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::_input_audio_device_status;
43 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_output_audio_device_status;
44 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_duplex_audio_device_status;
45 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_midi_device_status;
47 AlsaAudioBackend::AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info)
48 : AudioBackend (e, info)
53 , _freewheeling (false)
54 , _measure_latency (false)
55 , _last_process_start (0)
56 , _input_audio_device("")
57 , _output_audio_device("")
58 , _midi_driver_option(_("None"))
59 , _device_reservation(0)
61 , _samples_per_period (1024)
62 , _periods_per_cycle (2)
65 , _systemic_audio_input_latency (0)
66 , _systemic_audio_output_latency (0)
68 , _processed_samples (0)
69 , _port_change_flag (false)
71 _instance_name = s_instance_name;
72 pthread_mutex_init (&_port_callback_mutex, 0);
75 AlsaAudioBackend::~AlsaAudioBackend ()
77 pthread_mutex_destroy (&_port_callback_mutex);
80 /* AUDIOBACKEND API */
83 AlsaAudioBackend::name () const
89 AlsaAudioBackend::is_realtime () const
94 std::vector<AudioBackend::DeviceStatus>
95 AlsaAudioBackend::enumerate_devices () const
97 _duplex_audio_device_status.clear();
98 std::map<std::string, std::string> devices;
99 get_alsa_audio_device_names(devices);
100 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
101 if (_input_audio_device == "") _input_audio_device = i->first;
102 if (_output_audio_device == "") _output_audio_device = i->first;
103 _duplex_audio_device_status.push_back (DeviceStatus (i->first, true));
105 return _duplex_audio_device_status;
108 std::vector<AudioBackend::DeviceStatus>
109 AlsaAudioBackend::enumerate_input_devices () const
111 _input_audio_device_status.clear();
112 std::map<std::string, std::string> devices;
113 get_alsa_audio_device_names(devices, HalfDuplexIn);
114 _input_audio_device_status.push_back (DeviceStatus (_("None"), true));
115 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
116 if (_input_audio_device == "") _input_audio_device = i->first;
117 _input_audio_device_status.push_back (DeviceStatus (i->first, true));
119 return _input_audio_device_status;
122 std::vector<AudioBackend::DeviceStatus>
123 AlsaAudioBackend::enumerate_output_devices () const
125 _output_audio_device_status.clear();
126 std::map<std::string, std::string> devices;
127 get_alsa_audio_device_names(devices, HalfDuplexOut);
128 _output_audio_device_status.push_back (DeviceStatus (_("None"), true));
129 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
130 if (_output_audio_device == "") _output_audio_device = i->first;
131 _output_audio_device_status.push_back (DeviceStatus (i->first, true));
133 return _output_audio_device_status;
137 AlsaAudioBackend::reservation_stdout (std::string d, size_t /* s */)
139 if (d.substr(0, 19) == "Acquired audio-card") {
140 _reservation_succeeded = true;
145 AlsaAudioBackend::release_device()
147 _reservation_connection.drop_connections();
148 ARDOUR::SystemExec * tmp = _device_reservation;
149 _device_reservation = 0;
154 AlsaAudioBackend::acquire_device(const char* device_name)
156 /* This is quick hack, ideally we'll link against libdbus and implement a dbus-listener
157 * that owns the device. here we try to get away by just requesting it and then block it...
158 * (pulseaudio periodically checks anyway)
160 * dbus-send --session --print-reply --type=method_call --dest=org.freedesktop.ReserveDevice1.Audio2 /org/freedesktop/ReserveDevice1/Audio2 org.freedesktop.ReserveDevice1.RequestRelease int32:4
161 * -> should not return 'boolean false'
163 int device_number = card_to_num(device_name);
164 if (device_number < 0) return false;
166 assert(_device_reservation == 0);
167 _reservation_succeeded = false;
169 std::string request_device_exe;
170 if (!PBD::find_file (
171 PBD::Searchpath(Glib::build_filename(ARDOUR::ardour_dll_directory(), "ardouralsautil")
172 + G_SEARCHPATH_SEPARATOR_S + ARDOUR::ardour_dll_directory()),
173 "ardour-request-device", request_device_exe))
175 PBD::warning << "ardour-request-device binary was not found..'" << endmsg;
182 argp=(char**) calloc(5,sizeof(char*));
183 argp[0] = strdup(request_device_exe.c_str());
184 argp[1] = strdup("-P");
185 snprintf(tmp, sizeof(tmp), "%d", getpid());
186 argp[2] = strdup(tmp);
187 snprintf(tmp, sizeof(tmp), "Audio%d", device_number);
188 argp[3] = strdup(tmp);
191 _device_reservation = new ARDOUR::SystemExec(request_device_exe, argp);
192 _device_reservation->ReadStdout.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::reservation_stdout, this, _1 ,_2));
193 _device_reservation->Terminated.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::release_device, this));
194 if (_device_reservation->start(0)) {
195 PBD::warning << _("AlsaAudioBackend: Device Request failed.") << endmsg;
200 // wait to check if reservation suceeded.
