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)
55 , _midi_driver_option(_("None"))
56 , _device_reservation(0)
58 , _samples_per_period (1024)
59 , _periods_per_cycle (2)
62 , _systemic_audio_input_latency (0)
63 , _systemic_audio_output_latency (0)
65 , _processed_samples (0)
66 , _port_change_flag (false)
68 _instance_name = s_instance_name;
69 pthread_mutex_init (&_port_callback_mutex, 0);
72 AlsaAudioBackend::~AlsaAudioBackend ()
74 pthread_mutex_destroy (&_port_callback_mutex);
77 /* AUDIOBACKEND API */
80 AlsaAudioBackend::name () const
86 AlsaAudioBackend::is_realtime () const
91 std::vector<AudioBackend::DeviceStatus>
92 AlsaAudioBackend::enumerate_devices () const
94 _audio_device_status.clear();
95 std::map<std::string, std::string> devices;
96 get_alsa_audio_device_names(devices);
97 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
98 if (_audio_device == "") _audio_device = i->first;
99 _audio_device_status.push_back (DeviceStatus (i->first, true));
101 return _audio_device_status;
105 AlsaAudioBackend::reservation_stdout (std::string d, size_t /* s */)
107 if (d.substr(0, 19) == "Acquired audio-card") {
108 _reservation_succeeded = true;
113 AlsaAudioBackend::release_device()
115 _reservation_connection.drop_connections();
116 ARDOUR::SystemExec * tmp = _device_reservation;
117 _device_reservation = 0;
122 AlsaAudioBackend::acquire_device(const char* device_name)
124 /* This is quick hack, ideally we'll link against libdbus and implement a dbus-listener
125 * that owns the device. here we try to get away by just requesting it and then block it...
126 * (pulseaudio periodically checks anyway)
128 * dbus-send --session --print-reply --type=method_call --dest=org.freedesktop.ReserveDevice1.Audio2 /org/freedesktop/ReserveDevice1/Audio2 org.freedesktop.ReserveDevice1.RequestRelease int32:4
129 * -> should not return 'boolean false'
131 int device_number = card_to_num(device_name);
132 if (device_number < 0) return false;
134 assert(_device_reservation == 0);
135 _reservation_succeeded = false;
137 std::string request_device_exe;
138 if (!PBD::find_file (
139 PBD::Searchpath(Glib::build_filename(ARDOUR::ardour_dll_directory(), "ardouralsautil")
140 + G_SEARCHPATH_SEPARATOR_S + ARDOUR::ardour_dll_directory()),
141 "ardour-request-device", request_device_exe))
143 PBD::warning << "ardour-request-device binary was not found..'" << endmsg;
150 argp=(char**) calloc(5,sizeof(char*));
151 argp[0] = strdup(request_device_exe.c_str());
152 argp[1] = strdup("-P");
153 snprintf(tmp, sizeof(tmp), "%d", getpid());
154 argp[2] = strdup(tmp);
155 snprintf(tmp, sizeof(tmp), "Audio%d", device_number);
156 argp[3] = strdup(tmp);
159 _device_reservation = new ARDOUR::SystemExec(request_device_exe, argp);
160 _device_reservation->ReadStdout.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::reservation_stdout, this, _1 ,_2));
161 _device_reservation->Terminated.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::release_device, this));
162 if (_device_reservation->start(0)) {
163 PBD::warning << _("AlsaAudioBackend: Device Request failed.") << endmsg;
168 // wait to check if reservation suceeded.
