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;
209 const size_t l_in = _samples_per_period * .25;
210 const size_t l_out = _samples_per_period - l_in;
212 lr.min = lr.max = l_in + _systemic_input_latency;
213 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
214 set_latency_range (*it, false, lr);
216 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
217 set_latency_range (*it, false, lr);
220 lr.min = lr.max = l_out + _systemic_output_latency;
221 for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
222 set_latency_range (*it, true, lr);
224 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
225 set_latency_range (*it, true, lr);
228 engine.buffer_size_change (bs);
233 DummyAudioBackend::set_interleaved (bool yn)
235 if (!yn) { return 0; }
240 DummyAudioBackend::set_input_channels (uint32_t cc)
247 DummyAudioBackend::set_output_channels (uint32_t cc)
254 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
256 _systemic_input_latency = sl;
261 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
263 _systemic_output_latency = sl;
267 /* Retrieving parameters */
269 DummyAudioBackend::device_name () const
275 DummyAudioBackend::sample_rate () const
281 DummyAudioBackend::buffer_size () const
283 return _samples_per_period;
287 DummyAudioBackend::interleaved () const
293 DummyAudioBackend::input_channels () const
299 DummyAudioBackend::output_channels () const
305 DummyAudioBackend::systemic_input_latency () const
307 return _systemic_input_latency;
311 DummyAudioBackend::systemic_output_latency () const
313 return _systemic_output_latency;
318 std::vector<std::string>
319 DummyAudioBackend::enumerate_midi_options () const
321 if (_midi_options.empty()) {
322 _midi_options.push_back (_("No MIDI I/O"));
323 _midi_options.push_back (_("1 in, 1 out, Silence"));
324 _midi_options.push_back (_("2 in, 2 out, Silence"));
325 _midi_options.push_back (_("8 in, 8 out, Silence"));
326 _midi_options.push_back (_("Midi Event Generators"));
327 _midi_options.push_back (_("8 in, 8 out, Loopback"));
328 _midi_options.push_back (_("MIDI to Audio, Loopback"));
330 return _midi_options;
334 DummyAudioBackend::set_midi_option (const std::string& opt)
336 _midi_mode = MidiNoEvents;
337 if (opt == _("1 in, 1 out, Silence")) {
338 _n_midi_inputs = _n_midi_outputs = 1;
340 else if (opt == _("2 in, 2 out, Silence")) {
341 _n_midi_inputs = _n_midi_outputs = 2;
343 else if (opt == _("8 in, 8 out, Silence")) {
344 _n_midi_inputs = _n_midi_outputs = 8;
346 else if (opt == _("Midi Event Generators")) {
347 _n_midi_inputs = _n_midi_outputs = NUM_MIDI_EVENT_GENERATORS;
348 _midi_mode = MidiGenerator;
350 else if (opt == _("8 in, 8 out, Loopback")) {
351 _n_midi_inputs = _n_midi_outputs = 8;
352 _midi_mode = MidiLoopback;
354 else if (opt == _("MIDI to Audio, Loopback")) {
355 _n_midi_inputs = _n_midi_outputs = UINT32_MAX;
356 _midi_mode = MidiToAudio;
359 _n_midi_inputs = _n_midi_outputs = 0;
365 DummyAudioBackend::midi_option () const
372 static void * pthread_process (void *arg)
374 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
375 d->main_process_thread ();
381 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
384 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
389 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
390 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
391 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
393 _system_inputs.clear();
394 _system_outputs.clear();
395 _system_midi_in.clear();
396 _system_midi_out.clear();
400 if (register_system_ports()) {
401 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
405 engine.sample_rate_change (_samplerate);
406 engine.buffer_size_change (_samples_per_period);
408 if (engine.reestablish_ports ()) {
409 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
414 engine.reconnect_ports ();
415 _port_change_flag = false;
417 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
418 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
422 while (!_running && --timeout > 0) { Glib::usleep (1000); }
424 if (timeout == 0 || !_running) {
425 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
433 DummyAudioBackend::stop ()
441 if (pthread_join (_main_thread, &status)) {
442 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
450 DummyAudioBackend::freewheel (bool onoff)
452 _freewheeling = onoff;
457 DummyAudioBackend::dsp_load () const
459 return 100.f * _dsp_load;
463 DummyAudioBackend::raw_buffer_size (DataType t)
466 case DataType::AUDIO:
467 return _samples_per_period * sizeof(Sample);
469 return _max_buffer_size; // XXX not really limited
476 DummyAudioBackend::sample_time ()
