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
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) {
260 _samples_per_period = bs;
261 engine.buffer_size_change (bs);
266 AlsaAudioBackend::set_interleaved (bool yn)
268 if (!yn) { return 0; }
273 AlsaAudioBackend::set_input_channels (uint32_t cc)
280 AlsaAudioBackend::set_output_channels (uint32_t cc)
287 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
289 _systemic_audio_input_latency = sl;
294 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
296 _systemic_audio_output_latency = sl;
301 AlsaAudioBackend::set_systemic_midi_input_latency (std::string const device, uint32_t sl)
303 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
305 nfo->systemic_input_latency = sl;
310 AlsaAudioBackend::set_systemic_midi_output_latency (std::string const device, uint32_t sl)
312 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
314 nfo->systemic_output_latency = sl;
318 /* Retrieving parameters */
320 AlsaAudioBackend::device_name () const
322 return _audio_device;
326 AlsaAudioBackend::sample_rate () const
332 AlsaAudioBackend::buffer_size () const
334 return _samples_per_period;
338 AlsaAudioBackend::interleaved () const
344 AlsaAudioBackend::input_channels () const
350 AlsaAudioBackend::output_channels () const
356 AlsaAudioBackend::systemic_input_latency () const
358 return _systemic_audio_input_latency;
362 AlsaAudioBackend::systemic_output_latency () const
364 return _systemic_audio_output_latency;
368 AlsaAudioBackend::systemic_midi_input_latency (std::string const device) const
370 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
372 return nfo->systemic_input_latency;
376 AlsaAudioBackend::systemic_midi_output_latency (std::string const device) const
378 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
380 return nfo->systemic_output_latency;
384 struct AlsaAudioBackend::AlsaMidiDeviceInfo *
385 AlsaAudioBackend::midi_device_info(std::string const name) const {
386 for (std::map<std::string, struct AlsaMidiDeviceInfo*>::const_iterator i = _midi_devices.begin (); i != _midi_devices.end(); ++i) {
387 if (i->first == name) {
392 assert(_midi_driver_option != _("None"));
394 std::map<std::string, std::string> devices;
395 if (_midi_driver_option == _("ALSA raw devices")) {
396 get_alsa_rawmidi_device_names(devices);
398 get_alsa_sequencer_names (devices);
401 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
402 if (i->first == name) {
403 _midi_devices[name] = new AlsaMidiDeviceInfo();
404 return _midi_devices[name];
410 std::vector<std::string>
411 AlsaAudioBackend::enumerate_midi_options () const
413 if (_midi_options.empty()) {
414 _midi_options.push_back (_("ALSA raw devices"));
415 _midi_options.push_back (_("ALSA sequencer"));
416 _midi_options.push_back (_("None"));
418 return _midi_options;
421 std::vector<AudioBackend::DeviceStatus>
422 AlsaAudioBackend::enumerate_midi_devices () const
424 _midi_device_status.clear();
425 std::map<std::string, std::string> devices;
427 if (_midi_driver_option == _("ALSA raw devices")) {
428 get_alsa_rawmidi_device_names (devices);
430 else if (_midi_driver_option == _("ALSA sequencer")) {
431 get_alsa_sequencer_names (devices);
434 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
435 _midi_device_status.push_back (DeviceStatus (i->first, true));
437 return _midi_device_status;
441 AlsaAudioBackend::set_midi_option (const std::string& opt)
443 if (opt != _("None") && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
446 _midi_driver_option = opt;
451 AlsaAudioBackend::midi_option () const
453 return _midi_driver_option;
457 AlsaAudioBackend::set_midi_device_enabled (std::string const device, bool enable)
459 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
461 nfo->enabled = enable;
466 AlsaAudioBackend::midi_device_enabled (std::string const device) const
468 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
469 if (!nfo) return false;
475 static void * pthread_process (void *arg)
477 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
478 d->main_process_thread ();
484 AlsaAudioBackend::_start (bool for_latency_measurement)
486 if (!_active && _run) {
487 // recover from 'halted', reap threads
491 if (_active || _run) {
492 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
497 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
498 _system_inputs.clear();
499 _system_outputs.clear();
500 _system_midi_in.clear();
