21 #define __STDC_FORMAT_MACROS // For inttypes.h to work in C++
32 #include <sys/types.h>
36 #include "JackAlsaDriver.h"
37 #include "JackEngineControl.h"
38 #include "JackClientControl.h"
40 #include "JackGraphManager.h"
41 #include "JackLockedEngine.h"
42 #include "JackPosixThread.h"
43 #include "JackCompilerDeps.h"
44 #include "JackServerGlobals.h"
49 int JackAlsaDriver::SetBufferSize(jack_nframes_t buffer_size)
51 jack_log(
"JackAlsaDriver::SetBufferSize %ld", buffer_size);
52 int res = alsa_driver_reset_parameters((
alsa_driver_t *)fDriver, buffer_size,
57 JackAudioDriver::SetBufferSize(buffer_size);
62 alsa_driver_reset_parameters((
alsa_driver_t *)fDriver, fEngineControl->fBufferSize,
70 void JackAlsaDriver::UpdateLatencies()
75 for (
int i = 0; i < fCaptureChannels; i++) {
76 range.
min = range.
max = alsa_driver->frames_per_cycle + alsa_driver->capture_frame_latency;
77 fGraphManager->GetPort(fCapturePortList[i])->SetLatencyRange(JackCaptureLatency, &range);
80 for (
int i = 0; i < fPlaybackChannels; i++) {
82 range.
min = range.
max = (alsa_driver->frames_per_cycle * (alsa_driver->user_nperiods - 1)) +
83 ((fEngineControl->fSyncMode) ? 0 : fEngineControl->fBufferSize) + alsa_driver->playback_frame_latency;
84 fGraphManager->GetPort(fPlaybackPortList[i])->SetLatencyRange(JackPlaybackLatency, &range);
86 if (fWithMonitorPorts) {
87 range.
min = range.
max = alsa_driver->frames_per_cycle;
88 fGraphManager->GetPort(fMonitorPortList[i])->SetLatencyRange(JackCaptureLatency, &range);
93 int JackAlsaDriver::Attach()
96 jack_port_id_t port_index;
97 unsigned long port_flags = (
unsigned long)CaptureDriverFlags;
98 char name[REAL_JACK_PORT_NAME_SIZE];
99 char alias[REAL_JACK_PORT_NAME_SIZE];
101 assert(fCaptureChannels < DRIVER_PORT_NUM);
102 assert(fPlaybackChannels < DRIVER_PORT_NUM);
106 if (alsa_driver->has_hw_monitoring)
107 port_flags |= JackPortCanMonitor;
110 JackAudioDriver::SetBufferSize(alsa_driver->frames_per_cycle);
111 JackAudioDriver::SetSampleRate(alsa_driver->frame_rate);
113 jack_log(
"JackAlsaDriver::Attach fBufferSize %ld fSampleRate %ld", fEngineControl->fBufferSize, fEngineControl->fSampleRate);
115 for (
int i = 0; i < fCaptureChannels; i++) {
116 snprintf(alias,
sizeof(alias),
"%s:%s:out%d", fAliasName, fCaptureDriverName, i + 1);
117 snprintf(name,
sizeof(name),
"%s:capture_%d", fClientControl.fName, i + 1);
118 if (fEngine->PortRegister(fClientControl.fRefNum, name, JACK_DEFAULT_AUDIO_TYPE, (JackPortFlags)port_flags, fEngineControl->fBufferSize, &port_index) < 0) {
119 jack_error(
"driver: cannot register port for %s", name);
122 port = fGraphManager->GetPort(port_index);
123 port->SetAlias(alias);
124 fCapturePortList[i] = port_index;
125 jack_log(
"JackAlsaDriver::Attach fCapturePortList[i] %ld ", port_index);
128 port_flags = (
unsigned long)PlaybackDriverFlags;
130 for (
int i = 0; i < fPlaybackChannels; i++) {
131 snprintf(alias,
sizeof(alias),
"%s:%s:in%d", fAliasName, fPlaybackDriverName, i + 1);
132 snprintf(name,
sizeof(name),
"%s:playback_%d", fClientControl.fName, i + 1);
