2 This file is part of PulseAudio.
4 Copyright 2004-2006 Lennart Poettering
5 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
7 PulseAudio is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published
9 by the Free Software Foundation; either version 2.1 of the License,
10 or (at your option) any later version.
12 PulseAudio is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with PulseAudio; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 #include <pulse/format.h>
31 #include <pulse/utf8.h>
32 #include <pulse/xmalloc.h>
33 #include <pulse/timeval.h>
34 #include <pulse/util.h>
35 #include <pulse/rtclock.h>
36 #include <pulse/internal.h>
38 #include <pulsecore/core-util.h>
39 #include <pulsecore/source-output.h>
40 #include <pulsecore/namereg.h>
41 #include <pulsecore/core-subscribe.h>
42 #include <pulsecore/log.h>
43 #include <pulsecore/mix.h>
44 #include <pulsecore/flist.h>
48 #define ABSOLUTE_MIN_LATENCY (500)
49 #define ABSOLUTE_MAX_LATENCY (10*PA_USEC_PER_SEC)
50 #define DEFAULT_FIXED_LATENCY (250*PA_USEC_PER_MSEC)
52 PA_DEFINE_PUBLIC_CLASS(pa_source, pa_msgobject);
54 struct pa_source_volume_change {
58 PA_LLIST_FIELDS(pa_source_volume_change);
61 struct source_message_set_port {
66 static void source_free(pa_object *o);
68 static void pa_source_volume_change_push(pa_source *s);
69 static void pa_source_volume_change_flush(pa_source *s);
71 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data) {
75 data->proplist = pa_proplist_new();
76 data->ports = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func, NULL, (pa_free_cb_t) pa_device_port_unref);
81 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name) {
85 data->name = pa_xstrdup(name);
88 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec) {
91 if ((data->sample_spec_is_set = !!spec))
92 data->sample_spec = *spec;
95 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map) {
98 if ((data->channel_map_is_set = !!map))
99 data->channel_map = *map;
102 void pa_source_new_data_set_alternate_sample_rate(pa_source_new_data *data, const uint32_t alternate_sample_rate) {
105 data->alternate_sample_rate_is_set = true;
106 data->alternate_sample_rate = alternate_sample_rate;
109 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume) {
112 if ((data->volume_is_set = !!volume))
113 data->volume = *volume;
116 void pa_source_new_data_set_muted(pa_source_new_data *data, bool mute) {
119 data->muted_is_set = true;
120 data->muted = !!mute;
123 void pa_source_new_data_set_port(pa_source_new_data *data, const char *port) {
126 pa_xfree(data->active_port);
127 data->active_port = pa_xstrdup(port);
130 void pa_source_new_data_done(pa_source_new_data *data) {
133 pa_proplist_free(data->proplist);
136 pa_hashmap_free(data->ports);
138 pa_xfree(data->name);
139 pa_xfree(data->active_port);
142 /* Called from main context */
143 static void reset_callbacks(pa_source *s) {
147 s->get_volume = NULL;
148 s->set_volume = NULL;
149 s->write_volume = NULL;
152 s->update_requested_latency = NULL;
154 s->get_formats = NULL;
155 s->update_rate = NULL;
158 /* Called from main context */
159 pa_source* pa_source_new(
161 pa_source_new_data *data,
162 pa_source_flags_t flags) {
166 char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
171 pa_assert(data->name);
172 pa_assert_ctl_context();
174 s = pa_msgobject_new(pa_source);
176 if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) {
177 pa_log_debug("Failed to register name %s.", data->name);
182 pa_source_new_data_set_name(data, name);
184 if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0) {
186 pa_namereg_unregister(core, name);
190 /* FIXME, need to free s here on failure */
192 pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
193 pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
195 pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec));
197 if (!data->channel_map_is_set)
198 pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
200 pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
201 pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
203 /* FIXME: There should probably be a general function for checking whether
204 * the source volume is allowed to be set, like there is for source outputs. */
205 pa_assert(!data->volume_is_set || !(flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
207 if (!data->volume_is_set) {
208 pa_cvolume_reset(&data->volume, data->sample_spec.channels);
209 data->save_volume = false;
212 pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
213 pa_return_null_if_fail(pa_cvolume_compatible(&data->volume, &data->sample_spec));
215 if (!data->muted_is_set)
219 pa_proplist_update(data->proplist, PA_UPDATE_MERGE, data->card->proplist);
221 pa_device_init_description(data->proplist, data->card);
222 pa_device_init_icon(data->proplist, false);
223 pa_device_init_intended_roles(data->proplist);
225 if (!data->active_port) {
226 pa_device_port *p = pa_device_port_find_best(data->ports);
228 pa_source_new_data_set_port(data, p->name);
231 if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0) {
233 pa_namereg_unregister(core, name);
237 s->parent.parent.free = source_free;
238 s->parent.process_msg = pa_source_process_msg;
241 s->state = PA_SOURCE_INIT;
244 s->suspend_cause = data->suspend_cause;
245 pa_source_set_mixer_dirty(s, false);
246 s->name = pa_xstrdup(name);
247 s->proplist = pa_proplist_copy(data->proplist);
248 s->driver = pa_xstrdup(pa_path_get_filename(data->driver));
249 s->module = data->module;
250 s->card = data->card;
252 s->priority = pa_device_init_priority(s->proplist);
254 s->sample_spec = data->sample_spec;
255 s->channel_map = data->channel_map;
256 s->default_sample_rate = s->sample_spec.rate;
258 if (data->alternate_sample_rate_is_set)
259 s->alternate_sample_rate = data->alternate_sample_rate;
261 s->alternate_sample_rate = s->core->alternate_sample_rate;
263 if (s->sample_spec.rate == s->alternate_sample_rate) {
264 pa_log_warn("Default and alternate sample rates are the same.");
265 s->alternate_sample_rate = 0;
268 s->outputs = pa_idxset_new(NULL, NULL);
270 s->monitor_of = NULL;
271 s->output_from_master = NULL;
273 s->reference_volume = s->real_volume = data->volume;
274 pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
275 s->base_volume = PA_VOLUME_NORM;
276 s->n_volume_steps = PA_VOLUME_NORM+1;
277 s->muted = data->muted;
278 s->refresh_volume = s->refresh_muted = false;
285 /* As a minor optimization we just steal the list instead of
287 s->ports = data->ports;
290 s->active_port = NULL;
291 s->save_port = false;
293 if (data->active_port)
294 if ((s->active_port = pa_hashmap_get(s->ports, data->active_port)))
295 s->save_port = data->save_port;
297 /* Hopefully the active port has already been assigned in the previous call
298 to pa_device_port_find_best, but better safe than sorry */
300 s->active_port = pa_device_port_find_best(s->ports);
303 s->latency_offset = s->active_port->latency_offset;
305 s->latency_offset = 0;
307 s->save_volume = data->save_volume;
308 s->save_muted = data->save_muted;
310 pa_silence_memchunk_get(
311 &core->silence_cache,
317 s->thread_info.rtpoll = NULL;
318 s->thread_info.outputs = pa_hashmap_new_full(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func, NULL,
