1 /*****************************************************************************
2 * pulse.c : Pulseaudio output plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2008 VLC authors and VideoLAN
5 * Copyright (C) 2009-2011 RĂ©mi Denis-Courmont
7 * Authors: Martin Hamrle <hamrle @ post . cz>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
29 #include <vlc_common.h>
30 #include <vlc_plugin.h>
34 #include <pulse/pulseaudio.h>
36 #if !PA_CHECK_VERSION(0,9,22)
37 # include <vlc_xlib.h>
40 static int Open ( vlc_object_t * );
41 static void Close ( vlc_object_t * );
44 set_shortname( "PulseAudio" )
45 set_description( N_("Pulseaudio audio output") )
46 set_capability( "audio output", 160 )
47 set_category( CAT_AUDIO )
48 set_subcategory( SUBCAT_AUDIO_AOUT )
49 add_shortcut( "pulseaudio", "pa" )
50 set_callbacks( Open, Close )
54 * Be careful what you do when the PulseAudio mainloop is held, which is to say
55 * within PulseAudio callbacks, or after pa_threaded_mainloop_lock().
56 * In particular, a VLC variable callback cannot be triggered nor deleted with
57 * the PulseAudio mainloop lock held, if the callback acquires the lock. */
61 pa_stream *stream; /**< PulseAudio playback stream object */
62 pa_context *context; /**< PulseAudio connection context */
63 pa_threaded_mainloop *mainloop; /**< PulseAudio thread */
64 pa_time_event *trigger; /**< Deferred stream trigger */
65 pa_volume_t base_volume; /**< 0dB reference volume */
66 pa_cvolume cvolume; /**< actual sink input volume */
67 mtime_t first_pts; /**< Play time of buffer start */
68 mtime_t paused; /**< Time when (last) paused */
71 static void sink_list_cb(pa_context *, const pa_sink_info *, int, void *);
72 static void sink_input_info_cb(pa_context *, const pa_sink_input_info *,
76 static void context_cb(pa_context *ctx, pa_subscription_event_type_t type,
77 uint32_t idx, void *userdata)
79 audio_output_t *aout = userdata;
80 aout_sys_t *sys = aout->sys;
83 switch (type & PA_SUBSCRIPTION_EVENT_FACILITY_MASK)
85 case PA_SUBSCRIPTION_EVENT_SINK:
86 switch (type & PA_SUBSCRIPTION_EVENT_TYPE_MASK)
88 case PA_SUBSCRIPTION_EVENT_NEW:
89 case PA_SUBSCRIPTION_EVENT_CHANGE:
90 op = pa_context_get_sink_info_by_index(ctx, idx, sink_list_cb, aout);
91 if (likely(op != NULL))
92 pa_operation_unref(op);
95 case PA_SUBSCRIPTION_EVENT_REMOVE:
96 var_Change(aout, "audio-device", VLC_VAR_DELCHOICE,
97 &(vlc_value_t){ .i_int = idx }, NULL);
102 case PA_SUBSCRIPTION_EVENT_SINK_INPUT:
103 if (sys->stream == NULL || idx != pa_stream_get_index(sys->stream))
104 break; /* only interested in our sink input */
106 /* Gee... PA will not provide the infos directly in the event. */
107 switch (type & PA_SUBSCRIPTION_EVENT_TYPE_MASK)
109 case PA_SUBSCRIPTION_EVENT_REMOVE:
110 msg_Err(aout, "sink input killed!");
114 op = pa_context_get_sink_input_info(ctx, idx, sink_input_info_cb,
116 if (likely(op != NULL))
117 pa_operation_unref(op);
122 default: /* unsubscribed facility?! */
129 static void sink_list_cb(pa_context *c, const pa_sink_info *i, int eol,
132 audio_output_t *aout = userdata;
133 aout_sys_t *sys = aout->sys;
134 vlc_value_t val, text;
140 msg_Dbg(aout, "listing sink %s (%"PRIu32"): %s", i->name, i->index,
142 val.i_int = i->index;
143 text.psz_string = (char *)i->description;
144 /* FIXME: There is no way to replace a choice explicitly. */
145 var_Change(aout, "audio-device", VLC_VAR_DELCHOICE, &val, NULL);
146 var_Change(aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text);
147 /* FIXME: var_Change() can change the variable value if we remove the
148 * current value from the choice list, or if we add a choice while there
149 * was none. So force the correct value back. */
150 if (sys->stream != NULL)
152 val.i_int = pa_stream_get_device_index(sys->stream);
153 var_Change(aout, "audio-device", VLC_VAR_SETVALUE, &val, NULL);
157 static void sink_info_cb(pa_context *c, const pa_sink_info *i, int eol,
160 audio_output_t *aout = userdata;
161 aout_sys_t *sys = aout->sys;
167 /* PulseAudio flat volume NORM / 100% / 0dB corresponds to no software
168 * amplification and maximum hardware amplification.
