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 std::vector<DummyAudioBackend::DriverSpeed> DummyAudioBackend::_driver_speed;
46 #ifdef PLATFORM_WINDOWS
47 static double _win_pc_rate = 0; // usec per tick
50 static int64_t _x_get_monotonic_usec() {
51 #ifdef PLATFORM_WINDOWS
52 if (_win_pc_rate > 0) {
54 // not very reliable, but the only realistic way for sub milli-seconds
55 if (QueryPerformanceCounter (&Count)) {
56 return (int64_t) (Count.QuadPart * _win_pc_rate);
61 return g_get_monotonic_time();
64 DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
65 : AudioBackend (e, info)
68 , _freewheeling (false)
72 , _samples_per_period (1024)
78 , _midi_mode (MidiNoEvents)
79 , _systemic_input_latency (0)
80 , _systemic_output_latency (0)
81 , _processed_samples (0)
82 , _port_change_flag (false)
84 _instance_name = s_instance_name;
85 _device = _("Silence");
86 pthread_mutex_init (&_port_callback_mutex, 0);
89 DummyAudioBackend::~DummyAudioBackend ()
91 pthread_mutex_destroy (&_port_callback_mutex);
94 /* AUDIOBACKEND API */
97 DummyAudioBackend::name () const
99 return X_("Dummy"); // internal name
103 DummyAudioBackend::is_realtime () const
108 std::vector<AudioBackend::DeviceStatus>
109 DummyAudioBackend::enumerate_devices () const
111 if (_device_status.empty()) {
112 _device_status.push_back (DeviceStatus (_("Silence"), true));
113 _device_status.push_back (DeviceStatus (_("Sine Wave"), true));
114 _device_status.push_back (DeviceStatus (_("Square Wave"), true));
115 _device_status.push_back (DeviceStatus (_("Impulses"), true));
116 _device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
117 _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
118 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
119 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
120 _device_status.push_back (DeviceStatus (_("Sine Sweep"), true));
121 _device_status.push_back (DeviceStatus (_("Sine Sweep Swell"), true));
122 _device_status.push_back (DeviceStatus (_("Square Sweep"), true));
123 _device_status.push_back (DeviceStatus (_("Square Sweep Swell"), true));
124 _device_status.push_back (DeviceStatus (_("Loopback"), true));
126 return _device_status;
130 DummyAudioBackend::available_sample_rates (const std::string&) const
132 std::vector<float> sr;
133 sr.push_back (8000.0);
134 sr.push_back (22050.0);
135 sr.push_back (24000.0);
136 sr.push_back (44100.0);
137 sr.push_back (48000.0);
138 sr.push_back (88200.0);
139 sr.push_back (96000.0);
140 sr.push_back (176400.0);
141 sr.push_back (192000.0);
145 std::vector<uint32_t>
146 DummyAudioBackend::available_buffer_sizes (const std::string&) const
148 std::vector<uint32_t> bs;
165 DummyAudioBackend::available_input_channel_count (const std::string&) const
171 DummyAudioBackend::available_output_channel_count (const std::string&) const
177 DummyAudioBackend::can_change_sample_rate_when_running () const
183 DummyAudioBackend::can_change_buffer_size_when_running () const
188 std::vector<std::string>
189 DummyAudioBackend::enumerate_drivers () const
191 if (_driver_speed.empty()) {
192 _driver_speed.push_back (DriverSpeed (_("Half Speed"), 2.0f));
193 _driver_speed.push_back (DriverSpeed (_("Normal Speed"), 1.0f));
194 _driver_speed.push_back (DriverSpeed (_("Double Speed"), 0.5f));
195 _driver_speed.push_back (DriverSpeed (_("5x Speed"), 0.2f));
196 _driver_speed.push_back (DriverSpeed (_("10x Speed"), 0.1f));
197 _driver_speed.push_back (DriverSpeed (_("15x Speed"), 0.06666f));
198 _driver_speed.push_back (DriverSpeed (_("20x Speed"), 0.05f));
199 _driver_speed.push_back (DriverSpeed (_("50x Speed"), 0.02f));
202 std::vector<std::string> speed_drivers;
203 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
204 speed_drivers.push_back (it->name);
206 return speed_drivers;
210 DummyAudioBackend::driver_name () const
212 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
213 if (rintf (1e6f * _speedup) == rintf (1e6f * it->speedup)) {
218 return _("Normal Speed");
222 DummyAudioBackend::set_driver (const std::string& d)
224 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
226 _speedup = it->speedup;
234 DummyAudioBackend::set_device_name (const std::string& d)
241 DummyAudioBackend::set_sample_rate (float sr)
243 if (sr <= 0) { return -1; }
245 engine.sample_rate_change (sr);
250 DummyAudioBackend::set_buffer_size (uint32_t bs)
252 if (bs <= 0 || bs >= _max_buffer_size) {
255 _samples_per_period = bs;
257 /* update port latencies
258 * with 'Loopback' there is exactly once cycle latency,
259 * divide it between In + Out;
262 lr.min = lr.max = _systemic_input_latency;
263 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
264 set_latency_range (*it, false, lr);
266 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
267 set_latency_range (*it, false, lr);
270 lr.min = lr.max = _systemic_output_latency;
271 for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
272 set_latency_range (*it, true, lr);
274 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