478 return _processed_samples;
482 DummyAudioBackend::sample_time_at_cycle_start ()
484 return _processed_samples;
488 DummyAudioBackend::samples_since_cycle_start ()
495 DummyAudioBackend::dummy_process_thread (void *arg)
497 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
498 boost::function<void ()> f = td->f;
505 DummyAudioBackend::create_process_thread (boost::function<void()> func)
509 size_t stacksize = 100000;
511 pthread_attr_init (&attr);
512 pthread_attr_setstacksize (&attr, stacksize);
513 ThreadData* td = new ThreadData (this, func, stacksize);
515 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
516 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
517 pthread_attr_destroy (&attr);
520 pthread_attr_destroy (&attr);
522 _threads.push_back (thread_id);
527 DummyAudioBackend::join_process_threads ()
531 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
534 if (pthread_join (*i, &status)) {
535 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
544 DummyAudioBackend::in_process_thread ()
546 if (pthread_equal (_main_thread, pthread_self()) != 0) {
550 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
552 if (pthread_equal (*i, pthread_self ()) != 0) {
560 DummyAudioBackend::process_thread_count ()
562 return _threads.size ();
566 DummyAudioBackend::update_latencies ()
568 // trigger latency callback in RT thread (locked graph)
569 port_connect_add_remove_callback();
575 DummyAudioBackend::private_handle () const
581 DummyAudioBackend::my_name () const
583 return _instance_name;
587 DummyAudioBackend::available () const
593 DummyAudioBackend::port_name_size () const
599 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
601 if (!valid_port (port)) {
602 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
605 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
609 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
611 if (!valid_port (port)) {
612 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
613 return std::string ();
615 return static_cast<DummyPort*>(port)->name ();
618 PortEngine::PortHandle
619 DummyAudioBackend::get_port_by_name (const std::string& name) const
621 PortHandle port = (PortHandle) find_port (name);
626 DummyAudioBackend::get_ports (
627 const std::string& port_name_pattern,
628 DataType type, PortFlags flags,
629 std::vector<std::string>& port_names) const
633 bool use_regexp = false;
634 if (port_name_pattern.size () > 0) {
635 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
639 for (size_t i = 0; i < _ports.size (); ++i) {
640 DummyPort* port = _ports[i];
641 if ((port->type () == type) && (port->flags () & flags)) {
642 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
643 port_names.push_back (port->name ());
649 regfree (&port_regex);
655 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
657 if (!valid_port (port)) {
658 return DataType::NIL;
660 return static_cast<DummyPort*>(port)->type ();
663 PortEngine::PortHandle
664 DummyAudioBackend::register_port (
665 const std::string& name,
666 ARDOUR::DataType type,
667 ARDOUR::PortFlags flags)
669 if (name.size () == 0) { return 0; }
670 if (flags & IsPhysical) { return 0; }
672 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
674 return add_port (_instance_name + ":" + name, type, flags);
677 PortEngine::PortHandle
678 DummyAudioBackend::add_port (
679 const std::string& name,
680 ARDOUR::DataType type,
681 ARDOUR::PortFlags flags)
683 assert(name.size ());
684 if (find_port (name)) {
685 PBD::error << _("DummyBackend::register_port: Port already exists:")
686 << " (" << name << ")" << endmsg;
689 DummyPort* port = NULL;
691 case DataType::AUDIO:
692 port = new DummyAudioPort (*this, name, flags);
695 port = new DummyMidiPort (*this, name, flags);
698 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
702 _ports.push_back (port);
708 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
711 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
712 assert (!valid_port (port_handle));
715 DummyPort* port = static_cast<DummyPort*>(port_handle);
716 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
717 if (i == _ports.end ()) {
718 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
721 disconnect_all(port_handle);
727 DummyAudioBackend::register_system_ports()
730 enum DummyAudioPort::GeneratorType gt;
731 if (_device == _("Uniform White Noise")) {
732 gt = DummyAudioPort::UniformWhiteNoise;
733 } else if (_device == _("Gaussian White Noise")) {
734 gt = DummyAudioPort::GaussianWhiteNoise;
735 } else if (_device == _("Pink Noise")) {
736 gt = DummyAudioPort::PinkNoise;
737 } else if (_device == _("Pink Noise (low CPU)")) {
