2 * Copyright (C) 2014 Robin Gareus <robin@gareus.org>
3 * Copyright (C) 2013 Paul Davis
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #ifdef PLATFORM_WINDOWS
28 #include <pbd/windows_timer_utils.h>
31 #include "dummy_audiobackend.h"
32 #include "dummy_midi_seq.h"
34 #include "pbd/error.h"
35 #include "ardour/port_manager.h"
38 using namespace ARDOUR;
40 static std::string s_instance_name;
41 size_t DummyAudioBackend::_max_buffer_size = 8192;
42 std::vector<std::string> DummyAudioBackend::_midi_options;
43 std::vector<AudioBackend::DeviceStatus> DummyAudioBackend::_device_status;
45 std::vector<DummyAudioBackend::DriverSpeed> DummyAudioBackend::_driver_speed;
47 static int64_t _x_get_monotonic_usec() {
48 #ifdef PLATFORM_WINDOWS
49 return PBD::get_microseconds();
51 return g_get_monotonic_time();
54 DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
55 : AudioBackend (e, info)
58 , _freewheeling (false)
62 , _samples_per_period (1024)
68 , _midi_mode (MidiNoEvents)
69 , _systemic_input_latency (0)
70 , _systemic_output_latency (0)
71 , _processed_samples (0)
72 , _port_change_flag (false)
74 _instance_name = s_instance_name;
75 _device = _("Silence");
76 pthread_mutex_init (&_port_callback_mutex, 0);
78 if (_driver_speed.empty()) {
79 _driver_speed.push_back (DriverSpeed (_("Half Speed"), 2.0f));
80 _driver_speed.push_back (DriverSpeed (_("Normal Speed"), 1.0f));
81 _driver_speed.push_back (DriverSpeed (_("Double Speed"), 0.5f));
82 _driver_speed.push_back (DriverSpeed (_("5x Speed"), 0.2f));
83 _driver_speed.push_back (DriverSpeed (_("10x Speed"), 0.1f));
84 _driver_speed.push_back (DriverSpeed (_("15x Speed"), 0.06666f));
85 _driver_speed.push_back (DriverSpeed (_("20x Speed"), 0.05f));
86 _driver_speed.push_back (DriverSpeed (_("50x Speed"), 0.02f));
91 DummyAudioBackend::~DummyAudioBackend ()
93 pthread_mutex_destroy (&_port_callback_mutex);
96 /* AUDIOBACKEND API */
99 DummyAudioBackend::name () const
101 return X_("Dummy"); // internal name
105 DummyAudioBackend::is_realtime () const
110 std::vector<AudioBackend::DeviceStatus>
111 DummyAudioBackend::enumerate_devices () const
113 if (_device_status.empty()) {
114 _device_status.push_back (DeviceStatus (_("Silence"), true));
115 _device_status.push_back (DeviceStatus (_("Sine Wave"), true));
116 _device_status.push_back (DeviceStatus (_("Square Wave"), true));
117 _device_status.push_back (DeviceStatus (_("Impulses"), true));
118 _device_status.push_back (DeviceStatus (_("Uniform White Noise"), true));
119 _device_status.push_back (DeviceStatus (_("Gaussian White Noise"), true));
120 _device_status.push_back (DeviceStatus (_("Pink Noise"), true));
121 _device_status.push_back (DeviceStatus (_("Pink Noise (low CPU)"), true));
122 _device_status.push_back (DeviceStatus (_("Sine Sweep"), true));
123 _device_status.push_back (DeviceStatus (_("Sine Sweep Swell"), true));
124 _device_status.push_back (DeviceStatus (_("Square Sweep"), true));
125 _device_status.push_back (DeviceStatus (_("Square Sweep Swell"), true));
126 _device_status.push_back (DeviceStatus (_("Loopback"), true));
128 return _device_status;
132 DummyAudioBackend::available_sample_rates (const std::string&) const
134 std::vector<float> sr;
135 sr.push_back (8000.0);
136 sr.push_back (22050.0);
137 sr.push_back (24000.0);
138 sr.push_back (44100.0);
139 sr.push_back (48000.0);
140 sr.push_back (88200.0);
141 sr.push_back (96000.0);
142 sr.push_back (176400.0);
143 sr.push_back (192000.0);
147 std::vector<uint32_t>
148 DummyAudioBackend::available_buffer_sizes (const std::string&) const
150 std::vector<uint32_t> bs;
167 DummyAudioBackend::available_input_channel_count (const std::string&) const
173 DummyAudioBackend::available_output_channel_count (const std::string&) const
179 DummyAudioBackend::can_change_sample_rate_when_running () const
185 DummyAudioBackend::can_change_buffer_size_when_running () const
190 std::vector<std::string>
191 DummyAudioBackend::enumerate_drivers () const
193 std::vector<std::string> speed_drivers;
194 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
195 speed_drivers.push_back (it->name);
197 return speed_drivers;
201 DummyAudioBackend::driver_name () const
203 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
204 if (rintf (1e6f * _speedup) == rintf (1e6f * it->speedup)) {
209 return _("Normal Speed");
213 DummyAudioBackend::set_driver (const std::string& d)
215 for (std::vector<DriverSpeed>::const_iterator it = _driver_speed.begin () ; it != _driver_speed.end (); ++it) {
217 _speedup = it->speedup;
226 DummyAudioBackend::set_device_name (const std::string& d)
233 DummyAudioBackend::set_sample_rate (float sr)
235 if (sr <= 0) { return -1; }
237 engine.sample_rate_change (sr);
242 DummyAudioBackend::set_buffer_size (uint32_t bs)
244 if (bs <= 0 || bs > _max_buffer_size) {
247 _samples_per_period = bs;
249 /* update port latencies
250 * with 'Loopback' there is exactly once cycle latency,
251 * divide it between In + Out;
254 lr.min = lr.max = _systemic_input_latency;
255 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
256 set_latency_range (*it, false, lr);
258 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