275 set_latency_range (*it, true, lr);
278 engine.buffer_size_change (bs);
283 DummyAudioBackend::set_interleaved (bool yn)
285 if (!yn) { return 0; }
290 DummyAudioBackend::set_input_channels (uint32_t cc)
297 DummyAudioBackend::set_output_channels (uint32_t cc)
304 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
306 _systemic_input_latency = sl;
311 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
313 _systemic_output_latency = sl;
317 /* Retrieving parameters */
319 DummyAudioBackend::device_name () const
325 DummyAudioBackend::sample_rate () const
331 DummyAudioBackend::buffer_size () const
333 return _samples_per_period;
337 DummyAudioBackend::interleaved () const
343 DummyAudioBackend::input_channels () const
349 DummyAudioBackend::output_channels () const
355 DummyAudioBackend::systemic_input_latency () const
357 return _systemic_input_latency;
361 DummyAudioBackend::systemic_output_latency () const
363 return _systemic_output_latency;
368 std::vector<std::string>
369 DummyAudioBackend::enumerate_midi_options () const
371 if (_midi_options.empty()) {
372 _midi_options.push_back (_("1 in, 1 out, Silence"));
373 _midi_options.push_back (_("2 in, 2 out, Silence"));
374 _midi_options.push_back (_("8 in, 8 out, Silence"));
375 _midi_options.push_back (_("Midi Event Generators"));
376 _midi_options.push_back (_("8 in, 8 out, Loopback"));
377 _midi_options.push_back (_("MIDI to Audio, Loopback"));
378 _midi_options.push_back (_("No MIDI I/O"));
380 return _midi_options;
384 DummyAudioBackend::set_midi_option (const std::string& opt)
386 _midi_mode = MidiNoEvents;
387 if (opt == _("1 in, 1 out, Silence")) {
388 _n_midi_inputs = _n_midi_outputs = 1;
390 else if (opt == _("2 in, 2 out, Silence")) {
391 _n_midi_inputs = _n_midi_outputs = 2;
393 else if (opt == _("8 in, 8 out, Silence")) {
394 _n_midi_inputs = _n_midi_outputs = 8;
396 else if (opt == _("Midi Event Generators")) {
397 _n_midi_inputs = _n_midi_outputs = NUM_MIDI_EVENT_GENERATORS;
398 _midi_mode = MidiGenerator;
400 else if (opt == _("8 in, 8 out, Loopback")) {
401 _n_midi_inputs = _n_midi_outputs = 8;
402 _midi_mode = MidiLoopback;
404 else if (opt == _("MIDI to Audio, Loopback")) {
405 _n_midi_inputs = _n_midi_outputs = UINT32_MAX;
406 _midi_mode = MidiToAudio;
409 _n_midi_inputs = _n_midi_outputs = 0;
415 DummyAudioBackend::midi_option () const
422 static void * pthread_process (void *arg)
424 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
425 d->main_process_thread ();
431 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
434 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
439 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
440 for (std::vector<DummyPort*>::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
441 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
443 _system_inputs.clear();
444 _system_outputs.clear();
445 _system_midi_in.clear();
446 _system_midi_out.clear();
450 if (register_system_ports()) {
451 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
455 engine.sample_rate_change (_samplerate);
456 engine.buffer_size_change (_samples_per_period);
458 if (engine.reestablish_ports ()) {
459 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
464 engine.reconnect_ports ();
465 _port_change_flag = false;
467 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
468 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
472 while (!_running && --timeout > 0) { Glib::usleep (1000); }
474 if (timeout == 0 || !_running) {
475 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
483 DummyAudioBackend::stop ()
491 if (pthread_join (_main_thread, &status)) {
492 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
500 DummyAudioBackend::freewheel (bool onoff)
502 _freewheeling = onoff;
507 DummyAudioBackend::dsp_load () const
509 return 100.f * _dsp_load;
513 DummyAudioBackend::raw_buffer_size (DataType t)
516 case DataType::AUDIO:
517 return _samples_per_period * sizeof(Sample);
519 return _max_buffer_size; // XXX not really limited
526 DummyAudioBackend::sample_time ()
528 return _processed_samples;
532 DummyAudioBackend::sample_time_at_cycle_start ()
534 return _processed_samples;
538 DummyAudioBackend::samples_since_cycle_start ()
545 DummyAudioBackend::dummy_process_thread (void *arg)
547 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
548 boost::function<void ()> f = td->f;
555 DummyAudioBackend::create_process_thread (boost::function<void()> func)
559 size_t stacksize = 100000;
561 pthread_attr_init (&attr);
562 pthread_attr_setstacksize (&attr, stacksize);
563 ThreadData* td = new ThreadData (this, func, stacksize);
565 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
566 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
567 pthread_attr_destroy (&attr);
570 pthread_attr_destroy (&attr);
572 _threads.push_back (thread_id);
577 DummyAudioBackend::join_process_threads ()
581 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
584 if (pthread_join (*i, &status)) {
