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)
53 , _last_process_start (0)
54 , _process_speed_samples_per_ms (0)
56 , _midi_driver_option(_("None"))
57 , _device_reservation(0)
59 , _samples_per_period (1024)
60 , _periods_per_cycle (2)
63 , _systemic_audio_input_latency (0)
64 , _systemic_audio_output_latency (0)
66 , _processed_samples (0)
67 , _port_change_flag (false)
69 _instance_name = s_instance_name;
70 pthread_mutex_init (&_port_callback_mutex, 0);
73 AlsaAudioBackend::~AlsaAudioBackend ()
75 pthread_mutex_destroy (&_port_callback_mutex);
78 /* AUDIOBACKEND API */
81 AlsaAudioBackend::name () const
87 AlsaAudioBackend::is_realtime () const
92 std::vector<AudioBackend::DeviceStatus>
93 AlsaAudioBackend::enumerate_devices () const
95 _audio_device_status.clear();
96 std::map<std::string, std::string> devices;
97 get_alsa_audio_device_names(devices);
98 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
99 if (_audio_device == "") _audio_device = i->first;
100 _audio_device_status.push_back (DeviceStatus (i->first, true));
102 return _audio_device_status;
106 AlsaAudioBackend::reservation_stdout (std::string d, size_t /* s */)
108 if (d.substr(0, 19) == "Acquired audio-card") {
109 _reservation_succeeded = true;
114 AlsaAudioBackend::release_device()
116 _reservation_connection.drop_connections();
117 ARDOUR::SystemExec * tmp = _device_reservation;
118 _device_reservation = 0;
123 AlsaAudioBackend::acquire_device(const char* device_name)
125 /* This is quick hack, ideally we'll link against libdbus and implement a dbus-listener
126 * that owns the device. here we try to get away by just requesting it and then block it...
127 * (pulseaudio periodically checks anyway)
129 * dbus-send --session --print-reply --type=method_call --dest=org.freedesktop.ReserveDevice1.Audio2 /org/freedesktop/ReserveDevice1/Audio2 org.freedesktop.ReserveDevice1.RequestRelease int32:4
130 * -> should not return 'boolean false'
132 int device_number = card_to_num(device_name);
133 if (device_number < 0) return false;
135 assert(_device_reservation == 0);
136 _reservation_succeeded = false;
138 std::string request_device_exe;
139 if (!PBD::find_file (
140 PBD::Searchpath(Glib::build_filename(ARDOUR::ardour_dll_directory(), "ardouralsautil")
141 + G_SEARCHPATH_SEPARATOR_S + ARDOUR::ardour_dll_directory()),
142 "ardour-request-device", request_device_exe))
144 PBD::warning << "ardour-request-device binary was not found..'" << endmsg;
151 argp=(char**) calloc(5,sizeof(char*));
152 argp[0] = strdup(request_device_exe.c_str());
153 argp[1] = strdup("-P");
154 snprintf(tmp, sizeof(tmp), "%d", getpid());
155 argp[2] = strdup(tmp);
156 snprintf(tmp, sizeof(tmp), "Audio%d", device_number);
157 argp[3] = strdup(tmp);
160 _device_reservation = new ARDOUR::SystemExec(request_device_exe, argp);
161 _device_reservation->ReadStdout.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::reservation_stdout, this, _1 ,_2));
162 _device_reservation->Terminated.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::release_device, this));
163 if (_device_reservation->start(0)) {
164 PBD::warning << _("AlsaAudioBackend: Device Request failed.") << endmsg;
169 // wait to check if reservation suceeded.
