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;
85 snd_ctl_card_info_t *info;
86 snd_ctl_card_info_alloca (&info);
87 snd_pcm_info_t *pcminfo;
88 snd_pcm_info_alloca (&pcminfo);
90 while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) {
93 std::string devname = "hw:";
94 devname += PBD::to_string (cardnum, std::dec);
96 if (snd_ctl_open (&handle, devname.c_str(), 0) >= 0 && snd_ctl_card_info (handle, info) >= 0) {
97 if (snd_ctl_card_info (handle, info) < 0) {
101 std::string card_name = snd_ctl_card_info_get_name (info);
103 devname += snd_ctl_card_info_get_id (info);
105 while (snd_ctl_pcm_next_device (handle, &device) >= 0 && device >= 0) {
106 snd_pcm_info_set_device (pcminfo, device);
107 snd_pcm_info_set_subdevice (pcminfo, 0);
108 snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_CAPTURE);
109 if (snd_ctl_pcm_info (handle, pcminfo) < 0) {
112 snd_pcm_info_set_device (pcminfo, device);
113 snd_pcm_info_set_subdevice (pcminfo, 0);
114 snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_PLAYBACK);
115 if (snd_ctl_pcm_info (handle, pcminfo) < 0) {
119 devname += PBD::to_string (device, std::dec);
120 s.push_back (DeviceStatus (devname + " " + card_name, true));
122 snd_ctl_close (handle);
129 AlsaAudioBackend::available_sample_rates (const std::string&) const
131 std::vector<float> sr;
132 sr.push_back (8000.0);
133 sr.push_back (22050.0);
134 sr.push_back (24000.0);
135 sr.push_back (44100.0);
136 sr.push_back (48000.0);
137 sr.push_back (88200.0);
138 sr.push_back (96000.0);
139 sr.push_back (176400.0);
140 sr.push_back (192000.0);
144 std::vector<uint32_t>
145 AlsaAudioBackend::available_buffer_sizes (const std::string&) const
147 std::vector<uint32_t> bs;
161 AlsaAudioBackend::available_input_channel_count (const std::string&) const
163 return 128; // TODO query current device
167 AlsaAudioBackend::available_output_channel_count (const std::string&) const
169 return 128; // TODO query current device
173 AlsaAudioBackend::can_change_sample_rate_when_running () const
179 AlsaAudioBackend::can_change_buffer_size_when_running () const
185 AlsaAudioBackend::set_device_name (const std::string& d)
188 _playback_device = d;
193 AlsaAudioBackend::set_sample_rate (float sr)
195 if (sr <= 0) { return -1; }
197 engine.sample_rate_change (sr);
202 AlsaAudioBackend::set_buffer_size (uint32_t bs)
204 if (bs <= 0 || bs >= _max_buffer_size) {
207 _samples_per_period = bs;
208 engine.buffer_size_change (bs);
213 AlsaAudioBackend::set_interleaved (bool yn)
215 if (!yn) { return 0; }
220 AlsaAudioBackend::set_input_channels (uint32_t cc)
227 AlsaAudioBackend::set_output_channels (uint32_t cc)
234 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
236 _systemic_input_latency = sl;
241 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
243 _systemic_output_latency = sl;
247 /* Retrieving parameters */
249 AlsaAudioBackend::device_name () const
251 return _capture_device;
255 AlsaAudioBackend::sample_rate () const
261 AlsaAudioBackend::buffer_size () const
263 return _samples_per_period;
267 AlsaAudioBackend::interleaved () const
273 AlsaAudioBackend::input_channels () const
279 AlsaAudioBackend::output_channels () const
285 AlsaAudioBackend::systemic_input_latency () const
287 return _systemic_input_latency;
291 AlsaAudioBackend::systemic_output_latency () const
293 return _systemic_output_latency;
298 AlsaAudioBackend::enumerate_midi_devices (std::vector<std::string> &m) const
301 snd_ctl_card_info_t *cinfo;
302 snd_ctl_card_info_alloca (&cinfo);
303 while (snd_card_next (&cardnum) >= 0 && cardnum >= 0) {
305 std::string devname = "hw:";
306 devname += PBD::to_string (cardnum, std::dec);
307 if (snd_ctl_open (&handle, devname.c_str (), 0) >= 0 && snd_ctl_card_info (handle, cinfo) >= 0) {
309 while (snd_ctl_rawmidi_next_device (handle, &device) >= 0 && device >= 0) {
310 snd_rawmidi_info_t *info;
311 snd_rawmidi_info_alloca (&info);
312 snd_rawmidi_info_set_device (info, device);
314 int subs_in, subs_out;
