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.
25 #include "dummy_audiobackend.h"
27 #include "pbd/error.h"
28 #include "ardour/port_manager.h"
31 using namespace ARDOUR;
33 static std::string s_instance_name;
34 size_t DummyAudioBackend::_max_buffer_size = 8192;
36 DummyAudioBackend::DummyAudioBackend (AudioEngine& e, AudioBackendInfo& info)
37 : AudioBackend (e, info)
39 , _freewheeling (false)
41 , _samples_per_period (1024)
47 , _systemic_input_latency (0)
48 , _systemic_output_latency (0)
49 , _processed_samples (0)
50 , _port_change_flag (false)
52 _instance_name = s_instance_name;
53 pthread_mutex_init (&_port_callback_mutex, 0);
56 DummyAudioBackend::~DummyAudioBackend ()
58 pthread_mutex_destroy (&_port_callback_mutex);
61 /* AUDIOBACKEND API */
64 DummyAudioBackend::name () const
70 DummyAudioBackend::is_realtime () const
75 std::vector<AudioBackend::DeviceStatus>
76 DummyAudioBackend::enumerate_devices () const
78 std::vector<AudioBackend::DeviceStatus> s;
79 s.push_back (DeviceStatus (_("Dummy"), true));
84 DummyAudioBackend::available_sample_rates (const std::string&) const
86 std::vector<float> sr;
87 sr.push_back (8000.0);
88 sr.push_back (22050.0);
89 sr.push_back (24000.0);
90 sr.push_back (44100.0);
91 sr.push_back (48000.0);
92 sr.push_back (88200.0);
93 sr.push_back (96000.0);
94 sr.push_back (176400.0);
95 sr.push_back (192000.0);
100 DummyAudioBackend::available_buffer_sizes (const std::string&) const
102 std::vector<uint32_t> bs;
119 DummyAudioBackend::available_input_channel_count (const std::string&) const
125 DummyAudioBackend::available_output_channel_count (const std::string&) const
131 DummyAudioBackend::can_change_sample_rate_when_running () const
137 DummyAudioBackend::can_change_buffer_size_when_running () const
143 DummyAudioBackend::set_device_name (const std::string&)
149 DummyAudioBackend::set_sample_rate (float sr)
151 if (sr <= 0) { return -1; }
153 engine.sample_rate_change (sr);
158 DummyAudioBackend::set_buffer_size (uint32_t bs)
160 if (bs <= 0 || bs >= _max_buffer_size) {
163 _samples_per_period = bs;
164 engine.buffer_size_change (bs);
169 DummyAudioBackend::set_interleaved (bool yn)
171 if (!yn) { return 0; }
176 DummyAudioBackend::set_input_channels (uint32_t cc)
183 DummyAudioBackend::set_output_channels (uint32_t cc)
190 DummyAudioBackend::set_systemic_input_latency (uint32_t sl)
192 _systemic_input_latency = sl;
197 DummyAudioBackend::set_systemic_output_latency (uint32_t sl)
199 _systemic_output_latency = sl;
203 /* Retrieving parameters */
205 DummyAudioBackend::device_name () const
207 return _("Dummy Device");
211 DummyAudioBackend::sample_rate () const
217 DummyAudioBackend::buffer_size () const
219 return _samples_per_period;
223 DummyAudioBackend::interleaved () const
229 DummyAudioBackend::input_channels () const
235 DummyAudioBackend::output_channels () const
241 DummyAudioBackend::systemic_input_latency () const
243 return _systemic_input_latency;
247 DummyAudioBackend::systemic_output_latency () const
249 return _systemic_output_latency;
253 std::vector<std::string>
254 DummyAudioBackend::enumerate_midi_options () const
256 std::vector<std::string> m;
257 m.push_back (_("1 in, 1 out"));
258 m.push_back (_("2 in, 2 out"));
259 m.push_back (_("8 in, 8 out"));
264 DummyAudioBackend::set_midi_option (const std::string& opt)
266 if (opt == _("1 in, 1 out")) {
267 _n_midi_inputs = _n_midi_outputs = 1;
269 else if (opt == _("2 in, 2 out")) {
270 _n_midi_inputs = _n_midi_outputs = 2;
272 else if (opt == _("8 in, 8 out")) {
273 _n_midi_inputs = _n_midi_outputs = 8;
276 _n_midi_inputs = _n_midi_outputs = 0;
282 DummyAudioBackend::midi_option () const
289 static void * pthread_process (void *arg)
291 DummyAudioBackend *d = static_cast<DummyAudioBackend *>(arg);
292 d->main_process_thread ();
298 DummyAudioBackend::_start (bool /*for_latency_measurement*/)
301 PBD::error << _("DummyAudioBackend: already active.") << endmsg;
306 PBD::warning << _("DummyAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
310 if (register_system_ports()) {
311 PBD::error << _("DummyAudioBackend: failed to register system ports.") << endmsg;
315 engine.sample_rate_change (_samplerate);
316 engine.buffer_size_change (_samples_per_period);