169 * VLC maps DEFAULT / 100% to no gain at all (software/hardware).
170 * Thus we need to use the sink base_volume as a multiplier,
171 * if and only if flat volume is active for our current sink. */
172 if (i->flags & PA_SINK_FLAT_VOLUME)
173 sys->base_volume = i->base_volume;
175 sys->base_volume = PA_VOLUME_NORM;
176 msg_Dbg(aout, "base volume: %"PRIu32, sys->base_volume);
180 /*** Latency management and lip synchronization ***/
181 static void stream_start_now(pa_stream *s, audio_output_t *aout)
183 aout_sys_t *sys = aout->sys;
186 assert (sys->trigger == NULL);
188 op = pa_stream_cork(s, 0, NULL, NULL);
190 pa_operation_unref(op);
191 op = pa_stream_trigger(s, NULL, NULL);
192 if (likely(op != NULL))
193 pa_operation_unref(op);
196 static void stream_stop(pa_stream *s, audio_output_t *aout)
198 aout_sys_t *sys = aout->sys;
201 if (sys->trigger != NULL) {
202 vlc_pa_rttime_free(sys->mainloop, sys->trigger);
206 op = pa_stream_cork(s, 1, NULL, NULL);
208 pa_operation_unref(op);
211 static void stream_trigger_cb(pa_mainloop_api *api, pa_time_event *e,
212 const struct timeval *tv, void *userdata)
214 audio_output_t *aout = userdata;
215 aout_sys_t *sys = aout->sys;
217 assert (sys->trigger == e);
219 msg_Dbg(aout, "starting deferred");
220 vlc_pa_rttime_free(sys->mainloop, sys->trigger);
222 stream_start_now(sys->stream, aout);
223 (void) api; (void) e; (void) tv;
227 * Starts or resumes the playback stream.
228 * Tries start playing back audio samples at the most accurate time
229 * in order to minimize desync and resampling during early playback.
230 * @note PulseAudio lock required.
232 static void stream_start(pa_stream *s, audio_output_t *aout)
234 aout_sys_t *sys = aout->sys;
237 assert (sys->first_pts != VLC_TS_INVALID);
239 if (sys->trigger != NULL) {
240 vlc_pa_rttime_free(sys->mainloop, sys->trigger);
244 delta = vlc_pa_get_latency(aout, sys->context, s);
245 if (unlikely(delta == VLC_TS_INVALID)) {
246 msg_Dbg(aout, "cannot synchronize start");
247 delta = 0; /* screwed */
250 delta = (sys->first_pts - mdate()) - delta;
252 msg_Dbg(aout, "deferring start (%"PRId64" us)", delta);
253 delta += pa_rtclock_now();
254 sys->trigger = pa_context_rttime_new(sys->context, delta,
255 stream_trigger_cb, aout);
257 msg_Warn(aout, "starting late (%"PRId64" us)", delta);
258 stream_start_now(s, aout);
262 static void stream_latency_cb(pa_stream *s, void *userdata)
264 audio_output_t *aout = userdata;
265 aout_sys_t *sys = aout->sys;
267 if (sys->paused != VLC_TS_INVALID)
268 return; /* nothing to do while paused */
269 if (sys->first_pts == VLC_TS_INVALID)
270 return; /* nothing to do if buffers are (still) empty */
271 if (pa_stream_is_corked(s) > 0)
272 stream_start(s, aout);
276 /*** Stream helpers ***/
277 static void stream_state_cb(pa_stream *s, void *userdata)
279 pa_threaded_mainloop *mainloop = userdata;
281 switch (pa_stream_get_state(s)) {
282 case PA_STREAM_READY:
283 case PA_STREAM_FAILED:
284 case PA_STREAM_TERMINATED:
285 pa_threaded_mainloop_signal(mainloop, 0);
291 static void stream_buffer_attr_cb(pa_stream *s, void *userdata)
293 audio_output_t *aout = userdata;
294 const pa_buffer_attr *pba = pa_stream_get_buffer_attr(s);
296 msg_Dbg(aout, "changed buffer metrics: maxlength=%u, tlength=%u, "
297 "prebuf=%u, minreq=%u",
298 pba->maxlength, pba->tlength, pba->prebuf, pba->minreq);
301 static void stream_event_cb(pa_stream *s, const char *name, pa_proplist *pl,
304 audio_output_t *aout = userdata;
306 if (!strcmp(name, PA_STREAM_EVENT_REQUEST_CORK))
307 aout_PolicyReport(aout, true);
309 if (!strcmp(name, PA_STREAM_EVENT_REQUEST_UNCORK))
310 aout_PolicyReport(aout, false);
312 #if PA_CHECK_VERSION(1,0,0)
313 /* FIXME: expose aout_Restart() directly */
314 if (!strcmp(name, PA_STREAM_EVENT_FORMAT_LOST)) {
315 vlc_value_t dummy = { .i_int = 0 };
317 msg_Dbg (aout, "format lost");
318 aout_RestartRequest (aout, AOUT_RESTART_OUTPUT);
321 msg_Warn (aout, "unhandled stream event \"%s\"", name);
326 static void stream_moved_cb(pa_stream *s, void *userdata)
328 audio_output_t *aout = userdata;
329 aout_sys_t *sys = aout->sys;
331 uint32_t idx = pa_stream_get_device_index(s);
333 msg_Dbg(aout, "connected to sink %"PRIu32": %s", idx,
334 pa_stream_get_device_name(s));
335 op = pa_context_get_sink_info_by_index(sys->context, idx,
337 if (likely(op != NULL))
338 pa_operation_unref(op);
340 /* Update the variable if someone else moved our stream */
341 var_Change(aout, "audio-device", VLC_VAR_SETVALUE,
342 &(vlc_value_t){ .i_int = idx }, NULL);
344 /* Sink unknown as yet, create stub choice for it */
345 if (var_GetInteger(aout, "audio-device") != idx)
347 var_Change(aout, "audio-device", VLC_VAR_ADDCHOICE,
348 &(vlc_value_t){ .i_int = idx },
349 &(vlc_value_t){ .psz_string = (char *)"?" });
350 var_Change(aout, "audio-device", VLC_VAR_SETVALUE,
351 &(vlc_value_t){ .i_int = idx }, NULL);
355 static void stream_overflow_cb(pa_stream *s, void *userdata)
357 audio_output_t *aout = userdata;
358 aout_sys_t *sys = aout->sys;
361 msg_Err(aout, "overflow, flushing");
362 op = pa_stream_flush(s, NULL, NULL);
363 if (unlikely(op == NULL))
365 pa_operation_unref(op);
366 sys->first_pts = VLC_TS_INVALID;
369 static void stream_started_cb(pa_stream *s, void *userdata)
371 audio_output_t *aout = userdata;
373 msg_Dbg(aout, "started");
377 static void stream_suspended_cb(pa_stream *s, void *userdata)
379 audio_output_t *aout = userdata;
381 msg_Dbg(aout, "suspended");
385 static void stream_underflow_cb(pa_stream *s, void *userdata)
387 audio_output_t *aout = userdata;
389 msg_Dbg(aout, "underflow");
393 static int stream_wait(pa_stream *stream, pa_threaded_mainloop *mainloop)
395 pa_stream_state_t state;
397 while ((state = pa_stream_get_state(stream)) != PA_STREAM_READY) {
398 if (state == PA_STREAM_FAILED || state == PA_STREAM_TERMINATED)
400 pa_threaded_mainloop_wait(mainloop);
407 static void sink_input_info_cb(pa_context *ctx, const pa_sink_input_info *i,
