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)
74 _instance_name = s_instance_name;
75 pthread_mutex_init (&_port_callback_mutex, 0);
76 _input_audio_device_info.valid = false;
77 _output_audio_device_info.valid = false;
80 AlsaAudioBackend::~AlsaAudioBackend ()
82 pthread_mutex_destroy (&_port_callback_mutex);
85 /* AUDIOBACKEND API */
88 AlsaAudioBackend::name () const
94 AlsaAudioBackend::is_realtime () const
99 std::vector<AudioBackend::DeviceStatus>
100 AlsaAudioBackend::enumerate_devices () const
102 _duplex_audio_device_status.clear();
103 std::map<std::string, std::string> devices;
104 get_alsa_audio_device_names(devices);
105 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
106 if (_input_audio_device == "") _input_audio_device = i->first;
107 if (_output_audio_device == "") _output_audio_device = i->first;
108 _duplex_audio_device_status.push_back (DeviceStatus (i->first, true));
110 return _duplex_audio_device_status;
113 std::vector<AudioBackend::DeviceStatus>
114 AlsaAudioBackend::enumerate_input_devices () const
116 _input_audio_device_status.clear();
117 std::map<std::string, std::string> devices;
118 get_alsa_audio_device_names(devices, HalfDuplexIn);
119 _input_audio_device_status.push_back (DeviceStatus (get_standard_device_name(DeviceNone), true));
120 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
121 if (_input_audio_device == "") _input_audio_device = i->first;
122 _input_audio_device_status.push_back (DeviceStatus (i->first, true));
124 return _input_audio_device_status;
127 std::vector<AudioBackend::DeviceStatus>
128 AlsaAudioBackend::enumerate_output_devices () const
130 _output_audio_device_status.clear();
131 std::map<std::string, std::string> devices;
132 get_alsa_audio_device_names(devices, HalfDuplexOut);
133 _output_audio_device_status.push_back (DeviceStatus (get_standard_device_name(DeviceNone), true));
134 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
135 if (_output_audio_device == "") _output_audio_device = i->first;
136 _output_audio_device_status.push_back (DeviceStatus (i->first, true));
138 return _output_audio_device_status;
142 AlsaAudioBackend::reservation_stdout (std::string d, size_t /* s */)
144 if (d.substr(0, 19) == "Acquired audio-card") {
145 _reservation_succeeded = true;
150 AlsaAudioBackend::release_device()
152 _reservation_connection.drop_connections();
153 ARDOUR::SystemExec * tmp = _device_reservation;
154 _device_reservation = 0;
159 AlsaAudioBackend::acquire_device(const char* device_name)
161 /* This is quick hack, ideally we'll link against libdbus and implement a dbus-listener
162 * that owns the device. here we try to get away by just requesting it and then block it...
163 * (pulseaudio periodically checks anyway)
165 * dbus-send --session --print-reply --type=method_call --dest=org.freedesktop.ReserveDevice1.Audio2 /org/freedesktop/ReserveDevice1/Audio2 org.freedesktop.ReserveDevice1.RequestRelease int32:4
166 * -> should not return 'boolean false'
168 int device_number = card_to_num(device_name);
169 if (device_number < 0) return false;
171 assert(_device_reservation == 0);
172 _reservation_succeeded = false;
174 std::string request_device_exe;
175 if (!PBD::find_file (
176 PBD::Searchpath(Glib::build_filename(ARDOUR::ardour_dll_directory(), "ardouralsautil")
177 + G_SEARCHPATH_SEPARATOR_S + ARDOUR::ardour_dll_directory()),
178 "ardour-request-device", request_device_exe))
180 PBD::warning << "ardour-request-device binary was not found..'" << endmsg;
187 argp=(char**) calloc(5,sizeof(char*));
188 argp[0] = strdup(request_device_exe.c_str());
189 argp[1] = strdup("-P");
190 snprintf(tmp, sizeof(tmp), "%d", getpid());
191 argp[2] = strdup(tmp);
192 snprintf(tmp, sizeof(tmp), "Audio%d", device_number);
193 argp[3] = strdup(tmp);
196 _device_reservation = new ARDOUR::SystemExec(request_device_exe, argp);
197 _device_reservation->ReadStdout.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::reservation_stdout, this, _1 ,_2));
198 _device_reservation->Terminated.connect_same_thread (_reservation_connection, boost::bind (&AlsaAudioBackend::release_device, this));
199 if (_device_reservation->start(0)) {
200 PBD::warning << _("AlsaAudioBackend: Device Request failed.") << endmsg;
205 // wait to check if reservation suceeded.