319 (pa_free_cb_t) pa_source_output_unref);
320 s->thread_info.soft_volume = s->soft_volume;
321 s->thread_info.soft_muted = s->muted;
322 s->thread_info.state = s->state;
323 s->thread_info.max_rewind = 0;
324 s->thread_info.requested_latency_valid = false;
325 s->thread_info.requested_latency = 0;
326 s->thread_info.min_latency = ABSOLUTE_MIN_LATENCY;
327 s->thread_info.max_latency = ABSOLUTE_MAX_LATENCY;
328 s->thread_info.fixed_latency = flags & PA_SOURCE_DYNAMIC_LATENCY ? 0 : DEFAULT_FIXED_LATENCY;
330 PA_LLIST_HEAD_INIT(pa_source_volume_change, s->thread_info.volume_changes);
331 s->thread_info.volume_changes_tail = NULL;
332 pa_sw_cvolume_multiply(&s->thread_info.current_hw_volume, &s->soft_volume, &s->real_volume);
333 s->thread_info.volume_change_safety_margin = core->deferred_volume_safety_margin_usec;
334 s->thread_info.volume_change_extra_delay = core->deferred_volume_extra_delay_usec;
335 s->thread_info.latency_offset = s->latency_offset;
337 /* FIXME: This should probably be moved to pa_source_put() */
338 pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
341 pa_assert_se(pa_idxset_put(s->card->sources, s, NULL) >= 0);
343 pt = pa_proplist_to_string_sep(s->proplist, "\n ");
344 pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s\n %s",
347 pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
348 pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map),
355 /* Called from main context */
356 static int source_set_state(pa_source *s, pa_source_state_t state) {
359 pa_source_state_t original_state;
362 pa_assert_ctl_context();
364 if (s->state == state)
367 original_state = s->state;
370 (original_state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(state)) ||
371 (PA_SOURCE_IS_OPENED(original_state) && state == PA_SOURCE_SUSPENDED);
374 if ((ret = s->set_state(s, state)) < 0)
378 if ((ret = pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL)) < 0) {
381 s->set_state(s, original_state);
388 if (state != PA_SOURCE_UNLINKED) { /* if we enter UNLINKED state pa_source_unlink() will fire the appropriate events */
389 pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
390 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
393 if (suspend_change) {
397 /* We're suspending or resuming, tell everyone about it */
399 PA_IDXSET_FOREACH(o, s->outputs, idx)
400 if (s->state == PA_SOURCE_SUSPENDED &&
401 (o->flags & PA_SOURCE_OUTPUT_KILL_ON_SUSPEND))
402 pa_source_output_kill(o);
404 o->suspend(o, state == PA_SOURCE_SUSPENDED);
410 void pa_source_set_get_volume_callback(pa_source *s, pa_source_cb_t cb) {
416 void pa_source_set_set_volume_callback(pa_source *s, pa_source_cb_t cb) {
417 pa_source_flags_t flags;
420 pa_assert(!s->write_volume || cb);
424 /* Save the current flags so we can tell if they've changed */
428 /* The source implementor is responsible for setting decibel volume support */
429 s->flags |= PA_SOURCE_HW_VOLUME_CTRL;
431 s->flags &= ~PA_SOURCE_HW_VOLUME_CTRL;
432 /* See note below in pa_source_put() about volume sharing and decibel volumes */
433 pa_source_enable_decibel_volume(s, !(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
436 /* If the flags have changed after init, let any clients know via a change event */
437 if (s->state != PA_SOURCE_INIT && flags != s->flags)
438 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
441 void pa_source_set_write_volume_callback(pa_source *s, pa_source_cb_t cb) {
442 pa_source_flags_t flags;
445 pa_assert(!cb || s->set_volume);
447 s->write_volume = cb;
449 /* Save the current flags so we can tell if they've changed */
453 s->flags |= PA_SOURCE_DEFERRED_VOLUME;
455 s->flags &= ~PA_SOURCE_DEFERRED_VOLUME;
457 /* If the flags have changed after init, let any clients know via a change event */
458 if (s->state != PA_SOURCE_INIT && flags != s->flags)
459 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
462 void pa_source_set_get_mute_callback(pa_source *s, pa_source_get_mute_cb_t cb) {
468 void pa_source_set_set_mute_callback(pa_source *s, pa_source_cb_t cb) {
469 pa_source_flags_t flags;
475 /* Save the current flags so we can tell if they've changed */
479 s->flags |= PA_SOURCE_HW_MUTE_CTRL;
481 s->flags &= ~PA_SOURCE_HW_MUTE_CTRL;
483 /* If the flags have changed after init, let any clients know via a change event */
484 if (s->state != PA_SOURCE_INIT && flags != s->flags)
485 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
488 static void enable_flat_volume(pa_source *s, bool enable) {
489 pa_source_flags_t flags;
493 /* Always follow the overall user preference here */
494 enable = enable && s->core->flat_volumes;
496 /* Save the current flags so we can tell if they've changed */
500 s->flags |= PA_SOURCE_FLAT_VOLUME;
502 s->flags &= ~PA_SOURCE_FLAT_VOLUME;
504 /* If the flags have changed after init, let any clients know via a change event */
505 if (s->state != PA_SOURCE_INIT && flags != s->flags)
506 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
509 void pa_source_enable_decibel_volume(pa_source *s, bool enable) {
510 pa_source_flags_t flags;
514 /* Save the current flags so we can tell if they've changed */
518 s->flags |= PA_SOURCE_DECIBEL_VOLUME;
519 enable_flat_volume(s, true);
521 s->flags &= ~PA_SOURCE_DECIBEL_VOLUME;
522 enable_flat_volume(s, false);
525 /* If the flags have changed after init, let any clients know via a change event */
526 if (s->state != PA_SOURCE_INIT && flags != s->flags)
527 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
530 /* Called from main context */
531 void pa_source_put(pa_source *s) {
532 pa_source_assert_ref(s);
533 pa_assert_ctl_context();
535 pa_assert(s->state == PA_SOURCE_INIT);
536 pa_assert(!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER) || s->output_from_master);
538 /* The following fields must be initialized properly when calling _put() */
539 pa_assert(s->asyncmsgq);
540 pa_assert(s->thread_info.min_latency <= s->thread_info.max_latency);
542 /* Generally, flags should be initialized via pa_source_new(). As a
543 * special exception we allow some volume related flags to be set
544 * between _new() and _put() by the callback setter functions above.
546 * Thus we implement a couple safeguards here which ensure the above
547 * setters were used (or at least the implementor made manual changes
548 * in a compatible way).
550 * Note: All of these flags set here can change over the life time
552 pa_assert(!(s->flags & PA_SOURCE_HW_VOLUME_CTRL) || s->set_volume);
553 pa_assert(!(s->flags & PA_SOURCE_DEFERRED_VOLUME) || s->write_volume);
554 pa_assert(!(s->flags & PA_SOURCE_HW_MUTE_CTRL) || s->set_mute);
556 /* XXX: Currently decibel volume is disabled for all sources that use volume
557 * sharing. When the master source supports decibel volume, it would be good
558 * to have the flag also in the filter source, but currently we don't do that
559 * so that the flags of the filter source never change when it's moved from
560 * a master source to another. One solution for this problem would be to
561 * remove user-visible volume altogether from filter sources when volume
562 * sharing is used, but the current approach was easier to implement... */
563 /* We always support decibel volumes in software, otherwise we leave it to
564 * the source implementor to set this flag as needed.
