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;
41 std::vector<std::string> AlsaAudioBackend::_midi_options;
42 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_audio_device_status;
43 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_midi_device_status;
45 AlsaAudioBackend::AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info)
46 : AudioBackend (e, info)
51 , _freewheeling (false)
52 , _measure_latency (false)
54 , _midi_driver_option(_("None"))
55 , _device_reservation(0)
57 , _samples_per_period (1024)
58 , _periods_per_cycle (2)
61 , _systemic_audio_input_latency (0)
62 , _systemic_audio_output_latency (0)
64 , _processed_samples (0)
65 , _port_change_flag (false)
67 _instance_name = s_instance_name;
68 pthread_mutex_init (&_port_callback_mutex, 0);
71 AlsaAudioBackend::~AlsaAudioBackend ()
73 pthread_mutex_destroy (&_port_callback_mutex);
76 /* AUDIOBACKEND API */
79 AlsaAudioBackend::name () const
85 AlsaAudioBackend::is_realtime () const
90 std::vector<AudioBackend::DeviceStatus>
91 AlsaAudioBackend::enumerate_devices () const
93 _audio_device_status.clear();
94 std::map<std::string, std::string> devices;
95 get_alsa_audio_device_names(devices);
96 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
97 if (_audio_device == "") _audio_device = i->first;
98 _audio_device_status.push_back (DeviceStatus (i->first, true));
100 return _audio_device_status;
104 AlsaAudioBackend::reservation_stdout (std::string d, size_t /* s */)
106 if (d.substr(0, 19) == "Acquired audio-card") {
107 _reservation_succeeded = true;
112 AlsaAudioBackend::release_device()
114 _reservation_connection.drop_connections();
115 ARDOUR::SystemExec * tmp = _device_reservation;
116 _device_reservation = 0;
121 AlsaAudioBackend::acquire_device(const char* device_name)
123 /* This is quick hack, ideally we'll link against libdbus and implement a dbus-listener
124 * that owns the device. here we try to get away by just requesting it and then block it...
125 * (pulseaudio periodically checks anyway)
127 * dbus-send --session --print-reply --type=method_call --dest=org.freedesktop.ReserveDevice1.Audio2 /org/freedesktop/ReserveDevice1/Audio2 org.freedesktop.ReserveDevice1.RequestRelease int32:4
128 * -> should not return 'boolean false'
130 int device_number = card_to_num(device_name);
131 if (device_number < 0) return false;
133 assert(_device_reservation == 0);
134 _reservation_succeeded = false;
136 std::string request_device_exe;
137 if (!PBD::find_file (
138 PBD::Searchpath(Glib::build_filename(ARDOUR::ardour_dll_directory(), "ardouralsautil")
139 + G_SEARCHPATH_SEPARATOR_S + ARDOUR::ardour_dll_directory()),
140 "ardour-request-device", request_device_exe))
142 PBD::warning << "ardour-request-device binary was not found..'" << endmsg;
149 argp=(char**) calloc(5,sizeof(char*));
150 argp[0] = strdup(request_device_exe.c_str());
151 argp[1] = strdup("-P");
152 snprintf(tmp, sizeof(tmp), "%d", getpid());
153 argp[2] = strdup(tmp);
154 snprintf(tmp, sizeof(tmp), "Audio%d", device_number);
155 argp[3] = strdup(tmp);
158 _device_reservation = new ARDOUR::SystemExec(request_device_exe, argp);
159 _device_reservation->ReadStdout.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::reservation_stdout, this, _1 ,_2));
160 _device_reservation->Terminated.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::release_device, this));
161 if (_device_reservation->start(0)) {
162 PBD::warning << _("AlsaAudioBackend: Device Request failed.") << endmsg;
167 // wait to check if reservation suceeded.
