1 /*****************************************************************************
2 * pulse.c : Pulseaudio output plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2008 the VideoLAN team
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
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 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 General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, 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>
35 #include <vlc_pulse.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 * - pause input on policy event
55 * - resample to compensate for long term drift
56 * - select music or video stream property correctly (?)
57 * - set further appropriate stream properties
58 * - update output devices list dynamically
62 * Be careful what you do when the PulseAudio mainloop is held, which is to say
63 * within PulseAudio callbacks, or after vlc_pa_lock().
64 * In particular, a VLC variable callback cannot be triggered nor deleted with
65 * the PulseAudio mainloop lock held, if the callback acquires the lock. */
69 pa_stream *stream; /**< PulseAudio playback stream object */
70 pa_context *context; /**< PulseAudio connection context */
71 pa_volume_t base_volume; /**< 0dB reference volume */
72 pa_cvolume cvolume; /**< actual sink input volume */
73 mtime_t paused; /**< Time when (last) paused */
74 mtime_t pts; /**< Play time of buffer write offset */
75 mtime_t desync; /**< Measured desynchronization */
76 unsigned rate; /**< Current stream sample rate */
79 static void sink_input_info_cb(pa_context *, const pa_sink_input_info *,
83 static void context_cb(pa_context *ctx, pa_subscription_event_type_t type,
84 uint32_t idx, void *userdata)
86 audio_output_t *aout = userdata;
87 aout_sys_t *sys = aout->sys;
90 switch (type & PA_SUBSCRIPTION_EVENT_FACILITY_MASK)
92 case PA_SUBSCRIPTION_EVENT_SINK_INPUT:
93 if (idx != pa_stream_get_index(sys->stream))
94 break; /* only interested in our sink input */
96 /* Gee... PA will not provide the infos directly in the event. */
97 switch (type & PA_SUBSCRIPTION_EVENT_TYPE_MASK)
99 case PA_SUBSCRIPTION_EVENT_REMOVE:
100 msg_Err(aout, "sink input killed!");
104 op = pa_context_get_sink_input_info(ctx, idx, sink_input_info_cb,
106 if (likely(op != NULL))
107 pa_operation_unref(op);
112 default: /* unsubscribed facility?! */
119 static void sink_list_cb(pa_context *c, const pa_sink_info *i, int eol,
122 audio_output_t *aout = userdata;
123 vlc_value_t val, text;
129 msg_Dbg(aout, "listing sink %s (%"PRIu32"): %s", i->name, i->index,
131 val.i_int = i->index;
132 text.psz_string = (char *)i->description;
133 var_Change(aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text);
136 static void sink_info_cb(pa_context *c, const pa_sink_info *i, int eol,
139 audio_output_t *aout = userdata;
140 aout_sys_t *sys = aout->sys;
146 /* PulseAudio flat volume NORM / 100% / 0dB corresponds to no software
147 * amplification and maximum hardware amplification.
148 * VLC maps DEFAULT / 100% to no gain at all (software/hardware).
149 * Thus we need to use the sink base_volume as a multiplier,
150 * if and only if flat volume is active for our current sink. */
151 if (i->flags & PA_SINK_FLAT_VOLUME)
152 sys->base_volume = i->base_volume;
154 sys->base_volume = PA_VOLUME_NORM;
155 msg_Dbg(aout, "base volume: %"PRIu32, sys->base_volume);
159 /*** Latency management and lip synchronization ***/
160 static mtime_t vlc_pa_get_latency(audio_output_t *aout,
161 pa_context *ctx, pa_stream *s)
166 if (pa_stream_get_latency(s, &latency, &negative)) {
167 if (pa_context_errno (ctx) != PA_ERR_NODATA)
168 vlc_pa_error(aout, "unknown latency", ctx);
169 return VLC_TS_INVALID;
171 return negative ? -latency : +latency;
174 static void stream_reset_sync(pa_stream *s, audio_output_t *aout)
176 aout_sys_t *sys = aout->sys;
177 const unsigned rate = aout->format.i_rate;
179 sys->pts = VLC_TS_INVALID;
181 pa_operation *op = pa_stream_update_sample_rate(s, rate, NULL, NULL);
182 if (unlikely(op == NULL))
184 pa_operation_unref(op);
189 * Starts or resumes the playback stream.
