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.erase (port->name());
806 DummyAudioBackend::register_system_ports()
809 enum DummyAudioPort::GeneratorType gt;
810 if (_device == _("Uniform White Noise")) {
811 gt = DummyAudioPort::UniformWhiteNoise;
812 } else if (_device == _("Gaussian White Noise")) {
813 gt = DummyAudioPort::GaussianWhiteNoise;
814 } else if (_device == _("Pink Noise")) {
815 gt = DummyAudioPort::PinkNoise;
816 } else if (_device == _("Pink Noise (low CPU)")) {
817 gt = DummyAudioPort::PonyNoise;
818 } else if (_device == _("Sine Wave")) {
819 gt = DummyAudioPort::SineWave;
820 } else if (_device == _("Square Wave")) {
821 gt = DummyAudioPort::SquareWave;
822 } else if (_device == _("Impulses")) {
823 gt = DummyAudioPort::KronekerDelta;
824 } else if (_device == _("Sine Sweep")) {
825 gt = DummyAudioPort::SineSweep;
826 } else if (_device == _("Sine Sweep Swell")) {
827 gt = DummyAudioPort::SineSweepSwell;
828 } else if (_device == _("Square Sweep")) {
829 gt = DummyAudioPort::SquareSweep;
830 } else if (_device == _("Square Sweep Swell")) {
831 gt = DummyAudioPort::SquareSweepSwell;
832 } else if (_device == _("Loopback")) {
833 gt = DummyAudioPort::Loopback;
835 gt = DummyAudioPort::Silence;
838 if (_midi_mode == MidiToAudio) {
839 gt = DummyAudioPort::Loopback;
842 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
843 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
844 const int m_ins = _n_midi_inputs == UINT_MAX ? 0 : _n_midi_inputs;
845 const int m_out = _n_midi_outputs == UINT_MAX ? a_ins : _n_midi_outputs;
849 lr.min = lr.max = _systemic_input_latency;
850 for (int i = 1; i <= a_ins; ++i) {
852 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
853 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
855 set_latency_range (p, false, lr);
856 _system_inputs.push_back (static_cast<DummyAudioPort*>(p));
857 static_cast<DummyAudioPort*>(p)->setup_generator (gt, _samplerate);
860 lr.min = lr.max = _systemic_output_latency;
861 for (int i = 1; i <= a_out; ++i) {
863 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
864 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
866 set_latency_range (p, true, lr);
867 _system_outputs.push_back (static_cast<DummyAudioPort*>(p));
871 lr.min = lr.max = _systemic_input_latency;
872 for (int i = 0; i < m_ins; ++i) {
874 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i+1);
875 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
877 set_latency_range (p, false, lr);
878 _system_midi_in.push_back (static_cast<DummyMidiPort*>(p));
879 if (_midi_mode == MidiGenerator) {
880 static_cast<DummyMidiPort*>(p)->setup_generator (i % NUM_MIDI_EVENT_GENERATORS, _samplerate);
881 static_cast<DummyMidiPort*>(p)->set_pretty_name (DummyMidiData::sequence_names[i % NUM_MIDI_EVENT_GENERATORS]);
885 lr.min = lr.max = _systemic_output_latency;
886 for (int i = 1; i <= m_out; ++i) {
888 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
889 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
891 set_latency_range (p, true, lr);
892 _system_midi_out.push_back (static_cast<DummyMidiPort*>(p));
894 if (_device == _("Loopback") && _midi_mode == MidiToAudio) {
895 std::stringstream ss;
897 for (int apc = 0; apc < (int)_system_inputs.size(); ++apc) {
898 if ((apc % m_out) + 1 == i) {
899 ss << " >" << (apc + 1);
902 static_cast<DummyMidiPort*>(p)->set_pretty_name (ss.str());
909 DummyAudioBackend::unregister_ports (bool system_only)
911 _system_inputs.clear();
912 _system_outputs.clear();
913 _system_midi_in.clear();
914 _system_midi_out.clear();
916 for (PortIndex::iterator i = _ports.begin (); i != _ports.end ();) {
917 PortIndex::iterator cur = i++;
918 DummyPort* port = *cur;
919 if (! system_only || (port->is_physical () && port->is_terminal ())) {
920 port->disconnect_all ();
921 _portmap.erase (port->name());
929 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
931 DummyPort* src_port = find_port (src);
932 DummyPort* dst_port = find_port (dst);
935 PBD::error << _("DummyBackend::connect: Invalid Source port:")
936 << " (" << src <<")" << endmsg;
940 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
941 << " (" << dst <<")" << endmsg;
944 return src_port->connect (dst_port);
948 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
950 DummyPort* src_port = find_port (src);
951 DummyPort* dst_port = find_port (dst);
953 if (!src_port || !dst_port) {
954 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
957 return src_port->disconnect (dst_port);
961 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
963 DummyPort* dst_port = find_port (dst);
964 if (!valid_port (src)) {
965 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
969 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
970 << " (" << dst << ")" << endmsg;
973 return static_cast<DummyPort*>(src)->connect (dst_port);
