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 <boost/foreach.hpp>
27 #include <boost/tokenizer.hpp>
29 #include "alsa_audiobackend.h"
31 #include "pbd/compose.h"
32 #include "pbd/convert.h"
33 #include "pbd/error.h"
34 #include "pbd/file_utils.h"
35 #include "pbd/pthread_utils.h"
37 #include "ardour/filesystem_paths.h"
38 #include "ardour/port_manager.h"
39 #include "ardouralsautil/devicelist.h"
42 using namespace ARDOUR;
44 static std::string s_instance_name;
45 size_t AlsaAudioBackend::_max_buffer_size = 8192;
46 std::vector<std::string> AlsaAudioBackend::_midi_options;
47 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_input_audio_device_status;
48 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_output_audio_device_status;
49 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_duplex_audio_device_status;
50 std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_midi_device_status;
52 ALSADeviceInfo AlsaAudioBackend::_input_audio_device_info;
53 ALSADeviceInfo AlsaAudioBackend::_output_audio_device_info;
55 AlsaAudioBackend::AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info)
56 : AudioBackend (e, info)
61 , _freewheeling (false)
62 , _measure_latency (false)
63 , _last_process_start (0)
64 , _input_audio_device("")
65 , _output_audio_device("")
66 , _midi_driver_option(get_standard_device_name(DeviceNone))
68 , _samples_per_period (1024)
69 , _periods_per_cycle (2)
72 , _systemic_audio_input_latency (0)
73 , _systemic_audio_output_latency (0)
74 , _midi_device_thread_active (false)
76 , _processed_samples (0)
77 , _port_change_flag (false)
79 _instance_name = s_instance_name;
80 pthread_mutex_init (&_port_callback_mutex, 0);
81 pthread_mutex_init (&_device_port_mutex, 0);
82 _input_audio_device_info.valid = false;
83 _output_audio_device_info.valid = false;
85 _port_connection_queue.reserve (128);
88 AlsaAudioBackend::~AlsaAudioBackend ()
90 pthread_mutex_destroy (&_port_callback_mutex);
91 pthread_mutex_destroy (&_device_port_mutex);
94 /* AUDIOBACKEND API */
97 AlsaAudioBackend::name () const
103 AlsaAudioBackend::is_realtime () const
108 std::vector<AudioBackend::DeviceStatus>
109 AlsaAudioBackend::enumerate_devices () const
111 _duplex_audio_device_status.clear();
112 std::map<std::string, std::string> devices;
113 get_alsa_audio_device_names(devices);
114 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
115 if (_input_audio_device == "") _input_audio_device = i->first;
116 if (_output_audio_device == "") _output_audio_device = i->first;
117 _duplex_audio_device_status.push_back (DeviceStatus (i->first, true));
119 return _duplex_audio_device_status;
122 std::vector<AudioBackend::DeviceStatus>
123 AlsaAudioBackend::enumerate_input_devices () const
125 _input_audio_device_status.clear();
126 std::map<std::string, std::string> devices;
127 get_alsa_audio_device_names(devices, HalfDuplexIn);
128 _input_audio_device_status.push_back (DeviceStatus (get_standard_device_name(DeviceNone), true));
129 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
130 if (_input_audio_device == "") _input_audio_device = i->first;
131 _input_audio_device_status.push_back (DeviceStatus (i->first, true));
133 return _input_audio_device_status;
136 std::vector<AudioBackend::DeviceStatus>
137 AlsaAudioBackend::enumerate_output_devices () const
139 _output_audio_device_status.clear();
140 std::map<std::string, std::string> devices;
141 get_alsa_audio_device_names(devices, HalfDuplexOut);
142 _output_audio_device_status.push_back (DeviceStatus (get_standard_device_name(DeviceNone), true));
143 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
144 if (_output_audio_device == "") _output_audio_device = i->first;
145 _output_audio_device_status.push_back (DeviceStatus (i->first, true));
147 return _output_audio_device_status;
151 AlsaAudioBackend::available_sample_rates2 (const std::string& input_device, const std::string& output_device) const
153 std::vector<float> sr;
154 if (input_device == get_standard_device_name(DeviceNone) && output_device == get_standard_device_name(DeviceNone)) {
157 else if (input_device == get_standard_device_name(DeviceNone)) {
158 sr = available_sample_rates (output_device);
160 else if (output_device == get_standard_device_name(DeviceNone)) {
161 sr = available_sample_rates (input_device);
163 std::vector<float> sr_in = available_sample_rates (input_device);
164 std::vector<float> sr_out = available_sample_rates (output_device);
165 std::set_intersection (sr_in.begin(), sr_in.end(), sr_out.begin(), sr_out.end(), std::back_inserter(sr));
171 AlsaAudioBackend::available_sample_rates (const std::string& device) const
173 ALSADeviceInfo *nfo = NULL;
174 std::vector<float> sr;
175 if (device == get_standard_device_name(DeviceNone)) {
178 if (device == _input_audio_device && _input_audio_device_info.valid) {
179 nfo = &_input_audio_device_info;
181 else if (device == _output_audio_device && _output_audio_device_info.valid) {
182 nfo = &_output_audio_device_info;
185 static const float avail_rates [] = { 8000, 22050.0, 24000.0, 44100.0, 48000.0, 88200.0, 96000.0, 176400.0, 192000.0 };
187 for (size_t i = 0 ; i < sizeof(avail_rates) / sizeof(float); ++i) {
188 if (!nfo || (avail_rates[i] >= nfo->min_rate && avail_rates[i] <= nfo->max_rate)) {
189 sr.push_back (avail_rates[i]);
196 std::vector<uint32_t>
197 AlsaAudioBackend::available_buffer_sizes2 (const std::string& input_device, const std::string& output_device) const
199 std::vector<uint32_t> bs;
200 if (input_device == get_standard_device_name(DeviceNone) && output_device == get_standard_device_name(DeviceNone)) {
203 else if (input_device == get_standard_device_name(DeviceNone)) {
204 bs = available_buffer_sizes (output_device);
206 else if (output_device == get_standard_device_name(DeviceNone)) {
207 bs = available_buffer_sizes (input_device);
209 std::vector<uint32_t> bs_in = available_buffer_sizes (input_device);
210 std::vector<uint32_t> bs_out = available_buffer_sizes (output_device);
211 std::set_intersection (bs_in.begin(), bs_in.end(), bs_out.begin(), bs_out.end(), std::back_inserter(bs));
216 std::vector<uint32_t>
217 AlsaAudioBackend::available_buffer_sizes (const std::string& device) const
219 ALSADeviceInfo *nfo = NULL;
220 std::vector<uint32_t> bs;
221 if (device == get_standard_device_name(DeviceNone)) {
224 if (device == _input_audio_device && _input_audio_device_info.valid) {
225 nfo = &_input_audio_device_info;
227 else if (device == _output_audio_device && _output_audio_device_info.valid) {
228 nfo = &_output_audio_device_info;
231 static const unsigned long avail_sizes [] = { 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192 };
233 for (size_t i = 0 ; i < sizeof(avail_sizes) / sizeof(unsigned long); ++i) {
234 if (!nfo || (avail_sizes[i] >= nfo->min_size && avail_sizes[i] <= nfo->max_size)) {
235 bs.push_back (avail_sizes[i]);
242 AlsaAudioBackend::available_input_channel_count (const std::string& device) const
244 if (device == get_standard_device_name(DeviceNone)) {
247 if (device == _input_audio_device && _input_audio_device_info.valid) {
248 return _input_audio_device_info.max_channels;
254 AlsaAudioBackend::available_output_channel_count (const std::string& device) const
256 if (device == get_standard_device_name(DeviceNone)) {
259 if (device == _output_audio_device && _output_audio_device_info.valid) {
260 return _output_audio_device_info.max_channels;
265 std::vector<uint32_t>
266 AlsaAudioBackend::available_period_sizes (const std::string& driver) const
268 std::vector<uint32_t> ps;
275 AlsaAudioBackend::can_change_sample_rate_when_running () const
281 AlsaAudioBackend::can_change_buffer_size_when_running () const
283 return false; // why not? :)
287 AlsaAudioBackend::set_input_device_name (const std::string& d)
289 if (_input_audio_device == d) {
292 _input_audio_device = d;
294 if (d == get_standard_device_name(DeviceNone)) {
295 _input_audio_device_info.valid = false;
298 std::string alsa_device;
299 std::map<std::string, std::string> devices;
301 get_alsa_audio_device_names(devices, HalfDuplexIn);
302 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
304 alsa_device = i->second;
308 if (alsa_device == "") {
309 _input_audio_device_info.valid = false;
312 /* device will be busy once used, hence cache the parameters */
313 /* return */ get_alsa_device_parameters (alsa_device.c_str(), true, &_input_audio_device_info);
318 AlsaAudioBackend::set_output_device_name (const std::string& d)
320 if (_output_audio_device == d) {
324 _output_audio_device = d;
326 if (d == get_standard_device_name(DeviceNone)) {
327 _output_audio_device_info.valid = false;
330 std::string alsa_device;
331 std::map<std::string, std::string> devices;
333 get_alsa_audio_device_names(devices, HalfDuplexOut);
334 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
336 alsa_device = i->second;
340 if (alsa_device == "") {
341 _output_audio_device_info.valid = false;
344 /* return */ get_alsa_device_parameters (alsa_device.c_str(), true, &_output_audio_device_info);
349 AlsaAudioBackend::set_device_name (const std::string& d)
352 rv |= set_input_device_name (d);
353 rv |= set_output_device_name (d);
358 AlsaAudioBackend::set_sample_rate (float sr)
360 if (sr <= 0) { return -1; }
362 engine.sample_rate_change (sr);
367 AlsaAudioBackend::set_peridod_size (uint32_t n)
369 if (n == 0 || n > 3) {
375 _periods_per_cycle = n;
380 AlsaAudioBackend::set_buffer_size (uint32_t bs)
382 if (bs <= 0 || bs >= _max_buffer_size) {
388 _samples_per_period = bs;
389 engine.buffer_size_change (bs);
394 AlsaAudioBackend::set_interleaved (bool yn)
396 if (!yn) { return 0; }
401 AlsaAudioBackend::set_input_channels (uint32_t cc)
408 AlsaAudioBackend::set_output_channels (uint32_t cc)
415 AlsaAudioBackend::set_systemic_input_latency (uint32_t sl)