168 int timeout = 500; // 5 sec
169 while (_device_reservation && !_reservation_succeeded && --timeout > 0) {
172 if (timeout == 0 || !_reservation_succeeded) {
173 PBD::warning << _("AlsaAudioBackend: Device Reservation failed.") << endmsg;
181 AlsaAudioBackend::available_sample_rates (const std::string&) const
183 std::vector<float> sr;
184 sr.push_back (8000.0);
185 sr.push_back (22050.0);
186 sr.push_back (24000.0);
187 sr.push_back (44100.0);
188 sr.push_back (48000.0);
189 sr.push_back (88200.0);
190 sr.push_back (96000.0);
191 sr.push_back (176400.0);
192 sr.push_back (192000.0);
196 std::vector<uint32_t>
197 AlsaAudioBackend::available_buffer_sizes (const std::string&) const
199 std::vector<uint32_t> bs;
213 AlsaAudioBackend::available_input_channel_count (const std::string&) const
215 return 128; // TODO query current device
219 AlsaAudioBackend::available_output_channel_count (const std::string&) const
221 return 128; // TODO query current device
225 AlsaAudioBackend::can_change_sample_rate_when_running () const
231 AlsaAudioBackend::can_change_buffer_size_when_running () const
237 AlsaAudioBackend::set_device_name (const std::string& d)
244 AlsaAudioBackend::set_sample_rate (float sr)
246 if (sr <= 0) { return -1; }
248 engine.sample_rate_change (sr);
253 AlsaAudioBackend::set_buffer_size (uint32_t bs)
255 if (bs <= 0 || bs >= _max_buffer_size) {
258 _samples_per_period = bs;
259 engine.buffer_size_change (bs);
264 AlsaAudioBackend::set_interleaved (bool yn)
266 if (!yn) { return 0; }
271 AlsaAudioBackend::set_input_channels (uint32_t cc)
278 AlsaAudioBackend::set_output_channels (uint32_t cc)
285 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
287 _systemic_audio_input_latency = sl;
292 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
294 _systemic_audio_output_latency = sl;
299 AlsaAudioBackend::set_systemic_midi_input_latency (std::string const device, uint32_t sl)
301 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
303 nfo->systemic_input_latency = sl;
308 AlsaAudioBackend::set_systemic_midi_output_latency (std::string const device, uint32_t sl)
310 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
312 nfo->systemic_output_latency = sl;
316 /* Retrieving parameters */
318 AlsaAudioBackend::device_name () const
320 return _audio_device;
324 AlsaAudioBackend::sample_rate () const
330 AlsaAudioBackend::buffer_size () const
332 return _samples_per_period;
336 AlsaAudioBackend::interleaved () const
342 AlsaAudioBackend::input_channels () const
348 AlsaAudioBackend::output_channels () const
354 AlsaAudioBackend::systemic_input_latency () const
356 return _systemic_audio_input_latency;
360 AlsaAudioBackend::systemic_output_latency () const
362 return _systemic_audio_output_latency;
366 AlsaAudioBackend::systemic_midi_input_latency (std::string const device) const
368 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
370 return nfo->systemic_input_latency;
374 AlsaAudioBackend::systemic_midi_output_latency (std::string const device) const
376 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
378 return nfo->systemic_output_latency;
382 struct AlsaAudioBackend::AlsaMidiDeviceInfo *
383 AlsaAudioBackend::midi_device_info(std::string const name) const {
384 for (std::map<std::string, struct AlsaMidiDeviceInfo*>::const_iterator i = _midi_devices.begin (); i != _midi_devices.end(); ++i) {
385 if (i->first == name) {
390 assert(_midi_driver_option != _("None"));
392 std::map<std::string, std::string> devices;
393 if (_midi_driver_option == _("ALSA raw devices")) {
394 get_alsa_rawmidi_device_names(devices);
396 get_alsa_sequencer_names (devices);
399 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
400 if (i->first == name) {
401 _midi_devices[name] = new AlsaMidiDeviceInfo();
402 return _midi_devices[name];
408 std::vector<std::string>
409 AlsaAudioBackend::enumerate_midi_options () const
411 if (_midi_options.empty()) {
412 _midi_options.push_back (_("ALSA raw devices"));
413 _midi_options.push_back (_("ALSA sequencer"));
414 _midi_options.push_back (_("None"));
416 return _midi_options;
419 std::vector<AudioBackend::DeviceStatus>
420 AlsaAudioBackend::enumerate_midi_devices () const
422 _midi_device_status.clear();
423 std::map<std::string, std::string> devices;
425 if (_midi_driver_option == _("ALSA raw devices")) {
426 get_alsa_rawmidi_device_names (devices);
428 else if (_midi_driver_option == _("ALSA sequencer")) {
429 get_alsa_sequencer_names (devices);