977 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
979 DummyPort* dst_port = find_port (dst);
980 if (!valid_port (src) || !dst_port) {
981 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
984 return static_cast<DummyPort*>(src)->disconnect (dst_port);
988 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
990 if (!valid_port (port)) {
991 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
994 static_cast<DummyPort*>(port)->disconnect_all ();
999 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1001 if (!valid_port (port)) {
1002 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
1005 return static_cast<DummyPort*>(port)->is_connected ();
1009 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1011 DummyPort* dst_port = find_port (dst);
1013 if (!valid_port (src) || !dst_port) {
1014 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
1018 return static_cast<DummyPort*>(src)->is_connected (dst_port);
1022 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1024 if (!valid_port (port)) {
1025 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
1028 return static_cast<DummyPort*>(port)->is_physically_connected ();
1032 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1034 if (!valid_port (port)) {
1035 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
1039 assert (0 == names.size ());
1041 const std::set<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
1043 for (std::set<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1044 names.push_back ((*i)->name ());
1047 return (int)names.size ();
1052 DummyAudioBackend::midi_event_get (
1053 pframes_t& timestamp,
1054 size_t& size, uint8_t** buf, void* port_buffer,
1055 uint32_t event_index)
1057 assert (buf && port_buffer);
1058 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
1059 if (event_index >= source.size ()) {
1062 DummyMidiEvent * const event = source[event_index].get ();
1064 timestamp = event->timestamp ();
1065 size = event->size ();
1066 *buf = event->data ();
1071 DummyAudioBackend::midi_event_put (
1073 pframes_t timestamp,
1074 const uint8_t* buffer, size_t size)
1076 assert (buffer && port_buffer);
1077 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
1078 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1079 // nevermind, ::get_buffer() sorts events, but always print warning
1080 fprintf (stderr, "DummyMidiBuffer: it's too late for this event %d > %d.\n", (pframes_t)dst.back ()->timestamp (), timestamp);
1082 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
1083 #if 0 // DEBUG MIDI EVENTS
1084 printf("DummyAudioBackend::midi_event_put %d, %zu: ", timestamp, size);
1085 for (size_t xx = 0; xx < size; ++xx) {
1086 printf(" %02x", buffer[xx]);
1094 DummyAudioBackend::get_midi_event_count (void* port_buffer)
1096 assert (port_buffer);
1097 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
1101 DummyAudioBackend::midi_clear (void* port_buffer)
1103 assert (port_buffer);
1104 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
1112 DummyAudioBackend::can_monitor_input () const
1118 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1124 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1130 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
1135 /* Latency management */
1138 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1140 if (!valid_port (port)) {
1141 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
1143 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
1147 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1150 if (!valid_port (port)) {
1151 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
1156 DummyPort *p = static_cast<DummyPort*>(port);
1159 r = p->latency_range (for_playback);
1160 if (p->is_physical() && p->is_terminal()) {
1161 if (p->is_input() && for_playback) {
1162 const size_t l_in = _samples_per_period * .25;
1166 if (p->is_output() && !for_playback) {
1167 /* with 'Loopback' there is exactly once cycle latency, divide it between In + Out; */
1168 const size_t l_in = _samples_per_period * .25;
1169 const size_t l_out = _samples_per_period - l_in;
1177 /* Discovering physical ports */
1180 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1182 if (!valid_port (port)) {
1183 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
1186 return static_cast<DummyPort*>(port)->is_physical ();
1190 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1192 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1193 DummyPort* port = *i;
1194 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1195 port_names.push_back (port->name ());
1201 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1203 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1204 DummyPort* port = *i;
1205 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1206 port_names.push_back (port->name ());