259 set_latency_range (*it, false, lr);
262 lr.min = lr.max = _systemic_output_latency;
263 for (std::vector<DummyAudioPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
264 set_latency_range (*it, true, lr);
266 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
267 set_latency_range (*it, true, lr);
270 engine.buffer_size_change (bs);
275 DummyAudioBackend::set_interleaved (bool yn)
277 if (!yn) { return 0; }
282 DummyAudioBackend::set_input_channels (uint32_t cc)
289 DummyAudioBackend::set_output_channels (uint32_t cc)
296 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
298 _systemic_input_latency = sl;
303 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
305 _systemic_output_latency = sl;
309 /* Retrieving parameters */
311 DummyAudioBackend::device_name () const
317 DummyAudioBackend::sample_rate () const
323 DummyAudioBackend::buffer_size () const
325 return _samples_per_period;
329 DummyAudioBackend::interleaved () const
335 DummyAudioBackend::input_channels () const
341 DummyAudioBackend::output_channels () const
347 DummyAudioBackend::systemic_input_latency () const
349 return _systemic_input_latency;
353 DummyAudioBackend::systemic_output_latency () const
355 return _systemic_output_latency;
360 std::vector<std::string>
361 DummyAudioBackend::enumerate_midi_options () const
363 if (_midi_options.empty()) {
364 _midi_options.push_back (_("1 in, 1 out, Silence"));
365 _midi_options.push_back (_("2 in, 2 out, Silence"));
366 _midi_options.push_back (_("8 in, 8 out, Silence"));
367 _midi_options.push_back (_("Midi Event Generators"));
368 _midi_options.push_back (_("8 in, 8 out, Loopback"));
369 _midi_options.push_back (_("MIDI to Audio, Loopback"));
370 _midi_options.push_back (_("No MIDI I/O"));
372 return _midi_options;
376 DummyAudioBackend::set_midi_option (const std::string& opt)
378 _midi_mode = MidiNoEvents;
379 if (opt == _("1 in, 1 out, Silence")) {
380 _n_midi_inputs = _n_midi_outputs = 1;
382 else if (opt == _("2 in, 2 out, Silence")) {
383 _n_midi_inputs = _n_midi_outputs = 2;
385 else if (opt == _("8 in, 8 out, Silence")) {
386 _n_midi_inputs = _n_midi_outputs = 8;
388 else if (opt == _("Midi Event Generators")) {
389 _n_midi_inputs = _n_midi_outputs = NUM_MIDI_EVENT_GENERATORS;
390 _midi_mode = MidiGenerator;
392 else if (opt == _("8 in, 8 out, Loopback")) {
393 _n_midi_inputs = _n_midi_outputs = 8;
394 _midi_mode = MidiLoopback;
396 else if (opt == _("MIDI to Audio, Loopback")) {
397 _n_midi_inputs = _n_midi_outputs = UINT32_MAX;
398 _midi_mode = MidiToAudio;
401 _n_midi_inputs = _n_midi_outputs = 0;
407 DummyAudioBackend::midi_option () const
414 static void * pthread_process (void *arg)
416 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
417 d->main_process_thread ();
423 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
426 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
427 return BackendReinitializationError;
430 if (_ports.size () || _portmap.size ()) {
431 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
432 for (PortIndex::const_iterator it = _ports.begin (); it != _ports.end (); ++it) {
433 PBD::info << _("DummyAudioBackend: port '") << (*it)->name () << "' exists." << endmsg;
435 _system_inputs.clear();
436 _system_outputs.clear();
437 _system_midi_in.clear();
438 _system_midi_out.clear();
443 if (register_system_ports()) {
444 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
445 return PortRegistrationError;
448 engine.sample_rate_change (_samplerate);
449 engine.buffer_size_change (_samples_per_period);
451 _dsp_load_calc.set_max_time (_samplerate, _samples_per_period);
453 if (engine.reestablish_ports ()) {
454 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
456 return PortReconnectError;
459 engine.reconnect_ports ();
460 _port_change_flag = false;
462 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
463 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
467 while (!_running && --timeout > 0) { Glib::usleep (1000); }
469 if (timeout == 0 || !_running) {
470 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
471 return ProcessThreadStartError;
478 DummyAudioBackend::stop ()
486 if (pthread_join (_main_thread, &status)) {
487 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
495 DummyAudioBackend::freewheel (bool onoff)
497 _freewheeling = onoff;
502 DummyAudioBackend::dsp_load () const
504 return 100.f * _dsp_load;
508 DummyAudioBackend::raw_buffer_size (DataType t)
511 case DataType::AUDIO:
512 return _samples_per_period * sizeof(Sample);
514 return _max_buffer_size; // XXX not really limited
521 DummyAudioBackend::sample_time ()
523 return _processed_samples;
527 DummyAudioBackend::sample_time_at_cycle_start ()
529 return _processed_samples;
533 DummyAudioBackend::samples_since_cycle_start ()
540 DummyAudioBackend::dummy_process_thread (void *arg)
542 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
543 boost::function<void ()> f = td->f;
550 DummyAudioBackend::create_process_thread (boost::function<void()> func)
554 size_t stacksize = 100000;
556 pthread_attr_init (&attr);
557 pthread_attr_setstacksize (&attr, stacksize);
558 ThreadData* td = new ThreadData (this, func, stacksize);