432 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
433 _midi_device_status.push_back (DeviceStatus (i->first, true));
435 return _midi_device_status;
439 AlsaAudioBackend::set_midi_option (const std::string& opt)
441 if (opt != _("None") && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
444 _midi_driver_option = opt;
449 AlsaAudioBackend::midi_option () const
451 return _midi_driver_option;
455 AlsaAudioBackend::set_midi_device_enabled (std::string const device, bool enable)
457 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
459 nfo->enabled = enable;
464 AlsaAudioBackend::midi_device_enabled (std::string const device) const
466 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
467 if (!nfo) return false;
473 static void * pthread_process (void *arg)
475 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
476 d->main_process_thread ();
482 AlsaAudioBackend::_start (bool for_latency_measurement)
484 if (!_active && _run) {
485 // recover from 'halted', reap threads
489 if (_active || _run) {
490 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
495 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
496 _system_inputs.clear();
497 _system_outputs.clear();
498 _system_midi_in.clear();
499 _system_midi_out.clear();
505 assert(_rmidi_in.size() == 0);
506 assert(_rmidi_out.size() == 0);
509 std::string alsa_device;
510 std::map<std::string, std::string> devices;
511 get_alsa_audio_device_names(devices);
512 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
513 if (i->first == _audio_device) {
514 alsa_device = i->second;
519 acquire_device(alsa_device.c_str());
520 _pcmi = new Alsa_pcmi (alsa_device.c_str(), alsa_device.c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
521 switch (_pcmi->state ()) {
522 case 0: /* OK */ break;
523 case -1: PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg; break;
524 case -2: PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg; break;
525 case -3: PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.") << endmsg; break;
526 case -4: PBD::error << _("AlsaAudioBackend: cannot set requested period size.") << endmsg; break;
527 case -5: PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.") << endmsg; break;
528 case -6: PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg; break;
529 default: PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg; break;
531 if (_pcmi->state ()) {
532 delete _pcmi; _pcmi = 0;
541 if (_n_outputs != _pcmi->nplay ()) {
542 if (_n_outputs == 0) {
543 _n_outputs = _pcmi->nplay ();
545 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
547 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
550 if (_n_inputs != _pcmi->ncapt ()) {
551 if (_n_inputs == 0) {
552 _n_inputs = _pcmi->ncapt ();
554 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
556 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
559 if (_pcmi->fsize() != _samples_per_period) {
560 _samples_per_period = _pcmi->fsize();
561 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
564 if (_pcmi->fsamp() != _samplerate) {
565 _samplerate = _pcmi->fsamp();
566 engine.sample_rate_change (_samplerate);
567 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
570 _measure_latency = for_latency_measurement;
572 register_system_midi_ports();
574 if (register_system_audio_ports()) {
575 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
576 delete _pcmi; _pcmi = 0;
581 engine.sample_rate_change (_samplerate);
582 engine.buffer_size_change (_samples_per_period);
584 if (engine.reestablish_ports ()) {
585 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
586 delete _pcmi; _pcmi = 0;
591 engine.reconnect_ports ();
593 _port_change_flag = false;
595 if (_realtime_pthread_create (SCHED_FIFO, -20, 100000,
596 &_main_thread, pthread_process, this))
598 if (pthread_create (&_main_thread, NULL, pthread_process, this))
600 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
601 delete _pcmi; _pcmi = 0;
606 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
611 while (!_active && --timeout > 0) { Glib::usleep (1000); }
613 if (timeout == 0 || !_active) {
614 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
615 delete _pcmi; _pcmi = 0;
625 AlsaAudioBackend::stop ()
633 if (pthread_join (_main_thread, &status)) {
634 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
638 while (!_rmidi_out.empty ()) {
639 AlsaMidiIO *m = _rmidi_out.back ();
641 _rmidi_out.pop_back ();
