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;
490 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
492 _systemic_audio_output_latency = sl;
497 AlsaAudioBackend::set_systemic_midi_input_latency (std::string const device, uint32_t sl)
499 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
501 nfo->systemic_input_latency = sl;
506 AlsaAudioBackend::set_systemic_midi_output_latency (std::string const device, uint32_t sl)
508 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
510 nfo->systemic_output_latency = sl;
514 /* Retrieving parameters */
516 AlsaAudioBackend::device_name () const
518 if (_input_audio_device != get_standard_device_name(DeviceNone)) {
519 return _input_audio_device;
521 if (_output_audio_device != get_standard_device_name(DeviceNone)) {
522 return _output_audio_device;
528 AlsaAudioBackend::input_device_name () const
530 return _input_audio_device;
534 AlsaAudioBackend::output_device_name () const
536 return _output_audio_device;
540 AlsaAudioBackend::sample_rate () const
546 AlsaAudioBackend::buffer_size () const
548 return _samples_per_period;
552 AlsaAudioBackend::period_size () const
554 return _periods_per_cycle;
558 AlsaAudioBackend::interleaved () const
564 AlsaAudioBackend::input_channels () const
570 AlsaAudioBackend::output_channels () const
576 AlsaAudioBackend::systemic_input_latency () const
578 return _systemic_audio_input_latency;
582 AlsaAudioBackend::systemic_output_latency () const
584 return _systemic_audio_output_latency;
588 AlsaAudioBackend::systemic_midi_input_latency (std::string const device) const
590 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
592 return nfo->systemic_input_latency;
596 AlsaAudioBackend::systemic_midi_output_latency (std::string const device) const
598 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
600 return nfo->systemic_output_latency;
604 struct AlsaAudioBackend::AlsaMidiDeviceInfo *
605 AlsaAudioBackend::midi_device_info(std::string const name) const {
606 for (std::map<std::string, struct AlsaMidiDeviceInfo*>::const_iterator i = _midi_devices.begin (); i != _midi_devices.end(); ++i) {
607 if (i->first == name) {
612 assert(_midi_driver_option != get_standard_device_name(DeviceNone));
614 std::map<std::string, std::string> devices;
615 if (_midi_driver_option == _("ALSA raw devices")) {
616 get_alsa_rawmidi_device_names(devices);
618 get_alsa_sequencer_names (devices);
621 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
622 if (i->first == name) {
623 _midi_devices[name] = new AlsaMidiDeviceInfo();
624 return _midi_devices[name];
630 std::vector<std::string>
631 AlsaAudioBackend::enumerate_midi_options () const
633 if (_midi_options.empty()) {
634 _midi_options.push_back (_("ALSA raw devices"));
635 _midi_options.push_back (_("ALSA sequencer"));
636 _midi_options.push_back (get_standard_device_name(DeviceNone));
638 return _midi_options;
641 std::vector<AudioBackend::DeviceStatus>
642 AlsaAudioBackend::enumerate_midi_devices () const
644 _midi_device_status.clear();
645 std::map<std::string, std::string> devices;
647 if (_midi_driver_option == _("ALSA raw devices")) {
648 get_alsa_rawmidi_device_names (devices);
650 else if (_midi_driver_option == _("ALSA sequencer")) {
651 get_alsa_sequencer_names (devices);
654 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
655 _midi_device_status.push_back (DeviceStatus (i->first, true));
657 return _midi_device_status;
661 AlsaAudioBackend::set_midi_option (const std::string& opt)
663 if (opt != get_standard_device_name(DeviceNone) && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
666 _midi_driver_option = opt;
671 AlsaAudioBackend::midi_option () const
673 return _midi_driver_option;
677 AlsaAudioBackend::set_midi_device_enabled (std::string const device, bool enable)
679 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
681 nfo->enabled = enable;
686 AlsaAudioBackend::midi_device_enabled (std::string const device) const
688 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
689 if (!nfo) return false;
695 static void * pthread_process (void *arg)
697 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
698 d->main_process_thread ();
704 AlsaAudioBackend::_start (bool for_latency_measurement)
706 if (!_active && _run) {
707 // recover from 'halted', reap threads
711 if (_active || _run) {
712 PBD::error << _("AlsaAudioBackend: already active.") << endmsg;
