2 * Copyright (C) 2014 Robin Gareus <robin@gareus.org>
3 * Copyright (C) 2013 Paul Davis
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "alsa_audiobackend.h"
27 #include "rt_thread.h"
29 #include "pbd/compose.h"
30 #include "pbd/error.h"
31 #include "pbd/file_utils.h"
32 #include "ardour/filesystem_paths.h"
33 #include "ardour/port_manager.h"
34 #include "ardouralsautil/devicelist.h"
37 using namespace ARDOUR;
39 static std::string s_instance_name;
40 size_t AlsaAudioBackend::_max_buffer_size = 8192;
41 std::vector<std::string> AlsaAudioBackend::_midi_options;
42 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_input_audio_device_status;
43 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_output_audio_device_status;
44 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_duplex_audio_device_status;
45 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_midi_device_status;
47 ALSADeviceInfo AlsaAudioBackend::_input_audio_device_info;
48 ALSADeviceInfo AlsaAudioBackend::_output_audio_device_info;
50 AlsaAudioBackend::AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info)
51 : AudioBackend (e, info)
56 , _freewheeling (false)
57 , _measure_latency (false)
58 , _last_process_start (0)
59 , _input_audio_device("")
60 , _output_audio_device("")
61 , _midi_driver_option(get_standard_device_name(DeviceNone))
62 , _device_reservation(0)
64 , _samples_per_period (1024)
65 , _periods_per_cycle (2)
68 , _systemic_audio_input_latency (0)
69 , _systemic_audio_output_latency (0)
71 , _processed_samples (0)
72 , _port_change_flag (false)
76 _instance_name = s_instance_name;
77 pthread_mutex_init (&_port_callback_mutex, 0);
78 _input_audio_device_info.valid = false;
79 _output_audio_device_info.valid = false;
82 AlsaAudioBackend::~AlsaAudioBackend ()
84 pthread_mutex_destroy (&_port_callback_mutex);
87 /* AUDIOBACKEND API */
90 AlsaAudioBackend::name () const
96 AlsaAudioBackend::is_realtime () const
101 std::vector<AudioBackend::DeviceStatus>
102 AlsaAudioBackend::enumerate_devices () const
104 _duplex_audio_device_status.clear();
105 std::map<std::string, std::string> devices;
106 get_alsa_audio_device_names(devices);
107 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
108 if (_input_audio_device == "") _input_audio_device = i->first;
109 if (_output_audio_device == "") _output_audio_device = i->first;
110 _duplex_audio_device_status.push_back (DeviceStatus (i->first, true));
112 return _duplex_audio_device_status;
115 std::vector<AudioBackend::DeviceStatus>
116 AlsaAudioBackend::enumerate_input_devices () const
118 _input_audio_device_status.clear();
119 std::map<std::string, std::string> devices;
120 get_alsa_audio_device_names(devices, HalfDuplexIn);
121 _input_audio_device_status.push_back (DeviceStatus (get_standard_device_name(DeviceNone), true));
122 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
123 if (_input_audio_device == "") _input_audio_device = i->first;
124 _input_audio_device_status.push_back (DeviceStatus (i->first, true));
126 return _input_audio_device_status;
129 std::vector<AudioBackend::DeviceStatus>
130 AlsaAudioBackend::enumerate_output_devices () const
132 _output_audio_device_status.clear();
133 std::map<std::string, std::string> devices;
134 get_alsa_audio_device_names(devices, HalfDuplexOut);
135 _output_audio_device_status.push_back (DeviceStatus (get_standard_device_name(DeviceNone), true));
136 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
137 if (_output_audio_device == "") _output_audio_device = i->first;
138 _output_audio_device_status.push_back (DeviceStatus (i->first, true));
140 return _output_audio_device_status;
144 AlsaAudioBackend::reservation_stdout (std::string d, size_t /* s */)
146 if (d.substr(0, 19) == "Acquired audio-card") {
147 _reservation_succeeded = true;
152 AlsaAudioBackend::release_device()
154 _reservation_connection.drop_connections();
155 ARDOUR::SystemExec * tmp = _device_reservation;
156 _device_reservation = 0;
161 AlsaAudioBackend::acquire_device(const char* device_name)
163 /* This is quick hack, ideally we'll link against libdbus and implement a dbus-listener
164 * that owns the device. here we try to get away by just requesting it and then block it...
165 * (pulseaudio periodically checks anyway)
167 * dbus-send --session --print-reply --type=method_call --dest=org.freedesktop.ReserveDevice1.Audio2 /org/freedesktop/ReserveDevice1/Audio2 org.freedesktop.ReserveDevice1.RequestRelease int32:4
168 * -> should not return 'boolean false'
170 int device_number = card_to_num(device_name);
171 if (device_number < 0) return false;
173 assert(_device_reservation == 0);
174 _reservation_succeeded = false;
176 std::string request_device_exe;
177 if (!PBD::find_file (
178 PBD::Searchpath(Glib::build_filename(ARDOUR::ardour_dll_directory(), "ardouralsautil")
179 + G_SEARCHPATH_SEPARATOR_S + ARDOUR::ardour_dll_directory()),
180 "ardour-request-device", request_device_exe))
182 PBD::warning << "ardour-request-device binary was not found..'" << endmsg;
189 argp=(char**) calloc(5,sizeof(char*));
190 argp[0] = strdup(request_device_exe.c_str());
191 argp[1] = strdup("-P");
192 snprintf(tmp, sizeof(tmp), "%d", getpid());
193 argp[2] = strdup(tmp);
194 snprintf(tmp, sizeof(tmp), "Audio%d", device_number);
195 argp[3] = strdup(tmp);
198 _device_reservation = new ARDOUR::SystemExec(request_device_exe, argp);
199 _device_reservation->ReadStdout.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::reservation_stdout, this, _1 ,_2));
200 _device_reservation->Terminated.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::release_device, this));
201 if (_device_reservation->start(0)) {
202 PBD::warning << _("AlsaAudioBackend: Device Request failed.") << endmsg;
207 // wait to check if reservation suceeded.