560 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
561 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
562 pthread_attr_destroy (&attr);
565 pthread_attr_destroy (&attr);
567 _threads.push_back (thread_id);
572 DummyAudioBackend::join_process_threads ()
576 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
579 if (pthread_join (*i, &status)) {
580 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
589 DummyAudioBackend::in_process_thread ()
591 if (pthread_equal (_main_thread, pthread_self()) != 0) {
595 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
597 if (pthread_equal (*i, pthread_self ()) != 0) {
605 DummyAudioBackend::process_thread_count ()
607 return _threads.size ();
611 DummyAudioBackend::update_latencies ()
613 // trigger latency callback in RT thread (locked graph)
614 port_connect_add_remove_callback();
620 DummyAudioBackend::private_handle () const
626 DummyAudioBackend::my_name () const
628 return _instance_name;
632 DummyAudioBackend::available () const
638 DummyAudioBackend::port_name_size () const
644 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
646 if (!valid_port (port)) {
647 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
650 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
654 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
656 if (!valid_port (port)) {
657 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
658 return std::string ();
660 return static_cast<DummyPort*>(port)->name ();
664 DummyAudioBackend::get_port_property (PortHandle port, const std::string& key, std::string& value, std::string& type) const
666 if (!valid_port (port)) {
667 PBD::warning << _("DummyBackend::get_port_property: Invalid Port(s)") << endmsg;
670 if (key == "http://jackaudio.org/metadata/pretty-name") {
672 value = static_cast<DummyPort*>(port)->pretty_name ();
673 if (!value.empty()) {
681 DummyAudioBackend::set_port_property (PortHandle port, const std::string& key, const std::string& value, const std::string& type)
683 if (!valid_port (port)) {
684 PBD::warning << _("DummyBackend::set_port_property: Invalid Port(s)") << endmsg;
687 if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
688 static_cast<DummyPort*>(port)->set_pretty_name (value);
694 PortEngine::PortHandle
695 DummyAudioBackend::get_port_by_name (const std::string& name) const
697 PortHandle port = (PortHandle) find_port (name);
702 DummyAudioBackend::get_ports (
703 const std::string& port_name_pattern,
704 DataType type, PortFlags flags,
705 std::vector<std::string>& port_names) const
709 bool use_regexp = false;
710 if (port_name_pattern.size () > 0) {
711 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
716 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
717 DummyPort* port = *i;
718 if ((port->type () == type) && flags == (port->flags () & flags)) {
719 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
720 port_names.push_back (port->name ());
726 regfree (&port_regex);
732 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
734 if (!valid_port (port)) {
735 return DataType::NIL;
737 return static_cast<DummyPort*>(port)->type ();
740 PortEngine::PortHandle
741 DummyAudioBackend::register_port (
742 const std::string& name,
743 ARDOUR::DataType type,
744 ARDOUR::PortFlags flags)
746 if (name.size () == 0) { return 0; }
747 if (flags & IsPhysical) { return 0; }
749 PBD::info << _("DummyBackend::register_port: Engine is not running.") << endmsg;
751 return add_port (_instance_name + ":" + name, type, flags);
754 PortEngine::PortHandle
755 DummyAudioBackend::add_port (
756 const std::string& name,
757 ARDOUR::DataType type,
758 ARDOUR::PortFlags flags)
760 assert(name.size ());
761 if (find_port (name)) {
762 PBD::error << _("DummyBackend::register_port: Port already exists:")
763 << " (" << name << ")" << endmsg;
766 DummyPort* port = NULL;
768 case DataType::AUDIO:
769 port = new DummyAudioPort (*this, name, flags);
772 port = new DummyMidiPort (*this, name, flags);
775 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
779 _ports.insert (port);
780 _portmap.insert (make_pair (name, port));
786 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
789 PBD::info << _("DummyBackend::unregister_port: Engine is not running.") << endmsg;
790 assert (!valid_port (port_handle));
793 DummyPort* port = static_cast<DummyPort*>(port_handle);
794 PortIndex::iterator i = _ports.find (static_cast<DummyPort*>(port_handle));
795 if (i == _ports.end ()) {
796 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
799 disconnect_all(port_handle);
800 PortMap::const_iterator it = _portmap.find ((*i)->name());
801 if (it != _portmap.end()) {
809 DummyAudioBackend::register_system_ports()
812 enum DummyAudioPort::GeneratorType gt;
813 if (_device == _("Uniform White Noise")) {
814 gt = DummyAudioPort::UniformWhiteNoise;
815 } else if (_device == _("Gaussian White Noise")) {
816 gt = DummyAudioPort::GaussianWhiteNoise;
817 } else if (_device == _("Pink Noise")) {
818 gt = DummyAudioPort::PinkNoise;
819 } else if (_device == _("Pink Noise (low CPU)")) {
820 gt = DummyAudioPort::PonyNoise;
821 } else if (_device == _("Sine Wave")) {
822 gt = DummyAudioPort::SineWave;