644 while (!_rmidi_in.empty ()) {
645 AlsaMidiIO *m = _rmidi_in.back ();
647 _rmidi_in.pop_back ();
652 delete _pcmi; _pcmi = 0;
655 return (_active == false) ? 0 : -1;
659 AlsaAudioBackend::freewheel (bool onoff)
661 _freewheeling = onoff;
666 AlsaAudioBackend::dsp_load () const
668 return 100.f * _dsp_load;
672 AlsaAudioBackend::raw_buffer_size (DataType t)
675 case DataType::AUDIO:
676 return _samples_per_period * sizeof(Sample);
678 return _max_buffer_size; // XXX not really limited
685 AlsaAudioBackend::sample_time ()
687 return _processed_samples;
691 AlsaAudioBackend::sample_time_at_cycle_start ()
693 return _processed_samples;
697 AlsaAudioBackend::samples_since_cycle_start ()
704 AlsaAudioBackend::alsa_process_thread (void *arg)
706 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
707 boost::function<void ()> f = td->f;
714 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
718 size_t stacksize = 100000;
720 ThreadData* td = new ThreadData (this, func, stacksize);
722 if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
723 &thread_id, alsa_process_thread, td)) {
724 pthread_attr_init (&attr);
725 pthread_attr_setstacksize (&attr, stacksize);
726 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
727 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
728 pthread_attr_destroy (&attr);
731 pthread_attr_destroy (&attr);
734 _threads.push_back (thread_id);
739 AlsaAudioBackend::join_process_threads ()
743 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
746 if (pthread_join (*i, &status)) {
747 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
756 AlsaAudioBackend::in_process_thread ()
758 if (pthread_equal (_main_thread, pthread_self()) != 0) {
762 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
764 if (pthread_equal (*i, pthread_self ()) != 0) {
772 AlsaAudioBackend::process_thread_count ()
774 return _threads.size ();
778 AlsaAudioBackend::update_latencies ()
780 // trigger latency callback in RT thread (locked graph)
781 port_connect_add_remove_callback();
787 AlsaAudioBackend::private_handle () const
793 AlsaAudioBackend::my_name () const
795 return _instance_name;
799 AlsaAudioBackend::available () const
801 return _run && _active;
805 AlsaAudioBackend::port_name_size () const
811 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
813 if (!valid_port (port)) {
814 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
817 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
821 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
823 if (!valid_port (port)) {
824 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
825 return std::string ();
827 return static_cast<AlsaPort*>(port)->name ();
830 PortEngine::PortHandle
831 AlsaAudioBackend::get_port_by_name (const std::string& name) const
833 PortHandle port = (PortHandle) find_port (name);
838 AlsaAudioBackend::get_ports (
839 const std::string& port_name_pattern,
840 DataType type, PortFlags flags,
841 std::vector<std::string>& port_names) const
845 bool use_regexp = false;
846 if (port_name_pattern.size () > 0) {
847 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
851 for (size_t i = 0; i < _ports.size (); ++i) {
852 AlsaPort* port = _ports[i];
853 if ((port->type () == type) && (port->flags () & flags)) {
854 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
855 port_names.push_back (port->name ());
861 regfree (&port_regex);
867 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
869 if (!valid_port (port)) {
870 return DataType::NIL;
872 return static_cast<AlsaPort*>(port)->type ();
875 PortEngine::PortHandle
876 AlsaAudioBackend::register_port (
877 const std::string& name,
878 ARDOUR::DataType type,
879 ARDOUR::PortFlags flags)
881 if (name.size () == 0) { return 0; }
882 if (flags & IsPhysical) { return 0; }
883 return add_port (_instance_name + ":" + name, type, flags);
886 PortEngine::PortHandle
887 AlsaAudioBackend::add_port (
888 const std::string& name,
889 ARDOUR::DataType type,
890 ARDOUR::PortFlags flags)
892 assert(name.size ());
893 if (find_port (name)) {
894 PBD::error << _("AlsaBackend::register_port: Port already exists:")
895 << " (" << name << ")" << endmsg;
898 AlsaPort* port = NULL;
900 case DataType::AUDIO:
901 port = new AlsaAudioPort (*this, name, flags);
904 port = new AlsaMidiPort (*this, name, flags);
907 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
911 _ports.push_back (port);
917 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