208 int timeout = 500; // 5 sec
209 while (_device_reservation && !_reservation_succeeded && --timeout > 0) {
212 if (timeout == 0 || !_reservation_succeeded) {
213 PBD::warning << _("AlsaAudioBackend: Device Reservation failed.") << endmsg;
221 AlsaAudioBackend::available_sample_rates2 (const std::string& input_device, const std::string& output_device) const
223 std::vector<float> sr;
224 if (input_device == get_standard_device_name(DeviceNone) && output_device == get_standard_device_name(DeviceNone)) {
227 else if (input_device == get_standard_device_name(DeviceNone)) {
228 sr = available_sample_rates (output_device);
230 else if (output_device == get_standard_device_name(DeviceNone)) {
231 sr = available_sample_rates (input_device);
233 std::vector<float> sr_in = available_sample_rates (input_device);
234 std::vector<float> sr_out = available_sample_rates (output_device);
235 std::set_intersection (sr_in.begin(), sr_in.end(), sr_out.begin(), sr_out.end(), std::back_inserter(sr));
241 AlsaAudioBackend::available_sample_rates (const std::string& device) const
243 ALSADeviceInfo *nfo = NULL;
244 std::vector<float> sr;
245 if (device == get_standard_device_name(DeviceNone)) {
248 if (device == _input_audio_device && _input_audio_device_info.valid) {
249 nfo = &_input_audio_device_info;
251 else if (device == _output_audio_device && _output_audio_device_info.valid) {
252 nfo = &_output_audio_device_info;
255 static const float avail_rates [] = { 8000, 22050.0, 24000.0, 44100.0, 48000.0, 88200.0, 96000.0, 176400.0, 192000.0 };
257 for (size_t i = 0 ; i < sizeof(avail_rates) / sizeof(float); ++i) {
258 if (!nfo || (avail_rates[i] >= nfo->min_rate && avail_rates[i] <= nfo->max_rate)) {
259 sr.push_back (avail_rates[i]);
266 std::vector<uint32_t>
267 AlsaAudioBackend::available_buffer_sizes2 (const std::string& input_device, const std::string& output_device) const
269 std::vector<uint32_t> bs;
270 if (input_device == get_standard_device_name(DeviceNone) && output_device == get_standard_device_name(DeviceNone)) {
273 else if (input_device == get_standard_device_name(DeviceNone)) {
274 bs = available_buffer_sizes (output_device);
276 else if (output_device == get_standard_device_name(DeviceNone)) {
277 bs = available_buffer_sizes (input_device);
279 std::vector<uint32_t> bs_in = available_buffer_sizes (input_device);
280 std::vector<uint32_t> bs_out = available_buffer_sizes (output_device);
281 std::set_intersection (bs_in.begin(), bs_in.end(), bs_out.begin(), bs_out.end(), std::back_inserter(bs));
286 std::vector<uint32_t>
287 AlsaAudioBackend::available_buffer_sizes (const std::string& device) const
289 ALSADeviceInfo *nfo = NULL;
290 std::vector<uint32_t> bs;
291 if (device == get_standard_device_name(DeviceNone)) {
294 if (device == _input_audio_device && _input_audio_device_info.valid) {
295 nfo = &_input_audio_device_info;
297 else if (device == _output_audio_device && _output_audio_device_info.valid) {
298 nfo = &_output_audio_device_info;
301 static const unsigned long avail_sizes [] = { 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192 };
303 for (size_t i = 0 ; i < sizeof(avail_sizes) / sizeof(unsigned long); ++i) {
304 if (!nfo || (avail_sizes[i] >= nfo->min_size && avail_sizes[i] <= nfo->max_size)) {
305 bs.push_back (avail_sizes[i]);
312 AlsaAudioBackend::available_input_channel_count (const std::string& device) const
314 if (device == get_standard_device_name(DeviceNone)) {
317 if (device == _input_audio_device && _input_audio_device_info.valid) {
318 return _input_audio_device_info.max_channels;
324 AlsaAudioBackend::available_output_channel_count (const std::string& device) const
326 if (device == get_standard_device_name(DeviceNone)) {
329 if (device == _output_audio_device && _output_audio_device_info.valid) {
330 return _output_audio_device_info.max_channels;
335 std::vector<uint32_t>
336 AlsaAudioBackend::available_period_sizes (const std::string& driver) const
338 std::vector<uint32_t> ps;
345 AlsaAudioBackend::can_change_sample_rate_when_running () const
351 AlsaAudioBackend::can_change_buffer_size_when_running () const
353 return false; // why not? :)
357 AlsaAudioBackend::set_input_device_name (const std::string& d)
359 if (_input_audio_device == d) {
362 _input_audio_device = d;
364 if (d == get_standard_device_name(DeviceNone)) {
365 _input_audio_device_info.valid = false;
368 std::string alsa_device;
369 std::map<std::string, std::string> devices;
371 get_alsa_audio_device_names(devices, HalfDuplexIn);
372 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
374 alsa_device = i->second;
378 if (alsa_device == "") {
379 _input_audio_device_info.valid = false;
382 /* device will be busy once used, hence cache the parameters */
383 /* return */ get_alsa_device_parameters (alsa_device.c_str(), true, &_input_audio_device_info);
388 AlsaAudioBackend::set_output_device_name (const std::string& d)
390 if (_output_audio_device == d) {
394 _output_audio_device = d;
396 if (d == get_standard_device_name(DeviceNone)) {
397 _output_audio_device_info.valid = false;
400 std::string alsa_device;
401 std::map<std::string, std::string> devices;
