2 * Copyright (C) 2014 Robin Gareus <robin@gareus.org>
3 * Copyright (C) 2013 Paul Davis
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "alsa_audiobackend.h"
27 #include "rt_thread.h"
29 #include "pbd/compose.h"
30 #include "pbd/error.h"
31 #include "pbd/file_utils.h"
32 #include "ardour/port_manager.h"
33 #include "ardour/system_exec.h"
34 #include "ardouralsautil/devicelist.h"
37 using namespace ARDOUR;
39 static std::string s_instance_name;
40 size_t AlsaAudioBackend::_max_buffer_size = 8192;
42 AlsaAudioBackend::AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info)
43 : AudioBackend (e, info)
47 , _freewheeling (false)
51 , _samples_per_period (1024)
52 , _periods_per_cycle (2)
56 , _systemic_input_latency (0)
57 , _systemic_output_latency (0)
58 , _processed_samples (0)
60 _instance_name = s_instance_name;
61 pthread_mutex_init (&_port_callback_mutex, 0);
64 AlsaAudioBackend::~AlsaAudioBackend ()
66 pthread_mutex_destroy (&_port_callback_mutex);
69 /* AUDIOBACKEND API */
72 AlsaAudioBackend::name () const
78 AlsaAudioBackend::is_realtime () const
83 std::vector<AudioBackend::DeviceStatus>
84 AlsaAudioBackend::enumerate_devices () const
86 std::vector<AudioBackend::DeviceStatus> s;
87 std::map<std::string, std::string> devices;
88 get_alsa_audio_device_names(devices);
89 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
90 s.push_back (DeviceStatus (i->first, true));
95 static void acquire_device(const char* device_name)
97 /* This is quick hack, ideally we'll link against libdbus and implement a dbus-listener
98 * that owns the device. here we try to get away by just requesting it and then block it...
99 * (pulseaudio periodically checks anyway)
101 * dbus-send --session --print-reply --type=method_call --dest=org.freedesktop.ReserveDevice1.Audio2 /org/freedesktop/ReserveDevice1/Audio2 org.freedesktop.ReserveDevice1.RequestRelease int32:4
102 * -> should not return 'boolean false'
104 int device_number = card_to_num(device_name);
105 if (device_number < 0) return;
107 std::string dbus_send_path;
108 if (PBD::find_file_in_search_path (PBD::Searchpath(Glib::getenv("PATH")), X_("dbus-send"), dbus_send_path)) {
111 argp=(char**) calloc(8,sizeof(char*));
112 argp[0] = strdup(dbus_send_path.c_str());
113 argp[1] = strdup("--session");
114 argp[2] = strdup("--print-reply"); // need to wait for the receiver to act.
115 argp[3] = strdup("--type=method_call");
116 snprintf(tmp, sizeof(tmp), "--dest=org.freedesktop.ReserveDevice1.Audio%d", device_number);
117 argp[4] = strdup(tmp);
118 snprintf(tmp, sizeof(tmp), "/org/freedesktop/ReserveDevice1/Audio%d", device_number);
119 argp[5] = strdup(tmp);
120 argp[6] = strdup("org.freedesktop.ReserveDevice1.RequestRelease");
121 argp[7] = strdup("int32:4294967296");
122 snprintf(tmp, sizeof(tmp), "string:'org.freedesktop.ReserveDevice1.Audio%d'", device_number);
123 argp[7] = strdup(tmp);
126 ARDOUR::SystemExec process (dbus_send_path, argp);
127 if (!process.start(1)) {
134 AlsaAudioBackend::available_sample_rates (const std::string&) const
136 std::vector<float> sr;
137 sr.push_back (8000.0);
138 sr.push_back (22050.0);
139 sr.push_back (24000.0);
140 sr.push_back (44100.0);
141 sr.push_back (48000.0);
142 sr.push_back (88200.0);
143 sr.push_back (96000.0);
144 sr.push_back (176400.0);
145 sr.push_back (192000.0);
149 std::vector<uint32_t>
150 AlsaAudioBackend::available_buffer_sizes (const std::string&) const
152 std::vector<uint32_t> bs;
166 AlsaAudioBackend::available_input_channel_count (const std::string&) const
168 return 128; // TODO query current device
172 AlsaAudioBackend::available_output_channel_count (const std::string&) const
174 return 128; // TODO query current device
178 AlsaAudioBackend::can_change_sample_rate_when_running () const
184 AlsaAudioBackend::can_change_buffer_size_when_running () const
190 AlsaAudioBackend::set_device_name (const std::string& d)
197 AlsaAudioBackend::set_sample_rate (float sr)
199 if (sr <= 0) { return -1; }
201 engine.sample_rate_change (sr);
206 AlsaAudioBackend::set_buffer_size (uint32_t bs)
208 if (bs <= 0 || bs >= _max_buffer_size) {
211 _samples_per_period = bs;
212 engine.buffer_size_change (bs);