922 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
923 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
924 if (i == _ports.end ()) {
925 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
928 disconnect_all(port_handle);
934 AlsaAudioBackend::register_system_audio_ports()
938 const int a_ins = _n_inputs > 0 ? _n_inputs : 2;
939 const int a_out = _n_outputs > 0 ? _n_outputs : 2;
942 lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : _systemic_audio_input_latency);
943 for (int i = 1; i <= a_ins; ++i) {
945 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
946 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
948 set_latency_range (p, false, lr);
949 _system_inputs.push_back(static_cast<AlsaPort*>(p));
952 lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : _systemic_audio_output_latency);
953 for (int i = 1; i <= a_out; ++i) {
955 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
956 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
958 set_latency_range (p, true, lr);
959 _system_outputs.push_back(static_cast<AlsaPort*>(p));
965 AlsaAudioBackend::register_system_midi_ports()
967 std::map<std::string, std::string> devices;
971 if (_midi_driver_option == _("None")) {
973 } else if (_midi_driver_option == _("ALSA raw devices")) {
974 get_alsa_rawmidi_device_names(devices);
976 get_alsa_sequencer_names (devices);
979 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
980 struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first);
982 if (!nfo->enabled) continue;
985 if (_midi_driver_option == _("ALSA raw devices")) {
986 mout = new AlsaRawMidiOut (i->second.c_str());
988 mout = new AlsaSeqMidiOut (i->second.c_str());
991 if (mout->state ()) {
992 PBD::warning << string_compose (
993 _("AlsaMidiOut: failed to open midi device '%1'."), i->second)
997 mout->setup_timing(_samples_per_period, _samplerate);
998 mout->sync_time (g_get_monotonic_time());
999 if (mout->start ()) {
1000 PBD::warning << string_compose (
1001 _("AlsaMidiOut: failed to start midi device '%1'."), i->second)
1006 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", ++midi_ins);
1007 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1013 lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : nfo->systemic_output_latency);
1014 set_latency_range (p, false, lr);
1015 static_cast<AlsaMidiPort*>(p)->set_n_periods(2);
1016 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
1017 _rmidi_out.push_back (mout);
1022 if (_midi_driver_option == _("ALSA raw devices")) {
1023 midin = new AlsaRawMidiIn (i->second.c_str());
1025 midin = new AlsaSeqMidiIn (i->second.c_str());
1028 if (midin->state ()) {
1029 PBD::warning << string_compose (
1030 _("AlsaMidiIn: failed to open midi device '%1'."), i->second)
1034 midin->setup_timing(_samples_per_period, _samplerate);
1035 midin->sync_time (g_get_monotonic_time());
1036 if (midin->start ()) {
1037 PBD::warning << string_compose (
1038 _("AlsaMidiIn: failed to start midi device '%1'."), i->second)
1043 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", ++midi_outs);
1044 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1051 lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : nfo->systemic_input_latency);
1052 set_latency_range (p, false, lr);
1053 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
1054 _rmidi_in.push_back (midin);
1062 AlsaAudioBackend::unregister_ports (bool system_only)
1065 _system_inputs.clear();
1066 _system_outputs.clear();
1067 _system_midi_in.clear();
1068 _system_midi_out.clear();
1069 while (i < _ports.size ()) {
1070 AlsaPort* port = _ports[i];
1071 if (! system_only || (port->is_physical () && port->is_terminal ())) {
1072 port->disconnect_all ();
1074 _ports.erase (_ports.begin() + i);
1082 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
1084 AlsaPort* src_port = find_port (src);
1085 AlsaPort* dst_port = find_port (dst);
1088 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
1089 << " (" << src <<")" << endmsg;
1093 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
1094 << " (" << dst <<")" << endmsg;
1097 return src_port->connect (dst_port);
1101 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
1103 AlsaPort* src_port = find_port (src);
1104 AlsaPort* dst_port = find_port (dst);
1106 if (!src_port || !dst_port) {
1107 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1110 return src_port->disconnect (dst_port);
1114 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1116 AlsaPort* dst_port = find_port (dst);