585 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
594 DummyAudioBackend::in_process_thread ()
596 if (pthread_equal (_main_thread, pthread_self()) != 0) {
600 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
602 if (pthread_equal (*i, pthread_self ()) != 0) {
610 DummyAudioBackend::process_thread_count ()
612 return _threads.size ();
616 DummyAudioBackend::update_latencies ()
618 // trigger latency callback in RT thread (locked graph)
619 port_connect_add_remove_callback();
625 DummyAudioBackend::private_handle () const
631 DummyAudioBackend::my_name () const
633 return _instance_name;
637 DummyAudioBackend::available () const
643 DummyAudioBackend::port_name_size () const
649 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
651 if (!valid_port (port)) {
652 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
655 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
659 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
661 if (!valid_port (port)) {
662 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
663 return std::string ();
665 return static_cast<DummyPort*>(port)->name ();
668 PortEngine::PortHandle
669 DummyAudioBackend::get_port_by_name (const std::string& name) const
671 PortHandle port = (PortHandle) find_port (name);
676 DummyAudioBackend::get_ports (
677 const std::string& port_name_pattern,
678 DataType type, PortFlags flags,
679 std::vector<std::string>& port_names) const
683 bool use_regexp = false;
684 if (port_name_pattern.size () > 0) {
685 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
689 for (size_t i = 0; i < _ports.size (); ++i) {
690 DummyPort* port = _ports[i];
691 if ((port->type () == type) && flags == (port->flags () & flags)) {
692 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
693 port_names.push_back (port->name ());
699 regfree (&port_regex);
705 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
707 if (!valid_port (port)) {
708 return DataType::NIL;
710 return static_cast<DummyPort*>(port)->type ();
713 PortEngine::PortHandle
714 DummyAudioBackend::register_port (
715 const std::string& name,
716 ARDOUR::DataType type,
717 ARDOUR::PortFlags flags)
719 if (name.size () == 0) { return 0; }
720 if (flags & IsPhysical) { return 0; }
722 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
724 return add_port (_instance_name + ":" + name, type, flags);
727 PortEngine::PortHandle
728 DummyAudioBackend::add_port (
729 const std::string& name,
730 ARDOUR::DataType type,
731 ARDOUR::PortFlags flags)
733 assert(name.size ());
734 if (find_port (name)) {
735 PBD::error << _("DummyBackend::register_port: Port already exists:")
736 << " (" << name << ")" << endmsg;
739 DummyPort* port = NULL;
741 case DataType::AUDIO:
742 port = new DummyAudioPort (*this, name, flags);
745 port = new DummyMidiPort (*this, name, flags);
748 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
752 _ports.push_back (port);
758 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
761 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
762 assert (!valid_port (port_handle));
765 DummyPort* port = static_cast<DummyPort*>(port_handle);
766 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
767 if (i == _ports.end ()) {
768 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
771 disconnect_all(port_handle);
777 DummyAudioBackend::register_system_ports()
780 enum DummyAudioPort::GeneratorType gt;
781 if (_device == _("Uniform White Noise")) {
782 gt = DummyAudioPort::UniformWhiteNoise;
783 } else if (_device == _("Gaussian White Noise")) {
784 gt = DummyAudioPort::GaussianWhiteNoise;
785 } else if (_device == _("Pink Noise")) {
786 gt = DummyAudioPort::PinkNoise;
787 } else if (_device == _("Pink Noise (low CPU)")) {
788 gt = DummyAudioPort::PonyNoise;
789 } else if (_device == _("Sine Wave")) {
790 gt = DummyAudioPort::SineWave;
791 } else if (_device == _("Square Wave")) {
792 gt = DummyAudioPort::SquareWave;
793 } else if (_device == _("Impulses")) {
794 gt = DummyAudioPort::KronekerDelta;
795 } else if (_device == _("Sine Sweep")) {
796 gt = DummyAudioPort::SineSweep;
797 } else if (_device == _("Sine Sweep Swell")) {
798 gt = DummyAudioPort::SineSweepSwell;
799 } else if (_device == _("Square Sweep")) {
800 gt = DummyAudioPort::SquareSweep;
801 } else if (_device == _("Square Sweep Swell")) {
802 gt = DummyAudioPort::SquareSweepSwell;
803 } else if (_device == _("Loopback")) {
804 gt = DummyAudioPort::Loopback;
806 gt = DummyAudioPort::Silence;
809 if (_midi_mode == MidiToAudio) {
810 gt = DummyAudioPort::Loopback;
813 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
814 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
815 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
816 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
820 lr.min = lr.max = _systemic_input_latency;
821 for (int i = 1; i <= a_ins; ++i) {
823 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
824 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
826 set_latency_range (p, false, lr);