170 int timeout = 500; // 5 sec
171 while (_device_reservation && !_reservation_succeeded && --timeout > 0) {
174 if (timeout == 0 || !_reservation_succeeded) {
175 PBD::warning << _("AlsaAudioBackend: Device Reservation failed.") << endmsg;
183 AlsaAudioBackend::available_sample_rates (const std::string&) const
185 std::vector<float> sr;
186 sr.push_back (8000.0);
187 sr.push_back (22050.0);
188 sr.push_back (24000.0);
189 sr.push_back (44100.0);
190 sr.push_back (48000.0);
191 sr.push_back (88200.0);
192 sr.push_back (96000.0);
193 sr.push_back (176400.0);
194 sr.push_back (192000.0);
198 std::vector<uint32_t>
199 AlsaAudioBackend::available_buffer_sizes (const std::string&) const
201 std::vector<uint32_t> bs;
215 AlsaAudioBackend::available_input_channel_count (const std::string&) const
217 return 128; // TODO query current device
221 AlsaAudioBackend::available_output_channel_count (const std::string&) const
223 return 128; // TODO query current device
227 AlsaAudioBackend::can_change_sample_rate_when_running () const
233 AlsaAudioBackend::can_change_buffer_size_when_running () const
235 return false; // why not? :)
239 AlsaAudioBackend::set_device_name (const std::string& d)
246 AlsaAudioBackend::set_sample_rate (float sr)
248 if (sr <= 0) { return -1; }
250 engine.sample_rate_change (sr);
255 AlsaAudioBackend::set_buffer_size (uint32_t bs)
257 if (bs <= 0 || bs >= _max_buffer_size) {
263 _samples_per_period = bs;
264 engine.buffer_size_change (bs);
269 AlsaAudioBackend::set_interleaved (bool yn)
271 if (!yn) { return 0; }
276 AlsaAudioBackend::set_input_channels (uint32_t cc)
283 AlsaAudioBackend::set_output_channels (uint32_t cc)
290 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
292 _systemic_audio_input_latency = sl;
297 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
299 _systemic_audio_output_latency = sl;
304 AlsaAudioBackend::set_systemic_midi_input_latency (std::string const device, uint32_t sl)
306 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
308 nfo->systemic_input_latency = sl;
313 AlsaAudioBackend::set_systemic_midi_output_latency (std::string const device, uint32_t sl)
315 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
317 nfo->systemic_output_latency = sl;
321 /* Retrieving parameters */
323 AlsaAudioBackend::device_name () const
325 return _audio_device;
329 AlsaAudioBackend::sample_rate () const
335 AlsaAudioBackend::buffer_size () const
337 return _samples_per_period;
341 AlsaAudioBackend::interleaved () const
347 AlsaAudioBackend::input_channels () const
353 AlsaAudioBackend::output_channels () const
359 AlsaAudioBackend::systemic_input_latency () const
361 return _systemic_audio_input_latency;
365 AlsaAudioBackend::systemic_output_latency () const
367 return _systemic_audio_output_latency;
371 AlsaAudioBackend::systemic_midi_input_latency (std::string const device) const
373 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
375 return nfo->systemic_input_latency;
379 AlsaAudioBackend::systemic_midi_output_latency (std::string const device) const
381 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
383 return nfo->systemic_output_latency;
387 struct AlsaAudioBackend::AlsaMidiDeviceInfo *
388 AlsaAudioBackend::midi_device_info(std::string const name) const {
389 for (std::map<std::string, struct AlsaMidiDeviceInfo*>::const_iterator i = _midi_devices.begin (); i != _midi_devices.end(); ++i) {
390 if (i->first == name) {
395 assert(_midi_driver_option != _("None"));
397 std::map<std::string, std::string> devices;
398 if (_midi_driver_option == _("ALSA raw devices")) {
399 get_alsa_rawmidi_device_names(devices);
401 get_alsa_sequencer_names (devices);
404 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
405 if (i->first == name) {
406 _midi_devices[name] = new AlsaMidiDeviceInfo();
407 return _midi_devices[name];
413 std::vector<std::string>
414 AlsaAudioBackend::enumerate_midi_options () const
416 if (_midi_options.empty()) {
417 _midi_options.push_back (_("ALSA raw devices"));
418 _midi_options.push_back (_("ALSA sequencer"));
419 _midi_options.push_back (_("None"));
421 return _midi_options;
424 std::vector<AudioBackend::DeviceStatus>
425 AlsaAudioBackend::enumerate_midi_devices () const
427 _midi_device_status.clear();
428 std::map<std::string, std::string> devices;
430 if (_midi_driver_option == _("ALSA raw devices")) {
431 get_alsa_rawmidi_device_names (devices);
433 else if (_midi_driver_option == _("ALSA sequencer")) {
434 get_alsa_sequencer_names (devices);
437 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
438 _midi_device_status.push_back (DeviceStatus (i->first, true));
440 return _midi_device_status;