318 if (engine.reestablish_ports ()) {
319 PBD::error << _("DummyAudioBackend: Could not re-establish ports.") << endmsg;
324 engine.reconnect_ports ();
325 _port_change_flag = false;
327 if (pthread_create (&_main_thread, NULL, pthread_process, this)) {
328 PBD::error << _("DummyAudioBackend: cannot start.") << endmsg;
332 while (!_running && --timeout > 0) { Glib::usleep (1000); }
334 if (timeout == 0 || !_running) {
335 PBD::error << _("DummyAudioBackend: failed to start process thread.") << endmsg;
343 DummyAudioBackend::stop ()
351 if (pthread_join (_main_thread, &status)) {
352 PBD::error << _("DummyAudioBackend: failed to terminate.") << endmsg;
355 unregister_system_ports();
360 DummyAudioBackend::freewheel (bool onoff)
362 if (onoff == _freewheeling) {
365 _freewheeling = onoff;
366 engine.freewheel_callback (onoff);
371 DummyAudioBackend::dsp_load () const
373 return 100.f * _dsp_load;
377 DummyAudioBackend::raw_buffer_size (DataType t)
380 case DataType::AUDIO:
381 return _samples_per_period * sizeof(Sample);
383 return _max_buffer_size; // XXX not really limited
390 DummyAudioBackend::sample_time ()
392 return _processed_samples;
396 DummyAudioBackend::sample_time_at_cycle_start ()
398 return _processed_samples;
402 DummyAudioBackend::samples_since_cycle_start ()
409 DummyAudioBackend::dummy_process_thread (void *arg)
411 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
412 boost::function<void ()> f = td->f;
419 DummyAudioBackend::create_process_thread (boost::function<void()> func)
423 size_t stacksize = 100000;
425 pthread_attr_init (&attr);
426 pthread_attr_setstacksize (&attr, stacksize);
427 ThreadData* td = new ThreadData (this, func, stacksize);
429 if (pthread_create (&thread_id, &attr, dummy_process_thread, td)) {
430 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
431 pthread_attr_destroy (&attr);
434 pthread_attr_destroy (&attr);
436 _threads.push_back (thread_id);
441 DummyAudioBackend::join_process_threads ()
445 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
448 if (pthread_join (*i, &status)) {
449 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
458 DummyAudioBackend::in_process_thread ()
460 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
462 if (pthread_equal (*i, pthread_self ()) != 0) {
470 DummyAudioBackend::process_thread_count ()
472 return _threads.size ();
476 DummyAudioBackend::update_latencies ()
478 // trigger latency callback in RT thread (locked graph)
479 port_connect_add_remove_callback();
485 DummyAudioBackend::private_handle () const
491 DummyAudioBackend::my_name () const
493 return _instance_name;
497 DummyAudioBackend::available () const
503 DummyAudioBackend::port_name_size () const
509 DummyAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
511 if (!valid_port (port)) {
512 PBD::error << _("DummyBackend::set_port_name: Invalid Port(s)") << endmsg;
515 return static_cast<DummyPort*>(port)->set_name (_instance_name + ":" + name);
519 DummyAudioBackend::get_port_name (PortEngine::PortHandle port) const
521 if (!valid_port (port)) {
522 PBD::error << _("DummyBackend::get_port_name: Invalid Port(s)") << endmsg;
523 return std::string ();
525 return static_cast<DummyPort*>(port)->name ();
528 PortEngine::PortHandle
529 DummyAudioBackend::get_port_by_name (const std::string& name) const
531 PortHandle port = (PortHandle) find_port (name);
536 DummyAudioBackend::get_ports (
537 const std::string& port_name_pattern,
538 DataType type, PortFlags flags,
539 std::vector<std::string>& port_names) const
543 bool use_regexp = false;
544 if (port_name_pattern.size () > 0) {
545 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
549 for (size_t i = 0; i < _ports.size (); ++i) {
550 DummyPort* port = _ports[i];
551 if ((port->type () == type) && (port->flags () & flags)) {
552 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
553 port_names.push_back (port->name ());
559 regfree (&port_regex);
565 DummyAudioBackend::port_data_type (PortEngine::PortHandle port) const
567 if (!valid_port (port)) {
568 return DataType::NIL;
570 return static_cast<DummyPort*>(port)->type ();
573 PortEngine::PortHandle
574 DummyAudioBackend::register_port (
575 const std::string& name,