403 get_alsa_audio_device_names(devices, HalfDuplexOut);
404 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
406 alsa_device = i->second;
410 if (alsa_device == "") {
411 _output_audio_device_info.valid = false;
414 /* return */ get_alsa_device_parameters (alsa_device.c_str(), true, &_output_audio_device_info);
419 AlsaAudioBackend::set_device_name (const std::string& d)
422 rv |= set_input_device_name (d);
423 rv |= set_output_device_name (d);
428 AlsaAudioBackend::set_sample_rate (float sr)
430 if (sr <= 0) { return -1; }
432 engine.sample_rate_change (sr);
437 AlsaAudioBackend::set_peridod_size (uint32_t n)
439 if (n == 0 || n > 3) {
445 _periods_per_cycle = n;
450 AlsaAudioBackend::set_buffer_size (uint32_t bs)
452 if (bs <= 0 || bs >= _max_buffer_size) {
458 _samples_per_period = bs;
459 engine.buffer_size_change (bs);
464 AlsaAudioBackend::set_interleaved (bool yn)
466 if (!yn) { return 0; }
471 AlsaAudioBackend::set_input_channels (uint32_t cc)
478 AlsaAudioBackend::set_output_channels (uint32_t cc)
485 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
487 _systemic_audio_input_latency = sl;
489 update_systemic_audio_latencies();
495 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
497 _systemic_audio_output_latency = sl;
499 update_systemic_audio_latencies();
505 AlsaAudioBackend::set_systemic_midi_input_latency (std::string const device, uint32_t sl)
507 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
509 nfo->systemic_input_latency = sl;
510 if (_run && nfo->enabled) {
511 update_systemic_midi_latencies ();
517 AlsaAudioBackend::set_systemic_midi_output_latency (std::string const device, uint32_t sl)
519 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
521 nfo->systemic_output_latency = sl;
522 if (_run && nfo->enabled) {
523 update_systemic_midi_latencies ();
529 AlsaAudioBackend::update_systemic_audio_latencies ()
531 const uint32_t lcpp = (_periods_per_cycle - 2) * _samples_per_period;
534 lr.min = lr.max = lcpp + (_measure_latency ? 0 : _systemic_audio_input_latency);
535 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
536 set_latency_range (*it, true, lr);
539 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_output_latency);
540 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
541 set_latency_range (*it, false, lr);
547 AlsaAudioBackend::update_systemic_midi_latencies ()
550 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
551 assert (_rmidi_out.size() > i);
552 AlsaMidiOut *rm = _rmidi_out.at(i);
553 struct AlsaMidiDeviceInfo * nfo = midi_device_info (rm->name());
556 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
557 set_latency_range (*it, false, lr);
561 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
562 assert (_rmidi_in.size() > i);
563 AlsaMidiIO *rm = _rmidi_in.at(i);
564 struct AlsaMidiDeviceInfo * nfo = midi_device_info (rm->name());
567 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
568 set_latency_range (*it, true, lr);
573 /* Retrieving parameters */
575 AlsaAudioBackend::device_name () const
577 if (_input_audio_device != get_standard_device_name(DeviceNone)) {
578 return _input_audio_device;
580 if (_output_audio_device != get_standard_device_name(DeviceNone)) {
581 return _output_audio_device;
587 AlsaAudioBackend::input_device_name () const
589 return _input_audio_device;
593 AlsaAudioBackend::output_device_name () const
595 return _output_audio_device;
599 AlsaAudioBackend::sample_rate () const
605 AlsaAudioBackend::buffer_size () const
607 return _samples_per_period;
611 AlsaAudioBackend::period_size () const
613 return _periods_per_cycle;
617 AlsaAudioBackend::interleaved () const
623 AlsaAudioBackend::input_channels () const
629 AlsaAudioBackend::output_channels () const
635 AlsaAudioBackend::systemic_input_latency () const
637 return _systemic_audio_input_latency;
641 AlsaAudioBackend::systemic_output_latency () const
643 return _systemic_audio_output_latency;
647 AlsaAudioBackend::systemic_midi_input_latency (std::string const device) const
649 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
651 return nfo->systemic_input_latency;
655 AlsaAudioBackend::systemic_midi_output_latency (std::string const device) const
657 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
659 return nfo->systemic_output_latency;
663 struct AlsaAudioBackend::AlsaMidiDeviceInfo *
664 AlsaAudioBackend::midi_device_info(std::string const name) const {
665 for (std::map<std::string, struct AlsaMidiDeviceInfo*>::const_iterator i = _midi_devices.begin (); i != _midi_devices.end(); ++i) {
666 if (i->first == name) {
671 assert(_midi_driver_option != get_standard_device_name(DeviceNone));
673 std::map<std::string, std::string> devices;
674 if (_midi_driver_option == _("ALSA raw devices")) {
675 get_alsa_rawmidi_device_names(devices);
677 get_alsa_sequencer_names (devices);
680 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
681 if (i->first == name) {
682 _midi_devices[name] = new AlsaMidiDeviceInfo();
683 return _midi_devices[name];
689 std::vector<std::string>
690 AlsaAudioBackend::enumerate_midi_options () const