823 } else if (_device == _("Square Wave")) {
824 gt = DummyAudioPort::SquareWave;
825 } else if (_device == _("Impulses")) {
826 gt = DummyAudioPort::KronekerDelta;
827 } else if (_device == _("Sine Sweep")) {
828 gt = DummyAudioPort::SineSweep;
829 } else if (_device == _("Sine Sweep Swell")) {
830 gt = DummyAudioPort::SineSweepSwell;
831 } else if (_device == _("Square Sweep")) {
832 gt = DummyAudioPort::SquareSweep;
833 } else if (_device == _("Square Sweep Swell")) {
834 gt = DummyAudioPort::SquareSweepSwell;
835 } else if (_device == _("Loopback")) {
836 gt = DummyAudioPort::Loopback;
838 gt = DummyAudioPort::Silence;
841 if (_midi_mode == MidiToAudio) {
842 gt = DummyAudioPort::Loopback;
845 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
846 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
847 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
848 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
852 lr.min = lr.max = _systemic_input_latency;
853 for (int i = 1; i <= a_ins; ++i) {
855 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
856 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
858 set_latency_range (p, false, lr);
859 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
860 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
863 lr.min = lr.max = _systemic_output_latency;
864 for (int i = 1; i <= a_out; ++i) {
866 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
867 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
869 set_latency_range (p, true, lr);
870 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
874 lr.min = lr.max = _systemic_input_latency;
875 for (int i = 0; i < m_ins; ++i) {
877 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
878 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
880 set_latency_range (p, false, lr);
881 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
882 if (_midi_mode == MidiGenerator) {
883 static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
884 static_cast<DummyMidiPort*>(p)->set_pretty_name (DummyMidiData::sequence_names[i % NUM_MIDI_EVENT_GENERATORS]);
888 lr.min = lr.max = _systemic_output_latency;
889 for (int i = 1; i <= m_out; ++i) {
891 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
892 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
894 set_latency_range (p, true, lr);
895 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
897 if (_device == _("Loopback") && _midi_mode == MidiToAudio) {
898 std::stringstream ss;
900 for (int apc = 0; apc < (int)_system_inputs.size(); ++apc) {
901 if ((apc % m_out) + 1 == i) {
902 ss << " >" << (apc + 1);
905 static_cast<DummyMidiPort*>(p)->set_pretty_name (ss.str());
912 DummyAudioBackend::unregister_ports (bool system_only)
914 _system_inputs.clear();
915 _system_outputs.clear();
916 _system_midi_in.clear();
917 _system_midi_out.clear();
919 for (PortIndex::iterator i = _ports.begin (); i != _ports.end ();) {
920 PortIndex::iterator cur = i++;
921 DummyPort* port = *cur;
922 if (! system_only || (port->is_physical () && port->is_terminal ())) {
923 port->disconnect_all ();
924 PortMap::const_iterator it = _portmap.find (port->name());
925 if (it != _portmap.end()) {
935 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
937 DummyPort* src_port = find_port (src);
938 DummyPort* dst_port = find_port (dst);
941 PBD::error << _("DummyBackend::connect: Invalid Source port:")
942 << " (" << src <<")" << endmsg;
946 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
947 << " (" << dst <<")" << endmsg;
950 return src_port->connect (dst_port);
954 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
956 DummyPort* src_port = find_port (src);
957 DummyPort* dst_port = find_port (dst);
959 if (!src_port || !dst_port) {
960 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
963 return src_port->disconnect (dst_port);
967 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
969 DummyPort* dst_port = find_port (dst);
970 if (!valid_port (src)) {
971 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
975 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
976 << " (" << dst << ")" << endmsg;
979 return static_cast<DummyPort*>(src)->connect (dst_port);
983 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
985 DummyPort* dst_port = find_port (dst);
986 if (!valid_port (src) || !dst_port) {
987 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
990 return static_cast<DummyPort*>(src)->disconnect (dst_port);
994 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
996 if (!valid_port (port)) {
997 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1000 static_cast<DummyPort*>(port)->disconnect_all ();
1005 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1007 if (!valid_port (port)) {
1008 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1011 return static_cast<DummyPort*>(port)->is_connected ();
1015 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1017 DummyPort* dst_port = find_port (dst);
1019 if (!valid_port (src) || !dst_port) {
1020 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
1024 return static_cast<DummyPort*>(src)->is_connected (dst_port);
