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 "ardour/port_manager.h"
34 using namespace ARDOUR;
36 static std::string s_instance_name;
37 size_t AlsaAudioBackend::_max_buffer_size = 8192;
39 AlsaAudioBackend::AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info)
40 : AudioBackend (e, info)
43 , _freewheeling (false)
45 , _playback_device("")
47 , _samples_per_period (1024)
48 , _periods_per_cycle (2)
52 , _systemic_input_latency (0)
53 , _systemic_output_latency (0)
54 , _processed_samples (0)
56 _instance_name = s_instance_name;
57 pthread_mutex_init (&_port_callback_mutex, 0);
60 AlsaAudioBackend::~AlsaAudioBackend ()
62 pthread_mutex_destroy (&_port_callback_mutex);
65 /* AUDIOBACKEND API */
68 AlsaAudioBackend::name () const
74 AlsaAudioBackend::is_realtime () const
79 std::vector<AudioBackend::DeviceStatus>
80 AlsaAudioBackend::enumerate_devices () const
82 std::vector<AudioBackend::DeviceStatus> s;
84 snd_ctl_card_info_t *info;
85 snd_ctl_card_info_alloca (&info);
87 // TODO re-use code from libs/backends/jack/jack_utils.cc
88 while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) {
91 std::string devname = "hw:";
92 devname += PBD::to_string (cardnum, std::dec);
94 if (snd_ctl_open (&handle, devname.c_str(), 0) >= 0 && snd_ctl_card_info (handle, info) >= 0) {
95 //string card_name = snd_ctl_card_info_get_name (info);
97 if (snd_ctl_pcm_next_device (handle, &device) >= 0 && device >= 0) {
98 s.push_back (DeviceStatus (devname, true));
100 snd_ctl_close(handle);
107 AlsaAudioBackend::available_sample_rates (const std::string&) const
109 std::vector<float> sr;
110 sr.push_back (8000.0);
111 sr.push_back (22050.0);
112 sr.push_back (24000.0);
113 sr.push_back (44100.0);
114 sr.push_back (48000.0);
115 sr.push_back (88200.0);
116 sr.push_back (96000.0);
117 sr.push_back (176400.0);
118 sr.push_back (192000.0);
122 std::vector<uint32_t>
123 AlsaAudioBackend::available_buffer_sizes (const std::string&) const
125 std::vector<uint32_t> bs;
139 AlsaAudioBackend::available_input_channel_count (const std::string&) const
141 return 128; // TODO query current device
145 AlsaAudioBackend::available_output_channel_count (const std::string&) const
147 return 128; // TODO query current device
151 AlsaAudioBackend::can_change_sample_rate_when_running () const
157 AlsaAudioBackend::can_change_buffer_size_when_running () const
163 AlsaAudioBackend::set_device_name (const std::string& d)
166 _playback_device = d;
171 AlsaAudioBackend::set_sample_rate (float sr)
173 if (sr <= 0) { return -1; }
175 engine.sample_rate_change (sr);
180 AlsaAudioBackend::set_buffer_size (uint32_t bs)
182 if (bs <= 0 || bs >= _max_buffer_size) {
185 _samples_per_period = bs;
186 engine.buffer_size_change (bs);
191 AlsaAudioBackend::set_interleaved (bool yn)
193 if (!yn) { return 0; }
198 AlsaAudioBackend::set_input_channels (uint32_t cc)
205 AlsaAudioBackend::set_output_channels (uint32_t cc)
212 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
214 _systemic_input_latency = sl;
219 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
221 _systemic_output_latency = sl;
225 /* Retrieving parameters */
227 AlsaAudioBackend::device_name () const
229 return _capture_device;
233 AlsaAudioBackend::sample_rate () const
239 AlsaAudioBackend::buffer_size () const
241 return _samples_per_period;
245 AlsaAudioBackend::interleaved () const
251 AlsaAudioBackend::input_channels () const
257 AlsaAudioBackend::output_channels () const
263 AlsaAudioBackend::systemic_input_latency () const
265 return _systemic_input_latency;
269 AlsaAudioBackend::systemic_output_latency () const
271 return _systemic_output_latency;
276 AlsaAudioBackend::enumerate_midi_devices (std::vector<std::string> &m) const
279 while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) {
281 std::string devname = "hw:";
282 devname += PBD::to_string (cardnum, std::dec);
284 if (snd_ctl_open (&handle, devname.c_str(), 0) >= 0) {
286 // TODO iterate over sub-devices
287 if (snd_ctl_rawmidi_next_device (handle, &device) >= 0 && device >= 0) {
288 m.push_back (devname);
290 snd_ctl_close(handle);
295 std::vector<std::string>
296 AlsaAudioBackend::enumerate_midi_options () const
298 std::vector<std::string> m;
299 m.push_back (_("-None-"));
300 enumerate_midi_devices(m);
302 m.push_back (_("-All-"));
308 AlsaAudioBackend::set_midi_option (const std::string& opt)
315 AlsaAudioBackend::midi_option () const
322 static void * pthread_process (void *arg)
324 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