133 if (fEngine->PortRegister(fClientControl.fRefNum, name, JACK_DEFAULT_AUDIO_TYPE, (JackPortFlags)port_flags, fEngineControl->fBufferSize, &port_index) < 0) {
134 jack_error(
"driver: cannot register port for %s", name);
137 port = fGraphManager->GetPort(port_index);
138 port->SetAlias(alias);
139 fPlaybackPortList[i] = port_index;
140 jack_log(
"JackAlsaDriver::Attach fPlaybackPortList[i] %ld ", port_index);
143 if (fWithMonitorPorts) {
145 snprintf(name,
sizeof(name),
"%s:monitor_%d", fClientControl.fName, i + 1);
146 if (fEngine->PortRegister(fClientControl.fRefNum, name, JACK_DEFAULT_AUDIO_TYPE, MonitorDriverFlags, fEngineControl->fBufferSize, &port_index) < 0) {
147 jack_error(
"ALSA: cannot register monitor port for %s", name);
149 fMonitorPortList[i] = port_index;
156 if (alsa_driver->midi) {
157 int err = (alsa_driver->midi->attach)(alsa_driver->midi);
159 jack_error (
"ALSA: cannot attach MIDI: %d", err);
165 int JackAlsaDriver::Detach()
168 if (alsa_driver->midi)
169 (alsa_driver->midi->detach)(alsa_driver->midi);
171 return JackAudioDriver::Detach();
174 extern "C" char* get_control_device_name(
const char * device_name)
183 if (strncasecmp(device_name,
"plughw:", 7) == 0) {
188 comma = strchr(device_name,
',');
190 ctl_name = strdup(device_name);
191 if (ctl_name == NULL) {
192 jack_error(
"strdup(\"%s\") failed.", device_name);
195 ctl_name = strndup(device_name, comma - device_name);
196 if (ctl_name == NULL) {
197 jack_error(
"strndup(\"%s\", %u) failed.", device_name, (
unsigned int)(comma - device_name));
204 static int card_to_num(
const char* device)
208 snd_ctl_card_info_t *card_info;
209 snd_ctl_t* ctl_handle;
212 snd_ctl_card_info_alloca (&card_info);
214 ctl_name = get_control_device_name(device);
215 if (ctl_name == NULL) {
216 jack_error(
"get_control_device_name() failed.");
220 if ((err = snd_ctl_open (&ctl_handle, ctl_name, 0)) < 0) {
221 jack_error (
"control open \"%s\" (%s)", ctl_name,
226 if ((err = snd_ctl_card_info(ctl_handle, card_info)) < 0) {
227 jack_error (
"control hardware info \"%s\" (%s)",
228 device, snd_strerror (err));
232 i = snd_ctl_card_info_get_card(card_info);
235 snd_ctl_close(ctl_handle);
244 int JackAlsaDriver::Open(jack_nframes_t nframes,
245 jack_nframes_t user_nperiods,
246 jack_nframes_t samplerate,
251 DitherAlgorithm dither,
257 const char* capture_driver_name,
258 const char* playback_driver_name,
259 jack_nframes_t capture_latency,
260 jack_nframes_t playback_latency,
261 const char* midi_driver_name)
264 if (JackAudioDriver::Open(nframes, samplerate, capturing, playing,
265 inchannels, outchannels, monitor, capture_driver_name, playback_driver_name,
266 capture_latency, playback_latency) != 0) {
271 if (strcmp(midi_driver_name,
"seq") == 0)
272 midi = alsa_seqmidi_new((jack_client_t*)
this, 0);
273 else if (strcmp(midi_driver_name,
"raw") == 0)
274 midi = alsa_rawmidi_new((jack_client_t*)
this);
276 if (JackServerGlobals::on_device_acquire != NULL) {
277 int capture_card = card_to_num(capture_driver_name);