206 int timeout = 500; // 5 sec
207 while (_device_reservation && !_reservation_succeeded && --timeout > 0) {
210 if (timeout == 0 || !_reservation_succeeded) {
211 PBD::warning << _("AlsaAudioBackend: Device Reservation failed.") << endmsg;
219 AlsaAudioBackend::available_sample_rates2 (const std::string& input_device, const std::string& output_device) const
221 std::vector<float> sr;
222 if (input_device == get_standard_device_name(DeviceNone) && output_device == get_standard_device_name(DeviceNone)) {
225 else if (input_device == get_standard_device_name(DeviceNone)) {
226 sr = available_sample_rates (output_device);
228 else if (output_device == get_standard_device_name(DeviceNone)) {
229 sr = available_sample_rates (input_device);
231 std::vector<float> sr_in = available_sample_rates (input_device);
232 std::vector<float> sr_out = available_sample_rates (output_device);
233 std::set_intersection (sr_in.begin(), sr_in.end(), sr_out.begin(), sr_out.end(), std::back_inserter(sr));
239 AlsaAudioBackend::available_sample_rates (const std::string& device) const
241 ALSADeviceInfo *nfo = NULL;
242 std::vector<float> sr;
243 if (device == get_standard_device_name(DeviceNone)) {
246 if (device == _input_audio_device && _input_audio_device_info.valid) {
247 nfo = &_input_audio_device_info;
249 else if (device == _output_audio_device && _output_audio_device_info.valid) {
250 nfo = &_output_audio_device_info;
253 static const float avail_rates [] = { 8000, 22050.0, 24000.0, 44100.0, 48000.0, 88200.0, 96000.0, 176400.0, 192000.0 };
255 for (size_t i = 0 ; i < sizeof(avail_rates) / sizeof(float); ++i) {
256 if (!nfo || (avail_rates[i] >= nfo->min_rate && avail_rates[i] <= nfo->max_rate)) {
257 sr.push_back (avail_rates[i]);
264 std::vector<uint32_t>
265 AlsaAudioBackend::available_buffer_sizes2 (const std::string& input_device, const std::string& output_device) const
267 std::vector<uint32_t> bs;
268 if (input_device == get_standard_device_name(DeviceNone) && output_device == get_standard_device_name(DeviceNone)) {
271 else if (input_device == get_standard_device_name(DeviceNone)) {
272 bs = available_buffer_sizes (output_device);
274 else if (output_device == get_standard_device_name(DeviceNone)) {
275 bs = available_buffer_sizes (input_device);
277 std::vector<uint32_t> bs_in = available_buffer_sizes (input_device);
278 std::vector<uint32_t> bs_out = available_buffer_sizes (output_device);
279 std::set_intersection (bs_in.begin(), bs_in.end(), bs_out.begin(), bs_out.end(), std::back_inserter(bs));
284 std::vector<uint32_t>
285 AlsaAudioBackend::available_buffer_sizes (const std::string& device) const
287 ALSADeviceInfo *nfo = NULL;
288 std::vector<uint32_t> bs;
289 if (device == get_standard_device_name(DeviceNone)) {
292 if (device == _input_audio_device && _input_audio_device_info.valid) {
293 nfo = &_input_audio_device_info;
295 else if (device == _output_audio_device && _output_audio_device_info.valid) {
296 nfo = &_output_audio_device_info;
299 static const unsigned long avail_sizes [] = { 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192 };
301 for (size_t i = 0 ; i < sizeof(avail_sizes) / sizeof(unsigned long); ++i) {
302 if (!nfo || (avail_sizes[i] >= nfo->min_size && avail_sizes[i] <= nfo->max_size)) {
303 bs.push_back (avail_sizes[i]);
310 AlsaAudioBackend::available_input_channel_count (const std::string& device) const
312 if (device == get_standard_device_name(DeviceNone)) {
315 if (device == _input_audio_device && _input_audio_device_info.valid) {
316 return _input_audio_device_info.max_channels;
322 AlsaAudioBackend::available_output_channel_count (const std::string& device) const
324 if (device == get_standard_device_name(DeviceNone)) {
327 if (device == _output_audio_device && _output_audio_device_info.valid) {
328 return _output_audio_device_info.max_channels;
333 std::vector<uint32_t>
334 AlsaAudioBackend::available_period_sizes (const std::string& driver) const
336 std::vector<uint32_t> ps;
343 AlsaAudioBackend::can_change_sample_rate_when_running () const
349 AlsaAudioBackend::can_change_buffer_size_when_running () const
351 return false; // why not? :)
355 AlsaAudioBackend::set_input_device_name (const std::string& d)
357 if (_input_audio_device == d) {
360 _input_audio_device = d;
362 if (d == get_standard_device_name(DeviceNone)) {
363 _input_audio_device_info.valid = false;
366 std::string alsa_device;
367 std::map<std::string, std::string> devices;
369 get_alsa_audio_device_names(devices, HalfDuplexIn);
370 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
372 alsa_device = i->second;
376 if (alsa_device == "") {
377 _input_audio_device_info.valid = false;
380 /* device will be busy once used, hence cache the parameters */
381 /* return */ get_alsa_device_parameters (alsa_device.c_str(), true, &_input_audio_device_info);
386 AlsaAudioBackend::set_output_device_name (const std::string& d)
388 if (_output_audio_device == d) {
392 _output_audio_device = d;
394 if (d == get_standard_device_name(DeviceNone)) {
395 _output_audio_device_info.valid = false;
398 std::string alsa_device;
399 std::map<std::string, std::string> devices;
401 get_alsa_audio_device_names(devices, HalfDuplexOut);
402 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
404 alsa_device = i->second;
408 if (alsa_device == "") {
409 _output_audio_device_info.valid = false;
412 /* return */ get_alsa_device_parameters (alsa_device.c_str(), true, &_output_audio_device_info);
417 AlsaAudioBackend::set_device_name (const std::string& d)
420 rv |= set_input_device_name (d);
421 rv |= set_output_device_name (d);
426 AlsaAudioBackend::set_sample_rate (float sr)
428 if (sr <= 0) { return -1; }
430 engine.sample_rate_change (sr);
435 AlsaAudioBackend::set_peridod_size (uint32_t n)
437 if (n == 0 || n > 3) {
443 _periods_per_cycle = n;
448 AlsaAudioBackend::set_buffer_size (uint32_t bs)