738 gt = DummyAudioPort::PonyNoise;
739 } else if (_device == _("Sine Wave")) {
740 gt = DummyAudioPort::SineWave;
741 } else if (_device == _("Square Wave")) {
742 gt = DummyAudioPort::SquareWave;
743 } else if (_device == _("Impulses")) {
744 gt = DummyAudioPort::KronekerDelta;
745 } else if (_device == _("Sine Sweep")) {
746 gt = DummyAudioPort::SineSweep;
747 } else if (_device == _("Sine Sweep Swell")) {
748 gt = DummyAudioPort::SineSweepSwell;
749 } else if (_device == _("Square Sweep")) {
750 gt = DummyAudioPort::SquareSweep;
751 } else if (_device == _("Square Sweep Swell")) {
752 gt = DummyAudioPort::SquareSweepSwell;
753 } else if (_device == _("Loopback")) {
754 gt = DummyAudioPort::Loopback;
756 gt = DummyAudioPort::Silence;
759 if (_midi_mode == MidiToAudio) {
760 gt = DummyAudioPort::Loopback;
763 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
764 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
765 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
766 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
768 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
769 const size_t l_in = _samples_per_period * .25;
770 const size_t l_out = _samples_per_period - l_in;
773 lr.min = lr.max = l_in + _systemic_input_latency;
774 for (int i = 1; i <= a_ins; ++i) {
776 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
777 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
779 set_latency_range (p, false, lr);
780 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
781 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
784 lr.min = lr.max = l_out + _systemic_output_latency;
785 for (int i = 1; i <= a_out; ++i) {
787 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
788 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
790 set_latency_range (p, true, lr);
791 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
795 lr.min = lr.max = l_in + _systemic_input_latency;
796 for (int i = 0; i < m_ins; ++i) {
798 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
799 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
801 set_latency_range (p, false, lr);
802 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
803 if (_midi_mode == MidiGenerator) {
804 static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
808 lr.min = lr.max = l_out + _systemic_output_latency;
809 for (int i = 1; i <= m_out; ++i) {
811 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
812 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
814 set_latency_range (p, true, lr);
815 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
821 DummyAudioBackend::unregister_ports (bool system_only)
824 _system_inputs.clear();
825 _system_outputs.clear();
826 _system_midi_in.clear();
827 _system_midi_out.clear();
828 while (i < _ports.size ()) {
829 DummyPort* port = _ports[i];
830 if (! system_only || (port->is_physical () && port->is_terminal ())) {
831 port->disconnect_all ();
833 _ports.erase (_ports.begin() + i);
841 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
843 DummyPort* src_port = find_port (src);
844 DummyPort* dst_port = find_port (dst);
847 PBD::error << _("DummyBackend::connect: Invalid Source port:")
848 << " (" << src <<")" << endmsg;
852 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
853 << " (" << dst <<")" << endmsg;
856 return src_port->connect (dst_port);
860 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
862 DummyPort* src_port = find_port (src);
863 DummyPort* dst_port = find_port (dst);
865 if (!src_port || !dst_port) {
866 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
869 return src_port->disconnect (dst_port);
873 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
875 DummyPort* dst_port = find_port (dst);
876 if (!valid_port (src)) {
877 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
881 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
882 << " (" << dst << ")" << endmsg;
885 return static_cast<DummyPort*>(src)->connect (dst_port);
889 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
891 DummyPort* dst_port = find_port (dst);
892 if (!valid_port (src) || !dst_port) {
893 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
896 return static_cast<DummyPort*>(src)->disconnect (dst_port);
900 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
902 if (!valid_port (port)) {
903 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
906 static_cast<DummyPort*>(port)->disconnect_all ();
911 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
913 if (!valid_port (port)) {
914 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
917 return static_cast<DummyPort*>(port)->is_connected ();