278 int playback_card = card_to_num(playback_driver_name);
281 if (capture_card >= 0) {
282 snprintf(audio_name,
sizeof(audio_name),
"Audio%d", capture_card);
283 if (!JackServerGlobals::on_device_acquire(audio_name)) {
284 jack_error(
"Audio device %s cannot be acquired...", capture_driver_name);
289 if (playback_card >= 0 && playback_card != capture_card) {
290 snprintf(audio_name,
sizeof(audio_name),
"Audio%d", playback_card);
291 if (!JackServerGlobals::on_device_acquire(audio_name)) {
292 jack_error(
"Audio device %s cannot be acquired...", playback_driver_name);
293 if (capture_card >= 0) {
294 snprintf(audio_name,
sizeof(audio_name),
"Audio%d", capture_card);
295 JackServerGlobals::on_device_release(audio_name);
302 fDriver = alsa_driver_new ((
char*)
"alsa_pcm", (
char*)playback_driver_name, (
char*)capture_driver_name,
322 fCaptureChannels = ((
alsa_driver_t *)fDriver)->capture_nchannels;
323 fPlaybackChannels = ((
alsa_driver_t *)fDriver)->playback_nchannels;
326 JackAudioDriver::Close();
331 int JackAlsaDriver::Close()
334 int res = JackAudioDriver::Close();
338 if (JackServerGlobals::on_device_release != NULL)
341 int capture_card = card_to_num(fCaptureDriverName);
342 if (capture_card >= 0) {
343 snprintf(audio_name,
sizeof(audio_name),
"Audio%d", capture_card);
344 JackServerGlobals::on_device_release(audio_name);
347 int playback_card = card_to_num(fPlaybackDriverName);
348 if (playback_card >= 0 && playback_card != capture_card) {
349 snprintf(audio_name,
sizeof(audio_name),
"Audio%d", playback_card);
350 JackServerGlobals::on_device_release(audio_name);
357 int JackAlsaDriver::Start()
359 int res = JackAudioDriver::Start();
363 JackAudioDriver::Stop();
369 int JackAlsaDriver::Stop()
372 if (JackAudioDriver::Stop() < 0) {
378 int JackAlsaDriver::Read()
382 jack_nframes_t nframes;
387 nframes = alsa_driver_wait((
alsa_driver_t *)fDriver, -1, &wait_status, &fDelayedUsecs);
396 jack_log(
"ALSA XRun wait_status = %d", wait_status);
397 NotifyXRun(fBeginDateUst, fDelayedUsecs);
401 if (nframes != fEngineControl->fBufferSize)
402 jack_log(
"JackAlsaDriver::Read warning fBufferSize = %ld nframes = %ld", fEngineControl->fBufferSize, nframes);
405 JackDriver::CycleIncTime();
407 return alsa_driver_read((
alsa_driver_t *)fDriver, fEngineControl->fBufferSize);
410 int JackAlsaDriver::Write()
412 return alsa_driver_write((
alsa_driver_t *)fDriver, fEngineControl->fBufferSize);
415 void JackAlsaDriver::ReadInputAux(jack_nframes_t orig_nframes, snd_pcm_sframes_t contiguous, snd_pcm_sframes_t nread)
417 for (
int chn = 0; chn < fCaptureChannels; chn++) {
418 if (fGraphManager->GetConnectionsNum(fCapturePortList[chn]) > 0) {
419 jack_default_audio_sample_t* buf = (jack_default_audio_sample_t*)fGraphManager->GetBuffer(fCapturePortList[chn], orig_nframes);
420 alsa_driver_read_from_channel((
alsa_driver_t *)fDriver, chn, buf + nread, contiguous);
425 void JackAlsaDriver::MonitorInputAux()
427 for (
int chn = 0; chn < fCaptureChannels; chn++) {
428 JackPort* port = fGraphManager->GetPort(fCapturePortList[chn]);