417 _systemic_audio_input_latency = sl;
419 update_systemic_audio_latencies();
425 AlsaAudioBackend::set_systemic_output_latency (uint32_t sl)
427 _systemic_audio_output_latency = sl;
429 update_systemic_audio_latencies();
435 AlsaAudioBackend::set_systemic_midi_input_latency (std::string const device, uint32_t sl)
437 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
439 nfo->systemic_input_latency = sl;
440 if (_run && nfo->enabled) {
441 update_systemic_midi_latencies ();
447 AlsaAudioBackend::set_systemic_midi_output_latency (std::string const device, uint32_t sl)
449 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
451 nfo->systemic_output_latency = sl;
452 if (_run && nfo->enabled) {
453 update_systemic_midi_latencies ();
459 AlsaAudioBackend::update_systemic_audio_latencies ()
461 const uint32_t lcpp = (_periods_per_cycle - 2) * _samples_per_period;
464 lr.min = lr.max = lcpp + (_measure_latency ? 0 : _systemic_audio_input_latency);
465 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
466 set_latency_range (*it, true, lr);
469 lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_output_latency);
470 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
471 set_latency_range (*it, false, lr);
477 AlsaAudioBackend::update_systemic_midi_latencies ()
479 pthread_mutex_lock (&_device_port_mutex);
481 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
482 assert (_rmidi_out.size() > i);
483 AlsaMidiOut *rm = _rmidi_out.at(i);
484 struct AlsaMidiDeviceInfo * nfo = midi_device_info (rm->name());
487 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
488 set_latency_range (*it, false, lr);
492 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
493 assert (_rmidi_in.size() > i);
494 AlsaMidiIO *rm = _rmidi_in.at(i);
495 struct AlsaMidiDeviceInfo * nfo = midi_device_info (rm->name());
498 lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
499 set_latency_range (*it, true, lr);
501 pthread_mutex_unlock (&_device_port_mutex);
505 /* Retrieving parameters */
507 AlsaAudioBackend::device_name () const
509 if (_input_audio_device != get_standard_device_name(DeviceNone)) {
510 return _input_audio_device;
512 if (_output_audio_device != get_standard_device_name(DeviceNone)) {
513 return _output_audio_device;
519 AlsaAudioBackend::input_device_name () const
521 return _input_audio_device;
525 AlsaAudioBackend::output_device_name () const
527 return _output_audio_device;
531 AlsaAudioBackend::sample_rate () const
537 AlsaAudioBackend::buffer_size () const
539 return _samples_per_period;
543 AlsaAudioBackend::period_size () const
545 return _periods_per_cycle;
549 AlsaAudioBackend::interleaved () const
555 AlsaAudioBackend::input_channels () const
561 AlsaAudioBackend::output_channels () const
567 AlsaAudioBackend::systemic_input_latency () const
569 return _systemic_audio_input_latency;
573 AlsaAudioBackend::systemic_output_latency () const
575 return _systemic_audio_output_latency;
579 AlsaAudioBackend::systemic_midi_input_latency (std::string const device) const
581 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
583 return nfo->systemic_input_latency;
587 AlsaAudioBackend::systemic_midi_output_latency (std::string const device) const
589 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
591 return nfo->systemic_output_latency;
595 struct AlsaAudioBackend::AlsaMidiDeviceInfo *
596 AlsaAudioBackend::midi_device_info(std::string const name) const {
597 for (std::map<std::string, struct AlsaMidiDeviceInfo*>::const_iterator i = _midi_devices.begin (); i != _midi_devices.end(); ++i) {
598 if (i->first == name) {
603 assert(_midi_driver_option != get_standard_device_name(DeviceNone));
605 std::map<std::string, std::string> devices;
606 if (_midi_driver_option == _("ALSA raw devices")) {
607 get_alsa_rawmidi_device_names(devices);
609 get_alsa_sequencer_names (devices);
612 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
613 if (i->first == name) {
614 _midi_devices[name] = new AlsaMidiDeviceInfo();
615 return _midi_devices[name];
621 std::vector<std::string>
622 AlsaAudioBackend::enumerate_midi_options () const
624 if (_midi_options.empty()) {
625 _midi_options.push_back (_("ALSA raw devices"));
626 _midi_options.push_back (_("ALSA sequencer"));
627 _midi_options.push_back (get_standard_device_name(DeviceNone));
629 return _midi_options;
632 std::vector<AudioBackend::DeviceStatus>
633 AlsaAudioBackend::enumerate_midi_devices () const
635 _midi_device_status.clear();
636 std::map<std::string, std::string> devices;
638 if (_midi_driver_option == _("ALSA raw devices")) {
639 get_alsa_rawmidi_device_names (devices);
641 else if (_midi_driver_option == _("ALSA sequencer")) {
642 get_alsa_sequencer_names (devices);
645 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
646 _midi_device_status.push_back (DeviceStatus (i->first, true));
648 return _midi_device_status;
652 AlsaAudioBackend::set_midi_option (const std::string& opt)
654 if (opt != get_standard_device_name(DeviceNone) && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
657 if (_run && _midi_driver_option != opt) {
660 _midi_driver_option = opt;
665 AlsaAudioBackend::midi_option () const
667 return _midi_driver_option;
671 AlsaAudioBackend::set_midi_device_enabled (std::string const device, bool enable)
673 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
675 const bool prev_enabled = nfo->enabled;
676 nfo->enabled = enable;
678 if (_run && prev_enabled != enable) {
679 // XXX actually we should not change system-ports while running,
680 // because iterators in main_process_thread will become invalid.
682 // Luckily the engine dialog does not call this while the engine is running,
683 // This code is currently not used.
685 // add ports for the given device
686 register_system_midi_ports(device);
688 // remove all ports provided by the given device
689 pthread_mutex_lock (&_device_port_mutex);
691 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end ();) {
692 assert (_rmidi_out.size() > i);
693 AlsaMidiOut *rm = _rmidi_out.at(i);
694 if (rm->name () != device) { ++it; ++i; continue; }
695 it = _system_midi_out.erase (it);
696 unregister_port (*it);
698 _rmidi_out.erase (_rmidi_out.begin() + i);
703 for (std::vector<AlsaPort*>::iterator it = _system_midi_in.begin (); it != _system_midi_in.end ();) {
704 assert (_rmidi_in.size() > i);
705 AlsaMidiIn *rm = _rmidi_in.at(i);
706 if (rm->name () != device) { ++it; ++i; continue; }
707 it = _system_midi_in.erase (it);
708 unregister_port (*it);
710 _rmidi_in.erase (_rmidi_in.begin() + i);
713 pthread_mutex_unlock (&_device_port_mutex);
715 update_systemic_midi_latencies ();
721 AlsaAudioBackend::midi_device_enabled (std::string const device) const
723 struct AlsaMidiDeviceInfo * nfo = midi_device_info(device);
724 if (!nfo) return false;
730 static void * pthread_process (void *arg)
732 AlsaAudioBackend *d = static_cast<AlsaAudioBackend *>(arg);
733 d->main_process_thread ();
739 AlsaAudioBackend::_start (bool for_latency_measurement)
741 if (!_active && _run) {
742 // recover from 'halted', reap threads
746 if (_active || _run) {
747 if (for_latency_measurement != _measure_latency) {
748 _measure_latency = for_latency_measurement;
749 update_systemic_audio_latencies();
750 update_systemic_midi_latencies ();
751 PBD::info << _("AlsaAudioBackend: reload latencies.") << endmsg;
754 PBD::info << _("AlsaAudioBackend: already active.") << endmsg;
755 return BackendReinitializationError;
758 if (_ports.size () || _portmap.size ()) {
759 PBD::warning << _("AlsaAudioBackend: recovering from unclean shutdown, port registry is not empty.") << endmsg;
760 _system_inputs.clear();
761 _system_outputs.clear();
762 _system_midi_in.clear();
763 _system_midi_out.clear();
768 /* reset internal state */
770 _freewheeling = false;
772 _last_process_start = 0;
774 _device_reservation.release_device();
776 assert(_rmidi_in.size() == 0);
777 assert(_rmidi_out.size() == 0);
781 std::string audio_device;
782 std::string alsa_device;
783 std::map<std::string, std::string> devices;
785 if (_input_audio_device == get_standard_device_name(DeviceNone) && _output_audio_device == get_standard_device_name(DeviceNone)) {
786 PBD::error << _("AlsaAudioBackend: At least one of input or output device needs to be set.");
787 return AudioDeviceInvalidError;
790 if (_input_audio_device != _output_audio_device) {
791 if (_input_audio_device != get_standard_device_name(DeviceNone) && _output_audio_device != get_standard_device_name(DeviceNone)) {
792 PBD::error << _("AlsaAudioBackend: Cannot use two different devices.");
793 return AudioDeviceInvalidError;
795 if (_input_audio_device != get_standard_device_name(DeviceNone)) {
796 get_alsa_audio_device_names(devices, HalfDuplexIn);
797 audio_device = _input_audio_device;
800 get_alsa_audio_device_names(devices, HalfDuplexOut);
801 audio_device = _output_audio_device;
805 get_alsa_audio_device_names(devices);
806 audio_device = _input_audio_device;
810 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
811 if (i->first == audio_device) {
812 alsa_device = i->second;
816 if (alsa_device == "") {
817 PBD::error << _("AlsaAudioBackend: Cannot find configured device. Is it still connected?");
818 return AudioDeviceNotAvailableError;
821 _device_reservation.acquire_device(alsa_device.c_str());
822 _pcmi = new Alsa_pcmi (
823 (duplex & 2) ? alsa_device.c_str() : NULL,
824 (duplex & 1) ? alsa_device.c_str() : NULL,
826 _samplerate, _samples_per_period,
827 _periods_per_cycle, /* _periods_per_cycle */ 2,
830 AudioBackend::ErrorCode error_code = NoError;
831 switch (_pcmi->state()) {
835 PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg;
836 error_code = AudioDeviceOpenError;
839 PBD::error << _("AlsaAudioBackend: failed to allocate parameters.") << endmsg;
840 error_code = AudioDeviceOpenError;