201 int timeout = 500; // 5 sec
202 while (_device_reservation && !_reservation_succeeded && --timeout > 0) {
205 if (timeout == 0 || !_reservation_succeeded) {
206 PBD::warning << _("AlsaAudioBackend: Device Reservation failed.") << endmsg;
214 AlsaAudioBackend::available_sample_rates (const std::string&) const
216 std::vector<float> sr;
217 sr.push_back (8000.0);
218 sr.push_back (22050.0);
219 sr.push_back (24000.0);
220 sr.push_back (44100.0);
221 sr.push_back (48000.0);
222 sr.push_back (88200.0);
223 sr.push_back (96000.0);
224 sr.push_back (176400.0);
225 sr.push_back (192000.0);
229 std::vector<uint32_t>
230 AlsaAudioBackend::available_buffer_sizes (const std::string&) const
232 std::vector<uint32_t> bs;
246 AlsaAudioBackend::available_input_channel_count (const std::string&) const
248 return 128; // TODO query current device
252 AlsaAudioBackend::available_output_channel_count (const std::string&) const
254 return 128; // TODO query current device
258 AlsaAudioBackend::can_change_sample_rate_when_running () const
264 AlsaAudioBackend::can_change_buffer_size_when_running () const
266 return false; // why not? :)
270 AlsaAudioBackend::set_input_device_name (const std::string& d)
272 _input_audio_device = d;
277 AlsaAudioBackend::set_output_device_name (const std::string& d)
279 _output_audio_device = d;
284 AlsaAudioBackend::set_device_name (const std::string& d)
287 rv |= set_input_device_name (d);
288 rv |= set_output_device_name (d);
293 AlsaAudioBackend::set_sample_rate (float sr)
295 if (sr <= 0) { return -1; }
297 engine.sample_rate_change (sr);
302 AlsaAudioBackend::set_buffer_size (uint32_t bs)
304 if (bs <= 0 || bs >= _max_buffer_size) {
310 _samples_per_period = bs;
311 engine.buffer_size_change (bs);
316 AlsaAudioBackend::set_interleaved (bool yn)
318 if (!yn) { return 0; }
323 AlsaAudioBackend::set_input_channels (uint32_t cc)
330 AlsaAudioBackend::set_output_channels (uint32_t cc)
337 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
339 _systemic_audio_input_latency = sl;
344 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
346 _systemic_audio_output_latency = sl;
351 AlsaAudioBackend::set_systemic_midi_input_latency (std::string const device, uint32_t sl)
353 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
355 nfo->systemic_input_latency = sl;
360 AlsaAudioBackend::set_systemic_midi_output_latency (std::string const device, uint32_t sl)
362 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
364 nfo->systemic_output_latency = sl;
368 /* Retrieving parameters */
370 AlsaAudioBackend::device_name () const
372 if (_input_audio_device != _("None")) {
373 return _input_audio_device;
375 if (_output_audio_device != _("None")) {
376 return _output_audio_device;
382 AlsaAudioBackend::input_device_name () const
384 return _input_audio_device;
388 AlsaAudioBackend::output_device_name () const
390 return _output_audio_device;
394 AlsaAudioBackend::sample_rate () const
400 AlsaAudioBackend::buffer_size () const
402 return _samples_per_period;
406 AlsaAudioBackend::interleaved () const
412 AlsaAudioBackend::input_channels () const
418 AlsaAudioBackend::output_channels () const
424 AlsaAudioBackend::systemic_input_latency () const
426 return _systemic_audio_input_latency;
430 AlsaAudioBackend::systemic_output_latency () const
432 return _systemic_audio_output_latency;
436 AlsaAudioBackend::systemic_midi_input_latency (std::string const device) const
438 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
440 return nfo->systemic_input_latency;
444 AlsaAudioBackend::systemic_midi_output_latency (std::string const device) const
446 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
448 return nfo->systemic_output_latency;
452 struct AlsaAudioBackend::AlsaMidiDeviceInfo *
453 AlsaAudioBackend::midi_device_info(std::string const name) const {
454 for (std::map<std::string, struct AlsaMidiDeviceInfo*>::const_iterator i = _midi_devices.begin (); i != _midi_devices.end(); ++i) {
455 if (i->first == name) {
460 assert(_midi_driver_option != _("None"));
462 std::map<std::string, std::string> devices;
463 if (_midi_driver_option == _("ALSA raw devices")) {
464 get_alsa_rawmidi_device_names(devices);
466 get_alsa_sequencer_names (devices);
469 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
470 if (i->first == name) {
471 _midi_devices[name] = new AlsaMidiDeviceInfo();
472 return _midi_devices[name];
478 std::vector<std::string>
479 AlsaAudioBackend::enumerate_midi_options () const
481 if (_midi_options.empty()) {
482 _midi_options.push_back (_("ALSA raw devices"));
483 _midi_options.push_back (_("ALSA sequencer"));
484 _midi_options.push_back (_("None"));
486 return _midi_options;
489 std::vector<AudioBackend::DeviceStatus>
490 AlsaAudioBackend::enumerate_midi_devices () const
492 _midi_device_status.clear();
493 std::map<std::string, std::string> devices;