501 _system_midi_out.clear();
505 /* reset internal state */
507 _freewheeling = false;
509 _last_process_start = 0;
510 _process_speed_samples_per_ms = 0;
514 assert(_rmidi_in.size() == 0);
515 assert(_rmidi_out.size() == 0);
518 std::string alsa_device;
519 std::map<std::string, std::string> devices;
520 get_alsa_audio_device_names(devices);
521 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
522 if (i->first == _audio_device) {
523 alsa_device = i->second;
528 acquire_device(alsa_device.c_str());
529 _pcmi = new Alsa_pcmi (alsa_device.c_str(), alsa_device.c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
530 switch (_pcmi->state ()) {
531 case 0: /* OK */ break;
532 case -1: PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg; break;
533 case -2: PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg; break;
534 case -3: PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.") << endmsg; break;
535 case -4: PBD::error << _("AlsaAudioBackend: cannot set requested period size.") << endmsg; break;
536 case -5: PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.") << endmsg; break;
537 case -6: PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg; break;
538 default: PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg; break;
540 if (_pcmi->state ()) {
541 delete _pcmi; _pcmi = 0;
550 if (_n_outputs != _pcmi->nplay ()) {
551 if (_n_outputs == 0) {
552 _n_outputs = _pcmi->nplay ();
554 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
556 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
559 if (_n_inputs != _pcmi->ncapt ()) {
560 if (_n_inputs == 0) {
561 _n_inputs = _pcmi->ncapt ();
563 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
565 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
568 if (_pcmi->fsize() != _samples_per_period) {
569 _samples_per_period = _pcmi->fsize();
570 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
573 if (_pcmi->fsamp() != _samplerate) {
574 _samplerate = _pcmi->fsamp();
575 engine.sample_rate_change (_samplerate);
576 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
579 _measure_latency = for_latency_measurement;
581 register_system_midi_ports();
583 if (register_system_audio_ports()) {
584 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
585 delete _pcmi; _pcmi = 0;
590 engine.sample_rate_change (_samplerate);
591 engine.buffer_size_change (_samples_per_period);
593 if (engine.reestablish_ports ()) {
594 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
595 delete _pcmi; _pcmi = 0;
600 engine.reconnect_ports ();
602 _port_change_flag = false;
604 if (_realtime_pthread_create (SCHED_FIFO, -20, 100000,
605 &_main_thread, pthread_process, this))
607 if (pthread_create (&_main_thread, NULL, pthread_process, this))
609 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
610 delete _pcmi; _pcmi = 0;
615 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
620 while (!_active && --timeout > 0) { Glib::usleep (1000); }
622 if (timeout == 0 || !_active) {
623 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
624 delete _pcmi; _pcmi = 0;
634 AlsaAudioBackend::stop ()
642 if (pthread_join (_main_thread, &status)) {
643 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
647 while (!_rmidi_out.empty ()) {
648 AlsaMidiIO *m = _rmidi_out.back ();
650 _rmidi_out.pop_back ();
653 while (!_rmidi_in.empty ()) {
654 AlsaMidiIO *m = _rmidi_in.back ();
656 _rmidi_in.pop_back ();
661 delete _pcmi; _pcmi = 0;
664 return (_active == false) ? 0 : -1;
668 AlsaAudioBackend::freewheel (bool onoff)
670 _freewheeling = onoff;
675 AlsaAudioBackend::dsp_load () const
677 return 100.f * _dsp_load;
681 AlsaAudioBackend::raw_buffer_size (DataType t)
684 case DataType::AUDIO:
685 return _samples_per_period * sizeof(Sample);
687 return _max_buffer_size; // XXX not really limited
694 AlsaAudioBackend::sample_time ()
696 return _processed_samples;
700 AlsaAudioBackend::sample_time_at_cycle_start ()
702 return _processed_samples;
706 AlsaAudioBackend::samples_since_cycle_start ()
708 if (!_active || !_run || _freewheeling || _freewheel) {
711 if (_last_process_start == 0 || _process_speed_samples_per_ms) {
715 const int64_t elapsed_time_us = _last_process_start - g_get_monotonic_time();
717 assert(elapsed_time_us >=0);
719 /* linear extrapolation, using [low pass] filtered process-speed. */
720 const pframes_t processed_samples = elapsed_time_us * _process_speed_samples_per_ms * 1e-3;