1212 DummyAudioBackend::n_physical_outputs () const
1216 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1217 DummyPort* port = *i;
1218 if (port->is_output () && port->is_physical ()) {
1219 switch (port->type ()) {
1220 case DataType::AUDIO: ++n_audio; break;
1221 case DataType::MIDI: ++n_midi; break;
1227 cc.set (DataType::AUDIO, n_audio);
1228 cc.set (DataType::MIDI, n_midi);
1233 DummyAudioBackend::n_physical_inputs () const
1237 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1238 DummyPort* port = *i;
1239 if (port->is_input () && port->is_physical ()) {
1240 switch (port->type ()) {
1241 case DataType::AUDIO: ++n_audio; break;
1242 case DataType::MIDI: ++n_midi; break;
1248 cc.set (DataType::AUDIO, n_audio);
1249 cc.set (DataType::MIDI, n_midi);
1253 /* Getting access to the data buffer for a port */
1256 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1259 assert (valid_port (port));
1260 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1263 /* Engine Process */
1265 DummyAudioBackend::main_process_thread ()
1267 AudioEngine::thread_init_callback (this);
1269 _processed_samples = 0;
1271 manager.registration_callback();
1272 manager.graph_order_callback();
1278 if (_freewheeling != _freewheel) {
1279 _freewheel = _freewheeling;
1280 engine.freewheel_callback (_freewheel);
1283 // re-set input buffers, generate on demand.
1284 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1285 (*it)->next_period();
1287 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1288 (*it)->next_period();
1291 if (engine.process_callback (_samples_per_period)) {
1294 _processed_samples += _samples_per_period;
1296 if (_device == _("Loopback") && _midi_mode != MidiToAudio) {
1298 int opc = _system_outputs.size();
1299 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1300 DummyAudioPort* op = _system_outputs[(opn % opc)];
1301 (*it)->fill_wavetable ((const float*)op->get_buffer (_samples_per_period), _samples_per_period);
1305 if (_midi_mode == MidiLoopback) {
1307 int opc = _system_midi_out.size();
1308 for (std::vector<DummyMidiPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++opn) {
1309 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1310 op->get_buffer(0); // mix-down
1311 (*it)->set_loopback (op->const_buffer());
1314 else if (_midi_mode == MidiToAudio) {
1316 int opc = _system_midi_out.size();
1317 for (std::vector<DummyAudioPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++opn) {
1318 DummyMidiPort* op = _system_midi_out[(opn % opc)];
1319 op->get_buffer(0); // mix-down
1320 (*it)->midi_to_wavetable (op->const_buffer(), _samples_per_period);
1325 _dsp_load_calc.set_start_timestamp_us (clock1);
1326 _dsp_load_calc.set_stop_timestamp_us (_x_get_monotonic_usec());
1327 _dsp_load = _dsp_load_calc.get_dsp_load_unbound ();
1329 const int64_t elapsed_time = _dsp_load_calc.elapsed_time_us ();
1330 const int64_t nominal_time = _dsp_load_calc.get_max_time_us ();
1331 if (elapsed_time < nominal_time) {
1332 const int64_t sleepy = _speedup * (nominal_time - elapsed_time);
1333 Glib::usleep (std::max ((int64_t) 100, sleepy));
1335 Glib::usleep (100); // don't hog cpu
1339 Glib::usleep (100); // don't hog cpu
1342 /* beginning of next cycle */
1343 clock1 = _x_get_monotonic_usec();
1345 bool connections_changed = false;
1346 bool ports_changed = false;
1347 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1348 if (_port_change_flag) {
1349 ports_changed = true;
1350 _port_change_flag = false;
1352 if (!_port_connection_queue.empty ()) {
1353 connections_changed = true;
1355 while (!_port_connection_queue.empty ()) {
1356 PortConnectData *c = _port_connection_queue.back ();
1357 manager.connect_callback (c->a, c->b, c->c);
1358 _port_connection_queue.pop_back ();
1361 pthread_mutex_unlock (&_port_callback_mutex);
1363 if (ports_changed) {
1364 manager.registration_callback();
1366 if (connections_changed) {
1367 manager.graph_order_callback();
1369 if (connections_changed || ports_changed) {
1370 engine.latency_callback(false);
1371 engine.latency_callback(true);
1380 /******************************************************************************/
1382 static boost::shared_ptr<DummyAudioBackend> _instance;
1384 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1385 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1386 static int deinstantiate ();
1387 static bool already_configured ();
1388 static bool available ();
1390 static ARDOUR::AudioBackendInfo _descriptor = {
1399 static boost::shared_ptr<AudioBackend>
1400 backend_factory (AudioEngine& e)
1403 _instance.reset (new DummyAudioBackend (e, _descriptor));
1409 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1411 s_instance_name = arg1;
1423 already_configured ()
1425 // special-case: unit-tests require backend to be pre-configured.
