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 #include "dummy_audiobackend.h"
27 #include "dummy_midi_seq.h"
29 #include "pbd/error.h"
30 #include "ardour/port_manager.h"
33 using namespace ARDOUR;
35 static std::string s_instance_name;
36 size_t DummyAudioBackend::_max_buffer_size = 8192;
37 std::vector<std::string> DummyAudioBackend::_midi_options;
38 std::vector<AudioBackend::DeviceStatus> DummyAudioBackend::_device_status;
40 #ifdef PLATFORM_WINDOWS
41 static double _win_pc_rate = 0; // usec per tick
44 static int64_t _x_get_monotonic_usec() {
45 #ifdef PLATFORM_WINDOWS
46 if (_win_pc_rate > 0) {
48 // not very reliable, but the only realistic way for sub milli-seconds
49 if (QueryPerformanceCounter (&Count)) {
50 return (int64_t) (Count.QuadPart * _win_pc_rate);
55 return g_get_monotonic_time();
58 DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
59 : AudioBackend (e, info)
62 , _freewheeling (false)
65 , _samples_per_period (1024)
71 , _midi_mode (MidiNoEvents)
72 , _systemic_input_latency (0)
73 , _systemic_output_latency (0)
74 , _processed_samples (0)
75 , _port_change_flag (false)
77 _instance_name = s_instance_name;
78 _device = _("Silence");
79 pthread_mutex_init (&_port_callback_mutex, 0);
82 DummyAudioBackend::~DummyAudioBackend ()
84 pthread_mutex_destroy (&_port_callback_mutex);
87 /* AUDIOBACKEND API */
90 DummyAudioBackend::name () const
96 DummyAudioBackend::is_realtime () const
101 std::vector<AudioBackend::DeviceStatus>
102 DummyAudioBackend::enumerate_devices () const
104 if (_device_status.empty()) {
105 _device_status.push_back (DeviceStatus (_("Silence"), true));
106 _device_status.push_back (DeviceStatus (_("Sine Wave"), true));
107 _device_status.push_back (DeviceStatus (_("Square Wave"), true));
108 _device_status.push_back (DeviceStatus (_("Impulses"), true));
109 _device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
110 _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
111 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
112 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
113 _device_status.push_back (DeviceStatus (_("Sine Sweep"), true));
114 _device_status.push_back (DeviceStatus (_("Sine Sweep Swell"), true));
115 _device_status.push_back (DeviceStatus (_("Square Sweep"), true));
116 _device_status.push_back (DeviceStatus (_("Square Sweep Swell"), true));
117 _device_status.push_back (DeviceStatus (_("Loopback"), true));
119 return _device_status;
123 DummyAudioBackend::available_sample_rates (const std::string&) const
125 std::vector<float> sr;
126 sr.push_back (8000.0);
127 sr.push_back (22050.0);
128 sr.push_back (24000.0);
129 sr.push_back (44100.0);
130 sr.push_back (48000.0);
131 sr.push_back (88200.0);
132 sr.push_back (96000.0);
133 sr.push_back (176400.0);
134 sr.push_back (192000.0);
138 std::vector<uint32_t>
139 DummyAudioBackend::available_buffer_sizes (const std::string&) const
141 std::vector<uint32_t> bs;
158 DummyAudioBackend::available_input_channel_count (const std::string&) const
164 DummyAudioBackend::available_output_channel_count (const std::string&) const
170 DummyAudioBackend::can_change_sample_rate_when_running () const
176 DummyAudioBackend::can_change_buffer_size_when_running () const
182 DummyAudioBackend::set_device_name (const std::string& d)
189 DummyAudioBackend::set_sample_rate (float sr)
191 if (sr <= 0) { return -1; }
193 engine.sample_rate_change (sr);
198 DummyAudioBackend::set_buffer_size (uint32_t bs)
200 if (bs <= 0 || bs >= _max_buffer_size) {
203 _samples_per_period = bs;
205 /* update port latencies
206 * with 'Loopback' there is exactly once cycle latency,
207 * divide it between In + Out;
210 lr.min = lr.max = _systemic_input_latency;
211 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
212 set_latency_range (*it, false, lr);
214 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
215 set_latency_range (*it, false, lr);
218 lr.min = lr.max = _systemic_output_latency;
219 for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
220 set_latency_range (*it, true, lr);
222 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
223 set_latency_range (*it, true, lr);
226 engine.buffer_size_change (bs);
231 DummyAudioBackend::set_interleaved (bool yn)
233 if (!yn) { return 0; }
238 DummyAudioBackend::set_input_channels (uint32_t cc)
245 DummyAudioBackend::set_output_channels (uint32_t cc)
252 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
254 _systemic_input_latency = sl;
259 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
261 _systemic_output_latency = sl;
265 /* Retrieving parameters */
267 DummyAudioBackend::device_name () const
273 DummyAudioBackend::sample_rate () const
279 DummyAudioBackend::buffer_size () const
281 return _samples_per_period;
285 DummyAudioBackend::interleaved () const