722 if (processed_samples >= _samples_per_period) {
723 return _samples_per_period;
725 return processed_samples;
730 AlsaAudioBackend::alsa_process_thread (void *arg)
732 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
733 boost::function<void ()> f = td->f;
740 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
744 size_t stacksize = 100000;
746 ThreadData* td = new ThreadData (this, func, stacksize);
748 if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
749 &thread_id, alsa_process_thread, td)) {
750 pthread_attr_init (&attr);
751 pthread_attr_setstacksize (&attr, stacksize);
752 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
753 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
754 pthread_attr_destroy (&attr);
757 pthread_attr_destroy (&attr);
760 _threads.push_back (thread_id);
765 AlsaAudioBackend::join_process_threads ()
769 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
772 if (pthread_join (*i, &status)) {
773 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
782 AlsaAudioBackend::in_process_thread ()
784 if (pthread_equal (_main_thread, pthread_self()) != 0) {
788 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
790 if (pthread_equal (*i, pthread_self ()) != 0) {
798 AlsaAudioBackend::process_thread_count ()
800 return _threads.size ();
804 AlsaAudioBackend::update_latencies ()
806 // trigger latency callback in RT thread (locked graph)
807 port_connect_add_remove_callback();
813 AlsaAudioBackend::private_handle () const
819 AlsaAudioBackend::my_name () const
821 return _instance_name;
825 AlsaAudioBackend::available () const
827 return _run && _active;
831 AlsaAudioBackend::port_name_size () const
837 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
839 if (!valid_port (port)) {
840 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
843 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
847 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
849 if (!valid_port (port)) {
850 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
851 return std::string ();
853 return static_cast<AlsaPort*>(port)->name ();
856 PortEngine::PortHandle
857 AlsaAudioBackend::get_port_by_name (const std::string& name) const
859 PortHandle port = (PortHandle) find_port (name);
864 AlsaAudioBackend::get_ports (
865 const std::string& port_name_pattern,
866 DataType type, PortFlags flags,
867 std::vector<std::string>& port_names) const
871 bool use_regexp = false;
872 if (port_name_pattern.size () > 0) {
873 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
877 for (size_t i = 0; i < _ports.size (); ++i) {
878 AlsaPort* port = _ports[i];
879 if ((port->type () == type) && (port->flags () & flags)) {
880 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
881 port_names.push_back (port->name ());
887 regfree (&port_regex);
893 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
895 if (!valid_port (port)) {
896 return DataType::NIL;
898 return static_cast<AlsaPort*>(port)->type ();
901 PortEngine::PortHandle
902 AlsaAudioBackend::register_port (
903 const std::string& name,
904 ARDOUR::DataType type,
905 ARDOUR::PortFlags flags)
907 if (name.size () == 0) { return 0; }
908 if (flags & IsPhysical) { return 0; }
909 return add_port (_instance_name + ":" + name, type, flags);
912 PortEngine::PortHandle
913 AlsaAudioBackend::add_port (
914 const std::string& name,
915 ARDOUR::DataType type,
916 ARDOUR::PortFlags flags)
918 assert(name.size ());
919 if (find_port (name)) {
920 PBD::error << _("AlsaBackend::register_port: Port already exists:")
921 << " (" << name << ")" << endmsg;
924 AlsaPort* port = NULL;
926 case DataType::AUDIO:
927 port = new AlsaAudioPort (*this, name, flags);
930 port = new AlsaMidiPort (*this, name, flags);
933 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
937 _ports.push_back (port);
943 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
948 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
949 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
950 if (i == _ports.end ()) {
951 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
954 disconnect_all(port_handle);
960 AlsaAudioBackend::register_system_audio_ports()
964 const int a_ins = _n_inputs > 0 ? _n_inputs : 2;
965 const int a_out = _n_outputs > 0 ? _n_outputs : 2;
968 lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : _systemic_audio_input_latency);
969 for (int i = 1; i <= a_ins; ++i) {