450 if (bs <= 0 || bs >= _max_buffer_size) {
456 _samples_per_period = bs;
457 engine.buffer_size_change (bs);
462 AlsaAudioBackend::set_interleaved (bool yn)
464 if (!yn) { return 0; }
469 AlsaAudioBackend::set_input_channels (uint32_t cc)
476 AlsaAudioBackend::set_output_channels (uint32_t cc)
483 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
485 _systemic_audio_input_latency = sl;
487 update_systemic_audio_latencies();
493 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
495 _systemic_audio_output_latency = sl;
497 update_systemic_audio_latencies();
503 AlsaAudioBackend::set_systemic_midi_input_latency (std::string const device, uint32_t sl)
505 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
507 nfo->systemic_input_latency = sl;
508 if (_run && nfo->enabled) {
509 update_systemic_midi_latencies ();
515 AlsaAudioBackend::set_systemic_midi_output_latency (std::string const device, uint32_t sl)
517 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
519 nfo->systemic_output_latency = sl;
520 if (_run && nfo->enabled) {
521 update_systemic_midi_latencies ();
527 AlsaAudioBackend::update_systemic_audio_latencies ()
529 const uint32_t lcpp = (_periods_per_cycle - 2) * _samples_per_period;
532 lr.min = lr.max = lcpp + (_measure_latency ? 0 : _systemic_audio_input_latency);
533 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
534 set_latency_range (*it, true, lr);
537 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_output_latency);
538 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
539 set_latency_range (*it, false, lr);
545 AlsaAudioBackend::update_systemic_midi_latencies ()
548 // TODO, need a way to associate the port with the corresponding AlsaMidiDeviceInfo
549 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
551 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
552 set_latency_range (*it, false, lr);
554 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
556 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
557 set_latency_range (*it, true, lr);
563 /* Retrieving parameters */
565 AlsaAudioBackend::device_name () const
567 if (_input_audio_device != get_standard_device_name(DeviceNone)) {
568 return _input_audio_device;
570 if (_output_audio_device != get_standard_device_name(DeviceNone)) {
571 return _output_audio_device;
577 AlsaAudioBackend::input_device_name () const
579 return _input_audio_device;
583 AlsaAudioBackend::output_device_name () const
585 return _output_audio_device;
589 AlsaAudioBackend::sample_rate () const
595 AlsaAudioBackend::buffer_size () const
597 return _samples_per_period;
601 AlsaAudioBackend::period_size () const
603 return _periods_per_cycle;
607 AlsaAudioBackend::interleaved () const
613 AlsaAudioBackend::input_channels () const
619 AlsaAudioBackend::output_channels () const
625 AlsaAudioBackend::systemic_input_latency () const
627 return _systemic_audio_input_latency;
631 AlsaAudioBackend::systemic_output_latency () const
633 return _systemic_audio_output_latency;
637 AlsaAudioBackend::systemic_midi_input_latency (std::string const device) const
639 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
641 return nfo->systemic_input_latency;
645 AlsaAudioBackend::systemic_midi_output_latency (std::string const device) const
647 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
649 return nfo->systemic_output_latency;
653 struct AlsaAudioBackend::AlsaMidiDeviceInfo *
654 AlsaAudioBackend::midi_device_info(std::string const name) const {
655 for (std::map<std::string, struct AlsaMidiDeviceInfo*>::const_iterator i = _midi_devices.begin (); i != _midi_devices.end(); ++i) {
656 if (i->first == name) {
661 assert(_midi_driver_option != get_standard_device_name(DeviceNone));
663 std::map<std::string, std::string> devices;
664 if (_midi_driver_option == _("ALSA raw devices")) {
665 get_alsa_rawmidi_device_names(devices);
667 get_alsa_sequencer_names (devices);
670 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
671 if (i->first == name) {
672 _midi_devices[name] = new AlsaMidiDeviceInfo();
673 return _midi_devices[name];
679 std::vector<std::string>
680 AlsaAudioBackend::enumerate_midi_options () const
682 if (_midi_options.empty()) {
683 _midi_options.push_back (_("ALSA raw devices"));
684 _midi_options.push_back (_("ALSA sequencer"));
685 _midi_options.push_back (get_standard_device_name(DeviceNone));
687 return _midi_options;
690 std::vector<AudioBackend::DeviceStatus>
691 AlsaAudioBackend::enumerate_midi_devices () const
693 _midi_device_status.clear();
694 std::map<std::string, std::string> devices;
696 if (_midi_driver_option == _("ALSA raw devices")) {
697 get_alsa_rawmidi_device_names (devices);
699 else if (_midi_driver_option == _("ALSA sequencer")) {
700 get_alsa_sequencer_names (devices);
703 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
704 _midi_device_status.push_back (DeviceStatus (i->first, true));
706 return _midi_device_status;
710 AlsaAudioBackend::set_midi_option (const std::string& opt)
712 if (opt != get_standard_device_name(DeviceNone) && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
715 _midi_driver_option = opt;
720 AlsaAudioBackend::midi_option () const
722 return _midi_driver_option;
726 AlsaAudioBackend::set_midi_device_enabled (std::string const device, bool enable)
728 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
730 nfo->enabled = enable;
731 // TODO - trigger update when already running
736 AlsaAudioBackend::midi_device_enabled (std::string const device) const
738 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
739 if (!nfo) return false;
745 static void * pthread_process (void *arg)
747 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
748 d->main_process_thread ();
754 AlsaAudioBackend::_start (bool for_latency_measurement)
756 if (!_active && _run) {
757 // recover from 'halted', reap threads
761 if (_active || _run) {
762 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