291 DummyAudioBackend::input_channels () const
297 DummyAudioBackend::output_channels () const
303 DummyAudioBackend::systemic_input_latency () const
305 return _systemic_input_latency;
309 DummyAudioBackend::systemic_output_latency () const
311 return _systemic_output_latency;
316 std::vector<std::string>
317 DummyAudioBackend::enumerate_midi_options () const
319 if (_midi_options.empty()) {
320 _midi_options.push_back (_("1 in, 1 out, Silence"));
321 _midi_options.push_back (_("2 in, 2 out, Silence"));
322 _midi_options.push_back (_("8 in, 8 out, Silence"));
323 _midi_options.push_back (_("Midi Event Generators"));
324 _midi_options.push_back (_("8 in, 8 out, Loopback"));
325 _midi_options.push_back (_("MIDI to Audio, Loopback"));
326 _midi_options.push_back (_("No MIDI I/O"));
328 return _midi_options;
332 DummyAudioBackend::set_midi_option (const std::string& opt)
334 _midi_mode = MidiNoEvents;
335 if (opt == _("1 in, 1 out, Silence")) {
336 _n_midi_inputs = _n_midi_outputs = 1;
338 else if (opt == _("2 in, 2 out, Silence")) {
339 _n_midi_inputs = _n_midi_outputs = 2;
341 else if (opt == _("8 in, 8 out, Silence")) {
342 _n_midi_inputs = _n_midi_outputs = 8;
344 else if (opt == _("Midi Event Generators")) {
345 _n_midi_inputs = _n_midi_outputs = NUM_MIDI_EVENT_GENERATORS;
346 _midi_mode = MidiGenerator;
348 else if (opt == _("8 in, 8 out, Loopback")) {
349 _n_midi_inputs = _n_midi_outputs = 8;
350 _midi_mode = MidiLoopback;
352 else if (opt == _("MIDI to Audio, Loopback")) {
353 _n_midi_inputs = _n_midi_outputs = UINT32_MAX;
354 _midi_mode = MidiToAudio;
357 _n_midi_inputs = _n_midi_outputs = 0;
363 DummyAudioBackend::midi_option () const
370 static void * pthread_process (void *arg)
372 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
373 d->main_process_thread ();
379 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
382 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
387 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
388 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
389 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
391 _system_inputs.clear();
392 _system_outputs.clear();
393 _system_midi_in.clear();
394 _system_midi_out.clear();
398 if (register_system_ports()) {
399 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
403 engine.sample_rate_change (_samplerate);
404 engine.buffer_size_change (_samples_per_period);
406 if (engine.reestablish_ports ()) {
407 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
412 engine.reconnect_ports ();
413 _port_change_flag = false;
415 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
416 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
420 while (!_running && --timeout > 0) { Glib::usleep (1000); }
422 if (timeout == 0 || !_running) {
423 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
431 DummyAudioBackend::stop ()
439 if (pthread_join (_main_thread, &status)) {
440 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
448 DummyAudioBackend::freewheel (bool onoff)
450 _freewheeling = onoff;
455 DummyAudioBackend::dsp_load () const
457 return 100.f * _dsp_load;
461 DummyAudioBackend::raw_buffer_size (DataType t)
464 case DataType::AUDIO:
465 return _samples_per_period * sizeof(Sample);
467 return _max_buffer_size; // XXX not really limited
474 DummyAudioBackend::sample_time ()
476 return _processed_samples;
480 DummyAudioBackend::sample_time_at_cycle_start ()
482 return _processed_samples;
486 DummyAudioBackend::samples_since_cycle_start ()
493 DummyAudioBackend::dummy_process_thread (void *arg)
495 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
496 boost::function<void ()> f = td->f;
503 DummyAudioBackend::create_process_thread (boost::function<void()> func)
507 size_t stacksize = 100000;
509 pthread_attr_init (&attr);
510 pthread_attr_setstacksize (&attr, stacksize);
511 ThreadData* td = new ThreadData (this, func, stacksize);
513 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
514 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
515 pthread_attr_destroy (&attr);
518 pthread_attr_destroy (&attr);
520 _threads.push_back (thread_id);
525 DummyAudioBackend::join_process_threads ()
529 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
532 if (pthread_join (*i, &status)) {
533 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
542 DummyAudioBackend::in_process_thread ()
544 if (pthread_equal (_main_thread, pthread_self()) != 0) {
548 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
550 if (pthread_equal (*i, pthread_self ()) != 0) {
558 DummyAudioBackend::process_thread_count ()
560 return _threads.size ();
564 DummyAudioBackend::update_latencies ()
566 // trigger latency callback in RT thread (locked graph)
567 port_connect_add_remove_callback();
573 DummyAudioBackend::private_handle () const