316 snd_rawmidi_info_set_stream (info, SND_RAWMIDI_STREAM_INPUT);
317 if (snd_ctl_rawmidi_info (handle, info) >= 0) {
318 subs_in = snd_rawmidi_info_get_subdevices_count (info);
323 snd_rawmidi_info_set_stream (info, SND_RAWMIDI_STREAM_OUTPUT);
324 if (snd_ctl_rawmidi_info (handle, info) >= 0) {
325 subs_out = snd_rawmidi_info_get_subdevices_count (info);
330 const int subs = subs_in > subs_out ? subs_in : subs_out;
335 for (int sub = 0; sub < subs; ++sub) {
336 snd_rawmidi_info_set_stream (info, sub < subs_in ?
337 SND_RAWMIDI_STREAM_INPUT :
338 SND_RAWMIDI_STREAM_OUTPUT);
340 snd_rawmidi_info_set_subdevice (info, sub);
341 if (snd_ctl_rawmidi_info (handle, info) < 0) {
345 const char *sub_name = snd_rawmidi_info_get_subdevice_name (info);
346 if (sub == 0 && sub_name[0] == '\0') {
348 devname += snd_ctl_card_info_get_id (cinfo);
350 devname += PBD::to_string (device, std::dec);
352 devname += snd_rawmidi_info_get_name (info);
354 if (sub < subs_in) devname += "I";
355 if (sub < subs_out) devname += "O";
357 m.push_back (devname);
361 devname += snd_ctl_card_info_get_id (cinfo);
363 devname += PBD::to_string (device, std::dec);
365 devname += PBD::to_string (sub, std::dec);
369 if (sub < subs_in) devname += "I";
370 if (sub < subs_out) devname += "O";
372 m.push_back (devname);
376 snd_ctl_close (handle);
381 std::vector<std::string>
382 AlsaAudioBackend::enumerate_midi_options () const
384 std::vector<std::string> m;
385 m.push_back (_("-None-"));
386 enumerate_midi_devices(m);
388 m.push_back (_("-All-"));
394 AlsaAudioBackend::set_midi_option (const std::string& opt)
401 AlsaAudioBackend::midi_option () const
408 static void * pthread_process (void *arg)
410 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
411 d->main_process_thread ();
417 AlsaAudioBackend::_start (bool for_latency_measurement)
420 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
425 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
426 _system_inputs.clear();
427 _system_outputs.clear();
428 _system_midi_in.clear();
429 _system_midi_out.clear();
433 assert(_rmidi_in.size() == 0);
434 assert(_rmidi_out.size() == 0);
437 unsigned int pos = _capture_device.find(" ");
438 _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);
439 if (_pcmi->state ()) {
440 // TODO get detailed error from _pcmi
441 PBD::error << _("AlsaAudioBackend: failed to open device (see stderr for details).") << endmsg;
442 delete _pcmi; _pcmi = 0;
450 if (_n_outputs != _pcmi->nplay ()) {
451 if (_n_outputs == 0) {
452 _n_outputs = _pcmi->nplay ();
454 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
456 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
459 if (_n_inputs != _pcmi->ncapt ()) {
460 if (_n_inputs == 0) {
461 _n_inputs = _pcmi->ncapt ();
463 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
465 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
468 if (_pcmi->fsize() != _samples_per_period) {
469 _samples_per_period = _pcmi->fsize();
470 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
473 if (_pcmi->fsamp() != _samplerate) {
474 _samplerate = _pcmi->fsamp();
475 engine.sample_rate_change (_samplerate);
476 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
479 if (for_latency_measurement) {
480 _systemic_input_latency = 0;
481 _systemic_output_latency = 0;
484 register_system_midi_ports();
486 if (register_system_audio_ports()) {
487 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
488 delete _pcmi; _pcmi = 0;
492 if (engine.reestablish_ports ()) {
493 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
494 delete _pcmi; _pcmi = 0;
498 engine.buffer_size_change (_samples_per_period);
499 engine.reconnect_ports ();
501 if (_realtime_pthread_create (SCHED_FIFO, -20,
502 &_main_thread, pthread_process, this))
504 if (pthread_create (&_main_thread, NULL, pthread_process, this))
506 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
507 delete _pcmi; _pcmi = 0;
510 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