763 return BackendReinitializationError;
767 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
768 _system_inputs.clear();
769 _system_outputs.clear();
770 _system_midi_in.clear();
771 _system_midi_out.clear();
775 /* reset internal state */
777 _freewheeling = false;
779 _last_process_start = 0;
783 assert(_rmidi_in.size() == 0);
784 assert(_rmidi_out.size() == 0);
788 std::string audio_device;
789 std::string alsa_device;
790 std::map<std::string, std::string> devices;
792 if (_input_audio_device == get_standard_device_name(DeviceNone) && _output_audio_device == get_standard_device_name(DeviceNone)) {
793 PBD::error << _("AlsaAudioBackend: At least one of input or output device needs to be set.");
794 return AudioDeviceInvalidError;
797 if (_input_audio_device != _output_audio_device) {
798 if (_input_audio_device != get_standard_device_name(DeviceNone) && _output_audio_device != get_standard_device_name(DeviceNone)) {
799 PBD::error << _("AlsaAudioBackend: Cannot use two different devices.");
800 return AudioDeviceInvalidError;
802 if (_input_audio_device != get_standard_device_name(DeviceNone)) {
803 get_alsa_audio_device_names(devices, HalfDuplexIn);
804 audio_device = _input_audio_device;
807 get_alsa_audio_device_names(devices, HalfDuplexOut);
808 audio_device = _output_audio_device;
812 get_alsa_audio_device_names(devices);
813 audio_device = _input_audio_device;
817 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
818 if (i->first == audio_device) {
819 alsa_device = i->second;
823 if (alsa_device == "") {
824 PBD::error << _("AlsaAudioBackend: Cannot find configured device. Is it still connected?");
825 return AudioDeviceNotAvailableError;
828 acquire_device(alsa_device.c_str());
829 _pcmi = new Alsa_pcmi (
830 (duplex & 2) ? alsa_device.c_str() : NULL,
831 (duplex & 1) ? alsa_device.c_str() : NULL,
832 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
834 AudioBackend::ErrorCode error_code = NoError;
835 switch (_pcmi->state()) {
839 PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg;
840 error_code = AudioDeviceOpenError;
843 PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg;
844 error_code = AudioDeviceOpenError;
847 PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.")
849 error_code = SampleRateNotSupportedError;
852 PBD::error << _("AlsaAudioBackend: cannot set requested period size.")
854 error_code = PeriodSizeNotSupportedError;
857 PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.")
859 error_code = PeriodCountNotSupportedError;
862 PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg;
863 error_code = SampleFormatNotSupportedError;
866 PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg;
867 error_code = AudioDeviceOpenError;
871 if (_pcmi->state ()) {
872 delete _pcmi; _pcmi = 0;
881 if (_n_outputs != _pcmi->nplay ()) {
882 if (_n_outputs == 0) {
883 _n_outputs = _pcmi->nplay ();
885 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
887 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
890 if (_n_inputs != _pcmi->ncapt ()) {
891 if (_n_inputs == 0) {
892 _n_inputs = _pcmi->ncapt ();
894 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
896 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
899 if (_pcmi->fsize() != _samples_per_period) {
900 _samples_per_period = _pcmi->fsize();
901 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
904 if (_pcmi->fsamp() != _samplerate) {
905 _samplerate = _pcmi->fsamp();
906 engine.sample_rate_change (_samplerate);
907 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
910 _measure_latency = for_latency_measurement;
912 register_system_midi_ports();
914 if (register_system_audio_ports()) {
915 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
916 delete _pcmi; _pcmi = 0;
918 return PortRegistrationError;
921 engine.sample_rate_change (_samplerate);
922 engine.buffer_size_change (_samples_per_period);
924 if (engine.reestablish_ports ()) {
925 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
926 delete _pcmi; _pcmi = 0;
928 return PortReconnectError;
931 engine.reconnect_ports ();
933 _port_change_flag = false;
935 if (_realtime_pthread_create (SCHED_FIFO, -20, 100000,
936 &_main_thread, pthread_process, this))
938 if (pthread_create (&_main_thread, NULL, pthread_process, this))
940 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
941 delete _pcmi; _pcmi = 0;
944 return ProcessThreadStartError;
946 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
951 while (!_active && --timeout > 0) { Glib::usleep (1000); }
953 if (timeout == 0 || !_active) {
954 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
955 delete _pcmi; _pcmi = 0;
958 return ProcessThreadStartError;
965 AlsaAudioBackend::stop ()
973 if (pthread_join (_main_thread, &status)) {
974 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
978 while (!_rmidi_out.empty ()) {
979 AlsaMidiIO *m = _rmidi_out.back ();
981 _rmidi_out.pop_back ();
984 while (!_rmidi_in.empty ()) {
985 AlsaMidiIO *m = _rmidi_in.back ();
987 _rmidi_in.pop_back ();
992 delete _pcmi; _pcmi = 0;
995 return (_active == false) ? 0 : -1;
999 AlsaAudioBackend::freewheel (bool onoff)
1001 _freewheeling = onoff;
1006 AlsaAudioBackend::dsp_load () const
1008 return 100.f * _dsp_load;
1012 AlsaAudioBackend::raw_buffer_size (DataType t)
1015 case DataType::AUDIO:
1016 return _samples_per_period * sizeof(Sample);
1017 case DataType::MIDI:
1018 return _max_buffer_size; // XXX not really limited
1025 AlsaAudioBackend::sample_time ()
1027 return _processed_samples;
1031 AlsaAudioBackend::sample_time_at_cycle_start ()
1033 return _processed_samples;
1037 AlsaAudioBackend::samples_since_cycle_start ()
1039 if (!_active || !_run || _freewheeling || _freewheel) {
1042 if (_last_process_start == 0) {
1046 const int64_t elapsed_time_us = g_get_monotonic_time() - _last_process_start;