169 int timeout = 500; // 5 sec
170 while (_device_reservation && !_reservation_succeeded && --timeout > 0) {
173 if (timeout == 0 || !_reservation_succeeded) {
174 PBD::warning << _("AlsaAudioBackend: Device Reservation failed.") << endmsg;
182 AlsaAudioBackend::available_sample_rates (const std::string&) const
184 std::vector<float> sr;
185 sr.push_back (8000.0);
186 sr.push_back (22050.0);
187 sr.push_back (24000.0);
188 sr.push_back (44100.0);
189 sr.push_back (48000.0);
190 sr.push_back (88200.0);
191 sr.push_back (96000.0);
192 sr.push_back (176400.0);
193 sr.push_back (192000.0);
197 std::vector<uint32_t>
198 AlsaAudioBackend::available_buffer_sizes (const std::string&) const
200 std::vector<uint32_t> bs;
214 AlsaAudioBackend::available_input_channel_count (const std::string&) const
216 return 128; // TODO query current device
220 AlsaAudioBackend::available_output_channel_count (const std::string&) const
222 return 128; // TODO query current device
226 AlsaAudioBackend::can_change_sample_rate_when_running () const
232 AlsaAudioBackend::can_change_buffer_size_when_running () const
234 return false; // why not? :)
238 AlsaAudioBackend::set_device_name (const std::string& d)
245 AlsaAudioBackend::set_sample_rate (float sr)
247 if (sr <= 0) { return -1; }
249 engine.sample_rate_change (sr);
254 AlsaAudioBackend::set_buffer_size (uint32_t bs)
256 if (bs <= 0 || bs >= _max_buffer_size) {
262 _samples_per_period = bs;
263 engine.buffer_size_change (bs);
268 AlsaAudioBackend::set_interleaved (bool yn)
270 if (!yn) { return 0; }
275 AlsaAudioBackend::set_input_channels (uint32_t cc)
282 AlsaAudioBackend::set_output_channels (uint32_t cc)
289 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
291 _systemic_audio_input_latency = sl;
296 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
298 _systemic_audio_output_latency = sl;
303 AlsaAudioBackend::set_systemic_midi_input_latency (std::string const device, uint32_t sl)
305 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
307 nfo->systemic_input_latency = sl;
312 AlsaAudioBackend::set_systemic_midi_output_latency (std::string const device, uint32_t sl)
314 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
316 nfo->systemic_output_latency = sl;
320 /* Retrieving parameters */
322 AlsaAudioBackend::device_name () const
324 return _audio_device;
328 AlsaAudioBackend::sample_rate () const
334 AlsaAudioBackend::buffer_size () const
336 return _samples_per_period;
340 AlsaAudioBackend::interleaved () const
346 AlsaAudioBackend::input_channels () const
352 AlsaAudioBackend::output_channels () const
358 AlsaAudioBackend::systemic_input_latency () const
360 return _systemic_audio_input_latency;
364 AlsaAudioBackend::systemic_output_latency () const
366 return _systemic_audio_output_latency;
370 AlsaAudioBackend::systemic_midi_input_latency (std::string const device) const
372 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
374 return nfo->systemic_input_latency;
378 AlsaAudioBackend::systemic_midi_output_latency (std::string const device) const
380 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
382 return nfo->systemic_output_latency;
386 struct AlsaAudioBackend::AlsaMidiDeviceInfo *
387 AlsaAudioBackend::midi_device_info(std::string const name) const {
388 for (std::map<std::string, struct AlsaMidiDeviceInfo*>::const_iterator i = _midi_devices.begin (); i != _midi_devices.end(); ++i) {
389 if (i->first == name) {
394 assert(_midi_driver_option != _("None"));
396 std::map<std::string, std::string> devices;
397 if (_midi_driver_option == _("ALSA raw devices")) {
398 get_alsa_rawmidi_device_names(devices);
400 get_alsa_sequencer_names (devices);
403 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
404 if (i->first == name) {
405 _midi_devices[name] = new AlsaMidiDeviceInfo();
406 return _midi_devices[name];
412 std::vector<std::string>
413 AlsaAudioBackend::enumerate_midi_options () const
415 if (_midi_options.empty()) {
416 _midi_options.push_back (_("ALSA raw devices"));
417 _midi_options.push_back (_("ALSA sequencer"));
418 _midi_options.push_back (_("None"));
420 return _midi_options;
423 std::vector<AudioBackend::DeviceStatus>
424 AlsaAudioBackend::enumerate_midi_devices () const
426 _midi_device_status.clear();
427 std::map<std::string, std::string> devices;
429 if (_midi_driver_option == _("ALSA raw devices")) {
430 get_alsa_rawmidi_device_names (devices);
432 else if (_midi_driver_option == _("ALSA sequencer")) {
433 get_alsa_sequencer_names (devices);
436 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
437 _midi_device_status.push_back (DeviceStatus (i->first, true));
