2 * Copyright (C) 2014 Robin Gareus <robin@gareus.org>
3 * Copyright (C) 2013 Paul Davis
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "alsa_audiobackend.h"
27 #include "rt_thread.h"
29 #include "pbd/compose.h"
30 #include "pbd/error.h"
31 #include "pbd/file_utils.h"
32 #include "ardour/filesystem_paths.h"
33 #include "ardour/port_manager.h"
34 #include "ardouralsautil/devicelist.h"
37 using namespace ARDOUR;
39 static std::string s_instance_name;
40 size_t AlsaAudioBackend::_max_buffer_size = 8192;
42 AlsaAudioBackend::AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info)
43 : AudioBackend (e, info)
47 , _freewheeling (false)
50 , _device_reservation(0)
52 , _samples_per_period (1024)
53 , _periods_per_cycle (2)
57 , _systemic_input_latency (0)
58 , _systemic_output_latency (0)
59 , _processed_samples (0)
61 _instance_name = s_instance_name;
62 pthread_mutex_init (&_port_callback_mutex, 0);
65 AlsaAudioBackend::~AlsaAudioBackend ()
67 pthread_mutex_destroy (&_port_callback_mutex);
70 /* AUDIOBACKEND API */
73 AlsaAudioBackend::name () const
79 AlsaAudioBackend::is_realtime () const
84 std::vector<AudioBackend::DeviceStatus>
85 AlsaAudioBackend::enumerate_devices () const
87 std::vector<AudioBackend::DeviceStatus> s;
88 std::map<std::string, std::string> devices;
89 get_alsa_audio_device_names(devices);
90 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
91 s.push_back (DeviceStatus (i->first, true));
97 AlsaAudioBackend::reservation_stdout (std::string d, size_t /* s */)
99 if (d.substr(0, 19) == "Acquired audio-card") {
100 _reservation_succeeded = true;
105 AlsaAudioBackend::release_device()
107 _reservation_connection.drop_connections();
108 delete _device_reservation;
109 _device_reservation = 0;
113 AlsaAudioBackend::acquire_device(const char* device_name)
115 /* This is quick hack, ideally we'll link against libdbus and implement a dbus-listener
116 * that owns the device. here we try to get away by just requesting it and then block it...
117 * (pulseaudio periodically checks anyway)
119 * dbus-send --session --print-reply --type=method_call --dest=org.freedesktop.ReserveDevice1.Audio2 /org/freedesktop/ReserveDevice1/Audio2 org.freedesktop.ReserveDevice1.RequestRelease int32:4
120 * -> should not return 'boolean false'
122 int device_number = card_to_num(device_name);
123 if (device_number < 0) return false;
125 assert(_device_reservation == 0);
126 _reservation_succeeded = false;
128 std::string request_device_exe;
129 if (!PBD::find_file_in_search_path (
130 PBD::Searchpath(Glib::build_filename(ARDOUR::ardour_dll_directory(), "ardouralsautil")
131 + G_SEARCHPATH_SEPARATOR_S + ARDOUR::ardour_dll_directory()),
132 "ardour-request-device", request_device_exe))
134 PBD::warning << "ardour-request-device binary was not found..'" << endmsg;
141 argp=(char**) calloc(3,sizeof(char*));
142 argp[0] = strdup(request_device_exe.c_str());
143 snprintf(tmp, sizeof(tmp), "Audio%d", device_number);
144 argp[1] = strdup(tmp);
147 _device_reservation = new ARDOUR::SystemExec(request_device_exe, argp);
148 _device_reservation->ReadStdout.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::reservation_stdout, this, _1 ,_2));
149 _device_reservation->Terminated.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::release_device, this));
150 if (_device_reservation->start(0)) {
151 PBD::warning << _("AlsaAudioBackend: Device Request failed.") << endmsg;
156 // wait to check if reservation suceeded.