325 d->main_process_thread ();
331 AlsaAudioBackend::_start (bool for_latency_measurement)
334 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
339 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
340 _system_inputs.clear();
341 _system_outputs.clear();
342 _system_midi_in.clear();
343 _system_midi_out.clear();
347 assert(_rmidi_in.size() == 0);
348 assert(_rmidi_out.size() == 0);
351 _pcmi = new Alsa_pcmi (_capture_device.c_str(), _playback_device.c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
352 if (_pcmi->state ()) {
353 PBD::error << _("AlsaAudioBackend: failed to open device (see stderr for details).") << endmsg;
354 delete _pcmi; _pcmi = 0;
362 if (_n_outputs != _pcmi->nplay ()) {
363 if (_n_outputs == 0) {
364 _n_outputs = _pcmi->nplay ();
366 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
368 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
371 if (_n_inputs != _pcmi->ncapt ()) {
372 if (_n_inputs == 0) {
373 _n_inputs = _pcmi->ncapt ();
375 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
377 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
380 if (_pcmi->fsize() != _samples_per_period) {
381 _samples_per_period = _pcmi->fsize();
382 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
385 if (_pcmi->fsamp() != _samplerate) {
386 _samplerate = _pcmi->fsamp();
387 engine.sample_rate_change (_samplerate);
388 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
391 if (for_latency_measurement) {
392 _systemic_input_latency = 0;
393 _systemic_output_latency = 0;
396 register_system_midi_ports();
398 if (register_system_audio_ports()) {
399 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
400 delete _pcmi; _pcmi = 0;
404 if (engine.reestablish_ports ()) {
405 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
406 delete _pcmi; _pcmi = 0;
410 engine.buffer_size_change (_samples_per_period);
411 engine.reconnect_ports ();
413 if (_realtime_pthread_create (SCHED_FIFO, -20,
414 &_main_thread, pthread_process, this))
416 if (pthread_create (&_main_thread, NULL, pthread_process, this))
418 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
419 delete _pcmi; _pcmi = 0;
422 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
427 while (!_running && --timeout > 0) { Glib::usleep (1000); }
429 if (timeout == 0 || !_running) {
430 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
431 delete _pcmi; _pcmi = 0;
439 AlsaAudioBackend::stop ()
447 if (pthread_join (_main_thread, &status)) {
448 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
452 while (!_rmidi_out.empty ()) {
453 AlsaRawMidiIO *m = _rmidi_out.back ();
455 _rmidi_out.pop_back ();
458 while (!_rmidi_in.empty ()) {
459 AlsaRawMidiIO *m = _rmidi_in.back ();
461 _rmidi_in.pop_back ();
465 unregister_system_ports();
466 delete _pcmi; _pcmi = 0;
471 AlsaAudioBackend::freewheel (bool onoff)
473 if (onoff == _freewheeling) {
476 _freewheeling = onoff;
477 engine.freewheel_callback (onoff);
482 AlsaAudioBackend::dsp_load () const
484 return 100.f * _dsp_load;
488 AlsaAudioBackend::raw_buffer_size (DataType t)
491 case DataType::AUDIO:
492 return _samples_per_period * sizeof(Sample);
494 return _max_buffer_size; // XXX not really limited
501 AlsaAudioBackend::sample_time ()
503 return _processed_samples;
507 AlsaAudioBackend::sample_time_at_cycle_start ()
509 return _processed_samples;
513 AlsaAudioBackend::samples_since_cycle_start ()
520 AlsaAudioBackend::alsa_process_thread (void *arg)
522 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
523 boost::function<void ()> f = td->f;
530 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
534 size_t stacksize = 100000;
536 pthread_attr_init (&attr);
537 pthread_attr_setstacksize (&attr, stacksize);
538 ThreadData* td = new ThreadData (this, func, stacksize);
540 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
541 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
542 pthread_attr_destroy (&attr);
545 pthread_attr_destroy (&attr);
547 _threads.push_back (thread_id);
552 AlsaAudioBackend::join_process_threads ()
556 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
559 if (pthread_join (*i, &status)) {
560 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
569 AlsaAudioBackend::in_process_thread ()
571 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
573 if (pthread_equal (*i, pthread_self ()) != 0) {
581 AlsaAudioBackend::process_thread_count ()
583 return _threads.size ();
587 AlsaAudioBackend::update_latencies ()
594 AlsaAudioBackend::private_handle () const
