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
30 #include "dummy_audiobackend.h"
31 #include "dummy_midi_seq.h"
33 #include "pbd/error.h"
34 #include "ardour/port_manager.h"
37 using namespace ARDOUR;
39 static std::string s_instance_name;
40 size_t DummyAudioBackend::_max_buffer_size = 8192;
41 std::vector<std::string> DummyAudioBackend::_midi_options;
42 std::vector<AudioBackend::DeviceStatus> DummyAudioBackend::_device_status;
44 #ifdef PLATFORM_WINDOWS
45 static double _win_pc_rate = 0; // usec per tick
48 static int64_t _x_get_monotonic_usec() {
49 #ifdef PLATFORM_WINDOWS
50 if (_win_pc_rate > 0) {
52 // not very reliable, but the only realistic way for sub milli-seconds
53 if (QueryPerformanceCounter (&Count)) {
54 return (int64_t) (Count.QuadPart * _win_pc_rate);
59 return g_get_monotonic_time();
62 DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
63 : AudioBackend (e, info)
66 , _freewheeling (false)
69 , _samples_per_period (1024)
75 , _midi_mode (MidiNoEvents)
76 , _systemic_input_latency (0)
77 , _systemic_output_latency (0)
78 , _processed_samples (0)
79 , _port_change_flag (false)
81 _instance_name = s_instance_name;
82 _device = _("Silence");
83 pthread_mutex_init (&_port_callback_mutex, 0);
86 DummyAudioBackend::~DummyAudioBackend ()
88 pthread_mutex_destroy (&_port_callback_mutex);
91 /* AUDIOBACKEND API */
94 DummyAudioBackend::name () const
100 DummyAudioBackend::is_realtime () const
105 std::vector<AudioBackend::DeviceStatus>
106 DummyAudioBackend::enumerate_devices () const
108 if (_device_status.empty()) {
109 _device_status.push_back (DeviceStatus (_("Silence"), true));
110 _device_status.push_back (DeviceStatus (_("Sine Wave"), true));
111 _device_status.push_back (DeviceStatus (_("Square Wave"), true));
112 _device_status.push_back (DeviceStatus (_("Impulses"), true));
113 _device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
114 _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
115 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
116 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
117 _device_status.push_back (DeviceStatus (_("Sine Sweep"), true));
118 _device_status.push_back (DeviceStatus (_("Sine Sweep Swell"), true));
119 _device_status.push_back (DeviceStatus (_("Square Sweep"), true));
120 _device_status.push_back (DeviceStatus (_("Square Sweep Swell"), true));
121 _device_status.push_back (DeviceStatus (_("Loopback"), true));
123 return _device_status;
127 DummyAudioBackend::available_sample_rates (const std::string&) const
129 std::vector<float> sr;
130 sr.push_back (8000.0);
131 sr.push_back (22050.0);
132 sr.push_back (24000.0);
133 sr.push_back (44100.0);
134 sr.push_back (48000.0);
135 sr.push_back (88200.0);
136 sr.push_back (96000.0);
137 sr.push_back (176400.0);
138 sr.push_back (192000.0);
142 std::vector<uint32_t>
143 DummyAudioBackend::available_buffer_sizes (const std::string&) const
145 std::vector<uint32_t> bs;
162 DummyAudioBackend::available_input_channel_count (const std::string&) const
168 DummyAudioBackend::available_output_channel_count (const std::string&) const
174 DummyAudioBackend::can_change_sample_rate_when_running () const
180 DummyAudioBackend::can_change_buffer_size_when_running () const
186 DummyAudioBackend::set_device_name (const std::string& d)
193 DummyAudioBackend::set_sample_rate (float sr)
195 if (sr <= 0) { return -1; }
197 engine.sample_rate_change (sr);
202 DummyAudioBackend::set_buffer_size (uint32_t bs)
204 if (bs <= 0 || bs >= _max_buffer_size) {
207 _samples_per_period = bs;
209 /* update port latencies
210 * with 'Loopback' there is exactly once cycle latency,
211 * divide it between In + Out;
214 lr.min = lr.max = _systemic_input_latency;
215 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
216 set_latency_range (*it, false, lr);
218 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
219 set_latency_range (*it, false, lr);
222 lr.min = lr.max = _systemic_output_latency;
223 for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
224 set_latency_range (*it, true, lr);
226 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
227 set_latency_range (*it, true, lr);
230 engine.buffer_size_change (bs);
235 DummyAudioBackend::set_interleaved (bool yn)
237 if (!yn) { return 0; }
242 DummyAudioBackend::set_input_channels (uint32_t cc)
249 DummyAudioBackend::set_output_channels (uint32_t cc)
256 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
258 _systemic_input_latency = sl;
263 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
265 _systemic_output_latency = sl;
269 /* Retrieving parameters */
271 DummyAudioBackend::device_name () const
277 DummyAudioBackend::sample_rate () const
283 DummyAudioBackend::buffer_size () const
285 return _samples_per_period;
289 DummyAudioBackend::interleaved () const