579 DummyAudioBackend::my_name () const
581 return _instance_name;
585 DummyAudioBackend::available () const
591 DummyAudioBackend::port_name_size () const
597 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
599 if (!valid_port (port)) {
600 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
603 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
607 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
609 if (!valid_port (port)) {
610 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
611 return std::string ();
613 return static_cast<DummyPort*>(port)->name ();
616 PortEngine::PortHandle
617 DummyAudioBackend::get_port_by_name (const std::string& name) const
619 PortHandle port = (PortHandle) find_port (name);
624 DummyAudioBackend::get_ports (
625 const std::string& port_name_pattern,
626 DataType type, PortFlags flags,
627 std::vector<std::string>& port_names) const
631 bool use_regexp = false;
632 if (port_name_pattern.size () > 0) {
633 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
637 for (size_t i = 0; i < _ports.size (); ++i) {
638 DummyPort* port = _ports[i];
639 if ((port->type () == type) && (port->flags () & flags)) {
640 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
641 port_names.push_back (port->name ());
647 regfree (&port_regex);
653 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
655 if (!valid_port (port)) {
656 return DataType::NIL;
658 return static_cast<DummyPort*>(port)->type ();
661 PortEngine::PortHandle
662 DummyAudioBackend::register_port (
663 const std::string& name,
664 ARDOUR::DataType type,
665 ARDOUR::PortFlags flags)
667 if (name.size () == 0) { return 0; }
668 if (flags & IsPhysical) { return 0; }
670 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
672 return add_port (_instance_name + ":" + name, type, flags);
675 PortEngine::PortHandle
676 DummyAudioBackend::add_port (
677 const std::string& name,
678 ARDOUR::DataType type,
679 ARDOUR::PortFlags flags)
681 assert(name.size ());
682 if (find_port (name)) {
683 PBD::error << _("DummyBackend::register_port: Port already exists:")
684 << " (" << name << ")" << endmsg;
687 DummyPort* port = NULL;
689 case DataType::AUDIO:
690 port = new DummyAudioPort (*this, name, flags);
693 port = new DummyMidiPort (*this, name, flags);
696 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
700 _ports.push_back (port);
706 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
709 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
710 assert (!valid_port (port_handle));
713 DummyPort* port = static_cast<DummyPort*>(port_handle);
714 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
715 if (i == _ports.end ()) {
716 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
719 disconnect_all(port_handle);
725 DummyAudioBackend::register_system_ports()
728 enum DummyAudioPort::GeneratorType gt;
729 if (_device == _("Uniform White Noise")) {
730 gt = DummyAudioPort::UniformWhiteNoise;
731 } else if (_device == _("Gaussian White Noise")) {
732 gt = DummyAudioPort::GaussianWhiteNoise;
733 } else if (_device == _("Pink Noise")) {
734 gt = DummyAudioPort::PinkNoise;
735 } else if (_device == _("Pink Noise (low CPU)")) {
736 gt = DummyAudioPort::PonyNoise;
737 } else if (_device == _("Sine Wave")) {
738 gt = DummyAudioPort::SineWave;
739 } else if (_device == _("Square Wave")) {
740 gt = DummyAudioPort::SquareWave;
741 } else if (_device == _("Impulses")) {
742 gt = DummyAudioPort::KronekerDelta;
743 } else if (_device == _("Sine Sweep")) {
744 gt = DummyAudioPort::SineSweep;
745 } else if (_device == _("Sine Sweep Swell")) {
746 gt = DummyAudioPort::SineSweepSwell;
747 } else if (_device == _("Square Sweep")) {
748 gt = DummyAudioPort::SquareSweep;
749 } else if (_device == _("Square Sweep Swell")) {
750 gt = DummyAudioPort::SquareSweepSwell;
751 } else if (_device == _("Loopback")) {
752 gt = DummyAudioPort::Loopback;
754 gt = DummyAudioPort::Silence;
757 if (_midi_mode == MidiToAudio) {
758 gt = DummyAudioPort::Loopback;
761 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
762 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
763 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
764 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
768 lr.min = lr.max = _systemic_input_latency;
769 for (int i = 1; i <= a_ins; ++i) {
771 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
772 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
774 set_latency_range (p, false, lr);
775 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
776 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
779 lr.min = lr.max = _systemic_output_latency;
780 for (int i = 1; i <= a_out; ++i) {
782 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
783 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
785 set_latency_range (p, true, lr);