576 ARDOUR::DataType type,
577 ARDOUR::PortFlags flags)
579 if (name.size () == 0) { return 0; }
580 if (flags & IsPhysical) { return 0; }
581 return add_port (_instance_name + ":" + name, type, flags);
584 PortEngine::PortHandle
585 DummyAudioBackend::add_port (
586 const std::string& name,
587 ARDOUR::DataType type,
588 ARDOUR::PortFlags flags)
590 assert(name.size ());
591 if (find_port (name)) {
592 PBD::error << _("DummyBackend::register_port: Port already exists:")
593 << " (" << name << ")" << endmsg;
596 DummyPort* port = NULL;
598 case DataType::AUDIO:
599 port = new DummyAudioPort (*this, name, flags);
602 port = new DummyMidiPort (*this, name, flags);
605 PBD::error << _("DummyBackend::register_port: Invalid Data Type.") << endmsg;
609 _ports.push_back (port);
615 DummyAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
617 if (!valid_port (port_handle)) {
618 PBD::error << _("DummyBackend::unregister_port: Invalid Port.") << endmsg;
620 DummyPort* port = static_cast<DummyPort*>(port_handle);
621 std::vector<DummyPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<DummyPort*>(port_handle));
622 if (i == _ports.end ()) {
623 PBD::error << _("DummyBackend::unregister_port: Failed to find port") << endmsg;
626 disconnect_all(port_handle);
632 DummyAudioBackend::register_system_ports()
636 const int a_ins = _n_inputs > 0 ? _n_inputs : 8;
637 const int a_out = _n_outputs > 0 ? _n_outputs : 8;
638 const int m_ins = _n_midi_inputs > 0 ? _n_midi_inputs : 2;
639 const int m_out = _n_midi_outputs > 0 ? _n_midi_outputs : 2;
642 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
643 for (int i = 1; i <= a_ins; ++i) {
645 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
646 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
648 set_latency_range (p, false, lr);
651 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
652 for (int i = 1; i <= a_out; ++i) {
654 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
655 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
657 set_latency_range (p, true, lr);
661 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
662 for (int i = 1; i <= m_ins; ++i) {
664 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
665 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
667 set_latency_range (p, false, lr);
670 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
671 for (int i = 1; i <= m_out; ++i) {
673 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
674 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
676 set_latency_range (p, true, lr);
682 DummyAudioBackend::unregister_system_ports()
685 while (i < _ports.size ()) {
686 DummyPort* port = _ports[i];
687 if (port->is_physical () && port->is_terminal ()) {
688 port->disconnect_all ();
689 _ports.erase (_ports.begin() + i);
697 DummyAudioBackend::connect (const std::string& src, const std::string& dst)
699 DummyPort* src_port = find_port (src);
700 DummyPort* dst_port = find_port (dst);
703 PBD::error << _("DummyBackend::connect: Invalid Source port:")
704 << " (" << src <<")" << endmsg;
708 PBD::error << _("DummyBackend::connect: Invalid Destination port:")
709 << " (" << dst <<")" << endmsg;
712 return src_port->connect (dst_port);
716 DummyAudioBackend::disconnect (const std::string& src, const std::string& dst)
718 DummyPort* src_port = find_port (src);
719 DummyPort* dst_port = find_port (dst);
721 if (!src_port || !dst_port) {
722 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
725 return src_port->disconnect (dst_port);
729 DummyAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
731 DummyPort* dst_port = find_port (dst);
732 if (!valid_port (src)) {
733 PBD::error << _("DummyBackend::connect: Invalid Source Port Handle") << endmsg;
737 PBD::error << _("DummyBackend::connect: Invalid Destination Port")
738 << " (" << dst << ")" << endmsg;
741 return static_cast<DummyPort*>(src)->connect (dst_port);
745 DummyAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
747 DummyPort* dst_port = find_port (dst);
748 if (!valid_port (src) || !dst_port) {
749 PBD::error << _("DummyBackend::disconnect: Invalid Port(s)") << endmsg;
752 return static_cast<DummyPort*>(src)->disconnect (dst_port);