217 AlsaAudioBackend::set_interleaved (bool yn)
219 if (!yn) { return 0; }
224 AlsaAudioBackend::set_input_channels (uint32_t cc)
231 AlsaAudioBackend::set_output_channels (uint32_t cc)
238 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
240 _systemic_input_latency = sl;
245 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
247 _systemic_output_latency = sl;
251 /* Retrieving parameters */
253 AlsaAudioBackend::device_name () const
255 return _audio_device;
259 AlsaAudioBackend::sample_rate () const
265 AlsaAudioBackend::buffer_size () const
267 return _samples_per_period;
271 AlsaAudioBackend::interleaved () const
277 AlsaAudioBackend::input_channels () const
283 AlsaAudioBackend::output_channels () const
289 AlsaAudioBackend::systemic_input_latency () const
291 return _systemic_input_latency;
295 AlsaAudioBackend::systemic_output_latency () const
297 return _systemic_output_latency;
301 std::vector<std::string>
302 AlsaAudioBackend::enumerate_midi_options () const
304 std::vector<std::string> m;
305 m.push_back (_("-None-"));
306 std::map<std::string, std::string> devices;
307 get_alsa_rawmidi_device_names(devices);
309 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
310 m.push_back (i->first);
313 m.push_back (_("-All-"));
319 AlsaAudioBackend::set_midi_option (const std::string& opt)
326 AlsaAudioBackend::midi_option () const
333 static void * pthread_process (void *arg)
335 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
336 d->main_process_thread ();
342 AlsaAudioBackend::_start (bool for_latency_measurement)
344 if (_active || _run) {
345 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
350 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
351 _system_inputs.clear();
352 _system_outputs.clear();
353 _system_midi_in.clear();
354 _system_midi_out.clear();
358 assert(_rmidi_in.size() == 0);
359 assert(_rmidi_out.size() == 0);
362 std::string alsa_device;
363 std::map<std::string, std::string> devices;
364 get_alsa_audio_device_names(devices);
365 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
366 if (i->first == _audio_device) {
367 alsa_device = i->second;
372 acquire_device(alsa_device.c_str());
373 _pcmi = new Alsa_pcmi (alsa_device.c_str(), alsa_device.c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
374 switch (_pcmi->state ()) {
375 case 0: /* OK */ break;
376 case -1: PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg; break;
377 case -2: PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg; break;
378 case -3: PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.") << endmsg; break;
379 case -4: PBD::error << _("AlsaAudioBackend: cannot set requested period size.") << endmsg; break;
380 case -5: PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.") << endmsg; break;
381 case -6: PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg; break;
382 default: PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg; break;
384 if (_pcmi->state ()) {
385 delete _pcmi; _pcmi = 0;
393 if (_n_outputs != _pcmi->nplay ()) {
394 if (_n_outputs == 0) {
395 _n_outputs = _pcmi->nplay ();
397 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
399 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
402 if (_n_inputs != _pcmi->ncapt ()) {
403 if (_n_inputs == 0) {
404 _n_inputs = _pcmi->ncapt ();
406 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
408 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
411 if (_pcmi->fsize() != _samples_per_period) {
412 _samples_per_period = _pcmi->fsize();
413 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
416 if (_pcmi->fsamp() != _samplerate) {
417 _samplerate = _pcmi->fsamp();
418 engine.sample_rate_change (_samplerate);
419 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
422 if (for_latency_measurement) {
423 _systemic_input_latency = 0;
424 _systemic_output_latency = 0;
427 register_system_midi_ports();
429 if (register_system_audio_ports()) {
430 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
431 delete _pcmi; _pcmi = 0;
435 if (engine.reestablish_ports ()) {
436 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
437 delete _pcmi; _pcmi = 0;
441 engine.buffer_size_change (_samples_per_period);