1047 return std::max((pframes_t)0, (pframes_t)rint(1e-6 * elapsed_time_us * _samplerate));
1052 AlsaAudioBackend::alsa_process_thread (void *arg)
1054 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
1055 boost::function<void ()> f = td->f;
1062 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
1064 pthread_t thread_id;
1065 pthread_attr_t attr;
1066 size_t stacksize = 100000;
1068 ThreadData* td = new ThreadData (this, func, stacksize);
1070 if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
1071 &thread_id, alsa_process_thread, td)) {
1072 pthread_attr_init (&attr);
1073 pthread_attr_setstacksize (&attr, stacksize);
1074 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
1075 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
1076 pthread_attr_destroy (&attr);
1079 pthread_attr_destroy (&attr);
1082 _threads.push_back (thread_id);
1087 AlsaAudioBackend::join_process_threads ()
1091 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
1094 if (pthread_join (*i, &status)) {
1095 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
1104 AlsaAudioBackend::in_process_thread ()
1106 if (pthread_equal (_main_thread, pthread_self()) != 0) {
1110 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
1112 if (pthread_equal (*i, pthread_self ()) != 0) {
1120 AlsaAudioBackend::process_thread_count ()
1122 return _threads.size ();
1126 AlsaAudioBackend::update_latencies ()
1128 // trigger latency callback in RT thread (locked graph)
1129 port_connect_add_remove_callback();
1132 /* PORTENGINE API */
1135 AlsaAudioBackend::private_handle () const
1141 AlsaAudioBackend::my_name () const
1143 return _instance_name;
1147 AlsaAudioBackend::available () const
1149 return _run && _active;
1153 AlsaAudioBackend::port_name_size () const
1159 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
1161 if (!valid_port (port)) {
1162 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
1165 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
1169 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
1171 if (!valid_port (port)) {
1172 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
1173 return std::string ();
1175 return static_cast<AlsaPort*>(port)->name ();
1178 PortEngine::PortHandle
1179 AlsaAudioBackend::get_port_by_name (const std::string& name) const
1181 PortHandle port = (PortHandle) find_port (name);
1186 AlsaAudioBackend::get_ports (
1187 const std::string& port_name_pattern,
1188 DataType type, PortFlags flags,
1189 std::vector<std::string>& port_names) const
1193 bool use_regexp = false;
1194 if (port_name_pattern.size () > 0) {
1195 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
1199 for (size_t i = 0; i < _ports.size (); ++i) {
1200 AlsaPort* port = _ports[i];
1201 if ((port->type () == type) && flags == (port->flags () & flags)) {
1202 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
1203 port_names.push_back (port->name ());
1209 regfree (&port_regex);
1215 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
1217 if (!valid_port (port)) {
1218 return DataType::NIL;
1220 return static_cast<AlsaPort*>(port)->type ();
1223 PortEngine::PortHandle
1224 AlsaAudioBackend::register_port (
1225 const std::string& name,
1226 ARDOUR::DataType type,
1227 ARDOUR::PortFlags flags)
1229 if (name.size () == 0) { return 0; }
1230 if (flags & IsPhysical) { return 0; }
1231 return add_port (_instance_name + ":" + name, type, flags);
1234 PortEngine::PortHandle
1235 AlsaAudioBackend::add_port (
1236 const std::string& name,
1237 ARDOUR::DataType type,
1238 ARDOUR::PortFlags flags)
1240 assert(name.size ());
1241 if (find_port (name)) {
1242 PBD::error << _("AlsaBackend::register_port: Port already exists:")
1243 << " (" << name << ")" << endmsg;
1246 AlsaPort* port = NULL;
1248 case DataType::AUDIO:
1249 port = new AlsaAudioPort (*this, name, flags);
1251 case DataType::MIDI:
1252 port = new AlsaMidiPort (*this, name, flags);
1255 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
1259 _ports.push_back (port);
1265 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
1270 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
1271 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
1272 if (i == _ports.end ()) {
1273 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
1276 disconnect_all(port_handle);
1282 AlsaAudioBackend::register_system_audio_ports()
1286 const int a_ins = _n_inputs;
1287 const int a_out = _n_outputs;
1289 const uint32_t lcpp = (_periods_per_cycle - 2) * _samples_per_period;
1292 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_input_latency);
1293 for (int i = 1; i <= a_ins; ++i) {
1295 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
1296 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1298 set_latency_range (p, false, lr);
1299 _system_inputs.push_back(static_cast<AlsaPort*>(p));
1302 lr.min = lr.max = lcpp + (_measure_latency ? 0 : _systemic_audio_output_latency);
1303 for (int i = 1; i <= a_out; ++i) {
1305 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
1306 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1308 set_latency_range (p, true, lr);
1309 _system_outputs.push_back(static_cast<AlsaPort*>(p));
1315 AlsaAudioBackend::register_system_midi_ports()
1317 std::map<std::string, std::string> devices;
1321 if (_midi_driver_option == get_standard_device_name(DeviceNone)) {
1323 } else if (_midi_driver_option == _("ALSA raw devices")) {
1324 get_alsa_rawmidi_device_names(devices);
1326 get_alsa_sequencer_names (devices);
1329 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
1330 struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first);
1332 if (!nfo->enabled) continue;
1335 if (_midi_driver_option == _("ALSA raw devices")) {
1336 mout = new AlsaRawMidiOut (i->second.c_str());
1338 mout = new AlsaSeqMidiOut (i->second.c_str());
1341 if (mout->state ()) {
1342 PBD::warning << string_compose (
1343 _("AlsaMidiOut: failed to open midi device '%1'."), i->second)