408 int eol, void *userdata)
410 audio_output_t *aout = userdata;
411 aout_sys_t *sys = aout->sys;
417 sys->cvolume = i->volume; /* cache volume for balance preservation */
419 pa_volume_t volume = pa_cvolume_max(&i->volume);
420 volume = pa_sw_volume_divide(volume, sys->base_volume);
421 aout_VolumeReport(aout, (float)volume / PA_VOLUME_NORM);
422 aout_MuteReport(aout, i->mute);
426 /*** VLC audio output callbacks ***/
428 static int TimeGet(audio_output_t *aout, mtime_t *restrict delay)
430 aout_sys_t *sys = aout->sys;
431 pa_stream *s = sys->stream;
433 if (pa_stream_is_corked(s) > 0)
434 return -1; /* latency is irrelevant if corked */
436 mtime_t delta = vlc_pa_get_latency(aout, sys->context, s);
437 if (delta == VLC_TS_INVALID)
444 /* Memory free callback. The block_t address is in front of the data. */
445 static void data_free(void *data)
447 block_t **pp = data, *block;
449 memcpy(&block, pp - 1, sizeof (block));
450 block_Release(block);
453 static void *data_convert(block_t **pp)
455 block_t *block = *pp;
456 /* In most cases, there is enough head room, and this is really cheap: */
457 block = block_Realloc(block, sizeof (block), block->i_buffer);
459 if (unlikely(block == NULL))
462 memcpy(block->p_buffer, &block, sizeof (block));
463 block->p_buffer += sizeof (block);
464 block->i_buffer -= sizeof (block);
465 return block->p_buffer;
469 * Queue one audio frame to the playback stream
471 static void Play(audio_output_t *aout, block_t *block)
473 aout_sys_t *sys = aout->sys;
474 pa_stream *s = sys->stream;
476 assert (sys->paused == VLC_TS_INVALID);
478 const void *ptr = data_convert(&block);
479 if (unlikely(ptr == NULL))
482 size_t len = block->i_buffer;
484 /* Note: The core already holds the output FIFO lock at this point.
485 * Therefore we must not under any circumstances (try to) acquire the
486 * output FIFO lock while the PulseAudio threaded main loop lock is held
487 * (including from PulseAudio stream callbacks). Otherwise lock inversion
488 * will take place, and sooner or later a deadlock. */
489 pa_threaded_mainloop_lock(sys->mainloop);
491 if (sys->first_pts == VLC_TS_INVALID)
492 sys->first_pts = block->i_pts;
494 if (pa_stream_is_corked(s) > 0)
495 stream_start(s, aout);
497 #if 0 /* Fault injector to test underrun recovery */
498 static volatile unsigned u = 0;
499 if ((++u % 1000) == 0) {
500 msg_Err(aout, "fault injection");
501 pa_operation_unref(pa_stream_flush(s, NULL, NULL));
505 if (pa_stream_write(s, ptr, len, data_free, 0, PA_SEEK_RELATIVE) < 0) {
506 vlc_pa_error(aout, "cannot write", sys->context);
507 block_Release(block);
510 pa_threaded_mainloop_unlock(sys->mainloop);
514 * Cork or uncork the playback stream
516 static void Pause(audio_output_t *aout, bool paused, mtime_t date)
518 aout_sys_t *sys = aout->sys;
519 pa_stream *s = sys->stream;
521 pa_threaded_mainloop_lock(sys->mainloop);
525 stream_stop(s, aout);
527 assert (sys->paused != VLC_TS_INVALID);