439 return _midi_device_status;
443 AlsaAudioBackend::set_midi_option (const std::string& opt)
445 if (opt != _("None") && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
448 _midi_driver_option = opt;
453 AlsaAudioBackend::midi_option () const
455 return _midi_driver_option;
459 AlsaAudioBackend::set_midi_device_enabled (std::string const device, bool enable)
461 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
463 nfo->enabled = enable;
468 AlsaAudioBackend::midi_device_enabled (std::string const device) const
470 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
471 if (!nfo) return false;
477 static void * pthread_process (void *arg)
479 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
480 d->main_process_thread ();
486 AlsaAudioBackend::_start (bool for_latency_measurement)
488 if (!_active && _run) {
489 // recover from 'halted', reap threads
493 if (_active || _run) {
494 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
499 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
500 _system_inputs.clear();
501 _system_outputs.clear();
502 _system_midi_in.clear();
503 _system_midi_out.clear();
507 /* reset internal state */
509 _freewheeling = false;
511 _last_process_start = 0;
515 assert(_rmidi_in.size() == 0);
516 assert(_rmidi_out.size() == 0);
519 std::string alsa_device;
520 std::map<std::string, std::string> devices;
521 get_alsa_audio_device_names(devices);
522 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
523 if (i->first == _audio_device) {
524 alsa_device = i->second;
529 acquire_device(alsa_device.c_str());
530 _pcmi = new Alsa_pcmi (alsa_device.c_str(), alsa_device.c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
531 switch (_pcmi->state ()) {
532 case 0: /* OK */ break;
533 case -1: PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg; break;
534 case -2: PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg; break;
535 case -3: PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.") << endmsg; break;
536 case -4: PBD::error << _("AlsaAudioBackend: cannot set requested period size.") << endmsg; break;
537 case -5: PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.") << endmsg; break;
538 case -6: PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg; break;
539 default: PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg; break;
541 if (_pcmi->state ()) {
542 delete _pcmi; _pcmi = 0;
551 if (_n_outputs != _pcmi->nplay ()) {
552 if (_n_outputs == 0) {
553 _n_outputs = _pcmi->nplay ();
555 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
557 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
560 if (_n_inputs != _pcmi->ncapt ()) {
561 if (_n_inputs == 0) {
562 _n_inputs = _pcmi->ncapt ();
564 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
566 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
569 if (_pcmi->fsize() != _samples_per_period) {
570 _samples_per_period = _pcmi->fsize();
571 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
574 if (_pcmi->fsamp() != _samplerate) {
575 _samplerate = _pcmi->fsamp();
576 engine.sample_rate_change (_samplerate);
577 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
580 _measure_latency = for_latency_measurement;
582 register_system_midi_ports();
584 if (register_system_audio_ports()) {
585 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
586 delete _pcmi; _pcmi = 0;
591 engine.sample_rate_change (_samplerate);
592 engine.buffer_size_change (_samples_per_period);
594 if (engine.reestablish_ports ()) {
595 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
596 delete _pcmi; _pcmi = 0;
601 engine.reconnect_ports ();
603 _port_change_flag = false;
605 if (_realtime_pthread_create (SCHED_FIFO, -20, 100000,
606 &_main_thread, pthread_process, this))
608 if (pthread_create (&_main_thread, NULL, pthread_process, this))
610 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
611 delete _pcmi; _pcmi = 0;
616 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
621 while (!_active && --timeout > 0) { Glib::usleep (1000); }
623 if (timeout == 0 || !_active) {
624 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
625 delete _pcmi; _pcmi = 0;
635 AlsaAudioBackend::stop ()
643 if (pthread_join (_main_thread, &status)) {
644 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
648 while (!_rmidi_out.empty ()) {
649 AlsaMidiIO *m = _rmidi_out.back ();
651 _rmidi_out.pop_back ();
654 while (!_rmidi_in.empty ()) {
655 AlsaMidiIO *m = _rmidi_in.back ();
657 _rmidi_in.pop_back ();
662 delete _pcmi; _pcmi = 0;
665 return (_active == false) ? 0 : -1;
669 AlsaAudioBackend::freewheel (bool onoff)