157 int timeout = 500; // 5 sec
158 while (_device_reservation && !_reservation_succeeded && --timeout > 0) {
161 if (timeout == 0 || !_reservation_succeeded) {
162 PBD::warning << _("AlsaAudioBackend: Device Reservation failed.") << endmsg;
170 AlsaAudioBackend::available_sample_rates (const std::string&) const
172 std::vector<float> sr;
173 sr.push_back (8000.0);
174 sr.push_back (22050.0);
175 sr.push_back (24000.0);
176 sr.push_back (44100.0);
177 sr.push_back (48000.0);
178 sr.push_back (88200.0);
179 sr.push_back (96000.0);
180 sr.push_back (176400.0);
181 sr.push_back (192000.0);
185 std::vector<uint32_t>
186 AlsaAudioBackend::available_buffer_sizes (const std::string&) const
188 std::vector<uint32_t> bs;
202 AlsaAudioBackend::available_input_channel_count (const std::string&) const
204 return 128; // TODO query current device
208 AlsaAudioBackend::available_output_channel_count (const std::string&) const
210 return 128; // TODO query current device
214 AlsaAudioBackend::can_change_sample_rate_when_running () const
220 AlsaAudioBackend::can_change_buffer_size_when_running () const
226 AlsaAudioBackend::set_device_name (const std::string& d)
233 AlsaAudioBackend::set_sample_rate (float sr)
235 if (sr <= 0) { return -1; }
237 engine.sample_rate_change (sr);
242 AlsaAudioBackend::set_buffer_size (uint32_t bs)
244 if (bs <= 0 || bs >= _max_buffer_size) {
247 _samples_per_period = bs;
248 engine.buffer_size_change (bs);
253 AlsaAudioBackend::set_interleaved (bool yn)
255 if (!yn) { return 0; }
260 AlsaAudioBackend::set_input_channels (uint32_t cc)
267 AlsaAudioBackend::set_output_channels (uint32_t cc)
274 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
276 _systemic_input_latency = sl;
281 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
283 _systemic_output_latency = sl;
287 /* Retrieving parameters */
289 AlsaAudioBackend::device_name () const
291 return _audio_device;
295 AlsaAudioBackend::sample_rate () const
301 AlsaAudioBackend::buffer_size () const
303 return _samples_per_period;
307 AlsaAudioBackend::interleaved () const
313 AlsaAudioBackend::input_channels () const
319 AlsaAudioBackend::output_channels () const
325 AlsaAudioBackend::systemic_input_latency () const
327 return _systemic_input_latency;
331 AlsaAudioBackend::systemic_output_latency () const
333 return _systemic_output_latency;
337 std::vector<std::string>
338 AlsaAudioBackend::enumerate_midi_options () const
340 std::vector<std::string> m;
341 m.push_back (_("-None-"));
342 std::map<std::string, std::string> devices;
343 get_alsa_rawmidi_device_names(devices);
345 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
346 m.push_back (i->first);
349 m.push_back (_("-All-"));
355 AlsaAudioBackend::set_midi_option (const std::string& opt)
362 AlsaAudioBackend::midi_option () const
369 static void * pthread_process (void *arg)
371 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
372 d->main_process_thread ();
378 AlsaAudioBackend::_start (bool for_latency_measurement)
380 if (_active || _run) {
381 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
386 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
387 _system_inputs.clear();
388 _system_outputs.clear();
389 _system_midi_in.clear();
390 _system_midi_out.clear();
396 assert(_rmidi_in.size() == 0);
397 assert(_rmidi_out.size() == 0);
400 std::string alsa_device;
401 std::map<std::string, std::string> devices;
402 get_alsa_audio_device_names(devices);
403 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
404 if (i->first == _audio_device) {
405 alsa_device = i->second;
410 acquire_device(alsa_device.c_str());
411 _pcmi = new Alsa_pcmi (alsa_device.c_str(), alsa_device.c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
412 switch (_pcmi->state ()) {
413 case 0: /* OK */ break;
414 case -1: PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg; break;
415 case -2: PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg; break;
416 case -3: PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.") << endmsg; break;
417 case -4: PBD::error << _("AlsaAudioBackend: cannot set requested period size.") << endmsg; break;
418 case -5: PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.") << endmsg; break;
419 case -6: PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg; break;
420 default: PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg; break;
422 if (_pcmi->state ()) {
423 delete _pcmi; _pcmi = 0;
432 if (_n_outputs != _pcmi->nplay ()) {