827 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
828 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
831 lr.min = lr.max = _systemic_output_latency;
832 for (int i = 1; i <= a_out; ++i) {
834 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
835 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
837 set_latency_range (p, true, lr);
838 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
842 lr.min = lr.max = _systemic_input_latency;
843 for (int i = 0; i < m_ins; ++i) {
845 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
846 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
848 set_latency_range (p, false, lr);
849 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
850 if (_midi_mode == MidiGenerator) {
851 static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
855 lr.min = lr.max = _systemic_output_latency;
856 for (int i = 1; i <= m_out; ++i) {
858 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
859 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
861 set_latency_range (p, true, lr);
862 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
868 DummyAudioBackend::unregister_ports (bool system_only)
870 _system_inputs.clear();
871 _system_outputs.clear();
872 _system_midi_in.clear();
873 _system_midi_out.clear();
875 for (std::vector<DummyPort*>::iterator i = _ports.begin (); i != _ports.end ();) {
876 DummyPort* port = *i;
877 if (! system_only || (port->is_physical () && port->is_terminal ())) {
878 port->disconnect_all ();
880 i = _ports.erase (i);
888 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
890 DummyPort* src_port = find_port (src);
891 DummyPort* dst_port = find_port (dst);
894 PBD::error << _("DummyBackend::connect: Invalid Source port:")
895 << " (" << src <<")" << endmsg;
899 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
900 << " (" << dst <<")" << endmsg;
903 return src_port->connect (dst_port);
907 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
909 DummyPort* src_port = find_port (src);
910 DummyPort* dst_port = find_port (dst);
912 if (!src_port || !dst_port) {
913 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
916 return src_port->disconnect (dst_port);
920 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
922 DummyPort* dst_port = find_port (dst);
923 if (!valid_port (src)) {
924 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
928 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
929 << " (" << dst << ")" << endmsg;
932 return static_cast<DummyPort*>(src)->connect (dst_port);
936 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
938 DummyPort* dst_port = find_port (dst);
939 if (!valid_port (src) || !dst_port) {
940 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
943 return static_cast<DummyPort*>(src)->disconnect (dst_port);
947 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
949 if (!valid_port (port)) {
950 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
953 static_cast<DummyPort*>(port)->disconnect_all ();
958 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
960 if (!valid_port (port)) {
961 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
964 return static_cast<DummyPort*>(port)->is_connected ();
968 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
970 DummyPort* dst_port = find_port (dst);
971 if (!valid_port (src) || !dst_port) {
972 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
975 return static_cast<DummyPort*>(src)->is_connected (dst_port);
979 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
981 if (!valid_port (port)) {
982 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
985 return static_cast<DummyPort*>(port)->is_physically_connected ();
989 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
991 if (!valid_port (port)) {
992 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
996 assert (0 == names.size ());
998 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
1000 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1001 names.push_back ((*i)->name ());
1004 return (int)names.size ();
1009 DummyAudioBackend::midi_event_get (
1010 pframes_t& timestamp,
1011 size_t& size, uint8_t** buf, void* port_buffer,
1012 uint32_t event_index)
1014 assert (buf && port_buffer);
1015 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
1016 if (event_index >= source.size ()) {
1019 DummyMidiEvent * const event = source[event_index].get ();
1021 timestamp = event->timestamp ();
1022 size = event->size ();
1023 *buf = event->data ();
1028 DummyAudioBackend::midi_event_put (
1030 pframes_t timestamp,
1031 const uint8_t* buffer, size_t size)
1033 assert (buffer && port_buffer);
1034 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
1035 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1036 // nevermind, ::get_buffer() sorts events, but always print warning
1037 fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
1039 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
1044 DummyAudioBackend::get_midi_event_count (void* port_buffer)
