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
910 return src_port->disconnect (dst_port);
914 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
916 DummyPort* dst_port = find_port (dst);
917 if (!valid_port (src)) {
918 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
922 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
923 << " (" << dst << ")" << endmsg;
926 return static_cast<DummyPort*>(src)->connect (dst_port);
930 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
932 DummyPort* dst_port = find_port (dst);
933 if (!valid_port (src) || !dst_port) {
934 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
937 return static_cast<DummyPort*>(src)->disconnect (dst_port);
941 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
943 if (!valid_port (port)) {
944 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
947 static_cast<DummyPort*>(port)->disconnect_all ();
952 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
954 if (!valid_port (port)) {
955 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
958 return static_cast<DummyPort*>(port)->is_connected ();
962 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
964 DummyPort* dst_port = find_port (dst);
965 if (!valid_port (src) || !dst_port) {
966 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
969 return static_cast<DummyPort*>(src)->is_connected (dst_port);
973 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
975 if (!valid_port (port)) {
976 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
979 return static_cast<DummyPort*>(port)->is_physically_connected ();
983 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
985 if (!valid_port (port)) {
986 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
990 assert (0 == names.size ());
992 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
994 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
995 names.push_back ((*i)->name ());
998 return (int)names.size ();
1003 DummyAudioBackend::midi_event_get (
1004 pframes_t& timestamp,
1005 size_t& size, uint8_t** buf, void* port_buffer,
1006 uint32_t event_index)
1008 assert (buf && port_buffer);
1009 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
1010 if (event_index >= source.size ()) {
1013 DummyMidiEvent * const event = source[event_index].get ();
1015 timestamp = event->timestamp ();
1016 size = event->size ();
1017 *buf = event->data ();
1022 DummyAudioBackend::midi_event_put (
1024 pframes_t timestamp,
1025 const uint8_t* buffer, size_t size)
1027 assert (buffer && port_buffer);
1028 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
1029 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1030 // nevermind, ::get_buffer() sorts events, but always print warning
1031 fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
1033 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
1038 DummyAudioBackend::get_midi_event_count (void* port_buffer)
1040 assert (port_buffer);
1041 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1045 DummyAudioBackend::midi_clear (void* port_buffer)
1047 assert (port_buffer);
1048 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1056 DummyAudioBackend::can_monitor_input () const
1062 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1068 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1074 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1079 /* Latency management */
1082 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1084 if (!valid_port (port)) {
1085 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1087 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1091 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1094 if (!valid_port (port)) {
1095 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1100 DummyPort *p = static_cast<DummyPort*>(port);
1103 r = p->latency_range (for_playback);
1104 if (p->is_physical() && p->is_terminal()) {
1105 if (p->is_input() && for_playback) {
1106 const size_t l_in = _samples_per_period * .25;
1110 if (p->is_output() && !for_playback) {
1111 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1112 const size_t l_in = _samples_per_period * .25;
1113 const size_t l_out = _samples_per_period - l_in;
1121 /* Discovering physical ports */
1124 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1126 if (!valid_port (port)) {
1127 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1130 return static_cast<DummyPort*>(port)->is_physical ();
1134 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1136 for (size_t i = 0; i < _ports.size (); ++i) {
1137 DummyPort* port = _ports[i];
1138 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1139 port_names.push_back (port->name ());
1145 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1147 for (size_t i = 0; i < _ports.size (); ++i) {
1148 DummyPort* port = _ports[i];
1149 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1150 port_names.push_back (port->name ());
1156 DummyAudioBackend::n_physical_outputs () const
1160 for (size_t i = 0; i < _ports.size (); ++i) {
1161 DummyPort* port = _ports[i];
1162 if (port->is_output () && port->is_physical ()) {
1163 switch (port->type ()) {
1164 case DataType::AUDIO: ++n_audio; break;
1165 case DataType::MIDI: ++n_midi; break;
1171 cc.set (DataType::AUDIO, n_audio);
1172 cc.set (DataType::MIDI, n_midi);
1177 DummyAudioBackend::n_physical_inputs () const
1181 for (size_t i = 0; i < _ports.size (); ++i) {
1182 DummyPort* port = _ports[i];
1183 if (port->is_input () && port->is_physical ()) {
1184 switch (port->type ()) {
1185 case DataType::AUDIO: ++n_audio; break;
1186 case DataType::MIDI: ++n_midi; break;
1192 cc.set (DataType::AUDIO, n_audio);
1193 cc.set (DataType::MIDI, n_midi);
1197 /* Getting access to the data buffer for a port */
1200 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1203 assert (valid_port (port));
1204 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1207 /* Engine Process */
1209 DummyAudioBackend::main_process_thread ()
1211 AudioEngine::thread_init_callback (this);
1213 _processed_samples = 0;
1215 manager.registration_callback();
1216 manager.graph_order_callback();
1222 if (_freewheeling != _freewheel) {
1223 _freewheel = _freewheeling;
1224 engine.freewheel_callback (_freewheel);
1227 // re-set input buffers, generate on demand.