756 DummyAudioBackend::disconnect_all (PortEngine::PortHandle port)
758 if (!valid_port (port)) {
759 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
762 static_cast<DummyPort*>(port)->disconnect_all ();
767 DummyAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
769 if (!valid_port (port)) {
770 PBD::error << _("DummyBackend::disconnect_all: Invalid Port") << endmsg;
773 return static_cast<DummyPort*>(port)->is_connected ();
777 DummyAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
779 DummyPort* dst_port = find_port (dst);
780 if (!valid_port (src) || !dst_port) {
781 PBD::error << _("DummyBackend::connected_to: Invalid Port") << endmsg;
784 return static_cast<DummyPort*>(src)->is_connected (dst_port);
788 DummyAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
790 if (!valid_port (port)) {
791 PBD::error << _("DummyBackend::physically_connected: Invalid Port") << endmsg;
794 return static_cast<DummyPort*>(port)->is_physically_connected ();
798 DummyAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
800 if (!valid_port (port)) {
801 PBD::error << _("DummyBackend::get_connections: Invalid Port") << endmsg;
805 assert (0 == names.size ());
807 const std::vector<DummyPort*>& connected_ports = static_cast<DummyPort*>(port)->get_connections ();
809 for (std::vector<DummyPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
810 names.push_back ((*i)->name ());
813 return (int)names.size ();
818 DummyAudioBackend::midi_event_get (
819 pframes_t& timestamp,
820 size_t& size, uint8_t** buf, void* port_buffer,
821 uint32_t event_index)
823 assert (buf && port_buffer);
824 DummyMidiBuffer& source = * static_cast<DummyMidiBuffer*>(port_buffer);
825 if (event_index >= source.size ()) {
828 DummyMidiEvent * const event = source[event_index].get ();
830 timestamp = event->timestamp ();
831 size = event->size ();
832 *buf = event->data ();
837 DummyAudioBackend::midi_event_put (
840 const uint8_t* buffer, size_t size)
842 assert (buffer && port_buffer);
843 DummyMidiBuffer& dst = * static_cast<DummyMidiBuffer*>(port_buffer);
844 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
845 fprintf (stderr, "DummyMidiBuffer: it's too late for this event.\n");
848 dst.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (timestamp, buffer, size)));
853 DummyAudioBackend::get_midi_event_count (void* port_buffer)
855 assert (port_buffer);
856 return static_cast<DummyMidiBuffer*>(port_buffer)->size ();
860 DummyAudioBackend::midi_clear (void* port_buffer)
862 assert (port_buffer);
863 DummyMidiBuffer * buf = static_cast<DummyMidiBuffer*>(port_buffer);
871 DummyAudioBackend::can_monitor_input () const
877 DummyAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
883 DummyAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
889 DummyAudioBackend::monitoring_input (PortEngine::PortHandle)
894 /* Latency management */
897 DummyAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
899 if (!valid_port (port)) {
900 PBD::error << _("DummyPort::set_latency_range (): invalid port.") << endmsg;
902 static_cast<DummyPort*>(port)->set_latency_range (latency_range, for_playback);
906 DummyAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
908 if (!valid_port (port)) {
909 PBD::error << _("DummyPort::get_latency_range (): invalid port.") << endmsg;
915 return static_cast<DummyPort*>(port)->latency_range (for_playback);
918 /* Discovering physical ports */
921 DummyAudioBackend::port_is_physical (PortEngine::PortHandle port) const
923 if (!valid_port (port)) {
924 PBD::error << _("DummyPort::port_is_physical (): invalid port.") << endmsg;
927 return static_cast<DummyPort*>(port)->is_physical ();
931 DummyAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
933 for (size_t i = 0; i < _ports.size (); ++i) {
934 DummyPort* port = _ports[i];
935 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
936 port_names.push_back (port->name ());
942 DummyAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
944 for (size_t i = 0; i < _ports.size (); ++i) {
945 DummyPort* port = _ports[i];
946 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
947 port_names.push_back (port->name ());
953 DummyAudioBackend::n_physical_outputs () const
957 for (size_t i = 0; i < _ports.size (); ++i) {