1046 assert (port_buffer);
1047 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1051 DummyAudioBackend::midi_clear (void* port_buffer)
1053 assert (port_buffer);
1054 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1062 DummyAudioBackend::can_monitor_input () const
1068 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1074 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1080 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1085 /* Latency management */
1088 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1090 if (!valid_port (port)) {
1091 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1093 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1097 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1100 if (!valid_port (port)) {
1101 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1106 DummyPort *p = static_cast<DummyPort*>(port);
1109 r = p->latency_range (for_playback);
1110 if (p->is_physical() && p->is_terminal()) {
1111 if (p->is_input() && for_playback) {
1112 const size_t l_in = _samples_per_period * .25;
1116 if (p->is_output() && !for_playback) {
1117 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1118 const size_t l_in = _samples_per_period * .25;
1119 const size_t l_out = _samples_per_period - l_in;
1127 /* Discovering physical ports */
1130 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1132 if (!valid_port (port)) {
1133 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1136 return static_cast<DummyPort*>(port)->is_physical ();
1140 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1142 for (size_t i = 0; i < _ports.size (); ++i) {
1143 DummyPort* port = _ports[i];
1144 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1145 port_names.push_back (port->name ());
1151 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1153 for (size_t i = 0; i < _ports.size (); ++i) {
1154 DummyPort* port = _ports[i];
1155 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1156 port_names.push_back (port->name ());
1162 DummyAudioBackend::n_physical_outputs () const
1166 for (size_t i = 0; i < _ports.size (); ++i) {
1167 DummyPort* port = _ports[i];
1168 if (port->is_output () && port->is_physical ()) {
1169 switch (port->type ()) {
1170 case DataType::AUDIO: ++n_audio; break;
1171 case DataType::MIDI: ++n_midi; break;
1177 cc.set (DataType::AUDIO, n_audio);
1178 cc.set (DataType::MIDI, n_midi);
1183 DummyAudioBackend::n_physical_inputs () const
1187 for (size_t i = 0; i < _ports.size (); ++i) {
1188 DummyPort* port = _ports[i];
1189 if (port->is_input () && port->is_physical ()) {
1190 switch (port->type ()) {
1191 case DataType::AUDIO: ++n_audio; break;
1192 case DataType::MIDI: ++n_midi; break;
1198 cc.set (DataType::AUDIO, n_audio);
1199 cc.set (DataType::MIDI, n_midi);
1203 /* Getting access to the data buffer for a port */
1206 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1209 assert (valid_port (port));
1210 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1213 /* Engine Process */
1215 DummyAudioBackend::main_process_thread ()
1217 AudioEngine::thread_init_callback (this);
1219 _processed_samples = 0;
1221 manager.registration_callback();
1222 manager.graph_order_callback();
1224 int64_t clock1, clock2;
1228 if (_freewheeling != _freewheel) {
1229 _freewheel = _freewheeling;
1230 engine.freewheel_callback (_freewheel);
1233 // re-set input buffers, generate on demand.
1234 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1235 (*it)->next_period();
1237 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1238 (*it)->next_period();
1241 if (engine.process_callback (_samples_per_period)) {
1244 _processed_samples += _samples_per_period;
1246 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1248 int opc = _system_outputs.size();
1249 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1250 DummyAudioPort* op = _system_outputs[(opn % opc)];
1251 (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
1255 if (_midi_mode == MidiLoopback) {
1257 int opc = _system_midi_out.size();
1258 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1259 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1260 op->get_buffer(0); // mix-down
1261 (*it)->set_loopback (op->const_buffer());
1264 else if (_midi_mode == MidiToAudio) {
1266 int opc = _system_midi_out.size();
1267 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1268 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1269 op->get_buffer(0); // mix-down
1270 (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
1275 const int64_t nominal_time = 1e6 * _samples_per_period / _samplerate;
1276 clock2 = _x_get_monotonic_usec();
1277 bool timers_ok = true;
1279 /* querying the performance counter can fail occasionally (-1).
1280 * Also on some multi-core systems, timers are CPU specific and not
1281 * synchronized. We assume they differ more than a few milliseconds
1282 * (4 * nominal cycle time) and simply ignore cases where the
1283 * execution switches cores.