671 _freewheeling = onoff;
676 AlsaAudioBackend::dsp_load () const
678 return std::min(100.f, 100.f * _dsp_load);
682 AlsaAudioBackend::raw_buffer_size (DataType t)
685 case DataType::AUDIO:
686 return _samples_per_period * sizeof(Sample);
688 return _max_buffer_size; // XXX not really limited
695 AlsaAudioBackend::sample_time ()
697 return _processed_samples;
701 AlsaAudioBackend::sample_time_at_cycle_start ()
703 return _processed_samples;
707 AlsaAudioBackend::samples_since_cycle_start ()
709 if (!_active || !_run || _freewheeling || _freewheel) {
712 if (_last_process_start == 0) {
716 const int64_t elapsed_time_us = g_get_monotonic_time() - _last_process_start;
717 return std::max((pframes_t)0, (pframes_t)rint(1e-6 * elapsed_time_us * _samplerate));
722 AlsaAudioBackend::alsa_process_thread (void *arg)
724 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
725 boost::function<void ()> f = td->f;
732 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
736 size_t stacksize = 100000;
738 ThreadData* td = new ThreadData (this, func, stacksize);
740 if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
741 &thread_id, alsa_process_thread, td)) {
742 pthread_attr_init (&attr);
743 pthread_attr_setstacksize (&attr, stacksize);
744 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
745 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
746 pthread_attr_destroy (&attr);
749 pthread_attr_destroy (&attr);
752 _threads.push_back (thread_id);
757 AlsaAudioBackend::join_process_threads ()
761 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
764 if (pthread_join (*i, &status)) {
765 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
774 AlsaAudioBackend::in_process_thread ()
776 if (pthread_equal (_main_thread, pthread_self()) != 0) {
780 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
782 if (pthread_equal (*i, pthread_self ()) != 0) {
790 AlsaAudioBackend::process_thread_count ()
792 return _threads.size ();
796 AlsaAudioBackend::update_latencies ()
798 // trigger latency callback in RT thread (locked graph)
799 port_connect_add_remove_callback();
805 AlsaAudioBackend::private_handle () const
811 AlsaAudioBackend::my_name () const
813 return _instance_name;
817 AlsaAudioBackend::available () const
819 return _run && _active;
823 AlsaAudioBackend::port_name_size () const
829 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
831 if (!valid_port (port)) {
832 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
835 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
839 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
841 if (!valid_port (port)) {
842 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
843 return std::string ();
845 return static_cast<AlsaPort*>(port)->name ();
848 PortEngine::PortHandle
849 AlsaAudioBackend::get_port_by_name (const std::string& name) const
851 PortHandle port = (PortHandle) find_port (name);
856 AlsaAudioBackend::get_ports (
857 const std::string& port_name_pattern,
858 DataType type, PortFlags flags,
859 std::vector<std::string>& port_names) const
863 bool use_regexp = false;
864 if (port_name_pattern.size () > 0) {
865 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
869 for (size_t i = 0; i < _ports.size (); ++i) {
870 AlsaPort* port = _ports[i];
871 if ((port->type () == type) && (port->flags () & flags)) {
872 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
873 port_names.push_back (port->name ());
879 regfree (&port_regex);
885 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
887 if (!valid_port (port)) {
888 return DataType::NIL;
890 return static_cast<AlsaPort*>(port)->type ();
893 PortEngine::PortHandle
894 AlsaAudioBackend::register_port (
895 const std::string& name,
896 ARDOUR::DataType type,
897 ARDOUR::PortFlags flags)
899 if (name.size () == 0) { return 0; }
900 if (flags & IsPhysical) { return 0; }
901 return add_port (_instance_name + ":" + name, type, flags);
904 PortEngine::PortHandle
905 AlsaAudioBackend::add_port (
906 const std::string& name,
907 ARDOUR::DataType type,
908 ARDOUR::PortFlags flags)
910 assert(name.size ());
911 if (find_port (name)) {
912 PBD::error << _("AlsaBackend::register_port: Port already exists:")
913 << " (" << name << ")" << endmsg;
916 AlsaPort* port = NULL;
918 case DataType::AUDIO:
919 port = new AlsaAudioPort (*this, name, flags);
922 port = new AlsaMidiPort (*this, name, flags);
925 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
929 _ports.push_back (port);
935 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
940 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