786 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
790 lr.min = lr.max = _systemic_input_latency;
791 for (int i = 0; i < m_ins; ++i) {
793 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
794 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
796 set_latency_range (p, false, lr);
797 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
798 if (_midi_mode == MidiGenerator) {
799 static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
803 lr.min = lr.max = _systemic_output_latency;
804 for (int i = 1; i <= m_out; ++i) {
806 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
807 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
809 set_latency_range (p, true, lr);
810 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
816 DummyAudioBackend::unregister_ports (bool system_only)
819 _system_inputs.clear();
820 _system_outputs.clear();
821 _system_midi_in.clear();
822 _system_midi_out.clear();
823 while (i < _ports.size ()) {
824 DummyPort* port = _ports[i];
825 if (! system_only || (port->is_physical () && port->is_terminal ())) {
826 port->disconnect_all ();
828 _ports.erase (_ports.begin() + i);
836 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
838 DummyPort* src_port = find_port (src);
839 DummyPort* dst_port = find_port (dst);
842 PBD::error << _("DummyBackend::connect: Invalid Source port:")
843 << " (" << src <<")" << endmsg;
847 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
848 << " (" << dst <<")" << endmsg;
851 return src_port->connect (dst_port);
855 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
857 DummyPort* src_port = find_port (src);
858 DummyPort* dst_port = find_port (dst);
860 if (!src_port || !dst_port) {
861 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
864 return src_port->disconnect (dst_port);
868 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
870 DummyPort* dst_port = find_port (dst);
871 if (!valid_port (src)) {
872 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
876 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
877 << " (" << dst << ")" << endmsg;
880 return static_cast<DummyPort*>(src)->connect (dst_port);
884 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
886 DummyPort* dst_port = find_port (dst);
887 if (!valid_port (src) || !dst_port) {
888 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
891 return static_cast<DummyPort*>(src)->disconnect (dst_port);
895 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
897 if (!valid_port (port)) {
898 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
901 static_cast<DummyPort*>(port)->disconnect_all ();
906 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
908 if (!valid_port (port)) {
909 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
912 return static_cast<DummyPort*>(port)->is_connected ();
916 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
918 DummyPort* dst_port = find_port (dst);
919 if (!valid_port (src) || !dst_port) {
920 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
923 return static_cast<DummyPort*>(src)->is_connected (dst_port);
927 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
929 if (!valid_port (port)) {
930 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
933 return static_cast<DummyPort*>(port)->is_physically_connected ();
937 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
939 if (!valid_port (port)) {
940 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
944 assert (0 == names.size ());
946 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
948 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
949 names.push_back ((*i)->name ());
952 return (int)names.size ();
957 DummyAudioBackend::midi_event_get (
958 pframes_t& timestamp,
959 size_t& size, uint8_t** buf, void* port_buffer,
960 uint32_t event_index)
962 assert (buf && port_buffer);
963 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
964 if (event_index >= source.size ()) {
967 DummyMidiEvent * const event = source[event_index].get ();
969 timestamp = event->timestamp ();
970 size = event->size ();
971 *buf = event->data ();
976 DummyAudioBackend::midi_event_put (
979 const uint8_t* buffer, size_t size)
981 assert (buffer && port_buffer);
982 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
983 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
984 // nevermind, ::get_buffer() sorts events, but always print warning
985 fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
987 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
992 DummyAudioBackend::get_midi_event_count (void* port_buffer)
994 assert (port_buffer);
995 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
999 DummyAudioBackend::midi_clear (void* port_buffer)
1001 assert (port_buffer);
1002 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1010 DummyAudioBackend::can_monitor_input () const