713 return BackendReinitializationError;
717 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
718 _system_inputs.clear();
719 _system_outputs.clear();
720 _system_midi_in.clear();
721 _system_midi_out.clear();
725 /* reset internal state */
727 _freewheeling = false;
729 _last_process_start = 0;
733 assert(_rmidi_in.size() == 0);
734 assert(_rmidi_out.size() == 0);
738 std::string audio_device;
739 std::string alsa_device;
740 std::map<std::string, std::string> devices;
742 if (_input_audio_device == get_standard_device_name(DeviceNone) && _output_audio_device == get_standard_device_name(DeviceNone)) {
743 PBD::error << _("AlsaAudioBackend: At least one of input or output device needs to be set.");
744 return AudioDeviceInvalidError;
747 if (_input_audio_device != _output_audio_device) {
748 if (_input_audio_device != get_standard_device_name(DeviceNone) && _output_audio_device != get_standard_device_name(DeviceNone)) {
749 PBD::error << _("AlsaAudioBackend: Cannot use two different devices.");
750 return AudioDeviceInvalidError;
752 if (_input_audio_device != get_standard_device_name(DeviceNone)) {
753 get_alsa_audio_device_names(devices, HalfDuplexIn);
754 audio_device = _input_audio_device;
757 get_alsa_audio_device_names(devices, HalfDuplexOut);
758 audio_device = _output_audio_device;
762 get_alsa_audio_device_names(devices);
763 audio_device = _input_audio_device;
767 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
768 if (i->first == audio_device) {
769 alsa_device = i->second;
773 if (alsa_device == "") {
774 PBD::error << _("AlsaAudioBackend: Cannot find configured device. Is it still connected?");
775 return AudioDeviceNotAvailableError;
778 acquire_device(alsa_device.c_str());
779 _pcmi = new Alsa_pcmi (
780 (duplex & 2) ? alsa_device.c_str() : NULL,
781 (duplex & 1) ? alsa_device.c_str() : NULL,
782 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
784 AudioBackend::ErrorCode error_code = NoError;
785 switch (_pcmi->state()) {
789 PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg;
790 error_code = AudioDeviceOpenError;
793 PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg;
794 error_code = AudioDeviceOpenError;
797 PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.")
799 error_code = SampleRateNotSupportedError;
802 PBD::error << _("AlsaAudioBackend: cannot set requested period size.")
804 error_code = PeriodSizeNotSupportedError;
807 PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.")
809 error_code = PeriodCountNotSupportedError;
812 PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg;
813 error_code = SampleFormatNotSupportedError;
816 PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg;
817 error_code = AudioDeviceOpenError;
821 if (_pcmi->state ()) {
822 delete _pcmi; _pcmi = 0;
831 if (_n_outputs != _pcmi->nplay ()) {
832 if (_n_outputs == 0) {
833 _n_outputs = _pcmi->nplay ();
835 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
837 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
840 if (_n_inputs != _pcmi->ncapt ()) {
841 if (_n_inputs == 0) {
842 _n_inputs = _pcmi->ncapt ();
844 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
846 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
849 if (_pcmi->fsize() != _samples_per_period) {
850 _samples_per_period = _pcmi->fsize();
851 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
854 if (_pcmi->fsamp() != _samplerate) {
855 _samplerate = _pcmi->fsamp();
856 engine.sample_rate_change (_samplerate);
857 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
860 _measure_latency = for_latency_measurement;
862 register_system_midi_ports();
864 if (register_system_audio_ports()) {
865 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
866 delete _pcmi; _pcmi = 0;
868 return PortRegistrationError;
871 engine.sample_rate_change (_samplerate);
872 engine.buffer_size_change (_samples_per_period);
874 if (engine.reestablish_ports ()) {
875 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
876 delete _pcmi; _pcmi = 0;
878 return PortReconnectError;
881 engine.reconnect_ports ();
883 _port_change_flag = false;
885 if (_realtime_pthread_create (SCHED_FIFO, -20, 100000,
886 &_main_thread, pthread_process, this))
888 if (pthread_create (&_main_thread, NULL, pthread_process, this))
890 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