1117 if (!valid_port (src)) {
1118 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1122 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1123 << " (" << dst << ")" << endmsg;
1126 return static_cast<AlsaPort*>(src)->connect (dst_port);
1130 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1132 AlsaPort* dst_port = find_port (dst);
1133 if (!valid_port (src) || !dst_port) {
1134 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1137 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1141 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1143 if (!valid_port (port)) {
1144 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1147 static_cast<AlsaPort*>(port)->disconnect_all ();
1152 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1154 if (!valid_port (port)) {
1155 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1158 return static_cast<AlsaPort*>(port)->is_connected ();
1162 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1164 AlsaPort* dst_port = find_port (dst);
1165 if (!valid_port (src) || !dst_port) {
1166 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1169 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1173 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1175 if (!valid_port (port)) {
1176 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1179 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1183 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1185 if (!valid_port (port)) {
1186 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1190 assert (0 == names.size ());
1192 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1194 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1195 names.push_back ((*i)->name ());
1198 return (int)names.size ();
1203 AlsaAudioBackend::midi_event_get (
1204 pframes_t& timestamp,
1205 size_t& size, uint8_t** buf, void* port_buffer,
1206 uint32_t event_index)
1208 assert (buf && port_buffer);
1209 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1210 if (event_index >= source.size ()) {
1213 AlsaMidiEvent * const event = source[event_index].get ();
1215 timestamp = event->timestamp ();
1216 size = event->size ();
1217 *buf = event->data ();
1222 AlsaAudioBackend::midi_event_put (
1224 pframes_t timestamp,
1225 const uint8_t* buffer, size_t size)
1227 assert (buffer && port_buffer);
1228 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1229 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1230 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1231 (pframes_t)dst.back ()->timestamp (), timestamp);
1234 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1239 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1241 assert (port_buffer);
1242 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1246 AlsaAudioBackend::midi_clear (void* port_buffer)
1248 assert (port_buffer);
1249 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1257 AlsaAudioBackend::can_monitor_input () const
1263 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1269 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1275 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1280 /* Latency management */
1283 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1285 if (!valid_port (port)) {
1286 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1288 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1292 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1294 if (!valid_port (port)) {
1295 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1301 return static_cast<AlsaPort*>(port)->latency_range (for_playback);
1304 /* Discovering physical ports */
1307 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1309 if (!valid_port (port)) {
1310 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1313 return static_cast<AlsaPort*>(port)->is_physical ();
1317 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1319 for (size_t i = 0; i < _ports.size (); ++i) {
1320 AlsaPort* port = _ports[i];
1321 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1322 port_names.push_back (port->name ());
1328 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1330 for (size_t i = 0; i < _ports.size (); ++i) {
1331 AlsaPort* port = _ports[i];
1332 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1333 port_names.push_back (port->name ());
1339 AlsaAudioBackend::n_physical_outputs () const
1343 for (size_t i = 0; i < _ports.size (); ++i) {
1344 AlsaPort* port = _ports[i];