843 PBD::error << _("AlsaAudioBackend: cannot set requested sample rate.")
845 error_code = SampleRateNotSupportedError;
848 PBD::error << _("AlsaAudioBackend: cannot set requested period size.")
850 error_code = PeriodSizeNotSupportedError;
853 PBD::error << _("AlsaAudioBackend: cannot set requested number of periods.")
855 error_code = PeriodCountNotSupportedError;
858 PBD::error << _("AlsaAudioBackend: unsupported sample format.") << endmsg;
859 error_code = SampleFormatNotSupportedError;
862 PBD::error << _("AlsaAudioBackend: initialization failed.") << endmsg;
863 error_code = AudioDeviceOpenError;
867 if (_pcmi->state ()) {
868 delete _pcmi; _pcmi = 0;
869 _device_reservation.release_device();
877 if (_n_outputs != _pcmi->nplay ()) {
878 if (_n_outputs == 0) {
879 _n_outputs = _pcmi->nplay ();
881 _n_outputs = std::min (_n_outputs, _pcmi->nplay ());
883 PBD::warning << _("AlsaAudioBackend: adjusted output channel count to match device.") << endmsg;
886 if (_n_inputs != _pcmi->ncapt ()) {
887 if (_n_inputs == 0) {
888 _n_inputs = _pcmi->ncapt ();
890 _n_inputs = std::min (_n_inputs, _pcmi->ncapt ());
892 PBD::warning << _("AlsaAudioBackend: adjusted input channel count to match device.") << endmsg;
895 if (_pcmi->fsize() != _samples_per_period) {
896 _samples_per_period = _pcmi->fsize();
897 PBD::warning << _("AlsaAudioBackend: samples per period does not match.") << endmsg;
900 if (_pcmi->fsamp() != _samplerate) {
901 _samplerate = _pcmi->fsamp();
902 engine.sample_rate_change (_samplerate);
903 PBD::warning << _("AlsaAudioBackend: sample rate does not match.") << endmsg;
906 _measure_latency = for_latency_measurement;
908 register_system_midi_ports();
910 if (register_system_audio_ports()) {
911 PBD::error << _("AlsaAudioBackend: failed to register system ports.") << endmsg;
912 delete _pcmi; _pcmi = 0;
913 _device_reservation.release_device();
914 return PortRegistrationError;
917 engine.sample_rate_change (_samplerate);
918 engine.buffer_size_change (_samples_per_period);
920 if (engine.reestablish_ports ()) {
921 PBD::error << _("AlsaAudioBackend: Could not re-establish ports.") << endmsg;
922 delete _pcmi; _pcmi = 0;
923 _device_reservation.release_device();
924 return PortReconnectError;
927 engine.reconnect_ports ();
929 _port_change_flag = false;
931 if (pbd_realtime_pthread_create (PBD_SCHED_FIFO, -20, 100000,
932 &_main_thread, pthread_process, this))
934 if (pthread_create (&_main_thread, NULL, pthread_process, this))
936 PBD::error << _("AlsaAudioBackend: failed to create process thread.") << endmsg;
937 delete _pcmi; _pcmi = 0;
938 _device_reservation.release_device();
940 return ProcessThreadStartError;
942 PBD::warning << _("AlsaAudioBackend: cannot acquire realtime permissions.") << endmsg;
947 while (!_active && --timeout > 0) { Glib::usleep (1000); }
949 if (timeout == 0 || !_active) {
950 PBD::error << _("AlsaAudioBackend: failed to start process thread.") << endmsg;
951 delete _pcmi; _pcmi = 0;
952 _device_reservation.release_device();
954 return ProcessThreadStartError;
957 _midi_device_thread_active = listen_for_midi_device_changes ();
960 if (NULL != getenv ("ALSAEXT")) {
961 boost::char_separator<char> sep (";");
962 boost::tokenizer<boost::char_separator<char> > devs (std::string(getenv ("ALSAEXT")), sep);
963 BOOST_FOREACH (const std::string& tmp, devs) {
964 std::string dev (tmp);
965 std::string::size_type n = dev.find ('@');
966 unsigned int sr = _samplerate;
967 unsigned int spp = _samples_per_period;
968 unsigned int duplex = 3; // TODO parse 1: play, 2: capt, 3:both
969 if (n != std::string::npos) {
970 std::string opt (dev.substr (n + 1));
971 sr = PBD::atoi (opt);
972 dev = dev.substr (0, n);
973 std::string::size_type n = opt.find ('/');
974 if (n != std::string::npos) {
975 spp = PBD::atoi (opt.substr (n + 1));
978 if (add_slave (dev.c_str(), sr, spp, duplex)) {
979 PBD::info << string_compose (_("ALSA slave '%1' added"), dev) << endmsg;
981 PBD::error << string_compose (_("ALSA failed to add '%1' as slave"), dev) << endmsg;
991 AlsaAudioBackend::stop ()
999 if (pthread_join (_main_thread, &status)) {
1000 PBD::error << _("AlsaAudioBackend: failed to terminate.") << endmsg;
1004 stop_listen_for_midi_device_changes ();
1006 while (!_rmidi_out.empty ()) {
1007 AlsaMidiIO *m = _rmidi_out.back ();
1009 _rmidi_out.pop_back ();
1012 while (!_rmidi_in.empty ()) {
1013 AlsaMidiIO *m = _rmidi_in.back ();
1015 _rmidi_in.pop_back ();
1019 while (!_slaves.empty ()) {
1020 AudioSlave* s = _slaves.back ();
1021 _slaves.pop_back ();
1026 delete _pcmi; _pcmi = 0;
1027 _device_reservation.release_device();
1028 _measure_latency = false;
1030 return (_active == false) ? 0 : -1;
1034 AlsaAudioBackend::freewheel (bool onoff)
1036 _freewheeling = onoff;
1041 AlsaAudioBackend::dsp_load () const
1043 return 100.f * _dsp_load;
1047 AlsaAudioBackend::raw_buffer_size (DataType t)
1050 case DataType::AUDIO:
1051 return _samples_per_period * sizeof(Sample);
1052 case DataType::MIDI:
1053 return _max_buffer_size; // XXX not really limited
1060 AlsaAudioBackend::sample_time ()
1062 return _processed_samples;
1066 AlsaAudioBackend::sample_time_at_cycle_start ()
1068 return _processed_samples;
1072 AlsaAudioBackend::samples_since_cycle_start ()
1074 if (!_active || !_run || _freewheeling || _freewheel) {
1077 if (_last_process_start == 0) {
1081 const int64_t elapsed_time_us = g_get_monotonic_time() - _last_process_start;
1082 return std::max((pframes_t)0, (pframes_t)rint(1e-6 * elapsed_time_us * _samplerate));
1087 AlsaAudioBackend::alsa_process_thread (void *arg)
1089 ThreadData* td = reinterpret_cast<ThreadData*> (arg);
1090 boost::function<void ()> f = td->f;
1097 AlsaAudioBackend::create_process_thread (boost::function<void()> func)
1099 pthread_t thread_id;
1100 pthread_attr_t attr;
1101 size_t stacksize = 100000;
1103 ThreadData* td = new ThreadData (this, func, stacksize);
1105 if (pbd_realtime_pthread_create (PBD_SCHED_FIFO, -22, stacksize,
1106 &thread_id, alsa_process_thread, td)) {
1107 pthread_attr_init (&attr);
1108 pthread_attr_setstacksize (&attr, stacksize);
1109 if (pthread_create (&thread_id, &attr, alsa_process_thread, td)) {
1110 PBD::error << _("AudioEngine: cannot create process thread.") << endmsg;
1111 pthread_attr_destroy (&attr);
1114 pthread_attr_destroy (&attr);
1117 _threads.push_back (thread_id);
1122 AlsaAudioBackend::join_process_threads ()
1126 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
1129 if (pthread_join (*i, &status)) {
1130 PBD::error << _("AudioEngine: cannot terminate process thread.") << endmsg;
1139 AlsaAudioBackend::in_process_thread ()
1141 if (pthread_equal (_main_thread, pthread_self()) != 0) {
1145 for (std::vector<pthread_t>::const_iterator i = _threads.begin (); i != _threads.end (); ++i)
1147 if (pthread_equal (*i, pthread_self ()) != 0) {
1155 AlsaAudioBackend::process_thread_count ()
1157 return _threads.size ();
1161 AlsaAudioBackend::update_latencies ()
1163 // trigger latency callback in RT thread (locked graph)
1164 port_connect_add_remove_callback();
1167 /* PORTENGINE API */
1170 AlsaAudioBackend::private_handle () const
1176 AlsaAudioBackend::my_name () const
1178 return _instance_name;
1182 AlsaAudioBackend::port_name_size () const
1188 AlsaAudioBackend::set_port_name (PortEngine::PortHandle port, const std::string& name)
1190 std::string newname (_instance_name + ":" + name);
1191 if (!valid_port (port)) {
1192 PBD::error << _("AlsaBackend::set_port_name: Invalid Port") << endmsg;
1195 if (find_port (newname)) {
1196 PBD::error << _("AlsaBackend::set_port_name: Port with given name already exists") << endmsg;
1200 AlsaPort* p = static_cast<AlsaPort*>(port);
1201 _portmap.erase (p->name());
1202 _portmap.insert (make_pair (newname, p));
1203 return p->set_name (newname);
1207 AlsaAudioBackend::get_port_name (PortEngine::PortHandle port) const
1209 if (!valid_port (port)) {
1210 PBD::warning << _("AlsaBackend::get_port_name: Invalid Port(s)") << endmsg;
1211 return std::string ();
1213 return static_cast<AlsaPort*>(port)->name ();
1217 AlsaAudioBackend::get_port_flags (PortEngine::PortHandle port) const
1219 if (!valid_port (port)) {
1220 PBD::warning << _("AlsaBackend::get_port_flags: Invalid Port(s)") << endmsg;
1221 return PortFlags (0);
1223 return static_cast<AlsaPort*>(port)->flags ();