495 if (_midi_driver_option == _("ALSA raw devices")) {
496 get_alsa_rawmidi_device_names (devices);
498 else if (_midi_driver_option == _("ALSA sequencer")) {
499 get_alsa_sequencer_names (devices);
502 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
503 _midi_device_status.push_back (DeviceStatus (i->first, true));
505 return _midi_device_status;
509 AlsaAudioBackend::set_midi_option (const std::string& opt)
511 if (opt != _("None") && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
514 _midi_driver_option = opt;
519 AlsaAudioBackend::midi_option () const
521 return _midi_driver_option;
525 AlsaAudioBackend::set_midi_device_enabled (std::string const device, bool enable)
527 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
529 nfo->enabled = enable;
534 AlsaAudioBackend::midi_device_enabled (std::string const device) const
536 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
537 if (!nfo) return false;
543 static void * pthread_process (void *arg)
545 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
546 d->main_process_thread ();
552 AlsaAudioBackend::_start (bool for_latency_measurement)
554 if (!_active && _run) {
555 // recover from 'halted', reap threads
559 if (_active || _run) {
560 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
565 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
566 _system_inputs.clear();
567 _system_outputs.clear();
568 _system_midi_in.clear();
569 _system_midi_out.clear();
573 /* reset internal state */
575 _freewheeling = false;
577 _last_process_start = 0;
581 assert(_rmidi_in.size() == 0);
582 assert(_rmidi_out.size() == 0);
586 std::string audio_device;
587 std::string alsa_device;
588 std::map<std::string, std::string> devices;
590 if (_input_audio_device == _("None") && _output_audio_device == _("None")) {
591 PBD::error << _("AlsaAudioBackend: At least one of input or output device needs to be set.");
595 if (_input_audio_device != _output_audio_device) {
596 if (_input_audio_device != _("None") && _output_audio_device != _("None")) {
597 PBD::error << _("AlsaAudioBackend: Cannot use two different devices.");
600 if (_input_audio_device != _("None")) {
601 get_alsa_audio_device_names(devices, HalfDuplexIn);
602 audio_device = _input_audio_device;
605 get_alsa_audio_device_names(devices, HalfDuplexOut);
606 audio_device = _output_audio_device;
610 get_alsa_audio_device_names(devices);
611 audio_device = _input_audio_device;
615 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
616 if (i->first == audio_device) {
617 alsa_device = i->second;
621 if (alsa_device == "") {
622 PBD::error << _("AlsaAudioBackend: Cannot find configured device. Is it still connected?");
626 acquire_device(alsa_device.c_str());
627 _pcmi = new Alsa_pcmi (
628 (duplex & 2) ? alsa_device.c_str() : NULL,
629 (duplex & 1) ? alsa_device.c_str() : NULL,
630 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
631 switch (_pcmi->state ()) {
632 case 0: /* OK */ break;
633 case -1: PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg; break;
634 case -2: PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg; break;
635 case -3: PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.") << endmsg; break;
636 case -4: PBD::error << _("AlsaAudioBackend: cannot set requested period size.") << endmsg; break;
637 case -5: PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.") << endmsg; break;
638 case -6: PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg; break;
639 default: PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg; break;
641 if (_pcmi->state ()) {
642 delete _pcmi; _pcmi = 0;
651 if (_n_outputs != _pcmi->nplay ()) {
652 if (_n_outputs == 0) {
653 _n_outputs = _pcmi->nplay ();
655 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
657 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
660 if (_n_inputs != _pcmi->ncapt ()) {
661 if (_n_inputs == 0) {
662 _n_inputs = _pcmi->ncapt ();
664 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
666 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
669 if (_pcmi->fsize() != _samples_per_period) {
670 _samples_per_period = _pcmi->fsize();
671 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
674 if (_pcmi->fsamp() != _samplerate) {
675 _samplerate = _pcmi->fsamp();
676 engine.sample_rate_change (_samplerate);
677 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
680 _measure_latency = for_latency_measurement;
682 register_system_midi_ports();
684 if (register_system_audio_ports()) {
685 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
686 delete _pcmi; _pcmi = 0;
691 engine.sample_rate_change (_samplerate);
692 engine.buffer_size_change (_samples_per_period);
694 if (engine.reestablish_ports ()) {
695 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
696 delete _pcmi; _pcmi = 0;
701 engine.reconnect_ports ();
703 _port_change_flag = false;