295 DummyAudioBackend::input_channels () const
301 DummyAudioBackend::output_channels () const
307 DummyAudioBackend::systemic_input_latency () const
309 return _systemic_input_latency;
313 DummyAudioBackend::systemic_output_latency () const
315 return _systemic_output_latency;
320 std::vector<std::string>
321 DummyAudioBackend::enumerate_midi_options () const
323 if (_midi_options.empty()) {
324 _midi_options.push_back (_("1 in, 1 out, Silence"));
325 _midi_options.push_back (_("2 in, 2 out, Silence"));
326 _midi_options.push_back (_("8 in, 8 out, Silence"));
327 _midi_options.push_back (_("Midi Event Generators"));
328 _midi_options.push_back (_("8 in, 8 out, Loopback"));
329 _midi_options.push_back (_("MIDI to Audio, Loopback"));
330 _midi_options.push_back (_("No MIDI I/O"));
332 return _midi_options;
336 DummyAudioBackend::set_midi_option (const std::string& opt)
338 _midi_mode = MidiNoEvents;
339 if (opt == _("1 in, 1 out, Silence")) {
340 _n_midi_inputs = _n_midi_outputs = 1;
342 else if (opt == _("2 in, 2 out, Silence")) {
343 _n_midi_inputs = _n_midi_outputs = 2;
345 else if (opt == _("8 in, 8 out, Silence")) {
346 _n_midi_inputs = _n_midi_outputs = 8;
348 else if (opt == _("Midi Event Generators")) {
349 _n_midi_inputs = _n_midi_outputs = NUM_MIDI_EVENT_GENERATORS;
350 _midi_mode = MidiGenerator;
352 else if (opt == _("8 in, 8 out, Loopback")) {
353 _n_midi_inputs = _n_midi_outputs = 8;
354 _midi_mode = MidiLoopback;
356 else if (opt == _("MIDI to Audio, Loopback")) {
357 _n_midi_inputs = _n_midi_outputs = UINT32_MAX;
358 _midi_mode = MidiToAudio;
361 _n_midi_inputs = _n_midi_outputs = 0;
367 DummyAudioBackend::midi_option () const
374 static void * pthread_process (void *arg)
376 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
377 d->main_process_thread ();
383 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
386 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
391 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
392 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
393 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
395 _system_inputs.clear();
396 _system_outputs.clear();
397 _system_midi_in.clear();
398 _system_midi_out.clear();
402 if (register_system_ports()) {
403 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
407 engine.sample_rate_change (_samplerate);
408 engine.buffer_size_change (_samples_per_period);
410 if (engine.reestablish_ports ()) {
411 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
416 engine.reconnect_ports ();
417 _port_change_flag = false;
419 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
420 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
424 while (!_running && --timeout > 0) { Glib::usleep (1000); }
426 if (timeout == 0 || !_running) {
427 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
435 DummyAudioBackend::stop ()
443 if (pthread_join (_main_thread, &status)) {
444 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
452 DummyAudioBackend::freewheel (bool onoff)
454 _freewheeling = onoff;
459 DummyAudioBackend::dsp_load () const
461 return 100.f * _dsp_load;
465 DummyAudioBackend::raw_buffer_size (DataType t)
468 case DataType::AUDIO:
469 return _samples_per_period * sizeof(Sample);
471 return _max_buffer_size; // XXX not really limited
478 DummyAudioBackend::sample_time ()
480 return _processed_samples;
484 DummyAudioBackend::sample_time_at_cycle_start ()
486 return _processed_samples;
490 DummyAudioBackend::samples_since_cycle_start ()
497 DummyAudioBackend::dummy_process_thread (void *arg)
499 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
500 boost::function<void ()> f = td->f;
507 DummyAudioBackend::create_process_thread (boost::function<void()> func)
511 size_t stacksize = 100000;
513 pthread_attr_init (&attr);
514 pthread_attr_setstacksize (&attr, stacksize);
515 ThreadData* td = new ThreadData (this, func, stacksize);
517 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
518 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
519 pthread_attr_destroy (&attr);
522 pthread_attr_destroy (&attr);
524 _threads.push_back (thread_id);
529 DummyAudioBackend::join_process_threads ()
533 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
536 if (pthread_join (*i, &status)) {
537 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
546 DummyAudioBackend::in_process_thread ()
548 if (pthread_equal (_main_thread, pthread_self()) != 0) {
552 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
554 if (pthread_equal (*i, pthread_self ()) != 0) {
562 DummyAudioBackend::process_thread_count ()
564 return _threads.size ();
568 DummyAudioBackend::update_latencies ()
570 // trigger latency callback in RT thread (locked graph)
571 port_connect_add_remove_callback();
577 DummyAudioBackend::private_handle () const
583 DummyAudioBackend::my_name () const