444 AlsaAudioBackend::set_midi_option (const std::string& opt)
446 if (opt != _("None") && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
449 _midi_driver_option = opt;
454 AlsaAudioBackend::midi_option () const
456 return _midi_driver_option;
460 AlsaAudioBackend::set_midi_device_enabled (std::string const device, bool enable)
462 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
464 nfo->enabled = enable;
469 AlsaAudioBackend::midi_device_enabled (std::string const device) const
471 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
472 if (!nfo) return false;
478 static void * pthread_process (void *arg)
480 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
481 d->main_process_thread ();
487 AlsaAudioBackend::_start (bool for_latency_measurement)
489 if (!_active && _run) {
490 // recover from 'halted', reap threads
494 if (_active || _run) {
495 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
500 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
501 _system_inputs.clear();
502 _system_outputs.clear();
503 _system_midi_in.clear();
504 _system_midi_out.clear();
508 /* reset internal state */
510 _freewheeling = false;
512 _last_process_start = 0;
513 _process_speed_samples_per_ms = 0;
517 assert(_rmidi_in.size() == 0);
518 assert(_rmidi_out.size() == 0);
521 std::string alsa_device;
522 std::map<std::string, std::string> devices;
523 get_alsa_audio_device_names(devices);
524 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
525 if (i->first == _audio_device) {
526 alsa_device = i->second;
531 acquire_device(alsa_device.c_str());
532 _pcmi = new Alsa_pcmi (alsa_device.c_str(), alsa_device.c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
533 switch (_pcmi->state ()) {
534 case 0: /* OK */ break;
535 case -1: PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg; break;
536 case -2: PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg; break;
537 case -3: PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.") << endmsg; break;
538 case -4: PBD::error << _("AlsaAudioBackend: cannot set requested period size.") << endmsg; break;
539 case -5: PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.") << endmsg; break;
540 case -6: PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg; break;
541 default: PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg; break;
543 if (_pcmi->state ()) {
544 delete _pcmi; _pcmi = 0;
553 if (_n_outputs != _pcmi->nplay ()) {
554 if (_n_outputs == 0) {
555 _n_outputs = _pcmi->nplay ();
557 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
559 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
562 if (_n_inputs != _pcmi->ncapt ()) {
563 if (_n_inputs == 0) {
564 _n_inputs = _pcmi->ncapt ();
566 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
568 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
571 if (_pcmi->fsize() != _samples_per_period) {
572 _samples_per_period = _pcmi->fsize();
573 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
576 if (_pcmi->fsamp() != _samplerate) {
577 _samplerate = _pcmi->fsamp();
578 engine.sample_rate_change (_samplerate);
579 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
582 _measure_latency = for_latency_measurement;
584 register_system_midi_ports();
586 if (register_system_audio_ports()) {
587 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
588 delete _pcmi; _pcmi = 0;
593 engine.sample_rate_change (_samplerate);
594 engine.buffer_size_change (_samples_per_period);
596 if (engine.reestablish_ports ()) {
597 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
598 delete _pcmi; _pcmi = 0;
603 engine.reconnect_ports ();
605 _port_change_flag = false;
607 if (_realtime_pthread_create (SCHED_FIFO, -20, 100000,
608 &_main_thread, pthread_process, this))
610 if (pthread_create (&_main_thread, NULL, pthread_process, this))
612 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
613 delete _pcmi; _pcmi = 0;
618 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
623 while (!_active && --timeout > 0) { Glib::usleep (1000); }
625 if (timeout == 0 || !_active) {
626 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
627 delete _pcmi; _pcmi = 0;
637 AlsaAudioBackend::stop ()
645 if (pthread_join (_main_thread, &status)) {
646 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
650 while (!_rmidi_out.empty ()) {
651 AlsaMidiIO *m = _rmidi_out.back ();
653 _rmidi_out.pop_back ();
656 while (!_rmidi_in.empty ()) {
657 AlsaMidiIO *m = _rmidi_in.back ();
659 _rmidi_in.pop_back ();
664 delete _pcmi; _pcmi = 0;
667 return (_active == false) ? 0 : -1;
671 AlsaAudioBackend::freewheel (bool onoff)
673 _freewheeling = onoff;
678 AlsaAudioBackend::dsp_load () const
680 return 100.f * _dsp_load;