891 delete _pcmi; _pcmi = 0;
894 return ProcessThreadStartError;
896 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
901 while (!_active && --timeout > 0) { Glib::usleep (1000); }
903 if (timeout == 0 || !_active) {
904 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
905 delete _pcmi; _pcmi = 0;
908 return ProcessThreadStartError;
915 AlsaAudioBackend::stop ()
923 if (pthread_join (_main_thread, &status)) {
924 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
928 while (!_rmidi_out.empty ()) {
929 AlsaMidiIO *m = _rmidi_out.back ();
931 _rmidi_out.pop_back ();
934 while (!_rmidi_in.empty ()) {
935 AlsaMidiIO *m = _rmidi_in.back ();
937 _rmidi_in.pop_back ();
942 delete _pcmi; _pcmi = 0;
945 return (_active == false) ? 0 : -1;
949 AlsaAudioBackend::freewheel (bool onoff)
951 _freewheeling = onoff;
956 AlsaAudioBackend::dsp_load () const
958 return 100.f * _dsp_load;
962 AlsaAudioBackend::raw_buffer_size (DataType t)
965 case DataType::AUDIO:
966 return _samples_per_period * sizeof(Sample);
968 return _max_buffer_size; // XXX not really limited
975 AlsaAudioBackend::sample_time ()
977 return _processed_samples;
981 AlsaAudioBackend::sample_time_at_cycle_start ()
983 return _processed_samples;
987 AlsaAudioBackend::samples_since_cycle_start ()
989 if (!_active || !_run || _freewheeling || _freewheel) {
992 if (_last_process_start == 0) {
996 const int64_t elapsed_time_us = g_get_monotonic_time() - _last_process_start;
997 return std::max((pframes_t)0, (pframes_t)rint(1e-6 * elapsed_time_us * _samplerate));
1002 AlsaAudioBackend::alsa_process_thread (void *arg)
1004 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
1005 boost::function<void ()> f = td->f;
1012 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
1014 pthread_t thread_id;
1015 pthread_attr_t attr;
1016 size_t stacksize = 100000;
1018 ThreadData* td = new ThreadData (this, func, stacksize);
1020 if (_realtime_pthread_create (SCHED_FIFO, -21, stacksize,
1021 &thread_id, alsa_process_thread, td)) {
1022 pthread_attr_init (&attr);
1023 pthread_attr_setstacksize (&attr, stacksize);
1024 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
1025 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
1026 pthread_attr_destroy (&attr);
1029 pthread_attr_destroy (&attr);
1032 _threads.push_back (thread_id);
1037 AlsaAudioBackend::join_process_threads ()
1041 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
1044 if (pthread_join (*i, &status)) {
1045 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
1054 AlsaAudioBackend::in_process_thread ()
1056 if (pthread_equal (_main_thread, pthread_self()) != 0) {
1060 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
1062 if (pthread_equal (*i, pthread_self ()) != 0) {
1070 AlsaAudioBackend::process_thread_count ()
1072 return _threads.size ();
1076 AlsaAudioBackend::update_latencies ()
1078 // trigger latency callback in RT thread (locked graph)
1079 port_connect_add_remove_callback();
1082 /* PORTENGINE API */
1085 AlsaAudioBackend::private_handle () const
1091 AlsaAudioBackend::my_name () const
1093 return _instance_name;
1097 AlsaAudioBackend::available () const
1099 return _run && _active;
1103 AlsaAudioBackend::port_name_size () const
1109 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
1111 if (!valid_port (port)) {
1112 PBD::error << _("AlsaBackend::set_port_name: Invalid Port(s)") << endmsg;
1115 return static_cast<AlsaPort*>(port)->set_name (_instance_name + ":" + name);
1119 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
1121 if (!valid_port (port)) {
1122 PBD::error << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
1123 return std::string ();
1125 return static_cast<AlsaPort*>(port)->name ();
1128 PortEngine::PortHandle
1129 AlsaAudioBackend::get_port_by_name (const std::string& name) const
1131 PortHandle port = (PortHandle) find_port (name);
1136 AlsaAudioBackend::get_ports (
1137 const std::string& port_name_pattern,
1138 DataType type, PortFlags flags,
1139 std::vector<std::string>& port_names) const
1143 bool use_regexp = false;
1144 if (port_name_pattern.size () > 0) {
1145 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
1149 for (size_t i = 0; i < _ports.size (); ++i) {
1150 AlsaPort* port = _ports[i];
1151 if ((port->type () == type) && flags == (port->flags () & flags)) {
1152 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