705 if (_realtime_pthread_create (SCHED_FIFO, -20, 100000,
706 &_main_thread, pthread_process, this))
708 if (pthread_create (&_main_thread, NULL, pthread_process, this))
710 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
711 delete _pcmi; _pcmi = 0;
716 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
721 while (!_active && --timeout > 0) { Glib::usleep (1000); }
723 if (timeout == 0 || !_active) {
724 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
725 delete _pcmi; _pcmi = 0;
735 AlsaAudioBackend::stop ()
743 if (pthread_join (_main_thread, &status)) {
744 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
748 while (!_rmidi_out.empty ()) {
749 AlsaMidiIO *m = _rmidi_out.back ();
751 _rmidi_out.pop_back ();
754 while (!_rmidi_in.empty ()) {
755 AlsaMidiIO *m = _rmidi_in.back ();
757 _rmidi_in.pop_back ();
762 delete _pcmi; _pcmi = 0;
765 return (_active == false) ? 0 : -1;
769 AlsaAudioBackend::freewheel (bool onoff)
771 _freewheeling = onoff;
776 AlsaAudioBackend::dsp_load () const
778 return std::min(100.f, 100.f * _dsp_load);
782 AlsaAudioBackend::raw_buffer_size (DataType t)
785 case DataType::AUDIO:
786 return _samples_per_period * sizeof(Sample);
788 return _max_buffer_size; // XXX not really limited
795 AlsaAudioBackend::sample_time ()
797 return _processed_samples;
801 AlsaAudioBackend::sample_time_at_cycle_start ()
803 return _processed_samples;
807 AlsaAudioBackend::samples_since_cycle_start ()
809 if (!_active || !_run || _freewheeling || _freewheel) {
812 if (_last_process_start == 0) {
816 const int64_t elapsed_time_us = g_get_monotonic_time() - _last_process_start;
817 return std::max((pframes_t)0, (pframes_t)rint(1e-6 * elapsed_time_us * _samplerate));
822 AlsaAudioBackend::alsa_process_thread (void *arg)
824 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
825 boost::function<void ()> f = td->f;
832 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
836 size_t stacksize = 100000;
838 ThreadData* td = new ThreadData (this, func, stacksize);
840 if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
841 &thread_id, alsa_process_thread, td)) {
842 pthread_attr_init (&attr);
843 pthread_attr_setstacksize (&attr, stacksize);
844 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
845 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
846 pthread_attr_destroy (&attr);
849 pthread_attr_destroy (&attr);
852 _threads.push_back (thread_id);
857 AlsaAudioBackend::join_process_threads ()
861 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
864 if (pthread_join (*i, &status)) {
865 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
874 AlsaAudioBackend::in_process_thread ()
876 if (pthread_equal (_main_thread, pthread_self()) != 0) {
880 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
882 if (pthread_equal (*i, pthread_self ()) != 0) {
890 AlsaAudioBackend::process_thread_count ()
892 return _threads.size ();
896 AlsaAudioBackend::update_latencies ()
898 // trigger latency callback in RT thread (locked graph)
899 port_connect_add_remove_callback();
905 AlsaAudioBackend::private_handle () const
911 AlsaAudioBackend::my_name () const
913 return _instance_name;
917 AlsaAudioBackend::available () const
919 return _run && _active;
923 AlsaAudioBackend::port_name_size () const
929 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
931 if (!valid_port (port)) {
932 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
935 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
939 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
941 if (!valid_port (port)) {
942 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
943 return std::string ();
945 return static_cast<AlsaPort*>(port)->name ();
948 PortEngine::PortHandle
949 AlsaAudioBackend::get_port_by_name (const std::string& name) const
951 PortHandle port = (PortHandle) find_port (name);
956 AlsaAudioBackend::get_ports (
957 const std::string& port_name_pattern,
958 DataType type, PortFlags flags,
959 std::vector<std::string>& port_names) const
963 bool use_regexp = false;
964 if (port_name_pattern.size () > 0) {
965 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
969 for (size_t i = 0; i < _ports.size (); ++i) {
970 AlsaPort* port = _ports[i];
971 if ((port->type () == type) && flags == (port->flags () & flags)) {
972 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
973 port_names.push_back (port->name ());
979 regfree (&port_regex);
985 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
987 if (!valid_port (port)) {
988 return DataType::NIL;
990 return static_cast<AlsaPort*>(port)->type ();
993 PortEngine::PortHandle
994 AlsaAudioBackend::register_port (
995 const std::string& name,
996 ARDOUR::DataType type,
997 ARDOUR::PortFlags flags)
999 if (name.size () == 0) { return 0; }
1000 if (flags & IsPhysical) { return 0; }