515 while (!_running && --timeout > 0) { Glib::usleep (1000); }
517 if (timeout == 0 || !_running) {
518 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
519 delete _pcmi; _pcmi = 0;
527 AlsaAudioBackend::stop ()
535 if (pthread_join (_main_thread, &status)) {
536 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
540 while (!_rmidi_out.empty ()) {
541 AlsaRawMidiIO *m = _rmidi_out.back ();
543 _rmidi_out.pop_back ();
546 while (!_rmidi_in.empty ()) {
547 AlsaRawMidiIO *m = _rmidi_in.back ();
549 _rmidi_in.pop_back ();
553 unregister_system_ports();
554 delete _pcmi; _pcmi = 0;
559 AlsaAudioBackend::freewheel (bool onoff)
561 if (onoff == _freewheeling) {
564 _freewheeling = onoff;
565 engine.freewheel_callback (onoff);
570 AlsaAudioBackend::dsp_load () const
572 return 100.f * _dsp_load;
576 AlsaAudioBackend::raw_buffer_size (DataType t)
579 case DataType::AUDIO:
580 return _samples_per_period * sizeof(Sample);
582 return _max_buffer_size; // XXX not really limited
589 AlsaAudioBackend::sample_time ()
591 return _processed_samples;
595 AlsaAudioBackend::sample_time_at_cycle_start ()
597 return _processed_samples;
601 AlsaAudioBackend::samples_since_cycle_start ()
608 AlsaAudioBackend::alsa_process_thread (void *arg)
610 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
611 boost::function<void ()> f = td->f;
618 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
622 size_t stacksize = 100000;
624 pthread_attr_init (&attr);
625 pthread_attr_setstacksize (&attr, stacksize);
626 ThreadData* td = new ThreadData (this, func, stacksize);
628 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
629 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
630 pthread_attr_destroy (&attr);
633 pthread_attr_destroy (&attr);
635 _threads.push_back (thread_id);
640 AlsaAudioBackend::join_process_threads ()
644 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
647 if (pthread_join (*i, &status)) {
648 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
657 AlsaAudioBackend::in_process_thread ()
659 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
661 if (pthread_equal (*i, pthread_self ()) != 0) {
669 AlsaAudioBackend::process_thread_count ()
671 return _threads.size ();
675 AlsaAudioBackend::update_latencies ()
682 AlsaAudioBackend::private_handle () const
688 AlsaAudioBackend::my_name () const
690 return _instance_name;
694 AlsaAudioBackend::available () const
700 AlsaAudioBackend::port_name_size () const
706 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
708 if (!valid_port (port)) {
709 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
712 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
716 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
718 if (!valid_port (port)) {
719 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
720 return std::string ();
722 return static_cast<AlsaPort*>(port)->name ();
725 PortEngine::PortHandle
726 AlsaAudioBackend::get_port_by_name (const std::string& name) const
728 PortHandle port = (PortHandle) find_port (name);
733 AlsaAudioBackend::get_ports (
734 const std::string& port_name_pattern,
735 DataType type, PortFlags flags,
736 std::vector<std::string>& port_names) const
740 bool use_regexp = false;
741 if (port_name_pattern.size () > 0) {
742 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
746 for (size_t i = 0; i < _ports.size (); ++i) {
747 AlsaPort* port = _ports[i];
748 if ((port->type () == type) && (port->flags () & flags)) {
749 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
750 port_names.push_back (port->name ());
756 regfree (&port_regex);
762 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
764 if (!valid_port (port)) {
765 return DataType::NIL;
767 return static_cast<AlsaPort*>(port)->type ();
770 PortEngine::PortHandle
771 AlsaAudioBackend::register_port (
772 const std::string& name,
773 ARDOUR::DataType type,
774 ARDOUR::PortFlags flags)
776 if (name.size () == 0) { return 0; }