1227 AlsaAudioBackend::get_port_property (PortHandle port, const std::string& key, std::string& value, std::string& type) const
1229 if (!valid_port (port)) {
1230 PBD::warning << _("AlsaBackend::get_port_property: Invalid Port(s)") << endmsg;
1233 if (key == "http://jackaudio.org/metadata/pretty-name") {
1235 value = static_cast<AlsaPort*>(port)->pretty_name ();
1236 if (!value.empty()) {
1244 AlsaAudioBackend::set_port_property (PortHandle port, const std::string& key, const std::string& value, const std::string& type)
1246 if (!valid_port (port)) {
1247 PBD::warning << _("AlsaBackend::set_port_property: Invalid Port(s)") << endmsg;
1250 if (key == "http://jackaudio.org/metadata/pretty-name" && type.empty ()) {
1251 static_cast<AlsaPort*>(port)->set_pretty_name (value);
1257 PortEngine::PortHandle
1258 AlsaAudioBackend::get_port_by_name (const std::string& name) const
1260 PortHandle port = (PortHandle) find_port (name);
1265 AlsaAudioBackend::get_ports (
1266 const std::string& port_name_pattern,
1267 DataType type, PortFlags flags,
1268 std::vector<std::string>& port_names) const
1272 bool use_regexp = false;
1273 if (port_name_pattern.size () > 0) {
1274 if (!regcomp (&port_regex, port_name_pattern.c_str (), REG_EXTENDED|REG_NOSUB)) {
1279 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
1280 AlsaPort* port = *i;
1281 if ((port->type () == type) && flags == (port->flags () & flags)) {
1282 if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
1283 port_names.push_back (port->name ());
1289 regfree (&port_regex);
1295 AlsaAudioBackend::port_data_type (PortEngine::PortHandle port) const
1297 if (!valid_port (port)) {
1298 return DataType::NIL;
1300 return static_cast<AlsaPort*>(port)->type ();
1303 PortEngine::PortHandle
1304 AlsaAudioBackend::register_port (
1305 const std::string& name,
1306 ARDOUR::DataType type,
1307 ARDOUR::PortFlags flags)
1309 if (name.size () == 0) { return 0; }
1310 if (flags & IsPhysical) { return 0; }
1311 return add_port (_instance_name + ":" + name, type, flags);
1314 PortEngine::PortHandle
1315 AlsaAudioBackend::add_port (
1316 const std::string& name,
1317 ARDOUR::DataType type,
1318 ARDOUR::PortFlags flags)
1320 assert(name.size ());
1321 if (find_port (name)) {
1322 PBD::error << _("AlsaBackend::register_port: Port already exists:")
1323 << " (" << name << ")" << endmsg;
1326 AlsaPort* port = NULL;
1328 case DataType::AUDIO:
1329 port = new AlsaAudioPort (*this, name, flags);
1331 case DataType::MIDI:
1332 port = new AlsaMidiPort (*this, name, flags);
1335 PBD::error << _("AlsaBackend::register_port: Invalid Data Type.") << endmsg;
1339 _ports.insert (port);
1340 _portmap.insert (make_pair (name, port));
1346 AlsaAudioBackend::unregister_port (PortEngine::PortHandle port_handle)
1351 AlsaPort* port = static_cast<AlsaPort*>(port_handle);
1352 PortIndex::iterator i = std::find (_ports.begin(), _ports.end(), static_cast<AlsaPort*>(port_handle));
1353 if (i == _ports.end ()) {
1354 PBD::error << _("AlsaBackend::unregister_port: Failed to find port") << endmsg;
1357 disconnect_all(port_handle);
1358 _portmap.erase (port->name());
1364 AlsaAudioBackend::register_system_audio_ports()
1368 const int a_ins = _n_inputs;
1369 const int a_out = _n_outputs;
1371 const uint32_t lcpp = (_periods_per_cycle - 2) * _samples_per_period;
1374 lr.min = lr.max = (_systemic_audio_input_latency);
1375 for (int i = 1; i <= a_ins; ++i) {
1377 snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
1378 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1380 set_latency_range (p, false, lr);
1381 AlsaPort *ap = static_cast<AlsaPort*>(p);
1382 //ap->set_pretty_name ("")
1383 _system_inputs.push_back (ap);
1386 lr.min = lr.max = lcpp + (_systemic_audio_output_latency);
1387 for (int i = 1; i <= a_out; ++i) {
1389 snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
1390 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1392 set_latency_range (p, true, lr);
1393 AlsaPort *ap = static_cast<AlsaPort*>(p);
1394 //ap->set_pretty_name ("")
1395 _system_outputs.push_back (ap);
1401 AlsaAudioBackend::auto_update_midi_devices ()
1403 std::map<std::string, std::string> devices;
1404 if (_midi_driver_option == _("ALSA raw devices")) {
1405 get_alsa_rawmidi_device_names (devices);
1406 } else if (_midi_driver_option == _("ALSA sequencer")) {
1407 get_alsa_sequencer_names (devices);
1412 /* find new devices */
1413 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
1414 if (_midi_devices.find (i->first) != _midi_devices.end()) {
1417 _midi_devices[i->first] = new AlsaMidiDeviceInfo (false);
1418 set_midi_device_enabled (i->first, true);
1421 for (std::map<std::string, struct AlsaMidiDeviceInfo*>::iterator i = _midi_devices.begin (); i != _midi_devices.end(); ) {
1422 if (devices.find (i->first) != devices.end()) {
1426 set_midi_device_enabled (i->first, false);
1427 std::map<std::string, struct AlsaMidiDeviceInfo *>::iterator tmp = i;
1429 _midi_devices.erase (i);
1435 AlsaAudioBackend::_midi_device_thread (void* arg)
1437 AlsaAudioBackend* self = static_cast<AlsaAudioBackend*>(arg);
1438 self->midi_device_thread ();
1444 AlsaAudioBackend::midi_device_thread ()
1447 if (snd_seq_open (&seq, "hw", SND_SEQ_OPEN_INPUT, 0) < 0) {
1450 if (snd_seq_set_client_name (seq, "Ardour")) {
1451 snd_seq_close (seq);
1454 if (snd_seq_nonblock (seq, 1) < 0) {
1455 snd_seq_close (seq);
1459 int npfds = snd_seq_poll_descriptors_count (seq, POLLIN);
1461 snd_seq_close (seq);
1465 int port = snd_seq_create_simple_port (seq, "port", SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_NO_EXPORT, SND_SEQ_PORT_TYPE_APPLICATION);
1466 snd_seq_connect_from (seq, port, SND_SEQ_CLIENT_SYSTEM, SND_SEQ_PORT_SYSTEM_ANNOUNCE);
1468 struct pollfd* pfds = (struct pollfd*) malloc (npfds * sizeof(struct pollfd));
1469 snd_seq_poll_descriptors (seq, pfds, npfds, POLLIN);
1470 snd_seq_drop_input (seq);
1472 bool do_poll = true;
1475 int perr = poll (pfds, npfds, 200 /* ms */);
1484 snd_seq_event_t *event;
1485 ssize_t err = snd_seq_event_input (seq, &event);
1486 #if EAGAIN == EWOULDBLOCK
1487 if ((err == -EAGAIN) || (err == -ENOSPC))
1489 if ((err == -EAGAIN) || (err == -EWOULDBLOCK) || (err == -ENOSPC))
1499 assert (event->source.client == SND_SEQ_CLIENT_SYSTEM);
1501 switch (event->type) {
1502 case SND_SEQ_EVENT_PORT_START:
1503 case SND_SEQ_EVENT_PORT_EXIT:
1504 case SND_SEQ_EVENT_PORT_CHANGE:
1505 auto_update_midi_devices ();
1506 engine.request_device_list_update();
1510 do_poll = (0 == err);
1513 snd_seq_delete_simple_port (seq, port);
1514 snd_seq_close (seq);
1518 AlsaAudioBackend::listen_for_midi_device_changes ()
1520 if (pthread_create (&_midi_device_thread_id, NULL, _midi_device_thread, this)) {
1527 AlsaAudioBackend::stop_listen_for_midi_device_changes ()
1529 if (!_midi_device_thread_active) {
1532 pthread_join (_midi_device_thread_id, NULL);
1533 _midi_device_thread_active = false;
1536 /* set playback-latency for _system_inputs
1537 * and capture-latency for _system_outputs
1540 AlsaAudioBackend::update_system_port_latecies ()
1542 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
1543 (*it)->update_connected_latency (true);
1545 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
1546 (*it)->update_connected_latency (false);
1549 pthread_mutex_lock (&_device_port_mutex);
1550 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
1551 (*it)->update_connected_latency (true);
1553 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
1554 (*it)->update_connected_latency (false);
1556 pthread_mutex_unlock (&_device_port_mutex);
1558 for (AudioSlaves::iterator s = _slaves.begin (); s != _slaves.end (); ++s) {
1562 for (std::vector<AlsaPort*>::const_iterator it = (*s)->inputs.begin (); it != (*s)->inputs.end (); ++it) {
1563 (*it)->update_connected_latency (true);
1565 for (std::vector<AlsaPort*>::const_iterator it = (*s)->outputs.begin (); it != (*s)->outputs.end (); ++it) {
1566 (*it)->update_connected_latency (false);
1571 /* libs/ardouralsautil/devicelist.cc appends either of
1572 * " (IO)", " (I)", or " (O)"
1573 * depending of the device is full-duples or half-duplex
1575 static std::string replace_name_io (std::string const& name, bool in)
1577 if (name.empty ()) {
1580 size_t pos = name.find_last_of ('(');
1581 if (pos == std::string::npos) {
1582 assert (0); // this should never happen.