1426 if (s_instance_name == "Unit-Test") {
1438 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1440 return &_descriptor;
1444 /******************************************************************************/
1445 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1446 : _dummy_backend (b)
1450 , _gen_cycle (false)
1452 _capture_latency_range.min = 0;
1453 _capture_latency_range.max = 0;
1454 _playback_latency_range.min = 0;
1455 _playback_latency_range.max = 0;
1456 _dummy_backend.port_connect_add_remove_callback();
1459 DummyPort::~DummyPort () {
1461 _dummy_backend.port_connect_add_remove_callback();
1465 int DummyPort::connect (DummyPort *port)
1468 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1472 if (type () != port->type ()) {
1473 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1477 if (is_output () && port->is_output ()) {
1478 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1482 if (is_input () && port->is_input ()) {
1483 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1488 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1492 if (is_connected (port)) {
1493 #if 0 // don't bother to warn about this for now. just ignore it
1494 PBD::error << _("DummyPort::connect (): ports are already connected:")
1495 << " (" << name () << ") -> (" << port->name () << ")"
1501 _connect (port, true);
1506 void DummyPort::_connect (DummyPort *port, bool callback)
1508 _connections.insert (port);
1510 port->_connect (this, false);
1511 _dummy_backend.port_connect_callback (name(), port->name(), true);
1515 int DummyPort::disconnect (DummyPort *port)
1518 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1522 if (!is_connected (port)) {
1523 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1524 << " (" << name () << ") -> (" << port->name () << ")"
1528 _disconnect (port, true);
1532 void DummyPort::_disconnect (DummyPort *port, bool callback)
1534 std::set<DummyPort*>::iterator it = _connections.find (port);
1535 assert (it != _connections.end ());
1536 _connections.erase (it);
1538 port->_disconnect (this, false);
1539 _dummy_backend.port_connect_callback (name(), port->name(), false);
1544 void DummyPort::disconnect_all ()
1546 while (!_connections.empty ()) {
1547 std::set<DummyPort*>::iterator it = _connections.begin ();
1548 (*it)->_disconnect (this, false);
1549 _dummy_backend.port_connect_callback (name(), (*it)->name(), false);
1550 _connections.erase (it);
1555 DummyPort::is_connected (const DummyPort *port) const
1557 return _connections.find (const_cast<DummyPort *>(port)) != _connections.end ();
1560 bool DummyPort::is_physically_connected () const
1562 for (std::set<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1563 if ((*it)->is_physical ()) {
1570 void DummyPort::setup_random_number_generator ()
1572 #ifdef PLATFORM_WINDOWS
1573 LARGE_INTEGER Count;
1574 if (QueryPerformanceCounter (&Count)) {
1575 _rseed = Count.QuadPart % UINT_MAX;
1579 _rseed = g_get_monotonic_time() % UINT_MAX;
1581 _rseed = (_rseed + (uint64_t)this) % UINT_MAX;
1582 if (_rseed == 0) _rseed = 1;
1588 // 31bit Park-Miller-Carta Pseudo-Random Number Generator
1589 // http://www.firstpr.com.au/dsp/rand31/
1591 lo = 16807 * (_rseed & 0xffff);
1592 hi = 16807 * (_rseed >> 16);
1594 lo += (hi & 0x7fff) << 16;
1597 lo = (lo & 0x7fffffff) + (lo >> 31);
1599 if (lo > 0x7fffffff) { lo -= 0x7fffffff; }
1601 return (_rseed = lo);