529 msg_Dbg(aout, "resuming after %"PRId64" us", date);
530 sys->paused = VLC_TS_INVALID;
532 if (sys->first_pts != VLC_TS_INVALID) {
533 sys->first_pts += date;
534 stream_start(s, aout);
538 pa_threaded_mainloop_unlock(sys->mainloop);
542 * Flush or drain the playback stream
544 static void Flush(audio_output_t *aout, bool wait)
546 aout_sys_t *sys = aout->sys;
547 pa_stream *s = sys->stream;
550 pa_threaded_mainloop_lock(sys->mainloop);
553 op = pa_stream_drain(s, NULL, NULL);
554 /* TODO: wait for drain completion*/
556 op = pa_stream_flush(s, NULL, NULL);
558 pa_operation_unref(op);
559 pa_threaded_mainloop_unlock(sys->mainloop);
562 static int VolumeSet(audio_output_t *aout, float vol)
564 aout_sys_t *sys = aout->sys;
565 if (sys->stream == NULL)
567 msg_Err (aout, "cannot change volume while not playing");
571 /* VLC provides the software volume so convert directly to PulseAudio
572 * software volume, pa_volume_t. This is not a linear amplification factor
573 * so do not use PulseAudio linear amplification! */
574 vol *= PA_VOLUME_NORM;
575 if (unlikely(vol >= PA_VOLUME_MAX))
577 pa_volume_t volume = pa_sw_volume_multiply(lround(vol), sys->base_volume);
579 /* Preserve the balance (VLC does not support it). */
580 pa_cvolume cvolume = sys->cvolume;
581 pa_cvolume_scale(&cvolume, PA_VOLUME_NORM);
582 pa_sw_cvolume_multiply_scalar(&cvolume, &cvolume, volume);
583 assert(pa_cvolume_valid(&cvolume));
586 uint32_t idx = pa_stream_get_index(sys->stream);
587 pa_threaded_mainloop_lock(sys->mainloop);
588 op = pa_context_set_sink_input_volume(sys->context, idx, &cvolume,
590 if (likely(op != NULL))
591 pa_operation_unref(op);
592 pa_threaded_mainloop_unlock(sys->mainloop);
597 static int MuteSet(audio_output_t *aout, bool mute)
599 aout_sys_t *sys = aout->sys;
600 if (sys->stream == NULL)
602 msg_Err (aout, "cannot change volume while not playing");
607 uint32_t idx = pa_stream_get_index(sys->stream);
608 pa_threaded_mainloop_lock(sys->mainloop);
609 op = pa_context_set_sink_input_mute(sys->context, idx, mute, NULL, NULL);
610 if (likely(op != NULL))
611 pa_operation_unref(op);
612 pa_threaded_mainloop_unlock(sys->mainloop);
617 static int StreamMove(vlc_object_t *obj, const char *varname, vlc_value_t old,
618 vlc_value_t val, void *userdata)
620 audio_output_t *aout = (audio_output_t *)obj;
621 aout_sys_t *sys = aout->sys;
622 pa_stream *s = userdata;
624 uint32_t idx = pa_stream_get_index(s);
625 uint32_t sink_idx = val.i_int;
627 (void) varname; (void) old;
629 pa_threaded_mainloop_lock(sys->mainloop);
630 op = pa_context_move_sink_input_by_index(sys->context, idx, sink_idx,
632 if (likely(op != NULL)) {
633 pa_operation_unref(op);
634 msg_Dbg(aout, "moving to sink %"PRIu32, sink_idx);
636 vlc_pa_error(obj, "cannot move sink", sys->context);
637 pa_threaded_mainloop_unlock(sys->mainloop);
639 return (op != NULL) ? VLC_SUCCESS : VLC_EGENERIC;
642 static void Stop(audio_output_t *);
645 * Create a PulseAudio playback stream, a.k.a. a sink input.