777 if (flags & IsPhysical) { return 0; }
778 return add_port (_instance_name + ":" + name, type, flags);
781 PortEngine::PortHandle
782 AlsaAudioBackend::add_port (
783 const std::string& name,
784 ARDOUR::DataType type,
785 ARDOUR::PortFlags flags)
787 assert(name.size ());
788 if (find_port (name)) {
789 PBD::error << _("AlsaBackend::register_port: Port already exists:")
790 << " (" << name << ")" << endmsg;
793 AlsaPort* port = NULL;
795 case DataType::AUDIO:
796 port = new AlsaAudioPort (*this, name, flags);
799 port = new AlsaMidiPort (*this, name, flags);
802 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
806 _ports.push_back (port);
812 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
814 if (!valid_port (port_handle)) {
815 PBD::error << _("AlsaBackend::unregister_port: Invalid Port.") << endmsg;
817 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
818 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
819 if (i == _ports.end ()) {
820 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
823 disconnect_all(port_handle);
829 AlsaAudioBackend::register_system_audio_ports()
833 const int a_ins = _n_inputs > 0 ? _n_inputs : 2;
834 const int a_out = _n_outputs > 0 ? _n_outputs : 2;
837 lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_input_latency;
838 for (int i = 1; i <= a_ins; ++i) {
840 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
841 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
843 set_latency_range (p, false, lr);
844 _system_inputs.push_back(static_cast<AlsaPort*>(p));
847 lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_output_latency;
848 for (int i = 1; i <= a_out; ++i) {
850 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
851 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
853 set_latency_range (p, false, lr);
854 _system_outputs.push_back(static_cast<AlsaPort*>(p));
860 AlsaAudioBackend::register_system_midi_ports()
863 std::vector<std::string> devices;
865 if (_midi_device == _("-None-")) {
868 else if (_midi_device == _("-All-")) {
869 enumerate_midi_devices(devices);
871 unsigned int pos = _midi_device.find(" ");
872 devices.push_back(_midi_device.substr(0, pos));
875 for (std::vector<std::string>::const_iterator i = devices.begin (); i != devices.end (); ++i) {
877 AlsaRawMidiOut *mout = new AlsaRawMidiOut (i->c_str());
878 if (mout->state ()) {
879 PBD::warning << string_compose (
880 _("AlsaRawMidiOut: failed to open midi device '%1'."), *i)
884 mout->setup_timing(_samples_per_period, _samplerate);
885 mout->sync_time (g_get_monotonic_time());
886 if (mout->start ()) {
887 PBD::warning << string_compose (
888 _("AlsaRawMidiOut: failed to start midi device '%1'."), *i)
892 _rmidi_out.push_back (mout);
896 AlsaRawMidiIn *midin = new AlsaRawMidiIn (i->c_str());
897 if (midin->state ()) {
898 PBD::warning << string_compose (
899 _("AlsaRawMidiIn: failed to open midi device '%1'."), *i)
903 midin->setup_timing(_samples_per_period, _samplerate);
904 midin->sync_time (g_get_monotonic_time());
905 if (midin->start ()) {
906 PBD::warning << string_compose (
907 _("AlsaRawMidiIn: failed to start midi device '%1'."), *i)
911 _rmidi_in.push_back (midin);
916 const int m_ins = _rmidi_in.size();
917 const int m_out = _rmidi_out.size();
919 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
920 for (int i = 1; i <= m_ins; ++i) {
922 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
923 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
925 set_latency_range (p, false, lr);
926 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
929 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
930 for (int i = 1; i <= m_out; ++i) {
932 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
933 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
935 set_latency_range (p, false, lr);
936 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
943 AlsaAudioBackend::unregister_system_ports()
946 _system_inputs.clear();
947 _system_outputs.clear();
948 _system_midi_in.clear();