1016 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1022 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1028 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1033 /* Latency management */
1036 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1038 if (!valid_port (port)) {
1039 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1041 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1045 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1048 if (!valid_port (port)) {
1049 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1054 DummyPort *p = static_cast<DummyPort*>(port);
1057 r = p->latency_range (for_playback);
1058 if (p->is_physical() && p->is_terminal()) {
1059 if (p->is_input() && for_playback) {
1060 const size_t l_in = _samples_per_period * .25;
1064 if (p->is_output() && !for_playback) {
1065 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1066 const size_t l_in = _samples_per_period * .25;
1067 const size_t l_out = _samples_per_period - l_in;
1075 /* Discovering physical ports */
1078 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1080 if (!valid_port (port)) {
1081 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1084 return static_cast<DummyPort*>(port)->is_physical ();
1088 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1090 for (size_t i = 0; i < _ports.size (); ++i) {
1091 DummyPort* port = _ports[i];
1092 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1093 port_names.push_back (port->name ());
1099 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1101 for (size_t i = 0; i < _ports.size (); ++i) {
1102 DummyPort* port = _ports[i];
1103 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1104 port_names.push_back (port->name ());
1110 DummyAudioBackend::n_physical_outputs () const
1114 for (size_t i = 0; i < _ports.size (); ++i) {
1115 DummyPort* port = _ports[i];
1116 if (port->is_output () && port->is_physical ()) {
1117 switch (port->type ()) {
1118 case DataType::AUDIO: ++n_audio; break;
1119 case DataType::MIDI: ++n_midi; break;
1125 cc.set (DataType::AUDIO, n_audio);
1126 cc.set (DataType::MIDI, n_midi);
1131 DummyAudioBackend::n_physical_inputs () const
1135 for (size_t i = 0; i < _ports.size (); ++i) {
1136 DummyPort* port = _ports[i];
1137 if (port->is_input () && port->is_physical ()) {
1138 switch (port->type ()) {
1139 case DataType::AUDIO: ++n_audio; break;
1140 case DataType::MIDI: ++n_midi; break;
1146 cc.set (DataType::AUDIO, n_audio);
1147 cc.set (DataType::MIDI, n_midi);
1151 /* Getting access to the data buffer for a port */
1154 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1157 assert (valid_port (port));
1158 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1161 /* Engine Process */
1163 DummyAudioBackend::main_process_thread ()
1165 AudioEngine::thread_init_callback (this);
1167 _processed_samples = 0;
1169 manager.registration_callback();
1170 manager.graph_order_callback();
1172 int64_t clock1, clock2;
1173 clock1 = _x_get_monotonic_usec();
1176 if (_freewheeling != _freewheel) {
1177 _freewheel = _freewheeling;
1178 engine.freewheel_callback (_freewheel);
1181 // re-set input buffers, generate on demand.
1182 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1183 (*it)->next_period();
1185 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1186 (*it)->next_period();
1189 if (engine.process_callback (_samples_per_period)) {
1192 _processed_samples += _samples_per_period;
1194 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1196 int opc = _system_outputs.size();
1197 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1198 DummyAudioPort* op = _system_outputs[(opn % opc)];
1199 (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
1203 if (_midi_mode == MidiLoopback) {
1205 int opc = _system_midi_out.size();
1206 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1207 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1208 op->get_buffer(0); // mix-down
1209 (*it)->set_loopback (op->const_buffer());
1212 else if (_midi_mode == MidiToAudio) {
1214 int opc = _system_midi_out.size();
1215 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1216 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1217 op->get_buffer(0); // mix-down
1218 (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
1223 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1224 clock2 = _x_get_monotonic_usec();
1225 #ifdef PLATFORM_WINDOWS
1226 bool win_timers_ok = true;
1227 /* querying the performance counter can fail occasionally (-1).
1228 * Also on some multi-core systems, timers are CPU specific and not
1229 * synchronized. We assume they differ more than a few milliseconds
1230 * (4 * nominal cycle time) and simply ignore cases where the
1231 * execution switches cores.