941 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
942 if (i == _ports.end ()) {
943 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
946 disconnect_all(port_handle);
952 AlsaAudioBackend::register_system_audio_ports()
956 const int a_ins = _n_inputs > 0 ? _n_inputs : 2;
957 const int a_out = _n_outputs > 0 ? _n_outputs : 2;
960 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_input_latency);
961 for (int i = 1; i <= a_ins; ++i) {
963 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
964 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
966 set_latency_range (p, false, lr);
967 _system_inputs.push_back(static_cast<AlsaPort*>(p));
970 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_output_latency);
971 for (int i = 1; i <= a_out; ++i) {
973 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
974 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
976 set_latency_range (p, true, lr);
977 _system_outputs.push_back(static_cast<AlsaPort*>(p));
983 AlsaAudioBackend::register_system_midi_ports()
985 std::map<std::string, std::string> devices;
989 if (_midi_driver_option == _("None")) {
991 } else if (_midi_driver_option == _("ALSA raw devices")) {
992 get_alsa_rawmidi_device_names(devices);
994 get_alsa_sequencer_names (devices);
997 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
998 struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first);
1000 if (!nfo->enabled) continue;
1003 if (_midi_driver_option == _("ALSA raw devices")) {
1004 mout = new AlsaRawMidiOut (i->second.c_str());
1006 mout = new AlsaSeqMidiOut (i->second.c_str());
1009 if (mout->state ()) {
1010 PBD::warning << string_compose (
1011 _("AlsaMidiOut: failed to open midi device '%1'."), i->second)
1015 mout->setup_timing(_samples_per_period, _samplerate);
1016 mout->sync_time (g_get_monotonic_time());
1017 if (mout->start ()) {
1018 PBD::warning << string_compose (
1019 _("AlsaMidiOut: failed to start midi device '%1'."), i->second)
1024 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", ++midi_ins);
1025 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1031 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
1032 set_latency_range (p, false, lr);
1033 static_cast<AlsaMidiPort*>(p)->set_n_periods(2);
1034 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
1035 _rmidi_out.push_back (mout);
1040 if (_midi_driver_option == _("ALSA raw devices")) {
1041 midin = new AlsaRawMidiIn (i->second.c_str());
1043 midin = new AlsaSeqMidiIn (i->second.c_str());
1046 if (midin->state ()) {
1047 PBD::warning << string_compose (
1048 _("AlsaMidiIn: failed to open midi device '%1'."), i->second)
1052 midin->setup_timing(_samples_per_period, _samplerate);
1053 midin->sync_time (g_get_monotonic_time());
1054 if (midin->start ()) {
1055 PBD::warning << string_compose (
1056 _("AlsaMidiIn: failed to start midi device '%1'."), i->second)
1061 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", ++midi_outs);
1062 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1069 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
1070 set_latency_range (p, false, lr);
1071 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
1072 _rmidi_in.push_back (midin);
1080 AlsaAudioBackend::unregister_ports (bool system_only)
1083 _system_inputs.clear();
1084 _system_outputs.clear();
1085 _system_midi_in.clear();
1086 _system_midi_out.clear();
1087 while (i < _ports.size ()) {
1088 AlsaPort* port = _ports[i];
1089 if (! system_only || (port->is_physical () && port->is_terminal ())) {
1090 port->disconnect_all ();
1092 _ports.erase (_ports.begin() + i);
1100 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
1102 AlsaPort* src_port = find_port (src);
1103 AlsaPort* dst_port = find_port (dst);
1106 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
1107 << " (" << src <<")" << endmsg;
1111 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
1112 << " (" << dst <<")" << endmsg;
1115 return src_port->connect (dst_port);
1119 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
1121 AlsaPort* src_port = find_port (src);
1122 AlsaPort* dst_port = find_port (dst);
1124 if (!src_port || !dst_port) {
1125 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1128 return src_port->disconnect (dst_port);
1132 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1134 AlsaPort* dst_port = find_port (dst);
1135 if (!valid_port (src)) {
1136 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1140 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1141 << " (" << dst << ")" << endmsg;
1144 return static_cast<AlsaPort*>(src)->connect (dst_port);