566 * Note: This flag can also change over the life time of the source. */
567 if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL) && !(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
568 pa_source_enable_decibel_volume(s, true);
570 /* If the source implementor support DB volumes by itself, we should always
571 * try and enable flat volumes too */
572 if ((s->flags & PA_SOURCE_DECIBEL_VOLUME))
573 enable_flat_volume(s, true);
575 if (s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER) {
576 pa_source *root_source = pa_source_get_master(s);
578 pa_assert(PA_LIKELY(root_source));
580 s->reference_volume = root_source->reference_volume;
581 pa_cvolume_remap(&s->reference_volume, &root_source->channel_map, &s->channel_map);
583 s->real_volume = root_source->real_volume;
584 pa_cvolume_remap(&s->real_volume, &root_source->channel_map, &s->channel_map);
586 /* We assume that if the sink implementor changed the default
587 * volume he did so in real_volume, because that is the usual
588 * place where he is supposed to place his changes. */
589 s->reference_volume = s->real_volume;
591 s->thread_info.soft_volume = s->soft_volume;
592 s->thread_info.soft_muted = s->muted;
593 pa_sw_cvolume_multiply(&s->thread_info.current_hw_volume, &s->soft_volume, &s->real_volume);
595 pa_assert((s->flags & PA_SOURCE_HW_VOLUME_CTRL)
596 || (s->base_volume == PA_VOLUME_NORM
597 && ((s->flags & PA_SOURCE_DECIBEL_VOLUME || (s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)))));
598 pa_assert(!(s->flags & PA_SOURCE_DECIBEL_VOLUME) || s->n_volume_steps == PA_VOLUME_NORM+1);
599 pa_assert(!(s->flags & PA_SOURCE_DYNAMIC_LATENCY) == (s->thread_info.fixed_latency != 0));
601 if (s->suspend_cause)
602 pa_assert_se(source_set_state(s, PA_SOURCE_SUSPENDED) == 0);
604 pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
606 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
607 pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
610 /* Called from main context */
611 void pa_source_unlink(pa_source *s) {
613 pa_source_output *o, *j = NULL;
616 pa_assert_ctl_context();
618 /* See pa_sink_unlink() for a couple of comments how this function
621 linked = PA_SOURCE_IS_LINKED(s->state);
624 pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
626 if (s->state != PA_SOURCE_UNLINKED)
627 pa_namereg_unregister(s->core, s->name);
628 pa_idxset_remove_by_data(s->core->sources, s, NULL);
631 pa_idxset_remove_by_data(s->card->sources, s, NULL);
633 while ((o = pa_idxset_first(s->outputs, NULL))) {
635 pa_source_output_kill(o);
640 source_set_state(s, PA_SOURCE_UNLINKED);
642 s->state = PA_SOURCE_UNLINKED;
647 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
648 pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
652 /* Called from main context */
653 static void source_free(pa_object *o) {
654 pa_source *s = PA_SOURCE(o);
657 pa_assert_ctl_context();
658 pa_assert(pa_source_refcnt(s) == 0);
660 if (PA_SOURCE_IS_LINKED(s->state))
663 pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
665 pa_idxset_free(s->outputs, NULL);
666 pa_hashmap_free(s->thread_info.outputs);
668 if (s->silence.memblock)
669 pa_memblock_unref(s->silence.memblock);
675 pa_proplist_free(s->proplist);
678 pa_hashmap_free(s->ports);
683 /* Called from main context, and not while the IO thread is active, please */
684 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
685 pa_source_assert_ref(s);
686 pa_assert_ctl_context();
691 /* Called from main context, and not while the IO thread is active, please */
692 void pa_source_update_flags(pa_source *s, pa_source_flags_t mask, pa_source_flags_t value) {
693 pa_source_flags_t old_flags;
694 pa_source_output *output;
697 pa_source_assert_ref(s);
698 pa_assert_ctl_context();
700 /* For now, allow only a minimal set of flags to be changed. */
701 pa_assert((mask & ~(PA_SOURCE_DYNAMIC_LATENCY|PA_SOURCE_LATENCY)) == 0);
703 old_flags = s->flags;
704 s->flags = (s->flags & ~mask) | (value & mask);
706 if (s->flags == old_flags)
709 if ((s->flags & PA_SOURCE_LATENCY) != (old_flags & PA_SOURCE_LATENCY))
710 pa_log_debug("Source %s: LATENCY flag %s.", s->name, (s->flags & PA_SOURCE_LATENCY) ? "enabled" : "disabled");
712 if ((s->flags & PA_SOURCE_DYNAMIC_LATENCY) != (old_flags & PA_SOURCE_DYNAMIC_LATENCY))
713 pa_log_debug("Source %s: DYNAMIC_LATENCY flag %s.",
714 s->name, (s->flags & PA_SOURCE_DYNAMIC_LATENCY) ? "enabled" : "disabled");
716 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
717 pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_FLAGS_CHANGED], s);
719 PA_IDXSET_FOREACH(output, s->outputs, idx) {
720 if (output->destination_source)
721 pa_source_update_flags(output->destination_source, mask, value);
725 /* Called from IO context, or before _put() from main context */
726 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
727 pa_source_assert_ref(s);
728 pa_source_assert_io_context(s);
730 s->thread_info.rtpoll = p;
733 /* Called from main context */
734 int pa_source_update_status(pa_source*s) {
735 pa_source_assert_ref(s);
736 pa_assert_ctl_context();
737 pa_assert(PA_SOURCE_IS_LINKED(s->state));
739 if (s->state == PA_SOURCE_SUSPENDED)
742 return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
745 /* Called from any context - must be threadsafe */
746 void pa_source_set_mixer_dirty(pa_source *s, bool is_dirty) {
747 pa_atomic_store(&s->mixer_dirty, is_dirty ? 1 : 0);
750 /* Called from main context */
751 int pa_source_suspend(pa_source *s, bool suspend, pa_suspend_cause_t cause) {
752 pa_source_assert_ref(s);
753 pa_assert_ctl_context();
754 pa_assert(PA_SOURCE_IS_LINKED(s->state));
755 pa_assert(cause != 0);
757 if (s->monitor_of && cause != PA_SUSPEND_PASSTHROUGH)
758 return -PA_ERR_NOTSUPPORTED;
761 s->suspend_cause |= cause;
763 s->suspend_cause &= ~cause;
765 if (!(s->suspend_cause & PA_SUSPEND_SESSION) && (pa_atomic_load(&s->mixer_dirty) != 0)) {
766 /* This might look racy but isn't: If somebody sets mixer_dirty exactly here,
767 it'll be handled just fine. */
768 pa_source_set_mixer_dirty(s, false);
769 pa_log_debug("Mixer is now accessible. Updating alsa mixer settings.");
770 if (s->active_port && s->set_port) {
771 if (s->flags & PA_SOURCE_DEFERRED_VOLUME) {
772 struct source_message_set_port msg = { .port = s->active_port, .ret = 0 };
773 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_PORT, &msg, 0, NULL) == 0);
776 s->set_port(s, s->active_port);
786 if ((pa_source_get_state(s) == PA_SOURCE_SUSPENDED) == !!s->suspend_cause)
789 pa_log_debug("Suspend cause of source %s is 0x%04x, %s", s->name, s->suspend_cause, s->suspend_cause ? "suspending" : "resuming");
791 if (s->suspend_cause)
792 return source_set_state(s, PA_SOURCE_SUSPENDED);
794 return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
797 /* Called from main context */
798 int pa_source_sync_suspend(pa_source *s) {
799 pa_sink_state_t state;
801 pa_source_assert_ref(s);
802 pa_assert_ctl_context();
803 pa_assert(PA_SOURCE_IS_LINKED(s->state));