1153 port_names.push_back (port->name ());
1159 regfree (&port_regex);
1165 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
1167 if (!valid_port (port)) {
1168 return DataType::NIL;
1170 return static_cast<AlsaPort*>(port)->type ();
1173 PortEngine::PortHandle
1174 AlsaAudioBackend::register_port (
1175 const std::string& name,
1176 ARDOUR::DataType type,
1177 ARDOUR::PortFlags flags)
1179 if (name.size () == 0) { return 0; }
1180 if (flags & IsPhysical) { return 0; }
1181 return add_port (_instance_name + ":" + name, type, flags);
1184 PortEngine::PortHandle
1185 AlsaAudioBackend::add_port (
1186 const std::string& name,
1187 ARDOUR::DataType type,
1188 ARDOUR::PortFlags flags)
1190 assert(name.size ());
1191 if (find_port (name)) {
1192 PBD::error << _("AlsaBackend::register_port: Port already exists:")
1193 << " (" << name << ")" << endmsg;
1196 AlsaPort* port = NULL;
1198 case DataType::AUDIO:
1199 port = new AlsaAudioPort (*this, name, flags);
1201 case DataType::MIDI:
1202 port = new AlsaMidiPort (*this, name, flags);
1205 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
1209 _ports.push_back (port);
1215 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
1220 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
1221 std::vector<AlsaPort*>::iterator i = std::find (_ports.begin (), _ports.end (), static_cast<AlsaPort*>(port_handle));
1222 if (i == _ports.end ()) {
1223 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
1226 disconnect_all(port_handle);
1232 AlsaAudioBackend::register_system_audio_ports()
1236 const int a_ins = _n_inputs;
1237 const int a_out = _n_outputs;
1239 // TODO set latency depending on _periods_per_cycle and _samples_per_period
1242 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_input_latency);
1243 for (int i = 1; i <= a_ins; ++i) {
1245 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
1246 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1248 set_latency_range (p, false, lr);
1249 _system_inputs.push_back(static_cast<AlsaPort*>(p));
1252 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_output_latency);
1253 for (int i = 1; i <= a_out; ++i) {
1255 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
1256 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1258 set_latency_range (p, true, lr);
1259 _system_outputs.push_back(static_cast<AlsaPort*>(p));
1265 AlsaAudioBackend::register_system_midi_ports()
1267 std::map<std::string, std::string> devices;
1271 if (_midi_driver_option == get_standard_device_name(DeviceNone)) {
1273 } else if (_midi_driver_option == _("ALSA raw devices")) {
1274 get_alsa_rawmidi_device_names(devices);
1276 get_alsa_sequencer_names (devices);
1279 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
1280 struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first);
1282 if (!nfo->enabled) continue;
1285 if (_midi_driver_option == _("ALSA raw devices")) {
1286 mout = new AlsaRawMidiOut (i->second.c_str());
1288 mout = new AlsaSeqMidiOut (i->second.c_str());
1291 if (mout->state ()) {
1292 PBD::warning << string_compose (
1293 _("AlsaMidiOut: failed to open midi device '%1'."), i->second)
1297 mout->setup_timing(_samples_per_period, _samplerate);
1298 mout->sync_time (g_get_monotonic_time());
1299 if (mout->start ()) {
1300 PBD::warning << string_compose (
1301 _("AlsaMidiOut: failed to start midi device '%1'."), i->second)
1306 snprintf(tmp, sizeof(tmp), "system:midi_playback_%d", ++midi_ins);
1307 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1313 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
1314 set_latency_range (p, false, lr);
1315 static_cast<AlsaMidiPort*>(p)->set_n_periods(_periods_per_cycle); // TODO check MIDI alignment
1316 _system_midi_out.push_back(static_cast<AlsaPort*>(p));
1317 _rmidi_out.push_back (mout);
1322 if (_midi_driver_option == _("ALSA raw devices")) {
1323 midin = new AlsaRawMidiIn (i->second.c_str());
1325 midin = new AlsaSeqMidiIn (i->second.c_str());
1328 if (midin->state ()) {
1329 PBD::warning << string_compose (
1330 _("AlsaMidiIn: failed to open midi device '%1'."), i->second)
1334 midin->setup_timing(_samples_per_period, _samplerate);
1335 midin->sync_time (g_get_monotonic_time());
1336 if (midin->start ()) {
1337 PBD::warning << string_compose (
1338 _("AlsaMidiIn: failed to start midi device '%1'."), i->second)