1347 mout->setup_timing(_samples_per_period, _samplerate);
1348 mout->sync_time (g_get_monotonic_time());
1349 if (mout->start ()) {
1350 PBD::warning << string_compose (
1351 _("AlsaMidiOut: failed to start midi device '%1'."), i->second)
1356 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", ++midi_ins);
1357 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1363 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
1364 set_latency_range (p, true, lr);
1365 static_cast<AlsaMidiPort*>(p)->set_n_periods(_periods_per_cycle); // TODO check MIDI alignment
1366 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
1367 _rmidi_out.push_back (mout);
1372 if (_midi_driver_option == _("ALSA raw devices")) {
1373 midin = new AlsaRawMidiIn (i->second.c_str());
1375 midin = new AlsaSeqMidiIn (i->second.c_str());
1378 if (midin->state ()) {
1379 PBD::warning << string_compose (
1380 _("AlsaMidiIn: failed to open midi device '%1'."), i->second)
1384 midin->setup_timing(_samples_per_period, _samplerate);
1385 midin->sync_time (g_get_monotonic_time());
1386 if (midin->start ()) {
1387 PBD::warning << string_compose (
1388 _("AlsaMidiIn: failed to start midi device '%1'."), i->second)
1393 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", ++midi_outs);
1394 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1401 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
1402 set_latency_range (p, false, lr);
1403 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
1404 _rmidi_in.push_back (midin);
1412 AlsaAudioBackend::unregister_ports (bool system_only)
1415 _system_inputs.clear();
1416 _system_outputs.clear();
1417 _system_midi_in.clear();
1418 _system_midi_out.clear();
1419 while (i < _ports.size ()) {
1420 AlsaPort* port = _ports[i];
1421 if (! system_only || (port->is_physical () && port->is_terminal ())) {
1422 port->disconnect_all ();
1424 _ports.erase (_ports.begin() + i);
1432 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
1434 AlsaPort* src_port = find_port (src);
1435 AlsaPort* dst_port = find_port (dst);
1438 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
1439 << " (" << src <<")" << endmsg;
1443 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
1444 << " (" << dst <<")" << endmsg;
1447 return src_port->connect (dst_port);
1451 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
1453 AlsaPort* src_port = find_port (src);
1454 AlsaPort* dst_port = find_port (dst);
1456 if (!src_port || !dst_port) {
1457 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1460 return src_port->disconnect (dst_port);
1464 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1466 AlsaPort* dst_port = find_port (dst);
1467 if (!valid_port (src)) {
1468 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1472 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1473 << " (" << dst << ")" << endmsg;
1476 return static_cast<AlsaPort*>(src)->connect (dst_port);
1480 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1482 AlsaPort* dst_port = find_port (dst);
1483 if (!valid_port (src) || !dst_port) {
1484 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1487 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1491 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1493 if (!valid_port (port)) {
1494 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1497 static_cast<AlsaPort*>(port)->disconnect_all ();
1502 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1504 if (!valid_port (port)) {
1505 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1508 return static_cast<AlsaPort*>(port)->is_connected ();
1512 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1514 AlsaPort* dst_port = find_port (dst);
1515 if (!valid_port (src) || !dst_port) {
1516 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1519 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1523 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1525 if (!valid_port (port)) {
1526 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1529 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1533 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1535 if (!valid_port (port)) {
1536 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1540 assert (0 == names.size ());
1542 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1544 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1545 names.push_back ((*i)->name ());
1548 return (int)names.size ();
1553 AlsaAudioBackend::midi_event_get (
1554 pframes_t& timestamp,
1555 size_t& size, uint8_t** buf, void* port_buffer,
1556 uint32_t event_index)
1558 assert (buf && port_buffer);
1559 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1560 if (event_index >= source.size ()) {
1563 AlsaMidiEvent * const event = source[event_index].get ();
1565 timestamp = event->timestamp ();
1566 size = event->size ();
1567 *buf = event->data ();
1572 AlsaAudioBackend::midi_event_put (
1574 pframes_t timestamp,
1575 const uint8_t* buffer, size_t size)
1577 assert (buffer && port_buffer);
1578 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1579 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1581 // nevermind, ::get_buffer() sorts events
1582 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1583 (pframes_t)dst.back ()->timestamp (), timestamp);
1586 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1591 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1593 assert (port_buffer);
1594 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1598 AlsaAudioBackend::midi_clear (void* port_buffer)
1600 assert (port_buffer);
1601 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1609 AlsaAudioBackend::can_monitor_input () const
1615 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1621 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1627 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1632 /* Latency management */