585 return _instance_name;
589 DummyAudioBackend::available () const
595 DummyAudioBackend::port_name_size () const
601 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
603 if (!valid_port (port)) {
604 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
607 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
611 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
613 if (!valid_port (port)) {
614 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
615 return std::string ();
617 return static_cast<DummyPort*>(port)->name ();
620 PortEngine::PortHandle
621 DummyAudioBackend::get_port_by_name (const std::string& name) const
623 PortHandle port = (PortHandle) find_port (name);
628 DummyAudioBackend::get_ports (
629 const std::string& port_name_pattern,
630 DataType type, PortFlags flags,
631 std::vector<std::string>& port_names) const
635 bool use_regexp = false;
636 if (port_name_pattern.size () > 0) {
637 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
641 for (size_t i = 0; i < _ports.size (); ++i) {
642 DummyPort* port = _ports[i];
643 if ((port->type () == type) && (port->flags () & flags)) {
644 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
645 port_names.push_back (port->name ());
651 regfree (&port_regex);
657 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
659 if (!valid_port (port)) {
660 return DataType::NIL;
662 return static_cast<DummyPort*>(port)->type ();
665 PortEngine::PortHandle
666 DummyAudioBackend::register_port (
667 const std::string& name,
668 ARDOUR::DataType type,
669 ARDOUR::PortFlags flags)
671 if (name.size () == 0) { return 0; }
672 if (flags & IsPhysical) { return 0; }
674 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
676 return add_port (_instance_name + ":" + name, type, flags);
679 PortEngine::PortHandle
680 DummyAudioBackend::add_port (
681 const std::string& name,
682 ARDOUR::DataType type,
683 ARDOUR::PortFlags flags)
685 assert(name.size ());
686 if (find_port (name)) {
687 PBD::error << _("DummyBackend::register_port: Port already exists:")
688 << " (" << name << ")" << endmsg;
691 DummyPort* port = NULL;
693 case DataType::AUDIO:
694 port = new DummyAudioPort (*this, name, flags);
697 port = new DummyMidiPort (*this, name, flags);
700 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
704 _ports.push_back (port);
710 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
713 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
714 assert (!valid_port (port_handle));
717 DummyPort* port = static_cast<DummyPort*>(port_handle);
718 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
719 if (i == _ports.end ()) {
720 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
723 disconnect_all(port_handle);
729 DummyAudioBackend::register_system_ports()
732 enum DummyAudioPort::GeneratorType gt;
733 if (_device == _("Uniform White Noise")) {
734 gt = DummyAudioPort::UniformWhiteNoise;
735 } else if (_device == _("Gaussian White Noise")) {
736 gt = DummyAudioPort::GaussianWhiteNoise;
737 } else if (_device == _("Pink Noise")) {
738 gt = DummyAudioPort::PinkNoise;
739 } else if (_device == _("Pink Noise (low CPU)")) {
740 gt = DummyAudioPort::PonyNoise;
741 } else if (_device == _("Sine Wave")) {
742 gt = DummyAudioPort::SineWave;
743 } else if (_device == _("Square Wave")) {
744 gt = DummyAudioPort::SquareWave;
745 } else if (_device == _("Impulses")) {
746 gt = DummyAudioPort::KronekerDelta;
747 } else if (_device == _("Sine Sweep")) {
748 gt = DummyAudioPort::SineSweep;
749 } else if (_device == _("Sine Sweep Swell")) {
750 gt = DummyAudioPort::SineSweepSwell;
751 } else if (_device == _("Square Sweep")) {
752 gt = DummyAudioPort::SquareSweep;
753 } else if (_device == _("Square Sweep Swell")) {
754 gt = DummyAudioPort::SquareSweepSwell;
755 } else if (_device == _("Loopback")) {
756 gt = DummyAudioPort::Loopback;
758 gt = DummyAudioPort::Silence;
761 if (_midi_mode == MidiToAudio) {
762 gt = DummyAudioPort::Loopback;
765 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
766 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
767 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
768 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
772 lr.min = lr.max = _systemic_input_latency;
773 for (int i = 1; i <= a_ins; ++i) {
775 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
776 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
778 set_latency_range (p, false, lr);
779 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
780 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
783 lr.min = lr.max = _systemic_output_latency;
784 for (int i = 1; i <= a_out; ++i) {
786 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
787 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
789 set_latency_range (p, true, lr);