921 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
923 DummyPort* dst_port = find_port (dst);
924 if (!valid_port (src) || !dst_port) {
925 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
928 return static_cast<DummyPort*>(src)->is_connected (dst_port);
932 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
934 if (!valid_port (port)) {
935 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
938 return static_cast<DummyPort*>(port)->is_physically_connected ();
942 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
944 if (!valid_port (port)) {
945 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
949 assert (0 == names.size ());
951 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
953 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
954 names.push_back ((*i)->name ());
957 return (int)names.size ();
962 DummyAudioBackend::midi_event_get (
963 pframes_t& timestamp,
964 size_t& size, uint8_t** buf, void* port_buffer,
965 uint32_t event_index)
967 assert (buf && port_buffer);
968 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
969 if (event_index >= source.size ()) {
972 DummyMidiEvent * const event = source[event_index].get ();
974 timestamp = event->timestamp ();
975 size = event->size ();
976 *buf = event->data ();
981 DummyAudioBackend::midi_event_put (
984 const uint8_t* buffer, size_t size)
986 assert (buffer && port_buffer);
987 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
988 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
989 fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
992 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
997 DummyAudioBackend::get_midi_event_count (void* port_buffer)
999 assert (port_buffer);
1000 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1004 DummyAudioBackend::midi_clear (void* port_buffer)
1006 assert (port_buffer);
1007 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1015 DummyAudioBackend::can_monitor_input () const
1021 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1027 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1033 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1038 /* Latency management */
1041 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1043 if (!valid_port (port)) {
1044 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1046 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1050 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;
1059 return static_cast<DummyPort*>(port)->latency_range (for_playback);
1062 /* Discovering physical ports */
1065 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1067 if (!valid_port (port)) {
1068 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1071 return static_cast<DummyPort*>(port)->is_physical ();
1075 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1077 for (size_t i = 0; i < _ports.size (); ++i) {
1078 DummyPort* port = _ports[i];
1079 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1080 port_names.push_back (port->name ());
1086 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1088 for (size_t i = 0; i < _ports.size (); ++i) {
1089 DummyPort* port = _ports[i];
1090 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1091 port_names.push_back (port->name ());
1097 DummyAudioBackend::n_physical_outputs () const
1101 for (size_t i = 0; i < _ports.size (); ++i) {
1102 DummyPort* port = _ports[i];
1103 if (port->is_output () && port->is_physical ()) {
1104 switch (port->type ()) {
1105 case DataType::AUDIO: ++n_audio; break;
1106 case DataType::MIDI: ++n_midi; break;
1112 cc.set (DataType::AUDIO, n_audio);
1113 cc.set (DataType::MIDI, n_midi);
1118 DummyAudioBackend::n_physical_inputs () const
1122 for (size_t i = 0; i < _ports.size (); ++i) {
1123 DummyPort* port = _ports[i];
1124 if (port->is_input () && port->is_physical ()) {
1125 switch (port->type ()) {
1126 case DataType::AUDIO: ++n_audio; break;
1127 case DataType::MIDI: ++n_midi; break;
1133 cc.set (DataType::AUDIO, n_audio);
1134 cc.set (DataType::MIDI, n_midi);
1138 /* Getting access to the data buffer for a port */
1141 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1144 assert (valid_port (port));
1145 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1148 /* Engine Process */
1150 DummyAudioBackend::main_process_thread ()
1152 AudioEngine::thread_init_callback (this);
1154 _processed_samples = 0;
1156 manager.registration_callback();
1157 manager.graph_order_callback();
1159 int64_t clock1, clock2;
1160 clock1 = _x_get_monotonic_usec();
1163 if (_freewheeling != _freewheel) {
1164 _freewheel = _freewheeling;
1165 engine.freewheel_callback (_freewheel);
1168 // re-set input buffers, generate on demand.