429 if (port->MonitoringInput()) {
430 ((
alsa_driver_t *)fDriver)->input_monitor_mask |= (1 << chn);
435 void JackAlsaDriver::ClearOutputAux()
437 for (
int chn = 0; chn < fPlaybackChannels; chn++) {
438 jack_default_audio_sample_t* buf =
439 (jack_default_audio_sample_t*)fGraphManager->GetBuffer(fPlaybackPortList[chn], fEngineControl->fBufferSize);
440 memset(buf, 0,
sizeof (jack_default_audio_sample_t) * fEngineControl->fBufferSize);
444 void JackAlsaDriver::SetTimetAux(jack_time_t time)
446 fBeginDateUst = time;
449 void JackAlsaDriver::WriteOutputAux(jack_nframes_t orig_nframes, snd_pcm_sframes_t contiguous, snd_pcm_sframes_t nwritten)
451 for (
int chn = 0; chn < fPlaybackChannels; chn++) {
453 if (fGraphManager->GetConnectionsNum(fPlaybackPortList[chn]) > 0) {
454 jack_default_audio_sample_t* buf = (jack_default_audio_sample_t*)fGraphManager->GetBuffer(fPlaybackPortList[chn], orig_nframes);
455 alsa_driver_write_to_channel(((
alsa_driver_t *)fDriver), chn, buf + nwritten, contiguous);
457 if (fWithMonitorPorts && fGraphManager->GetConnectionsNum(fMonitorPortList[chn]) > 0) {
458 jack_default_audio_sample_t* monbuf = (jack_default_audio_sample_t*)fGraphManager->GetBuffer(fMonitorPortList[chn], orig_nframes);
459 memcpy(monbuf + nwritten, buf + nwritten, contiguous *
sizeof(jack_default_audio_sample_t));
465 int JackAlsaDriver::is_realtime()
const
467 return fEngineControl->fRealTime;
470 int JackAlsaDriver::create_thread(pthread_t *thread,
int priority,
int realtime,
void *(*start_routine)(
void*),
void *arg)
472 return JackPosixThread::StartImp(thread, priority, realtime, start_routine, arg);
475 jack_port_id_t JackAlsaDriver::port_register(
const char *port_name,
const char *port_type,
unsigned long flags,
unsigned long buffer_size)
477 jack_port_id_t port_index;
478 int res = fEngine->PortRegister(fClientControl.fRefNum, port_name, port_type, flags, buffer_size, &port_index);
479 return (res == 0) ? port_index : 0;
482 int JackAlsaDriver::port_unregister(jack_port_id_t port_index)
484 return fEngine->PortUnRegister(fClientControl.fRefNum, port_index);
487 void* JackAlsaDriver::port_get_buffer(
int port, jack_nframes_t nframes)
489 return fGraphManager->GetBuffer(port, nframes);
492 int JackAlsaDriver::port_set_alias(
int port,
const char* name)
494 return fGraphManager->GetPort(port)->SetAlias(name);
497 jack_nframes_t JackAlsaDriver::get_sample_rate()
const
499 return fEngineControl->fSampleRate;
502 jack_nframes_t JackAlsaDriver::frame_time()
const
505 fEngineControl->ReadFrameTime(&timer);
506 return timer.Time2Frames(GetMicroSeconds(), fEngineControl->fBufferSize);
509 jack_nframes_t JackAlsaDriver::last_frame_time()
const
512 fEngineControl->ReadFrameTime(&timer);
513 return timer.CurFrame();
528 uint32_t * array_size_ptr,
529 const char * device_id,
530 const char * device_description)
536 if (*constraint_ptr_ptr == NULL)
542 if ((*constraint_ptr_ptr)->constraint.enumeration.count == *array_size_ptr)
544 *array_size_ptr += 10;
545 (*constraint_ptr_ptr)->constraint.