790 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
794 lr.min = lr.max = _systemic_input_latency;
795 for (int i = 0; i < m_ins; ++i) {
797 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
798 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
800 set_latency_range (p, false, lr);
801 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
802 if (_midi_mode == MidiGenerator) {
803 static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
807 lr.min = lr.max = _systemic_output_latency;
808 for (int i = 1; i <= m_out; ++i) {
810 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
811 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
813 set_latency_range (p, true, lr);
814 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
820 DummyAudioBackend::unregister_ports (bool system_only)
822 _system_inputs.clear();
823 _system_outputs.clear();
824 _system_midi_in.clear();
825 _system_midi_out.clear();
827 for (std::vector<DummyPort*>::iterator i = _ports.begin (); i != _ports.end ();) {
828 DummyPort* port = *i;
829 if (! system_only || (port->is_physical () && port->is_terminal ())) {
830 port->disconnect_all ();
832 i = _ports.erase (i);
840 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
842 DummyPort* src_port = find_port (src);
843 DummyPort* dst_port = find_port (dst);
846 PBD::error << _("DummyBackend::connect: Invalid Source port:")
847 << " (" << src <<")" << endmsg;
851 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
852 << " (" << dst <<")" << endmsg;
855 return src_port->connect (dst_port);
859 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
861 DummyPort* src_port = find_port (src);
862 DummyPort* dst_port = find_port (dst);
864 if (!src_port || !dst_port) {
865 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
868 return src_port->disconnect (dst_port);
872 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
874 DummyPort* dst_port = find_port (dst);
875 if (!valid_port (src)) {
876 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
880 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
881 << " (" << dst << ")" << endmsg;
884 return static_cast<DummyPort*>(src)->connect (dst_port);
888 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
890 DummyPort* dst_port = find_port (dst);
891 if (!valid_port (src) || !dst_port) {
892 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
895 return static_cast<DummyPort*>(src)->disconnect (dst_port);
899 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
901 if (!valid_port (port)) {
902 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
905 static_cast<DummyPort*>(port)->disconnect_all ();
910 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
912 if (!valid_port (port)) {
913 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
916 return static_cast<DummyPort*>(port)->is_connected ();
920 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
922 DummyPort* dst_port = find_port (dst);
923 if (!valid_port (src) || !dst_port) {
924 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
927 return static_cast<DummyPort*>(src)->is_connected (dst_port);
931 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
933 if (!valid_port (port)) {
934 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
937 return static_cast<DummyPort*>(port)->is_physically_connected ();
941 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
943 if (!valid_port (port)) {
944 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
948 assert (0 == names.size ());
950 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
952 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
953 names.push_back ((*i)->name ());
956 return (int)names.size ();
961 DummyAudioBackend::midi_event_get (
962 pframes_t& timestamp,
963 size_t& size, uint8_t** buf, void* port_buffer,
964 uint32_t event_index)
966 assert (buf && port_buffer);
967 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
968 if (event_index >= source.size ()) {
971 DummyMidiEvent * const event = source[event_index].get ();
973 timestamp = event->timestamp ();
974 size = event->size ();
975 *buf = event->data ();
980 DummyAudioBackend::midi_event_put (
983 const uint8_t* buffer, size_t size)
985 assert (buffer && port_buffer);
986 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
987 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
988 // nevermind, ::get_buffer() sorts events, but always print warning
989 fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
991 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
996 DummyAudioBackend::get_midi_event_count (void* port_buffer)
998 assert (port_buffer);
999 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1003 DummyAudioBackend::midi_clear (void* port_buffer)
1005 assert (port_buffer);
1006 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1014 DummyAudioBackend::can_monitor_input () const