958 DummyPort* port = _ports[i];
959 if (port->is_output () && port->is_physical ()) {
960 switch (port->type ()) {
961 case DataType::AUDIO: ++n_audio; break;
962 case DataType::MIDI: ++n_midi; break;
968 cc.set (DataType::AUDIO, n_audio);
969 cc.set (DataType::MIDI, n_midi);
974 DummyAudioBackend::n_physical_inputs () const
978 for (size_t i = 0; i < _ports.size (); ++i) {
979 DummyPort* port = _ports[i];
980 if (port->is_input () && port->is_physical ()) {
981 switch (port->type ()) {
982 case DataType::AUDIO: ++n_audio; break;
983 case DataType::MIDI: ++n_midi; break;
989 cc.set (DataType::AUDIO, n_audio);
990 cc.set (DataType::MIDI, n_midi);
994 /* Getting access to the data buffer for a port */
997 DummyAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1000 assert (valid_port (port));
1001 return static_cast<DummyPort*>(port)->get_buffer (nframes);
1004 /* Engine Process */
1006 DummyAudioBackend::main_process_thread ()
1008 AudioEngine::thread_init_callback (this);
1010 _processed_samples = 0;
1012 manager.registration_callback();
1013 manager.graph_order_callback();
1015 uint64_t clock1, clock2;
1016 clock1 = g_get_monotonic_time();
1018 if (engine.process_callback (_samples_per_period)) {
1021 _processed_samples += _samples_per_period;
1022 if (!_freewheeling) {
1023 clock2 = g_get_monotonic_time();
1024 const int64_t elapsed_time = clock2 - clock1;
1025 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1026 _dsp_load = elapsed_time / (float) nomial_time;
1027 if (elapsed_time < nomial_time) {
1028 Glib::usleep (nomial_time - elapsed_time);
1030 Glib::usleep (100); // don't hog cpu
1034 Glib::usleep (100); // don't hog cpu
1036 clock1 = g_get_monotonic_time();
1038 bool connections_changed = false;
1039 bool ports_changed = false;
1040 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1041 if (_port_change_flag) {
1042 ports_changed = true;
1043 _port_change_flag = false;
1045 if (!_port_connection_queue.empty ()) {
1046 connections_changed = true;
1048 while (!_port_connection_queue.empty ()) {
1049 PortConnectData *c = _port_connection_queue.back ();
1050 manager.connect_callback (c->a, c->b, c->c);
1051 _port_connection_queue.pop_back ();
1054 pthread_mutex_unlock (&_port_callback_mutex);
1056 if (ports_changed) {
1057 manager.registration_callback();
1059 if (connections_changed) {
1060 manager.graph_order_callback();
1062 if (connections_changed || ports_changed) {
1063 engine.latency_callback(false);
1064 engine.latency_callback(true);
1073 /******************************************************************************/
1075 static boost::shared_ptr<DummyAudioBackend> _instance;
1077 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1078 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1079 static int deinstantiate ();
1080 static bool already_configured ();
1082 static ARDOUR::AudioBackendInfo _descriptor = {
1090 static boost::shared_ptr<AudioBackend>
1091 backend_factory (AudioEngine& e)
1094 _instance.reset (new DummyAudioBackend (e, _descriptor));
1100 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1102 s_instance_name = arg1;
1114 already_configured ()
1119 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1121 return &_descriptor;
1125 /******************************************************************************/
1126 DummyPort::DummyPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1127 : _dummy_backend (b)
1131 _capture_latency_range.min = 0;
1132 _capture_latency_range.max = 0;
1133 _playback_latency_range.min = 0;
1134 _playback_latency_range.max = 0;
1135 _dummy_backend.port_connect_add_remove_callback();
1138 DummyPort::~DummyPort () {
1140 _dummy_backend.port_connect_add_remove_callback();
1144 int DummyPort::connect (DummyPort *port)
1147 PBD::error << _("DummyPort::connect (): invalid (null) port") << endmsg;
1151 if (type () != port->type ()) {
1152 PBD::error << _("DummyPort::connect (): wrong port-type") << endmsg;
1156 if (is_output () && port->is_output ()) {
1157 PBD::error << _("DummyPort::connect (): cannot inter-connect output ports.") << endmsg;
1161 if (is_input () && port->is_input ()) {
1162 PBD::error << _("DummyPort::connect (): cannot inter-connect input ports.") << endmsg;