600 AlsaAudioBackend::my_name () const
602 return _instance_name;
606 AlsaAudioBackend::available () const
612 AlsaAudioBackend::port_name_size () const
618 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
620 if (!valid_port (port)) {
621 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
624 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
628 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
630 if (!valid_port (port)) {
631 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
632 return std::string ();
634 return static_cast<AlsaPort*>(port)->name ();
637 PortEngine::PortHandle
638 AlsaAudioBackend::get_port_by_name (const std::string& name) const
640 PortHandle port = (PortHandle) find_port (name);
645 AlsaAudioBackend::get_ports (
646 const std::string& port_name_pattern,
647 DataType type, PortFlags flags,
648 std::vector<std::string>& port_names) const
652 bool use_regexp = false;
653 if (port_name_pattern.size () > 0) {
654 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
658 for (size_t i = 0; i < _ports.size (); ++i) {
659 AlsaPort* port = _ports[i];
660 if ((port->type () == type) && (port->flags () & flags)) {
661 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
662 port_names.push_back (port->name ());
668 regfree (&port_regex);
674 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
676 if (!valid_port (port)) {
677 return DataType::NIL;
679 return static_cast<AlsaPort*>(port)->type ();
682 PortEngine::PortHandle
683 AlsaAudioBackend::register_port (
684 const std::string& name,
685 ARDOUR::DataType type,
686 ARDOUR::PortFlags flags)
688 if (name.size () == 0) { return 0; }
689 if (flags & IsPhysical) { return 0; }
690 return add_port (_instance_name + ":" + name, type, flags);
693 PortEngine::PortHandle
694 AlsaAudioBackend::add_port (
695 const std::string& name,
696 ARDOUR::DataType type,
697 ARDOUR::PortFlags flags)
699 assert(name.size ());
700 if (find_port (name)) {
701 PBD::error << _("AlsaBackend::register_port: Port already exists:")
702 << " (" << name << ")" << endmsg;
705 AlsaPort* port = NULL;
707 case DataType::AUDIO:
708 port = new AlsaAudioPort (*this, name, flags);
711 port = new AlsaMidiPort (*this, name, flags);
714 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
718 _ports.push_back (port);
724 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
726 if (!valid_port (port_handle)) {
727 PBD::error << _("AlsaBackend::unregister_port: Invalid Port.") << endmsg;
729 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
730 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
731 if (i == _ports.end ()) {
732 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
735 disconnect_all(port_handle);
741 AlsaAudioBackend::register_system_audio_ports()
745 const int a_ins = _n_inputs > 0 ? _n_inputs : 2;
746 const int a_out = _n_outputs > 0 ? _n_outputs : 2;
749 lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_input_latency;
750 for (int i = 1; i <= a_ins; ++i) {
752 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
753 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
755 set_latency_range (p, false, lr);
756 _system_inputs.push_back(static_cast<AlsaPort*>(p));
759 lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_output_latency;
760 for (int i = 1; i <= a_out; ++i) {
762 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
763 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
765 set_latency_range (p, false, lr);
766 _system_outputs.push_back(static_cast<AlsaPort*>(p));
772 AlsaAudioBackend::register_system_midi_ports()
775 std::vector<std::string> devices;
777 if (_midi_device == _("-None-")) {
780 else if (_midi_device == _("-All-")) {
781 enumerate_midi_devices(devices);
783 devices.push_back(_midi_device);
786 for (std::vector<std::string>::const_iterator i = devices.begin (); i != devices.end (); ++i) {
788 AlsaRawMidiOut *mout = new AlsaRawMidiOut (i->c_str());
789 if (mout->state ()) {
790 PBD::warning << string_compose (
791 _("AlsaRawMidiOut: failed to open midi device '%1'."), *i)
795 mout->setup_timing(_samples_per_period, _samplerate);
796 mout->sync_time (g_get_monotonic_time());
797 if (mout->start ()) {
798 PBD::warning << string_compose (
799 _("AlsaRawMidiOut: failed to start midi device '%1'."), *i)
803 _rmidi_out.push_back (mout);
807 AlsaRawMidiIn *midin = new AlsaRawMidiIn (i->c_str());
808 if (midin->state ()) {
809 PBD::warning << string_compose (
810 _("AlsaRawMidiIn: failed to open midi device '%1'."), *i)