1020 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1026 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1032 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1037 /* Latency management */
1040 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1042 if (!valid_port (port)) {
1043 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1045 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1049 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1052 if (!valid_port (port)) {
1053 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1058 DummyPort *p = static_cast<DummyPort*>(port);
1061 r = p->latency_range (for_playback);
1062 if (p->is_physical() && p->is_terminal()) {
1063 if (p->is_input() && for_playback) {
1064 const size_t l_in = _samples_per_period * .25;
1068 if (p->is_output() && !for_playback) {
1069 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1070 const size_t l_in = _samples_per_period * .25;
1071 const size_t l_out = _samples_per_period - l_in;
1079 /* Discovering physical ports */
1082 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1084 if (!valid_port (port)) {
1085 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1088 return static_cast<DummyPort*>(port)->is_physical ();
1092 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1094 for (size_t i = 0; i < _ports.size (); ++i) {
1095 DummyPort* port = _ports[i];
1096 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1097 port_names.push_back (port->name ());
1103 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1105 for (size_t i = 0; i < _ports.size (); ++i) {
1106 DummyPort* port = _ports[i];
1107 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1108 port_names.push_back (port->name ());
1114 DummyAudioBackend::n_physical_outputs () const
1118 for (size_t i = 0; i < _ports.size (); ++i) {
1119 DummyPort* port = _ports[i];
1120 if (port->is_output () && port->is_physical ()) {
1121 switch (port->type ()) {
1122 case DataType::AUDIO: ++n_audio; break;
1123 case DataType::MIDI: ++n_midi; break;
1129 cc.set (DataType::AUDIO, n_audio);
1130 cc.set (DataType::MIDI, n_midi);
1135 DummyAudioBackend::n_physical_inputs () const
1139 for (size_t i = 0; i < _ports.size (); ++i) {
1140 DummyPort* port = _ports[i];
1141 if (port->is_input () && port->is_physical ()) {
1142 switch (port->type ()) {
1143 case DataType::AUDIO: ++n_audio; break;
1144 case DataType::MIDI: ++n_midi; break;
1150 cc.set (DataType::AUDIO, n_audio);
1151 cc.set (DataType::MIDI, n_midi);
1155 /* Getting access to the data buffer for a port */
1158 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1161 assert (valid_port (port));
1162 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1165 /* Engine Process */
1167 DummyAudioBackend::main_process_thread ()
1169 AudioEngine::thread_init_callback (this);
1171 _processed_samples = 0;
1173 manager.registration_callback();
1174 manager.graph_order_callback();
1176 int64_t clock1, clock2;
1177 clock1 = _x_get_monotonic_usec();
1180 if (_freewheeling != _freewheel) {
1181 _freewheel = _freewheeling;
1182 engine.freewheel_callback (_freewheel);
1185 // re-set input buffers, generate on demand.
1186 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1187 (*it)->next_period();
1189 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1190 (*it)->next_period();
1193 if (engine.process_callback (_samples_per_period)) {
1196 _processed_samples += _samples_per_period;
1198 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1200 int opc = _system_outputs.size();
1201 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1202 DummyAudioPort* op = _system_outputs[(opn % opc)];
1203 (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
1207 if (_midi_mode == MidiLoopback) {
1209 int opc = _system_midi_out.size();
1210 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1211 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1212 op->get_buffer(0); // mix-down
1213 (*it)->set_loopback (op->const_buffer());
1216 else if (_midi_mode == MidiToAudio) {
1218 int opc = _system_midi_out.size();
1219 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1220 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1221 op->get_buffer(0); // mix-down
1222 (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
1227 const int64_t nominal_time = 1e6 * _samples_per_period / _samplerate;
1228 clock2 = _x_get_monotonic_usec();
1229 #ifdef PLATFORM_WINDOWS
1230 bool win_timers_ok = true;
1231 /* querying the performance counter can fail occasionally (-1).
1232 * Also on some multi-core systems, timers are CPU specific and not
1233 * synchronized. We assume they differ more than a few milliseconds
1234 * (4 * nominal cycle time) and simply ignore cases where the
1235 * execution switches cores.