1233 if (clock1 < 0 || clock2 < 0 || (clock1 > clock2) || (clock2 - clock1) > 4 * nomial_time) {
1234 clock2 = clock1 = 0;
1235 win_timers_ok = false;
1238 const int64_t elapsed_time = clock2 - clock1;
1239 #ifdef PLATFORM_WINDOWS
1242 { // low pass filter
1243 _dsp_load = _dsp_load + .05 * ((elapsed_time / (float) nomial_time) - _dsp_load) + 1e-12;
1246 if (elapsed_time < nomial_time) {
1247 Glib::usleep (nomial_time - elapsed_time);
1249 Glib::usleep (100); // don't hog cpu
1253 Glib::usleep (100); // don't hog cpu
1256 /* beginning of netx cycle */
1257 clock1 = _x_get_monotonic_usec();
1259 bool connections_changed = false;
1260 bool ports_changed = false;
1261 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1262 if (_port_change_flag) {
1263 ports_changed = true;
1264 _port_change_flag = false;
1266 if (!_port_connection_queue.empty ()) {
1267 connections_changed = true;
1269 while (!_port_connection_queue.empty ()) {
1270 PortConnectData *c = _port_connection_queue.back ();
1271 manager.connect_callback (c->a, c->b, c->c);
1272 _port_connection_queue.pop_back ();
1275 pthread_mutex_unlock (&_port_callback_mutex);
1277 if (ports_changed) {
1278 manager.registration_callback();
1280 if (connections_changed) {
1281 manager.graph_order_callback();
1283 if (connections_changed || ports_changed) {
1284 engine.latency_callback(false);
1285 engine.latency_callback(true);
1294 /******************************************************************************/
1296 static boost::shared_ptr<DummyAudioBackend> _instance;
1298 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1299 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1300 static int deinstantiate ();
1301 static bool already_configured ();
1302 static bool available ();
1304 static ARDOUR::AudioBackendInfo _descriptor = {
1313 static boost::shared_ptr<AudioBackend>
1314 backend_factory (AudioEngine& e)
1317 _instance.reset (new DummyAudioBackend (e, _descriptor));
1323 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1325 s_instance_name = arg1;
1326 #ifdef PLATFORM_WINDOWS
1327 LARGE_INTEGER Frequency;
1328 if (!QueryPerformanceFrequency(&Frequency) || Frequency.QuadPart < 1) {
1331 _win_pc_rate = 1000000.0 / Frequency.QuadPart;
1345 already_configured ()
1348 return _instance->is_running();
1359 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1361 return &_descriptor;
1365 /******************************************************************************/
1366 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1367 : _dummy_backend (b)
1371 , _gen_cycle (false)
1373 _capture_latency_range.min = 0;
1374 _capture_latency_range.max = 0;
1375 _playback_latency_range.min = 0;
1376 _playback_latency_range.max = 0;
1377 _dummy_backend.port_connect_add_remove_callback();
1380 DummyPort::~DummyPort () {
1382 _dummy_backend.port_connect_add_remove_callback();
1386 int DummyPort::connect (DummyPort *port)
1389 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1393 if (type () != port->type ()) {
1394 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1398 if (is_output () && port->is_output ()) {
1399 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1403 if (is_input () && port->is_input ()) {
1404 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1409 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1413 if (is_connected (port)) {
1414 #if 0 // don't bother to warn about this for now. just ignore it
1415 PBD::error << _("DummyPort::connect (): ports are already connected:")
1416 << " (" << name () << ") -> (" << port->name () << ")"
1422 _connect (port, true);
1427 void DummyPort::_connect (DummyPort *port, bool callback)
1429 _connections.push_back (port);
1431 port->_connect (this, false);
1432 _dummy_backend.port_connect_callback (name(), port->name(), true);
1436 int DummyPort::disconnect (DummyPort *port)
1439 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1443 if (!is_connected (port)) {
1444 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1445 << " (" << name () << ") -> (" << port->name () << ")"
1449 _disconnect (port, true);
1453 void DummyPort::_disconnect (DummyPort *port, bool callback)
1455 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1457 assert (it != _connections.end ());
1459 _connections.erase (it);
1462 port->_disconnect (this, false);
1463 _dummy_backend.port_connect_callback (name(), port->name(), false);
1468 void DummyPort::disconnect_all ()
1470 while (!_connections.empty ()) {
1471 _connections.back ()->_disconnect (this, false);
1472 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1473 _connections.pop_back ();
1478 DummyPort::is_connected (const DummyPort *port) const
1480 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1483 bool DummyPort::is_physically_connected () const
1485 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1486 if ((*it)->is_physical ()) {
1493 void DummyPort::setup_random_number_generator ()
1495 #ifdef PLATFORM_WINDOWS
1496 LARGE_INTEGER Count;
1497 if (QueryPerformanceCounter (&Count)) {
1498 _rseed = Count.QuadPart % UINT_MAX;
1502 _rseed = g_get_monotonic_time() % UINT_MAX;
1504 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1510 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1511 // http://www.firstpr.com.au/dsp/rand31/
1513 lo = 16807 * (_rseed & 0xffff);
1514 hi = 16807 * (_rseed >> 16);
1516 lo += (hi & 0x7fff) << 16;