971 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
972 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
974 set_latency_range (p, false, lr);
975 _system_inputs.push_back(static_cast<AlsaPort*>(p));
978 lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : _systemic_audio_output_latency);
979 for (int i = 1; i <= a_out; ++i) {
981 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
982 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
984 set_latency_range (p, true, lr);
985 _system_outputs.push_back(static_cast<AlsaPort*>(p));
991 AlsaAudioBackend::register_system_midi_ports()
993 std::map<std::string, std::string> devices;
997 if (_midi_driver_option == _("None")) {
999 } else if (_midi_driver_option == _("ALSA raw devices")) {
1000 get_alsa_rawmidi_device_names(devices);
1002 get_alsa_sequencer_names (devices);
1005 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
1006 struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first);
1008 if (!nfo->enabled) continue;
1011 if (_midi_driver_option == _("ALSA raw devices")) {
1012 mout = new AlsaRawMidiOut (i->second.c_str());
1014 mout = new AlsaSeqMidiOut (i->second.c_str());
1017 if (mout->state ()) {
1018 PBD::warning << string_compose (
1019 _("AlsaMidiOut: failed to open midi device '%1'."), i->second)
1023 mout->setup_timing(_samples_per_period, _samplerate);
1024 mout->sync_time (g_get_monotonic_time());
1025 if (mout->start ()) {
1026 PBD::warning << string_compose (
1027 _("AlsaMidiOut: failed to start midi device '%1'."), i->second)
1032 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", ++midi_ins);
1033 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1039 lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : nfo->systemic_output_latency);
1040 set_latency_range (p, false, lr);
1041 static_cast<AlsaMidiPort*>(p)->set_n_periods(2);
1042 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
1043 _rmidi_out.push_back (mout);
1048 if (_midi_driver_option == _("ALSA raw devices")) {
1049 midin = new AlsaRawMidiIn (i->second.c_str());
1051 midin = new AlsaSeqMidiIn (i->second.c_str());
1054 if (midin->state ()) {
1055 PBD::warning << string_compose (
1056 _("AlsaMidiIn: failed to open midi device '%1'."), i->second)
1060 midin->setup_timing(_samples_per_period, _samplerate);
1061 midin->sync_time (g_get_monotonic_time());
1062 if (midin->start ()) {
1063 PBD::warning << string_compose (
1064 _("AlsaMidiIn: failed to start midi device '%1'."), i->second)
1069 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", ++midi_outs);
1070 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1077 lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : nfo->systemic_input_latency);
1078 set_latency_range (p, false, lr);
1079 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
1080 _rmidi_in.push_back (midin);
1088 AlsaAudioBackend::unregister_ports (bool system_only)
1091 _system_inputs.clear();
1092 _system_outputs.clear();
1093 _system_midi_in.clear();
1094 _system_midi_out.clear();
1095 while (i < _ports.size ()) {
1096 AlsaPort* port = _ports[i];
1097 if (! system_only || (port->is_physical () && port->is_terminal ())) {
1098 port->disconnect_all ();
1100 _ports.erase (_ports.begin() + i);
1108 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
1110 AlsaPort* src_port = find_port (src);
1111 AlsaPort* dst_port = find_port (dst);
1114 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
1115 << " (" << src <<")" << endmsg;
1119 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
1120 << " (" << dst <<")" << endmsg;
1123 return src_port->connect (dst_port);
1127 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
1129 AlsaPort* src_port = find_port (src);
1130 AlsaPort* dst_port = find_port (dst);
1132 if (!src_port || !dst_port) {
1133 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1136 return src_port->disconnect (dst_port);
1140 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1142 AlsaPort* dst_port = find_port (dst);
1143 if (!valid_port (src)) {
1144 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1148 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1149 << " (" << dst << ")" << endmsg;
1152 return static_cast<AlsaPort*>(src)->connect (dst_port);
1156 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1158 AlsaPort* dst_port = find_port (dst);
1159 if (!valid_port (src) || !dst_port) {