1169 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1170 (*it)->next_period();
1172 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1173 (*it)->next_period();
1176 if (engine.process_callback (_samples_per_period)) {
1179 _processed_samples += _samples_per_period;
1181 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1183 int opc = _system_outputs.size();
1184 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1185 DummyAudioPort* op = _system_outputs[(opn % opc)];
1186 (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
1190 if (_midi_mode == MidiLoopback) {
1192 int opc = _system_midi_out.size();
1193 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1194 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1195 op->get_buffer(0); // mix-down
1196 (*it)->set_loopback (op->const_buffer());
1199 else if (_midi_mode == MidiToAudio) {
1201 int opc = _system_midi_out.size();
1202 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1203 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1204 op->get_buffer(0); // mix-down
1205 (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
1210 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1211 clock2 = _x_get_monotonic_usec();
1212 #ifdef PLATFORM_WINDOWS
1213 bool win_timers_ok = true;
1214 /* querying the performance counter can fail occasionally (-1).
1215 * Also on some multi-core systems, timers are CPU specific and not
1216 * synchronized. We assume they differ more than a few milliseconds
1217 * (4 * nominal cycle time) and simply ignore cases where the
1218 * execution switches cores.
1220 if (clock1 < 0 || clock2 < 0 || (clock1 > clock2) || (clock2 - clock1) > 4 * nomial_time) {
1221 clock2 = clock1 = 0;
1222 win_timers_ok = false;
1225 const int64_t elapsed_time = clock2 - clock1;
1226 #ifdef PLATFORM_WINDOWS
1229 { // low pass filter
1230 _dsp_load = _dsp_load + .05 * ((elapsed_time / (float) nomial_time) - _dsp_load) + 1e-12;
1233 if (elapsed_time < nomial_time) {
1234 Glib::usleep (nomial_time - elapsed_time);
1236 Glib::usleep (100); // don't hog cpu
1240 Glib::usleep (100); // don't hog cpu
1243 /* beginning of netx cycle */
1244 clock1 = _x_get_monotonic_usec();
1246 bool connections_changed = false;
1247 bool ports_changed = false;
1248 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1249 if (_port_change_flag) {
1250 ports_changed = true;
1251 _port_change_flag = false;
1253 if (!_port_connection_queue.empty ()) {
1254 connections_changed = true;
1256 while (!_port_connection_queue.empty ()) {
1257 PortConnectData *c = _port_connection_queue.back ();
1258 manager.connect_callback (c->a, c->b, c->c);
1259 _port_connection_queue.pop_back ();
1262 pthread_mutex_unlock (&_port_callback_mutex);
1264 if (ports_changed) {
1265 manager.registration_callback();
1267 if (connections_changed) {
1268 manager.graph_order_callback();
1270 if (connections_changed || ports_changed) {
1271 engine.latency_callback(false);
1272 engine.latency_callback(true);
1281 /******************************************************************************/
1283 static boost::shared_ptr<DummyAudioBackend> _instance;
1285 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1286 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1287 static int deinstantiate ();
1288 static bool already_configured ();
1289 static bool available ();
1291 static ARDOUR::AudioBackendInfo _descriptor = {
1300 static boost::shared_ptr<AudioBackend>
1301 backend_factory (AudioEngine& e)
1304 _instance.reset (new DummyAudioBackend (e, _descriptor));
1310 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1312 s_instance_name = arg1;
1313 #ifdef PLATFORM_WINDOWS
1314 LARGE_INTEGER Frequency;
1315 if (!QueryPerformanceFrequency(&Frequency) || Frequency.QuadPart < 1) {
1318 _win_pc_rate = 1000000.0 / Frequency.QuadPart;
1332 already_configured ()
1335 return _instance->is_running();
1346 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1348 return &_descriptor;
1352 /******************************************************************************/
1353 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1354 : _dummy_backend (b)