647 static int Start(audio_output_t *aout, audio_sample_format_t *restrict fmt)
649 aout_sys_t *sys = aout->sys;
651 /* Sample format specification */
652 struct pa_sample_spec ss;
653 #if PA_CHECK_VERSION(1,0,0)
654 pa_encoding_t encoding = PA_ENCODING_INVALID;
657 switch (fmt->i_format)
660 fmt->i_format = VLC_CODEC_F32B;
662 ss.format = PA_SAMPLE_FLOAT32BE;
665 fmt->i_format = VLC_CODEC_F32L;
667 ss.format = PA_SAMPLE_FLOAT32LE;
670 ss.format = PA_SAMPLE_S32BE;
673 ss.format = PA_SAMPLE_S32LE;
676 ss.format = PA_SAMPLE_S24BE;
679 ss.format = PA_SAMPLE_S24LE;
682 ss.format = PA_SAMPLE_S16BE;
685 ss.format = PA_SAMPLE_S16LE;
688 fmt->i_format = VLC_CODEC_U8;
690 ss.format = PA_SAMPLE_U8;
692 #if PA_CHECK_VERSION(1,0,0)
694 fmt->i_format = VLC_CODEC_SPDIFL;
695 encoding = PA_ENCODING_AC3_IEC61937;
696 ss.format = HAVE_FPU ? PA_SAMPLE_FLOAT32NE : PA_SAMPLE_S16NE;
698 /*case VLC_CODEC_EAC3:
699 fmt->i_format = VLC_CODEC_SPDIFL FIXME;
700 encoding = PA_ENCODING_EAC3_IEC61937;
701 ss.format = HAVE_FPU ? PA_SAMPLE_FLOAT32NE : PA_SAMPLE_S16NE;
704 fmt->i_format = VLC_CODEC_SPDIFL FIXME;
705 encoding = PA_ENCODING_MPEG_IEC61937;
706 ss.format = HAVE_FPU ? PA_SAMPLE_FLOAT32NE : PA_SAMPLE_S16NE;
709 fmt->i_format = VLC_CODEC_SPDIFL;
710 encoding = PA_ENCODING_DTS_IEC61937;
711 ss.format = HAVE_FPU ? PA_SAMPLE_FLOAT32NE : PA_SAMPLE_S16NE;
717 fmt->i_format = VLC_CODEC_FL32;
718 ss.format = PA_SAMPLE_FLOAT32NE;
722 fmt->i_format = VLC_CODEC_S16N;
723 ss.format = PA_SAMPLE_S16NE;
728 ss.rate = fmt->i_rate;
729 ss.channels = aout_FormatNbChannels(fmt);
730 if (!pa_sample_spec_valid(&ss)) {
731 msg_Err(aout, "unsupported sample specification");
735 /* Channel mapping (order defined in vlc_aout.h) */
736 struct pa_channel_map map;
739 if (fmt->i_physical_channels & AOUT_CHAN_LEFT)
740 map.map[map.channels++] = PA_CHANNEL_POSITION_FRONT_LEFT;
741 if (fmt->i_physical_channels & AOUT_CHAN_RIGHT)
742 map.map[map.channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT;
743 if (fmt->i_physical_channels & AOUT_CHAN_MIDDLELEFT)
744 map.map[map.channels++] = PA_CHANNEL_POSITION_SIDE_LEFT;
745 if (fmt->i_physical_channels & AOUT_CHAN_MIDDLERIGHT)
746 map.map[map.channels++] = PA_CHANNEL_POSITION_SIDE_RIGHT;
747 if (fmt->i_physical_channels & AOUT_CHAN_REARLEFT)
748 map.map[map.channels++] = PA_CHANNEL_POSITION_REAR_LEFT;
749 if (fmt->i_physical_channels & AOUT_CHAN_REARRIGHT)
750 map.map[map.channels++] = PA_CHANNEL_POSITION_REAR_RIGHT;
751 if (fmt->i_physical_channels & AOUT_CHAN_REARCENTER)
752 map.map[map.channels++] = PA_CHANNEL_POSITION_REAR_CENTER;
753 if (fmt->i_physical_channels & AOUT_CHAN_CENTER)
755 if (ss.channels == 1)
756 map.map[map.channels++] = PA_CHANNEL_POSITION_MONO;
758 map.map[map.channels++] = PA_CHANNEL_POSITION_FRONT_CENTER;
760 if (fmt->i_physical_channels & AOUT_CHAN_LFE)
761 map.map[map.channels++] = PA_CHANNEL_POSITION_LFE;
763 for (unsigned i = 0; map.channels < ss.channels; i++) {
764 map.map[map.channels++] = PA_CHANNEL_POSITION_AUX0 + i;
765 msg_Warn(aout, "mapping channel %"PRIu8" to AUX%u", map.channels, i);
768 if (!pa_channel_map_valid(&map)) {
769 msg_Err(aout, "unsupported channel map");
772 const char *name = pa_channel_map_to_name(&map);