1160 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1163 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1167 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1169 if (!valid_port (port)) {
1170 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1173 static_cast<AlsaPort*>(port)->disconnect_all ();
1178 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1180 if (!valid_port (port)) {
1181 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1184 return static_cast<AlsaPort*>(port)->is_connected ();
1188 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1190 AlsaPort* dst_port = find_port (dst);
1191 if (!valid_port (src) || !dst_port) {
1192 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1195 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1199 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1201 if (!valid_port (port)) {
1202 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1205 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1209 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1211 if (!valid_port (port)) {
1212 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1216 assert (0 == names.size ());
1218 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1220 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1221 names.push_back ((*i)->name ());
1224 return (int)names.size ();
1229 AlsaAudioBackend::midi_event_get (
1230 pframes_t& timestamp,
1231 size_t& size, uint8_t** buf, void* port_buffer,
1232 uint32_t event_index)
1234 assert (buf && port_buffer);
1235 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1236 if (event_index >= source.size ()) {
1239 AlsaMidiEvent * const event = source[event_index].get ();
1241 timestamp = event->timestamp ();
1242 size = event->size ();
1243 *buf = event->data ();
1248 AlsaAudioBackend::midi_event_put (
1250 pframes_t timestamp,
1251 const uint8_t* buffer, size_t size)
1253 assert (buffer && port_buffer);
1254 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1255 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1256 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1257 (pframes_t)dst.back ()->timestamp (), timestamp);
1260 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1265 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1267 assert (port_buffer);
1268 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1272 AlsaAudioBackend::midi_clear (void* port_buffer)
1274 assert (port_buffer);
1275 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1283 AlsaAudioBackend::can_monitor_input () const
1289 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1295 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1301 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1306 /* Latency management */
1309 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1311 if (!valid_port (port)) {
1312 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1314 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1318 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1320 if (!valid_port (port)) {
1321 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1327 return static_cast<AlsaPort*>(port)->latency_range (for_playback);
1330 /* Discovering physical ports */
1333 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1335 if (!valid_port (port)) {
1336 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1339 return static_cast<AlsaPort*>(port)->is_physical ();
1343 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1345 for (size_t i = 0; i < _ports.size (); ++i) {
1346 AlsaPort* port = _ports[i];
1347 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1348 port_names.push_back (port->name ());
1354 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1356 for (size_t i = 0; i < _ports.size (); ++i) {
1357 AlsaPort* port = _ports[i];
1358 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1359 port_names.push_back (port->name ());
1365 AlsaAudioBackend::n_physical_outputs () const
1369 for (size_t i = 0; i < _ports.size (); ++i) {
1370 AlsaPort* port = _ports[i];
1371 if (port->is_output () && port->is_physical ()) {
1372 switch (port->type ()) {
1373 case DataType::AUDIO: ++n_audio; break;
1374 case DataType::MIDI: ++n_midi; break;
1380 cc.set (DataType::AUDIO, n_audio);
1381 cc.set (DataType::MIDI, n_midi);
1386 AlsaAudioBackend::n_physical_inputs () const
1390 for (size_t i = 0; i < _ports.size (); ++i) {
1391 AlsaPort* port = _ports[i];
1392 if (port->is_input () && port->is_physical ()) {
1393 switch (port->type ()) {