433 if (_n_outputs == 0) {
434 _n_outputs = _pcmi->nplay ();
436 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
438 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
441 if (_n_inputs != _pcmi->ncapt ()) {
442 if (_n_inputs == 0) {
443 _n_inputs = _pcmi->ncapt ();
445 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
447 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
450 if (_pcmi->fsize() != _samples_per_period) {
451 _samples_per_period = _pcmi->fsize();
452 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
455 if (_pcmi->fsamp() != _samplerate) {
456 _samplerate = _pcmi->fsamp();
457 engine.sample_rate_change (_samplerate);
458 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
461 if (for_latency_measurement) {
462 _systemic_input_latency = 0;
463 _systemic_output_latency = 0;
466 register_system_midi_ports();
468 if (register_system_audio_ports()) {
469 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
470 delete _pcmi; _pcmi = 0;
475 if (engine.reestablish_ports ()) {
476 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
477 delete _pcmi; _pcmi = 0;
482 engine.buffer_size_change (_samples_per_period);
483 engine.reconnect_ports ();
486 if (_realtime_pthread_create (SCHED_FIFO, -20,
487 &_main_thread, pthread_process, this))
489 if (pthread_create (&_main_thread, NULL, pthread_process, this))
491 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
492 delete _pcmi; _pcmi = 0;
497 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
502 while (!_active && --timeout > 0) { Glib::usleep (1000); }
504 if (timeout == 0 || !_active) {
505 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
506 delete _pcmi; _pcmi = 0;
516 AlsaAudioBackend::stop ()
524 if (pthread_join (_main_thread, &status)) {
525 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
529 while (!_rmidi_out.empty ()) {
530 AlsaRawMidiIO *m = _rmidi_out.back ();
532 _rmidi_out.pop_back ();
535 while (!_rmidi_in.empty ()) {
536 AlsaRawMidiIO *m = _rmidi_in.back ();
538 _rmidi_in.pop_back ();
542 unregister_system_ports();
543 delete _pcmi; _pcmi = 0;
546 return (_active == false) ? 0 : -1;
550 AlsaAudioBackend::freewheel (bool onoff)
552 if (onoff == _freewheeling) {
555 _freewheeling = onoff;
556 engine.freewheel_callback (onoff);
561 AlsaAudioBackend::dsp_load () const
563 return 100.f * _dsp_load;
567 AlsaAudioBackend::raw_buffer_size (DataType t)
570 case DataType::AUDIO:
571 return _samples_per_period * sizeof(Sample);
573 return _max_buffer_size; // XXX not really limited
580 AlsaAudioBackend::sample_time ()
582 return _processed_samples;
586 AlsaAudioBackend::sample_time_at_cycle_start ()
588 return _processed_samples;
592 AlsaAudioBackend::samples_since_cycle_start ()
599 AlsaAudioBackend::alsa_process_thread (void *arg)
601 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
602 boost::function<void ()> f = td->f;
609 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
613 size_t stacksize = 100000;
615 pthread_attr_init (&attr);
616 pthread_attr_setstacksize (&attr, stacksize);
617 ThreadData* td = new ThreadData (this, func, stacksize);
619 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
620 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
621 pthread_attr_destroy (&attr);
624 pthread_attr_destroy (&attr);
626 _threads.push_back (thread_id);
631 AlsaAudioBackend::join_process_threads ()
635 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
638 if (pthread_join (*i, &status)) {
639 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
648 AlsaAudioBackend::in_process_thread ()
650 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
652 if (pthread_equal (*i, pthread_self ()) != 0) {
660 AlsaAudioBackend::process_thread_count ()
662 return _threads.size ();
666 AlsaAudioBackend::update_latencies ()
673 AlsaAudioBackend::private_handle () const
679 AlsaAudioBackend::my_name () const
681 return _instance_name;
685 AlsaAudioBackend::available () const
687 return _run && _active;
691 AlsaAudioBackend::port_name_size () const
697 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
699 if (!valid_port (port)) {
700 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
703 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
707 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
709 if (!valid_port (port)) {
710 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
711 return std::string ();
713 return static_cast<AlsaPort*>(port)->name ();