1345 if (port->is_output () && port->is_physical ()) {
1346 switch (port->type ()) {
1347 case DataType::AUDIO: ++n_audio; break;
1348 case DataType::MIDI: ++n_midi; break;
1354 cc.set (DataType::AUDIO, n_audio);
1355 cc.set (DataType::MIDI, n_midi);
1360 AlsaAudioBackend::n_physical_inputs () const
1364 for (size_t i = 0; i < _ports.size (); ++i) {
1365 AlsaPort* port = _ports[i];
1366 if (port->is_input () && port->is_physical ()) {
1367 switch (port->type ()) {
1368 case DataType::AUDIO: ++n_audio; break;
1369 case DataType::MIDI: ++n_midi; break;
1375 cc.set (DataType::AUDIO, n_audio);
1376 cc.set (DataType::MIDI, n_midi);
1380 /* Getting access to the data buffer for a port */
1383 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1386 assert (valid_port (port));
1387 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1390 /* Engine Process */
1392 AlsaAudioBackend::main_process_thread ()
1394 AudioEngine::thread_init_callback (this);
1396 _processed_samples = 0;
1398 uint64_t clock1, clock2;
1399 _pcmi->pcm_start ();
1400 int no_proc_errors = 0;
1401 const int bailout = 2 * _samplerate / _samples_per_period;
1402 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1404 manager.registration_callback();
1405 manager.graph_order_callback();
1411 if (_freewheeling != _freewheel) {
1412 _freewheel = _freewheeling;
1413 engine.freewheel_callback (_freewheel);
1417 nr = _pcmi->pcm_wait ();
1419 if (_pcmi->state () > 0) {
1423 if (_pcmi->state () < 0) {
1424 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1427 if (no_proc_errors > bailout) {
1430 _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."),
1436 while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) {
1438 clock1 = g_get_monotonic_time();
1441 _pcmi->capt_init (_samples_per_period);
1442 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1443 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1445 _pcmi->capt_done (_samples_per_period);
1447 /* de-queue incoming midi*/
1449 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1450 assert (_rmidi_in.size() > i);
1451 AlsaMidiIn *rm = _rmidi_in.at(i);
1452 void *bptr = (*it)->get_buffer(0);
1454 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1455 size_t size = sizeof(data);
1457 while (rm->recv_event (time, data, size)) {
1458 midi_event_put(bptr, time, data, size);
1459 size = sizeof(data);
1461 rm->sync_time (clock1);
1464 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1465 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1468 if (engine.process_callback (_samples_per_period)) {
1474 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1475 static_cast<AlsaMidiPort*>(*it)->next_period();
1478 /* queue outgoing midi */
1480 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1481 assert (_rmidi_out.size() > i);
1482 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
1483 AlsaMidiOut *rm = _rmidi_out.at(i);
1484 rm->sync_time (clock1);
1485 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1486 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1490 /* write back audio */
1492 _pcmi->play_init (_samples_per_period);
1493 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1494 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1496 for (; i < _pcmi->nplay (); ++i) {
1497 _pcmi->clear_chan (i, _samples_per_period);
1499 _pcmi->play_done (_samples_per_period);
1500 nr -= _samples_per_period;
1501 _processed_samples += _samples_per_period;
1503 /* calculate DSP load */
1504 clock2 = g_get_monotonic_time();
1505 const int64_t elapsed_time = clock2 - clock1;
1506 _dsp_load = elapsed_time / (float) nomial_time;
1509 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1512 fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n",
1513 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1519 // zero audio input buffers
1520 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1521 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1524 clock1 = g_get_monotonic_time();
1526 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1527 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1528 AlsaMidiIn *rm = _rmidi_in.at(i);
1529 void *bptr = (*it)->get_buffer(0);
1530 midi_clear(bptr); // zero midi buffer
1532 // TODO add an API call for this.
1534 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1535 size_t size = sizeof(data);
1536 while (rm->recv_event (time, data, size)) {
1537 ; // discard midi-data from HW.