949 _system_midi_out.clear();
950 while (i < _ports.size ()) {
951 AlsaPort* port = _ports[i];
952 if (port->is_physical () && port->is_terminal ()) {
953 port->disconnect_all ();
954 _ports.erase (_ports.begin() + i);
962 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
964 AlsaPort* src_port = find_port (src);
965 AlsaPort* dst_port = find_port (dst);
968 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
969 << " (" << src <<")" << endmsg;
973 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
974 << " (" << dst <<")" << endmsg;
977 return src_port->connect (dst_port);
981 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
983 AlsaPort* src_port = find_port (src);
984 AlsaPort* dst_port = find_port (dst);
986 if (!src_port || !dst_port) {
987 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
990 return src_port->disconnect (dst_port);
994 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
996 AlsaPort* dst_port = find_port (dst);
997 if (!valid_port (src)) {
998 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1002 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1003 << " (" << dst << ")" << endmsg;
1006 return static_cast<AlsaPort*>(src)->connect (dst_port);
1010 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1012 AlsaPort* dst_port = find_port (dst);
1013 if (!valid_port (src) || !dst_port) {
1014 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1017 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1021 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1023 if (!valid_port (port)) {
1024 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1027 static_cast<AlsaPort*>(port)->disconnect_all ();
1032 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1034 if (!valid_port (port)) {
1035 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1038 return static_cast<AlsaPort*>(port)->is_connected ();
1042 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1044 AlsaPort* dst_port = find_port (dst);
1045 if (!valid_port (src) || !dst_port) {
1046 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1049 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1053 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1055 if (!valid_port (port)) {
1056 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1059 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1063 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1065 if (!valid_port (port)) {
1066 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1070 assert (0 == names.size ());
1072 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1074 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1075 names.push_back ((*i)->name ());
1078 return (int)names.size ();
1083 AlsaAudioBackend::midi_event_get (
1084 pframes_t& timestamp,
1085 size_t& size, uint8_t** buf, void* port_buffer,
1086 uint32_t event_index)
1088 assert (buf && port_buffer);
1089 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1090 if (event_index >= source.size ()) {
1093 AlsaMidiEvent * const event = source[event_index].get ();
1095 timestamp = event->timestamp ();
1096 size = event->size ();
1097 *buf = event->data ();
1102 AlsaAudioBackend::midi_event_put (
1104 pframes_t timestamp,
1105 const uint8_t* buffer, size_t size)
1107 assert (buffer && port_buffer);
1108 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1109 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1110 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1111 (pframes_t)dst.back ()->timestamp (), timestamp);
1114 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1119 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1121 assert (port_buffer);
1122 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1126 AlsaAudioBackend::midi_clear (void* port_buffer)
1128 assert (port_buffer);
1129 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1137 AlsaAudioBackend::can_monitor_input () const