1519 lo = (lo & 0x7fffffff) + (lo >> 31);
1521 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1523 return (_rseed = lo);
1529 return (randi() / 1073741824.f) - 1.f;
1532 /******************************************************************************/
1534 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1535 : DummyPort (b, name, flags)
1536 , _gen_type (Silence)
1552 memset (_buffer, 0, sizeof (_buffer));
1555 DummyAudioPort::~DummyAudioPort () {
1560 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1562 DummyPort::setup_random_number_generator();
1565 switch (_gen_type) {
1568 case UniformWhiteNoise:
1569 case GaussianWhiteNoise:
1573 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1576 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1579 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1580 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1581 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1582 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1586 case SquareSweepSwell:
1588 case SineSweepSwell:
1590 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1592 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1593 const double f_min = 20.;
1594 const double f_max = samplerate * .5;
1595 const double g_p2 = _gen_period * .5;
1597 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1598 const double a = f_min / samplerate;
1600 const double b = log (f_max / f_min) / g_p2;
1601 const double a = f_min / (b * samplerate);
1603 const uint32_t g_p2i = rint(g_p2);
1604 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1605 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1607 const double phase = i * (a + b * i);
1609 const double phase = a * exp (b * i) - a;
1611 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1613 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1614 const uint32_t j = _gen_period - i;
1616 const double phase = j * (a + b * j);
1618 const double phase = a * exp (b * j) - a;
1620 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1622 if (_gen_type == SquareSweep) {
1623 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1624 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1627 else if (_gen_type == SquareSweepSwell) {
1628 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1629 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1635 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1640 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1642 memset(_wavetable, 0, n_samples * sizeof(float));
1643 /* generate an audio spike for every midi message
1644 * to verify layency-compensation alignment
1645 * (here: midi-out playback-latency + audio-in capture-latency)
1647 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1648 const pframes_t t = (*it)->timestamp();
1649 assert(t < n_samples);
1650 // somewhat arbitrary mapping for quick visual feedback
1652 if ((*it)->size() == 3) {
1653 const unsigned char *d = (*it)->const_data();
1654 if ((d[0] & 0xf0) == 0x90) { // note on
1655 v = .25f + d[2] / 512.f;
1657 else if ((d[0] & 0xf0) == 0x80) { // note off
1658 v = .3f - d[2] / 640.f;
1660 else if ((d[0] & 0xf0) == 0xb0) { // CC
1661 v = -.1f - d[2] / 256.f;
1668 float DummyAudioPort::grandf ()
1670 // Gaussian White Noise
1671 // http://www.musicdsp.org/archive.php?classid=0#109
1682 r = x1 * x1 + x2 * x2;
1683 } while ((r >= 1.0f) || (r < 1e-22f));
1685 r = sqrtf (-2.f * logf (r) / r);
1692 void DummyAudioPort::generate (const pframes_t n_samples)
1694 Glib::Threads::Mutex::Lock lm (generator_lock);
1699 switch (_gen_type) {
1701 memset (_buffer, 0, n_samples * sizeof (Sample));
1704 assert(_gen_period > 0);
1705 for (pframes_t i = 0 ; i < n_samples; ++i) {
1706 if (_gen_offset < _gen_period * .5f) {
1707 _buffer[i] = .40709f; // -6dBFS
1709 _buffer[i] = -.40709f;
1711 _gen_offset = (_gen_offset + 1) % _gen_period;
1715 assert(_gen_period > 0);
1716 memset (_buffer, 0, n_samples * sizeof (Sample));
1717 for (pframes_t i = 0; i < n_samples; ++i) {
1718 if (_gen_offset == 0) {
1721 _gen_offset = (_gen_offset + 1) % _gen_period;
1724 case SineSweepSwell:
1725 case SquareSweepSwell:
1726 assert(_wavetable && _gen_period > 0);
1728 const float vols = 2.f / (float)_gen_perio2;
1729 for (pframes_t i = 0; i < n_samples; ++i) {
1730 const float g = fabsf (_gen_count2 * vols - 1.0);
1731 _buffer[i] = g * _wavetable[_gen_offset];
1732 _gen_offset = (_gen_offset + 1) % _gen_period;
1733 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1738 _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
1742 assert(_wavetable && _gen_period > 0);
1744 pframes_t written = 0;
1745 while (written < n_samples) {
1746 const uint32_t remain = n_samples - written;
1747 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
1748 memcpy((void*)&_buffer[written],
1749 (void*)&_wavetable[_gen_offset],
1750 to_copy * sizeof(Sample));
1752 _gen_offset = (_gen_offset + to_copy) % _gen_period;
1756 case UniformWhiteNoise:
1757 for (pframes_t i = 0 ; i < n_samples; ++i) {
1758 _buffer[i] = .158489f * randf();
1761 case GaussianWhiteNoise:
1762 for (pframes_t i = 0 ; i < n_samples; ++i) {
1763 _buffer[i] = .089125f * grandf();
1767 for (pframes_t i = 0 ; i < n_samples; ++i) {
1768 // Paul Kellet's refined method
1769 // http://www.musicdsp.org/files/pink.txt
1770 // NB. If 'white' consists of uniform random numbers,
1771 // the pink noise will have an almost gaussian distribution.