684 AlsaAudioBackend::raw_buffer_size (DataType t)
687 case DataType::AUDIO:
688 return _samples_per_period * sizeof(Sample);
690 return _max_buffer_size; // XXX not really limited
697 AlsaAudioBackend::sample_time ()
699 return _processed_samples;
703 AlsaAudioBackend::sample_time_at_cycle_start ()
705 return _processed_samples;
709 AlsaAudioBackend::samples_since_cycle_start ()
711 if (!_active || !_run || _freewheeling || _freewheel) {
714 if (_last_process_start == 0 || _process_speed_samples_per_ms) {
718 const int64_t elapsed_time_us = _last_process_start - g_get_monotonic_time();
720 assert(elapsed_time_us >=0);
722 /* linear extrapolation, using [low pass] filtered process-speed. */
723 const pframes_t processed_samples = elapsed_time_us * _process_speed_samples_per_ms * 1e-3;
725 if (processed_samples >= _samples_per_period) {
726 return _samples_per_period;
728 return processed_samples;
733 AlsaAudioBackend::alsa_process_thread (void *arg)
735 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
736 boost::function<void ()> f = td->f;
743 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
747 size_t stacksize = 100000;
749 ThreadData* td = new ThreadData (this, func, stacksize);
751 if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
752 &thread_id, alsa_process_thread, td)) {
753 pthread_attr_init (&attr);
754 pthread_attr_setstacksize (&attr, stacksize);
755 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
756 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
757 pthread_attr_destroy (&attr);
760 pthread_attr_destroy (&attr);
763 _threads.push_back (thread_id);
768 AlsaAudioBackend::join_process_threads ()
772 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
775 if (pthread_join (*i, &status)) {
776 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
785 AlsaAudioBackend::in_process_thread ()
787 if (pthread_equal (_main_thread, pthread_self()) != 0) {
791 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
793 if (pthread_equal (*i, pthread_self ()) != 0) {
801 AlsaAudioBackend::process_thread_count ()
803 return _threads.size ();
807 AlsaAudioBackend::update_latencies ()
809 // trigger latency callback in RT thread (locked graph)
810 port_connect_add_remove_callback();
816 AlsaAudioBackend::private_handle () const
822 AlsaAudioBackend::my_name () const
824 return _instance_name;
828 AlsaAudioBackend::available () const
830 return _run && _active;
834 AlsaAudioBackend::port_name_size () const
840 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
842 if (!valid_port (port)) {
843 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
846 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
850 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
852 if (!valid_port (port)) {
853 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
854 return std::string ();
856 return static_cast<AlsaPort*>(port)->name ();
859 PortEngine::PortHandle
860 AlsaAudioBackend::get_port_by_name (const std::string& name) const
862 PortHandle port = (PortHandle) find_port (name);
867 AlsaAudioBackend::get_ports (
868 const std::string& port_name_pattern,
869 DataType type, PortFlags flags,
870 std::vector<std::string>& port_names) const
874 bool use_regexp = false;
875 if (port_name_pattern.size () > 0) {
876 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
880 for (size_t i = 0; i < _ports.size (); ++i) {
881 AlsaPort* port = _ports[i];
882 if ((port->type () == type) && (port->flags () & flags)) {
883 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
884 port_names.push_back (port->name ());
890 regfree (&port_regex);
896 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
898 if (!valid_port (port)) {
899 return DataType::NIL;
901 return static_cast<AlsaPort*>(port)->type ();
904 PortEngine::PortHandle
905 AlsaAudioBackend::register_port (
906 const std::string& name,
907 ARDOUR::DataType type,
908 ARDOUR::PortFlags flags)
910 if (name.size () == 0) { return 0; }
911 if (flags & IsPhysical) { return 0; }
912 return add_port (_instance_name + ":" + name, type, flags);
915 PortEngine::PortHandle
916 AlsaAudioBackend::add_port (
917 const std::string& name,
918 ARDOUR::DataType type,
919 ARDOUR::PortFlags flags)
921 assert(name.size ());
922 if (find_port (name)) {
923 PBD::error << _("AlsaBackend::register_port: Port already exists:")
924 << " (" << name << ")" << endmsg;
927 AlsaPort* port = NULL;
929 case DataType::AUDIO:
930 port = new AlsaAudioPort (*this, name, flags);
933 port = new AlsaMidiPort (*this, name, flags);
936 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
940 _ports.push_back (port);
946 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