1343 snprintf(tmp, sizeof(tmp), "system:midi_capture_%d", ++midi_outs);
1344 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1351 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
1352 set_latency_range (p, false, lr);
1353 _system_midi_in.push_back(static_cast<AlsaPort*>(p));
1354 _rmidi_in.push_back (midin);
1362 AlsaAudioBackend::unregister_ports (bool system_only)
1365 _system_inputs.clear();
1366 _system_outputs.clear();
1367 _system_midi_in.clear();
1368 _system_midi_out.clear();
1369 while (i < _ports.size ()) {
1370 AlsaPort* port = _ports[i];
1371 if (! system_only || (port->is_physical () && port->is_terminal ())) {
1372 port->disconnect_all ();
1374 _ports.erase (_ports.begin() + i);
1382 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
1384 AlsaPort* src_port = find_port (src);
1385 AlsaPort* dst_port = find_port (dst);
1388 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
1389 << " (" << src <<")" << endmsg;
1393 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
1394 << " (" << dst <<")" << endmsg;
1397 return src_port->connect (dst_port);
1401 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
1403 AlsaPort* src_port = find_port (src);
1404 AlsaPort* dst_port = find_port (dst);
1406 if (!src_port || !dst_port) {
1407 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1410 return src_port->disconnect (dst_port);
1414 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1416 AlsaPort* dst_port = find_port (dst);
1417 if (!valid_port (src)) {
1418 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1422 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1423 << " (" << dst << ")" << endmsg;
1426 return static_cast<AlsaPort*>(src)->connect (dst_port);
1430 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1432 AlsaPort* dst_port = find_port (dst);
1433 if (!valid_port (src) || !dst_port) {
1434 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1437 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1441 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1443 if (!valid_port (port)) {
1444 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1447 static_cast<AlsaPort*>(port)->disconnect_all ();
1452 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1454 if (!valid_port (port)) {
1455 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1458 return static_cast<AlsaPort*>(port)->is_connected ();
1462 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1464 AlsaPort* dst_port = find_port (dst);
1465 if (!valid_port (src) || !dst_port) {
1466 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1469 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1473 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1475 if (!valid_port (port)) {
1476 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1479 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1483 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1485 if (!valid_port (port)) {
1486 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1490 assert (0 == names.size ());
1492 const std::vector<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1494 for (std::vector<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1495 names.push_back ((*i)->name ());
1498 return (int)names.size ();
1503 AlsaAudioBackend::midi_event_get (
1504 pframes_t& timestamp,
1505 size_t& size, uint8_t** buf, void* port_buffer,
1506 uint32_t event_index)
1508 assert (buf && port_buffer);
1509 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1510 if (event_index >= source.size ()) {
1513 AlsaMidiEvent * const event = source[event_index].get ();
1515 timestamp = event->timestamp ();
1516 size = event->size ();
1517 *buf = event->data ();
1522 AlsaAudioBackend::midi_event_put (
1524 pframes_t timestamp,
1525 const uint8_t* buffer, size_t size)
1527 assert (buffer && port_buffer);
1528 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1529 if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
1531 // nevermind, ::get_buffer() sorts events
1532 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1533 (pframes_t)dst.back ()->timestamp (), timestamp);
1536 dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
1541 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1543 assert (port_buffer);
1544 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1548 AlsaAudioBackend::midi_clear (void* port_buffer)
1550 assert (port_buffer);