1772 const float white = .0498f * randf ();
1773 _b0 = .99886f * _b0 + white * .0555179f;
1774 _b1 = .99332f * _b1 + white * .0750759f;
1775 _b2 = .96900f * _b2 + white * .1538520f;
1776 _b3 = .86650f * _b3 + white * .3104856f;
1777 _b4 = .55000f * _b4 + white * .5329522f;
1778 _b5 = -.7616f * _b5 - white * .0168980f;
1779 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
1780 _b6 = white * 0.115926f;
1784 for (pframes_t i = 0 ; i < n_samples; ++i) {
1785 const float white = 0.0498f * randf ();
1786 // Paul Kellet's economy method
1787 // http://www.musicdsp.org/files/pink.txt
1788 _b0 = 0.99765f * _b0 + white * 0.0990460f;
1789 _b1 = 0.96300f * _b1 + white * 0.2965164f;
1790 _b2 = 0.57000f * _b2 + white * 1.0526913f;
1791 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
1798 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1801 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1802 if (it == get_connections ().end ()) {
1803 memset (_buffer, 0, n_samples * sizeof (Sample));
1805 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1806 assert (source && source->is_output ());
1807 if (source->is_physical() && source->is_terminal()) {
1808 source->get_buffer(n_samples); // generate signal.
1810 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1811 while (++it != get_connections ().end ()) {
1812 source = static_cast<DummyAudioPort*>(*it);
1813 assert (source && source->is_output ());
1814 Sample* dst = buffer ();
1815 if (source->is_physical() && source->is_terminal()) {
1816 source->get_buffer(n_samples); // generate signal.
1818 const Sample* src = source->const_buffer ();
1819 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1824 } else if (is_output () && is_physical () && is_terminal()) {
1826 generate(n_samples);
1833 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1834 : DummyPort (b, name, flags)
1836 , _midi_seq_time (0)
1843 DummyMidiPort::~DummyMidiPort () {
1848 struct MidiEventSorter {
1849 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1854 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
1857 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1858 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1862 void DummyMidiPort::setup_generator (int seq_id, const float sr)
1864 DummyPort::setup_random_number_generator();
1865 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
1866 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
1871 void DummyMidiPort::midi_generate (const pframes_t n_samples)
1873 Glib::Threads::Mutex::Lock lm (generator_lock);
1881 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
1882 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
1883 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1889 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
1890 if (ev_beat_time < 0) {
1893 if ((pframes_t) ev_beat_time >= n_samples) {
1896 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
1898 _midi_seq_dat[_midi_seq_pos].event,
1899 _midi_seq_dat[_midi_seq_pos].size
1903 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
1904 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
1908 _midi_seq_time += n_samples;
1912 void* DummyMidiPort::get_buffer (pframes_t n_samples)
1916 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1917 i != get_connections ().end ();
1919 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
1920 if (source->is_physical() && source->is_terminal()) {
1921 source->get_buffer(n_samples); // generate signal.
1923 const DummyMidiBuffer *src = source->const_buffer ();
1924 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1925 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1928 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1929 } else if (is_output () && is_physical () && is_terminal()) {
1931 midi_generate(n_samples);
1937 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1939 , _timestamp (timestamp)
1943 _data = (uint8_t*) malloc (size);
1944 memcpy (_data, data, size);
1948 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
1949 : _size (other.size ())
1950 , _timestamp (other.timestamp ())
1953 if (other.size () && other.const_data ()) {
1954 _data = (uint8_t*) malloc (other.size ());
1955 memcpy (_data, other.const_data (), other.size ());
1959 DummyMidiEvent::~DummyMidiEvent () {