692 if (_midi_options.empty()) {
693 _midi_options.push_back (_("ALSA raw devices"));
694 _midi_options.push_back (_("ALSA sequencer"));
695 _midi_options.push_back (get_standard_device_name(DeviceNone));
697 return _midi_options;
700 std::vector<AudioBackend::DeviceStatus>
701 AlsaAudioBackend::enumerate_midi_devices () const
703 _midi_device_status.clear();
704 std::map<std::string, std::string> devices;
706 if (_midi_driver_option == _("ALSA raw devices")) {
707 get_alsa_rawmidi_device_names (devices);
709 else if (_midi_driver_option == _("ALSA sequencer")) {
710 get_alsa_sequencer_names (devices);
713 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
714 _midi_device_status.push_back (DeviceStatus (i->first, true));
716 return _midi_device_status;
720 AlsaAudioBackend::set_midi_option (const std::string& opt)
722 if (opt != get_standard_device_name(DeviceNone) && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
725 if (_run && _midi_driver_option != opt) {
728 _midi_driver_option = opt;
733 AlsaAudioBackend::midi_option () const
735 return _midi_driver_option;
739 AlsaAudioBackend::set_midi_device_enabled (std::string const device, bool enable)
741 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
743 const bool prev_enabled = nfo->enabled;
744 nfo->enabled = enable;
746 if (_run && prev_enabled != enable) {
748 // add ports for the given device
749 register_system_midi_ports(device);
751 // remove all ports provided by the given device
753 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end ();) {
754 assert (_rmidi_out.size() > i);
755 AlsaMidiOut *rm = _rmidi_out.at(i);
756 if (rm->name () != device) { ++it; ++i; continue; }
757 it = _system_midi_out.erase (it);
758 unregister_port (*it);
760 _rmidi_out.erase (_rmidi_out.begin() + i);
765 for (std::vector<AlsaPort*>::iterator it = _system_midi_in.begin (); it != _system_midi_in.end ();) {
766 assert (_rmidi_in.size() > i);
767 AlsaMidiIn *rm = _rmidi_in.at(i);
768 if (rm->name () != device) { ++it; ++i; continue; }
769 it = _system_midi_in.erase (it);
770 unregister_port (*it);
772 _rmidi_in.erase (_rmidi_in.begin() + i);
776 update_systemic_midi_latencies ();
782 AlsaAudioBackend::midi_device_enabled (std::string const device) const
784 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
785 if (!nfo) return false;
791 static void * pthread_process (void *arg)
793 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
794 d->main_process_thread ();
800 AlsaAudioBackend::_start (bool for_latency_measurement)
802 if (!_active && _run) {
803 // recover from 'halted', reap threads
807 if (_active || _run) {
808 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
809 return BackendReinitializationError;
813 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
814 _system_inputs.clear();
815 _system_outputs.clear();
816 _system_midi_in.clear();
817 _system_midi_out.clear();
821 /* reset internal state */
823 _freewheeling = false;
825 _last_process_start = 0;
829 assert(_rmidi_in.size() == 0);
830 assert(_rmidi_out.size() == 0);
834 std::string audio_device;
835 std::string alsa_device;
836 std::map<std::string, std::string> devices;
838 if (_input_audio_device == get_standard_device_name(DeviceNone) && _output_audio_device == get_standard_device_name(DeviceNone)) {
839 PBD::error << _("AlsaAudioBackend: At least one of input or output device needs to be set.");
840 return AudioDeviceInvalidError;
843 if (_input_audio_device != _output_audio_device) {
844 if (_input_audio_device != get_standard_device_name(DeviceNone) && _output_audio_device != get_standard_device_name(DeviceNone)) {
845 PBD::error << _("AlsaAudioBackend: Cannot use two different devices.");
846 return AudioDeviceInvalidError;
848 if (_input_audio_device != get_standard_device_name(DeviceNone)) {
849 get_alsa_audio_device_names(devices, HalfDuplexIn);
850 audio_device = _input_audio_device;
853 get_alsa_audio_device_names(devices, HalfDuplexOut);
854 audio_device = _output_audio_device;
858 get_alsa_audio_device_names(devices);
859 audio_device = _input_audio_device;
863 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
864 if (i->first == audio_device) {
865 alsa_device = i->second;
869 if (alsa_device == "") {
870 PBD::error << _("AlsaAudioBackend: Cannot find configured device. Is it still connected?");
871 return AudioDeviceNotAvailableError;
874 acquire_device(alsa_device.c_str());
875 _pcmi = new Alsa_pcmi (
876 (duplex & 2) ? alsa_device.c_str() : NULL,
877 (duplex & 1) ? alsa_device.c_str() : NULL,
879 _samplerate, _samples_per_period,
880 _periods_per_cycle, /* _periods_per_cycle */ 2,
883 AudioBackend::ErrorCode error_code = NoError;
884 switch (_pcmi->state()) {
888 PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg;
889 error_code = AudioDeviceOpenError;
892 PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg;
893 error_code = AudioDeviceOpenError;
896 PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.")
898 error_code = SampleRateNotSupportedError;
901 PBD::error << _("AlsaAudioBackend: cannot set requested period size.")
903 error_code = PeriodSizeNotSupportedError;