1148 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1150 AlsaPort* dst_port = find_port (dst);
1151 if (!valid_port (src) || !dst_port) {
1152 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1155 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1159 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1161 if (!valid_port (port)) {
1162 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1165 static_cast<AlsaPort*>(port)->disconnect_all ();
1170 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1172 if (!valid_port (port)) {
1173 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1176 return static_cast<AlsaPort*>(port)->is_connected ();
1180 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1182 AlsaPort* dst_port = find_port (dst);
1183 if (!valid_port (src) || !dst_port) {
1184 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1187 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1191 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1193 if (!valid_port (port)) {
1194 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1197 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1201 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1203 if (!valid_port (port)) {
1204 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1208 assert (0 == names.size ());
1210 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1212 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1213 names.push_back ((*i)->name ());
1216 return (int)names.size ();
1221 AlsaAudioBackend::midi_event_get (
1222 pframes_t& timestamp,
1223 size_t& size, uint8_t** buf, void* port_buffer,
1224 uint32_t event_index)
1226 assert (buf && port_buffer);
1227 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1228 if (event_index >= source.size ()) {
1231 AlsaMidiEvent * const event = source[event_index].get ();
1233 timestamp = event->timestamp ();
1234 size = event->size ();
1235 *buf = event->data ();
1240 AlsaAudioBackend::midi_event_put (
1242 pframes_t timestamp,
1243 const uint8_t* buffer, size_t size)
1245 assert (buffer && port_buffer);
1246 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1247 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1249 // nevermind, ::get_buffer() sorts events
1250 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1251 (pframes_t)dst.back ()->timestamp (), timestamp);
1254 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1259 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1261 assert (port_buffer);
1262 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1266 AlsaAudioBackend::midi_clear (void* port_buffer)
1268 assert (port_buffer);
1269 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1277 AlsaAudioBackend::can_monitor_input () const
1283 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1289 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1295 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1300 /* Latency management */
1303 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1305 if (!valid_port (port)) {
1306 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1308 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1312 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1315 if (!valid_port (port)) {
1316 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1321 AlsaPort *p = static_cast<AlsaPort*>(port);
1324 r = p->latency_range (for_playback);
1325 if (p->is_physical() && p->is_terminal()) {
1326 if (p->is_input() && for_playback) {
1327 r.min += _samples_per_period;
1328 r.max += _samples_per_period;
1330 if (p->is_output() && !for_playback) {
1331 r.min += _samples_per_period;
1332 r.max += _samples_per_period;
1338 /* Discovering physical ports */
1341 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1343 if (!valid_port (port)) {
1344 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1347 return static_cast<AlsaPort*>(port)->is_physical ();
1351 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1353 for (size_t i = 0; i < _ports.size (); ++i) {
1354 AlsaPort* port = _ports[i];
1355 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1356 port_names.push_back (port->name ());
1362 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1364 for (size_t i = 0; i < _ports.size (); ++i) {
1365 AlsaPort* port = _ports[i];
1366 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1367 port_names.push_back (port->name ());
1373 AlsaAudioBackend::n_physical_outputs () const
1377 for (size_t i = 0; i < _ports.size (); ++i) {
1378 AlsaPort* port = _ports[i];
1379 if (port->is_output () && port->is_physical ()) {
1380 switch (port->type ()) {