804 pa_assert(s->monitor_of);
806 state = pa_sink_get_state(s->monitor_of);
808 if (state == PA_SINK_SUSPENDED)
809 return source_set_state(s, PA_SOURCE_SUSPENDED);
811 pa_assert(PA_SINK_IS_OPENED(state));
813 return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
816 /* Called from main context */
817 pa_queue *pa_source_move_all_start(pa_source *s, pa_queue *q) {
818 pa_source_output *o, *n;
821 pa_source_assert_ref(s);
822 pa_assert_ctl_context();
823 pa_assert(PA_SOURCE_IS_LINKED(s->state));
828 for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = n) {
829 n = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx));
831 pa_source_output_ref(o);
833 if (pa_source_output_start_move(o) >= 0)
836 pa_source_output_unref(o);
842 /* Called from main context */
843 void pa_source_move_all_finish(pa_source *s, pa_queue *q, bool save) {
846 pa_source_assert_ref(s);
847 pa_assert_ctl_context();
848 pa_assert(PA_SOURCE_IS_LINKED(s->state));
851 while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
852 if (pa_source_output_finish_move(o, s, save) < 0)
853 pa_source_output_fail_move(o);
855 pa_source_output_unref(o);
858 pa_queue_free(q, NULL);
861 /* Called from main context */
862 void pa_source_move_all_fail(pa_queue *q) {
865 pa_assert_ctl_context();
868 while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
869 pa_source_output_fail_move(o);
870 pa_source_output_unref(o);
873 pa_queue_free(q, NULL);
876 /* Called from IO thread context */
877 void pa_source_process_rewind(pa_source *s, size_t nbytes) {
881 pa_source_assert_ref(s);
882 pa_source_assert_io_context(s);
883 pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
888 if (s->thread_info.state == PA_SOURCE_SUSPENDED)
891 pa_log_debug("Processing rewind...");
893 PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state) {
894 pa_source_output_assert_ref(o);
895 pa_source_output_process_rewind(o, nbytes);
899 /* Called from IO thread context */
900 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
904 pa_source_assert_ref(s);
905 pa_source_assert_io_context(s);
906 pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
909 if (s->thread_info.state == PA_SOURCE_SUSPENDED)
912 if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
913 pa_memchunk vchunk = *chunk;
915 pa_memblock_ref(vchunk.memblock);
916 pa_memchunk_make_writable(&vchunk, 0);
918 if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
919 pa_silence_memchunk(&vchunk, &s->sample_spec);
921 pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
923 while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
924 pa_source_output_assert_ref(o);
926 if (!o->thread_info.direct_on_input)
927 pa_source_output_push(o, &vchunk);
930 pa_memblock_unref(vchunk.memblock);
933 while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
934 pa_source_output_assert_ref(o);
936 if (!o->thread_info.direct_on_input)
937 pa_source_output_push(o, chunk);
942 /* Called from IO thread context */
943 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk) {
944 pa_source_assert_ref(s);
945 pa_source_assert_io_context(s);
946 pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
947 pa_source_output_assert_ref(o);
948 pa_assert(o->thread_info.direct_on_input);
951 if (s->thread_info.state == PA_SOURCE_SUSPENDED)
954 if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
955 pa_memchunk vchunk = *chunk;
957 pa_memblock_ref(vchunk.memblock);
958 pa_memchunk_make_writable(&vchunk, 0);
960 if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
961 pa_silence_memchunk(&vchunk, &s->sample_spec);
963 pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
965 pa_source_output_push(o, &vchunk);
967 pa_memblock_unref(vchunk.memblock);
969 pa_source_output_push(o, chunk);
972 /* Called from main thread */
973 int pa_source_update_rate(pa_source *s, uint32_t rate, bool passthrough) {
975 uint32_t desired_rate = rate;
976 uint32_t default_rate = s->default_sample_rate;
977 uint32_t alternate_rate = s->alternate_sample_rate;
978 bool default_rate_is_usable = false;
979 bool alternate_rate_is_usable = false;
981 if (rate == s->sample_spec.rate)
984 if (!s->update_rate && !s->monitor_of)
987 if (PA_UNLIKELY(default_rate == alternate_rate && !passthrough)) {
988 pa_log_debug("Default and alternate sample rates are the same, so there is no point in switching.");
992 if (PA_SOURCE_IS_RUNNING(s->state)) {
993 pa_log_info("Cannot update rate, SOURCE_IS_RUNNING, will keep using %u Hz",
994 s->sample_spec.rate);
999 if (PA_SINK_IS_RUNNING(s->monitor_of->state)) {
1000 pa_log_info("Cannot update rate, this is a monitor source and the sink is running.");
1005 if (PA_UNLIKELY(!pa_sample_rate_valid(desired_rate)))
1008 if (!passthrough && default_rate != desired_rate && alternate_rate != desired_rate) {
1009 if (default_rate % 11025 == 0 && desired_rate % 11025 == 0)
1010 default_rate_is_usable = true;
1011 if (default_rate % 4000 == 0 && desired_rate % 4000 == 0)
1012 default_rate_is_usable = true;
1013 if (alternate_rate && alternate_rate % 11025 == 0 && desired_rate % 11025 == 0)
1014 alternate_rate_is_usable = true;
1015 if (alternate_rate && alternate_rate % 4000 == 0 && desired_rate % 4000 == 0)
1016 alternate_rate_is_usable = true;
1018 if (alternate_rate_is_usable && !default_rate_is_usable)
1019 desired_rate = alternate_rate;
1021 desired_rate = default_rate;
1024 if (desired_rate == s->sample_spec.rate)
1027 if (!passthrough && pa_source_used_by(s) > 0)
1030 pa_log_debug("Suspending source %s due to changing the sample rate.", s->name);
1031 pa_source_suspend(s, true, PA_SUSPEND_INTERNAL);
1034 ret = s->update_rate(s, desired_rate);
1036 /* This is a monitor source. */
1038 /* XXX: This code is written with non-passthrough streams in mind. I
1039 * have no idea whether the behaviour with passthrough streams is
1042 uint32_t old_rate = s->sample_spec.rate;
1044 s->sample_spec.rate = desired_rate;
1045 ret = pa_sink_update_rate(s->monitor_of, desired_rate, false);
1048 /* Changing the sink rate failed, roll back the old rate for
1049 * the monitor source. Why did we set the source rate before
1050 * calling pa_sink_update_rate(), you may ask. The reason is
1051 * that pa_sink_update_rate() tries to update the monitor
1052 * source rate, but we are already in the process of updating
1053 * the monitor source rate, so there's a risk of entering an
1054 * infinite loop. Setting the source rate before calling
1055 * pa_sink_update_rate() makes the rate == s->sample_spec.rate
1056 * check in the beginning of this function return early, so we
1058 s->sample_spec.rate = old_rate;
1066 pa_source_output *o;
1068 PA_IDXSET_FOREACH(o, s->outputs, idx) {
1069 if (o->state == PA_SOURCE_OUTPUT_CORKED)
1070 pa_source_output_update_rate(o);
1073 pa_log_info("Changed sampling rate successfully");
1076 pa_source_suspend(s, false, PA_SUSPEND_INTERNAL);
1081 /* Called from main thread */
1082 pa_usec_t pa_source_get_latency(pa_source *s) {
1085 pa_source_assert_ref(s);