1585 return name.substr (0, pos) + "(" + (in ? "In" : "Out") + ")";
1589 elf_hash (std::string const& s)
1591 const uint8_t* b = (const uint8_t*)s.c_str();
1593 for (size_t i = 0; i < s.length(); ++i) {
1594 h = ( h << 4 ) + b[i];
1595 uint32_t high = h & 0xF0000000;
1605 AlsaAudioBackend::register_system_midi_ports(const std::string device)
1607 std::map<std::string, std::string> devices;
1609 if (_midi_driver_option == get_standard_device_name(DeviceNone)) {
1611 } else if (_midi_driver_option == _("ALSA raw devices")) {
1612 get_alsa_rawmidi_device_names(devices);
1614 get_alsa_sequencer_names (devices);
1617 for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
1618 if (!device.empty() && device != i->first) {
1621 struct AlsaMidiDeviceInfo * nfo = midi_device_info(i->first);
1623 if (!nfo->enabled) continue;
1626 if (_midi_driver_option == _("ALSA raw devices")) {
1627 mout = new AlsaRawMidiOut (i->first, i->second.c_str());
1629 mout = new AlsaSeqMidiOut (i->first, i->second.c_str());
1632 if (mout->state ()) {
1633 PBD::warning << string_compose (
1634 _("AlsaMidiOut: failed to open midi device '%1'."), i->second)
1638 mout->setup_timing(_samples_per_period, _samplerate);
1639 mout->sync_time (g_get_monotonic_time());
1640 if (mout->start ()) {
1641 PBD::warning << string_compose (
1642 _("AlsaMidiOut: failed to start midi device '%1'."), i->second)
1647 snprintf(tmp, sizeof(tmp), "system:midi_playback_%u", elf_hash (i->first));
1648 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
1654 lr.min = lr.max = (nfo->systemic_output_latency);
1655 set_latency_range (p, true, lr);
1656 static_cast<AlsaMidiPort*>(p)->set_n_periods(_periods_per_cycle); // TODO check MIDI alignment
1657 AlsaPort *ap = static_cast<AlsaPort*>(p);
1658 ap->set_pretty_name (replace_name_io (i->first, false));
1659 pthread_mutex_lock (&_device_port_mutex);
1660 _system_midi_out.push_back (ap);
1661 pthread_mutex_unlock (&_device_port_mutex);
1662 _rmidi_out.push_back (mout);
1667 if (_midi_driver_option == _("ALSA raw devices")) {
1668 midin = new AlsaRawMidiIn (i->first, i->second.c_str());
1670 midin = new AlsaSeqMidiIn (i->first, i->second.c_str());
1673 if (midin->state ()) {
1674 PBD::warning << string_compose (
1675 _("AlsaMidiIn: failed to open midi device '%1'."), i->second)
1679 midin->setup_timing(_samples_per_period, _samplerate);
1680 midin->sync_time (g_get_monotonic_time());
1681 if (midin->start ()) {
1682 PBD::warning << string_compose (
1683 _("AlsaMidiIn: failed to start midi device '%1'."), i->second)
1688 snprintf(tmp, sizeof(tmp), "system:midi_capture_%u", elf_hash (i->first));
1689 PortHandle p = add_port(std::string(tmp), DataType::MIDI, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
1696 lr.min = lr.max = (nfo->systemic_input_latency);
1697 set_latency_range (p, false, lr);
1698 AlsaPort *ap = static_cast<AlsaPort*>(p);
1699 ap->set_pretty_name (replace_name_io (i->first, true));
1700 pthread_mutex_lock (&_device_port_mutex);
1701 _system_midi_in.push_back (ap);
1702 pthread_mutex_unlock (&_device_port_mutex);
1703 _rmidi_in.push_back (midin);
1711 AlsaAudioBackend::unregister_ports (bool system_only)
1713 _system_inputs.clear();
1714 _system_outputs.clear();
1715 _system_midi_in.clear();
1716 _system_midi_out.clear();
1718 for (PortIndex::iterator i = _ports.begin (); i != _ports.end ();) {
1719 PortIndex::iterator cur = i++;
1720 AlsaPort* port = *cur;
1721 if (! system_only || (port->is_physical () && port->is_terminal ())) {
1722 port->disconnect_all ();
1723 _portmap.erase (port->name());
1731 AlsaAudioBackend::connect (const std::string& src, const std::string& dst)
1733 AlsaPort* src_port = find_port (src);
1734 AlsaPort* dst_port = find_port (dst);
1737 PBD::error << _("AlsaBackend::connect: Invalid Source port:")
1738 << " (" << src <<")" << endmsg;
1742 PBD::error << _("AlsaBackend::connect: Invalid Destination port:")
1743 << " (" << dst <<")" << endmsg;
1746 return src_port->connect (dst_port);
1750 AlsaAudioBackend::disconnect (const std::string& src, const std::string& dst)
1752 AlsaPort* src_port = find_port (src);
1753 AlsaPort* dst_port = find_port (dst);
1755 if (!src_port || !dst_port) {
1756 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1759 return src_port->disconnect (dst_port);
1763 AlsaAudioBackend::connect (PortEngine::PortHandle src, const std::string& dst)
1765 AlsaPort* dst_port = find_port (dst);
1766 if (!valid_port (src)) {
1767 PBD::error << _("AlsaBackend::connect: Invalid Source Port Handle") << endmsg;
1771 PBD::error << _("AlsaBackend::connect: Invalid Destination Port")
1772 << " (" << dst << ")" << endmsg;
1775 return static_cast<AlsaPort*>(src)->connect (dst_port);
1779 AlsaAudioBackend::disconnect (PortEngine::PortHandle src, const std::string& dst)
1781 AlsaPort* dst_port = find_port (dst);
1782 if (!valid_port (src) || !dst_port) {
1783 PBD::error << _("AlsaBackend::disconnect: Invalid Port(s)") << endmsg;
1786 return static_cast<AlsaPort*>(src)->disconnect (dst_port);
1790 AlsaAudioBackend::disconnect_all (PortEngine::PortHandle port)
1792 if (!valid_port (port)) {
1793 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1796 static_cast<AlsaPort*>(port)->disconnect_all ();
1801 AlsaAudioBackend::connected (PortEngine::PortHandle port, bool /* process_callback_safe*/)
1803 if (!valid_port (port)) {
1804 PBD::error << _("AlsaBackend::disconnect_all: Invalid Port") << endmsg;
1807 return static_cast<AlsaPort*>(port)->is_connected ();
1811 AlsaAudioBackend::connected_to (PortEngine::PortHandle src, const std::string& dst, bool /*process_callback_safe*/)
1813 AlsaPort* dst_port = find_port (dst);
1815 if (!valid_port (src) || !dst_port) {
1816 PBD::error << _("AlsaBackend::connected_to: Invalid Port") << endmsg;
1820 return static_cast<AlsaPort*>(src)->is_connected (dst_port);
1824 AlsaAudioBackend::physically_connected (PortEngine::PortHandle port, bool /*process_callback_safe*/)
1826 if (!valid_port (port)) {
1827 PBD::error << _("AlsaBackend::physically_connected: Invalid Port") << endmsg;
1830 return static_cast<AlsaPort*>(port)->is_physically_connected ();
1834 AlsaAudioBackend::get_connections (PortEngine::PortHandle port, std::vector<std::string>& names, bool /*process_callback_safe*/)
1836 if (!valid_port (port)) {
1837 PBD::error << _("AlsaBackend::get_connections: Invalid Port") << endmsg;
1841 assert (0 == names.size ());
1843 const std::set<AlsaPort*>& connected_ports = static_cast<AlsaPort*>(port)->get_connections ();
1845 for (std::set<AlsaPort*>::const_iterator i = connected_ports.begin (); i != connected_ports.end (); ++i) {
1846 names.push_back ((*i)->name ());
1849 return (int)names.size ();
1854 AlsaAudioBackend::midi_event_get (
1855 pframes_t& timestamp,
1856 size_t& size, uint8_t const** buf, void* port_buffer,
1857 uint32_t event_index)
1859 assert (buf && port_buffer);
1860 AlsaMidiBuffer& source = * static_cast<AlsaMidiBuffer*>(port_buffer);
1861 if (event_index >= source.size ()) {
1864 AlsaMidiEvent const& event = source[event_index];