906 PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.")
908 error_code = PeriodCountNotSupportedError;
911 PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg;
912 error_code = SampleFormatNotSupportedError;
915 PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg;
916 error_code = AudioDeviceOpenError;
920 if (_pcmi->state ()) {
921 delete _pcmi; _pcmi = 0;
930 if (_n_outputs != _pcmi->nplay ()) {
931 if (_n_outputs == 0) {
932 _n_outputs = _pcmi->nplay ();
934 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
936 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
939 if (_n_inputs != _pcmi->ncapt ()) {
940 if (_n_inputs == 0) {
941 _n_inputs = _pcmi->ncapt ();
943 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
945 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
948 if (_pcmi->fsize() != _samples_per_period) {
949 _samples_per_period = _pcmi->fsize();
950 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
953 if (_pcmi->fsamp() != _samplerate) {
954 _samplerate = _pcmi->fsamp();
955 engine.sample_rate_change (_samplerate);
956 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
959 _measure_latency = for_latency_measurement;
961 _midi_ins = _midi_outs = 0;
962 register_system_midi_ports();
964 if (register_system_audio_ports()) {
965 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
966 delete _pcmi; _pcmi = 0;
968 return PortRegistrationError;
971 engine.sample_rate_change (_samplerate);
972 engine.buffer_size_change (_samples_per_period);
974 if (engine.reestablish_ports ()) {
975 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
976 delete _pcmi; _pcmi = 0;
978 return PortReconnectError;
981 engine.reconnect_ports ();
983 _port_change_flag = false;
985 if (_realtime_pthread_create (SCHED_FIFO, -20, 100000,
986 &_main_thread, pthread_process, this))
988 if (pthread_create (&_main_thread, NULL, pthread_process, this))
990 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
991 delete _pcmi; _pcmi = 0;
994 return ProcessThreadStartError;
996 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
1001 while (!_active && --timeout > 0) { Glib::usleep (1000); }
1003 if (timeout == 0 || !_active) {
1004 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
1005 delete _pcmi; _pcmi = 0;
1008 return ProcessThreadStartError;
1015 AlsaAudioBackend::stop ()
1023 if (pthread_join (_main_thread, &status)) {
1024 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
1028 while (!_rmidi_out.empty ()) {
1029 AlsaMidiIO *m = _rmidi_out.back ();
1031 _rmidi_out.pop_back ();
1034 while (!_rmidi_in.empty ()) {
1035 AlsaMidiIO *m = _rmidi_in.back ();
1037 _rmidi_in.pop_back ();
1042 delete _pcmi; _pcmi = 0;
1043 _midi_ins = _midi_outs = 0;
1046 return (_active == false) ? 0 : -1;
1050 AlsaAudioBackend::freewheel (bool onoff)
1052 _freewheeling = onoff;
1057 AlsaAudioBackend::dsp_load () const
1059 return 100.f * _dsp_load;
1063 AlsaAudioBackend::raw_buffer_size (DataType t)
1066 case DataType::AUDIO:
1067 return _samples_per_period * sizeof(Sample);
1068 case DataType::MIDI:
1069 return _max_buffer_size; // XXX not really limited
1076 AlsaAudioBackend::sample_time ()
1078 return _processed_samples;
1082 AlsaAudioBackend::sample_time_at_cycle_start ()
1084 return _processed_samples;
1088 AlsaAudioBackend::samples_since_cycle_start ()
1090 if (!_active || !_run || _freewheeling || _freewheel) {
1093 if (_last_process_start == 0) {
1097 const int64_t elapsed_time_us = g_get_monotonic_time() - _last_process_start;
1098 return std::max((pframes_t)0, (pframes_t)rint(1e-6 * elapsed_time_us * _samplerate));
1103 AlsaAudioBackend::alsa_process_thread (void *arg)
1105 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
1106 boost::function<void ()> f = td->f;
1113 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
1115 pthread_t thread_id;
1116 pthread_attr_t attr;
1117 size_t stacksize = 100000;
1119 ThreadData* td = new ThreadData (this, func, stacksize);
1121 if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
1122 &thread_id, alsa_process_thread, td)) {
1123 pthread_attr_init (&attr);
1124 pthread_attr_setstacksize (&attr, stacksize);
1125 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
1126 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
1127 pthread_attr_destroy (&attr);
1130 pthread_attr_destroy (&attr);
1133 _threads.push_back (thread_id);
1138 AlsaAudioBackend::join_process_threads ()
1142 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
1145 if (pthread_join (*i, &status)) {
1146 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
1155 AlsaAudioBackend::in_process_thread ()
1157 if (pthread_equal (_main_thread, pthread_self()) != 0) {
1161 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
1163 if (pthread_equal (*i, pthread_self ()) != 0) {
1171 AlsaAudioBackend::process_thread_count ()
1173 return _threads.size ();
1177 AlsaAudioBackend::update_latencies ()
1179 // trigger latency callback in RT thread (locked graph)
1180 port_connect_add_remove_callback();
1183 /* PORTENGINE API */
1186 AlsaAudioBackend::private_handle () const
1192 AlsaAudioBackend::my_name () const
1194 return _instance_name;
1198 AlsaAudioBackend::available () const
1200 return _run && _active;
1204 AlsaAudioBackend::port_name_size () const
1210 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
1212 if (!valid_port (port)) {
1213 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
1216 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
1220 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
1222 if (!valid_port (port)) {
1223 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
1224 return std::string ();
1226 return static_cast<AlsaPort*>(port)->name ();
1229 PortEngine::PortHandle
1230 AlsaAudioBackend::get_port_by_name (const std::string& name) const
1232 PortHandle port = (PortHandle) find_port (name);
1237 AlsaAudioBackend::get_ports (
1238 const std::string& port_name_pattern,
1239 DataType type, PortFlags flags,
1240 std::vector<std::string>& port_names) const
1244 bool use_regexp = false;
1245 if (port_name_pattern.size () > 0) {
1246 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
1250 for (size_t i = 0; i < _ports.size (); ++i) {
1251 AlsaPort* port = _ports[i];
1252 if ((port->type () == type) && flags == (port->flags () & flags)) {
1253 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
1254 port_names.push_back (port->name ());
1260 regfree (&port_regex);
1266 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
1268 if (!valid_port (port)) {
1269 return DataType::NIL;
1271 return static_cast<AlsaPort*>(port)->type ();
1274 PortEngine::PortHandle
1275 AlsaAudioBackend::register_port (
1276 const std::string& name,
1277 ARDOUR::DataType type,
1278 ARDOUR::PortFlags flags)
1280 if (name.size () == 0) { return 0; }
1281 if (flags & IsPhysical) { return 0; }
1282 return add_port (_instance_name + ":" + name, type, flags);
1285 PortEngine::PortHandle
1286 AlsaAudioBackend::add_port (
1287 const std::string& name,
1288 ARDOUR::DataType type,
1289 ARDOUR::PortFlags flags)
1291 assert(name.size ());
1292 if (find_port (name)) {