1001 return add_port (_instance_name + ":" + name, type, flags);
1004 PortEngine::PortHandle
1005 AlsaAudioBackend::add_port (
1006 const std::string& name,
1007 ARDOUR::DataType type,
1008 ARDOUR::PortFlags flags)
1010 assert(name.size ());
1011 if (find_port (name)) {
1012 PBD::error << _("AlsaBackend::register_port: Port already exists:")
1013 << " (" << name << ")" << endmsg;
1016 AlsaPort* port = NULL;
1018 case DataType::AUDIO:
1019 port = new AlsaAudioPort (*this, name, flags);
1021 case DataType::MIDI:
1022 port = new AlsaMidiPort (*this, name, flags);
1025 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
1029 _ports.push_back (port);
1035 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
1040 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
1041 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
1042 if (i == _ports.end ()) {
1043 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
1046 disconnect_all(port_handle);
1052 AlsaAudioBackend::register_system_audio_ports()
1056 const int a_ins = _n_inputs;
1057 const int a_out = _n_outputs;
1060 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_input_latency);
1061 for (int i = 1; i <= a_ins; ++i) {
1063 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
1064 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1066 set_latency_range (p, false, lr);
1067 _system_inputs.push_back(static_cast<AlsaPort*>(p));
1070 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_output_latency);
1071 for (int i = 1; i <= a_out; ++i) {
1073 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
1074 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1076 set_latency_range (p, true, lr);
1077 _system_outputs.push_back(static_cast<AlsaPort*>(p));
1083 AlsaAudioBackend::register_system_midi_ports()
1085 std::map<std::string, std::string> devices;
1089 if (_midi_driver_option == _("None")) {
1091 } else if (_midi_driver_option == _("ALSA raw devices")) {
1092 get_alsa_rawmidi_device_names(devices);
1094 get_alsa_sequencer_names (devices);
1097 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
1098 struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first);
1100 if (!nfo->enabled) continue;
1103 if (_midi_driver_option == _("ALSA raw devices")) {
1104 mout = new AlsaRawMidiOut (i->second.c_str());
1106 mout = new AlsaSeqMidiOut (i->second.c_str());
1109 if (mout->state ()) {
1110 PBD::warning << string_compose (
1111 _("AlsaMidiOut: failed to open midi device '%1'."), i->second)
1115 mout->setup_timing(_samples_per_period, _samplerate);
1116 mout->sync_time (g_get_monotonic_time());
1117 if (mout->start ()) {
1118 PBD::warning << string_compose (
1119 _("AlsaMidiOut: failed to start midi device '%1'."), i->second)
1124 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", ++midi_ins);
1125 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1131 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
1132 set_latency_range (p, false, lr);
1133 static_cast<AlsaMidiPort*>(p)->set_n_periods(2);
1134 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
1135 _rmidi_out.push_back (mout);
1140 if (_midi_driver_option == _("ALSA raw devices")) {
1141 midin = new AlsaRawMidiIn (i->second.c_str());
1143 midin = new AlsaSeqMidiIn (i->second.c_str());
1146 if (midin->state ()) {
1147 PBD::warning << string_compose (
1148 _("AlsaMidiIn: failed to open midi device '%1'."), i->second)
1152 midin->setup_timing(_samples_per_period, _samplerate);
1153 midin->sync_time (g_get_monotonic_time());
1154 if (midin->start ()) {
1155 PBD::warning << string_compose (
1156 _("AlsaMidiIn: failed to start midi device '%1'."), i->second)
1161 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", ++midi_outs);
1162 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1169 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
1170 set_latency_range (p, false, lr);
1171 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
1172 _rmidi_in.push_back (midin);
1180 AlsaAudioBackend::unregister_ports (bool system_only)
1183 _system_inputs.clear();
1184 _system_outputs.clear();
1185 _system_midi_in.clear();
1186 _system_midi_out.clear();
1187 while (i < _ports.size ()) {
1188 AlsaPort* port = _ports[i];
1189 if (! system_only || (port->is_physical () && port->is_terminal ())) {
1190 port->disconnect_all ();
1192 _ports.erase (_ports.begin() + i);
1200 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
1202 AlsaPort* src_port = find_port (src);
1203 AlsaPort* dst_port = find_port (dst);
1206 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
1207 << " (" << src <<")" << endmsg;
1211 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
1212 << " (" << dst <<")" << endmsg;
1215 return src_port->connect (dst_port);
1219 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
1221 AlsaPort* src_port = find_port (src);
1222 AlsaPort* dst_port = find_port (dst);