1086 pa_assert_ctl_context();
1087 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1089 if (s->state == PA_SOURCE_SUSPENDED)
1092 if (!(s->flags & PA_SOURCE_LATENCY))
1095 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
1097 /* usec is unsigned, so check that the offset can be added to usec without
1099 if (-s->latency_offset <= (int64_t) usec)
1100 usec += s->latency_offset;
1107 /* Called from IO thread */
1108 pa_usec_t pa_source_get_latency_within_thread(pa_source *s) {
1112 pa_source_assert_ref(s);
1113 pa_source_assert_io_context(s);
1114 pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
1116 /* The returned value is supposed to be in the time domain of the sound card! */
1118 if (s->thread_info.state == PA_SOURCE_SUSPENDED)
1121 if (!(s->flags & PA_SOURCE_LATENCY))
1124 o = PA_MSGOBJECT(s);
1126 /* FIXME: We probably should make this a proper vtable callback instead of going through process_msg() */
1128 if (o->process_msg(o, PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
1131 /* usec is unsigned, so check that the offset can be added to usec without
1133 if (-s->thread_info.latency_offset <= (int64_t) usec)
1134 usec += s->thread_info.latency_offset;
1141 /* Called from the main thread (and also from the IO thread while the main
1142 * thread is waiting).
1144 * When a source uses volume sharing, it never has the PA_SOURCE_FLAT_VOLUME flag
1145 * set. Instead, flat volume mode is detected by checking whether the root source
1146 * has the flag set. */
1147 bool pa_source_flat_volume_enabled(pa_source *s) {
1148 pa_source_assert_ref(s);
1150 s = pa_source_get_master(s);
1153 return (s->flags & PA_SOURCE_FLAT_VOLUME);
1158 /* Called from the main thread (and also from the IO thread while the main
1159 * thread is waiting). */
1160 pa_source *pa_source_get_master(pa_source *s) {
1161 pa_source_assert_ref(s);
1163 while (s && (s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
1164 if (PA_UNLIKELY(!s->output_from_master))
1167 s = s->output_from_master->source;
1173 /* Called from main context */
1174 bool pa_source_is_passthrough(pa_source *s) {
1176 pa_source_assert_ref(s);
1178 /* NB Currently only monitor sources support passthrough mode */
1179 return (s->monitor_of && pa_sink_is_passthrough(s->monitor_of));
1182 /* Called from main context */
1183 void pa_source_enter_passthrough(pa_source *s) {
1186 /* set the volume to NORM */
1187 s->saved_volume = *pa_source_get_volume(s, true);
1188 s->saved_save_volume = s->save_volume;
1190 pa_cvolume_set(&volume, s->sample_spec.channels, PA_MIN(s->base_volume, PA_VOLUME_NORM));
1191 pa_source_set_volume(s, &volume, true, false);
1194 /* Called from main context */
1195 void pa_source_leave_passthrough(pa_source *s) {
1196 /* Restore source volume to what it was before we entered passthrough mode */
1197 pa_source_set_volume(s, &s->saved_volume, true, s->saved_save_volume);
1199 pa_cvolume_init(&s->saved_volume);
1200 s->saved_save_volume = false;
1203 /* Called from main context. */
1204 static void compute_reference_ratio(pa_source_output *o) {
1206 pa_cvolume remapped;
1210 pa_assert(pa_source_flat_volume_enabled(o->source));
1213 * Calculates the reference ratio from the source's reference
1214 * volume. This basically calculates:
1216 * o->reference_ratio = o->volume / o->source->reference_volume
1219 remapped = o->source->reference_volume;
1220 pa_cvolume_remap(&remapped, &o->source->channel_map, &o->channel_map);
1222 ratio = o->reference_ratio;
1224 for (c = 0; c < o->sample_spec.channels; c++) {
1226 /* We don't update when the source volume is 0 anyway */
1227 if (remapped.values[c] <= PA_VOLUME_MUTED)
1230 /* Don't update the reference ratio unless necessary */
1231 if (pa_sw_volume_multiply(
1233 remapped.values[c]) == o->volume.values[c])
1236 ratio.values[c] = pa_sw_volume_divide(
1237 o->volume.values[c],
1238 remapped.values[c]);
1241 pa_source_output_set_reference_ratio(o, &ratio);
1244 /* Called from main context. Only called for the root source in volume sharing
1245 * cases, except for internal recursive calls. */
1246 static void compute_reference_ratios(pa_source *s) {
1248 pa_source_output *o;
1250 pa_source_assert_ref(s);
1251 pa_assert_ctl_context();
1252 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1253 pa_assert(pa_source_flat_volume_enabled(s));
1255 PA_IDXSET_FOREACH(o, s->outputs, idx) {
1256 compute_reference_ratio(o);
1258 if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
1259 compute_reference_ratios(o->destination_source);
1263 /* Called from main context. Only called for the root source in volume sharing
1264 * cases, except for internal recursive calls. */
1265 static void compute_real_ratios(pa_source *s) {
1266 pa_source_output *o;
1269 pa_source_assert_ref(s);
1270 pa_assert_ctl_context();
1271 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1272 pa_assert(pa_source_flat_volume_enabled(s));
1274 PA_IDXSET_FOREACH(o, s->outputs, idx) {
1276 pa_cvolume remapped;
1278 if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
1279 /* The origin source uses volume sharing, so this input's real ratio
1280 * is handled as a special case - the real ratio must be 0 dB, and
1281 * as a result i->soft_volume must equal i->volume_factor. */
1282 pa_cvolume_reset(&o->real_ratio, o->real_ratio.channels);
1283 o->soft_volume = o->volume_factor;
1285 compute_real_ratios(o->destination_source);
1291 * This basically calculates:
1293 * i->real_ratio := i->volume / s->real_volume
1294 * i->soft_volume := i->real_ratio * i->volume_factor
1297 remapped = s->real_volume;
1298 pa_cvolume_remap(&remapped, &s->channel_map, &o->channel_map);
1300 o->real_ratio.channels = o->sample_spec.channels;
1301 o->soft_volume.channels = o->sample_spec.channels;
1303 for (c = 0; c < o->sample_spec.channels; c++) {
1305 if (remapped.values[c] <= PA_VOLUME_MUTED) {
1306 /* We leave o->real_ratio untouched */
1307 o->soft_volume.values[c] = PA_VOLUME_MUTED;
1311 /* Don't lose accuracy unless necessary */
1312 if (pa_sw_volume_multiply(
1313 o->real_ratio.values[c],
1314 remapped.values[c]) != o->volume.values[c])
1316 o->real_ratio.values[c] = pa_sw_volume_divide(
1317 o->volume.values[c],
1318 remapped.values[c]);
1320 o->soft_volume.values[c] = pa_sw_volume_multiply(
1321 o->real_ratio.values[c],
1322 o->volume_factor.values[c]);
1325 /* We don't copy the soft_volume to the thread_info data
1326 * here. That must be done by the caller */
1330 static pa_cvolume *cvolume_remap_minimal_impact(
1332 const pa_cvolume *template,
1333 const pa_channel_map *from,
1334 const pa_channel_map *to) {
1339 pa_assert(template);
1342 pa_assert(pa_cvolume_compatible_with_channel_map(v, from));
1343 pa_assert(pa_cvolume_compatible_with_channel_map(template, to));
1345 /* Much like pa_cvolume_remap(), but tries to minimize impact when
1346 * mapping from source output to source volumes:
1348 * If template is a possible remapping from v it is used instead
1349 * of remapping anew.