716 PortEngine::PortHandle
717 AlsaAudioBackend::get_port_by_name (const std::string& name) const
719 PortHandle port = (PortHandle) find_port (name);
724 AlsaAudioBackend::get_ports (
725 const std::string& port_name_pattern,
726 DataType type, PortFlags flags,
727 std::vector<std::string>& port_names) const
731 bool use_regexp = false;
732 if (port_name_pattern.size () > 0) {
733 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
737 for (size_t i = 0; i < _ports.size (); ++i) {
738 AlsaPort* port = _ports[i];
739 if ((port->type () == type) && (port->flags () & flags)) {
740 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
741 port_names.push_back (port->name ());
747 regfree (&port_regex);
753 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
755 if (!valid_port (port)) {
756 return DataType::NIL;
758 return static_cast<AlsaPort*>(port)->type ();
761 PortEngine::PortHandle
762 AlsaAudioBackend::register_port (
763 const std::string& name,
764 ARDOUR::DataType type,
765 ARDOUR::PortFlags flags)
767 if (name.size () == 0) { return 0; }
768 if (flags & IsPhysical) { return 0; }
769 return add_port (_instance_name + ":" + name, type, flags);
772 PortEngine::PortHandle
773 AlsaAudioBackend::add_port (
774 const std::string& name,
775 ARDOUR::DataType type,
776 ARDOUR::PortFlags flags)
778 assert(name.size ());
779 if (find_port (name)) {
780 PBD::error << _("AlsaBackend::register_port: Port already exists:")
781 << " (" << name << ")" << endmsg;
784 AlsaPort* port = NULL;
786 case DataType::AUDIO:
787 port = new AlsaAudioPort (*this, name, flags);
790 port = new AlsaMidiPort (*this, name, flags);
793 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
797 _ports.push_back (port);
803 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
805 if (!valid_port (port_handle)) {
806 PBD::error << _("AlsaBackend::unregister_port: Invalid Port.") << endmsg;
808 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
809 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
810 if (i == _ports.end ()) {
811 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
814 disconnect_all(port_handle);
820 AlsaAudioBackend::register_system_audio_ports()
824 const int a_ins = _n_inputs > 0 ? _n_inputs : 2;
825 const int a_out = _n_outputs > 0 ? _n_outputs : 2;
828 lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_input_latency;
829 for (int i = 1; i <= a_ins; ++i) {
831 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
832 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
834 set_latency_range (p, false, lr);
835 _system_inputs.push_back(static_cast<AlsaPort*>(p));
838 lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_output_latency;
839 for (int i = 1; i <= a_out; ++i) {
841 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
842 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
844 set_latency_range (p, false, lr);
845 _system_outputs.push_back(static_cast<AlsaPort*>(p));
851 AlsaAudioBackend::register_system_midi_ports()
854 std::vector<std::string> devices;
856 if (_midi_device == _("-None-")) {
859 else if (_midi_device == _("-All-")) {
860 std::map<std::string, std::string> devmap;
861 get_alsa_rawmidi_device_names(devmap);
862 for (std::map<std::string, std::string>::const_iterator i = devmap.begin (); i != devmap.end(); ++i) {
863 devices.push_back (i->second);
866 std::map<std::string, std::string> devmap;
867 get_alsa_rawmidi_device_names(devmap);
868 for (std::map<std::string, std::string>::const_iterator i = devmap.begin (); i != devmap.end(); ++i) {
869 if (i->first == _midi_device) {
870 devices.push_back (i->second);
876 for (std::vector<std::string>::const_iterator i = devices.begin (); i != devices.end (); ++i) {
878 AlsaRawMidiOut *mout = new AlsaRawMidiOut (i->c_str());
879 if (mout->state ()) {
880 PBD::warning << string_compose (
881 _("AlsaRawMidiOut: failed to open midi device '%1'."), *i)
885 mout->setup_timing(_samples_per_period, _samplerate);
886 mout->sync_time (g_get_monotonic_time());
887 if (mout->start ()) {
888 PBD::warning << string_compose (
889 _("AlsaRawMidiOut: failed to start midi device '%1'."), *i)
893 _rmidi_out.push_back (mout);
897 AlsaRawMidiIn *midin = new AlsaRawMidiIn (i->c_str());
898 if (midin->state ()) {
899 PBD::warning << string_compose (
900 _("AlsaRawMidiIn: failed to open midi device '%1'."), *i)
904 midin->setup_timing(_samples_per_period, _samplerate);
905 midin->sync_time (g_get_monotonic_time());