1237 if (clock1 < 0 || clock2 < 0 || (clock1 > clock2) || (clock2 - clock1) > 4 * nominal_time) {
1238 clock2 = clock1 = 0;
1239 win_timers_ok = false;
1242 const int64_t elapsed_time = clock2 - clock1;
1243 #ifdef PLATFORM_WINDOWS
1246 { // low pass filter
1247 const float load = elapsed_time / (float) nominal_time;
1248 if (load > _dsp_load) {
1251 const float a = .1 * _samples_per_period / _samplerate;
1252 _dsp_load = _dsp_load + a * (load - _dsp_load) + 1e-12;
1256 if (elapsed_time < nominal_time) {
1257 Glib::usleep (nominal_time - elapsed_time);
1259 Glib::usleep (100); // don't hog cpu
1263 Glib::usleep (100); // don't hog cpu
1266 /* beginning of netx cycle */
1267 clock1 = _x_get_monotonic_usec();
1269 bool connections_changed = false;
1270 bool ports_changed = false;
1271 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1272 if (_port_change_flag) {
1273 ports_changed = true;
1274 _port_change_flag = false;
1276 if (!_port_connection_queue.empty ()) {
1277 connections_changed = true;
1279 while (!_port_connection_queue.empty ()) {
1280 PortConnectData *c = _port_connection_queue.back ();
1281 manager.connect_callback (c->a, c->b, c->c);
1282 _port_connection_queue.pop_back ();
1285 pthread_mutex_unlock (&_port_callback_mutex);
1287 if (ports_changed) {
1288 manager.registration_callback();
1290 if (connections_changed) {
1291 manager.graph_order_callback();
1293 if (connections_changed || ports_changed) {
1294 engine.latency_callback(false);
1295 engine.latency_callback(true);
1304 /******************************************************************************/
1306 static boost::shared_ptr<DummyAudioBackend> _instance;
1308 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1309 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1310 static int deinstantiate ();
1311 static bool already_configured ();
1312 static bool available ();
1314 static ARDOUR::AudioBackendInfo _descriptor = {
1323 static boost::shared_ptr<AudioBackend>
1324 backend_factory (AudioEngine& e)
1327 _instance.reset (new DummyAudioBackend (e, _descriptor));
1333 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1335 s_instance_name = arg1;
1336 #ifdef PLATFORM_WINDOWS
1337 LARGE_INTEGER Frequency;
1338 if (!QueryPerformanceFrequency(&Frequency) || Frequency.QuadPart < 1) {
1341 _win_pc_rate = 1000000.0 / Frequency.QuadPart;
1355 already_configured ()
1358 return _instance->is_running();
1369 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1371 return &_descriptor;
1375 /******************************************************************************/
1376 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1377 : _dummy_backend (b)
1381 , _gen_cycle (false)
1383 _capture_latency_range.min = 0;
1384 _capture_latency_range.max = 0;
1385 _playback_latency_range.min = 0;
1386 _playback_latency_range.max = 0;
1387 _dummy_backend.port_connect_add_remove_callback();
1390 DummyPort::~DummyPort () {
1392 _dummy_backend.port_connect_add_remove_callback();
1396 int DummyPort::connect (DummyPort *port)
1399 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1403 if (type () != port->type ()) {
1404 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1408 if (is_output () && port->is_output ()) {
1409 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1413 if (is_input () && port->is_input ()) {
1414 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1419 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1423 if (is_connected (port)) {
1424 #if 0 // don't bother to warn about this for now. just ignore it
1425 PBD::error << _("DummyPort::connect (): ports are already connected:")
1426 << " (" << name () << ") -> (" << port->name () << ")"
1432 _connect (port, true);
1437 void DummyPort::_connect (DummyPort *port, bool callback)
1439 _connections.push_back (port);
1441 port->_connect (this, false);
1442 _dummy_backend.port_connect_callback (name(), port->name(), true);
1446 int DummyPort::disconnect (DummyPort *port)
1449 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1453 if (!is_connected (port)) {
1454 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1455 << " (" << name () << ") -> (" << port->name () << ")"
1459 _disconnect (port, true);
1463 void DummyPort::_disconnect (DummyPort *port, bool callback)
1465 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1467 assert (it != _connections.end ());
1469 _connections.erase (it);
1472 port->_disconnect (this, false);
1473 _dummy_backend.port_connect_callback (name(), port->name(), false);
1478 void DummyPort::disconnect_all ()
1480 while (!_connections.empty ()) {
1481 _connections.back ()->_disconnect (this, false);
1482 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1483 _connections.pop_back ();
1488 DummyPort::is_connected (const DummyPort *port) const
1490 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1493 bool DummyPort::is_physically_connected () const
1495 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1496 if ((*it)->is_physical ()) {
1503 void DummyPort::setup_random_number_generator ()
1505 #ifdef PLATFORM_WINDOWS
1506 LARGE_INTEGER Count;
1507 if (QueryPerformanceCounter (&Count)) {
1508 _rseed = Count.QuadPart % UINT_MAX;
1512 _rseed = g_get_monotonic_time() % UINT_MAX;
1514 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1520 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1521 // http://www.firstpr.com.au/dsp/rand31/
1523 lo = 16807 * (_rseed & 0xffff);
1524 hi = 16807 * (_rseed >> 16);