1394 case DataType::AUDIO: ++n_audio; break;
1395 case DataType::MIDI: ++n_midi; break;
1401 cc.set (DataType::AUDIO, n_audio);
1402 cc.set (DataType::MIDI, n_midi);
1406 /* Getting access to the data buffer for a port */
1409 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1412 assert (valid_port (port));
1413 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1416 /* Engine Process */
1418 AlsaAudioBackend::main_process_thread ()
1420 AudioEngine::thread_init_callback (this);
1422 _processed_samples = 0;
1424 uint64_t clock1, clock2;
1425 _pcmi->pcm_start ();
1426 int no_proc_errors = 0;
1427 const int bailout = 2 * _samplerate / _samples_per_period;
1428 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1430 manager.registration_callback();
1431 manager.graph_order_callback();
1437 if (_freewheeling != _freewheel) {
1438 _freewheel = _freewheeling;
1439 engine.freewheel_callback (_freewheel);
1443 nr = _pcmi->pcm_wait ();
1445 if (_pcmi->state () > 0) {
1449 if (_pcmi->state () < 0) {
1450 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1453 if (no_proc_errors > bailout) {
1456 _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."),
1462 while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) {
1464 clock1 = g_get_monotonic_time();
1467 _pcmi->capt_init (_samples_per_period);
1468 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1469 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1471 _pcmi->capt_done (_samples_per_period);
1473 /* de-queue incoming midi*/
1475 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1476 assert (_rmidi_in.size() > i);
1477 AlsaMidiIn *rm = _rmidi_in.at(i);
1478 void *bptr = (*it)->get_buffer(0);
1480 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1481 size_t size = sizeof(data);
1483 while (rm->recv_event (time, data, size)) {
1484 midi_event_put(bptr, time, data, size);
1485 size = sizeof(data);
1487 rm->sync_time (clock1);
1490 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1491 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1494 /* call engine process callback */
1495 _last_process_start = g_get_monotonic_time();
1496 if (engine.process_callback (_samples_per_period)) {
1502 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1503 static_cast<AlsaMidiPort*>(*it)->next_period();
1506 /* queue outgoing midi */
1508 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1509 assert (_rmidi_out.size() > i);
1510 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
1511 AlsaMidiOut *rm = _rmidi_out.at(i);
1512 rm->sync_time (clock1);
1513 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1514 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1518 /* write back audio */
1520 _pcmi->play_init (_samples_per_period);
1521 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1522 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1524 for (; i < _pcmi->nplay (); ++i) {
1525 _pcmi->clear_chan (i, _samples_per_period);
1527 _pcmi->play_done (_samples_per_period);
1528 nr -= _samples_per_period;
1529 _processed_samples += _samples_per_period;
1531 /* calculate DSP load */
1532 clock2 = g_get_monotonic_time();
1533 const int64_t elapsed_time = clock2 - clock1;
1534 _dsp_load = elapsed_time / (float) nomial_time;
1536 const double ps = 1e3 * _samples_per_period / elapsed_time;
1537 // low pass filter, The time-constant should really be
1538 // 1.0 - e^(-2.0 * π * v / SR);
1539 // with v = _samples_per_period / N, and SR = _samples_per_period;
1540 _process_speed_samples_per_ms = _process_speed_samples_per_ms + .05 * (ps - _process_speed_samples_per_ms) + 1e-12;
1543 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1546 fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n",
1547 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1553 // zero audio input buffers
1554 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1555 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1558 clock1 = g_get_monotonic_time();
1560 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1561 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1562 AlsaMidiIn *rm = _rmidi_in.at(i);
1563 void *bptr = (*it)->get_buffer(0);
1564 midi_clear(bptr); // zero midi buffer
1566 // TODO add an API call for this.
1568 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1569 size_t size = sizeof(data);
1570 while (rm->recv_event (time, data, size)) {
1571 ; // discard midi-data from HW.