1293 PBD::error << _("AlsaBackend::register_port: Port already exists:")
1294 << " (" << name << ")" << endmsg;
1297 AlsaPort* port = NULL;
1299 case DataType::AUDIO:
1300 port = new AlsaAudioPort (*this, name, flags);
1302 case DataType::MIDI:
1303 port = new AlsaMidiPort (*this, name, flags);
1306 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
1310 _ports.push_back (port);
1316 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
1321 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
1322 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
1323 if (i == _ports.end ()) {
1324 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
1327 disconnect_all(port_handle);
1333 AlsaAudioBackend::register_system_audio_ports()
1337 const int a_ins = _n_inputs;
1338 const int a_out = _n_outputs;
1340 const uint32_t lcpp = (_periods_per_cycle - 2) * _samples_per_period;
1343 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_input_latency);
1344 for (int i = 1; i <= a_ins; ++i) {
1346 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
1347 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1349 set_latency_range (p, false, lr);
1350 _system_inputs.push_back(static_cast<AlsaPort*>(p));
1353 lr.min = lr.max = lcpp + (_measure_latency ? 0 : _systemic_audio_output_latency);
1354 for (int i = 1; i <= a_out; ++i) {
1356 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
1357 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1359 set_latency_range (p, true, lr);
1360 _system_outputs.push_back(static_cast<AlsaPort*>(p));
1366 AlsaAudioBackend::register_system_midi_ports(const std::string device)
1368 std::map<std::string, std::string> devices;
1370 // TODO use consistent numbering when re-adding devices: _midi_ins, _midi_outs
1372 if (_midi_driver_option == get_standard_device_name(DeviceNone)) {
1374 } else if (_midi_driver_option == _("ALSA raw devices")) {
1375 get_alsa_rawmidi_device_names(devices);
1377 get_alsa_sequencer_names (devices);
1380 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
1381 if (!device.empty() && device != i->first) {
1384 struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first);
1386 if (!nfo->enabled) continue;
1389 if (_midi_driver_option == _("ALSA raw devices")) {
1390 mout = new AlsaRawMidiOut (i->first, i->second.c_str());
1392 mout = new AlsaSeqMidiOut (i->first, i->second.c_str());
1395 if (mout->state ()) {
1396 PBD::warning << string_compose (
1397 _("AlsaMidiOut: failed to open midi device '%1'."), i->second)
1401 mout->setup_timing(_samples_per_period, _samplerate);
1402 mout->sync_time (g_get_monotonic_time());
1403 if (mout->start ()) {
1404 PBD::warning << string_compose (
1405 _("AlsaMidiOut: failed to start midi device '%1'."), i->second)
1410 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", ++_midi_ins);
1411 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1417 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
1418 set_latency_range (p, true, lr);
1419 static_cast<AlsaMidiPort*>(p)->set_n_periods(_periods_per_cycle); // TODO check MIDI alignment
1420 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
1421 _rmidi_out.push_back (mout);
1426 if (_midi_driver_option == _("ALSA raw devices")) {
1427 midin = new AlsaRawMidiIn (i->first, i->second.c_str());
1429 midin = new AlsaSeqMidiIn (i->first, i->second.c_str());
1432 if (midin->state ()) {
1433 PBD::warning << string_compose (
1434 _("AlsaMidiIn: failed to open midi device '%1'."), i->second)
1438 midin->setup_timing(_samples_per_period, _samplerate);
1439 midin->sync_time (g_get_monotonic_time());
1440 if (midin->start ()) {
1441 PBD::warning << string_compose (
1442 _("AlsaMidiIn: failed to start midi device '%1'."), i->second)
1447 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", ++_midi_outs);
1448 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1455 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
1456 set_latency_range (p, false, lr);
1457 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
1458 _rmidi_in.push_back (midin);
1466 AlsaAudioBackend::unregister_ports (bool system_only)
1469 _system_inputs.clear();
1470 _system_outputs.clear();
1471 _system_midi_in.clear();
1472 _system_midi_out.clear();
1473 while (i < _ports.size ()) {
1474 AlsaPort* port = _ports[i];
1475 if (! system_only || (port->is_physical () && port->is_terminal ())) {
1476 port->disconnect_all ();
1478 _ports.erase (_ports.begin() + i);
1486 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
1488 AlsaPort* src_port = find_port (src);
1489 AlsaPort* dst_port = find_port (dst);
1492 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
1493 << " (" << src <<")" << endmsg;
1497 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
1498 << " (" << dst <<")" << endmsg;
1501 return src_port->connect (dst_port);
1505 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
1507 AlsaPort* src_port = find_port (src);
1508 AlsaPort* dst_port = find_port (dst);
1510 if (!src_port || !dst_port) {
1511 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1514 return src_port->disconnect (dst_port);
1518 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1520 AlsaPort* dst_port = find_port (dst);
1521 if (!valid_port (src)) {
1522 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1526 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1527 << " (" << dst << ")" << endmsg;
1530 return static_cast<AlsaPort*>(src)->connect (dst_port);
1534 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1536 AlsaPort* dst_port = find_port (dst);
1537 if (!valid_port (src) || !dst_port) {
1538 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1541 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1545 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1547 if (!valid_port (port)) {
1548 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1551 static_cast<AlsaPort*>(port)->disconnect_all ();
1556 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1558 if (!valid_port (port)) {
1559 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1562 return static_cast<AlsaPort*>(port)->is_connected ();
1566 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1568 AlsaPort* dst_port = find_port (dst);
1569 if (!valid_port (src) || !dst_port) {
1570 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1573 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1577 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1579 if (!valid_port (port)) {
1580 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1583 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1587 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1589 if (!valid_port (port)) {
1590 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1594 assert (0 == names.size ());
1596 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1598 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1599 names.push_back ((*i)->name ());
1602 return (int)names.size ();
1607 AlsaAudioBackend::midi_event_get (
1608 pframes_t& timestamp,
1609 size_t& size, uint8_t** buf, void* port_buffer,
1610 uint32_t event_index)
1612 assert (buf && port_buffer);