906 if (midin->start ()) {
907 PBD::warning << string_compose (
908 _("AlsaRawMidiIn: failed to start midi device '%1'."), *i)
912 _rmidi_in.push_back (midin);
917 const int m_ins = _rmidi_in.size();
918 const int m_out = _rmidi_out.size();
920 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
921 for (int i = 1; i <= m_ins; ++i) {
923 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
924 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
926 set_latency_range (p, false, lr);
927 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
930 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
931 for (int i = 1; i <= m_out; ++i) {
933 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
934 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
936 set_latency_range (p, false, lr);
937 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
944 AlsaAudioBackend::unregister_system_ports()
947 _system_inputs.clear();
948 _system_outputs.clear();
949 _system_midi_in.clear();
950 _system_midi_out.clear();
951 while (i < _ports.size ()) {
952 AlsaPort* port = _ports[i];
953 if (port->is_physical () && port->is_terminal ()) {
954 port->disconnect_all ();
955 _ports.erase (_ports.begin() + i);
963 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
965 AlsaPort* src_port = find_port (src);
966 AlsaPort* dst_port = find_port (dst);
969 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
970 << " (" << src <<")" << endmsg;
974 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
975 << " (" << dst <<")" << endmsg;
978 return src_port->connect (dst_port);
982 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
984 AlsaPort* src_port = find_port (src);
985 AlsaPort* dst_port = find_port (dst);
987 if (!src_port || !dst_port) {
988 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
991 return src_port->disconnect (dst_port);
995 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
997 AlsaPort* dst_port = find_port (dst);
998 if (!valid_port (src)) {
999 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1003 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1004 << " (" << dst << ")" << endmsg;
1007 return static_cast<AlsaPort*>(src)->connect (dst_port);
1011 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1013 AlsaPort* dst_port = find_port (dst);
1014 if (!valid_port (src) || !dst_port) {
1015 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1018 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1022 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1024 if (!valid_port (port)) {
1025 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1028 static_cast<AlsaPort*>(port)->disconnect_all ();
1033 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1035 if (!valid_port (port)) {
1036 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1039 return static_cast<AlsaPort*>(port)->is_connected ();
1043 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1045 AlsaPort* dst_port = find_port (dst);
1046 if (!valid_port (src) || !dst_port) {
1047 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1050 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1054 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1056 if (!valid_port (port)) {
1057 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1060 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1064 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1066 if (!valid_port (port)) {
1067 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1071 assert (0 == names.size ());
1073 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1075 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1076 names.push_back ((*i)->name ());
1079 return (int)names.size ();
1084 AlsaAudioBackend::midi_event_get (
1085 pframes_t& timestamp,
1086 size_t& size, uint8_t** buf, void* port_buffer,
1087 uint32_t event_index)
1089 assert (buf && port_buffer);
1090 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1091 if (event_index >= source.size ()) {
1094 AlsaMidiEvent * const event = source[event_index].get ();
1096 timestamp = event->timestamp ();
1097 size = event->size ();
1098 *buf = event->data ();
1103 AlsaAudioBackend::midi_event_put (
1105 pframes_t timestamp,
1106 const uint8_t* buffer, size_t size)
1108 assert (buffer && port_buffer);
1109 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1110 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1111 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1112 (pframes_t)dst.back ()->timestamp (), timestamp);