enumeration.possible_values_array =
547 (*constraint_ptr_ptr)->constraint.enumeration.possible_values_array,
551 possible_value_ptr = (*constraint_ptr_ptr)->constraint.enumeration.possible_values_array + (*constraint_ptr_ptr)->constraint.enumeration.count;
552 (*constraint_ptr_ptr)->constraint.enumeration.count++;
553 strcpy(possible_value_ptr->value.str, device_id);
554 strcpy(possible_value_ptr->
short_desc, device_description);
562 snd_ctl_card_info_t * info;
563 snd_pcm_info_t * pcminfo_capture;
564 snd_pcm_info_t * pcminfo_playback;
566 char card_id[JACK_DRIVER_PARAM_STRING_MAX + 1];
567 char device_id[JACK_DRIVER_PARAM_STRING_MAX + 1];
568 char description[64];
573 uint32_t array_size = 0;
575 snd_ctl_card_info_alloca(&info);
576 snd_pcm_info_alloca(&pcminfo_capture);
577 snd_pcm_info_alloca(&pcminfo_playback);
579 constraint_ptr = NULL;
581 while(snd_card_next(&card_no) >= 0 && card_no >= 0)
583 snprintf(card_id,
sizeof(card_id),
"hw:%d", card_no);
585 if (snd_ctl_open(&handle, card_id, 0) >= 0 &&
586 snd_ctl_card_info(handle, info) >= 0)
588 snprintf(card_id,
sizeof(card_id),
"hw:%s", snd_ctl_card_info_get_id(info));
589 fill_device(&constraint_ptr, &array_size, card_id, snd_ctl_card_info_get_name(info));
593 while (snd_ctl_pcm_next_device(handle, &device_no) >= 0 && device_no != -1)
595 snprintf(device_id,
sizeof(device_id),
"%s,%d", card_id, device_no);
597 snd_pcm_info_set_device(pcminfo_capture, device_no);
598 snd_pcm_info_set_subdevice(pcminfo_capture, 0);
599 snd_pcm_info_set_stream(pcminfo_capture, SND_PCM_STREAM_CAPTURE);
600 has_capture = snd_ctl_pcm_info(handle, pcminfo_capture) >= 0;
602 snd_pcm_info_set_device(pcminfo_playback, device_no);
603 snd_pcm_info_set_subdevice(pcminfo_playback, 0);
604 snd_pcm_info_set_stream(pcminfo_playback, SND_PCM_STREAM_PLAYBACK);
605 has_playback = snd_ctl_pcm_info(handle, pcminfo_playback) >= 0;
607 if (has_capture && has_playback)
609 snprintf(description,
sizeof(description),
"%s (duplex)", snd_pcm_info_get_name(pcminfo_capture));
611 else if (has_capture)
613 snprintf(description,
sizeof(description),
"%s (capture)", snd_pcm_info_get_name(pcminfo_capture));
615 else if (has_playback)
617 snprintf(description,
sizeof(description),
"%s (playback)", snd_pcm_info_get_name(pcminfo_playback));
624 fill_device(&constraint_ptr, &array_size, device_id, description);
627 snd_ctl_close(handle);
631 return constraint_ptr;
636 get_midi_driver_constraint()
644 constraint_ptr->
flags = JACK_CONSTRAINT_FLAG_STRICT | JACK_CONSTRAINT_FLAG_FAKE_VALUE;
649 possible_value_ptr = constraint_ptr->constraint.
enumeration.possible_values_array;
651 strcpy(possible_value_ptr->value.str,
"none");
652 strcpy(possible_value_ptr->
short_desc,
"no MIDI driver");
654 possible_value_ptr++;
656 strcpy(possible_value_ptr->value.str,
"seq");
657 strcpy(possible_value_ptr->
short_desc,
"ALSA Sequencer driver");
659 possible_value_ptr++;
661 strcpy(possible_value_ptr->value.str,
"raw");
662 strcpy(possible_value_ptr->
short_desc,
"ALSA RawMIDI driver");
664 return constraint_ptr;
669 get_dither_constraint()
677 constraint_ptr->
flags = JACK_CONSTRAINT_FLAG_STRICT | JACK_CONSTRAINT_FLAG_FAKE_VALUE;
682 possible_value_ptr = constraint_ptr->constraint.