1551 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1559 AlsaAudioBackend::can_monitor_input () const
1565 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1571 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1577 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1582 /* Latency management */
1585 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1587 if (!valid_port (port)) {
1588 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1590 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1594 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1597 if (!valid_port (port)) {
1598 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1603 AlsaPort *p = static_cast<AlsaPort*>(port);
1606 r = p->latency_range (for_playback);
1607 if (p->is_physical() && p->is_terminal()) {
1608 if (p->is_input() && for_playback) {
1609 r.min += _samples_per_period;
1610 r.max += _samples_per_period;
1612 if (p->is_output() && !for_playback) {
1613 r.min += _samples_per_period;
1614 r.max += _samples_per_period;
1620 /* Discovering physical ports */
1623 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1625 if (!valid_port (port)) {
1626 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1629 return static_cast<AlsaPort*>(port)->is_physical ();
1633 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1635 for (size_t i = 0; i < _ports.size (); ++i) {
1636 AlsaPort* port = _ports[i];
1637 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1638 port_names.push_back (port->name ());
1644 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
1646 for (size_t i = 0; i < _ports.size (); ++i) {
1647 AlsaPort* port = _ports[i];
1648 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
1649 port_names.push_back (port->name ());
1655 AlsaAudioBackend::n_physical_outputs () const
1659 for (size_t i = 0; i < _ports.size (); ++i) {
1660 AlsaPort* port = _ports[i];
1661 if (port->is_output () && port->is_physical ()) {
1662 switch (port->type ()) {
1663 case DataType::AUDIO: ++n_audio; break;
1664 case DataType::MIDI: ++n_midi; break;
1670 cc.set (DataType::AUDIO, n_audio);
1671 cc.set (DataType::MIDI, n_midi);
1676 AlsaAudioBackend::n_physical_inputs () const
1680 for (size_t i = 0; i < _ports.size (); ++i) {
1681 AlsaPort* port = _ports[i];
1682 if (port->is_input () && port->is_physical ()) {
1683 switch (port->type ()) {
1684 case DataType::AUDIO: ++n_audio; break;
1685 case DataType::MIDI: ++n_midi; break;
1691 cc.set (DataType::AUDIO, n_audio);
1692 cc.set (DataType::MIDI, n_midi);
1696 /* Getting access to the data buffer for a port */
1699 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
1702 assert (valid_port (port));
1703 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
1706 /* Engine Process */
1708 AlsaAudioBackend::main_process_thread ()
1710 AudioEngine::thread_init_callback (this);
1712 _processed_samples = 0;
1715 _pcmi->pcm_start ();
1716 int no_proc_errors = 0;
1717 const int bailout = 2 * _samplerate / _samples_per_period;
1719 manager.registration_callback();
1720 manager.graph_order_callback();
1726 if (_freewheeling != _freewheel) {
1727 _freewheel = _freewheeling;
1728 engine.freewheel_callback (_freewheel);
1732 nr = _pcmi->pcm_wait ();
1734 if (_pcmi->state () > 0) {
1738 if (_pcmi->state () < 0) {
1739 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
1742 if (no_proc_errors > bailout) {
1745 _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."),
1751 while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) {
1753 clock1 = g_get_monotonic_time();
1756 _pcmi->capt_init (_samples_per_period);
1757 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
1758 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
1760 _pcmi->capt_done (_samples_per_period);
1762 /* de-queue incoming midi*/
1764 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1765 assert (_rmidi_in.size() > i);
1766 AlsaMidiIn *rm = _rmidi_in.at(i);
1767 void *bptr = (*it)->get_buffer(0);
1769 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1770 size_t size = sizeof(data);
1772 while (rm->recv_event (time, data, size)) {
1773 midi_event_put(bptr, time, data, size);
1774 size = sizeof(data);
1776 rm->sync_time (clock1);
1779 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1780 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1783 /* call engine process callback */
