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)
44 , _freewheeling (false)
46 , _playback_device("")
48 , _samples_per_period (1024)
49 , _periods_per_cycle (2)
53 , _systemic_input_latency (0)
54 , _systemic_output_latency (0)
55 , _processed_samples (0)
57 _instance_name = s_instance_name;
58 pthread_mutex_init (&_port_callback_mutex, 0);
61 AlsaAudioBackend::~AlsaAudioBackend ()
63 pthread_mutex_destroy (&_port_callback_mutex);
66 /* AUDIOBACKEND API */
69 AlsaAudioBackend::name () const
75 AlsaAudioBackend::is_realtime () const
80 std::vector<AudioBackend::DeviceStatus>
81 AlsaAudioBackend::enumerate_devices () const
83 std::vector<AudioBackend::DeviceStatus> s;
86 snd_ctl_card_info_t *info;
87 snd_ctl_card_info_alloca (&info);
88 snd_pcm_info_t *pcminfo;
89 snd_pcm_info_alloca (&pcminfo);
91 while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) {
94 std::string devname = "hw:";
95 devname += PBD::to_string (cardnum, std::dec);
97 if (snd_ctl_open (&handle, devname.c_str(), 0) >= 0 && snd_ctl_card_info (handle, info) >= 0) {
98 if (snd_ctl_card_info (handle, info) < 0) {
102 std::string card_name = snd_ctl_card_info_get_name (info);
104 devname += snd_ctl_card_info_get_id (info);
106 while (snd_ctl_pcm_next_device (handle, &device) >= 0 && device >= 0) {
107 snd_pcm_info_set_device (pcminfo, device);
108 snd_pcm_info_set_subdevice (pcminfo, 0);
109 snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_CAPTURE);
110 if (snd_ctl_pcm_info (handle, pcminfo) < 0) {
113 snd_pcm_info_set_device (pcminfo, device);
114 snd_pcm_info_set_subdevice (pcminfo, 0);
115 snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_PLAYBACK);
116 if (snd_ctl_pcm_info (handle, pcminfo) < 0) {
120 devname += PBD::to_string (device, std::dec);
121 s.push_back (DeviceStatus (devname + " " + card_name, true));
123 snd_ctl_close (handle);
130 AlsaAudioBackend::available_sample_rates (const std::string&) const
132 std::vector<float> sr;
133 sr.push_back (8000.0);
134 sr.push_back (22050.0);
135 sr.push_back (24000.0);
136 sr.push_back (44100.0);
137 sr.push_back (48000.0);
138 sr.push_back (88200.0);
139 sr.push_back (96000.0);
140 sr.push_back (176400.0);
141 sr.push_back (192000.0);
145 std::vector<uint32_t>
146 AlsaAudioBackend::available_buffer_sizes (const std::string&) const
148 std::vector<uint32_t> bs;
162 AlsaAudioBackend::available_input_channel_count (const std::string&) const
164 return 128; // TODO query current device
168 AlsaAudioBackend::available_output_channel_count (const std::string&) const
170 return 128; // TODO query current device
174 AlsaAudioBackend::can_change_sample_rate_when_running () const
180 AlsaAudioBackend::can_change_buffer_size_when_running () const
186 AlsaAudioBackend::set_device_name (const std::string& d)
189 _playback_device = d;
194 AlsaAudioBackend::set_sample_rate (float sr)
196 if (sr <= 0) { return -1; }
198 engine.sample_rate_change (sr);
203 AlsaAudioBackend::set_buffer_size (uint32_t bs)
205 if (bs <= 0 || bs >= _max_buffer_size) {
208 _samples_per_period = bs;
209 engine.buffer_size_change (bs);
214 AlsaAudioBackend::set_interleaved (bool yn)
216 if (!yn) { return 0; }
221 AlsaAudioBackend::set_input_channels (uint32_t cc)
228 AlsaAudioBackend::set_output_channels (uint32_t cc)
235 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
237 _systemic_input_latency = sl;
242 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
244 _systemic_output_latency = sl;
248 /* Retrieving parameters */
250 AlsaAudioBackend::device_name () const
252 return _capture_device;
256 AlsaAudioBackend::sample_rate () const
262 AlsaAudioBackend::buffer_size () const
264 return _samples_per_period;
268 AlsaAudioBackend::interleaved () const
274 AlsaAudioBackend::input_channels () const
280 AlsaAudioBackend::output_channels () const
286 AlsaAudioBackend::systemic_input_latency () const
288 return _systemic_input_latency;
292 AlsaAudioBackend::systemic_output_latency () const
294 return _systemic_output_latency;
299 AlsaAudioBackend::enumerate_midi_devices (std::vector<std::string> &m) const
302 snd_ctl_card_info_t *cinfo;
303 snd_ctl_card_info_alloca (&cinfo);
304 while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) {