442 engine.reconnect_ports ();
445 if (_realtime_pthread_create (SCHED_FIFO, -20,
446 &_main_thread, pthread_process, this))
448 if (pthread_create (&_main_thread, NULL, pthread_process, this))
450 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
451 delete _pcmi; _pcmi = 0;
455 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
460 while (!_active && --timeout > 0) { Glib::usleep (1000); }
462 if (timeout == 0 || !_active) {
463 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
464 delete _pcmi; _pcmi = 0;
473 AlsaAudioBackend::stop ()
481 if (pthread_join (_main_thread, &status)) {
482 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
486 while (!_rmidi_out.empty ()) {
487 AlsaRawMidiIO *m = _rmidi_out.back ();
489 _rmidi_out.pop_back ();
492 while (!_rmidi_in.empty ()) {
493 AlsaRawMidiIO *m = _rmidi_in.back ();
495 _rmidi_in.pop_back ();
499 unregister_system_ports();
500 delete _pcmi; _pcmi = 0;
501 return (_active == false) ? 0 : -1;
505 AlsaAudioBackend::freewheel (bool onoff)
507 if (onoff == _freewheeling) {
510 _freewheeling = onoff;
511 engine.freewheel_callback (onoff);
516 AlsaAudioBackend::dsp_load () const
518 return 100.f * _dsp_load;
522 AlsaAudioBackend::raw_buffer_size (DataType t)
525 case DataType::AUDIO:
526 return _samples_per_period * sizeof(Sample);
528 return _max_buffer_size; // XXX not really limited
535 AlsaAudioBackend::sample_time ()
537 return _processed_samples;
541 AlsaAudioBackend::sample_time_at_cycle_start ()
543 return _processed_samples;
547 AlsaAudioBackend::samples_since_cycle_start ()
554 AlsaAudioBackend::alsa_process_thread (void *arg)
556 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
557 boost::function<void ()> f = td->f;
564 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
568 size_t stacksize = 100000;
570 pthread_attr_init (&attr);
571 pthread_attr_setstacksize (&attr, stacksize);
572 ThreadData* td = new ThreadData (this, func, stacksize);
574 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
575 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
576 pthread_attr_destroy (&attr);
579 pthread_attr_destroy (&attr);
581 _threads.push_back (thread_id);
586 AlsaAudioBackend::join_process_threads ()
590 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
593 if (pthread_join (*i, &status)) {
594 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
603 AlsaAudioBackend::in_process_thread ()
605 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
607 if (pthread_equal (*i, pthread_self ()) != 0) {
615 AlsaAudioBackend::process_thread_count ()
617 return _threads.size ();
621 AlsaAudioBackend::update_latencies ()
628 AlsaAudioBackend::private_handle () const
634 AlsaAudioBackend::my_name () const
636 return _instance_name;
640 AlsaAudioBackend::available () const
642 return _run && _active;
646 AlsaAudioBackend::port_name_size () const
652 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
654 if (!valid_port (port)) {
655 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
658 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
662 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
664 if (!valid_port (port)) {
665 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
666 return std::string ();
668 return static_cast<AlsaPort*>(port)->name ();
671 PortEngine::PortHandle
672 AlsaAudioBackend::get_port_by_name (const std::string& name) const
674 PortHandle port = (PortHandle) find_port (name);
679 AlsaAudioBackend::get_ports (
680 const std::string& port_name_pattern,
681 DataType type, PortFlags flags,
682 std::vector<std::string>& port_names) const
686 bool use_regexp = false;
687 if (port_name_pattern.size () > 0) {
688 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
692 for (size_t i = 0; i < _ports.size (); ++i) {
693 AlsaPort* port = _ports[i];
694 if ((port->type () == type) && (port->flags () & flags)) {
695 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
696 port_names.push_back (port->name ());
702 regfree (&port_regex);
708 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
710 if (!valid_port (port)) {
711 return DataType::NIL;
713 return static_cast<AlsaPort*>(port)->type ();