1228 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1229 (*it)->next_period();
1231 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1232 (*it)->next_period();
1235 if (engine.process_callback (_samples_per_period)) {
1238 _processed_samples += _samples_per_period;
1240 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1242 int opc = _system_outputs.size();
1243 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1244 DummyAudioPort* op = _system_outputs[(opn % opc)];
1245 (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
1249 if (_midi_mode == MidiLoopback) {
1251 int opc = _system_midi_out.size();
1252 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1253 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1254 op->get_buffer(0); // mix-down
1255 (*it)->set_loopback (op->const_buffer());
1258 else if (_midi_mode == MidiToAudio) {
1260 int opc = _system_midi_out.size();
1261 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1262 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1263 op->get_buffer(0); // mix-down
1264 (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
1269 _dsp_load_calc.set_start_timestamp_us (clock1);
1270 _dsp_load_calc.set_stop_timestamp_us (_x_get_monotonic_usec());
1271 _dsp_load = _dsp_load_calc.get_dsp_load_unbound ();
1273 const int64_t elapsed_time = _dsp_load_calc.elapsed_time_us ();
1274 const int64_t nominal_time = _dsp_load_calc.get_max_time_us ();
1275 if (elapsed_time < nominal_time) {
1276 const int64_t sleepy = _speedup * (nominal_time - elapsed_time);
1277 Glib::usleep (std::max ((int64_t) 100, sleepy));
1279 Glib::usleep (100); // don't hog cpu
1283 Glib::usleep (100); // don't hog cpu
1286 /* beginning of next cycle */
1287 clock1 = _x_get_monotonic_usec();
1289 bool connections_changed = false;
1290 bool ports_changed = false;
1291 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1292 if (_port_change_flag) {
1293 ports_changed = true;
1294 _port_change_flag = false;
1296 if (!_port_connection_queue.empty ()) {
1297 connections_changed = true;
1299 while (!_port_connection_queue.empty ()) {
1300 PortConnectData *c = _port_connection_queue.back ();
1301 manager.connect_callback (c->a, c->b, c->c);
1302 _port_connection_queue.pop_back ();
1305 pthread_mutex_unlock (&_port_callback_mutex);
1307 if (ports_changed) {
1308 manager.registration_callback();
1310 if (connections_changed) {
1311 manager.graph_order_callback();
1313 if (connections_changed || ports_changed) {
1314 engine.latency_callback(false);
1315 engine.latency_callback(true);
1324 /******************************************************************************/
1326 static boost::shared_ptr<DummyAudioBackend> _instance;
1328 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1329 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1330 static int deinstantiate ();
1331 static bool already_configured ();
1332 static bool available ();
1334 static ARDOUR::AudioBackendInfo _descriptor = {
1343 static boost::shared_ptr<AudioBackend>
1344 backend_factory (AudioEngine& e)
1347 _instance.reset (new DummyAudioBackend (e, _descriptor));
1353 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1355 s_instance_name = arg1;
1367 already_configured ()
1369 // special-case: unit-tests require backend to be pre-configured.