1613 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1614 if (event_index >= source.size ()) {
1617 AlsaMidiEvent * const event = source[event_index].get ();
1619 timestamp = event->timestamp ();
1620 size = event->size ();
1621 *buf = event->data ();
1626 AlsaAudioBackend::midi_event_put (
1628 pframes_t timestamp,
1629 const uint8_t* buffer, size_t size)
1631 assert (buffer && port_buffer);
1632 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1633 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1635 // nevermind, ::get_buffer() sorts events
1636 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1637 (pframes_t)dst.back ()->timestamp (), timestamp);
1640 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1645 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1647 assert (port_buffer);
1648 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1652 AlsaAudioBackend::midi_clear (void* port_buffer)
1654 assert (port_buffer);
1655 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1663 AlsaAudioBackend::can_monitor_input () const
1669 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1675 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1681 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1686 /* Latency management */
1689 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1691 if (!valid_port (port)) {
1692 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1694 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1698 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1701 if (!valid_port (port)) {
1702 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1707 AlsaPort *p = static_cast<AlsaPort*>(port);
1710 r = p->latency_range (for_playback);
1711 if (p->is_physical() && p->is_terminal()) {
1712 if (p->is_input() && for_playback) {
1713 r.min += _samples_per_period;
1714 r.max += _samples_per_period;
1716 if (p->is_output() && !for_playback) {
1717 r.min += _samples_per_period;
1718 r.max += _samples_per_period;
1724 /* Discovering physical ports */
1727 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1729 if (!valid_port (port)) {
1730 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1733 return static_cast<AlsaPort*>(port)->is_physical ();
1737 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1739 for (size_t i = 0; i < _ports.size (); ++i) {
1740 AlsaPort* port = _ports[i];
1741 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1742 port_names.push_back (port->name ());
1748 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1750 for (size_t i = 0; i < _ports.size (); ++i) {
1751 AlsaPort* port = _ports[i];
1752 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1753 port_names.push_back (port->name ());
1759 AlsaAudioBackend::n_physical_outputs () const
1763 for (size_t i = 0; i < _ports.size (); ++i) {
1764 AlsaPort* port = _ports[i];
1765 if (port->is_output () && port->is_physical ()) {
1766 switch (port->type ()) {
1767 case DataType::AUDIO: ++n_audio; break;
1768 case DataType::MIDI: ++n_midi; break;
1774 cc.set (DataType::AUDIO, n_audio);
1775 cc.set (DataType::MIDI, n_midi);
1780 AlsaAudioBackend::n_physical_inputs () const
1784 for (size_t i = 0; i < _ports.size (); ++i) {
1785 AlsaPort* port = _ports[i];
1786 if (port->is_input () && port->is_physical ()) {
1787 switch (port->type ()) {
1788 case DataType::AUDIO: ++n_audio; break;
1789 case DataType::MIDI: ++n_midi; break;
1795 cc.set (DataType::AUDIO, n_audio);
1796 cc.set (DataType::MIDI, n_midi);
1800 /* Getting access to the data buffer for a port */
1803 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1806 assert (valid_port (port));
1807 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1810 /* Engine Process */
1812 AlsaAudioBackend::main_process_thread ()
1814 AudioEngine::thread_init_callback (this);
1816 _processed_samples = 0;
1819 _pcmi->pcm_start ();
1820 int no_proc_errors = 0;
1821 const int bailout = 2 * _samplerate / _samples_per_period;
1823 manager.registration_callback();
1824 manager.graph_order_callback();
1830 if (_freewheeling != _freewheel) {
1831 _freewheel = _freewheeling;
1832 engine.freewheel_callback (_freewheel);
1836 nr = _pcmi->pcm_wait ();
1838 if (_pcmi->state () > 0) {
1842 if (_pcmi->state () < 0) {
1843 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1846 if (no_proc_errors > bailout) {
1849 _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."),
1855 while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) {
1857 clock1 = g_get_monotonic_time();
1860 _pcmi->capt_init (_samples_per_period);
1861 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1862 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1864 _pcmi->capt_done (_samples_per_period);
1866 /* de-queue incoming midi*/
1868 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1869 assert (_rmidi_in.size() > i);
1870 AlsaMidiIn *rm = _rmidi_in.at(i);
1871 void *bptr = (*it)->get_buffer(0);
1873 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1874 size_t size = sizeof(data);
1876 while (rm->recv_event (time, data, size)) {
1877 midi_event_put(bptr, time, data, size);
1878 size = sizeof(data);
1880 rm->sync_time (clock1);
1883 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1884 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1887 /* call engine process callback */
1888 _last_process_start = g_get_monotonic_time();
1889 if (engine.process_callback (_samples_per_period)) {
1895 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1896 static_cast<AlsaMidiPort*>(*it)->next_period();
1899 /* queue outgoing midi */
1901 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1902 assert (_rmidi_out.size() > i);
1903 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
1904 AlsaMidiOut *rm = _rmidi_out.at(i);
1905 rm->sync_time (clock1);
1906 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1907 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1911 /* write back audio */
1913 _pcmi->play_init (_samples_per_period);
1914 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1915 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1917 for (; i < _pcmi->nplay (); ++i) {
1918 _pcmi->clear_chan (i, _samples_per_period);
1920 _pcmi->play_done (_samples_per_period);
1921 nr -= _samples_per_period;
1922 _processed_samples += _samples_per_period;
1924 _dsp_load_calc.set_max_time(_samplerate, _samples_per_period);
1925 _dsp_load_calc.set_start_timestamp_us (clock1);
1926 _dsp_load_calc.set_stop_timestamp_us (g_get_monotonic_time());
1927 _dsp_load = _dsp_load_calc.get_dsp_load ();
1930 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1933 fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n",
1934 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1940 // zero audio input buffers
1941 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1942 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1945 clock1 = g_get_monotonic_time();
1947 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1948 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1949 AlsaMidiIn *rm = _rmidi_in.at(i);
1950 void *bptr = (*it)->get_buffer(0);
1951 midi_clear(bptr); // zero midi buffer
1953 // TODO add an API call for this.