716 PortEngine::PortHandle
717 AlsaAudioBackend::register_port (
718 const std::string& name,
719 ARDOUR::DataType type,
720 ARDOUR::PortFlags flags)
722 if (name.size () == 0) { return 0; }
723 if (flags & IsPhysical) { return 0; }
724 return add_port (_instance_name + ":" + name, type, flags);
727 PortEngine::PortHandle
728 AlsaAudioBackend::add_port (
729 const std::string& name,
730 ARDOUR::DataType type,
731 ARDOUR::PortFlags flags)
733 assert(name.size ());
734 if (find_port (name)) {
735 PBD::error << _("AlsaBackend::register_port: Port already exists:")
736 << " (" << name << ")" << endmsg;
739 AlsaPort* port = NULL;
741 case DataType::AUDIO:
742 port = new AlsaAudioPort (*this, name, flags);
745 port = new AlsaMidiPort (*this, name, flags);
748 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
752 _ports.push_back (port);
758 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
760 if (!valid_port (port_handle)) {
761 PBD::error << _("AlsaBackend::unregister_port: Invalid Port.") << endmsg;
763 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
764 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
765 if (i == _ports.end ()) {
766 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
769 disconnect_all(port_handle);
775 AlsaAudioBackend::register_system_audio_ports()
779 const int a_ins = _n_inputs > 0 ? _n_inputs : 2;
780 const int a_out = _n_outputs > 0 ? _n_outputs : 2;
783 lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_input_latency;
784 for (int i = 1; i <= a_ins; ++i) {
786 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
787 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
789 set_latency_range (p, false, lr);
790 _system_inputs.push_back(static_cast<AlsaPort*>(p));
793 lr.min = lr.max = _samples_per_period * _periods_per_cycle + _systemic_output_latency;
794 for (int i = 1; i <= a_out; ++i) {
796 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
797 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
799 set_latency_range (p, false, lr);
800 _system_outputs.push_back(static_cast<AlsaPort*>(p));
806 AlsaAudioBackend::register_system_midi_ports()
809 std::vector<std::string> devices;
811 if (_midi_device == _("-None-")) {
814 else if (_midi_device == _("-All-")) {
815 std::map<std::string, std::string> devmap;
816 get_alsa_rawmidi_device_names(devmap);
817 for (std::map<std::string, std::string>::const_iterator i = devmap.begin (); i != devmap.end(); ++i) {
818 devices.push_back (i->second);
821 std::map<std::string, std::string> devmap;
822 get_alsa_rawmidi_device_names(devmap);
823 for (std::map<std::string, std::string>::const_iterator i = devmap.begin (); i != devmap.end(); ++i) {
824 if (i->first == _midi_device) {
825 devices.push_back (i->second);
831 for (std::vector<std::string>::const_iterator i = devices.begin (); i != devices.end (); ++i) {
833 AlsaRawMidiOut *mout = new AlsaRawMidiOut (i->c_str());
834 if (mout->state ()) {
835 PBD::warning << string_compose (
836 _("AlsaRawMidiOut: failed to open midi device '%1'."), *i)
840 mout->setup_timing(_samples_per_period, _samplerate);
841 mout->sync_time (g_get_monotonic_time());
842 if (mout->start ()) {
843 PBD::warning << string_compose (
844 _("AlsaRawMidiOut: failed to start midi device '%1'."), *i)
848 _rmidi_out.push_back (mout);
852 AlsaRawMidiIn *midin = new AlsaRawMidiIn (i->c_str());
853 if (midin->state ()) {
854 PBD::warning << string_compose (
855 _("AlsaRawMidiIn: failed to open midi device '%1'."), *i)
859 midin->setup_timing(_samples_per_period, _samplerate);
860 midin->sync_time (g_get_monotonic_time());
861 if (midin->start ()) {
862 PBD::warning << string_compose (
863 _("AlsaRawMidiIn: failed to start midi device '%1'."), *i)
867 _rmidi_in.push_back (midin);
872 const int m_ins = _rmidi_in.size();
873 const int m_out = _rmidi_out.size();
875 lr.min = lr.max = _samples_per_period + _systemic_input_latency;
876 for (int i = 1; i <= m_ins; ++i) {
878 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", i);
879 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
881 set_latency_range (p, false, lr);
882 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
885 lr.min = lr.max = _samples_per_period + _systemic_output_latency;