1358 , _gen_cycle (false)
1360 _capture_latency_range.min = 0;
1361 _capture_latency_range.max = 0;
1362 _playback_latency_range.min = 0;
1363 _playback_latency_range.max = 0;
1364 _dummy_backend.port_connect_add_remove_callback();
1367 DummyPort::~DummyPort () {
1369 _dummy_backend.port_connect_add_remove_callback();
1373 int DummyPort::connect (DummyPort *port)
1376 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1380 if (type () != port->type ()) {
1381 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1385 if (is_output () && port->is_output ()) {
1386 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1390 if (is_input () && port->is_input ()) {
1391 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1396 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1400 if (is_connected (port)) {
1401 #if 0 // don't bother to warn about this for now. just ignore it
1402 PBD::error << _("DummyPort::connect (): ports are already connected:")
1403 << " (" << name () << ") -> (" << port->name () << ")"
1409 _connect (port, true);
1414 void DummyPort::_connect (DummyPort *port, bool callback)
1416 _connections.push_back (port);
1418 port->_connect (this, false);
1419 _dummy_backend.port_connect_callback (name(), port->name(), true);
1423 int DummyPort::disconnect (DummyPort *port)
1426 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1430 if (!is_connected (port)) {
1431 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1432 << " (" << name () << ") -> (" << port->name () << ")"
1436 _disconnect (port, true);
1440 void DummyPort::_disconnect (DummyPort *port, bool callback)
1442 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1444 assert (it != _connections.end ());
1446 _connections.erase (it);
1449 port->_disconnect (this, false);
1450 _dummy_backend.port_connect_callback (name(), port->name(), false);
1455 void DummyPort::disconnect_all ()
1457 while (!_connections.empty ()) {
1458 _connections.back ()->_disconnect (this, false);
1459 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1460 _connections.pop_back ();
1465 DummyPort::is_connected (const DummyPort *port) const
1467 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1470 bool DummyPort::is_physically_connected () const
1472 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1473 if ((*it)->is_physical ()) {
1480 void DummyPort::setup_random_number_generator ()
1482 #ifdef PLATFORM_WINDOWS
1483 LARGE_INTEGER Count;
1484 if (QueryPerformanceCounter (&Count)) {
1485 _rseed = Count.QuadPart % UINT_MAX;
1489 _rseed = g_get_monotonic_time() % UINT_MAX;
1491 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1497 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1498 // http://www.firstpr.com.au/dsp/rand31/
1500 lo = 16807 * (_rseed & 0xffff);
1501 hi = 16807 * (_rseed >> 16);
1503 lo += (hi & 0x7fff) << 16;
1506 lo = (lo & 0x7fffffff) + (lo >> 31);
1508 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1510 return (_rseed = lo);
1516 return (randi() / 1073741824.f) - 1.f;
1519 /******************************************************************************/
1521 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1522 : DummyPort (b, name, flags)
1523 , _gen_type (Silence)
1539 memset (_buffer, 0, sizeof (_buffer));
1542 DummyAudioPort::~DummyAudioPort () {
1547 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1549 DummyPort::setup_random_number_generator();
1552 switch (_gen_type) {
1555 case UniformWhiteNoise:
1556 case GaussianWhiteNoise:
1560 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1563 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1566 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1567 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1568 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1569 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1573 case SquareSweepSwell:
1575 case SineSweepSwell:
1577 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1579 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1580 const double f_min = 20.;
1581 const double f_max = samplerate * .5;