1866 timestamp = event.timestamp ();
1867 size = event.size ();
1868 *buf = event.data ();
1873 AlsaAudioBackend::midi_event_put (
1875 pframes_t timestamp,
1876 const uint8_t* buffer, size_t size)
1878 assert (buffer && port_buffer);
1879 if (size >= MaxAlsaMidiEventSize) {
1882 AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
1884 if (dst.size () && (pframes_t)dst.back ().timestamp () > timestamp) {
1885 // nevermind, ::get_buffer() sorts events
1886 fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
1887 (pframes_t)dst.back ().timestamp (), timestamp);
1890 dst.push_back (AlsaMidiEvent (timestamp, buffer, size));
1895 AlsaAudioBackend::get_midi_event_count (void* port_buffer)
1897 assert (port_buffer);
1898 return static_cast<AlsaMidiBuffer*>(port_buffer)->size ();
1902 AlsaAudioBackend::midi_clear (void* port_buffer)
1904 assert (port_buffer);
1905 AlsaMidiBuffer * buf = static_cast<AlsaMidiBuffer*>(port_buffer);
1913 AlsaAudioBackend::can_monitor_input () const
1919 AlsaAudioBackend::request_input_monitoring (PortEngine::PortHandle, bool)
1925 AlsaAudioBackend::ensure_input_monitoring (PortEngine::PortHandle, bool)
1931 AlsaAudioBackend::monitoring_input (PortEngine::PortHandle)
1936 /* Latency management */
1939 AlsaAudioBackend::set_latency_range (PortEngine::PortHandle port, bool for_playback, LatencyRange latency_range)
1941 if (!valid_port (port)) {
1942 PBD::error << _("AlsaPort::set_latency_range (): invalid port.") << endmsg;
1944 static_cast<AlsaPort*>(port)->set_latency_range (latency_range, for_playback);
1948 AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
1951 if (!valid_port (port)) {
1952 PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
1957 AlsaPort *p = static_cast<AlsaPort*>(port);
1960 r = p->latency_range (for_playback);
1961 if (p->is_physical() && p->is_terminal()) {
1962 if (p->is_input() && for_playback) {
1963 r.min += _samples_per_period;
1964 r.max += _samples_per_period;
1966 if (p->is_output() && !for_playback) {
1967 r.min += _samples_per_period;
1968 r.max += _samples_per_period;
1974 /* Discovering physical ports */
1977 AlsaAudioBackend::port_is_physical (PortEngine::PortHandle port) const
1979 if (!valid_port (port)) {
1980 PBD::error << _("AlsaPort::port_is_physical (): invalid port.") << endmsg;
1983 return static_cast<AlsaPort*>(port)->is_physical ();
1987 AlsaAudioBackend::get_physical_outputs (DataType type, std::vector<std::string>& port_names)
1989 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
1990 AlsaPort* port = *i;
1991 if ((port->type () == type) && port->is_input () && port->is_physical ()) {
1992 port_names.push_back (port->name ());
1998 AlsaAudioBackend::get_physical_inputs (DataType type, std::vector<std::string>& port_names)
2000 for (PortIndex::iterator i = _ports.begin (); i != _ports.end (); ++i) {
2001 AlsaPort* port = *i;
2002 if ((port->type () == type) && port->is_output () && port->is_physical ()) {
2003 port_names.push_back (port->name ());
2009 AlsaAudioBackend::n_physical_outputs () const
2013 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
2014 AlsaPort* port = *i;
2015 if (port->is_output () && port->is_physical ()) {
2016 switch (port->type ()) {
2017 case DataType::AUDIO: ++n_audio; break;
2018 case DataType::MIDI: ++n_midi; break;
2024 cc.set (DataType::AUDIO, n_audio);
2025 cc.set (DataType::MIDI, n_midi);
2030 AlsaAudioBackend::n_physical_inputs () const
2034 for (PortIndex::const_iterator i = _ports.begin (); i != _ports.end (); ++i) {
2035 AlsaPort* port = *i;
2036 if (port->is_input () && port->is_physical ()) {
2037 switch (port->type ()) {
2038 case DataType::AUDIO: ++n_audio; break;
2039 case DataType::MIDI: ++n_midi; break;
2045 cc.set (DataType::AUDIO, n_audio);
2046 cc.set (DataType::MIDI, n_midi);
2050 /* Getting access to the data buffer for a port */
2053 AlsaAudioBackend::get_buffer (PortEngine::PortHandle port, pframes_t nframes)
2056 assert (valid_port (port));
2057 return static_cast<AlsaPort*>(port)->get_buffer (nframes);
2060 /* Engine Process */
2062 AlsaAudioBackend::main_process_thread ()
2064 AudioEngine::thread_init_callback (this);
2066 bool reset_dll = true;
2067 int last_n_periods = 0;
2068 _processed_samples = 0;
2070 double dll_dt = (double) _samples_per_period / (double) _samplerate;
2071 double dll_w1 = 2 * M_PI * 0.1 * dll_dt;
2072 double dll_w2 = dll_w1 * dll_w1;
2075 _pcmi->pcm_start ();
2076 int no_proc_errors = 0;
2077 const int bailout = 5 * _samplerate / _samples_per_period;
2079 manager.registration_callback();
2080 manager.graph_order_callback();
2082 const double sr_norm = 1e-6 * (double) _samplerate / (double)_samples_per_period;
2087 bool drain_slaves = false;
2089 if (_freewheeling != _freewheel) {
2090 _freewheel = _freewheeling;
2091 engine.freewheel_callback (_freewheel);
2092 for (AudioSlaves::iterator s = _slaves.begin (); s != _slaves.end (); ++s) {
2093 (*s)->freewheel (_freewheel);
2097 _pcmi->pcm_start ();
2098 drain_slaves = true;
2103 nr = _pcmi->pcm_wait ();
2106 uint64_t clock0 = g_get_monotonic_time();
2107 if (reset_dll || last_n_periods != 1) {
2109 drain_slaves = true;
2110 dll_dt = 1e6 * (double) _samples_per_period / (double)_samplerate;
2112 _t1 = clock0 + dll_dt;
2114 const double er = clock0 - _t1;
2116 _t1 = _t1 + dll_w1 * er + dll_dt;
2117 dll_dt += dll_w2 * er;
2120 for (AudioSlaves::iterator s = _slaves.begin (); s != _slaves.end (); ++s) {
2125 /* slave died, unregister its ports (not rt-safe, but no matter) */
2126 PBD::error << _("ALSA Slave device halted") << endmsg;
2127 for (std::vector<AlsaPort*>::const_iterator it = (*s)->inputs.begin (); it != (*s)->inputs.end (); ++it) {
2128 unregister_port (*it);
2130 for (std::vector<AlsaPort*>::const_iterator it = (*s)->outputs.begin (); it != (*s)->outputs.end (); ++it) {
2131 unregister_port (*it);
2133 (*s)->inputs.clear ();
2134 (*s)->outputs.clear ();
2135 (*s)->active = false;
2139 (*s)->active = (*s)->running () && (*s)->state () >= 0;
2140 if (!(*s)->active) {
2143 (*s)->cycle_start (_t0, (_t1 - _t0) * sr_norm, drain_slaves);
2146 if (_pcmi->state () > 0) {
2150 if (_pcmi->state () < 0) {
2151 PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
2154 if (no_proc_errors > bailout) {
2157 _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."),
2164 while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) {
2166 clock1 = g_get_monotonic_time();
2169 _pcmi->capt_init (_samples_per_period);
2170 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it, ++i) {
2171 _pcmi->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
2173 _pcmi->capt_done (_samples_per_period);
2175 for (AudioSlaves::iterator s = _slaves.begin (); s != _slaves.end (); ++s) {
2176 if (!(*s)->active) {
2180 for (std::vector<AlsaPort*>::const_iterator it = (*s)->inputs.begin (); it != (*s)->inputs.end (); ++it, ++i) {
2181 (*s)->capt_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
2185 /* only used when adding/removing MIDI device/system ports */