1370 if (s_instance_name == "Unit-Test") {
1382 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1384 return &_descriptor;
1388 /******************************************************************************/
1389 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1390 : _dummy_backend (b)
1394 , _gen_cycle (false)
1396 _capture_latency_range.min = 0;
1397 _capture_latency_range.max = 0;
1398 _playback_latency_range.min = 0;
1399 _playback_latency_range.max = 0;
1400 _dummy_backend.port_connect_add_remove_callback();
1403 DummyPort::~DummyPort () {
1405 _dummy_backend.port_connect_add_remove_callback();
1409 int DummyPort::connect (DummyPort *port)
1412 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1416 if (type () != port->type ()) {
1417 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1421 if (is_output () && port->is_output ()) {
1422 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1426 if (is_input () && port->is_input ()) {
1427 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1432 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1436 if (is_connected (port)) {
1437 #if 0 // don't bother to warn about this for now. just ignore it
1438 PBD::error << _("DummyPort::connect (): ports are already connected:")
1439 << " (" << name () << ") -> (" << port->name () << ")"
1445 _connect (port, true);
1450 void DummyPort::_connect (DummyPort *port, bool callback)
1452 _connections.push_back (port);
1454 port->_connect (this, false);
1455 _dummy_backend.port_connect_callback (name(), port->name(), true);
1459 int DummyPort::disconnect (DummyPort *port)
1462 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1466 if (!is_connected (port)) {
1467 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1468 << " (" << name () << ") -> (" << port->name () << ")"
1472 _disconnect (port, true);
1476 void DummyPort::_disconnect (DummyPort *port, bool callback)
1478 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1480 assert (it != _connections.end ());
1482 _connections.erase (it);
1485 port->_disconnect (this, false);
1486 _dummy_backend.port_connect_callback (name(), port->name(), false);
1491 void DummyPort::disconnect_all ()
1493 while (!_connections.empty ()) {
1494 _connections.back ()->_disconnect (this, false);
1495 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1496 _connections.pop_back ();
1501 DummyPort::is_connected (const DummyPort *port) const
1503 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1506 bool DummyPort::is_physically_connected () const
1508 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1509 if ((*it)->is_physical ()) {
1516 void DummyPort::setup_random_number_generator ()
1518 #ifdef PLATFORM_WINDOWS
1519 LARGE_INTEGER Count;
1520 if (QueryPerformanceCounter (&Count)) {
1521 _rseed = Count.QuadPart % UINT_MAX;
1525 _rseed = g_get_monotonic_time() % UINT_MAX;
1527 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1533 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1534 // http://www.firstpr.com.au/dsp/rand31/
1536 lo = 16807 * (_rseed & 0xffff);
1537 hi = 16807 * (_rseed >> 16);
1539 lo += (hi & 0x7fff) << 16;
1542 lo = (lo & 0x7fffffff) + (lo >> 31);
1544 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1546 return (_rseed = lo);
1552 return (randi() / 1073741824.f) - 1.f;
1555 /******************************************************************************/
1557 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1558 : DummyPort (b, name, flags)
1559 , _gen_type (Silence)
1575 memset (_buffer, 0, sizeof (_buffer));
1578 DummyAudioPort::~DummyAudioPort () {
1583 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1585 DummyPort::setup_random_number_generator();
1588 switch (_gen_type) {
1591 case UniformWhiteNoise:
1592 case GaussianWhiteNoise:
1596 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1599 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1602 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1603 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1604 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1605 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1609 case SquareSweepSwell:
1611 case SineSweepSwell:
1613 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1615 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1616 const double f_min = 20.;