773 msg_Dbg(aout, "using %s channel map", (name != NULL) ? name : "?");
776 /* Stream parameters */
777 const pa_stream_flags_t flags = PA_STREAM_START_CORKED
778 | PA_STREAM_INTERPOLATE_TIMING
779 | PA_STREAM_NOT_MONOTONIC
780 | PA_STREAM_AUTO_TIMING_UPDATE
781 | PA_STREAM_FIX_RATE;
783 struct pa_buffer_attr attr;
785 /* PulseAudio goes berserk if the target length (tlength) is not
786 * significantly longer than 2 periods (minreq), or when the period length
787 * is unspecified and the target length is short. */
788 attr.tlength = pa_usec_to_bytes(3 * AOUT_MIN_PREPARE_TIME, &ss);
789 attr.prebuf = 0; /* trigger manually */
790 attr.minreq = pa_usec_to_bytes(AOUT_MIN_PREPARE_TIME, &ss);
791 attr.fragsize = 0; /* not used for output */
795 sys->first_pts = VLC_TS_INVALID;
796 sys->paused = VLC_TS_INVALID;
799 sys->base_volume = PA_VOLUME_NORM;
800 pa_cvolume_set(&sys->cvolume, ss.channels, PA_VOLUME_NORM);
802 #if PA_CHECK_VERSION(1,0,0)
803 pa_format_info *formatv[2];
804 unsigned formatc = 0;
806 /* Favor digital pass-through if available*/
807 if (encoding != PA_ENCODING_INVALID) {
808 formatv[formatc] = pa_format_info_new();
809 formatv[formatc]->encoding = encoding;
810 pa_format_info_set_rate(formatv[formatc], ss.rate);
811 pa_format_info_set_channels(formatv[formatc], ss.channels);
812 pa_format_info_set_channel_map(formatv[formatc], &map);
816 /* Fallback to PCM */
817 formatv[formatc] = pa_format_info_new();
818 formatv[formatc]->encoding = PA_ENCODING_PCM;
819 pa_format_info_set_sample_format(formatv[formatc], ss.format);
820 pa_format_info_set_rate(formatv[formatc], ss.rate);
821 pa_format_info_set_channels(formatv[formatc], ss.channels);
822 pa_format_info_set_channel_map(formatv[formatc], &map);
825 /* Create a playback stream */
827 pa_proplist *props = pa_proplist_new();
828 if (likely(props != NULL))
829 /* TODO: set other stream properties */
830 pa_proplist_sets (props, PA_PROP_MEDIA_ROLE, "video");
832 pa_threaded_mainloop_lock(sys->mainloop);
833 s = pa_stream_new_extended(sys->context, "audio stream", formatv, formatc,
835 if (likely(props != NULL))
836 pa_proplist_free(props);
838 for (unsigned i = 0; i < formatc; i++)
839 pa_format_info_free(formatv[i]);
841 pa_threaded_mainloop_lock(sys->mainloop);
842 pa_stream *s = pa_stream_new(sys->context, "audio stream", &ss, &map);
845 pa_threaded_mainloop_unlock(sys->mainloop);
846 vlc_pa_error(aout, "stream creation failure", sys->context);
850 pa_stream_set_state_callback(s, stream_state_cb, sys->mainloop);
851 pa_stream_set_buffer_attr_callback(s, stream_buffer_attr_cb, aout);
852 pa_stream_set_event_callback(s, stream_event_cb, aout);
853 pa_stream_set_latency_update_callback(s, stream_latency_cb, aout);
854 pa_stream_set_moved_callback(s, stream_moved_cb, aout);
855 pa_stream_set_overflow_callback(s, stream_overflow_cb, aout);
856 pa_stream_set_started_callback(s, stream_started_cb, aout);
857 pa_stream_set_suspended_callback(s, stream_suspended_cb, aout);
858 pa_stream_set_underflow_callback(s, stream_underflow_cb, aout);
860 if (pa_stream_connect_playback(s, NULL, &attr, flags, NULL, NULL) < 0
861 || stream_wait(s, sys->mainloop)) {
862 vlc_pa_error(aout, "stream connection failure", sys->context);
866 const struct pa_sample_spec *spec = pa_stream_get_sample_spec(s);