enumeration.possible_values_array;
684 possible_value_ptr->value.c =
'n';
685 strcpy(possible_value_ptr->
short_desc,
"none");
687 possible_value_ptr++;
689 possible_value_ptr->value.c =
'r';
690 strcpy(possible_value_ptr->
short_desc,
"rectangular");
692 possible_value_ptr++;
694 possible_value_ptr->value.c =
's';
695 strcpy(possible_value_ptr->
short_desc,
"shaped");
697 possible_value_ptr++;
699 possible_value_ptr->value.c =
't';
700 strcpy(possible_value_ptr->
short_desc,
"triangular");
702 return constraint_ptr;
706 dither_opt (
char c, DitherAlgorithm* dither)
715 *dither = Rectangular;
723 *dither = Triangular;
727 fprintf (stderr,
"ALSA driver: illegal dithering mode %c\n", c);
739 desc = jack_driver_descriptor_construct(
"alsa", JackDriverMaster,
"Linux ALSA API based audio backend", &filler);
741 strcpy(value.str,
"hw:0");
742 jack_driver_descriptor_add_parameter(desc, &filler,
"device",
'd', JackDriverParamString, &value, enum_alsa_devices(),
"ALSA device name", NULL);
744 strcpy(value.str,
"none");
745 jack_driver_descriptor_add_parameter(desc, &filler,
"capture",
'C', JackDriverParamString, &value, NULL,
"Provide capture ports. Optionally set device", NULL);
746 jack_driver_descriptor_add_parameter(desc, &filler,
"playback",
'P', JackDriverParamString, &value, NULL,
"Provide playback ports. Optionally set device", NULL);
749 jack_driver_descriptor_add_parameter(desc, &filler,
"rate",
'r', JackDriverParamUInt, &value, NULL,
"Sample rate", NULL);
752 jack_driver_descriptor_add_parameter(desc, &filler,
"period",
'p', JackDriverParamUInt, &value, NULL,
"Frames per period", NULL);
755 jack_driver_descriptor_add_parameter(desc, &filler,
"nperiods",
'n', JackDriverParamUInt, &value, NULL,
"Number of periods of playback latency", NULL);
758 jack_driver_descriptor_add_parameter(desc, &filler,
"hwmon",
'H', JackDriverParamBool, &value, NULL,
"Hardware monitoring, if available", NULL);
761 jack_driver_descriptor_add_parameter(desc, &filler,
"hwmeter",
'M', JackDriverParamBool, &value, NULL,
"Hardware metering, if available", NULL);
764 jack_driver_descriptor_add_parameter(desc, &filler,
"duplex",
'D', JackDriverParamBool, &value, NULL,
"Provide both capture and playback ports", NULL);
767 jack_driver_descriptor_add_parameter(desc, &filler,
"softmode",
's', JackDriverParamBool, &value, NULL,
"Soft-mode, no xrun handling", NULL);
770 jack_driver_descriptor_add_parameter(desc, &filler,
"monitor",
'm', JackDriverParamBool, &value, NULL,
"Provide monitor ports for the output", NULL);
773 jack_driver_descriptor_add_parameter(
780 get_dither_constraint(),
789 jack_driver_descriptor_add_parameter(desc, &filler,
"inchannels",
'i', JackDriverParamUInt, &value, NULL,
"Number of capture channels (defaults to hardware max)", NULL);
790 jack_driver_descriptor_add_parameter(desc, &filler,
"outchannels",
'o', JackDriverParamUInt, &value, NULL,
"Number of playback channels (defaults to hardware max)", NULL);
793 jack_driver_descriptor_add_parameter(desc, &filler,
"shorts",
'S', JackDriverParamBool, &value, NULL,
"Try 16-bit samples before 32-bit", NULL);
796 jack_driver_descriptor_add_parameter(desc, &filler,
"input-latency",
'I', JackDriverParamUInt, &value, NULL,
"Extra input latency (frames)", NULL);
797 jack_driver_descriptor_add_parameter(desc, &filler,
"output-latency",
'O', JackDriverParamUInt, &value, NULL,
"Extra output latency (frames)", NULL);
799 strcpy(value.str,
"none");
800 jack_driver_descriptor_add_parameter(
805 JackDriverParamString,