951 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
952 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
953 if (i == _ports.end ()) {
954 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
957 disconnect_all(port_handle);
963 AlsaAudioBackend::register_system_audio_ports()
967 const int a_ins = _n_inputs > 0 ? _n_inputs : 2;
968 const int a_out = _n_outputs > 0 ? _n_outputs : 2;
971 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_input_latency);
972 for (int i = 1; i <= a_ins; ++i) {
974 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
975 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
977 set_latency_range (p, false, lr);
978 _system_inputs.push_back(static_cast<AlsaPort*>(p));
981 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_output_latency);
982 for (int i = 1; i <= a_out; ++i) {
984 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
985 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
987 set_latency_range (p, true, lr);
988 _system_outputs.push_back(static_cast<AlsaPort*>(p));
994 AlsaAudioBackend::register_system_midi_ports()
996 std::map<std::string, std::string> devices;
1000 if (_midi_driver_option == _("None")) {
1002 } else if (_midi_driver_option == _("ALSA raw devices")) {
1003 get_alsa_rawmidi_device_names(devices);
1005 get_alsa_sequencer_names (devices);
1008 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
1009 struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first);
1011 if (!nfo->enabled) continue;
1014 if (_midi_driver_option == _("ALSA raw devices")) {
1015 mout = new AlsaRawMidiOut (i->second.c_str());
1017 mout = new AlsaSeqMidiOut (i->second.c_str());
1020 if (mout->state ()) {
1021 PBD::warning << string_compose (
1022 _("AlsaMidiOut: failed to open midi device '%1'."), i->second)
1026 mout->setup_timing(_samples_per_period, _samplerate);
1027 mout->sync_time (g_get_monotonic_time());
1028 if (mout->start ()) {
1029 PBD::warning << string_compose (
1030 _("AlsaMidiOut: failed to start midi device '%1'."), i->second)
1035 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", ++midi_ins);
1036 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1042 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
1043 set_latency_range (p, false, lr);
1044 static_cast<AlsaMidiPort*>(p)->set_n_periods(2);
1045 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
1046 _rmidi_out.push_back (mout);
1051 if (_midi_driver_option == _("ALSA raw devices")) {
1052 midin = new AlsaRawMidiIn (i->second.c_str());
1054 midin = new AlsaSeqMidiIn (i->second.c_str());
1057 if (midin->state ()) {
1058 PBD::warning << string_compose (
1059 _("AlsaMidiIn: failed to open midi device '%1'."), i->second)
1063 midin->setup_timing(_samples_per_period, _samplerate);
1064 midin->sync_time (g_get_monotonic_time());
1065 if (midin->start ()) {
1066 PBD::warning << string_compose (
1067 _("AlsaMidiIn: failed to start midi device '%1'."), i->second)
1072 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", ++midi_outs);
1073 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1080 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
1081 set_latency_range (p, false, lr);
1082 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
1083 _rmidi_in.push_back (midin);
1091 AlsaAudioBackend::unregister_ports (bool system_only)
1094 _system_inputs.clear();
1095 _system_outputs.clear();
1096 _system_midi_in.clear();
1097 _system_midi_out.clear();
1098 while (i < _ports.size ()) {
1099 AlsaPort* port = _ports[i];
1100 if (! system_only || (port->is_physical () && port->is_terminal ())) {
1101 port->disconnect_all ();
1103 _ports.erase (_ports.begin() + i);
1111 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
1113 AlsaPort* src_port = find_port (src);
1114 AlsaPort* dst_port = find_port (dst);
1117 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
1118 << " (" << src <<")" << endmsg;
1122 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
1123 << " (" << dst <<")" << endmsg;
1126 return src_port->connect (dst_port);
1130 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
1132 AlsaPort* src_port = find_port (src);
1133 AlsaPort* dst_port = find_port (dst);
1135 if (!src_port || !dst_port) {
1136 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1139 return src_port->disconnect (dst_port);
1143 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1145 AlsaPort* dst_port = find_port (dst);
1146 if (!valid_port (src)) {
1147 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1151 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1152 << " (" << dst << ")" << endmsg;
1155 return static_cast<AlsaPort*>(src)->connect (dst_port);