1635 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1637 if (!valid_port (port)) {
1638 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1640 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1644 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1647 if (!valid_port (port)) {
1648 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1653 AlsaPort *p = static_cast<AlsaPort*>(port);
1656 r = p->latency_range (for_playback);
1657 if (p->is_physical() && p->is_terminal()) {
1658 if (p->is_input() && for_playback) {
1659 r.min += _samples_per_period;
1660 r.max += _samples_per_period;
1662 if (p->is_output() && !for_playback) {
1663 r.min += _samples_per_period;
1664 r.max += _samples_per_period;
1670 /* Discovering physical ports */
1673 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1675 if (!valid_port (port)) {
1676 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1679 return static_cast<AlsaPort*>(port)->is_physical ();
1683 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1685 for (size_t i = 0; i < _ports.size (); ++i) {
1686 AlsaPort* port = _ports[i];
1687 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1688 port_names.push_back (port->name ());
1694 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1696 for (size_t i = 0; i < _ports.size (); ++i) {
1697 AlsaPort* port = _ports[i];
1698 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1699 port_names.push_back (port->name ());
1705 AlsaAudioBackend::n_physical_outputs () const
1709 for (size_t i = 0; i < _ports.size (); ++i) {
1710 AlsaPort* port = _ports[i];
1711 if (port->is_output () && port->is_physical ()) {
1712 switch (port->type ()) {
1713 case DataType::AUDIO: ++n_audio; break;
1714 case DataType::MIDI: ++n_midi; break;
1720 cc.set (DataType::AUDIO, n_audio);
1721 cc.set (DataType::MIDI, n_midi);
1726 AlsaAudioBackend::n_physical_inputs () const
1730 for (size_t i = 0; i < _ports.size (); ++i) {
1731 AlsaPort* port = _ports[i];
1732 if (port->is_input () && port->is_physical ()) {
1733 switch (port->type ()) {
1734 case DataType::AUDIO: ++n_audio; break;
1735 case DataType::MIDI: ++n_midi; break;
1741 cc.set (DataType::AUDIO, n_audio);
1742 cc.set (DataType::MIDI, n_midi);
1746 /* Getting access to the data buffer for a port */
1749 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1752 assert (valid_port (port));
1753 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1756 /* Engine Process */
1758 AlsaAudioBackend::main_process_thread ()
1760 AudioEngine::thread_init_callback (this);
1762 _processed_samples = 0;
1765 _pcmi->pcm_start ();
1766 int no_proc_errors = 0;
1767 const int bailout = 2 * _samplerate / _samples_per_period;
1769 manager.registration_callback();
1770 manager.graph_order_callback();
1776 if (_freewheeling != _freewheel) {
1777 _freewheel = _freewheeling;
1778 engine.freewheel_callback (_freewheel);
1782 nr = _pcmi->pcm_wait ();
1784 if (_pcmi->state () > 0) {
1788 if (_pcmi->state () < 0) {
1789 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1792 if (no_proc_errors > bailout) {
1795 _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."),
1801 while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) {
1803 clock1 = g_get_monotonic_time();
1806 _pcmi->capt_init (_samples_per_period);
1807 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1808 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1810 _pcmi->capt_done (_samples_per_period);
1812 /* de-queue incoming midi*/
1814 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1815 assert (_rmidi_in.size() > i);
1816 AlsaMidiIn *rm = _rmidi_in.at(i);
1817 void *bptr = (*it)->get_buffer(0);
1819 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1820 size_t size = sizeof(data);
1822 while (rm->recv_event (time, data, size)) {
1823 midi_event_put(bptr, time, data, size);
1824 size = sizeof(data);
1826 rm->sync_time (clock1);
1829 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1830 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1833 /* call engine process callback */
1834 _last_process_start = g_get_monotonic_time();
1835 if (engine.process_callback (_samples_per_period)) {
1841 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1842 static_cast<AlsaMidiPort*>(*it)->next_period();
1845 /* queue outgoing midi */
1847 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1848 assert (_rmidi_out.size() > i);
1849 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
1850 AlsaMidiOut *rm = _rmidi_out.at(i);
1851 rm->sync_time (clock1);
1852 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1853 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1857 /* write back audio */
1859 _pcmi->play_init (_samples_per_period);
1860 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1861 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1863 for (; i < _pcmi->nplay (); ++i) {
1864 _pcmi->clear_chan (i, _samples_per_period);
1866 _pcmi->play_done (_samples_per_period);
1867 nr -= _samples_per_period;
1868 _processed_samples += _samples_per_period;
1870 _dsp_load_calc.set_max_time(_samplerate, _samples_per_period);
1871 _dsp_load_calc.set_start_timestamp_us (clock1);
1872 _dsp_load_calc.set_stop_timestamp_us (g_get_monotonic_time());
1873 _dsp_load = _dsp_load_calc.get_dsp_load ();
1876 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1879 fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n",
1880 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1886 // zero audio input buffers
1887 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1888 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1891 clock1 = g_get_monotonic_time();
1893 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1894 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1895 AlsaMidiIn *rm = _rmidi_in.at(i);
1896 void *bptr = (*it)->get_buffer(0);
1897 midi_clear(bptr); // zero midi buffer
1899 // TODO add an API call for this.