190 * Tries start playing back audio samples at the most accurate time
191 * in order to minimize desync and resampling during early playback.
192 * @note PulseAudio lock required.
194 static void stream_resync(audio_output_t *aout, pa_stream *s)
196 aout_sys_t *sys = aout->sys;
200 assert (pa_stream_is_corked(s) > 0);
201 assert (sys->pts != VLC_TS_INVALID);
203 delta = vlc_pa_get_latency(aout, sys->context, s);
204 if (unlikely(delta == VLC_TS_INVALID))
205 delta = 0; /* screwed */
207 delta = (sys->pts - mdate()) - delta;
209 /* TODO: adjust prebuf instead of padding? */
211 size_t nb = (delta * sys->rate) / CLOCK_FREQ;
212 size_t size = aout->format.i_bytes_per_frame;
213 float *zeroes = calloc (nb, size);
215 msg_Dbg(aout, "starting with %zu zeroes (%"PRId64" us)", nb,
217 #if 0 /* Fault injector: add delay */
218 pa_stream_write(s, zeroes, nb * size, NULL, 0, PA_SEEK_RELATIVE);
219 pa_stream_write(s, zeroes, nb * size, NULL, 0, PA_SEEK_RELATIVE);
221 if (likely(zeroes != NULL))
222 if (pa_stream_write(s, zeroes, nb * size, free, 0,
223 PA_SEEK_RELATIVE) < 0)
226 msg_Warn(aout, "starting late (%"PRId64" us)", delta);
228 op = pa_stream_cork(s, 0, NULL, NULL);
230 pa_operation_unref(op);
231 op = pa_stream_trigger(s, NULL, NULL);
233 pa_operation_unref(op);
236 static void stream_latency_cb(pa_stream *s, void *userdata)
238 audio_output_t *aout = userdata;
239 aout_sys_t *sys = aout->sys;
240 mtime_t delta, change;
242 if (pa_stream_is_corked(s))
244 if (sys->pts == VLC_TS_INVALID)
246 msg_Dbg(aout, "missing latency from input");
250 /* Compute lip desynchronization */
251 delta = vlc_pa_get_latency(aout, sys->context, s);
252 if (delta == VLC_TS_INVALID)
255 delta = (sys->pts - mdate()) - delta;
256 change = delta - sys->desync;
258 //msg_Dbg(aout, "desync: %+"PRId64" us (variation: %+"PRId64" us)",
261 const unsigned inrate = aout->format.i_rate;
262 unsigned outrate = sys->rate;
265 if (delta < -AOUT_MAX_PTS_DELAY)
266 msg_Warn(aout, "too late by %"PRId64" us", -delta);
267 else if (delta > +AOUT_MAX_PTS_ADVANCE)
268 msg_Warn(aout, "too early by %"PRId64" us", delta);
269 else if (outrate == inrate)
270 return; /* In sync, do not add unnecessary disturbance! */
274 /* Compute playback sample rate */
275 /* This is empirical (especially the shift values).