886 for (int i = 1; i <= m_out; ++i) {
888 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", i);
889 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
891 set_latency_range (p, false, lr);
892 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
899 AlsaAudioBackend::unregister_system_ports()
902 _system_inputs.clear();
903 _system_outputs.clear();
904 _system_midi_in.clear();
905 _system_midi_out.clear();
906 while (i < _ports.size ()) {
907 AlsaPort* port = _ports[i];
908 if (port->is_physical () && port->is_terminal ()) {
909 port->disconnect_all ();
910 _ports.erase (_ports.begin() + i);
918 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
920 AlsaPort* src_port = find_port (src);
921 AlsaPort* dst_port = find_port (dst);
924 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
925 << " (" << src <<")" << endmsg;
929 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
930 << " (" << dst <<")" << endmsg;
933 return src_port->connect (dst_port);
937 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
939 AlsaPort* src_port = find_port (src);
940 AlsaPort* dst_port = find_port (dst);
942 if (!src_port || !dst_port) {
943 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
946 return src_port->disconnect (dst_port);
950 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
952 AlsaPort* dst_port = find_port (dst);
953 if (!valid_port (src)) {
954 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
958 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
959 << " (" << dst << ")" << endmsg;
962 return static_cast<AlsaPort*>(src)->connect (dst_port);
966 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
968 AlsaPort* dst_port = find_port (dst);
969 if (!valid_port (src) || !dst_port) {
970 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
973 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
977 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
979 if (!valid_port (port)) {
980 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
983 static_cast<AlsaPort*>(port)->disconnect_all ();
988 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
990 if (!valid_port (port)) {
991 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
994 return static_cast<AlsaPort*>(port)->is_connected ();
998 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1000 AlsaPort* dst_port = find_port (dst);
1001 if (!valid_port (src) || !dst_port) {
1002 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1005 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1009 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1011 if (!valid_port (port)) {
1012 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1015 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1019 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1021 if (!valid_port (port)) {
1022 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1026 assert (0 == names.size ());
1028 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1030 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1031 names.push_back ((*i)->name ());
1034 return (int)names.size ();
1039 AlsaAudioBackend::midi_event_get (
1040 pframes_t& timestamp,
1041 size_t& size, uint8_t** buf, void* port_buffer,
1042 uint32_t event_index)
1044 assert (buf && port_buffer);
1045 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1046 if (event_index >= source.size ()) {
1049 AlsaMidiEvent * const event = source[event_index].get ();
1051 timestamp = event->timestamp ();
1052 size = event->size ();
1053 *buf = event->data ();
1058 AlsaAudioBackend::midi_event_put (
1060 pframes_t timestamp,
1061 const uint8_t* buffer, size_t size)
1063 assert (buffer && port_buffer);
1064 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1065 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1066 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1067 (pframes_t)dst.back ()->timestamp (), timestamp);
1070 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1075 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1077 assert (port_buffer);
1078 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1082 AlsaAudioBackend::midi_clear (void* port_buffer)