1224 if (!src_port || !dst_port) {
1225 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1228 return src_port->disconnect (dst_port);
1232 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1234 AlsaPort* dst_port = find_port (dst);
1235 if (!valid_port (src)) {
1236 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1240 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1241 << " (" << dst << ")" << endmsg;
1244 return static_cast<AlsaPort*>(src)->connect (dst_port);
1248 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1250 AlsaPort* dst_port = find_port (dst);
1251 if (!valid_port (src) || !dst_port) {
1252 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1255 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1259 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1261 if (!valid_port (port)) {
1262 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1265 static_cast<AlsaPort*>(port)->disconnect_all ();
1270 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1272 if (!valid_port (port)) {
1273 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1276 return static_cast<AlsaPort*>(port)->is_connected ();
1280 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1282 AlsaPort* dst_port = find_port (dst);
1283 if (!valid_port (src) || !dst_port) {
1284 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1287 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1291 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1293 if (!valid_port (port)) {
1294 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1297 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1301 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1303 if (!valid_port (port)) {
1304 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1308 assert (0 == names.size ());
1310 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1312 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1313 names.push_back ((*i)->name ());
1316 return (int)names.size ();
1321 AlsaAudioBackend::midi_event_get (
1322 pframes_t& timestamp,
1323 size_t& size, uint8_t** buf, void* port_buffer,
1324 uint32_t event_index)
1326 assert (buf && port_buffer);
1327 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1328 if (event_index >= source.size ()) {
1331 AlsaMidiEvent * const event = source[event_index].get ();
1333 timestamp = event->timestamp ();
1334 size = event->size ();
1335 *buf = event->data ();
1340 AlsaAudioBackend::midi_event_put (
1342 pframes_t timestamp,
1343 const uint8_t* buffer, size_t size)
1345 assert (buffer && port_buffer);
1346 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1347 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1349 // nevermind, ::get_buffer() sorts events
1350 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1351 (pframes_t)dst.back ()->timestamp (), timestamp);
1354 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1359 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1361 assert (port_buffer);
1362 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1366 AlsaAudioBackend::midi_clear (void* port_buffer)
1368 assert (port_buffer);
1369 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1377 AlsaAudioBackend::can_monitor_input () const
1383 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1389 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1395 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1400 /* Latency management */
1403 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1405 if (!valid_port (port)) {
1406 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1408 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1412 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1415 if (!valid_port (port)) {
1416 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1421 AlsaPort *p = static_cast<AlsaPort*>(port);
1424 r = p->latency_range (for_playback);
1425 if (p->is_physical() && p->is_terminal()) {
1426 if (p->is_input() && for_playback) {
1427 r.min += _samples_per_period;
1428 r.max += _samples_per_period;
1430 if (p->is_output() && !for_playback) {
1431 r.min += _samples_per_period;
1432 r.max += _samples_per_period;
1438 /* Discovering physical ports */
1441 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1443 if (!valid_port (port)) {
1444 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1447 return static_cast<AlsaPort*>(port)->is_physical ();
1451 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1453 for (size_t i = 0; i < _ports.size (); ++i) {
1454 AlsaPort* port = _ports[i];
1455 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1456 port_names.push_back (port->name ());
1462 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1464 for (size_t i = 0; i < _ports.size (); ++i) {
1465 AlsaPort* port = _ports[i];
1466 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1467 port_names.push_back (port->name ());