1115 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1120 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1122 assert (port_buffer);
1123 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1127 AlsaAudioBackend::midi_clear (void* port_buffer)
1129 assert (port_buffer);
1130 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1138 AlsaAudioBackend::can_monitor_input () const
1144 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1150 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1156 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1161 /* Latency management */
1164 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1166 if (!valid_port (port)) {
1167 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1169 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1173 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1175 if (!valid_port (port)) {
1176 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1182 return static_cast<AlsaPort*>(port)->latency_range (for_playback);
1185 /* Discovering physical ports */
1188 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1190 if (!valid_port (port)) {
1191 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1194 return static_cast<AlsaPort*>(port)->is_physical ();
1198 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1200 for (size_t i = 0; i < _ports.size (); ++i) {
1201 AlsaPort* port = _ports[i];
1202 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1203 port_names.push_back (port->name ());
1209 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1211 for (size_t i = 0; i < _ports.size (); ++i) {
1212 AlsaPort* port = _ports[i];
1213 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1214 port_names.push_back (port->name ());
1220 AlsaAudioBackend::n_physical_outputs () const
1224 for (size_t i = 0; i < _ports.size (); ++i) {
1225 AlsaPort* port = _ports[i];
1226 if (port->is_output () && port->is_physical ()) {
1227 switch (port->type ()) {
1228 case DataType::AUDIO: ++n_audio; break;
1229 case DataType::MIDI: ++n_midi; break;
1235 cc.set (DataType::AUDIO, n_audio);
1236 cc.set (DataType::MIDI, n_midi);
1241 AlsaAudioBackend::n_physical_inputs () const
1245 for (size_t i = 0; i < _ports.size (); ++i) {
1246 AlsaPort* port = _ports[i];
1247 if (port->is_input () && port->is_physical ()) {
1248 switch (port->type ()) {
1249 case DataType::AUDIO: ++n_audio; break;
1250 case DataType::MIDI: ++n_midi; break;
1256 cc.set (DataType::AUDIO, n_audio);
1257 cc.set (DataType::MIDI, n_midi);
1261 /* Getting access to the data buffer for a port */
1264 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1267 assert (valid_port (port));
1268 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1271 /* Engine Process */
1273 AlsaAudioBackend::main_process_thread ()
1275 AudioEngine::thread_init_callback (this);
1277 _processed_samples = 0;
1279 uint64_t clock1, clock2;
1280 clock1 = g_get_monotonic_time();
1281 _pcmi->pcm_start ();
1282 int no_proc_errors = 0;
1287 if (!_freewheeling) {
1288 nr = _pcmi->pcm_wait ();
1290 if (_pcmi->state () > 0) {
1294 if (_pcmi->state () < 0 || no_proc_errors > 50) {
1295 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1298 while (nr >= (long)_samples_per_period) {
1300 clock1 = g_get_monotonic_time();
1303 _pcmi->capt_init (_samples_per_period);
1304 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1305 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1307 _pcmi->capt_done (_samples_per_period);
1311 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1312 assert (_rmidi_in.size() > i);
1313 AlsaRawMidiIn *rm = static_cast<AlsaRawMidiIn*>(_rmidi_in.at(i));
1314 void *bptr = (*it)->get_buffer(0);
1316 uint8_t data[64]; // match MaxAlsaRawEventSize in alsa_rawmidi.cc
1317 size_t size = sizeof(data);
1319 while (rm->recv_event (time, data, size)) {
1320 midi_event_put(bptr, time, data, size);
1321 size = sizeof(data);
1323 rm->sync_time (clock1);
1326 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1327 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1330 if (engine.process_callback (_samples_per_period)) {
1338 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1339 assert (_rmidi_out.size() > i);
1340 AlsaRawMidiOut *rm = static_cast<AlsaRawMidiOut*>(_rmidi_out.at(i));
1341 const AlsaMidiBuffer *src = static_cast<const AlsaMidiBuffer*>((*it)->get_buffer(0));
1342 rm->sync_time (clock1); // ?? use clock pre DSP load?