306 std::string devname = "hw:";
307 devname += PBD::to_string (cardnum, std::dec);
308 if (snd_ctl_open (&handle, devname.c_str (), 0) >= 0 && snd_ctl_card_info (handle, cinfo) >= 0) {
310 while (snd_ctl_rawmidi_next_device (handle, &device) >= 0 && device >= 0) {
311 snd_rawmidi_info_t *info;
312 snd_rawmidi_info_alloca (&info);
313 snd_rawmidi_info_set_device (info, device);
315 int subs_in, subs_out;
317 snd_rawmidi_info_set_stream (info, SND_RAWMIDI_STREAM_INPUT);
318 if (snd_ctl_rawmidi_info (handle, info) >= 0) {
319 subs_in = snd_rawmidi_info_get_subdevices_count (info);
324 snd_rawmidi_info_set_stream (info, SND_RAWMIDI_STREAM_OUTPUT);
325 if (snd_ctl_rawmidi_info (handle, info) >= 0) {
326 subs_out = snd_rawmidi_info_get_subdevices_count (info);
331 const int subs = subs_in > subs_out ? subs_in : subs_out;
336 for (int sub = 0; sub < subs; ++sub) {
337 snd_rawmidi_info_set_stream (info, sub < subs_in ?
338 SND_RAWMIDI_STREAM_INPUT :
339 SND_RAWMIDI_STREAM_OUTPUT);
341 snd_rawmidi_info_set_subdevice (info, sub);
342 if (snd_ctl_rawmidi_info (handle, info) < 0) {
346 const char *sub_name = snd_rawmidi_info_get_subdevice_name (info);
347 if (sub == 0 && sub_name[0] == '\0') {
349 devname += snd_ctl_card_info_get_id (cinfo);
351 devname += PBD::to_string (device, std::dec);
353 devname += snd_rawmidi_info_get_name (info);
355 if (sub < subs_in) devname += "I";
356 if (sub < subs_out) devname += "O";
358 m.push_back (devname);
362 devname += snd_ctl_card_info_get_id (cinfo);
364 devname += PBD::to_string (device, std::dec);
366 devname += PBD::to_string (sub, std::dec);
370 if (sub < subs_in) devname += "I";
371 if (sub < subs_out) devname += "O";
373 m.push_back (devname);
377 snd_ctl_close (handle);
382 std::vector<std::string>
383 AlsaAudioBackend::enumerate_midi_options () const
385 std::vector<std::string> m;
386 m.push_back (_("-None-"));
387 enumerate_midi_devices(m);
389 m.push_back (_("-All-"));
395 AlsaAudioBackend::set_midi_option (const std::string& opt)
402 AlsaAudioBackend::midi_option () const
409 static void * pthread_process (void *arg)
411 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
412 d->main_process_thread ();
418 AlsaAudioBackend::_start (bool for_latency_measurement)
420 if (_active || _run) {
421 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
426 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
427 _system_inputs.clear();
428 _system_outputs.clear();
429 _system_midi_in.clear();
430 _system_midi_out.clear();
434 assert(_rmidi_in.size() == 0);
435 assert(_rmidi_out.size() == 0);
438 unsigned int pos = _capture_device.find(" ");
439 _pcmi = new Alsa_pcmi (_capture_device.substr(0, pos).c_str(), _playback_device.substr(0, pos).c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
440 switch (_pcmi->state ()) {
441 case 0: /* OK */ break;
442 case -1: PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg; break;
443 case -2: PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg; break;
444 case -3: PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.") << endmsg; break;
445 case -4: PBD::error << _("AlsaAudioBackend: cannot set requested period size.") << endmsg; break;
446 case -5: PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.") << endmsg; break;
447 case -6: PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg; break;
448 default: PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg; break;
450 if (_pcmi->state ()) {
451 delete _pcmi; _pcmi = 0;
459 if (_n_outputs != _pcmi->nplay ()) {
460 if (_n_outputs == 0) {
461 _n_outputs = _pcmi->nplay ();
463 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
465 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
468 if (_n_inputs != _pcmi->ncapt ()) {
469 if (_n_inputs == 0) {
470 _n_inputs = _pcmi->ncapt ();
472 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
474 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
477 if (_pcmi->fsize() != _samples_per_period) {
478 _samples_per_period = _pcmi->fsize();
479 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
482 if (_pcmi->fsamp() != _samplerate) {
483 _samplerate = _pcmi->fsamp();
484 engine.sample_rate_change (_samplerate);