2186 pthread_mutex_lock (&_device_port_mutex);
2187 /* de-queue incoming midi*/
2189 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
2190 assert (_rmidi_in.size() > i);
2191 AlsaMidiIn *rm = _rmidi_in.at(i);
2192 void *bptr = (*it)->get_buffer(0);
2194 uint8_t data[MaxAlsaMidiEventSize];
2195 size_t size = sizeof(data);
2197 while (rm->recv_event (time, data, size)) {
2198 midi_event_put(bptr, time, data, size);
2199 size = sizeof(data);
2201 rm->sync_time (clock1);
2203 pthread_mutex_unlock (&_device_port_mutex);
2205 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it) {
2206 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
2209 /* call engine process callback */
2210 _last_process_start = g_get_monotonic_time();
2211 if (engine.process_callback (_samples_per_period)) {
2217 /* only used when adding/removing MIDI device/system ports */
2218 pthread_mutex_lock (&_device_port_mutex);
2219 for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
2220 static_cast<AlsaMidiPort*>(*it)->next_period();
2223 /* queue outgoing midi */
2225 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
2226 assert (_rmidi_out.size() > i);
2227 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
2228 AlsaMidiOut *rm = _rmidi_out.at(i);
2229 rm->sync_time (clock1);
2230 for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
2231 rm->send_event (mit->timestamp (), mit->data (), mit->size ());
2234 pthread_mutex_unlock (&_device_port_mutex);
2236 /* write back audio */
2238 _pcmi->play_init (_samples_per_period);
2239 for (std::vector<AlsaPort*>::const_iterator it = _system_outputs.begin (); it != _system_outputs.end (); ++it, ++i) {
2240 _pcmi->play_chan (i, (const float*)(*it)->get_buffer (_samples_per_period), _samples_per_period);
2242 for (; i < _pcmi->nplay (); ++i) {
2243 _pcmi->clear_chan (i, _samples_per_period);
2245 _pcmi->play_done (_samples_per_period);
2247 for (AudioSlaves::iterator s = _slaves.begin (); s != _slaves.end (); ++s) {
2248 if (!(*s)->active) {
2252 for (std::vector<AlsaPort*>::const_iterator it = (*s)->outputs.begin (); it != (*s)->outputs.end (); ++it, ++i) {
2253 (*s)->play_chan (i, (float*)((*it)->get_buffer(_samples_per_period)), _samples_per_period);
2258 nr -= _samples_per_period;
2259 _processed_samples += _samples_per_period;
2261 _dsp_load_calc.set_max_time(_samplerate, _samples_per_period);
2262 _dsp_load_calc.set_start_timestamp_us (clock1);
2263 _dsp_load_calc.set_stop_timestamp_us (g_get_monotonic_time());
2264 _dsp_load = _dsp_load_calc.get_dsp_load ();
2268 if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
2272 fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n",
2273 _pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
2279 // zero audio input buffers
2280 for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
2281 memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
2284 clock1 = g_get_monotonic_time();
2286 pthread_mutex_lock (&_device_port_mutex);
2287 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
2288 static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
2289 AlsaMidiIn *rm = _rmidi_in.at(i);
2290 void *bptr = (*it)->get_buffer(0);
2291 midi_clear(bptr); // zero midi buffer
2293 // TODO add an API call for this.
2295 uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
2296 size_t size = sizeof(data);
2297 while (rm->recv_event (time, data, size)) {
2298 ; // discard midi-data from HW.
2300 rm->sync_time (clock1);
2302 pthread_mutex_unlock (&_device_port_mutex);
2304 _last_process_start = 0;
2305 if (engine.process_callback (_samples_per_period)) {
2311 // drop all outgoing MIDI messages
2312 pthread_mutex_lock (&_device_port_mutex);
2313 for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
2314 void *bptr = (*it)->get_buffer(0);
2317 pthread_mutex_unlock (&_device_port_mutex);
2321 Glib::usleep (100); // don't hog cpu
2324 bool connections_changed = false;
2325 bool ports_changed = false;
2326 if (!pthread_mutex_trylock (&_port_callback_mutex)) {
2327 if (_port_change_flag) {
2328 ports_changed = true;
2329 _port_change_flag = false;
2331 if (!_port_connection_queue.empty ()) {
2332 connections_changed = true;
2334 while (!_port_connection_queue.empty ()) {
2335 PortConnectData *c = _port_connection_queue.back ();
2336 manager.connect_callback (c->a, c->b, c->c);
2337 _port_connection_queue.pop_back ();
2340 pthread_mutex_unlock (&_port_callback_mutex);
2342 if (ports_changed) {
2343 manager.registration_callback();
2345 if (connections_changed) {
2346 manager.graph_order_callback();
2348 if (connections_changed || ports_changed) {
2349 update_system_port_latecies (); // flush, clear
2350 engine.latency_callback(false);
2351 engine.latency_callback(true);
2358 engine.halted_callback("ALSA I/O error.");
2363 /******************************************************************************/
2366 AlsaAudioBackend::add_slave (const char* device,
2367 unsigned int slave_rate,
2368 unsigned int slave_spp,
2369 unsigned int duplex)
2371 AudioSlave* s = new AudioSlave (device, duplex,
2372 _samplerate, _samples_per_period,
2373 slave_rate, slave_spp, 2);
2376 // TODO parse error status
2377 PBD::error << string_compose (_("Failed to create slave device '%1' error %2\n"), device, s->state ()) << endmsg;
2381 for (uint32_t i = 0, n = 1; i < s->ncapt (); ++i) {
2384 snprintf(tmp, sizeof(tmp), "extern:capture_%d", n);
2385 if (find_port (tmp)) {
2391 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsOutput | IsPhysical | IsTerminal));
2392 if (!p) goto errout;
2393 AlsaPort *ap = static_cast<AlsaPort*>(p);
2394 s->inputs.push_back (ap);
2397 for (uint32_t i = 0, n = 1; i < s->nplay (); ++i) {
2400 snprintf(tmp, sizeof(tmp), "extern:playback_%d", n);
2401 if (find_port (tmp)) {
2407 PortHandle p = add_port(std::string(tmp), DataType::AUDIO, static_cast<PortFlags>(IsInput | IsPhysical | IsTerminal));
2408 if (!p) goto errout;
2409 AlsaPort *ap = static_cast<AlsaPort*>(p);
2410 s->outputs.push_back (ap);
2414 PBD::error << string_compose (_("Failed to start slave device '%1'\n"), device) << endmsg;
2417 s->UpdateLatency.connect_same_thread (s->latency_connection, boost::bind (&AlsaAudioBackend::update_latencies, this));
2418 _slaves.push_back (s);
2422 delete s; // releases device
2426 AlsaAudioBackend::AudioSlave::AudioSlave (
2428 unsigned int duplex,
2429 unsigned int master_rate,
2430 unsigned int master_samples_per_period,
2431 unsigned int slave_rate,
2432 unsigned int slave_samples_per_period,
2433 unsigned int periods_per_cycle)
2434 : AlsaDeviceReservation (device)
2436 (duplex & 1) ? device : NULL /* playback */,
2437 (duplex & 2) ? device : NULL /* capture */,
2438 master_rate, master_samples_per_period,
2439 slave_rate, slave_samples_per_period, periods_per_cycle)
2444 Halted.connect_same_thread (_halted_connection, boost::bind (&AudioSlave::halted, this));
2447 AlsaAudioBackend::AudioSlave::~AudioSlave ()
2453 AlsaAudioBackend::AudioSlave::halted ()
2455 // Note: Halted() is emitted from the Slave's process thread.