1784 _last_process_start = g_get_monotonic_time();
1785 if (engine.process_callback (_samples_per_period)) {
1791 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1792 static_cast<AlsaMidiPort*>(*it)->next_period();
1795 /* queue outgoing midi */
1797 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
1798 assert (_rmidi_out.size() > i);
1799 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
1800 AlsaMidiOut *rm = _rmidi_out.at(i);
1801 rm->sync_time (clock1);
1802 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
1803 rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
1807 /* write back audio */
1809 _pcmi->play_init (_samples_per_period);
1810 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
1811 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
1813 for (; i < _pcmi->nplay (); ++i) {
1814 _pcmi->clear_chan (i, _samples_per_period);
1816 _pcmi->play_done (_samples_per_period);
1817 nr -= _samples_per_period;
1818 _processed_samples += _samples_per_period;
1820 _dsp_load_calc.set_max_time(_samplerate, _samples_per_period);
1821 _dsp_load_calc.set_start_timestamp_us (clock1);
1822 _dsp_load_calc.set_stop_timestamp_us (g_get_monotonic_time());
1823 _dsp_load = _dsp_load_calc.get_dsp_load ();
1826 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
1829 fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n",
1830 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
1836 // zero audio input buffers
1837 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1838 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
1841 clock1 = g_get_monotonic_time();
1843 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
1844 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
1845 AlsaMidiIn *rm = _rmidi_in.at(i);
1846 void *bptr = (*it)->get_buffer(0);
1847 midi_clear(bptr); // zero midi buffer
1849 // TODO add an API call for this.
1851 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
1852 size_t size = sizeof(data);
1853 while (rm->recv_event (time, data, size)) {
1854 ; // discard midi-data from HW.
1856 rm->sync_time (clock1);
1859 _last_process_start = 0;
1860 if (engine.process_callback (_samples_per_period)) {
1866 // drop all outgoing MIDI messages
1867 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1868 void *bptr = (*it)->get_buffer(0);
1873 Glib::usleep (100); // don't hog cpu
1876 bool connections_changed = false;
1877 bool ports_changed = false;
1878 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
1879 if (_port_change_flag) {
1880 ports_changed = true;
1881 _port_change_flag = false;
1883 if (!_port_connection_queue.empty ()) {
1884 connections_changed = true;
1886 while (!_port_connection_queue.empty ()) {
1887 PortConnectData *c = _port_connection_queue.back ();
1888 manager.connect_callback (c->a, c->b, c->c);
1889 _port_connection_queue.pop_back ();
1892 pthread_mutex_unlock (&_port_callback_mutex);
1894 if (ports_changed) {
1895 manager.registration_callback();
1897 if (connections_changed) {
1898 manager.graph_order_callback();
1900 if (connections_changed || ports_changed) {
1901 engine.latency_callback(false);
1902 engine.latency_callback(true);
1909 engine.halted_callback("ALSA I/O error.");
1915 /******************************************************************************/
1917 static boost::shared_ptr<AlsaAudioBackend> _instance;
1919 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
1920 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
1921 static int deinstantiate ();
1922 static bool already_configured ();
1923 static bool available ();
1925 static ARDOUR::AudioBackendInfo _descriptor = {
1934 static boost::shared_ptr<AudioBackend>
1935 backend_factory (AudioEngine& e)
1938 _instance.reset (new AlsaAudioBackend (e, _descriptor));
1944 instantiate (const std::string& arg1, const std::string& /* arg2 */)
1946 s_instance_name = arg1;
1958 already_configured ()
1969 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
1971 return &_descriptor;
1975 /******************************************************************************/
1976 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
1981 _capture_latency_range.min = 0;
1982 _capture_latency_range.max = 0;
1983 _playback_latency_range.min = 0;
1984 _playback_latency_range.max = 0;
1987 AlsaPort::~AlsaPort () {
1992 int AlsaPort::connect (AlsaPort *port)