1607 return (randi() / 1073741824.f) - 1.f;
1610 /******************************************************************************/
1612 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1613 : DummyPort (b, name, flags)
1614 , _gen_type (Silence)
1630 memset (_buffer, 0, sizeof (_buffer));
1633 DummyAudioPort::~DummyAudioPort () {
1638 void DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate)
1640 DummyPort::setup_random_number_generator();
1643 switch (_gen_type) {
1646 case UniformWhiteNoise:
1647 case GaussianWhiteNoise:
1651 _gen_period = (5 + randi() % (int)(samplerate / 20.f));
1654 _gen_period = (5 + randi() % (int)(samplerate / 20.f)) & ~1;
1657 _gen_period = 5 + randi() % (int)(samplerate / 20.f);
1658 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1659 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1660 _wavetable[i] = .12589f * sinf(2.0f * M_PI * (float)i / (float)_gen_period); // -18dBFS
1664 case SquareSweepSwell:
1666 case SineSweepSwell:
1668 _gen_period = 5 * samplerate + randi() % (int)(samplerate * 10.f);
1670 _gen_perio2 = 1 | (int)ceilf (_gen_period * .89f); // Volume Swell period
1671 const double f_min = 20.;
1672 const double f_max = samplerate * .5;
1673 const double g_p2 = _gen_period * .5;
1675 const double b = (f_max - f_min) / (2. * samplerate * g_p2);
1676 const double a = f_min / samplerate;
1678 const double b = log (f_max / f_min) / g_p2;
1679 const double a = f_min / (b * samplerate);
1681 const uint32_t g_p2i = rint(g_p2);
1682 _wavetable = (Sample*) malloc (_gen_period * sizeof(Sample));
1683 for (uint32_t i = 0 ; i < g_p2i; ++i) {
1685 const double phase = i * (a + b * i);
1687 const double phase = a * exp (b * i) - a;
1689 _wavetable[i] = (float)sin (2. * M_PI * (phase - floor (phase)));
1691 for (uint32_t i = g_p2i; i < _gen_period; ++i) {
1692 const uint32_t j = _gen_period - i;
1694 const double phase = j * (a + b * j);
1696 const double phase = a * exp (b * j) - a;
1698 _wavetable[i] = -(float)sin (2. * M_PI * (phase - floor (phase)));
1700 if (_gen_type == SquareSweep) {
1701 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1702 _wavetable[i] = _wavetable[i] < 0 ? -.40709f : .40709f;
1705 else if (_gen_type == SquareSweepSwell) {
1706 for (uint32_t i = 0 ; i < _gen_period; ++i) {
1707 _wavetable[i] = _wavetable[i] < 0 ? -1 : 1;
1713 _wavetable = (Sample*) malloc (DummyAudioBackend::max_buffer_size() * sizeof(Sample));
1718 void DummyAudioPort::midi_to_wavetable (DummyMidiBuffer const * const src, size_t n_samples)
1720 memset(_wavetable, 0, n_samples * sizeof(float));
1721 /* generate an audio spike for every midi message
1722 * to verify layency-compensation alignment
1723 * (here: midi-out playback-latency + audio-in capture-latency)
1725 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1726 const pframes_t t = (*it)->timestamp();
1727 assert(t < n_samples);
1728 // somewhat arbitrary mapping for quick visual feedback
1730 if ((*it)->size() == 3) {
1731 const unsigned char *d = (*it)->const_data();
1732 if ((d[0] & 0xf0) == 0x90) { // note on
1733 v = .25f + d[2] / 512.f;
1735 else if ((d[0] & 0xf0) == 0x80) { // note off
1736 v = .3f - d[2] / 640.f;
1738 else if ((d[0] & 0xf0) == 0xb0) { // CC
1739 v = -.1f - d[2] / 256.f;
1746 float DummyAudioPort::grandf ()
1748 // Gaussian White Noise
1749 // http://www.musicdsp.org/archive.php?classid=0#109
1760 r = x1 * x1 + x2 * x2;