1351 * If the channel maps don't match we set an all-channel volume on
1352 * the source to ensure that changing a volume on one stream has no
1353 * effect that cannot be compensated for in another stream that
1354 * does not have the same channel map as the source. */
1356 if (pa_channel_map_equal(from, to))
1360 if (pa_cvolume_equal(pa_cvolume_remap(&t, to, from), v)) {
1365 pa_cvolume_set(v, to->channels, pa_cvolume_max(v));
1369 /* Called from main thread. Only called for the root source in volume sharing
1370 * cases, except for internal recursive calls. */
1371 static void get_maximum_output_volume(pa_source *s, pa_cvolume *max_volume, const pa_channel_map *channel_map) {
1372 pa_source_output *o;
1375 pa_source_assert_ref(s);
1376 pa_assert(max_volume);
1377 pa_assert(channel_map);
1378 pa_assert(pa_source_flat_volume_enabled(s));
1380 PA_IDXSET_FOREACH(o, s->outputs, idx) {
1381 pa_cvolume remapped;
1383 if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
1384 get_maximum_output_volume(o->destination_source, max_volume, channel_map);
1386 /* Ignore this output. The origin source uses volume sharing, so this
1387 * output's volume will be set to be equal to the root source's real
1388 * volume. Obviously this output's current volume must not then
1389 * affect what the root source's real volume will be. */
1393 remapped = o->volume;
1394 cvolume_remap_minimal_impact(&remapped, max_volume, &o->channel_map, channel_map);
1395 pa_cvolume_merge(max_volume, max_volume, &remapped);
1399 /* Called from main thread. Only called for the root source in volume sharing
1400 * cases, except for internal recursive calls. */
1401 static bool has_outputs(pa_source *s) {
1402 pa_source_output *o;
1405 pa_source_assert_ref(s);
1407 PA_IDXSET_FOREACH(o, s->outputs, idx) {
1408 if (!o->destination_source || !(o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER) || has_outputs(o->destination_source))
1415 /* Called from main thread. Only called for the root source in volume sharing
1416 * cases, except for internal recursive calls. */
1417 static void update_real_volume(pa_source *s, const pa_cvolume *new_volume, pa_channel_map *channel_map) {
1418 pa_source_output *o;
1421 pa_source_assert_ref(s);
1422 pa_assert(new_volume);
1423 pa_assert(channel_map);
1425 s->real_volume = *new_volume;
1426 pa_cvolume_remap(&s->real_volume, channel_map, &s->channel_map);
1428 PA_IDXSET_FOREACH(o, s->outputs, idx) {
1429 if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
1430 if (pa_source_flat_volume_enabled(s)) {
1431 pa_cvolume new_output_volume;
1433 /* Follow the root source's real volume. */
1434 new_output_volume = *new_volume;
1435 pa_cvolume_remap(&new_output_volume, channel_map, &o->channel_map);
1436 pa_source_output_set_volume_direct(o, &new_output_volume);
1437 compute_reference_ratio(o);
1440 update_real_volume(o->destination_source, new_volume, channel_map);
1445 /* Called from main thread. Only called for the root source in shared volume
1447 static void compute_real_volume(pa_source *s) {
1448 pa_source_assert_ref(s);
1449 pa_assert_ctl_context();
1450 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1451 pa_assert(pa_source_flat_volume_enabled(s));
1452 pa_assert(!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
1454 /* This determines the maximum volume of all streams and sets
1455 * s->real_volume accordingly. */
1457 if (!has_outputs(s)) {
1458 /* In the special case that we have no source outputs we leave the
1459 * volume unmodified. */
1460 update_real_volume(s, &s->reference_volume, &s->channel_map);
1464 pa_cvolume_mute(&s->real_volume, s->channel_map.channels);
1466 /* First let's determine the new maximum volume of all outputs
1467 * connected to this source */
1468 get_maximum_output_volume(s, &s->real_volume, &s->channel_map);
1469 update_real_volume(s, &s->real_volume, &s->channel_map);
1471 /* Then, let's update the real ratios/soft volumes of all outputs
1472 * connected to this source */
1473 compute_real_ratios(s);
1476 /* Called from main thread. Only called for the root source in shared volume
1477 * cases, except for internal recursive calls. */
1478 static void propagate_reference_volume(pa_source *s) {
1479 pa_source_output *o;
1482 pa_source_assert_ref(s);
1483 pa_assert_ctl_context();
1484 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1485 pa_assert(pa_source_flat_volume_enabled(s));
1487 /* This is called whenever the source volume changes that is not
1488 * caused by a source output volume change. We need to fix up the
1489 * source output volumes accordingly */
1491 PA_IDXSET_FOREACH(o, s->outputs, idx) {
1492 pa_cvolume new_volume;
1494 if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
1495 propagate_reference_volume(o->destination_source);
1497 /* Since the origin source uses volume sharing, this output's volume
1498 * needs to be updated to match the root source's real volume, but
1499 * that will be done later in update_shared_real_volume(). */
1503 /* This basically calculates:
1505 * o->volume := o->reference_volume * o->reference_ratio */
1507 new_volume = s->reference_volume;
1508 pa_cvolume_remap(&new_volume, &s->channel_map, &o->channel_map);
1509 pa_sw_cvolume_multiply(&new_volume, &new_volume, &o->reference_ratio);
1510 pa_source_output_set_volume_direct(o, &new_volume);
1514 /* Called from main thread. Only called for the root source in volume sharing
1515 * cases, except for internal recursive calls. The return value indicates
1516 * whether any reference volume actually changed. */
1517 static bool update_reference_volume(pa_source *s, const pa_cvolume *v, const pa_channel_map *channel_map, bool save) {
1519 bool reference_volume_changed;
1520 pa_source_output *o;
1523 pa_source_assert_ref(s);
1524 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1526 pa_assert(channel_map);
1527 pa_assert(pa_cvolume_valid(v));
1530 pa_cvolume_remap(&volume, channel_map, &s->channel_map);
1532 reference_volume_changed = !pa_cvolume_equal(&volume, &s->reference_volume);
1533 pa_source_set_reference_volume_direct(s, &volume);
1535 s->save_volume = (!reference_volume_changed && s->save_volume) || save;
1537 if (!reference_volume_changed && !(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
1538 /* If the root source's volume doesn't change, then there can't be any
1539 * changes in the other source in the source tree either.