1539 rm->sync_time (clock1);
1542 if (engine.process_callback (_samples_per_period)) {
1548 // drop all outgoing MIDI messages
1549 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1550 void *bptr = (*it)->get_buffer(0);
1555 Glib::usleep (100); // don't hog cpu
1558 bool connections_changed = false;
1559 bool ports_changed = false;
1560 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1561 if (_port_change_flag) {
1562 ports_changed = true;
1563 _port_change_flag = false;
1565 if (!_port_connection_queue.empty ()) {
1566 connections_changed = true;
1568 while (!_port_connection_queue.empty ()) {
1569 PortConnectData *c = _port_connection_queue.back ();
1570 manager.connect_callback (c->a, c->b, c->c);
1571 _port_connection_queue.pop_back ();
1574 pthread_mutex_unlock (&_port_callback_mutex);
1576 if (ports_changed) {
1577 manager.registration_callback();
1579 if (connections_changed) {
1580 manager.graph_order_callback();
1582 if (connections_changed || ports_changed) {
1583 engine.latency_callback(false);
1584 engine.latency_callback(true);
1591 engine.halted_callback("ALSA I/O error.");
1597 /******************************************************************************/
1599 static boost::shared_ptr<AlsaAudioBackend> _instance;
1601 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1602 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1603 static int deinstantiate ();
1604 static bool already_configured ();
1605 static bool available ();
1607 static ARDOUR::AudioBackendInfo _descriptor = {
1616 static boost::shared_ptr<AudioBackend>
1617 backend_factory (AudioEngine& e)
1620 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1626 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1628 s_instance_name = arg1;
1640 already_configured ()
1651 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1653 return &_descriptor;
1657 /******************************************************************************/
1658 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1663 _capture_latency_range.min = 0;
1664 _capture_latency_range.max = 0;
1665 _playback_latency_range.min = 0;
1666 _playback_latency_range.max = 0;
1669 AlsaPort::~AlsaPort () {
1674 int AlsaPort::connect (AlsaPort *port)
1677 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1681 if (type () != port->type ()) {
1682 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
1686 if (is_output () && port->is_output ()) {
1687 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
1691 if (is_input () && port->is_input ()) {
1692 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
1697 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
1701 if (is_connected (port)) {
1702 #if 0 // don't bother to warn about this for now. just ignore it
1703 PBD::error << _("AlsaPort::connect (): ports are already connected:")
1704 << " (" << name () << ") -> (" << port->name () << ")"
1710 _connect (port, true);
1715 void AlsaPort::_connect (AlsaPort *port, bool callback)
1717 _connections.push_back (port);
1719 port->_connect (this, false);
1720 _alsa_backend.port_connect_callback (name(), port->name(), true);
1724 int AlsaPort::disconnect (AlsaPort *port)
1727 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
1731 if (!is_connected (port)) {
1732 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
1733 << " (" << name () << ") -> (" << port->name () << ")"
1737 _disconnect (port, true);
1741 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
1743 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1745 assert (it != _connections.end ());
1747 _connections.erase (it);
1750 port->_disconnect (this, false);
1751 _alsa_backend.port_connect_callback (name(), port->name(), false);
1756 void AlsaPort::disconnect_all ()
1758 while (!_connections.empty ()) {
1759 _connections.back ()->_disconnect (this, false);
1760 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1761 _connections.pop_back ();
1766 AlsaPort::is_connected (const AlsaPort *port) const
1768 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1771 bool AlsaPort::is_physically_connected () const
1773 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1774 if ((*it)->is_physical ()) {
1781 /******************************************************************************/
1783 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1784 : AlsaPort (b, name, flags)
1786 memset (_buffer, 0, sizeof (_buffer));
1787 mlock(_buffer, sizeof (_buffer));
1790 AlsaAudioPort::~AlsaAudioPort () { }
1792 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
1795 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
1796 if (it == get_connections ().end ()) {
1797 memset (_buffer, 0, n_samples * sizeof (Sample));
1799 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
1800 assert (source && source->is_output ());
1801 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1802 while (++it != get_connections ().end ()) {
1803 source = static_cast<const AlsaAudioPort*>(*it);
1804 assert (source && source->is_output ());
1805 Sample* dst = buffer ();
1806 const Sample* src = source->const_buffer ();
1807 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1817 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1818 : AlsaPort (b, name, flags)
1822 _buffer[0].clear ();
1823 _buffer[1].clear ();
1826 AlsaMidiPort::~AlsaMidiPort () { }
1828 struct MidiEventSorter {
1829 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
1834 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
1837 (_buffer[_bufperiod]).clear ();
1838 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
1839 i != get_connections ().end ();
1841 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
1842 for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1843 (_buffer[_bufperiod]).push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
1846 std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
1848 return &(_buffer[_bufperiod]);
1851 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1853 , _timestamp (timestamp)
1857 _data = (uint8_t*) malloc (size);
1858 memcpy (_data, data, size);
1862 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
1863 : _size (other.size ())
1864 , _timestamp (other.timestamp ())
1867 if (other.size () && other.const_data ()) {
1868 _data = (uint8_t*) malloc (other.size ());
1869 memcpy (_data, other.const_data (), other.size ());
1873 AlsaMidiEvent::~AlsaMidiEvent () {