1159 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1161 AlsaPort* dst_port = find_port (dst);
1162 if (!valid_port (src) || !dst_port) {
1163 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1166 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1170 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1172 if (!valid_port (port)) {
1173 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1176 static_cast<AlsaPort*>(port)->disconnect_all ();
1181 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1183 if (!valid_port (port)) {
1184 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1187 return static_cast<AlsaPort*>(port)->is_connected ();
1191 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1193 AlsaPort* dst_port = find_port (dst);
1194 if (!valid_port (src) || !dst_port) {
1195 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1198 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1202 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1204 if (!valid_port (port)) {
1205 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1208 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1212 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1214 if (!valid_port (port)) {
1215 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1219 assert (0 == names.size ());
1221 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1223 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1224 names.push_back ((*i)->name ());
1227 return (int)names.size ();
1232 AlsaAudioBackend::midi_event_get (
1233 pframes_t& timestamp,
1234 size_t& size, uint8_t** buf, void* port_buffer,
1235 uint32_t event_index)
1237 assert (buf && port_buffer);
1238 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1239 if (event_index >= source.size ()) {
1242 AlsaMidiEvent * const event = source[event_index].get ();
1244 timestamp = event->timestamp ();
1245 size = event->size ();
1246 *buf = event->data ();
1251 AlsaAudioBackend::midi_event_put (
1253 pframes_t timestamp,
1254 const uint8_t* buffer, size_t size)
1256 assert (buffer && port_buffer);
1257 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1258 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1259 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1260 (pframes_t)dst.back ()->timestamp (), timestamp);
1263 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1268 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1270 assert (port_buffer);
1271 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1275 AlsaAudioBackend::midi_clear (void* port_buffer)
1277 assert (port_buffer);
1278 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1286 AlsaAudioBackend::can_monitor_input () const
1292 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1298 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1304 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1309 /* Latency management */
1312 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1314 if (!valid_port (port)) {
1315 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1317 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1321 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1324 if (!valid_port (port)) {
1325 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1330 AlsaPort *p = static_cast<AlsaPort*>(port);
1333 r = p->latency_range (for_playback);
1334 if (p->is_physical() && p->is_terminal()) {
1335 if (p->is_input() && for_playback) {
1336 r.min += _samples_per_period;
1337 r.max += _samples_per_period;
1339 if (p->is_output() && !for_playback) {
1340 r.min += _samples_per_period;
1341 r.max += _samples_per_period;
1347 /* Discovering physical ports */
1350 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1352 if (!valid_port (port)) {
1353 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1356 return static_cast<AlsaPort*>(port)->is_physical ();
1360 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1362 for (size_t i = 0; i < _ports.size (); ++i) {
1363 AlsaPort* port = _ports[i];
1364 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1365 port_names.push_back (port->name ());
1371 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1373 for (size_t i = 0; i < _ports.size (); ++i) {
1374 AlsaPort* port = _ports[i];
1375 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1376 port_names.push_back (port->name ());
1382 AlsaAudioBackend::n_physical_outputs () const
1386 for (size_t i = 0; i < _ports.size (); ++i) {
1387 AlsaPort* port = _ports[i];
1388 if (port->is_output () && port->is_physical ()) {
1389 switch (port->type ()) {
1390 case DataType::AUDIO: ++n_audio; break;
1391 case DataType::MIDI: ++n_midi; break;
1397 cc.set (DataType::AUDIO, n_audio);