1582 const double g_p2 = _gen_period * .5;
1584 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1585 const double a = f_min / samplerate;
1587 const double b = log (f_max / f_min) / g_p2;
1588 const double a = f_min / (b * samplerate);
1590 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1591 for (uint32_t i = 0 ; i < g_p2; ++i) {
1593 const double phase = i * (a + b * i);
1595 const double phase = a * exp (b * i) - a;
1597 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1599 for (uint32_t i = g_p2; i < _gen_period; ++i) {
1600 const uint32_t j = _gen_period - i;
1602 const double phase = j * (a + b * j);
1604 const double phase = a * exp (b * j) - a;
1606 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1608 if (_gen_type == SquareSweep) {
1609 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1610 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1613 else if (_gen_type == SquareSweepSwell) {
1614 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1615 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1621 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1626 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1628 memset(_wavetable, 0, n_samples * sizeof(float));
1629 /* generate an audio spike for every midi message
1630 * to verify layency-compensation alignment
1631 * (here: midi-out playback-latency + audio-in capture-latency)
1633 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1634 const pframes_t t = (*it)->timestamp();
1635 assert(t < n_samples);
1636 // somewhat arbitrary mapping for quick visual feedback
1638 if ((*it)->size() == 3) {
1639 const unsigned char *d = (*it)->const_data();
1640 if ((d[0] & 0xf0) == 0x90) { // note on
1641 v = .25f + d[2] / 512.f;
1643 else if ((d[0] & 0xf0) == 0x80) { // note off
1644 v = .3f - d[2] / 640.f;
1646 else if ((d[0] & 0xf0) == 0xb0) { // CC
1647 v = -.1f - d[2] / 256.f;
1654 float DummyAudioPort::grandf ()
1656 // Gaussian White Noise
1657 // http://www.musicdsp.org/archive.php?classid=0#109
1668 r = x1 * x1 + x2 * x2;
1669 } while ((r >= 1.0f) || (r < 1e-22f));
1671 r = sqrtf (-2.f * logf (r) / r);
1678 void DummyAudioPort::generate (const pframes_t n_samples)
1680 Glib::Threads::Mutex::Lock lm (generator_lock);
1685 switch (_gen_type) {
1687 memset (_buffer, 0, n_samples * sizeof (Sample));
1690 assert(_gen_period > 0);
1691 for (pframes_t i = 0 ; i < n_samples; ++i) {
1692 if (_gen_offset < _gen_period * .5f) {
1693 _buffer[i] = .40709f; // -6dBFS
1695 _buffer[i] = -.40709f;
1697 _gen_offset = (_gen_offset + 1) % _gen_period;
1701 assert(_gen_period > 0);
1702 memset (_buffer, 0, n_samples * sizeof (Sample));
1703 for (pframes_t i = 0; i < n_samples; ++i) {
1704 if (_gen_offset == 0) {
1707 _gen_offset = (_gen_offset + 1) % _gen_period;
1710 case SineSweepSwell:
1711 case SquareSweepSwell:
1712 assert(_wavetable && _gen_period > 0);
1714 const float vols = 2.f / (float)_gen_perio2;
1715 for (pframes_t i = 0; i < n_samples; ++i) {
1716 const float g = fabsf (_gen_count2 * vols - 1.0);
1717 _buffer[i] = g * _wavetable[_gen_offset];
1718 _gen_offset = (_gen_offset + 1) % _gen_period;
1719 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1724 _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
1728 assert(_wavetable && _gen_period > 0);
1730 pframes_t written = 0;
1731 while (written < n_samples) {
1732 const uint32_t remain = n_samples - written;
1733 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
1734 memcpy((void*)&_buffer[written],
1735 (void*)&_wavetable[_gen_offset],
1736 to_copy * sizeof(Sample));
1738 _gen_offset = (_gen_offset + to_copy) % _gen_period;
1742 case UniformWhiteNoise:
1743 for (pframes_t i = 0 ; i < n_samples; ++i) {
1744 _buffer[i] = .158489f * randf();
1747 case GaussianWhiteNoise:
1748 for (pframes_t i = 0 ; i < n_samples; ++i) {
1749 _buffer[i] = .089125f * grandf();
1753 for (pframes_t i = 0 ; i < n_samples; ++i) {
1754 // Paul Kellet's refined method
1755 // http://www.musicdsp.org/files/pink.txt
1756 // NB. If 'white' consists of uniform random numbers,
1757 // the pink noise will have an almost gaussian distribution.