1028 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1030 if (!valid_port (port)) {
1031 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
1034 return static_cast<DummyPort*>(port)->is_physically_connected ();
1038 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1040 if (!valid_port (port)) {
1041 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
1045 assert (0 == names.size ());
1047 const std::set<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
1049 for (std::set<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1050 names.push_back ((*i)->name ());
1053 return (int)names.size ();
1058 DummyAudioBackend::midi_event_get (
1059 pframes_t& timestamp,
1060 size_t& size, uint8_t** buf, void* port_buffer,
1061 uint32_t event_index)
1063 assert (buf && port_buffer);
1064 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
1065 if (event_index >= source.size ()) {
1068 DummyMidiEvent * const event = source[event_index].get ();
1070 timestamp = event->timestamp ();
1071 size = event->size ();
1072 *buf = event->data ();
1077 DummyAudioBackend::midi_event_put (
1079 pframes_t timestamp,
1080 const uint8_t* buffer, size_t size)
1082 assert (buffer && port_buffer);
1083 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
1084 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1085 // nevermind, ::get_buffer() sorts events, but always print warning
1086 fprintf (stderr, "DummyMidiBuffer: it's too late for this event %d > %d.\n", (pframes_t)dst.back ()->timestamp (), timestamp);
1088 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
1089 #if 0 // DEBUG MIDI EVENTS
1090 printf("DummyAudioBackend::midi_event_put %d, %zu: ", timestamp, size);
1091 for (size_t xx = 0; xx < size; ++xx) {
1092 printf(" %02x", buffer[xx]);
1100 DummyAudioBackend::get_midi_event_count (void* port_buffer)
1102 assert (port_buffer);
1103 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1107 DummyAudioBackend::midi_clear (void* port_buffer)
1109 assert (port_buffer);
1110 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1118 DummyAudioBackend::can_monitor_input () const
1124 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1130 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1136 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1141 /* Latency management */
1144 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1146 if (!valid_port (port)) {
1147 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1149 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1153 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1156 if (!valid_port (port)) {
1157 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1162 DummyPort *p = static_cast<DummyPort*>(port);
1165 r = p->latency_range (for_playback);
1166 if (p->is_physical() && p->is_terminal()) {
1167 if (p->is_input() && for_playback) {
1168 const size_t l_in = _samples_per_period * .25;
1172 if (p->is_output() && !for_playback) {
1173 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1174 const size_t l_in = _samples_per_period * .25;
1175 const size_t l_out = _samples_per_period - l_in;
1183 /* Discovering physical ports */
1186 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1188 if (!valid_port (port)) {
1189 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1192 return static_cast<DummyPort*>(port)->is_physical ();
1196 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1198 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1199 DummyPort* port = *i;
1200 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1201 port_names.push_back (port->name ());
1207 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1209 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1210 DummyPort* port = *i;
1211 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1212 port_names.push_back (port->name ());
1218 DummyAudioBackend::n_physical_outputs () const
1222 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1223 DummyPort* port = *i;
1224 if (port->is_output () && port->is_physical ()) {
1225 switch (port->type ()) {
1226 case DataType::AUDIO: ++n_audio; break;
1227 case DataType::MIDI: ++n_midi; break;
1233 cc.set (DataType::AUDIO, n_audio);
1234 cc.set (DataType::MIDI, n_midi);
1239 DummyAudioBackend::n_physical_inputs () const
1243 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1244 DummyPort* port = *i;
1245 if (port->is_input () && port->is_physical ()) {
1246 switch (port->type ()) {
1247 case DataType::AUDIO: ++n_audio; break;
1248 case DataType::MIDI: ++n_midi; break;
1254 cc.set (DataType::AUDIO, n_audio);
1255 cc.set (DataType::MIDI, n_midi);
1259 /* Getting access to the data buffer for a port */
1262 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1265 assert (valid_port (port));
1266 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1269 /* Engine Process */
1271 DummyAudioBackend::main_process_thread ()
1273 AudioEngine::thread_init_callback (this);
1275 _processed_samples = 0;
1277 manager.registration_callback();
1278 manager.graph_order_callback();
1284 if (_freewheeling != _freewheel) {
1285 _freewheel = _freewheeling;
1286 engine.freewheel_callback (_freewheel);
1289 // re-set input buffers, generate on demand.