1761 } while ((r >= 1.0f) || (r < 1e-22f));
1763 r = sqrtf (-2.f * logf (r) / r);
1770 void DummyAudioPort::generate (const pframes_t n_samples)
1772 Glib::Threads::Mutex::Lock lm (generator_lock);
1777 switch (_gen_type) {
1779 memset (_buffer, 0, n_samples * sizeof (Sample));
1782 assert(_gen_period > 0);
1783 for (pframes_t i = 0 ; i < n_samples; ++i) {
1784 if (_gen_offset < _gen_period * .5f) {
1785 _buffer[i] = .40709f; // -6dBFS
1787 _buffer[i] = -.40709f;
1789 _gen_offset = (_gen_offset + 1) % _gen_period;
1793 assert(_gen_period > 0);
1794 memset (_buffer, 0, n_samples * sizeof (Sample));
1795 for (pframes_t i = 0; i < n_samples; ++i) {
1796 if (_gen_offset == 0) {
1799 _gen_offset = (_gen_offset + 1) % _gen_period;
1802 case SineSweepSwell:
1803 case SquareSweepSwell:
1804 assert(_wavetable && _gen_period > 0);
1806 const float vols = 2.f / (float)_gen_perio2;
1807 for (pframes_t i = 0; i < n_samples; ++i) {
1808 const float g = fabsf (_gen_count2 * vols - 1.f);
1809 _buffer[i] = g * _wavetable[_gen_offset];
1810 _gen_offset = (_gen_offset + 1) % _gen_period;
1811 _gen_count2 = (_gen_count2 + 1) % _gen_perio2;
1816 _gen_period = n_samples; // XXX DummyBackend::_samples_per_period;
1820 assert(_wavetable && _gen_period > 0);
1822 pframes_t written = 0;
1823 while (written < n_samples) {
1824 const uint32_t remain = n_samples - written;
1825 const uint32_t to_copy = std::min(remain, _gen_period - _gen_offset);
1826 memcpy((void*)&_buffer[written],
1827 (void*)&_wavetable[_gen_offset],
1828 to_copy * sizeof(Sample));
1830 _gen_offset = (_gen_offset + to_copy) % _gen_period;
1834 case UniformWhiteNoise:
1835 for (pframes_t i = 0 ; i < n_samples; ++i) {
1836 _buffer[i] = .158489f * randf();
1839 case GaussianWhiteNoise:
1840 for (pframes_t i = 0 ; i < n_samples; ++i) {
1841 _buffer[i] = .089125f * grandf();
1845 for (pframes_t i = 0 ; i < n_samples; ++i) {
1846 // Paul Kellet's refined method
1847 // http://www.musicdsp.org/files/pink.txt
1848 // NB. If 'white' consists of uniform random numbers,
1849 // the pink noise will have an almost gaussian distribution.
1850 const float white = .0498f * randf ();
1851 _b0 = .99886f * _b0 + white * .0555179f;
1852 _b1 = .99332f * _b1 + white * .0750759f;
1853 _b2 = .96900f * _b2 + white * .1538520f;
1854 _b3 = .86650f * _b3 + white * .3104856f;
1855 _b4 = .55000f * _b4 + white * .5329522f;
1856 _b5 = -.7616f * _b5 - white * .0168980f;
1857 _buffer[i] = _b0 + _b1 + _b2 + _b3 + _b4 + _b5 + _b6 + white * 0.5362f;
1858 _b6 = white * 0.115926f;
1862 for (pframes_t i = 0 ; i < n_samples; ++i) {
1863 const float white = 0.0498f * randf ();
1864 // Paul Kellet's economy method
1865 // http://www.musicdsp.org/files/pink.txt
1866 _b0 = 0.99765f * _b0 + white * 0.0990460f;
1867 _b1 = 0.96300f * _b1 + white * 0.2965164f;
1868 _b2 = 0.57000f * _b2 + white * 1.0526913f;
1869 _buffer[i] = _b0 + _b1 + _b2 + white * 0.1848f;
1876 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1879 const std::set<DummyPort *>& connections = get_connections ();
1880 std::set<DummyPort*>::const_iterator it = connections.begin ();
1881 if (it == connections.end ()) {
1882 memset (_buffer, 0, n_samples * sizeof (Sample));
1884 DummyAudioPort * source = static_cast<DummyAudioPort*>(*it);
1885 assert (source && source->is_output ());
1886 if (source->is_physical() && source->is_terminal()) {
1887 source->get_buffer(n_samples); // generate signal.