1573 rm->sync_time (clock1);
1576 _last_process_start = 0;
1577 if (engine.process_callback (_samples_per_period)) {
1583 // drop all outgoing MIDI messages
1584 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1585 void *bptr = (*it)->get_buffer(0);
1590 Glib::usleep (100); // don't hog cpu
1593 bool connections_changed = false;
1594 bool ports_changed = false;
1595 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1596 if (_port_change_flag) {
1597 ports_changed = true;
1598 _port_change_flag = false;
1600 if (!_port_connection_queue.empty ()) {
1601 connections_changed = true;
1603 while (!_port_connection_queue.empty ()) {
1604 PortConnectData *c = _port_connection_queue.back ();
1605 manager.connect_callback (c->a, c->b, c->c);
1606 _port_connection_queue.pop_back ();
1609 pthread_mutex_unlock (&_port_callback_mutex);
1611 if (ports_changed) {
1612 manager.registration_callback();
1614 if (connections_changed) {
1615 manager.graph_order_callback();
1617 if (connections_changed || ports_changed) {
1618 engine.latency_callback(false);
1619 engine.latency_callback(true);
1626 engine.halted_callback("ALSA I/O error.");
1632 /******************************************************************************/
1634 static boost::shared_ptr<AlsaAudioBackend> _instance;
1636 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1637 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1638 static int deinstantiate ();
1639 static bool already_configured ();
1640 static bool available ();
1642 static ARDOUR::AudioBackendInfo _descriptor = {
1651 static boost::shared_ptr<AudioBackend>
1652 backend_factory (AudioEngine& e)
1655 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1661 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1663 s_instance_name = arg1;
1675 already_configured ()
1686 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1688 return &_descriptor;
1692 /******************************************************************************/
1693 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1698 _capture_latency_range.min = 0;
1699 _capture_latency_range.max = 0;
1700 _playback_latency_range.min = 0;
1701 _playback_latency_range.max = 0;
1704 AlsaPort::~AlsaPort () {
1709 int AlsaPort::connect (AlsaPort *port)
1712 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1716 if (type () != port->type ()) {
1717 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
1721 if (is_output () && port->is_output ()) {
1722 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
1726 if (is_input () && port->is_input ()) {
1727 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
1732 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
1736 if (is_connected (port)) {
1737 #if 0 // don't bother to warn about this for now. just ignore it
1738 PBD::error << _("AlsaPort::connect (): ports are already connected:")
1739 << " (" << name () << ") -> (" << port->name () << ")"
1745 _connect (port, true);
1750 void AlsaPort::_connect (AlsaPort *port, bool callback)
1752 _connections.push_back (port);
1754 port->_connect (this, false);
1755 _alsa_backend.port_connect_callback (name(), port->name(), true);
1759 int AlsaPort::disconnect (AlsaPort *port)
1762 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
1766 if (!is_connected (port)) {
1767 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
1768 << " (" << name () << ") -> (" << port->name () << ")"
1772 _disconnect (port, true);
1776 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
1778 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1780 assert (it != _connections.end ());
1782 _connections.erase (it);
1785 port->_disconnect (this, false);
1786 _alsa_backend.port_connect_callback (name(), port->name(), false);
1791 void AlsaPort::disconnect_all ()
1793 while (!_connections.empty ()) {
1794 _connections.back ()->_disconnect (this, false);
1795 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1796 _connections.pop_back ();
1801 AlsaPort::is_connected (const AlsaPort *port) const
1803 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1806 bool AlsaPort::is_physically_connected () const
1808 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1809 if ((*it)->is_physical ()) {
1816 /******************************************************************************/
1818 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1819 : AlsaPort (b, name, flags)
1821 memset (_buffer, 0, sizeof (_buffer));
1822 mlock(_buffer, sizeof (_buffer));
1825 AlsaAudioPort::~AlsaAudioPort () { }
1827 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
1830 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
1831 if (it == get_connections ().end ()) {
1832 memset (_buffer, 0, n_samples * sizeof (Sample));
1834 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
1835 assert (source && source->is_output ());
1836 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1837 while (++it != get_connections ().end ()) {
1838 source = static_cast<const AlsaAudioPort*>(*it);
1839 assert (source && source->is_output ());
1840 Sample* dst = buffer ();
1841 const Sample* src = source->const_buffer ();
1842 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1852 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1853 : AlsaPort (b, name, flags)
1857 _buffer[0].clear ();
1858 _buffer[1].clear ();
1861 AlsaMidiPort::~AlsaMidiPort () { }
1863 struct MidiEventSorter {
1864 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
1869 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
1872 (_buffer[_bufperiod]).clear ();
1873 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
1874 i != get_connections ().end ();
1876 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
1877 for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1878 (_buffer[_bufperiod]).push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
1881 std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
1883 return &(_buffer[_bufperiod]);
1886 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1888 , _timestamp (timestamp)
1892 _data = (uint8_t*) malloc (size);
1893 memcpy (_data, data, size);
1897 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
1898 : _size (other.size ())
1899 , _timestamp (other.timestamp ())
1902 if (other.size () && other.const_data ()) {
1903 _data = (uint8_t*) malloc (other.size ());
1904 memcpy (_data, other.const_data (), other.size ());
1908 AlsaMidiEvent::~AlsaMidiEvent () {