814 midin->setup_timing(_samples_per_period, _samplerate);
815 midin->sync_time (g_get_monotonic_time());
816 if (midin->start ()) {
817 PBD::warning << string_compose (
818 _("AlsaRawMidiIn: failed to start midi device '%1'."), *i)
822 _rmidi_in.push_back (midin);
827 const int m_ins = _rmidi_in.size();
828 const int m_out = _rmidi_out.size();
830 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
831 for (int i = 1; i <= m_ins; ++i) {
833 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
834 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
836 set_latency_range (p, false, lr);
837 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
840 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
841 for (int i = 1; i <= m_out; ++i) {
843 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
844 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
846 set_latency_range (p, false, lr);
847 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
854 AlsaAudioBackend::unregister_system_ports()
857 _system_inputs.clear();
858 _system_outputs.clear();
859 _system_midi_in.clear();
860 _system_midi_out.clear();
861 while (i < _ports.size ()) {
862 AlsaPort* port = _ports[i];
863 if (port->is_physical () && port->is_terminal ()) {
864 port->disconnect_all ();
865 _ports.erase (_ports.begin() + i);
873 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
875 AlsaPort* src_port = find_port (src);
876 AlsaPort* dst_port = find_port (dst);
879 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
880 << " (" << src <<")" << endmsg;
884 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
885 << " (" << dst <<")" << endmsg;
888 return src_port->connect (dst_port);
892 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
894 AlsaPort* src_port = find_port (src);
895 AlsaPort* dst_port = find_port (dst);
897 if (!src_port || !dst_port) {
898 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
901 return src_port->disconnect (dst_port);
905 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
907 AlsaPort* dst_port = find_port (dst);
908 if (!valid_port (src)) {
909 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
913 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
914 << " (" << dst << ")" << endmsg;
917 return static_cast<AlsaPort*>(src)->connect (dst_port);
921 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
923 AlsaPort* dst_port = find_port (dst);
924 if (!valid_port (src) || !dst_port) {
925 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
928 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
932 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
934 if (!valid_port (port)) {
935 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
938 static_cast<AlsaPort*>(port)->disconnect_all ();
943 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
945 if (!valid_port (port)) {
946 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
949 return static_cast<AlsaPort*>(port)->is_connected ();
953 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
955 AlsaPort* dst_port = find_port (dst);
956 if (!valid_port (src) || !dst_port) {
957 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
960 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
964 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
966 if (!valid_port (port)) {
967 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
970 return static_cast<AlsaPort*>(port)->is_physically_connected ();
974 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
976 if (!valid_port (port)) {
977 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
981 assert (0 == names.size ());
983 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
985 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
986 names.push_back ((*i)->name ());
989 return (int)names.size ();
994 AlsaAudioBackend::midi_event_get (
995 pframes_t& timestamp,
996 size_t& size, uint8_t** buf, void* port_buffer,
997 uint32_t event_index)
999 assert (buf && port_buffer);
1000 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1001 if (event_index >= source.size ()) {
1004 AlsaMidiEvent * const event = source[event_index].get ();
1006 timestamp = event->timestamp ();
1007 size = event->size ();
1008 *buf = event->data ();
1013 AlsaAudioBackend::midi_event_put (
1015 pframes_t timestamp,
1016 const uint8_t* buffer, size_t size)
1018 assert (buffer && port_buffer);
1019 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1020 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1021 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1022 (pframes_t)dst.back ()->timestamp (), timestamp);