276 * Feel free to define something smarter. */
277 int adj = sync ? (outrate - inrate)
278 : outrate * ((delta >> 4) + change) / (CLOCK_FREQ << 2);
279 /* This avoids too quick rate variation. It sounds really bad and
280 * causes unstability (e.g. oscillation around the correct rate). */
281 int limit = inrate >> 10;
282 /* However, to improve stability and try to converge, closing to the
283 * nominal rate is favored over drifting from it. */
284 if ((adj > 0) == (sys->rate > inrate))
292 /* This keeps the effective rate within specified range
293 * (+/-AOUT_MAX_RESAMPLING% - see <vlc_aout.h>) of the nominal rate. */
294 limit = inrate * AOUT_MAX_RESAMPLING / 100;
295 if (outrate > inrate + limit)
296 outrate = inrate + limit;
297 if (outrate < inrate - limit)
298 outrate = inrate - limit;
300 /* Apply adjusted sample rate */
301 if (outrate == sys->rate)
303 pa_operation *op = pa_stream_update_sample_rate(s, outrate, NULL, NULL);
304 if (unlikely(op == NULL)) {
305 vlc_pa_error(aout, "cannot change sample rate", sys->context);
308 pa_operation_unref(op);
309 msg_Dbg(aout, "changed sample rate to %u Hz",outrate);
314 /*** Stream helpers ***/
315 static void stream_state_cb(pa_stream *s, void *userdata)
317 switch (pa_stream_get_state(s)) {
318 case PA_STREAM_READY:
319 case PA_STREAM_FAILED:
320 case PA_STREAM_TERMINATED:
328 static void stream_moved_cb(pa_stream *s, void *userdata)
330 audio_output_t *aout = userdata;
331 aout_sys_t *sys = aout->sys;
333 uint32_t idx = pa_stream_get_device_index(s);
335 msg_Dbg(aout, "connected to sink %"PRIu32": %s", idx,
336 pa_stream_get_device_name(s));
337 op = pa_context_get_sink_info_by_index(sys->context, idx,
339 if (likely(op != NULL))
340 pa_operation_unref(op);
342 /* Update the variable if someone else moved our stream */
343 var_Change(aout, "audio-device", VLC_VAR_SETVALUE,
344 &(vlc_value_t){ .i_int = idx }, NULL);
347 static void stream_overflow_cb(pa_stream *s, void *userdata)
349 audio_output_t *aout = userdata;
351 msg_Err(aout, "overflow");
355 static void stream_started_cb(pa_stream *s, void *userdata)
357 audio_output_t *aout = userdata;
359 msg_Dbg(aout, "started");
363 static void stream_suspended_cb(pa_stream *s, void *userdata)
365 audio_output_t *aout = userdata;
367 msg_Dbg(aout, "suspended");
368 stream_reset_sync(s, aout);
371 static void stream_underflow_cb(pa_stream *s, void *userdata)
373 audio_output_t *aout = userdata;
376 msg_Warn(aout, "underflow");
377 op = pa_stream_cork(s, 1, NULL, NULL);
379 pa_operation_unref(op);
380 stream_reset_sync(s, aout);
383 static int stream_wait(pa_stream *stream)
385 pa_stream_state_t state;
387 while ((state = pa_stream_get_state(stream)) != PA_STREAM_READY) {
388 if (state == PA_STREAM_FAILED || state == PA_STREAM_TERMINATED)
397 static void sink_input_info_cb(pa_context *ctx, const pa_sink_input_info *i,
398 int eol, void *userdata)
400 audio_output_t *aout = userdata;
401 aout_sys_t *sys = aout->sys;
408 sys->cvolume = i->volume;
409 volume = pa_cvolume_max(&i->volume) / (float)PA_VOLUME_NORM;
410 aout_VolumeHardSet(aout, volume, i->mute);
414 /*** VLC audio output callbacks ***/
416 /* Memory free callback. The block_t address is in front of the data. */
417 static void data_free(void *data)
419 block_t **pp = data, *block;
421 memcpy(&block, pp - 1, sizeof (block));
422 block_Release(block);
425 static void *data_convert(block_t **pp)
427 block_t *block = *pp;
428 /* In most cases, there is enough head room, and this is really cheap: */
429 block = block_Realloc(block, sizeof (block), block->i_buffer);
431 if (unlikely(block == NULL))
434 memcpy(block->p_buffer, &block, sizeof (block));
435 block->p_buffer += sizeof (block);
436 block->i_buffer -= sizeof (block);
437 return block->p_buffer;
441 * Queue one audio frame to the playabck stream
443 static void Play(audio_output_t *aout, block_t *block)
445 aout_sys_t *sys = aout->sys;
446 pa_stream *s = sys->stream;
448 const void *ptr = data_convert(&block);
449 if (unlikely(ptr == NULL))
452 size_t len = block->i_buffer;
453 mtime_t pts = block->i_pts + block->i_length;
455 /* Note: The core already holds the output FIFO lock at this point.