485 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
488 if (for_latency_measurement) {
489 _systemic_input_latency = 0;
490 _systemic_output_latency = 0;
493 register_system_midi_ports();
495 if (register_system_audio_ports()) {
496 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
497 delete _pcmi; _pcmi = 0;
501 if (engine.reestablish_ports ()) {
502 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
503 delete _pcmi; _pcmi = 0;
507 engine.buffer_size_change (_samples_per_period);
508 engine.reconnect_ports ();
511 if (_realtime_pthread_create (SCHED_FIFO, -20,
512 &_main_thread, pthread_process, this))
514 if (pthread_create (&_main_thread, NULL, pthread_process, this))
516 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
517 delete _pcmi; _pcmi = 0;
521 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
526 while (!_active && --timeout > 0) { Glib::usleep (1000); }
528 if (timeout == 0 || !_active) {
529 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
530 delete _pcmi; _pcmi = 0;
539 AlsaAudioBackend::stop ()
547 if (pthread_join (_main_thread, &status)) {
548 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
552 while (!_rmidi_out.empty ()) {
553 AlsaRawMidiIO *m = _rmidi_out.back ();
555 _rmidi_out.pop_back ();
558 while (!_rmidi_in.empty ()) {
559 AlsaRawMidiIO *m = _rmidi_in.back ();
561 _rmidi_in.pop_back ();
565 unregister_system_ports();
566 delete _pcmi; _pcmi = 0;
567 return (_active == false) ? 0 : -1;
571 AlsaAudioBackend::freewheel (bool onoff)
573 if (onoff == _freewheeling) {
576 _freewheeling = onoff;
577 engine.freewheel_callback (onoff);
582 AlsaAudioBackend::dsp_load () const
584 return 100.f * _dsp_load;
588 AlsaAudioBackend::raw_buffer_size (DataType t)
591 case DataType::AUDIO:
592 return _samples_per_period * sizeof(Sample);
594 return _max_buffer_size; // XXX not really limited
601 AlsaAudioBackend::sample_time ()
603 return _processed_samples;
607 AlsaAudioBackend::sample_time_at_cycle_start ()
609 return _processed_samples;
613 AlsaAudioBackend::samples_since_cycle_start ()
620 AlsaAudioBackend::alsa_process_thread (void *arg)
622 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
623 boost::function<void ()> f = td->f;
630 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
634 size_t stacksize = 100000;
636 pthread_attr_init (&attr);
637 pthread_attr_setstacksize (&attr, stacksize);
638 ThreadData* td = new ThreadData (this, func, stacksize);
640 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
641 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
642 pthread_attr_destroy (&attr);
645 pthread_attr_destroy (&attr);
647 _threads.push_back (thread_id);
652 AlsaAudioBackend::join_process_threads ()
656 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
659 if (pthread_join (*i, &status)) {
660 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
669 AlsaAudioBackend::in_process_thread ()
671 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
673 if (pthread_equal (*i, pthread_self ()) != 0) {
681 AlsaAudioBackend::process_thread_count ()
683 return _threads.size ();
687 AlsaAudioBackend::update_latencies ()
694 AlsaAudioBackend::private_handle () const
700 AlsaAudioBackend::my_name () const
702 return _instance_name;
706 AlsaAudioBackend::available () const
708 return _run && _active;
712 AlsaAudioBackend::port_name_size () const
718 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
720 if (!valid_port (port)) {
721 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
724 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
728 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
730 if (!valid_port (port)) {
731 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
732 return std::string ();
734 return static_cast<AlsaPort*>(port)->name ();
737 PortEngine::PortHandle
738 AlsaAudioBackend::get_port_by_name (const std::string& name) const
740 PortHandle port = (PortHandle) find_port (name);
745 AlsaAudioBackend::get_ports (
746 const std::string& port_name_pattern,
747 DataType type, PortFlags flags,
748 std::vector<std::string>& port_names) const
752 bool use_regexp = false;
753 if (port_name_pattern.size () > 0) {
754 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