1955 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1956 size_t size = sizeof(data);
1957 while (rm->recv_event (time, data, size)) {
1958 ; // discard midi-data from HW.
1960 rm->sync_time (clock1);
1963 _last_process_start = 0;
1964 if (engine.process_callback (_samples_per_period)) {
1970 // drop all outgoing MIDI messages
1971 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1972 void *bptr = (*it)->get_buffer(0);
1977 Glib::usleep (100); // don't hog cpu
1980 bool connections_changed = false;
1981 bool ports_changed = false;
1982 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1983 if (_port_change_flag) {
1984 ports_changed = true;
1985 _port_change_flag = false;
1987 if (!_port_connection_queue.empty ()) {
1988 connections_changed = true;
1990 while (!_port_connection_queue.empty ()) {
1991 PortConnectData *c = _port_connection_queue.back ();
1992 manager.connect_callback (c->a, c->b, c->c);
1993 _port_connection_queue.pop_back ();
1996 pthread_mutex_unlock (&_port_callback_mutex);
1998 if (ports_changed) {
1999 manager.registration_callback();
2001 if (connections_changed) {
2002 manager.graph_order_callback();
2004 if (connections_changed || ports_changed) {
2005 engine.latency_callback(false);
2006 engine.latency_callback(true);
2013 engine.halted_callback("ALSA I/O error.");
2019 /******************************************************************************/
2021 static boost::shared_ptr<AlsaAudioBackend> _instance;
2023 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
2024 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
2025 static int deinstantiate ();
2026 static bool already_configured ();
2027 static bool available ();
2029 static ARDOUR::AudioBackendInfo _descriptor = {
2038 static boost::shared_ptr<AudioBackend>
2039 backend_factory (AudioEngine& e)
2042 _instance.reset (new AlsaAudioBackend (e, _descriptor));
2048 instantiate (const std::string& arg1, const std::string& /* arg2 */)
2050 s_instance_name = arg1;
2062 already_configured ()
2073 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
2075 return &_descriptor;
2079 /******************************************************************************/
2080 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2085 _capture_latency_range.min = 0;
2086 _capture_latency_range.max = 0;
2087 _playback_latency_range.min = 0;
2088 _playback_latency_range.max = 0;
2091 AlsaPort::~AlsaPort () {
2096 int AlsaPort::connect (AlsaPort *port)
2099 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
2103 if (type () != port->type ()) {
2104 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
2108 if (is_output () && port->is_output ()) {
2109 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
2113 if (is_input () && port->is_input ()) {
2114 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
2119 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
2123 if (is_connected (port)) {
2124 #if 0 // don't bother to warn about this for now. just ignore it
2125 PBD::error << _("AlsaPort::connect (): ports are already connected:")
2126 << " (" << name () << ") -> (" << port->name () << ")"
2132 _connect (port, true);
2137 void AlsaPort::_connect (AlsaPort *port, bool callback)
2139 _connections.push_back (port);
2141 port->_connect (this, false);
2142 _alsa_backend.port_connect_callback (name(), port->name(), true);
2146 int AlsaPort::disconnect (AlsaPort *port)
2149 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
2153 if (!is_connected (port)) {
2154 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
2155 << " (" << name () << ") -> (" << port->name () << ")"
2159 _disconnect (port, true);
2163 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
2165 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
2167 assert (it != _connections.end ());
2169 _connections.erase (it);
2172 port->_disconnect (this, false);
2173 _alsa_backend.port_connect_callback (name(), port->name(), false);
2178 void AlsaPort::disconnect_all ()
2180 while (!_connections.empty ()) {
2181 _connections.back ()->_disconnect (this, false);
2182 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
2183 _connections.pop_back ();
2188 AlsaPort::is_connected (const AlsaPort *port) const
2190 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
2193 bool AlsaPort::is_physically_connected () const
2195 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
2196 if ((*it)->is_physical ()) {
2203 /******************************************************************************/
2205 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2206 : AlsaPort (b, name, flags)
2208 memset (_buffer, 0, sizeof (_buffer));
2209 mlock(_buffer, sizeof (_buffer));
2212 AlsaAudioPort::~AlsaAudioPort () { }
2214 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
2217 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
2218 if (it == get_connections ().end ()) {
2219 memset (_buffer, 0, n_samples * sizeof (Sample));
2221 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
2222 assert (source && source->is_output ());
2223 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
2224 while (++it != get_connections ().end ()) {
2225 source = static_cast<const AlsaAudioPort*>(*it);
2226 assert (source && source->is_output ());
2227 Sample* dst = buffer ();
2228 const Sample* src = source->const_buffer ();
2229 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
2239 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2240 : AlsaPort (b, name, flags)
2244 _buffer[0].clear ();
2245 _buffer[1].clear ();
2248 AlsaMidiPort::~AlsaMidiPort () { }
2250 struct MidiEventSorter {
2251 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
2256 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
2259 (_buffer[_bufperiod]).clear ();
2260 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
2261 i != get_connections ().end ();
2263 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
2264 for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2265 (_buffer[_bufperiod]).push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
2268 std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
2270 return &(_buffer[_bufperiod]);
2273 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2275 , _timestamp (timestamp)
2279 _data = (uint8_t*) malloc (size);
2280 memcpy (_data, data, size);
2284 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
2285 : _size (other.size ())
2286 , _timestamp (other.timestamp ())
2289 if (other.size () && other.const_data ()) {
2290 _data = (uint8_t*) malloc (other.size ());
2291 memcpy (_data, other.const_data (), other.size ());
2295 AlsaMidiEvent::~AlsaMidiEvent () {