1167 PBD::error << _("DummyPort::connect (): cannot self-connect ports.") << endmsg;
1171 if (is_connected (port)) {
1172 #if 0 // don't bother to warn about this for now. just ignore it
1173 PBD::error << _("DummyPort::connect (): ports are already connected:")
1174 << " (" << name () << ") -> (" << port->name () << ")"
1180 _connect (port, true);
1185 void DummyPort::_connect (DummyPort *port, bool callback)
1187 _connections.push_back (port);
1189 port->_connect (this, false);
1190 _dummy_backend.port_connect_callback (name(), port->name(), true);
1194 int DummyPort::disconnect (DummyPort *port)
1197 PBD::error << _("DummyPort::disconnect (): invalid (null) port") << endmsg;
1201 if (!is_connected (port)) {
1202 PBD::error << _("DummyPort::disconnect (): ports are not connected:")
1203 << " (" << name () << ") -> (" << port->name () << ")"
1207 _disconnect (port, true);
1211 void DummyPort::_disconnect (DummyPort *port, bool callback)
1213 std::vector<DummyPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1215 assert (it != _connections.end ());
1217 _connections.erase (it);
1220 port->_disconnect (this, false);
1221 _dummy_backend.port_connect_callback (name(), port->name(), false);
1226 void DummyPort::disconnect_all ()
1228 while (!_connections.empty ()) {
1229 _connections.back ()->_disconnect (this, false);
1230 _dummy_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1231 _connections.pop_back ();
1236 DummyPort::is_connected (const DummyPort *port) const
1238 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1241 bool DummyPort::is_physically_connected () const
1243 for (std::vector<DummyPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1244 if ((*it)->is_physical ()) {
1251 /******************************************************************************/
1253 DummyAudioPort::DummyAudioPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1254 : DummyPort (b, name, flags)
1256 memset (_buffer, 0, sizeof (_buffer));
1259 DummyAudioPort::~DummyAudioPort () { }
1261 void* DummyAudioPort::get_buffer (pframes_t n_samples)
1264 std::vector<DummyPort*>::const_iterator it = get_connections ().begin ();
1265 if (it == get_connections ().end ()) {
1266 memset (_buffer, 0, n_samples * sizeof (Sample));
1268 DummyAudioPort const * source = static_cast<const DummyAudioPort*>(*it);
1269 assert (source && source->is_output ());
1270 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1271 while (++it != get_connections ().end ()) {
1272 source = static_cast<const DummyAudioPort*>(*it);
1273 assert (source && source->is_output ());
1274 Sample* dst = buffer ();
1275 const Sample* src = source->const_buffer ();
1276 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1281 } else if (is_output () && is_physical () && is_terminal()) {
1282 memset (_buffer, 0, n_samples * sizeof (Sample));
1288 DummyMidiPort::DummyMidiPort (DummyAudioBackend &b, const std::string& name, PortFlags flags)
1289 : DummyPort (b, name, flags)
1294 DummyMidiPort::~DummyMidiPort () { }
1296 struct MidiEventSorter {
1297 bool operator() (const boost::shared_ptr<DummyMidiEvent>& a, const boost::shared_ptr<DummyMidiEvent>& b) {
1302 void* DummyMidiPort::get_buffer (pframes_t /* nframes */)
1306 for (std::vector<DummyPort*>::const_iterator i = get_connections ().begin ();
1307 i != get_connections ().end ();
1309 const DummyMidiBuffer src = static_cast<const DummyMidiPort*>(*i)->const_buffer ();
1310 for (DummyMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
1311 _buffer.push_back (boost::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (**it)));
1314 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1315 } else if (is_output () && is_physical () && is_terminal()) {
1321 DummyMidiEvent::DummyMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1323 , _timestamp (timestamp)
1327 _data = (uint8_t*) malloc (size);
1328 memcpy (_data, data, size);
1332 DummyMidiEvent::DummyMidiEvent (const DummyMidiEvent& other)
1333 : _size (other.size ())
1334 , _timestamp (other.timestamp ())
1337 if (other.size () && other.const_data ()) {
1338 _data = (uint8_t*) malloc (other.size ());
1339 memcpy (_data, other.const_data (), other.size ());
1343 DummyMidiEvent::~DummyMidiEvent () {