1473 AlsaAudioBackend::n_physical_outputs () const
1477 for (size_t i = 0; i < _ports.size (); ++i) {
1478 AlsaPort* port = _ports[i];
1479 if (port->is_output () && port->is_physical ()) {
1480 switch (port->type ()) {
1481 case DataType::AUDIO: ++n_audio; break;
1482 case DataType::MIDI: ++n_midi; break;
1488 cc.set (DataType::AUDIO, n_audio);
1489 cc.set (DataType::MIDI, n_midi);
1494 AlsaAudioBackend::n_physical_inputs () const
1498 for (size_t i = 0; i < _ports.size (); ++i) {
1499 AlsaPort* port = _ports[i];
1500 if (port->is_input () && port->is_physical ()) {
1501 switch (port->type ()) {
1502 case DataType::AUDIO: ++n_audio; break;
1503 case DataType::MIDI: ++n_midi; break;
1509 cc.set (DataType::AUDIO, n_audio);
1510 cc.set (DataType::MIDI, n_midi);
1514 /* Getting access to the data buffer for a port */
1517 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1520 assert (valid_port (port));
1521 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1524 /* Engine Process */
1526 AlsaAudioBackend::main_process_thread ()
1528 AudioEngine::thread_init_callback (this);
1530 _processed_samples = 0;
1532 uint64_t clock1, clock2;
1533 _pcmi->pcm_start ();
1534 int no_proc_errors = 0;
1535 const int bailout = 2 * _samplerate / _samples_per_period;
1536 const int64_t nominal_time = 1e6 * _samples_per_period / _samplerate;
1538 manager.registration_callback();
1539 manager.graph_order_callback();
1545 if (_freewheeling != _freewheel) {
1546 _freewheel = _freewheeling;
1547 engine.freewheel_callback (_freewheel);
1551 nr = _pcmi->pcm_wait ();
1553 if (_pcmi->state () > 0) {
1557 if (_pcmi->state () < 0) {
1558 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1561 if (no_proc_errors > bailout) {
1564 _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."),
1570 while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) {
1572 clock1 = g_get_monotonic_time();
1575 _pcmi->capt_init (_samples_per_period);
1576 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1577 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1579 _pcmi->capt_done (_samples_per_period);
1581 /* de-queue incoming midi*/
1583 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1584 assert (_rmidi_in.size() > i);
1585 AlsaMidiIn *rm = _rmidi_in.at(i);
1586 void *bptr = (*it)->get_buffer(0);
1588 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1589 size_t size = sizeof(data);
1591 while (rm->recv_event (time, data, size)) {
1592 midi_event_put(bptr, time, data, size);
1593 size = sizeof(data);
1595 rm->sync_time (clock1);
1598 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1599 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1602 /* call engine process callback */
1603 _last_process_start = g_get_monotonic_time();
1604 if (engine.process_callback (_samples_per_period)) {
1610 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1611 static_cast<AlsaMidiPort*>(*it)->next_period();
1614 /* queue outgoing midi */
1616 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1617 assert (_rmidi_out.size() > i);
1618 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
1619 AlsaMidiOut *rm = _rmidi_out.at(i);
1620 rm->sync_time (clock1);
1621 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1622 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1626 /* write back audio */
1628 _pcmi->play_init (_samples_per_period);
1629 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1630 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1632 for (; i < _pcmi->nplay (); ++i) {
1633 _pcmi->clear_chan (i, _samples_per_period);
1635 _pcmi->play_done (_samples_per_period);
1636 nr -= _samples_per_period;
1637 _processed_samples += _samples_per_period;
1639 /* calculate DSP load */
1640 clock2 = g_get_monotonic_time();
1641 const int64_t elapsed_time = clock2 - clock1;
1643 const float load = elapsed_time / (float) nominal_time;
1644 if (load > _dsp_load) {
1647 const float a = .2 * _samples_per_period / _samplerate;
1648 _dsp_load = _dsp_load + a * (load - _dsp_load) + 1e-12;
1652 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1655 fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n",
1656 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1662 // zero audio input buffers
1663 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1664 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1667 clock1 = g_get_monotonic_time();
1669 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1670 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1671 AlsaMidiIn *rm = _rmidi_in.at(i);
1672 void *bptr = (*it)->get_buffer(0);
1673 midi_clear(bptr); // zero midi buffer
1675 // TODO add an API call for this.
1677 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1678 size_t size = sizeof(data);
1679 while (rm->recv_event (time, data, size)) {
1680 ; // discard midi-data from HW.