1398 cc.set (DataType::MIDI, n_midi);
1403 AlsaAudioBackend::n_physical_inputs () const
1407 for (size_t i = 0; i < _ports.size (); ++i) {
1408 AlsaPort* port = _ports[i];
1409 if (port->is_input () && port->is_physical ()) {
1410 switch (port->type ()) {
1411 case DataType::AUDIO: ++n_audio; break;
1412 case DataType::MIDI: ++n_midi; break;
1418 cc.set (DataType::AUDIO, n_audio);
1419 cc.set (DataType::MIDI, n_midi);
1423 /* Getting access to the data buffer for a port */
1426 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1429 assert (valid_port (port));
1430 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1433 /* Engine Process */
1435 AlsaAudioBackend::main_process_thread ()
1437 AudioEngine::thread_init_callback (this);
1439 _processed_samples = 0;
1441 uint64_t clock1, clock2;
1442 _pcmi->pcm_start ();
1443 int no_proc_errors = 0;
1444 const int bailout = 2 * _samplerate / _samples_per_period;
1445 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1447 manager.registration_callback();
1448 manager.graph_order_callback();
1454 if (_freewheeling != _freewheel) {
1455 _freewheel = _freewheeling;
1456 engine.freewheel_callback (_freewheel);
1460 nr = _pcmi->pcm_wait ();
1462 if (_pcmi->state () > 0) {
1466 if (_pcmi->state () < 0) {
1467 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1470 if (no_proc_errors > bailout) {
1473 _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."),
1479 while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) {
1481 clock1 = g_get_monotonic_time();
1484 _pcmi->capt_init (_samples_per_period);
1485 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1486 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1488 _pcmi->capt_done (_samples_per_period);
1490 /* de-queue incoming midi*/
1492 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1493 assert (_rmidi_in.size() > i);
1494 AlsaMidiIn *rm = _rmidi_in.at(i);
1495 void *bptr = (*it)->get_buffer(0);
1497 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1498 size_t size = sizeof(data);
1500 while (rm->recv_event (time, data, size)) {
1501 midi_event_put(bptr, time, data, size);
1502 size = sizeof(data);
1504 rm->sync_time (clock1);
1507 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1508 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1511 /* call engine process callback */
1512 _last_process_start = g_get_monotonic_time();
1513 if (engine.process_callback (_samples_per_period)) {
1519 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1520 static_cast<AlsaMidiPort*>(*it)->next_period();
1523 /* queue outgoing midi */
1525 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1526 assert (_rmidi_out.size() > i);
1527 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
1528 AlsaMidiOut *rm = _rmidi_out.at(i);
1529 rm->sync_time (clock1);
1530 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1531 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1535 /* write back audio */
1537 _pcmi->play_init (_samples_per_period);
1538 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1539 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1541 for (; i < _pcmi->nplay (); ++i) {
1542 _pcmi->clear_chan (i, _samples_per_period);
1544 _pcmi->play_done (_samples_per_period);
1545 nr -= _samples_per_period;
1546 _processed_samples += _samples_per_period;
1548 /* calculate DSP load */
1549 clock2 = g_get_monotonic_time();
1550 const int64_t elapsed_time = clock2 - clock1;
1551 _dsp_load = elapsed_time / (float) nomial_time;
1553 const double ps = 1e3 * _samples_per_period / elapsed_time;
1554 // low pass filter, The time-constant should really be
1555 // 1.0 - e^(-2.0 * π * v / SR);
1556 // with v = _samples_per_period / N, and SR = _samples_per_period;
1557 _process_speed_samples_per_ms = _process_speed_samples_per_ms + .05 * (ps - _process_speed_samples_per_ms) + 1e-12;
1560 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1563 fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n",
1564 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1570 // zero audio input buffers
1571 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1572 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1575 clock1 = g_get_monotonic_time();
1577 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1578 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1579 AlsaMidiIn *rm = _rmidi_in.at(i);
1580 void *bptr = (*it)->get_buffer(0);
1581 midi_clear(bptr); // zero midi buffer
1583 // TODO add an API call for this.
1585 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1586 size_t size = sizeof(data);
1587 while (rm->recv_event (time, data, size)) {
1588 ; // discard midi-data from HW.