807 get_midi_driver_constraint(),
809 "ALSA MIDI driver:\n"
810 " none - no MIDI driver\n"
811 " seq - ALSA Sequencer driver\n"
812 " raw - ALSA RawMIDI driver\n");
821 jack_nframes_t srate = 48000;
822 jack_nframes_t frames_per_interrupt = 1024;
823 unsigned long user_nperiods = 2;
824 const char *playback_pcm_name =
"hw:0";
825 const char *capture_pcm_name =
"hw:0";
826 int hw_monitoring = FALSE;
827 int hw_metering = FALSE;
829 int playback = FALSE;
830 int soft_mode = FALSE;
832 DitherAlgorithm dither = None;
833 int user_capture_nchnls = 0;
834 int user_playback_nchnls = 0;
835 int shorts_first = FALSE;
836 jack_nframes_t systemic_input_latency = 0;
837 jack_nframes_t systemic_output_latency = 0;
840 const char *midi_driver =
"none";
842 for (node = params; node; node = jack_slist_next (node)) {
845 switch (param->character) {
849 if (strcmp (param->value.str,
"none") != 0) {
850 capture_pcm_name = strdup (param->value.str);
851 jack_log(
"capture device %s", capture_pcm_name);
857 if (strcmp (param->value.str,
"none") != 0) {
858 playback_pcm_name = strdup (param->value.str);
859 jack_log(
"playback device %s", playback_pcm_name);
869 if (strcmp (param->value.str,
"none") != 0) {
870 playback_pcm_name = strdup (param->value.str);
871 capture_pcm_name = strdup (param->value.str);
872 jack_log(
"playback device %s", playback_pcm_name);
873 jack_log(
"capture device %s", capture_pcm_name);
878 hw_monitoring = param->value.i;
882 monitor = param->value.i;
886 hw_metering = param->value.i;
890 srate = param->value.ui;
891 jack_log(
"apparent rate = %d", srate);
895 frames_per_interrupt = param->value.ui;
896 jack_log(
"frames per period = %d", frames_per_interrupt);
900 user_nperiods = param->value.ui;
901 if (user_nperiods < 2) {
907 soft_mode = param->value.i;
911 if (dither_opt (param->value.c, &dither)) {
917 user_capture_nchnls = param->value.ui;
921 user_playback_nchnls = param->value.ui;
925 shorts_first = param->value.i;
929 systemic_input_latency = param->value.ui;
933 systemic_output_latency = param->value.ui;
937 midi_driver = strdup(param->value.str);
943 if (!capture && !playback) {
951 if (g_alsa_driver->Open(frames_per_interrupt, user_nperiods, srate, hw_monitoring, hw_metering, capture, playback, dither, soft_mode, monitor,
952 user_capture_nchnls, user_playback_nchnls, shorts_first, capture_pcm_name, playback_pcm_name,
953 systemic_input_latency, systemic_output_latency, midi_driver) == 0) {
954 return threaded_driver;
956 delete threaded_driver;
963 void ReadInput(jack_nframes_t orig_nframes, snd_pcm_sframes_t contiguous, snd_pcm_sframes_t nread)
965 g_alsa_driver->ReadInputAux(orig_nframes, contiguous, nread);
969 g_alsa_driver->MonitorInputAux();
973 g_alsa_driver->ClearOutputAux();
975 void WriteOutput(jack_nframes_t orig_nframes, snd_pcm_sframes_t contiguous, snd_pcm_sframes_t nwritten)
977 g_alsa_driver->WriteOutputAux(orig_nframes, contiguous, nwritten);
979 void SetTime(jack_time_t time)
981 g_alsa_driver->SetTimetAux(time);
987 if ((res = g_alsa_driver->Stop()) == 0) {
988 res = g_alsa_driver->Start();
The base class for threaded drivers using a "decorator" pattern. Threaded drivers are used with block...
Inter process synchronization using using Mach semaphore.
Locked Engine, access to methods is serialized using a mutex.
SERVER_EXPORT void jack_error(const char *fmt,...)
The base interface for drivers clients.
struct jack_driver_param_constraint_desc_t::@0::@2 enumeration
SERVER_EXPORT void jack_log(const char *fmt,...)