1025 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1030 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1032 assert (port_buffer);
1033 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1037 AlsaAudioBackend::midi_clear (void* port_buffer)
1039 assert (port_buffer);
1040 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1048 AlsaAudioBackend::can_monitor_input () const
1054 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1060 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1066 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1071 /* Latency management */
1074 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1076 if (!valid_port (port)) {
1077 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1079 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1083 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1085 if (!valid_port (port)) {
1086 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1092 return static_cast<AlsaPort*>(port)->latency_range (for_playback);
1095 /* Discovering physical ports */
1098 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1100 if (!valid_port (port)) {
1101 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1104 return static_cast<AlsaPort*>(port)->is_physical ();
1108 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1110 for (size_t i = 0; i < _ports.size (); ++i) {
1111 AlsaPort* port = _ports[i];
1112 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1113 port_names.push_back (port->name ());
1119 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1121 for (size_t i = 0; i < _ports.size (); ++i) {
1122 AlsaPort* port = _ports[i];
1123 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1124 port_names.push_back (port->name ());
1130 AlsaAudioBackend::n_physical_outputs () const
1134 for (size_t i = 0; i < _ports.size (); ++i) {
1135 AlsaPort* port = _ports[i];
1136 if (port->is_output () && port->is_physical ()) {
1137 switch (port->type ()) {
1138 case DataType::AUDIO: ++n_audio; break;
1139 case DataType::MIDI: ++n_midi; break;
1145 cc.set (DataType::AUDIO, n_audio);
1146 cc.set (DataType::MIDI, n_midi);
1151 AlsaAudioBackend::n_physical_inputs () const
1155 for (size_t i = 0; i < _ports.size (); ++i) {
1156 AlsaPort* port = _ports[i];
1157 if (port->is_input () && port->is_physical ()) {
1158 switch (port->type ()) {
1159 case DataType::AUDIO: ++n_audio; break;
1160 case DataType::MIDI: ++n_midi; break;
1166 cc.set (DataType::AUDIO, n_audio);
1167 cc.set (DataType::MIDI, n_midi);
1171 /* Getting access to the data buffer for a port */
1174 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1177 assert (valid_port (port));
1178 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1181 /* Engine Process */
1183 AlsaAudioBackend::main_process_thread ()
1185 AudioEngine::thread_init_callback (this);
1187 _processed_samples = 0;
1189 uint64_t clock1, clock2;
1190 clock1 = g_get_monotonic_time();
1191 _pcmi->pcm_start ();
1192 int no_proc_errors = 0;
1197 if (!_freewheeling) {
1198 nr = _pcmi->pcm_wait ();
1200 if (_pcmi->state () > 0) {
1204 if (_pcmi->state () < 0 || no_proc_errors > 50) {
1205 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1208 while (nr >= (long)_samples_per_period) {
1210 clock1 = g_get_monotonic_time();
1213 _pcmi->capt_init (_samples_per_period);
1214 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1215 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1217 _pcmi->capt_done (_samples_per_period);
1221 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1222 assert (_rmidi_in.size() > i);
1223 AlsaRawMidiIn *rm = static_cast<AlsaRawMidiIn*>(_rmidi_in.at(i));
1224 void *bptr = (*it)->get_buffer(0);
1226 uint8_t data[64]; // match MaxAlsaRawEventSize in alsa_rawmidi.cc
1227 size_t size = sizeof(data);
1229 while (rm->recv_event (time, data, size)) {
1230 midi_event_put(bptr, time, data, size);
1231 size = sizeof(data);
1233 rm->sync_time (clock1);
1236 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1237 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1240 if (engine.process_callback (_samples_per_period)) {
1247 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1248 assert (_rmidi_out.size() > i);
1249 AlsaRawMidiOut *rm = static_cast<AlsaRawMidiOut*>(_rmidi_out.at(i));
1250 const AlsaMidiBuffer *src = static_cast<const AlsaMidiBuffer*>((*it)->get_buffer(0));
1251 rm->sync_time (clock1); // ?? use clock pre DSP load?