456 * Therefore we must not under any circumstances (try to) acquire the
457 * output FIFO lock while the PulseAudio threaded main loop lock is held
458 * (including from PulseAudio stream callbacks). Otherwise lock inversion
459 * will take place, and sooner or later a deadlock. */
463 if (pa_stream_is_corked(s) > 0)
464 stream_resync(aout, s);
466 #if 0 /* Fault injector to test underrun recovery */
467 static volatile unsigned u = 0;
468 if ((++u % 1000) == 0) {
469 msg_Err(aout, "fault injection");
470 pa_operation_unref(pa_stream_flush(s, NULL, NULL));
474 if (pa_stream_write(s, ptr, len, data_free, 0, PA_SEEK_RELATIVE) < 0) {
475 vlc_pa_error(aout, "cannot write", sys->context);
476 block_Release(block);
483 * Cork or uncork the playback stream
485 static void Pause(audio_output_t *aout, bool paused, mtime_t date)
487 aout_sys_t *sys = aout->sys;
488 pa_stream *s = sys->stream;
495 op = pa_stream_cork(s, paused, NULL, NULL);
497 pa_operation_unref(op);
499 assert (sys->paused != VLC_TS_INVALID);
501 msg_Dbg(aout, "resuming after %"PRId64" us", date);
502 sys->paused = VLC_TS_INVALID;
504 stream_resync(aout, s);
511 * Flush or drain the playback stream
513 static void Flush(audio_output_t *aout, bool wait)
515 aout_sys_t *sys = aout->sys;
516 pa_stream *s = sys->stream;
522 op = pa_stream_drain(s, NULL, NULL);
523 /* TODO: wait for drain completion*/
525 op = pa_stream_flush(s, NULL, NULL);
527 pa_operation_unref(op);
531 static int VolumeSet(audio_output_t *aout, float vol, bool mute)
533 aout_sys_t *sys = aout->sys;
535 uint32_t idx = pa_stream_get_index(sys->stream);
537 pa_cvolume cvolume = sys->cvolume;
538 pa_volume_t volume = sys->base_volume;
540 pa_cvolume_scale(&cvolume, PA_VOLUME_NORM); /* preserve balance */
542 /* VLC provides the software volume so convert directly to PulseAudio
543 * software volume, pa_volume_t. This is not a linear amplification factor
544 * so do not use PulseAudio linear amplification! */
545 vol *= PA_VOLUME_NORM;
546 if (unlikely(vol >= PA_VOLUME_MAX))
548 volume = pa_sw_volume_multiply(volume, lround(vol));
549 pa_sw_cvolume_multiply_scalar(&cvolume, &cvolume, volume);
551 assert(pa_cvolume_valid(&cvolume));
554 op = pa_context_set_sink_input_volume(sys->context, idx, &cvolume, NULL, NULL);
555 if (likely(op != NULL))
556 pa_operation_unref(op);
557 op = pa_context_set_sink_input_mute(sys->context, idx, mute, NULL, NULL);
558 if (likely(op != NULL))
559 pa_operation_unref(op);
565 static int StreamMove(vlc_object_t *obj, const char *varname, vlc_value_t old,
566 vlc_value_t val, void *userdata)
568 audio_output_t *aout = (audio_output_t *)obj;
569 aout_sys_t *sys = aout->sys;
570 pa_stream *s = userdata;
572 uint32_t idx = pa_stream_get_index(s);
573 uint32_t sink_idx = val.i_int;
575 (void) varname; (void) old;
578 op = pa_context_move_sink_input_by_index(sys->context, idx, sink_idx,
580 if (likely(op != NULL)) {
581 pa_operation_unref(op);
582 msg_Dbg(aout, "moving to sink %"PRIu32, sink_idx);
584 vlc_pa_error(obj, "cannot move sink", sys->context);
587 return (op != NULL) ? VLC_SUCCESS : VLC_EGENERIC;
592 * Create a PulseAudio playback stream, a.k.a. a sink input.