1084 assert (port_buffer);
1085 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1093 AlsaAudioBackend::can_monitor_input () const
1099 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1105 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1111 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1116 /* Latency management */
1119 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1121 if (!valid_port (port)) {
1122 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1124 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1128 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1130 if (!valid_port (port)) {
1131 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1137 return static_cast<AlsaPort*>(port)->latency_range (for_playback);
1140 /* Discovering physical ports */
1143 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1145 if (!valid_port (port)) {
1146 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1149 return static_cast<AlsaPort*>(port)->is_physical ();
1153 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1155 for (size_t i = 0; i < _ports.size (); ++i) {
1156 AlsaPort* port = _ports[i];
1157 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1158 port_names.push_back (port->name ());
1164 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1166 for (size_t i = 0; i < _ports.size (); ++i) {
1167 AlsaPort* port = _ports[i];
1168 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1169 port_names.push_back (port->name ());
1175 AlsaAudioBackend::n_physical_outputs () const
1179 for (size_t i = 0; i < _ports.size (); ++i) {
1180 AlsaPort* port = _ports[i];
1181 if (port->is_output () && port->is_physical ()) {
1182 switch (port->type ()) {
1183 case DataType::AUDIO: ++n_audio; break;
1184 case DataType::MIDI: ++n_midi; break;
1190 cc.set (DataType::AUDIO, n_audio);
1191 cc.set (DataType::MIDI, n_midi);
1196 AlsaAudioBackend::n_physical_inputs () const
1200 for (size_t i = 0; i < _ports.size (); ++i) {
1201 AlsaPort* port = _ports[i];
1202 if (port->is_input () && port->is_physical ()) {
1203 switch (port->type ()) {
1204 case DataType::AUDIO: ++n_audio; break;
1205 case DataType::MIDI: ++n_midi; break;
1211 cc.set (DataType::AUDIO, n_audio);
1212 cc.set (DataType::MIDI, n_midi);
1216 /* Getting access to the data buffer for a port */
1219 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1222 assert (valid_port (port));
1223 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1226 /* Engine Process */
1228 AlsaAudioBackend::main_process_thread ()
1230 AudioEngine::thread_init_callback (this);
1232 _processed_samples = 0;
1234 uint64_t clock1, clock2;
1235 clock1 = g_get_monotonic_time();
1236 _pcmi->pcm_start ();
1237 int no_proc_errors = 0;
1242 if (!_freewheeling) {
1243 nr = _pcmi->pcm_wait ();
1245 if (_pcmi->state () > 0) {
1249 if (_pcmi->state () < 0 || no_proc_errors > 50) {
1250 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1253 while (nr >= (long)_samples_per_period) {
1255 clock1 = g_get_monotonic_time();
1258 _pcmi->capt_init (_samples_per_period);
1259 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1260 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1262 _pcmi->capt_done (_samples_per_period);
1266 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1267 assert (_rmidi_in.size() > i);
1268 AlsaRawMidiIn *rm = static_cast<AlsaRawMidiIn*>(_rmidi_in.at(i));
1269 void *bptr = (*it)->get_buffer(0);
1271 uint8_t data[64]; // match MaxAlsaRawEventSize in alsa_rawmidi.cc
1272 size_t size = sizeof(data);
1274 while (rm->recv_event (time, data, size)) {
1275 midi_event_put(bptr, time, data, size);
1276 size = sizeof(data);
1278 rm->sync_time (clock1);
1281 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1282 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1285 if (engine.process_callback (_samples_per_period)) {
1293 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1294 assert (_rmidi_out.size() > i);
1295 AlsaRawMidiOut *rm = static_cast<AlsaRawMidiOut*>(_rmidi_out.at(i));
1296 const AlsaMidiBuffer *src = static_cast<const AlsaMidiBuffer*>((*it)->get_buffer(0));
1297 rm->sync_time (clock1); // ?? use clock pre DSP load?