1381 case DataType::AUDIO: ++n_audio; break;
1382 case DataType::MIDI: ++n_midi; break;
1388 cc.set (DataType::AUDIO, n_audio);
1389 cc.set (DataType::MIDI, n_midi);
1394 AlsaAudioBackend::n_physical_inputs () const
1398 for (size_t i = 0; i < _ports.size (); ++i) {
1399 AlsaPort* port = _ports[i];
1400 if (port->is_input () && port->is_physical ()) {
1401 switch (port->type ()) {
1402 case DataType::AUDIO: ++n_audio; break;
1403 case DataType::MIDI: ++n_midi; break;
1409 cc.set (DataType::AUDIO, n_audio);
1410 cc.set (DataType::MIDI, n_midi);
1414 /* Getting access to the data buffer for a port */
1417 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1420 assert (valid_port (port));
1421 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1424 /* Engine Process */
1426 AlsaAudioBackend::main_process_thread ()
1428 AudioEngine::thread_init_callback (this);
1430 _processed_samples = 0;
1432 uint64_t clock1, clock2;
1433 _pcmi->pcm_start ();
1434 int no_proc_errors = 0;
1435 const int bailout = 2 * _samplerate / _samples_per_period;
1436 const int64_t nominal_time = 1e6 * _samples_per_period / _samplerate;
1438 manager.registration_callback();
1439 manager.graph_order_callback();
1445 if (_freewheeling != _freewheel) {
1446 _freewheel = _freewheeling;
1447 engine.freewheel_callback (_freewheel);
1451 nr = _pcmi->pcm_wait ();
1453 if (_pcmi->state () > 0) {
1457 if (_pcmi->state () < 0) {
1458 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1461 if (no_proc_errors > bailout) {
1464 _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."),
1470 while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) {
1472 clock1 = g_get_monotonic_time();
1475 _pcmi->capt_init (_samples_per_period);
1476 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1477 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1479 _pcmi->capt_done (_samples_per_period);
1481 /* de-queue incoming midi*/
1483 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1484 assert (_rmidi_in.size() > i);
1485 AlsaMidiIn *rm = _rmidi_in.at(i);
1486 void *bptr = (*it)->get_buffer(0);
1488 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1489 size_t size = sizeof(data);
1491 while (rm->recv_event (time, data, size)) {
1492 midi_event_put(bptr, time, data, size);
1493 size = sizeof(data);
1495 rm->sync_time (clock1);
1498 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1499 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1502 /* call engine process callback */
1503 _last_process_start = g_get_monotonic_time();
1504 if (engine.process_callback (_samples_per_period)) {
1510 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1511 static_cast<AlsaMidiPort*>(*it)->next_period();
1514 /* queue outgoing midi */
1516 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1517 assert (_rmidi_out.size() > i);
1518 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
1519 AlsaMidiOut *rm = _rmidi_out.at(i);
1520 rm->sync_time (clock1);
1521 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1522 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1526 /* write back audio */
1528 _pcmi->play_init (_samples_per_period);
1529 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1530 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1532 for (; i < _pcmi->nplay (); ++i) {
1533 _pcmi->clear_chan (i, _samples_per_period);
1535 _pcmi->play_done (_samples_per_period);
1536 nr -= _samples_per_period;
1537 _processed_samples += _samples_per_period;
1539 /* calculate DSP load */
1540 clock2 = g_get_monotonic_time();
1541 const int64_t elapsed_time = clock2 - clock1;
1543 const float load = elapsed_time / (float) nominal_time;
1544 if (load > _dsp_load) {
1547 const float a = .2 * _samples_per_period / _samplerate;
1548 _dsp_load = _dsp_load + a * (load - _dsp_load) + 1e-12;
1552 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1555 fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n",
1556 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1562 // zero audio input buffers
1563 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1564 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1567 clock1 = g_get_monotonic_time();
1569 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1570 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1571 AlsaMidiIn *rm = _rmidi_in.at(i);
1572 void *bptr = (*it)->get_buffer(0);
1573 midi_clear(bptr); // zero midi buffer
1575 // TODO add an API call for this.
1577 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1578 size_t size = sizeof(data);
1579 while (rm->recv_event (time, data, size)) {
1580 ; // discard midi-data from HW.