594 static int Open(vlc_object_t *obj)
596 #if !PA_CHECK_VERSION(0,9,22)
597 if (!vlc_xlib_init(obj))
601 audio_output_t *aout = (audio_output_t *)obj;
604 /* Sample format specification */
605 struct pa_sample_spec ss;
606 vlc_fourcc_t format = aout->format.i_format;
611 format = VLC_CODEC_F32B;
613 ss.format = PA_SAMPLE_FLOAT32BE;
616 format = VLC_CODEC_F32L;
618 ss.format = PA_SAMPLE_FLOAT32LE;
621 format = VLC_CODEC_FL32;
622 ss.format = PA_SAMPLE_FLOAT32NE;
625 ss.format = PA_SAMPLE_S32BE;
628 ss.format = PA_SAMPLE_S32LE;
631 ss.format = PA_SAMPLE_S24BE;
634 ss.format = PA_SAMPLE_S24LE;
637 ss.format = PA_SAMPLE_S16BE;
640 ss.format = PA_SAMPLE_S16LE;
643 format = VLC_CODEC_U8;
645 ss.format = PA_SAMPLE_U8;
650 format = VLC_CODEC_FL32;
651 ss.format = PA_SAMPLE_FLOAT32NE;
655 format = VLC_CODEC_S16N;
656 ss.format = PA_SAMPLE_S16NE;
661 ss.rate = aout->format.i_rate;
662 ss.channels = aout_FormatNbChannels(&aout->format);
663 if (!pa_sample_spec_valid(&ss)) {
664 msg_Err(aout, "unsupported sample specification");
668 /* Channel mapping (order defined in vlc_aout.h) */
669 struct pa_channel_map map;
672 if (aout->format.i_physical_channels & AOUT_CHAN_LEFT)
673 map.map[map.channels++] = PA_CHANNEL_POSITION_FRONT_LEFT;
674 if (aout->format.i_physical_channels & AOUT_CHAN_RIGHT)
675 map.map[map.channels++] = PA_CHANNEL_POSITION_FRONT_RIGHT;
676 if (aout->format.i_physical_channels & AOUT_CHAN_MIDDLELEFT)
677 map.map[map.channels++] = PA_CHANNEL_POSITION_SIDE_LEFT;
678 if (aout->format.i_physical_channels & AOUT_CHAN_MIDDLERIGHT)
679 map.map[map.channels++] = PA_CHANNEL_POSITION_SIDE_RIGHT;
680 if (aout->format.i_physical_channels & AOUT_CHAN_REARLEFT)
681 map.map[map.channels++] = PA_CHANNEL_POSITION_REAR_LEFT;
682 if (aout->format.i_physical_channels & AOUT_CHAN_REARRIGHT)
683 map.map[map.channels++] = PA_CHANNEL_POSITION_REAR_RIGHT;
684 if (aout->format.i_physical_channels & AOUT_CHAN_REARCENTER)
685 map.map[map.channels++] = PA_CHANNEL_POSITION_REAR_CENTER;
686 if (aout->format.i_physical_channels & AOUT_CHAN_CENTER)
688 if (ss.channels == 1)
689 map.map[map.channels++] = PA_CHANNEL_POSITION_MONO;
691 map.map[map.channels++] = PA_CHANNEL_POSITION_FRONT_CENTER;
693 if (aout->format.i_physical_channels & AOUT_CHAN_LFE)
694 map.map[map.channels++] = PA_CHANNEL_POSITION_LFE;
696 for (unsigned i = 0; map.channels < ss.channels; i++) {
697 map.map[map.channels++] = PA_CHANNEL_POSITION_AUX0 + i;
698 msg_Warn(aout, "mapping channel %"PRIu8" to AUX%u", map.channels, i);
701 if (!pa_channel_map_valid(&map)) {
702 msg_Err(aout, "unsupported channel map");
705 const char *name = pa_channel_map_to_name(&map);
706 msg_Dbg(aout, "using %s channel map", (name != NULL) ? name : "?");
709 /* Stream parameters */
710 const pa_stream_flags_t flags = PA_STREAM_START_CORKED
711 //| PA_STREAM_INTERPOLATE_TIMING
712 | PA_STREAM_AUTO_TIMING_UPDATE
713 | PA_STREAM_VARIABLE_RATE;
715 struct pa_buffer_attr attr;
717 /* PulseAudio assumes that tlength bytes are available in the buffer. Thus
718 * we need to be conservative and set the minimum value that the VLC
719 * audio decoder thread warrants. Otherwise, PulseAudio buffers will
720 * underrun on hardware with large buffers. VLC keeps at least
721 * AOUT_MIN_PREPARE and at most AOUT_MAX_PREPARE worth of audio buffers.