758 for (size_t i = 0; i < _ports.size (); ++i) {
759 AlsaPort* port = _ports[i];
760 if ((port->type () == type) && (port->flags () & flags)) {
761 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
762 port_names.push_back (port->name ());
768 regfree (&port_regex);
774 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
776 if (!valid_port (port)) {
777 return DataType::NIL;
779 return static_cast<AlsaPort*>(port)->type ();
782 PortEngine::PortHandle
783 AlsaAudioBackend::register_port (
784 const std::string& name,
785 ARDOUR::DataType type,
786 ARDOUR::PortFlags flags)
788 if (name.size () == 0) { return 0; }
789 if (flags & IsPhysical) { return 0; }
790 return add_port (_instance_name + ":" + name, type, flags);
793 PortEngine::PortHandle
794 AlsaAudioBackend::add_port (
795 const std::string& name,
796 ARDOUR::DataType type,
797 ARDOUR::PortFlags flags)
799 assert(name.size ());
800 if (find_port (name)) {
801 PBD::error << _("AlsaBackend::register_port: Port already exists:")
802 << " (" << name << ")" << endmsg;
805 AlsaPort* port = NULL;
807 case DataType::AUDIO:
808 port = new AlsaAudioPort (*this, name, flags);
811 port = new AlsaMidiPort (*this, name, flags);
814 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
818 _ports.push_back (port);
824 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
826 if (!valid_port (port_handle)) {
827 PBD::error << _("AlsaBackend::unregister_port: Invalid Port.") << endmsg;
829 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
830 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
831 if (i == _ports.end ()) {
832 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
835 disconnect_all(port_handle);
841 AlsaAudioBackend::register_system_audio_ports()
845 const int a_ins = _n_inputs > 0 ? _n_inputs : 2;
846 const int a_out = _n_outputs > 0 ? _n_outputs : 2;
849 lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_input_latency;
850 for (int i = 1; i <= a_ins; ++i) {
852 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
853 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
855 set_latency_range (p, false, lr);
856 _system_inputs.push_back(static_cast<AlsaPort*>(p));
859 lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_output_latency;
860 for (int i = 1; i <= a_out; ++i) {
862 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
863 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
865 set_latency_range (p, false, lr);
866 _system_outputs.push_back(static_cast<AlsaPort*>(p));
872 AlsaAudioBackend::register_system_midi_ports()
875 std::vector<std::string> devices;
877 if (_midi_device == _("-None-")) {
880 else if (_midi_device == _("-All-")) {
881 enumerate_midi_devices(devices);
883 unsigned int pos = _midi_device.find(" ");
884 devices.push_back(_midi_device.substr(0, pos));
887 for (std::vector<std::string>::const_iterator i = devices.begin (); i != devices.end (); ++i) {
889 AlsaRawMidiOut *mout = new AlsaRawMidiOut (i->c_str());
890 if (mout->state ()) {
891 PBD::warning << string_compose (
892 _("AlsaRawMidiOut: failed to open midi device '%1'."), *i)
896 mout->setup_timing(_samples_per_period, _samplerate);
897 mout->sync_time (g_get_monotonic_time());
898 if (mout->start ()) {
899 PBD::warning << string_compose (
900 _("AlsaRawMidiOut: failed to start midi device '%1'."), *i)
904 _rmidi_out.push_back (mout);
908 AlsaRawMidiIn *midin = new AlsaRawMidiIn (i->c_str());
909 if (midin->state ()) {
910 PBD::warning << string_compose (
911 _("AlsaRawMidiIn: failed to open midi device '%1'."), *i)
915 midin->setup_timing(_samples_per_period, _samplerate);
916 midin->sync_time (g_get_monotonic_time());
917 if (midin->start ()) {
918 PBD::warning << string_compose (
919 _("AlsaRawMidiIn: failed to start midi device '%1'."), *i)
923 _rmidi_in.push_back (midin);
928 const int m_ins = _rmidi_in.size();
929 const int m_out = _rmidi_out.size();
931 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
932 for (int i = 1; i <= m_ins; ++i) {
934 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
935 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
937 set_latency_range (p, false, lr);
938 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