1541 * It's probably theoretically possible that even if the root source's
1542 * volume changes slightly, some filter source doesn't change its volume
1543 * due to rounding errors. If that happens, we still want to propagate
1544 * the changed root source volume to the sources connected to the
1545 * intermediate source that didn't change its volume. This theoretical
1546 * possibility is the reason why we have that !(s->flags &
1547 * PA_SOURCE_SHARE_VOLUME_WITH_MASTER) condition. Probably nobody would
1548 * notice even if we returned here false always if
1549 * reference_volume_changed is false. */
1552 PA_IDXSET_FOREACH(o, s->outputs, idx) {
1553 if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
1554 update_reference_volume(o->destination_source, v, channel_map, false);
1560 /* Called from main thread */
1561 void pa_source_set_volume(
1563 const pa_cvolume *volume,
1567 pa_cvolume new_reference_volume;
1568 pa_source *root_source;
1570 pa_source_assert_ref(s);
1571 pa_assert_ctl_context();
1572 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1573 pa_assert(!volume || pa_cvolume_valid(volume));
1574 pa_assert(volume || pa_source_flat_volume_enabled(s));
1575 pa_assert(!volume || volume->channels == 1 || pa_cvolume_compatible(volume, &s->sample_spec));
1577 /* make sure we don't change the volume in PASSTHROUGH mode ...
1578 * ... *except* if we're being invoked to reset the volume to ensure 0 dB gain */
1579 if (pa_source_is_passthrough(s) && (!volume || !pa_cvolume_is_norm(volume))) {
1580 pa_log_warn("Cannot change volume, source is monitor of a PASSTHROUGH sink");
1584 /* In case of volume sharing, the volume is set for the root source first,
1585 * from which it's then propagated to the sharing sources. */
1586 root_source = pa_source_get_master(s);
1588 if (PA_UNLIKELY(!root_source))
1591 /* As a special exception we accept mono volumes on all sources --
1592 * even on those with more complex channel maps */
1595 if (pa_cvolume_compatible(volume, &s->sample_spec))
1596 new_reference_volume = *volume;
1598 new_reference_volume = s->reference_volume;
1599 pa_cvolume_scale(&new_reference_volume, pa_cvolume_max(volume));
1602 pa_cvolume_remap(&new_reference_volume, &s->channel_map, &root_source->channel_map);
1604 if (update_reference_volume(root_source, &new_reference_volume, &root_source->channel_map, save)) {
1605 if (pa_source_flat_volume_enabled(root_source)) {
1606 /* OK, propagate this volume change back to the outputs */
1607 propagate_reference_volume(root_source);
1609 /* And now recalculate the real volume */
1610 compute_real_volume(root_source);
1612 update_real_volume(root_source, &root_source->reference_volume, &root_source->channel_map);
1616 /* If volume is NULL we synchronize the source's real and
1617 * reference volumes with the stream volumes. */
1619 pa_assert(pa_source_flat_volume_enabled(root_source));
1621 /* Ok, let's determine the new real volume */
1622 compute_real_volume(root_source);
1624 /* Let's 'push' the reference volume if necessary */
1625 pa_cvolume_merge(&new_reference_volume, &s->reference_volume, &root_source->real_volume);
1626 /* If the source and its root don't have the same number of channels, we need to remap */
1627 if (s != root_source && !pa_channel_map_equal(&s->channel_map, &root_source->channel_map))
1628 pa_cvolume_remap(&new_reference_volume, &s->channel_map, &root_source->channel_map);
1629 update_reference_volume(root_source, &new_reference_volume, &root_source->channel_map, save);
1631 /* Now that the reference volume is updated, we can update the streams'
1632 * reference ratios. */
1633 compute_reference_ratios(root_source);
1636 if (root_source->set_volume) {
1637 /* If we have a function set_volume(), then we do not apply a
1638 * soft volume by default. However, set_volume() is free to
1639 * apply one to root_source->soft_volume */
1641 pa_cvolume_reset(&root_source->soft_volume, root_source->sample_spec.channels);
1642 if (!(root_source->flags & PA_SOURCE_DEFERRED_VOLUME))
1643 root_source->set_volume(root_source);
1646 /* If we have no function set_volume(), then the soft volume
1647 * becomes the real volume */
1648 root_source->soft_volume = root_source->real_volume;
1650 /* This tells the source that soft volume and/or real volume changed */
1652 pa_assert_se(pa_asyncmsgq_send(root_source->asyncmsgq, PA_MSGOBJECT(root_source), PA_SOURCE_MESSAGE_SET_SHARED_VOLUME, NULL, 0, NULL) == 0);
1655 /* Called from the io thread if sync volume is used, otherwise from the main thread.
1656 * Only to be called by source implementor */
1657 void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume) {
1659 pa_source_assert_ref(s);
1660 pa_assert(!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
1662 if (s->flags & PA_SOURCE_DEFERRED_VOLUME)
1663 pa_source_assert_io_context(s);
1665 pa_assert_ctl_context();
1668 pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
1670 s->soft_volume = *volume;
1672 if (PA_SOURCE_IS_LINKED(s->state) && !(s->flags & PA_SOURCE_DEFERRED_VOLUME))
1673 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
1675 s->thread_info.soft_volume = s->soft_volume;
1678 /* Called from the main thread. Only called for the root source in volume sharing
1679 * cases, except for internal recursive calls. */
1680 static void propagate_real_volume(pa_source *s, const pa_cvolume *old_real_volume) {
1681 pa_source_output *o;
1684 pa_source_assert_ref(s);
1685 pa_assert(old_real_volume);
1686 pa_assert_ctl_context();
1687 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1689 /* This is called when the hardware's real volume changes due to
1690 * some external event. We copy the real volume into our
1691 * reference volume and then rebuild the stream volumes based on
1692 * i->real_ratio which should stay fixed. */
1694 if (!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
1695 if (pa_cvolume_equal(old_real_volume, &s->real_volume))
1698 /* 1. Make the real volume the reference volume */
1699 update_reference_volume(s, &s->real_volume, &s->channel_map, true);
1702 if (pa_source_flat_volume_enabled(s)) {
1703 PA_IDXSET_FOREACH(o, s->outputs, idx) {
1704 pa_cvolume new_volume;
1706 /* 2. Since the source's reference and real volumes are equal
1707 * now our ratios should be too. */
1708 pa_source_output_set_reference_ratio(o, &o->real_ratio);
1710 /* 3. Recalculate the new stream reference volume based on the
1711 * reference ratio and the sink's reference volume.