1290 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1291 (*it)->next_period();
1293 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1294 (*it)->next_period();
1297 if (engine.process_callback (_samples_per_period)) {
1300 _processed_samples += _samples_per_period;
1302 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1304 int opc = _system_outputs.size();
1305 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1306 DummyAudioPort* op = _system_outputs[(opn % opc)];
1307 (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
1311 if (_midi_mode == MidiLoopback) {
1313 int opc = _system_midi_out.size();
1314 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1315 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1316 op->get_buffer(0); // mix-down
1317 (*it)->set_loopback (op->const_buffer());
1320 else if (_midi_mode == MidiToAudio) {
1322 int opc = _system_midi_out.size();
1323 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1324 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1325 op->get_buffer(0); // mix-down
1326 (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
1331 _dsp_load_calc.set_start_timestamp_us (clock1);
1332 _dsp_load_calc.set_stop_timestamp_us (_x_get_monotonic_usec());
1333 _dsp_load = _dsp_load_calc.get_dsp_load_unbound ();
1335 const int64_t elapsed_time = _dsp_load_calc.elapsed_time_us ();
1336 const int64_t nominal_time = _dsp_load_calc.get_max_time_us ();
1337 if (elapsed_time < nominal_time) {
1338 const int64_t sleepy = _speedup * (nominal_time - elapsed_time);
1339 Glib::usleep (std::max ((int64_t) 100, sleepy));
1341 Glib::usleep (100); // don't hog cpu
1345 Glib::usleep (100); // don't hog cpu
1348 /* beginning of next cycle */
1349 clock1 = _x_get_monotonic_usec();
1351 bool connections_changed = false;
1352 bool ports_changed = false;
1353 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1354 if (_port_change_flag) {
1355 ports_changed = true;
1356 _port_change_flag = false;
1358 if (!_port_connection_queue.empty ()) {
1359 connections_changed = true;
1361 while (!_port_connection_queue.empty ()) {
1362 PortConnectData *c = _port_connection_queue.back ();
1363 manager.connect_callback (c->a, c->b, c->c);
1364 _port_connection_queue.pop_back ();
1367 pthread_mutex_unlock (&_port_callback_mutex);
1369 if (ports_changed) {
1370 manager.registration_callback();
1372 if (connections_changed) {
1373 manager.graph_order_callback();
1375 if (connections_changed || ports_changed) {
1376 engine.latency_callback(false);
1377 engine.latency_callback(true);
1386 /******************************************************************************/
1388 static boost::shared_ptr<DummyAudioBackend> _instance;
1390 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1391 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1392 static int deinstantiate ();
1393 static bool already_configured ();
1394 static bool available ();
1396 static ARDOUR::AudioBackendInfo _descriptor = {
1405 static boost::shared_ptr<AudioBackend>
1406 backend_factory (AudioEngine& e)
1409 _instance.reset (new DummyAudioBackend (e, _descriptor));
1415 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1417 s_instance_name = arg1;
1429 already_configured ()
1431 // special-case: unit-tests require backend to be pre-configured.
1432 if (s_instance_name == "Unit-Test") {
1444 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1446 return &_descriptor;
1450 /******************************************************************************/
1451 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1452 : _dummy_backend (b)
1456 , _gen_cycle (false)
1458 _capture_latency_range.min = 0;
1459 _capture_latency_range.max = 0;
1460 _playback_latency_range.min = 0;
1461 _playback_latency_range.max = 0;
1462 _dummy_backend.port_connect_add_remove_callback();
1465 DummyPort::~DummyPort () {
1467 _dummy_backend.port_connect_add_remove_callback();
1471 int DummyPort::connect (DummyPort *port)
1474 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1478 if (type () != port->type ()) {
1479 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1483 if (is_output () && port->is_output ()) {
1484 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1488 if (is_input () && port->is_input ()) {
1489 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1494 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1498 if (is_connected (port)) {
1499 #if 0 // don't bother to warn about this for now. just ignore it
1500 PBD::error << _("DummyPort::connect (): ports are already connected:")
1501 << " (" << name () << ") -> (" << port->name () << ")"
1507 _connect (port, true);
1512 void DummyPort::_connect (DummyPort *port, bool callback)
1514 _connections.insert (port);
1516 port->_connect (this, false);
1517 _dummy_backend.port_connect_callback (name(), port->name(), true);
1521 int DummyPort::disconnect (DummyPort *port)
1524 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1528 if (!is_connected (port)) {
1529 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1530 << " (" << name () << ") -> (" << port->name () << ")"
1534 _disconnect (port, true);
1538 void DummyPort::_disconnect (DummyPort *port, bool callback)
1540 std::set<DummyPort*>::iterator it = _connections.find (port);
1541 assert (it != _connections.end ());
1542 _connections.erase (it);
1544 port->_disconnect (this, false);
1545 _dummy_backend.port_connect_callback (name(), port->name(), false);
1550 void DummyPort::disconnect_all ()
1552 while (!_connections.empty ()) {
1553 std::set<DummyPort*>::iterator it = _connections.begin ();
1554 (*it)->_disconnect (this, false);
1555 _dummy_backend.port_connect_callback (name(), (*it)->name(), false);
1556 _connections.erase (it);
1561 DummyPort::is_connected (const DummyPort *port) const
1563 return _connections.find (const_cast<DummyPort *>(port)) != _connections.end ();
1566 bool DummyPort::is_physically_connected () const
1568 for (std::set<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1569 if ((*it)->is_physical ()) {