1285 if (clock1 < 0 || clock2 < 0 || (clock1 > clock2) || (clock2 - clock1) > 4 * nominal_time) {
1287 clock2 = nominal_time;
1291 const int64_t elapsed_time = clock2 - clock1;
1294 { // low pass filter
1295 const float load = elapsed_time / (float) nominal_time;
1296 if (load > _dsp_load) {
1299 const float a = .2 * _samples_per_period / _samplerate;
1300 _dsp_load = _dsp_load + a * (load - _dsp_load) + 1e-12;
1304 if (elapsed_time < nominal_time) {
1305 const int64_t sleepy = _speedup * (nominal_time - elapsed_time);
1306 Glib::usleep (std::max ((int64_t) 100, sleepy));
1308 Glib::usleep (100); // don't hog cpu
1312 Glib::usleep (100); // don't hog cpu
1315 /* beginning of next cycle */
1316 clock1 = _x_get_monotonic_usec();
1318 bool connections_changed = false;
1319 bool ports_changed = false;
1320 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1321 if (_port_change_flag) {
1322 ports_changed = true;
1323 _port_change_flag = false;
1325 if (!_port_connection_queue.empty ()) {
1326 connections_changed = true;
1328 while (!_port_connection_queue.empty ()) {
1329 PortConnectData *c = _port_connection_queue.back ();
1330 manager.connect_callback (c->a, c->b, c->c);
1331 _port_connection_queue.pop_back ();
1334 pthread_mutex_unlock (&_port_callback_mutex);
1336 if (ports_changed) {
1337 manager.registration_callback();
1339 if (connections_changed) {
1340 manager.graph_order_callback();
1342 if (connections_changed || ports_changed) {
1343 engine.latency_callback(false);
1344 engine.latency_callback(true);
1353 /******************************************************************************/
1355 static boost::shared_ptr<DummyAudioBackend> _instance;
1357 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1358 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1359 static int deinstantiate ();
1360 static bool already_configured ();
1361 static bool available ();
1363 static ARDOUR::AudioBackendInfo _descriptor = {
1372 static boost::shared_ptr<AudioBackend>
1373 backend_factory (AudioEngine& e)
1376 _instance.reset (new DummyAudioBackend (e, _descriptor));
1382 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1384 s_instance_name = arg1;
1385 #ifdef PLATFORM_WINDOWS
1386 LARGE_INTEGER Frequency;
1387 if (!QueryPerformanceFrequency(&Frequency) || Frequency.QuadPart < 1) {
1390 _win_pc_rate = 1000000.0 / Frequency.QuadPart;
1404 already_configured ()
1406 // special-case: unit-tests require backend to be pre-configured.
1407 if (s_instance_name == "Unit-Test") {
1419 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1421 return &_descriptor;
1425 /******************************************************************************/
1426 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1427 : _dummy_backend (b)
1431 , _gen_cycle (false)
1433 _capture_latency_range.min = 0;
1434 _capture_latency_range.max = 0;
1435 _playback_latency_range.min = 0;
1436 _playback_latency_range.max = 0;
1437 _dummy_backend.port_connect_add_remove_callback();
1440 DummyPort::~DummyPort () {
1442 _dummy_backend.port_connect_add_remove_callback();
1446 int DummyPort::connect (DummyPort *port)
1449 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1453 if (type () != port->type ()) {
1454 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1458 if (is_output () && port->is_output ()) {
1459 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1463 if (is_input () && port->is_input ()) {
1464 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1469 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1473 if (is_connected (port)) {
1474 #if 0 // don't bother to warn about this for now. just ignore it
1475 PBD::error << _("DummyPort::connect (): ports are already connected:")
1476 << " (" << name () << ") -> (" << port->name () << ")"
1482 _connect (port, true);
1487 void DummyPort::_connect (DummyPort *port, bool callback)
1489 _connections.push_back (port);
1491 port->_connect (this, false);
1492 _dummy_backend.port_connect_callback (name(), port->name(), true);
1496 int DummyPort::disconnect (DummyPort *port)
1499 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1503 if (!is_connected (port)) {
1504 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1505 << " (" << name () << ") -> (" << port->name () << ")"
1509 _disconnect (port, true);
1513 void DummyPort::_disconnect (DummyPort *port, bool callback)
1515 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1517 assert (it != _connections.end ());
1519 _connections.erase (it);
1522 port->_disconnect (this, false);
1523 _dummy_backend.port_connect_callback (name(), port->name(), false);
1528 void DummyPort::disconnect_all ()
1530 while (!_connections.empty ()) {
1531 _connections.back ()->_disconnect (this, false);
1532 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1533 _connections.pop_back ();
1538 DummyPort::is_connected (const DummyPort *port) const
1540 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1543 bool DummyPort::is_physically_connected () const
1545 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1546 if ((*it)->is_physical ()) {
1553 void DummyPort::setup_random_number_generator ()
1555 #ifdef PLATFORM_WINDOWS
1556 LARGE_INTEGER Count;
1557 if (QueryPerformanceCounter (&Count)) {
1558 _rseed = Count.QuadPart % UINT_MAX;
1562 _rseed = g_get_monotonic_time() % UINT_MAX;
1564 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1570 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1571 // http://www.firstpr.com.au/dsp/rand31/