1682 rm->sync_time (clock1);
1685 _last_process_start = 0;
1686 if (engine.process_callback (_samples_per_period)) {
1692 // drop all outgoing MIDI messages
1693 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1694 void *bptr = (*it)->get_buffer(0);
1699 Glib::usleep (100); // don't hog cpu
1702 bool connections_changed = false;
1703 bool ports_changed = false;
1704 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1705 if (_port_change_flag) {
1706 ports_changed = true;
1707 _port_change_flag = false;
1709 if (!_port_connection_queue.empty ()) {
1710 connections_changed = true;
1712 while (!_port_connection_queue.empty ()) {
1713 PortConnectData *c = _port_connection_queue.back ();
1714 manager.connect_callback (c->a, c->b, c->c);
1715 _port_connection_queue.pop_back ();
1718 pthread_mutex_unlock (&_port_callback_mutex);
1720 if (ports_changed) {
1721 manager.registration_callback();
1723 if (connections_changed) {
1724 manager.graph_order_callback();
1726 if (connections_changed || ports_changed) {
1727 engine.latency_callback(false);
1728 engine.latency_callback(true);
1735 engine.halted_callback("ALSA I/O error.");
1741 /******************************************************************************/
1743 static boost::shared_ptr<AlsaAudioBackend> _instance;
1745 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1746 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1747 static int deinstantiate ();
1748 static bool already_configured ();
1749 static bool available ();
1751 static ARDOUR::AudioBackendInfo _descriptor = {
1760 static boost::shared_ptr<AudioBackend>
1761 backend_factory (AudioEngine& e)
1764 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1770 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1772 s_instance_name = arg1;
1784 already_configured ()
1795 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1797 return &_descriptor;
1801 /******************************************************************************/
1802 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1807 _capture_latency_range.min = 0;
1808 _capture_latency_range.max = 0;
1809 _playback_latency_range.min = 0;
1810 _playback_latency_range.max = 0;
1813 AlsaPort::~AlsaPort () {
1818 int AlsaPort::connect (AlsaPort *port)
1821 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1825 if (type () != port->type ()) {
1826 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
1830 if (is_output () && port->is_output ()) {
1831 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
1835 if (is_input () && port->is_input ()) {
1836 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
1841 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
1845 if (is_connected (port)) {
1846 #if 0 // don't bother to warn about this for now. just ignore it
1847 PBD::error << _("AlsaPort::connect (): ports are already connected:")
1848 << " (" << name () << ") -> (" << port->name () << ")"
1854 _connect (port, true);
1859 void AlsaPort::_connect (AlsaPort *port, bool callback)
1861 _connections.push_back (port);
1863 port->_connect (this, false);
1864 _alsa_backend.port_connect_callback (name(), port->name(), true);
1868 int AlsaPort::disconnect (AlsaPort *port)
1871 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
1875 if (!is_connected (port)) {
1876 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
1877 << " (" << name () << ") -> (" << port->name () << ")"
1881 _disconnect (port, true);
1885 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
1887 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1889 assert (it != _connections.end ());
1891 _connections.erase (it);
1894 port->_disconnect (this, false);
1895 _alsa_backend.port_connect_callback (name(), port->name(), false);
1900 void AlsaPort::disconnect_all ()
1902 while (!_connections.empty ()) {
1903 _connections.back ()->_disconnect (this, false);
1904 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1905 _connections.pop_back ();
1910 AlsaPort::is_connected (const AlsaPort *port) const
1912 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1915 bool AlsaPort::is_physically_connected () const
1917 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1918 if ((*it)->is_physical ()) {
1925 /******************************************************************************/
1927 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1928 : AlsaPort (b, name, flags)
1930 memset (_buffer, 0, sizeof (_buffer));
1931 mlock(_buffer, sizeof (_buffer));
1934 AlsaAudioPort::~AlsaAudioPort () { }
1936 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
1939 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
1940 if (it == get_connections ().end ()) {
1941 memset (_buffer, 0, n_samples * sizeof (Sample));
1943 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
1944 assert (source && source->is_output ());
1945 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1946 while (++it != get_connections ().end ()) {
1947 source = static_cast<const AlsaAudioPort*>(*it);
1948 assert (source && source->is_output ());
1949 Sample* dst = buffer ();
1950 const Sample* src = source->const_buffer ();
1951 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1961 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1962 : AlsaPort (b, name, flags)
1966 _buffer[0].clear ();
1967 _buffer[1].clear ();
1970 AlsaMidiPort::~AlsaMidiPort () { }
1972 struct MidiEventSorter {
1973 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
1978 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
1981 (_buffer[_bufperiod]).clear ();
1982 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
1983 i != get_connections ().end ();
1985 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
1986 for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1987 (_buffer[_bufperiod]).push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
1990 std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
1992 return &(_buffer[_bufperiod]);
1995 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1997 , _timestamp (timestamp)
2001 _data = (uint8_t*) malloc (size);
2002 memcpy (_data, data, size);
2006 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
2007 : _size (other.size ())
2008 , _timestamp (other.timestamp ())
2011 if (other.size () && other.const_data ()) {
2012 _data = (uint8_t*) malloc (other.size ());
2013 memcpy (_data, other.const_data (), other.size ());
2017 AlsaMidiEvent::~AlsaMidiEvent () {