1758 const float white = .0498f * randf ();
1759 _b0 = .99886f * _b0 + white * .0555179f;
1760 _b1 = .99332f * _b1 + white * .0750759f;
1761 _b2 = .96900f * _b2 + white * .1538520f;
1762 _b3 = .86650f * _b3 + white * .3104856f;
1763 _b4 = .55000f * _b4 + white * .5329522f;
1764 _b5 = -.7616f * _b5 - white * .0168980f;
1765 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
1766 _b6 = white * 0.115926f;
1770 for (pframes_t i = 0 ; i < n_samples; ++i) {
1771 const float white = 0.0498f * randf ();
1772 // Paul Kellet's economy method
1773 // http://www.musicdsp.org/files/pink.txt
1774 _b0 = 0.99765f * _b0 + white * 0.0990460f;
1775 _b1 = 0.96300f * _b1 + white * 0.2965164f;
1776 _b2 = 0.57000f * _b2 + white * 1.0526913f;
1777 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
1784 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1787 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1788 if (it == get_connections ().end ()) {
1789 memset (_buffer, 0, n_samples * sizeof (Sample));
1791 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1792 assert (source && source->is_output ());
1793 if (source->is_physical() && source->is_terminal()) {
1794 source->get_buffer(n_samples); // generate signal.
1796 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1797 while (++it != get_connections ().end ()) {
1798 source = static_cast<DummyAudioPort*>(*it);
1799 assert (source && source->is_output ());
1800 Sample* dst = buffer ();
1801 if (source->is_physical() && source->is_terminal()) {
1802 source->get_buffer(n_samples); // generate signal.
1804 const Sample* src = source->const_buffer ();
1805 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1810 } else if (is_output () && is_physical () && is_terminal()) {
1812 generate(n_samples);
1819 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1820 : DummyPort (b, name, flags)
1822 , _midi_seq_time (0)
1829 DummyMidiPort::~DummyMidiPort () {
1834 struct MidiEventSorter {
1835 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1840 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
1843 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1844 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1848 void DummyMidiPort::setup_generator (int seq_id, const float sr)
1850 DummyPort::setup_random_number_generator();
1851 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
1852 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
1857 void DummyMidiPort::midi_generate (const pframes_t n_samples)
1859 Glib::Threads::Mutex::Lock lm (generator_lock);
1867 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
1868 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
1869 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1875 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
1876 if (ev_beat_time < 0) {
1879 if ((pframes_t) ev_beat_time >= n_samples) {
1882 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
1884 _midi_seq_dat[_midi_seq_pos].event,
1885 _midi_seq_dat[_midi_seq_pos].size
1889 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
1890 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
1894 _midi_seq_time += n_samples;
1898 void* DummyMidiPort::get_buffer (pframes_t n_samples)
1902 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1903 i != get_connections ().end ();
1905 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
1906 if (source->is_physical() && source->is_terminal()) {
1907 source->get_buffer(n_samples); // generate signal.
1909 const DummyMidiBuffer *src = source->const_buffer ();
1910 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1911 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1914 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1915 } else if (is_output () && is_physical () && is_terminal()) {
1917 midi_generate(n_samples);
1923 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1925 , _timestamp (timestamp)
1929 _data = (uint8_t*) malloc (size);
1930 memcpy (_data, data, size);
1934 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
1935 : _size (other.size ())
1936 , _timestamp (other.timestamp ())
1939 if (other.size () && other.const_data ()) {
1940 _data = (uint8_t*) malloc (other.size ());
1941 memcpy (_data, other.const_data (), other.size ());
1945 DummyMidiEvent::~DummyMidiEvent () {