1526 lo += (hi & 0x7fff) << 16;
1529 lo = (lo & 0x7fffffff) + (lo >> 31);
1531 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1533 return (_rseed = lo);
1539 return (randi() / 1073741824.f) - 1.f;
1542 /******************************************************************************/
1544 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1545 : DummyPort (b, name, flags)
1546 , _gen_type (Silence)
1562 memset (_buffer, 0, sizeof (_buffer));
1565 DummyAudioPort::~DummyAudioPort () {
1570 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1572 DummyPort::setup_random_number_generator();
1575 switch (_gen_type) {
1578 case UniformWhiteNoise:
1579 case GaussianWhiteNoise:
1583 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1586 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1589 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1590 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1591 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1592 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1596 case SquareSweepSwell:
1598 case SineSweepSwell:
1600 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1602 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1603 const double f_min = 20.;
1604 const double f_max = samplerate * .5;
1605 const double g_p2 = _gen_period * .5;
1607 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1608 const double a = f_min / samplerate;
1610 const double b = log (f_max / f_min) / g_p2;
1611 const double a = f_min / (b * samplerate);
1613 const uint32_t g_p2i = rint(g_p2);
1614 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1615 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1617 const double phase = i * (a + b * i);
1619 const double phase = a * exp (b * i) - a;
1621 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1623 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1624 const uint32_t j = _gen_period - i;
1626 const double phase = j * (a + b * j);
1628 const double phase = a * exp (b * j) - a;
1630 _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
1632 if (_gen_type == SquareSweep) {
1633 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1634 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1637 else if (_gen_type == SquareSweepSwell) {
1638 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1639 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1645 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1650 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1652 memset(_wavetable, 0, n_samples * sizeof(float));
1653 /* generate an audio spike for every midi message
1654 * to verify layency-compensation alignment
1655 * (here: midi-out playback-latency + audio-in capture-latency)
1657 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1658 const pframes_t t = (*it)->timestamp();
1659 assert(t < n_samples);
1660 // somewhat arbitrary mapping for quick visual feedback
1662 if ((*it)->size() == 3) {
1663 const unsigned char *d = (*it)->const_data();
1664 if ((d[0] & 0xf0) == 0x90) { // note on
1665 v = .25f + d[2] / 512.f;
1667 else if ((d[0] & 0xf0) == 0x80) { // note off
1668 v = .3f - d[2] / 640.f;
1670 else if ((d[0] & 0xf0) == 0xb0) { // CC
1671 v = -.1f - d[2] / 256.f;
1678 float DummyAudioPort::grandf ()
1680 // Gaussian White Noise
1681 // http://www.musicdsp.org/archive.php?classid=0#109
1692 r = x1 * x1 + x2 * x2;
1693 } while ((r >= 1.0f) || (r < 1e-22f));
1695 r = sqrtf (-2.f * logf (r) / r);
1702 void DummyAudioPort::generate (const pframes_t n_samples)
1704 Glib::Threads::Mutex::Lock lm (generator_lock);
1709 switch (_gen_type) {
1711 memset (_buffer, 0, n_samples * sizeof (Sample));
1714 assert(_gen_period > 0);
1715 for (pframes_t i = 0 ; i < n_samples; ++i) {
1716 if (_gen_offset < _gen_period * .5f) {
1717 _buffer[i] = .40709f; // -6dBFS
1719 _buffer[i] = -.40709f;
1721 _gen_offset = (_gen_offset + 1) % _gen_period;
1725 assert(_gen_period > 0);
1726 memset (_buffer, 0, n_samples * sizeof (Sample));
1727 for (pframes_t i = 0; i < n_samples; ++i) {
1728 if (_gen_offset == 0) {
1731 _gen_offset = (_gen_offset + 1) % _gen_period;
1734 case SineSweepSwell:
1735 case SquareSweepSwell:
1736 assert(_wavetable && _gen_period > 0);
1738 const float vols = 2.f / (float)_gen_perio2;
1739 for (pframes_t i = 0; i < n_samples; ++i) {
1740 const float g = fabsf (_gen_count2 * vols - 1.0);
1741 _buffer[i] = g * _wavetable[_gen_offset];
1742 _gen_offset = (_gen_offset + 1) % _gen_period;
1743 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1748 _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
1752 assert(_wavetable && _gen_period > 0);
1754 pframes_t written = 0;
1755 while (written < n_samples) {
1756 const uint32_t remain = n_samples - written;
1757 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
1758 memcpy((void*)&_buffer[written],
1759 (void*)&_wavetable[_gen_offset],
1760 to_copy * sizeof(Sample));
1762 _gen_offset = (_gen_offset + to_copy) % _gen_period;
1766 case UniformWhiteNoise:
1767 for (pframes_t i = 0 ; i < n_samples; ++i) {
1768 _buffer[i] = .158489f * randf();
1771 case GaussianWhiteNoise:
1772 for (pframes_t i = 0 ; i < n_samples; ++i) {
1773 _buffer[i] = .089125f * grandf();
1777 for (pframes_t i = 0 ; i < n_samples; ++i) {
1778 // Paul Kellet's refined method
1779 // http://www.musicdsp.org/files/pink.txt
1780 // NB. If 'white' consists of uniform random numbers,
1781 // the pink noise will have an almost gaussian distribution.