1590 rm->sync_time (clock1);
1593 _last_process_start = 0;
1594 if (engine.process_callback (_samples_per_period)) {
1600 // drop all outgoing MIDI messages
1601 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1602 void *bptr = (*it)->get_buffer(0);
1607 Glib::usleep (100); // don't hog cpu
1610 bool connections_changed = false;
1611 bool ports_changed = false;
1612 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1613 if (_port_change_flag) {
1614 ports_changed = true;
1615 _port_change_flag = false;
1617 if (!_port_connection_queue.empty ()) {
1618 connections_changed = true;
1620 while (!_port_connection_queue.empty ()) {
1621 PortConnectData *c = _port_connection_queue.back ();
1622 manager.connect_callback (c->a, c->b, c->c);
1623 _port_connection_queue.pop_back ();
1626 pthread_mutex_unlock (&_port_callback_mutex);
1628 if (ports_changed) {
1629 manager.registration_callback();
1631 if (connections_changed) {
1632 manager.graph_order_callback();
1634 if (connections_changed || ports_changed) {
1635 engine.latency_callback(false);
1636 engine.latency_callback(true);
1643 engine.halted_callback("ALSA I/O error.");
1649 /******************************************************************************/
1651 static boost::shared_ptr<AlsaAudioBackend> _instance;
1653 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1654 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1655 static int deinstantiate ();
1656 static bool already_configured ();
1657 static bool available ();
1659 static ARDOUR::AudioBackendInfo _descriptor = {
1668 static boost::shared_ptr<AudioBackend>
1669 backend_factory (AudioEngine& e)
1672 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1678 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1680 s_instance_name = arg1;
1692 already_configured ()
1703 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1705 return &_descriptor;
1709 /******************************************************************************/
1710 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1715 _capture_latency_range.min = 0;
1716 _capture_latency_range.max = 0;
1717 _playback_latency_range.min = 0;
1718 _playback_latency_range.max = 0;
1721 AlsaPort::~AlsaPort () {
1726 int AlsaPort::connect (AlsaPort *port)
1729 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1733 if (type () != port->type ()) {
1734 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
1738 if (is_output () && port->is_output ()) {
1739 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
1743 if (is_input () && port->is_input ()) {
1744 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
1749 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
1753 if (is_connected (port)) {
1754 #if 0 // don't bother to warn about this for now. just ignore it
1755 PBD::error << _("AlsaPort::connect (): ports are already connected:")
1756 << " (" << name () << ") -> (" << port->name () << ")"
1762 _connect (port, true);
1767 void AlsaPort::_connect (AlsaPort *port, bool callback)
1769 _connections.push_back (port);
1771 port->_connect (this, false);
1772 _alsa_backend.port_connect_callback (name(), port->name(), true);
1776 int AlsaPort::disconnect (AlsaPort *port)
1779 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
1783 if (!is_connected (port)) {
1784 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
1785 << " (" << name () << ") -> (" << port->name () << ")"
1789 _disconnect (port, true);
1793 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
1795 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1797 assert (it != _connections.end ());
1799 _connections.erase (it);
1802 port->_disconnect (this, false);
1803 _alsa_backend.port_connect_callback (name(), port->name(), false);
1808 void AlsaPort::disconnect_all ()
1810 while (!_connections.empty ()) {
1811 _connections.back ()->_disconnect (this, false);
1812 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1813 _connections.pop_back ();
1818 AlsaPort::is_connected (const AlsaPort *port) const
1820 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1823 bool AlsaPort::is_physically_connected () const
1825 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1826 if ((*it)->is_physical ()) {
1833 /******************************************************************************/
1835 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1836 : AlsaPort (b, name, flags)
1838 memset (_buffer, 0, sizeof (_buffer));
1839 mlock(_buffer, sizeof (_buffer));
1842 AlsaAudioPort::~AlsaAudioPort () { }
1844 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
1847 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
1848 if (it == get_connections ().end ()) {
1849 memset (_buffer, 0, n_samples * sizeof (Sample));
1851 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
1852 assert (source && source->is_output ());
1853 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1854 while (++it != get_connections ().end ()) {
1855 source = static_cast<const AlsaAudioPort*>(*it);
1856 assert (source && source->is_output ());
1857 Sample* dst = buffer ();
1858 const Sample* src = source->const_buffer ();
1859 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1869 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1870 : AlsaPort (b, name, flags)
1874 _buffer[0].clear ();
1875 _buffer[1].clear ();
1878 AlsaMidiPort::~AlsaMidiPort () { }
1880 struct MidiEventSorter {
1881 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
1886 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
1889 (_buffer[_bufperiod]).clear ();
1890 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
1891 i != get_connections ().end ();
1893 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
1894 for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1895 (_buffer[_bufperiod]).push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
1898 std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
1900 return &(_buffer[_bufperiod]);
1903 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1905 , _timestamp (timestamp)
1909 _data = (uint8_t*) malloc (size);
1910 memcpy (_data, data, size);
1914 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
1915 : _size (other.size ())
1916 , _timestamp (other.timestamp ())
1919 if (other.size () && other.const_data ()) {
1920 _data = (uint8_t*) malloc (other.size ());
1921 memcpy (_data, other.const_data (), other.size ());
1925 AlsaMidiEvent::~AlsaMidiEvent () {