1576 void DummyPort::setup_random_number_generator ()
1578 #ifdef PLATFORM_WINDOWS
1579 LARGE_INTEGER Count;
1580 if (QueryPerformanceCounter (&Count)) {
1581 _rseed = Count.QuadPart % UINT_MAX;
1585 _rseed = g_get_monotonic_time() % UINT_MAX;
1587 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1588 if (_rseed == 0) _rseed = 1;
1594 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1595 // http://www.firstpr.com.au/dsp/rand31/
1597 lo = 16807 * (_rseed & 0xffff);
1598 hi = 16807 * (_rseed >> 16);
1600 lo += (hi & 0x7fff) << 16;
1603 lo = (lo & 0x7fffffff) + (lo >> 31);
1605 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1607 return (_rseed = lo);
1613 return (randi() / 1073741824.f) - 1.f;
1616 /******************************************************************************/
1618 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1619 : DummyPort (b, name, flags)
1620 , _gen_type (Silence)
1636 memset (_buffer, 0, sizeof (_buffer));
1639 DummyAudioPort::~DummyAudioPort () {
1644 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1646 DummyPort::setup_random_number_generator();
1649 switch (_gen_type) {
1652 case UniformWhiteNoise:
1653 case GaussianWhiteNoise:
1657 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1660 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1663 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1664 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1665 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1666 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1670 case SquareSweepSwell:
1672 case SineSweepSwell:
1674 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1676 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1677 const double f_min = 20.;
1678 const double f_max = samplerate * .5;
1679 const double g_p2 = _gen_period * .5;
1681 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1682 const double a = f_min / samplerate;
1684 const double b = log (f_max / f_min) / g_p2;
1685 const double a = f_min / (b * samplerate);
1687 const uint32_t g_p2i = rint(g_p2);
1688 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1689 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1691 const double phase = i * (a + b * i);
1693 const double phase = a * exp (b * i) - a;
1695 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1697 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1698 const uint32_t j = _gen_period - i;
1700 const double phase = j * (a + b * j);
1702 const double phase = a * exp (b * j) - a;
1704 _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
1706 if (_gen_type == SquareSweep) {
1707 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1708 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1711 else if (_gen_type == SquareSweepSwell) {
1712 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1713 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1719 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1724 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1726 memset(_wavetable, 0, n_samples * sizeof(float));
1727 /* generate an audio spike for every midi message
1728 * to verify layency-compensation alignment
1729 * (here: midi-out playback-latency + audio-in capture-latency)
1731 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1732 const pframes_t t = (*it)->timestamp();
1733 assert(t < n_samples);
1734 // somewhat arbitrary mapping for quick visual feedback
1736 if ((*it)->size() == 3) {
1737 const unsigned char *d = (*it)->const_data();
1738 if ((d[0] & 0xf0) == 0x90) { // note on
1739 v = .25f + d[2] / 512.f;
1741 else if ((d[0] & 0xf0) == 0x80) { // note off
1742 v = .3f - d[2] / 640.f;
1744 else if ((d[0] & 0xf0) == 0xb0) { // CC
1745 v = -.1f - d[2] / 256.f;
1752 float DummyAudioPort::grandf ()
1754 // Gaussian White Noise
1755 // http://www.musicdsp.org/archive.php?classid=0#109
1766 r = x1 * x1 + x2 * x2;
1767 } while ((r >= 1.0f) || (r < 1e-22f));
1769 r = sqrtf (-2.f * logf (r) / r);
1776 void DummyAudioPort::generate (const pframes_t n_samples)
1778 Glib::Threads::Mutex::Lock lm (generator_lock);
1783 switch (_gen_type) {
1785 memset (_buffer, 0, n_samples * sizeof (Sample));
1788 assert(_gen_period > 0);
1789 for (pframes_t i = 0 ; i < n_samples; ++i) {
1790 if (_gen_offset < _gen_period * .5f) {
1791 _buffer[i] = .40709f; // -6dBFS
1793 _buffer[i] = -.40709f;
1795 _gen_offset = (_gen_offset + 1) % _gen_period;
1799 assert(_gen_period > 0);
1800 memset (_buffer, 0, n_samples * sizeof (Sample));
1801 for (pframes_t i = 0; i < n_samples; ++i) {
1802 if (_gen_offset == 0) {
1805 _gen_offset = (_gen_offset + 1) % _gen_period;
1808 case SineSweepSwell:
1809 case SquareSweepSwell:
1810 assert(_wavetable && _gen_period > 0);
1812 const float vols = 2.f / (float)_gen_perio2;
1813 for (pframes_t i = 0; i < n_samples; ++i) {
1814 const float g = fabsf (_gen_count2 * vols - 1.f);
1815 _buffer[i] = g * _wavetable[_gen_offset];
1816 _gen_offset = (_gen_offset + 1) % _gen_period;
1817 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1822 _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
1826 assert(_wavetable && _gen_period > 0);
1828 pframes_t written = 0;
1829 while (written < n_samples) {
1830 const uint32_t remain = n_samples - written;
1831 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
1832 memcpy((void*)&_buffer[written],
1833 (void*)&_wavetable[_gen_offset],
1834 to_copy * sizeof(Sample));
1836 _gen_offset = (_gen_offset + to_copy) % _gen_period;
1840 case UniformWhiteNoise:
1841 for (pframes_t i = 0 ; i < n_samples; ++i) {
1842 _buffer[i] = .158489f * randf();
1845 case GaussianWhiteNoise:
1846 for (pframes_t i = 0 ; i < n_samples; ++i) {
1847 _buffer[i] = .089125f * grandf();
1851 for (pframes_t i = 0 ; i < n_samples; ++i) {
1852 // Paul Kellet's refined method
1853 // http://www.musicdsp.org/files/pink.txt
1854 // NB. If 'white' consists of uniform random numbers,
1855 // the pink noise will have an almost gaussian distribution.