722 * TODO? tlength could be adaptively increased to reduce wakeups. */
723 attr.tlength = pa_usec_to_bytes(AOUT_MIN_PREPARE_TIME, &ss);
724 attr.prebuf = 0; /* trigger manually */
726 attr.fragsize = 0; /* not used for output */
728 /* Allocate structures */
729 aout_sys_t *sys = malloc(sizeof(*sys));
730 if (unlikely(sys == NULL))
733 pa_context *ctx = vlc_pa_connect (obj);
743 sys->paused = VLC_TS_INVALID;
744 sys->pts = VLC_TS_INVALID;
749 const pa_subscription_mask_t mask = PA_SUBSCRIPTION_MASK_SINK_INPUT;
751 pa_context_set_subscribe_callback(ctx, context_cb, aout);
752 op = pa_context_subscribe(ctx, mask, NULL, NULL);
753 if (likely(op != NULL))
754 pa_operation_unref(op);
757 sys->base_volume = PA_VOLUME_NORM;
758 pa_cvolume_set(&sys->cvolume, ss.channels, PA_VOLUME_NORM);
761 /* Create a playback stream */
762 pa_stream *s = pa_stream_new(ctx, "audio stream", &ss, &map);
764 vlc_pa_error(obj, "stream creation failure", ctx);
768 pa_stream_set_state_callback(s, stream_state_cb, NULL);
769 pa_stream_set_latency_update_callback(s, stream_latency_cb, aout);
770 pa_stream_set_moved_callback(s, stream_moved_cb, aout);
771 pa_stream_set_overflow_callback(s, stream_overflow_cb, aout);
772 pa_stream_set_started_callback(s, stream_started_cb, aout);
773 pa_stream_set_suspended_callback(s, stream_suspended_cb, aout);
774 pa_stream_set_underflow_callback(s, stream_underflow_cb, aout);
776 if (pa_stream_connect_playback(s, NULL, &attr, flags, NULL, NULL) < 0
778 vlc_pa_error(obj, "stream connection failure", ctx);
782 const struct pa_buffer_attr *pba = pa_stream_get_buffer_attr(s);
783 msg_Dbg(aout, "using buffer metrics: maxlength=%u, tlength=%u, "
784 "prebuf=%u, minreq=%u",
785 pba->maxlength, pba->tlength, pba->prebuf, pba->minreq);
787 var_Create(aout, "audio-device", VLC_VAR_INTEGER|VLC_VAR_HASCHOICE);
788 var_Change(aout, "audio-device", VLC_VAR_SETTEXT,
789 &(vlc_value_t){ .psz_string = (char *)_("Audio device") },
791 var_AddCallback (aout, "audio-device", StreamMove, s);
792 op = pa_context_get_sink_info_list(ctx, sink_list_cb, aout);
793 /* We may need to wait for completion... once LibVLC supports this */
795 pa_operation_unref(op);
796 stream_moved_cb(s, aout);
799 aout->format.i_format = format;
800 aout->pf_play = Play;
801 aout->pf_pause = Pause;
802 aout->pf_flush = Flush;
803 aout_VolumeHardInit (aout, VolumeSet);
813 * Removes a PulseAudio playback stream
815 static void Close (vlc_object_t *obj)
817 audio_output_t *aout = (audio_output_t *)obj;
818 aout_sys_t *sys = aout->sys;
819 pa_context *ctx = sys->context;
820 pa_stream *s = sys->stream;
823 /* The callback takes mainloop lock, so it CANNOT be held here! */
824 var_DelCallback (aout, "audio-device", StreamMove, s);
825 var_Destroy (aout, "audio-device");
828 pa_stream_disconnect(s);
830 /* Clear all callbacks */
831 pa_stream_set_state_callback(s, NULL, NULL);
832 pa_stream_set_latency_update_callback(s, NULL, NULL);
833 pa_stream_set_moved_callback(s, NULL, NULL);
834 pa_stream_set_overflow_callback(s, NULL, NULL);
835 pa_stream_set_started_callback(s, NULL, NULL);
836 pa_stream_set_suspended_callback(s, NULL, NULL);
837 pa_stream_set_underflow_callback(s, NULL, NULL);
843 vlc_pa_disconnect(obj, ctx);