867 #if PA_CHECK_VERSION(1,0,0)
868 if (encoding != PA_ENCODING_INVALID) {
869 const pa_format_info *info = pa_stream_get_format_info(s);
871 assert (info != NULL);
872 if (pa_format_info_is_pcm (info)) {
873 msg_Dbg(aout, "digital pass-through not available");
874 fmt->i_format = HAVE_FPU ? VLC_CODEC_FL32 : VLC_CODEC_S16N;
876 msg_Dbg(aout, "digital pass-through enabled");
882 fmt->i_rate = spec->rate;
884 stream_buffer_attr_cb(s, aout);
885 stream_moved_cb(s, aout);
886 pa_threaded_mainloop_unlock(sys->mainloop);
887 var_AddCallback (aout, "audio-device", StreamMove, s);
892 pa_threaded_mainloop_unlock(sys->mainloop);
893 var_AddCallback (aout, "audio-device", StreamMove, s);
899 * Removes a PulseAudio playback stream
901 static void Stop(audio_output_t *aout)
903 aout_sys_t *sys = aout->sys;
904 pa_stream *s = sys->stream;
906 /* The callback takes mainloop lock, so it CANNOT be held here! */
907 var_DelCallback (aout, "audio-device", StreamMove, s);
909 pa_threaded_mainloop_lock(sys->mainloop);
910 if (unlikely(sys->trigger != NULL))
911 vlc_pa_rttime_free(sys->mainloop, sys->trigger);
912 pa_stream_disconnect(s);
914 /* Clear all callbacks */
915 pa_stream_set_state_callback(s, NULL, NULL);
916 pa_stream_set_buffer_attr_callback(s, NULL, NULL);
917 pa_stream_set_event_callback(s, NULL, NULL);
918 pa_stream_set_latency_update_callback(s, NULL, NULL);
919 pa_stream_set_moved_callback(s, NULL, NULL);
920 pa_stream_set_overflow_callback(s, NULL, NULL);
921 pa_stream_set_started_callback(s, NULL, NULL);
922 pa_stream_set_suspended_callback(s, NULL, NULL);
923 pa_stream_set_underflow_callback(s, NULL, NULL);
927 pa_threaded_mainloop_unlock(sys->mainloop);
930 static int Open(vlc_object_t *obj)
932 audio_output_t *aout = (audio_output_t *)obj;
933 aout_sys_t *sys = malloc(sizeof (*sys));
936 #if !PA_CHECK_VERSION(0,9,22)
937 if (!vlc_xlib_init(obj))
940 if (unlikely(sys == NULL))
943 /* Allocate structures */
944 pa_context *ctx = vlc_pa_connect(obj, &sys->mainloop);
956 aout->time_get = TimeGet;
960 aout->volume_set = VolumeSet;
961 aout->mute_set = MuteSet;
963 /* Devices (sinks) */
964 var_Create(aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE);
965 var_Change(aout, "audio-device", VLC_VAR_SETTEXT,
966 &(vlc_value_t){ .psz_string = (char *)_("Audio device") },
969 pa_threaded_mainloop_lock(sys->mainloop);
970 op = pa_context_get_sink_info_list(sys->context, sink_list_cb, aout);
972 pa_operation_unref(op);
975 const pa_subscription_mask_t mask = PA_SUBSCRIPTION_MASK_SINK
976 | PA_SUBSCRIPTION_MASK_SINK_INPUT;
977 pa_context_set_subscribe_callback(sys->context, context_cb, aout);
978 op = pa_context_subscribe(sys->context, mask, NULL, NULL);
979 if (likely(op != NULL))
980 pa_operation_unref(op);
981 pa_threaded_mainloop_unlock(sys->mainloop);
986 static void Close(vlc_object_t *obj)
988 audio_output_t *aout = (audio_output_t *)obj;
989 aout_sys_t *sys = aout->sys;
990 pa_context *ctx = sys->context;
992 pa_threaded_mainloop_lock(sys->mainloop);
993 pa_context_set_subscribe_callback(sys->context, NULL, NULL);
994 pa_threaded_mainloop_unlock(sys->mainloop);
995 vlc_pa_disconnect(obj, ctx, sys->mainloop);
997 var_Destroy (aout, "audio-device");