1298 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1299 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1303 /* write back audio */
1305 _pcmi->play_init (_samples_per_period);
1306 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1307 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1309 for (; i < _pcmi->nplay (); ++i) {
1310 _pcmi->clear_chan (i, _samples_per_period);
1312 _pcmi->play_done (_samples_per_period);
1313 nr -= _samples_per_period;
1314 _processed_samples += _samples_per_period;
1316 /* calculate DSP load */
1317 clock2 = g_get_monotonic_time();
1318 const int64_t elapsed_time = clock2 - clock1;
1319 const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
1320 _dsp_load = elapsed_time / (float) nomial_time;
1323 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1326 fprintf(stderr, "ALSA x-run read: %.1f ms, write: %.1f ms\n",
1327 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1332 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1333 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1335 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1336 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1339 if (engine.process_callback (_samples_per_period)) {
1344 Glib::usleep (100); // don't hog cpu
1347 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1348 while (!_port_connection_queue.empty ()) {
1349 PortConnectData *c = _port_connection_queue.back ();
1350 manager.connect_callback (c->a, c->b, c->c);
1351 _port_connection_queue.pop_back ();
1354 pthread_mutex_unlock (&_port_callback_mutex);
1361 engine.halted_callback("ALSA I/O error.");
1367 /******************************************************************************/
1369 static boost::shared_ptr<AlsaAudioBackend> _instance;
1371 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1372 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1373 static int deinstantiate ();
1374 static bool already_configured ();
1376 static ARDOUR::AudioBackendInfo _descriptor = {
1384 static boost::shared_ptr<AudioBackend>
1385 backend_factory (AudioEngine& e)
1388 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1394 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1396 s_instance_name = arg1;
1408 already_configured ()
1413 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1415 return &_descriptor;
1419 /******************************************************************************/
1420 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1425 _capture_latency_range.min = 0;
1426 _capture_latency_range.max = 0;
1427 _playback_latency_range.min = 0;
1428 _playback_latency_range.max = 0;
1431 AlsaPort::~AlsaPort () {
1436 int AlsaPort::connect (AlsaPort *port)
1439 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1443 if (type () != port->type ()) {
1444 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
1448 if (is_output () && port->is_output ()) {
1449 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
1453 if (is_input () && port->is_input ()) {
1454 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
1459 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
1463 if (is_connected (port)) {
1464 #if 0 // don't bother to warn about this for now. just ignore it
1465 PBD::error << _("AlsaPort::connect (): ports are already connected:")
1466 << " (" << name () << ") -> (" << port->name () << ")"
1472 _connect (port, true);
1477 void AlsaPort::_connect (AlsaPort *port, bool callback)
1479 _connections.push_back (port);
1481 port->_connect (this, false);
1482 _alsa_backend.port_connect_callback (name(), port->name(), true);
1486 int AlsaPort::disconnect (AlsaPort *port)
1489 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
1493 if (!is_connected (port)) {
1494 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
1495 << " (" << name () << ") -> (" << port->name () << ")"
1499 _disconnect (port, true);
1503 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
1505 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
1507 assert (it != _connections.end ());
1509 _connections.erase (it);
1512 port->_disconnect (this, false);
1513 _alsa_backend.port_connect_callback (name(), port->name(), false);
1518 void AlsaPort::disconnect_all ()
1520 while (!_connections.empty ()) {
1521 _connections.back ()->_disconnect (this, false);
1522 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
1523 _connections.pop_back ();
1528 AlsaPort::is_connected (const AlsaPort *port) const
1530 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
1533 bool AlsaPort::is_physically_connected () const
1535 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
1536 if ((*it)->is_physical ()) {
1543 /******************************************************************************/
1545 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1546 : AlsaPort (b, name, flags)
1548 memset (_buffer, 0, sizeof (_buffer));
1549 mlock(_buffer, sizeof (_buffer));
1552 AlsaAudioPort::~AlsaAudioPort () { }
1554 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
1557 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
1558 if (it == get_connections ().end ()) {
1559 memset (_buffer, 0, n_samples * sizeof (Sample));
1561 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
1562 assert (source && source->is_output ());
1563 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
1564 while (++it != get_connections ().end ()) {
1565 source = static_cast<const AlsaAudioPort*>(*it);
1566 assert (source && source->is_output ());
1567 Sample* dst = buffer ();
1568 const Sample* src = source->const_buffer ();
1569 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
1579 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1580 : AlsaPort (b, name, flags)
1585 AlsaMidiPort::~AlsaMidiPort () { }
1587 struct MidiEventSorter {
1588 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
1593 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
1597 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
1598 i != get_connections ().end ();
1600 const AlsaMidiBuffer src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
1601 for (AlsaMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
1602 _buffer.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
1605 std::sort (_buffer.begin (), _buffer.end (), MidiEventSorter());
1610 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
1612 , _timestamp (timestamp)
1616 _data = (uint8_t*) malloc (size);
1617 memcpy (_data, data, size);
1621 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
1622 : _size (other.size ())
1623 , _timestamp (other.timestamp ())
1626 if (other.size () && other.const_data ()) {
1627 _data = (uint8_t*) malloc (other.size ());
1628 memcpy (_data, other.const_data (), other.size ());
1632 AlsaMidiEvent::~AlsaMidiEvent () {