1143 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1149 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1155 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1160 /* Latency management */
1163 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1165 if (!valid_port (port)) {
1166 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1168 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1172 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1174 if (!valid_port (port)) {
1175 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1181 return static_cast<AlsaPort*>(port)->latency_range (for_playback);
1184 /* Discovering physical ports */
1187 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1189 if (!valid_port (port)) {
1190 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1193 return static_cast<AlsaPort*>(port)->is_physical ();
1197 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1199 for (size_t i = 0; i < _ports.size (); ++i) {
1200 AlsaPort* port = _ports[i];
1201 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1202 port_names.push_back (port->name ());
1208 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1210 for (size_t i = 0; i < _ports.size (); ++i) {
1211 AlsaPort* port = _ports[i];
1212 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1213 port_names.push_back (port->name ());
1219 AlsaAudioBackend::n_physical_outputs () const
1223 for (size_t i = 0; i < _ports.size (); ++i) {
1224 AlsaPort* port = _ports[i];
1225 if (port->is_output () && port->is_physical ()) {
1226 switch (port->type ()) {
1227 case DataType::AUDIO: ++n_audio; break;
1228 case DataType::MIDI: ++n_midi; break;
1234 cc.set (DataType::AUDIO, n_audio);
1235 cc.set (DataType::MIDI, n_midi);
1240 AlsaAudioBackend::n_physical_inputs () const
1244 for (size_t i = 0; i < _ports.size (); ++i) {
1245 AlsaPort* port = _ports[i];
1246 if (port->is_input () && port->is_physical ()) {
1247 switch (port->type ()) {
1248 case DataType::AUDIO: ++n_audio; break;
1249 case DataType::MIDI: ++n_midi; break;
1255 cc.set (DataType::AUDIO, n_audio);
1256 cc.set (DataType::MIDI, n_midi);
1260 /* Getting access to the data buffer for a port */
1263 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1266 assert (valid_port (port));
1267 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1270 /* Engine Process */
1272 AlsaAudioBackend::main_process_thread ()
1274 AudioEngine::thread_init_callback (this);
1276 _processed_samples = 0;
1278 uint64_t clock1, clock2;
1279 clock1 = g_get_monotonic_time();
1280 _pcmi->pcm_start ();
1281 int no_proc_errors = 0;
1286 if (!_freewheeling) {
1287 nr = _pcmi->pcm_wait ();
1289 if (_pcmi->state () > 0) {
1293 if (_pcmi->state () < 0 || no_proc_errors > 50) {
1294 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1297 while (nr >= (long)_samples_per_period) {
1299 clock1 = g_get_monotonic_time();
1302 _pcmi->capt_init (_samples_per_period);
1303 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1304 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1306 _pcmi->capt_done (_samples_per_period);
1310 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1311 assert (_rmidi_in.size() > i);
1312 AlsaRawMidiIn *rm = static_cast<AlsaRawMidiIn*>(_rmidi_in.at(i));
1313 void *bptr = (*it)->get_buffer(0);
1315 uint8_t data[64]; // match MaxAlsaRawEventSize in alsa_rawmidi.cc
1316 size_t size = sizeof(data);
1318 while (rm->recv_event (time, data, size)) {
1319 midi_event_put(bptr, time, data, size);
1320 size = sizeof(data);
1322 rm->sync_time (clock1);
1325 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1326 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1329 if (engine.process_callback (_samples_per_period)) {
1336 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1337 assert (_rmidi_out.size() > i);
1338 AlsaRawMidiOut *rm = static_cast<AlsaRawMidiOut*>(_rmidi_out.at(i));
1339 const AlsaMidiBuffer *src = static_cast<const AlsaMidiBuffer*>((*it)->get_buffer(0));
1340 rm->sync_time (clock1); // ?? use clock pre DSP load?