1617 const double f_max = samplerate * .5;
1618 const double g_p2 = _gen_period * .5;
1620 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1621 const double a = f_min / samplerate;
1623 const double b = log (f_max / f_min) / g_p2;
1624 const double a = f_min / (b * samplerate);
1626 const uint32_t g_p2i = rint(g_p2);
1627 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1628 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1630 const double phase = i * (a + b * i);
1632 const double phase = a * exp (b * i) - a;
1634 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1636 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1637 const uint32_t j = _gen_period - i;
1639 const double phase = j * (a + b * j);
1641 const double phase = a * exp (b * j) - a;
1643 _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
1645 if (_gen_type == SquareSweep) {
1646 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1647 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1650 else if (_gen_type == SquareSweepSwell) {
1651 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1652 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1658 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1663 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1665 memset(_wavetable, 0, n_samples * sizeof(float));
1666 /* generate an audio spike for every midi message
1667 * to verify layency-compensation alignment
1668 * (here: midi-out playback-latency + audio-in capture-latency)
1670 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1671 const pframes_t t = (*it)->timestamp();
1672 assert(t < n_samples);
1673 // somewhat arbitrary mapping for quick visual feedback
1675 if ((*it)->size() == 3) {
1676 const unsigned char *d = (*it)->const_data();
1677 if ((d[0] & 0xf0) == 0x90) { // note on
1678 v = .25f + d[2] / 512.f;
1680 else if ((d[0] & 0xf0) == 0x80) { // note off
1681 v = .3f - d[2] / 640.f;
1683 else if ((d[0] & 0xf0) == 0xb0) { // CC
1684 v = -.1f - d[2] / 256.f;
1691 float DummyAudioPort::grandf ()
1693 // Gaussian White Noise
1694 // http://www.musicdsp.org/archive.php?classid=0#109
1705 r = x1 * x1 + x2 * x2;
1706 } while ((r >= 1.0f) || (r < 1e-22f));
1708 r = sqrtf (-2.f * logf (r) / r);
1715 void DummyAudioPort::generate (const pframes_t n_samples)
1717 Glib::Threads::Mutex::Lock lm (generator_lock);
1722 switch (_gen_type) {
1724 memset (_buffer, 0, n_samples * sizeof (Sample));
1727 assert(_gen_period > 0);
1728 for (pframes_t i = 0 ; i < n_samples; ++i) {
1729 if (_gen_offset < _gen_period * .5f) {
1730 _buffer[i] = .40709f; // -6dBFS
1732 _buffer[i] = -.40709f;
1734 _gen_offset = (_gen_offset + 1) % _gen_period;
1738 assert(_gen_period > 0);
1739 memset (_buffer, 0, n_samples * sizeof (Sample));
1740 for (pframes_t i = 0; i < n_samples; ++i) {
1741 if (_gen_offset == 0) {
1744 _gen_offset = (_gen_offset + 1) % _gen_period;
1747 case SineSweepSwell:
1748 case SquareSweepSwell:
1749 assert(_wavetable && _gen_period > 0);
1751 const float vols = 2.f / (float)_gen_perio2;
1752 for (pframes_t i = 0; i < n_samples; ++i) {
1753 const float g = fabsf (_gen_count2 * vols - 1.f);
1754 _buffer[i] = g * _wavetable[_gen_offset];
1755 _gen_offset = (_gen_offset + 1) % _gen_period;
1756 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1761 _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
1765 assert(_wavetable && _gen_period > 0);
1767 pframes_t written = 0;
1768 while (written < n_samples) {
1769 const uint32_t remain = n_samples - written;
1770 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
1771 memcpy((void*)&_buffer[written],
1772 (void*)&_wavetable[_gen_offset],
1773 to_copy * sizeof(Sample));
1775 _gen_offset = (_gen_offset + to_copy) % _gen_period;
1779 case UniformWhiteNoise:
1780 for (pframes_t i = 0 ; i < n_samples; ++i) {
1781 _buffer[i] = .158489f * randf();
1784 case GaussianWhiteNoise:
1785 for (pframes_t i = 0 ; i < n_samples; ++i) {
1786 _buffer[i] = .089125f * grandf();
1790 for (pframes_t i = 0 ; i < n_samples; ++i) {
1791 // Paul Kellet's refined method
1792 // http://www.musicdsp.org/files/pink.txt
1793 // NB. If 'white' consists of uniform random numbers,
1794 // the pink noise will have an almost gaussian distribution.