2461 AlsaAudioBackend::AudioSlave::update_latencies (uint32_t play, uint32_t capt)
2464 lr.min = lr.max = (capt);
2465 for (std::vector<AlsaPort*>::const_iterator it = inputs.begin (); it != inputs.end (); ++it) {
2466 (*it)->set_latency_range (lr, false);
2469 lr.min = lr.max = play;
2470 for (std::vector<AlsaPort*>::const_iterator it = outputs.begin (); it != outputs.end (); ++it) {
2471 (*it)->set_latency_range (lr, true);
2473 printf (" ----- SLAVE LATENCY play=%d capt=%d\n", play, capt); // XXX DEBUG
2474 UpdateLatency (); /* EMIT SIGNAL */
2477 /******************************************************************************/
2479 static boost::shared_ptr<AlsaAudioBackend> _instance;
2481 static boost::shared_ptr<AudioBackend> backend_factory (AudioEngine& e);
2482 static int instantiate (const std::string& arg1, const std::string& /* arg2 */);
2483 static int deinstantiate ();
2484 static bool already_configured ();
2485 static bool available ();
2487 static ARDOUR::AudioBackendInfo _descriptor = {
2496 static boost::shared_ptr<AudioBackend>
2497 backend_factory (AudioEngine& e)
2500 _instance.reset (new AlsaAudioBackend (e, _descriptor));
2506 instantiate (const std::string& arg1, const std::string& /* arg2 */)
2508 s_instance_name = arg1;
2520 already_configured ()
2531 extern "C" ARDOURBACKEND_API ARDOUR::AudioBackendInfo* descriptor ()
2533 return &_descriptor;
2537 /******************************************************************************/
2538 AlsaPort::AlsaPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2543 _capture_latency_range.min = 0;
2544 _capture_latency_range.max = 0;
2545 _playback_latency_range.min = 0;
2546 _playback_latency_range.max = 0;
2549 AlsaPort::~AlsaPort () {
2553 int AlsaPort::connect (AlsaPort *port)
2556 PBD::error << _("AlsaPort::connect (): invalid (null) port") << endmsg;
2560 if (type () != port->type ()) {
2561 PBD::error << _("AlsaPort::connect (): wrong port-type") << endmsg;
2565 if (is_output () && port->is_output ()) {
2566 PBD::error << _("AlsaPort::connect (): cannot inter-connect output ports.") << endmsg;
2570 if (is_input () && port->is_input ()) {
2571 PBD::error << _("AlsaPort::connect (): cannot inter-connect input ports.") << endmsg;
2576 PBD::error << _("AlsaPort::connect (): cannot self-connect ports.") << endmsg;
2580 if (is_connected (port)) {
2581 #if 0 // don't bother to warn about this for now. just ignore it
2582 PBD::error << _("AlsaPort::connect (): ports are already connected:")
2583 << " (" << name () << ") -> (" << port->name () << ")"
2589 _connect (port, true);
2593 void AlsaPort::_connect (AlsaPort *port, bool callback)
2595 _connections.insert (port);
2597 port->_connect (this, false);
2598 _alsa_backend.port_connect_callback (name(), port->name(), true);
2602 int AlsaPort::disconnect (AlsaPort *port)
2605 PBD::error << _("AlsaPort::disconnect (): invalid (null) port") << endmsg;
2609 if (!is_connected (port)) {
2610 PBD::error << _("AlsaPort::disconnect (): ports are not connected:")
2611 << " (" << name () << ") -> (" << port->name () << ")"
2615 _disconnect (port, true);
2619 void AlsaPort::_disconnect (AlsaPort *port, bool callback)
2621 std::set<AlsaPort*>::iterator it = _connections.find (port);
2622 assert (it != _connections.end ());
2623 _connections.erase (it);
2625 port->_disconnect (this, false);
2626 _alsa_backend.port_connect_callback (name(), port->name(), false);
2631 void AlsaPort::disconnect_all ()
2633 while (!_connections.empty ()) {
2634 std::set<AlsaPort*>::iterator it = _connections.begin ();
2635 (*it)->_disconnect (this, false);
2636 _alsa_backend.port_connect_callback (name(), (*it)->name(), false);
2637 _connections.erase (it);
2642 AlsaPort::is_connected (const AlsaPort *port) const
2644 return _connections.find (const_cast<AlsaPort *>(port)) != _connections.end ();
2647 bool AlsaPort::is_physically_connected () const
2649 for (std::set<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
2650 if ((*it)->is_physical ()) {
2658 AlsaPort::set_latency_range (const LatencyRange &latency_range, bool for_playback)
2661 _playback_latency_range = latency_range;
2663 _capture_latency_range = latency_range;
2666 for (std::set<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
2667 if ((*it)->is_physical ()) {
2668 (*it)->update_connected_latency (is_input ());
2674 AlsaPort::update_connected_latency (bool for_playback)
2677 lr.min = lr.max = 0;
2678 for (std::set<AlsaPort*>::const_iterator it = _connections.begin (); it != _connections.end (); ++it) {
2680 l = (*it)->latency_range (for_playback);
2681 lr.min = std::max (lr.min, l.min);
2682 lr.max = std::max (lr.max, l.max);
2684 set_latency_range (lr, for_playback);
2687 /******************************************************************************/
2689 AlsaAudioPort::AlsaAudioPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2690 : AlsaPort (b, name, flags)
2692 memset (_buffer, 0, sizeof (_buffer));
2693 mlock(_buffer, sizeof (_buffer));
2696 AlsaAudioPort::~AlsaAudioPort () { }
2698 void* AlsaAudioPort::get_buffer (pframes_t n_samples)
2701 const std::set<AlsaPort *>& connections = get_connections ();
2702 std::set<AlsaPort*>::const_iterator it = connections.begin ();
2703 if (it == connections.end ()) {
2704 memset (_buffer, 0, n_samples * sizeof (Sample));
2706 AlsaAudioPort const * source = static_cast<const AlsaAudioPort*>(*it);
2707 assert (source && source->is_output ());
2708 memcpy (_buffer, source->const_buffer (), n_samples * sizeof (Sample));
2709 while (++it != connections.end ()) {
2710 source = static_cast<const AlsaAudioPort*>(*it);
2711 assert (source && source->is_output ());
2712 Sample* dst = buffer ();
2713 const Sample* src = source->const_buffer ();
2714 for (uint32_t s = 0; s < n_samples; ++s, ++dst, ++src) {
2724 AlsaMidiPort::AlsaMidiPort (AlsaAudioBackend &b, const std::string& name, PortFlags flags)
2725 : AlsaPort (b, name, flags)
2729 _buffer[0].clear ();
2730 _buffer[1].clear ();
2731 _buffer[2].clear ();
2733 _buffer[0].reserve(256);
2734 _buffer[1].reserve(256);
2735 _buffer[2].reserve(256);
2738 AlsaMidiPort::~AlsaMidiPort () { }
2740 struct MidiEventSorter {
2741 bool operator() (AlsaMidiEvent const& a, AlsaMidiEvent const& b) {
2746 void* AlsaMidiPort::get_buffer (pframes_t /* nframes */)
2749 (_buffer[_bufperiod]).clear ();
2750 const std::set<AlsaPort*>& connections = get_connections ();
2751 for (std::set<AlsaPort*>::const_iterator i = connections.begin ();
2752 i != connections.end ();
2754 const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
2755 for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
2756 (_buffer[_bufperiod]).push_back (*it);
2759 std::stable_sort ((_buffer[_bufperiod]).begin (), (_buffer[_bufperiod]).end (), MidiEventSorter());
2761 return &(_buffer[_bufperiod]);
2764 AlsaMidiEvent::AlsaMidiEvent (const pframes_t timestamp, const uint8_t* data, size_t size)
2766 , _timestamp (timestamp)
2768 if (size > 0 && size < MaxAlsaMidiEventSize) {
2769 memcpy (_data, data, size);
2773 AlsaMidiEvent::AlsaMidiEvent (const AlsaMidiEvent& other)
2774 : _size (other.size ())
2775 , _timestamp (other.timestamp ())
2777 if (other._size > 0) {
2778 assert (other._size < MaxAlsaMidiEventSize);
2779 memcpy (_data, other._data, other._size);
2783 /******************************************************************************/
2785 AlsaDeviceReservation::AlsaDeviceReservation ()
2786 : _device_reservation (0)
2789 AlsaDeviceReservation::AlsaDeviceReservation (const char* device_name)
2790 : _device_reservation (0)
2792 acquire_device (device_name);
2795 AlsaDeviceReservation::~AlsaDeviceReservation ()
2801 AlsaDeviceReservation::acquire_device (const char* device_name)
2803 int device_number = card_to_num(device_name);
2804 if (device_number < 0) return false;
2806 assert(_device_reservation == 0);
2807 _reservation_succeeded = false;
2809 std::string request_device_exe;
2810 if (!PBD::find_file (
2811 PBD::Searchpath(Glib::build_filename(ARDOUR::ardour_dll_directory(), "ardouralsautil")
2812 + G_SEARCHPATH_SEPARATOR_S + ARDOUR::ardour_dll_directory()),
2813 "ardour-request-device", request_device_exe))
2815 PBD::warning << "ardour-request-device binary was not found..'" << endmsg;
2821 argp=(char**) calloc(5,sizeof(char*));
2822 argp[0] = strdup(request_device_exe.c_str());
2823 argp[1] = strdup("-P");
2824 snprintf(tmp, sizeof(tmp), "%d", getpid());
2825 argp[2] = strdup(tmp);
2826 snprintf(tmp, sizeof(tmp), "Audio%d", device_number);
2827 argp[3] = strdup(tmp);
2830 _device_reservation = new ARDOUR::SystemExec(request_device_exe, argp);
2831 _device_reservation->ReadStdout.connect_same_thread (_reservation_connection, boost::bind (&AlsaDeviceReservation::reservation_stdout, this, _1 ,_2));
2832 _device_reservation->Terminated.connect_same_thread (_reservation_connection, boost::bind (&AlsaDeviceReservation::release_device, this));
2834 if (_device_reservation->start (SystemExec::ShareWithParent)) {
2835 PBD::warning << _("AlsaAudioBackend: Device Request failed.") << endmsg;
2840 /* wait to check if reservation suceeded. */
2841 int timeout = 500; // 5 sec
2842 while (_device_reservation && !_reservation_succeeded && --timeout > 0) {
2843 Glib::usleep(10000);
2846 if (timeout == 0 || !_reservation_succeeded) {
2847 PBD::warning << _("AlsaAudioBackend: Device Reservation failed.") << endmsg;
2855 AlsaDeviceReservation::release_device ()
2857 _reservation_connection.drop_connections();
2858 ARDOUR::SystemExec* tmp = _device_reservation;
2859 _device_reservation = 0;
2864 AlsaDeviceReservation::reservation_stdout (std::string d, size_t /* s */)
2866 if (d.substr(0, 19) == "Acquired audio-card") {
2867 _reservation_succeeded = true;