1582 rm->sync_time (clock1);
1585 _last_process_start = 0;
1586 if (engine.process_callback (_samples_per_period)) {
1592 // drop all outgoing MIDI messages
1593 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1594 void *bptr = (*it)->get_buffer(0);
1599 Glib::usleep (100); // don't hog cpu
1602 bool connections_changed = false;
1603 bool ports_changed = false;
1604 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1605 if (_port_change_flag) {
1606 ports_changed = true;
1607 _port_change_flag = false;
1609 if (!_port_connection_queue.empty ()) {
1610 connections_changed = true;
1612 while (!_port_connection_queue.empty ()) {
1613 PortConnectData *c = _port_connection_queue.back ();
1614 manager.connect_callback (c->a, c->b, c->c);
1615 _port_connection_queue.pop_back ();
1618 pthread_mutex_unlock (&_port_callback_mutex);
1620 if (ports_changed) {
1621 manager.registration_callback();
1623 if (connections_changed) {
1624 manager.graph_order_callback();
1626 if (connections_changed || ports_changed) {
1627 engine.latency_callback(false);
1628 engine.latency_callback(true);
1635 engine.halted_callback("ALSA I/O error.");
1641 /******************************************************************************/
1643 static boost::shared_ptr<AlsaAudioBackend> _instance;
1645 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1646 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1647 static int deinstantiate ();
1648 static bool already_configured ();
1649 static bool available ();
1651 static ARDOUR::AudioBackendInfo _descriptor = {
1660 static boost::shared_ptr<AudioBackend>
1661 backend_factory (AudioEngine& e)
1664 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1670 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1672 s_instance_name = arg1;
1684 already_configured ()
1695 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1697 return &_descriptor;
1701 /******************************************************************************/
1702 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1707 _capture_latency_range.min = 0;
1708 _capture_latency_range.max = 0;
1709 _playback_latency_range.min = 0;
1710 _playback_latency_range.max = 0;
1713 AlsaPort::~AlsaPort () {
1718 int AlsaPort::connect (AlsaPort *port)
1721 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1725 if (type () != port->type ()) {
1726 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
1730 if (is_output () && port->is_output ()) {
1731 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
1735 if (is_input () && port->is_input ()) {
1736 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
1741 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
1745 if (is_connected (port)) {
1746 #if 0 // don't bother to warn about this for now. just ignore it
1747 PBD::error << _("AlsaPort::connect (): ports are already connected:")
1748 << " (" << name () << ") -> (" << port->name () << ")"
1754 _connect (port, true);
1759 void AlsaPort::_connect (AlsaPort *port, bool callback)
1761 _connections.push_back (port);
1763 port->_connect (this, false);
1764 _alsa_backend.port_connect_callback (name(), port->name(), true);
1768 int AlsaPort::disconnect (AlsaPort *port)
1771 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
1775 if (!is_connected (port)) {
1776 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
1777 << " (" << name () << ") -> (" << port->name () << ")"
1781 _disconnect (port, true);
1785 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
1787 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1789 assert (it != _connections.end ());
1791 _connections.erase (it);
1794 port->_disconnect (this, false);
1795 _alsa_backend.port_connect_callback (name(), port->name(), false);
1800 void AlsaPort::disconnect_all ()
1802 while (!_connections.empty ()) {
1803 _connections.back ()->_disconnect (this, false);
1804 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1805 _connections.pop_back ();
1810 AlsaPort::is_connected (const AlsaPort *port) const
1812 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1815 bool AlsaPort::is_physically_connected () const
1817 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1818 if ((*it)->is_physical ()) {
1825 /******************************************************************************/
1827 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1828 : AlsaPort (b, name, flags)
1830 memset (_buffer, 0, sizeof (_buffer));
1831 mlock(_buffer, sizeof (_buffer));
1834 AlsaAudioPort::~AlsaAudioPort () { }
1836 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
1839 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
1840 if (it == get_connections ().end ()) {
1841 memset (_buffer, 0, n_samples * sizeof (Sample));
1843 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
1844 assert (source && source->is_output ());
1845 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1846 while (++it != get_connections ().end ()) {
1847 source = static_cast<const AlsaAudioPort*>(*it);
1848 assert (source && source->is_output ());
1849 Sample* dst = buffer ();
1850 const Sample* src = source->const_buffer ();
1851 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1861 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1862 : AlsaPort (b, name, flags)
1866 _buffer[0].clear ();
1867 _buffer[1].clear ();
1870 AlsaMidiPort::~AlsaMidiPort () { }
1872 struct MidiEventSorter {
1873 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
1878 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
1881 (_buffer[_bufperiod]).clear ();
1882 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
1883 i != get_connections ().end ();
1885 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
1886 for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
1887 (_buffer[_bufperiod]).push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
1890 std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
1892 return &(_buffer[_bufperiod]);
1895 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1897 , _timestamp (timestamp)
1901 _data = (uint8_t*) malloc (size);
1902 memcpy (_data, data, size);
1906 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
1907 : _size (other.size ())
1908 , _timestamp (other.timestamp ())
1911 if (other.size () && other.const_data ()) {
1912 _data = (uint8_t*) malloc (other.size ());
1913 memcpy (_data, other.const_data (), other.size ());
1917 AlsaMidiEvent::~AlsaMidiEvent () {