1889 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1890 while (++it != connections.end ()) {
1891 source = static_cast<DummyAudioPort*>(*it);
1892 assert (source && source->is_output ());
1893 Sample* dst = buffer ();
1894 if (source->is_physical() && source->is_terminal()) {
1895 source->get_buffer(n_samples); // generate signal.
1897 const Sample* src = source->const_buffer ();
1898 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1903 } else if (is_output () && is_physical () && is_terminal()) {
1905 generate(n_samples);
1912 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1913 : DummyPort (b, name, flags)
1915 , _midi_seq_time (0)
1922 DummyMidiPort::~DummyMidiPort () {
1927 struct MidiEventSorter {
1928 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1933 void DummyMidiPort::set_loopback (DummyMidiBuffer const * const src)
1936 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1937 _loopback.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1941 void DummyMidiPort::setup_generator (int seq_id, const float sr)
1943 DummyPort::setup_random_number_generator();
1944 _midi_seq_dat = DummyMidiData::sequences[seq_id % NUM_MIDI_EVENT_GENERATORS];
1945 _midi_seq_spb = sr * .5f; // 120 BPM, beat_time 1.0 per beat.
1950 void DummyMidiPort::midi_generate (const pframes_t n_samples)
1952 Glib::Threads::Mutex::Lock lm (generator_lock);
1960 if (_midi_seq_spb == 0 || !_midi_seq_dat) {
1961 for (DummyMidiBuffer::const_iterator it = _loopback.begin (); it != _loopback.end (); ++it) {
1962 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1968 const int32_t ev_beat_time = _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb - _midi_seq_time;
1969 if (ev_beat_time < 0) {
1972 if ((pframes_t) ev_beat_time >= n_samples) {
1975 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (
1977 _midi_seq_dat[_midi_seq_pos].event,
1978 _midi_seq_dat[_midi_seq_pos].size
1982 if (_midi_seq_dat[_midi_seq_pos].event[0] == 0xff && _midi_seq_dat[_midi_seq_pos].event[1] == 0xff) {
1983 _midi_seq_time -= _midi_seq_dat[_midi_seq_pos].beat_time * _midi_seq_spb;
1987 _midi_seq_time += n_samples;
1991 void* DummyMidiPort::get_buffer (pframes_t n_samples)
1995 const std::set<DummyPort*>& connections = get_connections ();
1996 for (std::set<DummyPort*>::const_iterator i = connections.begin ();
1997 i != connections.end ();
1999 DummyMidiPort * source = static_cast<DummyMidiPort*>(*i);
2000 if (source->is_physical() && source->is_terminal()) {
2001 source->get_buffer(n_samples); // generate signal.
2003 const DummyMidiBuffer *src = source->const_buffer ();
2004 for (DummyMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2005 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
2008 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
2009 } else if (is_output () && is_physical () && is_terminal()) {
2011 midi_generate(n_samples);
2017 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2019 , _timestamp (timestamp)
2023 _data = (uint8_t*) malloc (size);
2024 memcpy (_data, data, size);
2028 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
2029 : _size (other.size ())
2030 , _timestamp (other.timestamp ())
2033 if (other.size () && other.const_data ()) {
2034 _data = (uint8_t*) malloc (other.size ());
2035 memcpy (_data, other.const_data (), other.size ());
2039 DummyMidiEvent::~DummyMidiEvent () {