1901 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1902 size_t size = sizeof(data);
1903 while (rm->recv_event (time, data, size)) {
1904 ; // discard midi-data from HW.
1906 rm->sync_time (clock1);
1909 _last_process_start = 0;
1910 if (engine.process_callback (_samples_per_period)) {
1916 // drop all outgoing MIDI messages
1917 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1918 void *bptr = (*it)->get_buffer(0);
1923 Glib::usleep (100); // don't hog cpu
1926 bool connections_changed = false;
1927 bool ports_changed = false;
1928 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1929 if (_port_change_flag) {
1930 ports_changed = true;
1931 _port_change_flag = false;
1933 if (!_port_connection_queue.empty ()) {
1934 connections_changed = true;
1936 while (!_port_connection_queue.empty ()) {
1937 PortConnectData *c = _port_connection_queue.back ();
1938 manager.connect_callback (c->a, c->b, c->c);
1939 _port_connection_queue.pop_back ();
1942 pthread_mutex_unlock (&_port_callback_mutex);
1944 if (ports_changed) {
1945 manager.registration_callback();
1947 if (connections_changed) {
1948 manager.graph_order_callback();
1950 if (connections_changed || ports_changed) {
1951 engine.latency_callback(false);
1952 engine.latency_callback(true);
1959 engine.halted_callback("ALSA I/O error.");
1965 /******************************************************************************/
1967 static boost::shared_ptr<AlsaAudioBackend> _instance;
1969 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1970 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1971 static int deinstantiate ();
1972 static bool already_configured ();
1973 static bool available ();
1975 static ARDOUR::AudioBackendInfo _descriptor = {
1984 static boost::shared_ptr<AudioBackend>
1985 backend_factory (AudioEngine& e)
1988 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1994 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1996 s_instance_name = arg1;
2008 already_configured ()
2019 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
2021 return &_descriptor;
2025 /******************************************************************************/
2026 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2031 _capture_latency_range.min = 0;
2032 _capture_latency_range.max = 0;
2033 _playback_latency_range.min = 0;
2034 _playback_latency_range.max = 0;
2037 AlsaPort::~AlsaPort () {
2042 int AlsaPort::connect (AlsaPort *port)
2045 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
2049 if (type () != port->type ()) {
2050 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
2054 if (is_output () && port->is_output ()) {
2055 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
2059 if (is_input () && port->is_input ()) {
2060 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
2065 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
2069 if (is_connected (port)) {
2070 #if 0 // don't bother to warn about this for now. just ignore it
2071 PBD::error << _("AlsaPort::connect (): ports are already connected:")
2072 << " (" << name () << ") -> (" << port->name () << ")"
2078 _connect (port, true);
2083 void AlsaPort::_connect (AlsaPort *port, bool callback)
2085 _connections.push_back (port);
2087 port->_connect (this, false);
2088 _alsa_backend.port_connect_callback (name(), port->name(), true);
2092 int AlsaPort::disconnect (AlsaPort *port)
2095 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
2099 if (!is_connected (port)) {
2100 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
2101 << " (" << name () << ") -> (" << port->name () << ")"
2105 _disconnect (port, true);
2109 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
2111 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
2113 assert (it != _connections.end ());
2115 _connections.erase (it);
2118 port->_disconnect (this, false);
2119 _alsa_backend.port_connect_callback (name(), port->name(), false);
2124 void AlsaPort::disconnect_all ()
2126 while (!_connections.empty ()) {
2127 _connections.back ()->_disconnect (this, false);
2128 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
2129 _connections.pop_back ();
2134 AlsaPort::is_connected (const AlsaPort *port) const
2136 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
2139 bool AlsaPort::is_physically_connected () const
2141 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
2142 if ((*it)->is_physical ()) {
2149 /******************************************************************************/
2151 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2152 : AlsaPort (b, name, flags)
2154 memset (_buffer, 0, sizeof (_buffer));
2155 mlock(_buffer, sizeof (_buffer));
2158 AlsaAudioPort::~AlsaAudioPort () { }
2160 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
2163 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
2164 if (it == get_connections ().end ()) {
2165 memset (_buffer, 0, n_samples * sizeof (Sample));
2167 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
2168 assert (source && source->is_output ());
2169 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
2170 while (++it != get_connections ().end ()) {
2171 source = static_cast<const AlsaAudioPort*>(*it);
2172 assert (source && source->is_output ());
2173 Sample* dst = buffer ();
2174 const Sample* src = source->const_buffer ();
2175 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
2185 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2186 : AlsaPort (b, name, flags)
2190 _buffer[0].clear ();
2191 _buffer[1].clear ();
2194 AlsaMidiPort::~AlsaMidiPort () { }
2196 struct MidiEventSorter {
2197 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
2202 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
2205 (_buffer[_bufperiod]).clear ();
2206 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
2207 i != get_connections ().end ();
2209 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
2210 for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2211 (_buffer[_bufperiod]).push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
2214 std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
2216 return &(_buffer[_bufperiod]);
2219 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2221 , _timestamp (timestamp)
2225 _data = (uint8_t*) malloc (size);
2226 memcpy (_data, data, size);
2230 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
2231 : _size (other.size ())
2232 , _timestamp (other.timestamp ())
2235 if (other.size () && other.const_data ()) {
2236 _data = (uint8_t*) malloc (other.size ());
2237 memcpy (_data, other.const_data (), other.size ());
2241 AlsaMidiEvent::~AlsaMidiEvent () {