1573 lo = 16807 * (_rseed & 0xffff);
1574 hi = 16807 * (_rseed >> 16);
1576 lo += (hi & 0x7fff) << 16;
1579 lo = (lo & 0x7fffffff) + (lo >> 31);
1581 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1583 return (_rseed = lo);
1589 return (randi() / 1073741824.f) - 1.f;
1592 /******************************************************************************/
1594 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1595 : DummyPort (b, name, flags)
1596 , _gen_type (Silence)
1612 memset (_buffer, 0, sizeof (_buffer));
1615 DummyAudioPort::~DummyAudioPort () {
1620 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1622 DummyPort::setup_random_number_generator();
1625 switch (_gen_type) {
1628 case UniformWhiteNoise:
1629 case GaussianWhiteNoise:
1633 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1636 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1639 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1640 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1641 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1642 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1646 case SquareSweepSwell:
1648 case SineSweepSwell:
1650 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1652 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1653 const double f_min = 20.;
1654 const double f_max = samplerate * .5;
1655 const double g_p2 = _gen_period * .5;
1657 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1658 const double a = f_min / samplerate;
1660 const double b = log (f_max / f_min) / g_p2;
1661 const double a = f_min / (b * samplerate);
1663 const uint32_t g_p2i = rint(g_p2);
1664 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1665 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1667 const double phase = i * (a + b * i);
1669 const double phase = a * exp (b * i) - a;
1671 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1673 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1674 const uint32_t j = _gen_period - i;
1676 const double phase = j * (a + b * j);
1678 const double phase = a * exp (b * j) - a;
1680 _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
1682 if (_gen_type == SquareSweep) {
1683 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1684 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1687 else if (_gen_type == SquareSweepSwell) {
1688 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1689 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1695 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1700 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1702 memset(_wavetable, 0, n_samples * sizeof(float));
1703 /* generate an audio spike for every midi message
1704 * to verify layency-compensation alignment
1705 * (here: midi-out playback-latency + audio-in capture-latency)
1707 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1708 const pframes_t t = (*it)->timestamp();
1709 assert(t < n_samples);
1710 // somewhat arbitrary mapping for quick visual feedback
1712 if ((*it)->size() == 3) {
1713 const unsigned char *d = (*it)->const_data();
1714 if ((d[0] & 0xf0) == 0x90) { // note on
1715 v = .25f + d[2] / 512.f;
1717 else if ((d[0] & 0xf0) == 0x80) { // note off
1718 v = .3f - d[2] / 640.f;
1720 else if ((d[0] & 0xf0) == 0xb0) { // CC
1721 v = -.1f - d[2] / 256.f;
1728 float DummyAudioPort::grandf ()
1730 // Gaussian White Noise
1731 // http://www.musicdsp.org/archive.php?classid=0#109
1742 r = x1 * x1 + x2 * x2;
1743 } while ((r >= 1.0f) || (r < 1e-22f));
1745 r = sqrtf (-2.f * logf (r) / r);
1752 void DummyAudioPort::generate (const pframes_t n_samples)
1754 Glib::Threads::Mutex::Lock lm (generator_lock);
1759 switch (_gen_type) {
1761 memset (_buffer, 0, n_samples * sizeof (Sample));
1764 assert(_gen_period > 0);
1765 for (pframes_t i = 0 ; i < n_samples; ++i) {
1766 if (_gen_offset < _gen_period * .5f) {
1767 _buffer[i] = .40709f; // -6dBFS
1769 _buffer[i] = -.40709f;
1771 _gen_offset = (_gen_offset + 1) % _gen_period;
1775 assert(_gen_period > 0);
1776 memset (_buffer, 0, n_samples * sizeof (Sample));
1777 for (pframes_t i = 0; i < n_samples; ++i) {
1778 if (_gen_offset == 0) {
1781 _gen_offset = (_gen_offset + 1) % _gen_period;
1784 case SineSweepSwell:
1785 case SquareSweepSwell:
1786 assert(_wavetable && _gen_period > 0);
1788 const float vols = 2.f / (float)_gen_perio2;
1789 for (pframes_t i = 0; i < n_samples; ++i) {
1790 const float g = fabsf (_gen_count2 * vols - 1.f);
1791 _buffer[i] = g * _wavetable[_gen_offset];
1792 _gen_offset = (_gen_offset + 1) % _gen_period;
1793 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1798 _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
1802 assert(_wavetable && _gen_period > 0);
1804 pframes_t written = 0;
1805 while (written < n_samples) {
1806 const uint32_t remain = n_samples - written;
1807 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
1808 memcpy((void*)&_buffer[written],
1809 (void*)&_wavetable[_gen_offset],
1810 to_copy * sizeof(Sample));
1812 _gen_offset = (_gen_offset + to_copy) % _gen_period;
1816 case UniformWhiteNoise:
1817 for (pframes_t i = 0 ; i < n_samples; ++i) {
1818 _buffer[i] = .158489f * randf();
1821 case GaussianWhiteNoise:
1822 for (pframes_t i = 0 ; i < n_samples; ++i) {
1823 _buffer[i] = .089125f * grandf();
1827 for (pframes_t i = 0 ; i < n_samples; ++i) {
1828 // Paul Kellet's refined method
1829 // http://www.musicdsp.org/files/pink.txt
1830 // NB. If 'white' consists of uniform random numbers,
1831 // the pink noise will have an almost gaussian distribution.