941 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
942 for (int i = 1; i <= m_out; ++i) {
944 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
945 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
947 set_latency_range (p, false, lr);
948 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
955 AlsaAudioBackend::unregister_system_ports()
958 _system_inputs.clear();
959 _system_outputs.clear();
960 _system_midi_in.clear();
961 _system_midi_out.clear();
962 while (i < _ports.size ()) {
963 AlsaPort* port = _ports[i];
964 if (port->is_physical () && port->is_terminal ()) {
965 port->disconnect_all ();
966 _ports.erase (_ports.begin() + i);
974 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
976 AlsaPort* src_port = find_port (src);
977 AlsaPort* dst_port = find_port (dst);
980 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
981 << " (" << src <<")" << endmsg;
985 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
986 << " (" << dst <<")" << endmsg;
989 return src_port->connect (dst_port);
993 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
995 AlsaPort* src_port = find_port (src);
996 AlsaPort* dst_port = find_port (dst);
998 if (!src_port || !dst_port) {
999 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1002 return src_port->disconnect (dst_port);
1006 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1008 AlsaPort* dst_port = find_port (dst);
1009 if (!valid_port (src)) {
1010 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1014 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1015 << " (" << dst << ")" << endmsg;
1018 return static_cast<AlsaPort*>(src)->connect (dst_port);
1022 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1024 AlsaPort* dst_port = find_port (dst);
1025 if (!valid_port (src) || !dst_port) {
1026 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1029 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1033 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1035 if (!valid_port (port)) {
1036 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1039 static_cast<AlsaPort*>(port)->disconnect_all ();
1044 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1046 if (!valid_port (port)) {
1047 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1050 return static_cast<AlsaPort*>(port)->is_connected ();
1054 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1056 AlsaPort* dst_port = find_port (dst);
1057 if (!valid_port (src) || !dst_port) {
1058 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1061 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1065 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1067 if (!valid_port (port)) {
1068 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1071 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1075 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1077 if (!valid_port (port)) {
1078 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1082 assert (0 == names.size ());
1084 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1086 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1087 names.push_back ((*i)->name ());
1090 return (int)names.size ();
1095 AlsaAudioBackend::midi_event_get (
1096 pframes_t& timestamp,
1097 size_t& size, uint8_t** buf, void* port_buffer,
1098 uint32_t event_index)
1100 assert (buf && port_buffer);
1101 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1102 if (event_index >= source.size ()) {
1105 AlsaMidiEvent * const event = source[event_index].get ();
1107 timestamp = event->timestamp ();
1108 size = event->size ();
1109 *buf = event->data ();
1114 AlsaAudioBackend::midi_event_put (
1116 pframes_t timestamp,
1117 const uint8_t* buffer, size_t size)
1119 assert (buffer && port_buffer);
1120 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1121 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1122 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1123 (pframes_t)dst.back ()->timestamp (), timestamp);
1126 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1131 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1133 assert (port_buffer);
1134 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1138 AlsaAudioBackend::midi_clear (void* port_buffer)