1856 const float white = .0498f * randf ();
1857 _b0 = .99886f * _b0 + white * .0555179f;
1858 _b1 = .99332f * _b1 + white * .0750759f;
1859 _b2 = .96900f * _b2 + white * .1538520f;
1860 _b3 = .86650f * _b3 + white * .3104856f;
1861 _b4 = .55000f * _b4 + white * .5329522f;
1862 _b5 = -.7616f * _b5 - white * .0168980f;
1863 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
1864 _b6 = white * 0.115926f;
1868 for (pframes_t i = 0 ; i < n_samples; ++i) {
1869 const float white = 0.0498f * randf ();
1870 // Paul Kellet's economy method
1871 // http://www.musicdsp.org/files/pink.txt
1872 _b0 = 0.99765f * _b0 + white * 0.0990460f;
1873 _b1 = 0.96300f * _b1 + white * 0.2965164f;
1874 _b2 = 0.57000f * _b2 + white * 1.0526913f;
1875 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
1882 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1885 const std::set<DummyPort *>& connections = get_connections ();
1886 std::set<DummyPort*>::const_iterator it = connections.begin ();
1887 if (it == connections.end ()) {
1888 memset (_buffer, 0, n_samples * sizeof (Sample));
1890 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1891 assert (source && source->is_output ());
1892 if (source->is_physical() && source->is_terminal()) {
1893 source->get_buffer(n_samples); // generate signal.
1895 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1896 while (++it != connections.end ()) {
1897 source = static_cast<DummyAudioPort*>(*it);
1898 assert (source && source->is_output ());
1899 Sample* dst = buffer ();
1900 if (source->is_physical() && source->is_terminal()) {
1901 source->get_buffer(n_samples); // generate signal.
1903 const Sample* src = source->const_buffer ();
1904 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1909 } else if (is_output () && is_physical () && is_terminal()) {
1911 generate(n_samples);
1918 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1919 : DummyPort (b, name, flags)
1921 , _midi_seq_time (0)
1928 DummyMidiPort::~DummyMidiPort () {
1933 struct MidiEventSorter {
1934 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1939 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
1942 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1943 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1947 void DummyMidiPort::setup_generator (int seq_id, const float sr)
1949 DummyPort::setup_random_number_generator();
1950 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
1951 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
1956 void DummyMidiPort::midi_generate (const pframes_t n_samples)
1958 Glib::Threads::Mutex::Lock lm (generator_lock);
1966 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
1967 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
1968 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1974 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
1975 if (ev_beat_time < 0) {
1978 if ((pframes_t) ev_beat_time >= n_samples) {
1981 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
1983 _midi_seq_dat[_midi_seq_pos].event,
1984 _midi_seq_dat[_midi_seq_pos].size
1988 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
1989 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
1993 _midi_seq_time += n_samples;
1997 void* DummyMidiPort::get_buffer (pframes_t n_samples)
2001 const std::set<DummyPort*>& connections = get_connections ();
2002 for (std::set<DummyPort*>::const_iterator i = connections.begin ();
2003 i != connections.end ();
2005 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
2006 if (source->is_physical() && source->is_terminal()) {
2007 source->get_buffer(n_samples); // generate signal.
2009 const DummyMidiBuffer *src = source->const_buffer ();
2010 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2011 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2014 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
2015 } else if (is_output () && is_physical () && is_terminal()) {
2017 midi_generate(n_samples);
2023 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2025 , _timestamp (timestamp)
2029 _data = (uint8_t*) malloc (size);
2030 memcpy (_data, data, size);
2034 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
2035 : _size (other.size ())
2036 , _timestamp (other.timestamp ())
2039 if (other.size () && other.const_data ()) {
2040 _data = (uint8_t*) malloc (other.size ());
2041 memcpy (_data, other.const_data (), other.size ());
2045 DummyMidiEvent::~DummyMidiEvent () {