1995 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
1999 if (type () != port->type ()) {
2000 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
2004 if (is_output () && port->is_output ()) {
2005 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
2009 if (is_input () && port->is_input ()) {
2010 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
2015 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
2019 if (is_connected (port)) {
2020 #if 0 // don't bother to warn about this for now. just ignore it
2021 PBD::error << _("AlsaPort::connect (): ports are already connected:")
2022 << " (" << name () << ") -> (" << port->name () << ")"
2028 _connect (port, true);
2033 void AlsaPort::_connect (AlsaPort *port, bool callback)
2035 _connections.push_back (port);
2037 port->_connect (this, false);
2038 _alsa_backend.port_connect_callback (name(), port->name(), true);
2042 int AlsaPort::disconnect (AlsaPort *port)
2045 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
2049 if (!is_connected (port)) {
2050 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
2051 << " (" << name () << ") -> (" << port->name () << ")"
2055 _disconnect (port, true);
2059 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
2061 std::vector<AlsaPort*>::iterator it = std::find (_connections.begin (), _connections.end (), port);
2063 assert (it != _connections.end ());
2065 _connections.erase (it);
2068 port->_disconnect (this, false);
2069 _alsa_backend.port_connect_callback (name(), port->name(), false);
2074 void AlsaPort::disconnect_all ()
2076 while (!_connections.empty ()) {
2077 _connections.back ()->_disconnect (this, false);
2078 _alsa_backend.port_connect_callback (name(), _connections.back ()->name(), false);
2079 _connections.pop_back ();
2084 AlsaPort::is_connected (const AlsaPort *port) const
2086 return std::find (_connections.begin (), _connections.end (), port) != _connections.end ();
2089 bool AlsaPort::is_physically_connected () const
2091 for (std::vector<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
2092 if ((*it)->is_physical ()) {
2099 /******************************************************************************/
2101 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2102 : AlsaPort (b, name, flags)
2104 memset (_buffer, 0, sizeof (_buffer));
2105 mlock(_buffer, sizeof (_buffer));
2108 AlsaAudioPort::~AlsaAudioPort () { }
2110 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
2113 std::vector<AlsaPort*>::const_iterator it = get_connections ().begin ();
2114 if (it == get_connections ().end ()) {
2115 memset (_buffer, 0, n_samples * sizeof (Sample));
2117 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
2118 assert (source && source->is_output ());
2119 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
2120 while (++it != get_connections ().end ()) {
2121 source = static_cast<const AlsaAudioPort*>(*it);
2122 assert (source && source->is_output ());
2123 Sample* dst = buffer ();
2124 const Sample* src = source->const_buffer ();
2125 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
2135 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2136 : AlsaPort (b, name, flags)
2140 _buffer[0].clear ();
2141 _buffer[1].clear ();
2144 AlsaMidiPort::~AlsaMidiPort () { }
2146 struct MidiEventSorter {
2147 bool operator() (const boost::shared_ptr<AlsaMidiEvent>& a, const boost::shared_ptr<AlsaMidiEvent>& b) {
2152 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
2155 (_buffer[_bufperiod]).clear ();
2156 for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
2157 i != get_connections ().end ();
2159 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
2160 for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2161 (_buffer[_bufperiod]).push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
2164 std::sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
2166 return &(_buffer[_bufperiod]);
2169 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2171 , _timestamp (timestamp)
2175 _data = (uint8_t*) malloc (size);
2176 memcpy (_data, data, size);
2180 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
2181 : _size (other.size ())
2182 , _timestamp (other.timestamp ())
2185 if (other.size () && other.const_data ()) {
2186 _data = (uint8_t*) malloc (other.size ());
2187 memcpy (_data, other.const_data (), other.size ());
2191 AlsaMidiEvent::~AlsaMidiEvent () {