1343 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1344 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1348 /* write back audio */
1350 _pcmi->play_init (_samples_per_period);
1351 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1352 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1354 for (; i < _pcmi->nplay (); ++i) {
1355 _pcmi->clear_chan (i, _samples_per_period);
1357 _pcmi->play_done (_samples_per_period);
1358 nr -= _samples_per_period;
1359 _processed_samples += _samples_per_period;
1361 /* calculate DSP load */
1362 clock2 = g_get_monotonic_time();
1363 const int64_t elapsed_time = clock2 - clock1;
1364 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1365 _dsp_load = elapsed_time / (float) nomial_time;
1368 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1371 fprintf(stderr, "ALSA x-run read: %.1f ms, write: %.1f ms\n",
1372 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1377 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1378 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1380 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1381 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1384 if (engine.process_callback (_samples_per_period)) {
1389 Glib::usleep (100); // don't hog cpu
1392 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1393 while (!_port_connection_queue.empty ()) {
1394 PortConnectData *c = _port_connection_queue.back ();
1395 manager.connect_callback (c->a, c->b, c->c);
1396 _port_connection_queue.pop_back ();
1399 pthread_mutex_unlock (&_port_callback_mutex);
1406 engine.halted_callback("ALSA I/O error.");
1412 /******************************************************************************/
1414 static boost::shared_ptr<AlsaAudioBackend> _instance;
1416 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1417 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1418 static int deinstantiate ();
1419 static bool already_configured ();
1421 static ARDOUR::AudioBackendInfo _descriptor = {
1429 static boost::shared_ptr<AudioBackend>
1430 backend_factory (AudioEngine& e)
1433 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1439 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1441 s_instance_name = arg1;
1453 already_configured ()
1458 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1460 return &_descriptor;
1464 /******************************************************************************/
1465 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1470 _capture_latency_range.min = 0;
1471 _capture_latency_range.max = 0;
1472 _playback_latency_range.min = 0;
1473 _playback_latency_range.max = 0;
1476 AlsaPort::~AlsaPort () {
1481 int AlsaPort::connect (AlsaPort *port)
1484 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1488 if (type () != port->type ()) {
1489 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
1493 if (is_output () && port->is_output ()) {
1494 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
1498 if (is_input () && port->is_input ()) {
1499 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
1504 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
1508 if (is_connected (port)) {
1509 #if 0 // don't bother to warn about this for now. just ignore it
1510 PBD::error << _("AlsaPort::connect (): ports are already connected:")
1511 << " (" << name () << ") -> (" << port->name () << ")"
1517 _connect (port, true);
1522 void AlsaPort::_connect (AlsaPort *port, bool callback)
1524 _connections.push_back (port);
1526 port->_connect (this, false);
1527 _alsa_backend.port_connect_callback (name(), port->name(), true);
1531 int AlsaPort::disconnect (AlsaPort *port)
1534 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
1538 if (!is_connected (port)) {
1539 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
1540 << " (" << name () << ") -> (" << port->name () << ")"
1544 _disconnect (port, true);
1548 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
1550 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1552 assert (it != _connections.end ());
1554 _connections.erase (it);
1557 port->_disconnect (this, false);
1558 _alsa_backend.port_connect_callback (name(), port->name(), false);
1563 void AlsaPort::disconnect_all ()
1565 while (!_connections.empty ()) {
1566 _connections.back ()->_disconnect (this, false);
1567 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1568 _connections.pop_back ();
1573 AlsaPort::is_connected (const AlsaPort *port) const
1575 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1578 bool AlsaPort::is_physically_connected () const
1580 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1581 if ((*it)->is_physical ()) {
1588 /******************************************************************************/
1590 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1591 : AlsaPort (b, name, flags)
1593 memset (_buffer, 0, sizeof (_buffer));
1594 mlock(_buffer, sizeof (_buffer));
1597 AlsaAudioPort::~AlsaAudioPort () { }
1599 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
1602 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
1603 if (it == get_connections ().end ()) {
1604 memset (_buffer, 0, n_samples * sizeof (Sample));
1606 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
1607 assert (source && source->is_output ());
1608 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1609 while (++it != get_connections ().end ()) {
1610 source = static_cast<const AlsaAudioPort*>(*it);
1611 assert (source && source->is_output ());
1612 Sample* dst = buffer ();
1613 const Sample* src = source->const_buffer ();
1614 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1624 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1625 : AlsaPort (b, name, flags)
1630 AlsaMidiPort::~AlsaMidiPort () { }
1632 struct MidiEventSorter {
1633 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
1638 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
1642 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
1643 i != get_connections ().end ();
1645 const AlsaMidiBuffer src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
1646 for (AlsaMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
1647 _buffer.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
1650 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1655 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1657 , _timestamp (timestamp)
1661 _data = (uint8_t*) malloc (size);
1662 memcpy (_data, data, size);
1666 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
1667 : _size (other.size ())
1668 , _timestamp (other.timestamp ())
1671 if (other.size () && other.const_data ()) {
1672 _data = (uint8_t*) malloc (other.size ());
1673 memcpy (_data, other.const_data (), other.size ());
1677 AlsaMidiEvent::~AlsaMidiEvent () {