1140 assert (port_buffer);
1141 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1149 AlsaAudioBackend::can_monitor_input () const
1155 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1161 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1167 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1172 /* Latency management */
1175 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1177 if (!valid_port (port)) {
1178 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1180 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1184 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1186 if (!valid_port (port)) {
1187 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1193 return static_cast<AlsaPort*>(port)->latency_range (for_playback);
1196 /* Discovering physical ports */
1199 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1201 if (!valid_port (port)) {
1202 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1205 return static_cast<AlsaPort*>(port)->is_physical ();
1209 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1211 for (size_t i = 0; i < _ports.size (); ++i) {
1212 AlsaPort* port = _ports[i];
1213 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1214 port_names.push_back (port->name ());
1220 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1222 for (size_t i = 0; i < _ports.size (); ++i) {
1223 AlsaPort* port = _ports[i];
1224 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1225 port_names.push_back (port->name ());
1231 AlsaAudioBackend::n_physical_outputs () const
1235 for (size_t i = 0; i < _ports.size (); ++i) {
1236 AlsaPort* port = _ports[i];
1237 if (port->is_output () && port->is_physical ()) {
1238 switch (port->type ()) {
1239 case DataType::AUDIO: ++n_audio; break;
1240 case DataType::MIDI: ++n_midi; break;
1246 cc.set (DataType::AUDIO, n_audio);
1247 cc.set (DataType::MIDI, n_midi);
1252 AlsaAudioBackend::n_physical_inputs () const
1256 for (size_t i = 0; i < _ports.size (); ++i) {
1257 AlsaPort* port = _ports[i];
1258 if (port->is_input () && port->is_physical ()) {
1259 switch (port->type ()) {
1260 case DataType::AUDIO: ++n_audio; break;
1261 case DataType::MIDI: ++n_midi; break;
1267 cc.set (DataType::AUDIO, n_audio);
1268 cc.set (DataType::MIDI, n_midi);
1272 /* Getting access to the data buffer for a port */
1275 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1278 assert (valid_port (port));
1279 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1282 /* Engine Process */
1284 AlsaAudioBackend::main_process_thread ()
1286 AudioEngine::thread_init_callback (this);
1288 _processed_samples = 0;
1290 uint64_t clock1, clock2;
1291 clock1 = g_get_monotonic_time();
1292 _pcmi->pcm_start ();
1293 int no_proc_errors = 0;
1298 if (!_freewheeling) {
1299 nr = _pcmi->pcm_wait ();
1301 if (_pcmi->state () > 0) {
1305 if (_pcmi->state () < 0 || no_proc_errors > 50) {
1306 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1309 while (nr >= (long)_samples_per_period) {
1311 clock1 = g_get_monotonic_time();
1314 _pcmi->capt_init (_samples_per_period);
1315 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1316 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1318 _pcmi->capt_done (_samples_per_period);
1322 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1323 assert (_rmidi_in.size() > i);
1324 AlsaRawMidiIn *rm = static_cast<AlsaRawMidiIn*>(_rmidi_in.at(i));
1325 void *bptr = (*it)->get_buffer(0);
1327 uint8_t data[64]; // match MaxAlsaRawEventSize in alsa_rawmidi.cc
1328 size_t size = sizeof(data);
1330 while (rm->recv_event (time, data, size)) {
1331 midi_event_put(bptr, time, data, size);
1332 size = sizeof(data);
1334 rm->sync_time (clock1);
1337 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1338 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1341 if (engine.process_callback (_samples_per_period)) {
1348 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1349 assert (_rmidi_out.size() > i);
1350 AlsaRawMidiOut *rm = static_cast<AlsaRawMidiOut*>(_rmidi_out.at(i));
1351 const AlsaMidiBuffer *src = static_cast<const AlsaMidiBuffer*>((*it)->get_buffer(0));
1352 rm->sync_time (clock1); // ?? use clock pre DSP load?