1252 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1253 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1257 /* write back audio */
1259 _pcmi->play_init (_samples_per_period);
1260 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1261 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1263 for (; i < _pcmi->nplay (); ++i) {
1264 _pcmi->clear_chan (i, _samples_per_period);
1266 _pcmi->play_done (_samples_per_period);
1267 nr -= _samples_per_period;
1268 _processed_samples += _samples_per_period;
1270 /* calculate DSP load */
1271 clock2 = g_get_monotonic_time();
1272 const int64_t elapsed_time = clock2 - clock1;
1273 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1274 _dsp_load = elapsed_time / (float) nomial_time;
1277 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1280 fprintf(stderr, "ALSA x-run read: %.1f ms, write: %.1f ms\n",
1281 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1286 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1287 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1289 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1290 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1293 if (engine.process_callback (_samples_per_period)) {
1298 Glib::usleep (100); // don't hog cpu
1301 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1302 while (!_port_connection_queue.empty ()) {
1303 PortConnectData *c = _port_connection_queue.back ();
1304 manager.connect_callback (c->a, c->b, c->c);
1305 _port_connection_queue.pop_back ();
1308 pthread_mutex_unlock (&_port_callback_mutex);
1317 /******************************************************************************/
1319 static boost::shared_ptr<AlsaAudioBackend> _instance;
1321 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1322 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1323 static int deinstantiate ();
1324 static bool already_configured ();
1326 static ARDOUR::AudioBackendInfo _descriptor = {
1334 static boost::shared_ptr<AudioBackend>
1335 backend_factory (AudioEngine& e)
1338 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1344 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1346 s_instance_name = arg1;
1358 already_configured ()
1363 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1365 return &_descriptor;
1369 /******************************************************************************/
1370 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1375 _capture_latency_range.min = 0;
1376 _capture_latency_range.max = 0;
1377 _playback_latency_range.min = 0;
1378 _playback_latency_range.max = 0;
1381 AlsaPort::~AlsaPort () {
1386 int AlsaPort::connect (AlsaPort *port)
1389 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1393 if (type () != port->type ()) {
1394 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
1398 if (is_output () && port->is_output ()) {
1399 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
1403 if (is_input () && port->is_input ()) {
1404 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
1409 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
1413 if (is_connected (port)) {
1414 #if 0 // don't bother to warn about this for now. just ignore it
1415 PBD::error << _("AlsaPort::connect (): ports are already connected:")
1416 << " (" << name () << ") -> (" << port->name () << ")"
1422 _connect (port, true);
1427 void AlsaPort::_connect (AlsaPort *port, bool callback)
1429 _connections.push_back (port);
1431 port->_connect (this, false);
1432 _alsa_backend.port_connect_callback (name(), port->name(), true);
1436 int AlsaPort::disconnect (AlsaPort *port)
1439 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
1443 if (!is_connected (port)) {
1444 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
1445 << " (" << name () << ") -> (" << port->name () << ")"
1449 _disconnect (port, true);
1453 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
1455 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1457 assert (it != _connections.end ());
1459 _connections.erase (it);
1462 port->_disconnect (this, false);
1463 _alsa_backend.port_connect_callback (name(), port->name(), false);
1468 void AlsaPort::disconnect_all ()
1470 while (!_connections.empty ()) {
1471 _connections.back ()->_disconnect (this, false);
1472 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1473 _connections.pop_back ();
1478 AlsaPort::is_connected (const AlsaPort *port) const
1480 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1483 bool AlsaPort::is_physically_connected () const
1485 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1486 if ((*it)->is_physical ()) {
1493 /******************************************************************************/
1495 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1496 : AlsaPort (b, name, flags)
1498 memset (_buffer, 0, sizeof (_buffer));
1499 mlock(_buffer, sizeof (_buffer));
1502 AlsaAudioPort::~AlsaAudioPort () { }
1504 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
1507 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
1508 if (it == get_connections ().end ()) {
1509 memset (_buffer, 0, n_samples * sizeof (Sample));
1511 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
1512 assert (source && source->is_output ());
1513 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1514 while (++it != get_connections ().end ()) {
1515 source = static_cast<const AlsaAudioPort*>(*it);
1516 assert (source && source->is_output ());
1517 Sample* dst = buffer ();
1518 const Sample* src = source->const_buffer ();
1519 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1529 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1530 : AlsaPort (b, name, flags)
1535 AlsaMidiPort::~AlsaMidiPort () { }
1537 struct MidiEventSorter {
1538 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
1543 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
1547 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
1548 i != get_connections ().end ();
1550 const AlsaMidiBuffer src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
1551 for (AlsaMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
1552 _buffer.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
1555 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1560 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1562 , _timestamp (timestamp)
1566 _data = (uint8_t*) malloc (size);
1567 memcpy (_data, data, size);
1571 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
1572 : _size (other.size ())
1573 , _timestamp (other.timestamp ())
1576 if (other.size () && other.const_data ()) {
1577 _data = (uint8_t*) malloc (other.size ());
1578 memcpy (_data, other.const_data (), other.size ());
1582 AlsaMidiEvent::~AlsaMidiEvent () {