1782 const float white = .0498f * randf ();
1783 _b0 = .99886f * _b0 + white * .0555179f;
1784 _b1 = .99332f * _b1 + white * .0750759f;
1785 _b2 = .96900f * _b2 + white * .1538520f;
1786 _b3 = .86650f * _b3 + white * .3104856f;
1787 _b4 = .55000f * _b4 + white * .5329522f;
1788 _b5 = -.7616f * _b5 - white * .0168980f;
1789 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
1790 _b6 = white * 0.115926f;
1794 for (pframes_t i = 0 ; i < n_samples; ++i) {
1795 const float white = 0.0498f * randf ();
1796 // Paul Kellet's economy method
1797 // http://www.musicdsp.org/files/pink.txt
1798 _b0 = 0.99765f * _b0 + white * 0.0990460f;
1799 _b1 = 0.96300f * _b1 + white * 0.2965164f;
1800 _b2 = 0.57000f * _b2 + white * 1.0526913f;
1801 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
1808 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1811 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1812 if (it == get_connections ().end ()) {
1813 memset (_buffer, 0, n_samples * sizeof (Sample));
1815 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1816 assert (source && source->is_output ());
1817 if (source->is_physical() && source->is_terminal()) {
1818 source->get_buffer(n_samples); // generate signal.
1820 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1821 while (++it != get_connections ().end ()) {
1822 source = static_cast<DummyAudioPort*>(*it);
1823 assert (source && source->is_output ());
1824 Sample* dst = buffer ();
1825 if (source->is_physical() && source->is_terminal()) {
1826 source->get_buffer(n_samples); // generate signal.
1828 const Sample* src = source->const_buffer ();
1829 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1834 } else if (is_output () && is_physical () && is_terminal()) {
1836 generate(n_samples);
1843 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1844 : DummyPort (b, name, flags)
1846 , _midi_seq_time (0)
1853 DummyMidiPort::~DummyMidiPort () {
1858 struct MidiEventSorter {
1859 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1864 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
1867 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1868 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1872 void DummyMidiPort::setup_generator (int seq_id, const float sr)
1874 DummyPort::setup_random_number_generator();
1875 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
1876 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
1881 void DummyMidiPort::midi_generate (const pframes_t n_samples)
1883 Glib::Threads::Mutex::Lock lm (generator_lock);
1891 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
1892 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
1893 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1899 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
1900 if (ev_beat_time < 0) {
1903 if ((pframes_t) ev_beat_time >= n_samples) {
1906 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
1908 _midi_seq_dat[_midi_seq_pos].event,
1909 _midi_seq_dat[_midi_seq_pos].size
1913 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
1914 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
1918 _midi_seq_time += n_samples;
1922 void* DummyMidiPort::get_buffer (pframes_t n_samples)
1926 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1927 i != get_connections ().end ();
1929 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
1930 if (source->is_physical() && source->is_terminal()) {
1931 source->get_buffer(n_samples); // generate signal.
1933 const DummyMidiBuffer *src = source->const_buffer ();
1934 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1935 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1938 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1939 } else if (is_output () && is_physical () && is_terminal()) {
1941 midi_generate(n_samples);
1947 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1949 , _timestamp (timestamp)
1953 _data = (uint8_t*) malloc (size);
1954 memcpy (_data, data, size);
1958 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
1959 : _size (other.size ())
1960 , _timestamp (other.timestamp ())
1963 if (other.size () && other.const_data ()) {
1964 _data = (uint8_t*) malloc (other.size ());
1965 memcpy (_data, other.const_data (), other.size ());
1969 DummyMidiEvent::~DummyMidiEvent () {