1795 const float white = .0498f * randf ();
1796 _b0 = .99886f * _b0 + white * .0555179f;
1797 _b1 = .99332f * _b1 + white * .0750759f;
1798 _b2 = .96900f * _b2 + white * .1538520f;
1799 _b3 = .86650f * _b3 + white * .3104856f;
1800 _b4 = .55000f * _b4 + white * .5329522f;
1801 _b5 = -.7616f * _b5 - white * .0168980f;
1802 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
1803 _b6 = white * 0.115926f;
1807 for (pframes_t i = 0 ; i < n_samples; ++i) {
1808 const float white = 0.0498f * randf ();
1809 // Paul Kellet's economy method
1810 // http://www.musicdsp.org/files/pink.txt
1811 _b0 = 0.99765f * _b0 + white * 0.0990460f;
1812 _b1 = 0.96300f * _b1 + white * 0.2965164f;
1813 _b2 = 0.57000f * _b2 + white * 1.0526913f;
1814 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
1821 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1824 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1825 if (it == get_connections ().end ()) {
1826 memset (_buffer, 0, n_samples * sizeof (Sample));
1828 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1829 assert (source && source->is_output ());
1830 if (source->is_physical() && source->is_terminal()) {
1831 source->get_buffer(n_samples); // generate signal.
1833 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1834 while (++it != get_connections ().end ()) {
1835 source = static_cast<DummyAudioPort*>(*it);
1836 assert (source && source->is_output ());
1837 Sample* dst = buffer ();
1838 if (source->is_physical() && source->is_terminal()) {
1839 source->get_buffer(n_samples); // generate signal.
1841 const Sample* src = source->const_buffer ();
1842 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1847 } else if (is_output () && is_physical () && is_terminal()) {
1849 generate(n_samples);
1856 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1857 : DummyPort (b, name, flags)
1859 , _midi_seq_time (0)
1866 DummyMidiPort::~DummyMidiPort () {
1871 struct MidiEventSorter {
1872 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1877 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
1880 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1881 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1885 void DummyMidiPort::setup_generator (int seq_id, const float sr)
1887 DummyPort::setup_random_number_generator();
1888 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
1889 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
1894 void DummyMidiPort::midi_generate (const pframes_t n_samples)
1896 Glib::Threads::Mutex::Lock lm (generator_lock);
1904 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
1905 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
1906 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1912 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
1913 if (ev_beat_time < 0) {
1916 if ((pframes_t) ev_beat_time >= n_samples) {
1919 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
1921 _midi_seq_dat[_midi_seq_pos].event,
1922 _midi_seq_dat[_midi_seq_pos].size
1926 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
1927 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
1931 _midi_seq_time += n_samples;
1935 void* DummyMidiPort::get_buffer (pframes_t n_samples)
1939 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1940 i != get_connections ().end ();
1942 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
1943 if (source->is_physical() && source->is_terminal()) {
1944 source->get_buffer(n_samples); // generate signal.
1946 const DummyMidiBuffer *src = source->const_buffer ();
1947 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1948 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1951 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1952 } else if (is_output () && is_physical () && is_terminal()) {
1954 midi_generate(n_samples);
1960 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1962 , _timestamp (timestamp)
1966 _data = (uint8_t*) malloc (size);
1967 memcpy (_data, data, size);
1971 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
1972 : _size (other.size ())
1973 , _timestamp (other.timestamp ())
1976 if (other.size () && other.const_data ()) {
1977 _data = (uint8_t*) malloc (other.size ());
1978 memcpy (_data, other.const_data (), other.size ());
1982 DummyMidiEvent::~DummyMidiEvent () {