1832 const float white = .0498f * randf ();
1833 _b0 = .99886f * _b0 + white * .0555179f;
1834 _b1 = .99332f * _b1 + white * .0750759f;
1835 _b2 = .96900f * _b2 + white * .1538520f;
1836 _b3 = .86650f * _b3 + white * .3104856f;
1837 _b4 = .55000f * _b4 + white * .5329522f;
1838 _b5 = -.7616f * _b5 - white * .0168980f;
1839 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
1840 _b6 = white * 0.115926f;
1844 for (pframes_t i = 0 ; i < n_samples; ++i) {
1845 const float white = 0.0498f * randf ();
1846 // Paul Kellet's economy method
1847 // http://www.musicdsp.org/files/pink.txt
1848 _b0 = 0.99765f * _b0 + white * 0.0990460f;
1849 _b1 = 0.96300f * _b1 + white * 0.2965164f;
1850 _b2 = 0.57000f * _b2 + white * 1.0526913f;
1851 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
1858 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1861 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1862 if (it == get_connections ().end ()) {
1863 memset (_buffer, 0, n_samples * sizeof (Sample));
1865 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1866 assert (source && source->is_output ());
1867 if (source->is_physical() && source->is_terminal()) {
1868 source->get_buffer(n_samples); // generate signal.
1870 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1871 while (++it != get_connections ().end ()) {
1872 source = static_cast<DummyAudioPort*>(*it);
1873 assert (source && source->is_output ());
1874 Sample* dst = buffer ();
1875 if (source->is_physical() && source->is_terminal()) {
1876 source->get_buffer(n_samples); // generate signal.
1878 const Sample* src = source->const_buffer ();
1879 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1884 } else if (is_output () && is_physical () && is_terminal()) {
1886 generate(n_samples);
1893 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1894 : DummyPort (b, name, flags)
1896 , _midi_seq_time (0)
1903 DummyMidiPort::~DummyMidiPort () {
1908 struct MidiEventSorter {
1909 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1914 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
1917 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1918 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1922 void DummyMidiPort::setup_generator (int seq_id, const float sr)
1924 DummyPort::setup_random_number_generator();
1925 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
1926 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
1931 void DummyMidiPort::midi_generate (const pframes_t n_samples)
1933 Glib::Threads::Mutex::Lock lm (generator_lock);
1941 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
1942 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
1943 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1949 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
1950 if (ev_beat_time < 0) {
1953 if ((pframes_t) ev_beat_time >= n_samples) {
1956 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
1958 _midi_seq_dat[_midi_seq_pos].event,
1959 _midi_seq_dat[_midi_seq_pos].size
1963 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
1964 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
1968 _midi_seq_time += n_samples;
1972 void* DummyMidiPort::get_buffer (pframes_t n_samples)
1976 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1977 i != get_connections ().end ();
1979 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
1980 if (source->is_physical() && source->is_terminal()) {
1981 source->get_buffer(n_samples); // generate signal.
1983 const DummyMidiBuffer *src = source->const_buffer ();
1984 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1985 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1988 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1989 } else if (is_output () && is_physical () && is_terminal()) {
1991 midi_generate(n_samples);
1997 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1999 , _timestamp (timestamp)
2003 _data = (uint8_t*) malloc (size);
2004 memcpy (_data, data, size);
2008 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
2009 : _size (other.size ())
2010 , _timestamp (other.timestamp ())
2013 if (other.size () && other.const_data ()) {
2014 _data = (uint8_t*) malloc (other.size ());
2015 memcpy (_data, other.const_data (), other.size ());
2019 DummyMidiEvent::~DummyMidiEvent () {