1353 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1354 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1358 /* write back audio */
1360 _pcmi->play_init (_samples_per_period);
1361 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1362 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1364 for (; i < _pcmi->nplay (); ++i) {
1365 _pcmi->clear_chan (i, _samples_per_period);
1367 _pcmi->play_done (_samples_per_period);
1368 nr -= _samples_per_period;
1369 _processed_samples += _samples_per_period;
1371 /* calculate DSP load */
1372 clock2 = g_get_monotonic_time();
1373 const int64_t elapsed_time = clock2 - clock1;
1374 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1375 _dsp_load = elapsed_time / (float) nomial_time;
1378 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1381 fprintf(stderr, "ALSA x-run read: %.1f ms, write: %.1f ms\n",
1382 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1387 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1388 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1390 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1391 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1394 if (engine.process_callback (_samples_per_period)) {
1399 Glib::usleep (100); // don't hog cpu
1402 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1403 while (!_port_connection_queue.empty ()) {
1404 PortConnectData *c = _port_connection_queue.back ();
1405 manager.connect_callback (c->a, c->b, c->c);
1406 _port_connection_queue.pop_back ();
1409 pthread_mutex_unlock (&_port_callback_mutex);
1419 /******************************************************************************/
1421 static boost::shared_ptr<AlsaAudioBackend> _instance;
1423 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1424 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1425 static int deinstantiate ();
1426 static bool already_configured ();
1428 static ARDOUR::AudioBackendInfo _descriptor = {
1436 static boost::shared_ptr<AudioBackend>
1437 backend_factory (AudioEngine& e)
1440 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1446 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1448 s_instance_name = arg1;
1460 already_configured ()
1465 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1467 return &_descriptor;
1471 /******************************************************************************/
1472 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1477 _capture_latency_range.min = 0;
1478 _capture_latency_range.max = 0;
1479 _playback_latency_range.min = 0;
1480 _playback_latency_range.max = 0;
1483 AlsaPort::~AlsaPort () {
1488 int AlsaPort::connect (AlsaPort *port)
1491 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1495 if (type () != port->type ()) {
1496 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
1500 if (is_output () && port->is_output ()) {
1501 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
1505 if (is_input () && port->is_input ()) {
1506 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
1511 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
1515 if (is_connected (port)) {
1516 #if 0 // don't bother to warn about this for now. just ignore it
1517 PBD::error << _("AlsaPort::connect (): ports are already connected:")
1518 << " (" << name () << ") -> (" << port->name () << ")"
1524 _connect (port, true);
1529 void AlsaPort::_connect (AlsaPort *port, bool callback)
1531 _connections.push_back (port);
1533 port->_connect (this, false);
1534 _alsa_backend.port_connect_callback (name(), port->name(), true);
1538 int AlsaPort::disconnect (AlsaPort *port)
1541 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
1545 if (!is_connected (port)) {
1546 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
1547 << " (" << name () << ") -> (" << port->name () << ")"
1551 _disconnect (port, true);
1555 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
1557 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1559 assert (it != _connections.end ());
1561 _connections.erase (it);
1564 port->_disconnect (this, false);
1565 _alsa_backend.port_connect_callback (name(), port->name(), false);
1570 void AlsaPort::disconnect_all ()
1572 while (!_connections.empty ()) {
1573 _connections.back ()->_disconnect (this, false);
1574 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1575 _connections.pop_back ();
1580 AlsaPort::is_connected (const AlsaPort *port) const
1582 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1585 bool AlsaPort::is_physically_connected () const
1587 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1588 if ((*it)->is_physical ()) {
1595 /******************************************************************************/
1597 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1598 : AlsaPort (b, name, flags)
1600 memset (_buffer, 0, sizeof (_buffer));
1601 mlock(_buffer, sizeof (_buffer));
1604 AlsaAudioPort::~AlsaAudioPort () { }
1606 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
1609 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
1610 if (it == get_connections ().end ()) {
1611 memset (_buffer, 0, n_samples * sizeof (Sample));
1613 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
1614 assert (source && source->is_output ());
1615 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1616 while (++it != get_connections ().end ()) {
1617 source = static_cast<const AlsaAudioPort*>(*it);
1618 assert (source && source->is_output ());
1619 Sample* dst = buffer ();
1620 const Sample* src = source->const_buffer ();
1621 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1631 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1632 : AlsaPort (b, name, flags)
1637 AlsaMidiPort::~AlsaMidiPort () { }
1639 struct MidiEventSorter {
1640 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
1645 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
1649 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
1650 i != get_connections ().end ();
1652 const AlsaMidiBuffer src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
1653 for (AlsaMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
1654 _buffer.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
1657 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1662 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1664 , _timestamp (timestamp)
1668 _data = (uint8_t*) malloc (size);
1669 memcpy (_data, data, size);
1673 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
1674 : _size (other.size ())
1675 , _timestamp (other.timestamp ())
1678 if (other.size () && other.const_data ()) {
1679 _data = (uint8_t*) malloc (other.size ());
1680 memcpy (_data, other.const_data (), other.size ());
1684 AlsaMidiEvent::~AlsaMidiEvent () {