1341 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1342 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1346 /* write back audio */
1348 _pcmi->play_init (_samples_per_period);
1349 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1350 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1352 for (; i < _pcmi->nplay (); ++i) {
1353 _pcmi->clear_chan (i, _samples_per_period);
1355 _pcmi->play_done (_samples_per_period);
1356 nr -= _samples_per_period;
1357 _processed_samples += _samples_per_period;
1359 /* calculate DSP load */
1360 clock2 = g_get_monotonic_time();
1361 const int64_t elapsed_time = clock2 - clock1;
1362 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1363 _dsp_load = elapsed_time / (float) nomial_time;
1366 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1369 fprintf(stderr, "ALSA x-run read: %.1f ms, write: %.1f ms\n",
1370 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1375 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1376 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1378 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1379 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1382 if (engine.process_callback (_samples_per_period)) {
1387 Glib::usleep (100); // don't hog cpu
1390 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1391 while (!_port_connection_queue.empty ()) {
1392 PortConnectData *c = _port_connection_queue.back ();
1393 manager.connect_callback (c->a, c->b, c->c);
1394 _port_connection_queue.pop_back ();
1397 pthread_mutex_unlock (&_port_callback_mutex);
1406 /******************************************************************************/
1408 static boost::shared_ptr<AlsaAudioBackend> _instance;
1410 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1411 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1412 static int deinstantiate ();
1413 static bool already_configured ();
1415 static ARDOUR::AudioBackendInfo _descriptor = {
1423 static boost::shared_ptr<AudioBackend>
1424 backend_factory (AudioEngine& e)
1427 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1433 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1435 s_instance_name = arg1;
1447 already_configured ()
1452 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1454 return &_descriptor;
1458 /******************************************************************************/
1459 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1464 _capture_latency_range.min = 0;
1465 _capture_latency_range.max = 0;
1466 _playback_latency_range.min = 0;
1467 _playback_latency_range.max = 0;
1470 AlsaPort::~AlsaPort () {
1475 int AlsaPort::connect (AlsaPort *port)
1478 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1482 if (type () != port->type ()) {
1483 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
1487 if (is_output () && port->is_output ()) {
1488 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
1492 if (is_input () && port->is_input ()) {
1493 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
1498 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
1502 if (is_connected (port)) {
1503 #if 0 // don't bother to warn about this for now. just ignore it
1504 PBD::error << _("AlsaPort::connect (): ports are already connected:")
1505 << " (" << name () << ") -> (" << port->name () << ")"
1511 _connect (port, true);
1516 void AlsaPort::_connect (AlsaPort *port, bool callback)
1518 _connections.push_back (port);
1520 port->_connect (this, false);
1521 _alsa_backend.port_connect_callback (name(), port->name(), true);
1525 int AlsaPort::disconnect (AlsaPort *port)
1528 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
1532 if (!is_connected (port)) {
1533 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
1534 << " (" << name () << ") -> (" << port->name () << ")"
1538 _disconnect (port, true);
1542 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
1544 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1546 assert (it != _connections.end ());
1548 _connections.erase (it);
1551 port->_disconnect (this, false);
1552 _alsa_backend.port_connect_callback (name(), port->name(), false);
1557 void AlsaPort::disconnect_all ()
1559 while (!_connections.empty ()) {
1560 _connections.back ()->_disconnect (this, false);
1561 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1562 _connections.pop_back ();
1567 AlsaPort::is_connected (const AlsaPort *port) const
1569 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1572 bool AlsaPort::is_physically_connected () const
1574 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1575 if ((*it)->is_physical ()) {
1582 /******************************************************************************/
1584 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1585 : AlsaPort (b, name, flags)
1587 memset (_buffer, 0, sizeof (_buffer));
1588 mlock(_buffer, sizeof (_buffer));
1591 AlsaAudioPort::~AlsaAudioPort () { }
1593 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
1596 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
1597 if (it == get_connections ().end ()) {
1598 memset (_buffer, 0, n_samples * sizeof (Sample));
1600 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
1601 assert (source && source->is_output ());
1602 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1603 while (++it != get_connections ().end ()) {
1604 source = static_cast<const AlsaAudioPort*>(*it);
1605 assert (source && source->is_output ());
1606 Sample* dst = buffer ();
1607 const Sample* src = source->const_buffer ();
1608 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1618 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1619 : AlsaPort (b, name, flags)
1624 AlsaMidiPort::~AlsaMidiPort () { }
1626 struct MidiEventSorter {
1627 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
1632 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
1636 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
1637 i != get_connections ().end ();
1639 const AlsaMidiBuffer src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
1640 for (AlsaMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
1641 _buffer.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
1644 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1649 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1651 , _timestamp (timestamp)
1655 _data = (uint8_t*) malloc (size);
1656 memcpy (_data, data, size);
1660 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
1661 : _size (other.size ())
1662 , _timestamp (other.timestamp ())
1665 if (other.size () && other.const_data ()) {
1666 _data = (uint8_t*) malloc (other.size ());
1667 memcpy (_data, other.const_data (), other.size ());
1671 AlsaMidiEvent::~AlsaMidiEvent () {