1713 * This basically calculates:
1715 * o->volume = s->reference_volume * o->reference_ratio
1717 * This is identical to propagate_reference_volume() */
1718 new_volume = s->reference_volume;
1719 pa_cvolume_remap(&new_volume, &s->channel_map, &o->channel_map);
1720 pa_sw_cvolume_multiply(&new_volume, &new_volume, &o->reference_ratio);
1721 pa_source_output_set_volume_direct(o, &new_volume);
1723 if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
1724 propagate_real_volume(o->destination_source, old_real_volume);
1728 /* Something got changed in the hardware. It probably makes sense
1729 * to save changed hw settings given that hw volume changes not
1730 * triggered by PA are almost certainly done by the user. */
1731 if (!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
1732 s->save_volume = true;
1735 /* Called from io thread */
1736 void pa_source_update_volume_and_mute(pa_source *s) {
1738 pa_source_assert_io_context(s);
1740 pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_UPDATE_VOLUME_AND_MUTE, NULL, 0, NULL, NULL);
1743 /* Called from main thread */
1744 const pa_cvolume *pa_source_get_volume(pa_source *s, bool force_refresh) {
1745 pa_source_assert_ref(s);
1746 pa_assert_ctl_context();
1747 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1749 if (s->refresh_volume || force_refresh) {
1750 struct pa_cvolume old_real_volume;
1752 pa_assert(!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
1754 old_real_volume = s->real_volume;
1756 if (!(s->flags & PA_SOURCE_DEFERRED_VOLUME) && s->get_volume)
1759 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, NULL, 0, NULL) == 0);
1761 update_real_volume(s, &s->real_volume, &s->channel_map);
1762 propagate_real_volume(s, &old_real_volume);
1765 return &s->reference_volume;
1768 /* Called from main thread. In volume sharing cases, only the root source may
1770 void pa_source_volume_changed(pa_source *s, const pa_cvolume *new_real_volume) {
1771 pa_cvolume old_real_volume;
1773 pa_source_assert_ref(s);
1774 pa_assert_ctl_context();
1775 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1776 pa_assert(!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
1778 /* The source implementor may call this if the volume changed to make sure everyone is notified */
1780 old_real_volume = s->real_volume;
1781 update_real_volume(s, new_real_volume, &s->channel_map);
1782 propagate_real_volume(s, &old_real_volume);
1785 /* Called from main thread */
1786 void pa_source_set_mute(pa_source *s, bool mute, bool save) {
1789 pa_source_assert_ref(s);
1790 pa_assert_ctl_context();
1792 old_muted = s->muted;
1794 if (mute == old_muted) {
1795 s->save_muted |= save;
1800 s->save_muted = save;
1802 if (!(s->flags & PA_SOURCE_DEFERRED_VOLUME) && s->set_mute) {
1803 s->set_mute_in_progress = true;
1805 s->set_mute_in_progress = false;
1808 if (!PA_SOURCE_IS_LINKED(s->state))
1811 pa_log_debug("The mute of source %s changed from %s to %s.", s->name, pa_yes_no(old_muted), pa_yes_no(mute));
1812 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, NULL, 0, NULL) == 0);
1813 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
1814 pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_MUTE_CHANGED], s);
1817 /* Called from main thread */
1818 bool pa_source_get_mute(pa_source *s, bool force_refresh) {
1820 pa_source_assert_ref(s);
1821 pa_assert_ctl_context();
1822 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1824 if ((s->refresh_muted || force_refresh) && s->get_mute) {
1827 if (s->flags & PA_SOURCE_DEFERRED_VOLUME) {
1828 if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, &mute, 0, NULL) >= 0)
1829 pa_source_mute_changed(s, mute);
1831 if (s->get_mute(s, &mute) >= 0)
1832 pa_source_mute_changed(s, mute);
1839 /* Called from main thread */
1840 void pa_source_mute_changed(pa_source *s, bool new_muted) {
1841 pa_source_assert_ref(s);
1842 pa_assert_ctl_context();
1843 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1845 if (s->set_mute_in_progress)
1848 /* pa_source_set_mute() does this same check, so this may appear redundant,
1849 * but we must have this here also, because the save parameter of
1850 * pa_source_set_mute() would otherwise have unintended side effects
1851 * (saving the mute state when it shouldn't be saved). */
1852 if (new_muted == s->muted)
1855 pa_source_set_mute(s, new_muted, true);
1858 /* Called from main thread */
1859 bool pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p) {
1860 pa_source_assert_ref(s);
1861 pa_assert_ctl_context();
1864 pa_proplist_update(s->proplist, mode, p);
1866 if (PA_SOURCE_IS_LINKED(s->state)) {
1867 pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
1868 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
1874 /* Called from main thread */
1875 /* FIXME -- this should be dropped and be merged into pa_source_update_proplist() */
1876 void pa_source_set_description(pa_source *s, const char *description) {
1878 pa_source_assert_ref(s);
1879 pa_assert_ctl_context();
1881 if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
1884 old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
1886 if (old && description && pa_streq(old, description))
1890 pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
1892 pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
1894 if (PA_SOURCE_IS_LINKED(s->state)) {
1895 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
1896 pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
1900 /* Called from main thread */
1901 unsigned pa_source_linked_by(pa_source *s) {
1902 pa_source_assert_ref(s);
1903 pa_assert_ctl_context();
1904 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1906 return pa_idxset_size(s->outputs);
1909 /* Called from main thread */
1910 unsigned pa_source_used_by(pa_source *s) {
1913 pa_source_assert_ref(s);
1914 pa_assert_ctl_context();
1915 pa_assert(PA_SOURCE_IS_LINKED(s->state));
1917 ret = pa_idxset_size(s->outputs);
1918 pa_assert(ret >= s->n_corked);
1920 return ret - s->n_corked;
1923 /* Called from main thread */
1924 unsigned pa_source_check_suspend(pa_source *s) {
1926 pa_source_output *o;
1929 pa_source_assert_ref(s);
1930 pa_assert_ctl_context();
1932 if (!PA_SOURCE_IS_LINKED(s->state))
1937 PA_IDXSET_FOREACH(o, s->outputs, idx) {
1938 pa_source_output_state_t st;
1940 st = pa_source_output_get_state(o);
1942 /* We do not assert here. It is perfectly valid for a source output to
1943 * be in the INIT state (i.e. created, marked done but not yet put)
1944 * and we should not care if it's unlinked as it won't contribute
1945 * towards our busy status.
1947 if (!PA_SOURCE_OUTPUT_IS_LINKED(st))
1950 if (st == PA_SOURCE_OUTPUT_CORKED)
1953 if (o->flags & PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND)
1962 /* Called from the IO thread */
1963 static void sync_output_volumes_within_thread(pa_source *s) {
1964 pa_source_output *o;
1967 pa_source_assert_ref(s);
1968 pa_source_assert_io_context(s);
1970 PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state) {
1971 if (pa_cvolume_equal(&o->thread_info.soft_volume, &o->soft_volume))
1974 o->thread_info.soft_volume = o->soft_volume;
1975 //pa_source_output_request_rewind(o, 0, true, false, false);
1979 /* Called from the IO thread. Only called for the root source in volume sharing
1980 * cases, except for internal recursive calls. */
1981 static void set_shared_volume_within_thread(pa_source *s) {
1982 pa_source_output *o;
1985 pa_source_assert_ref(s);
1987 PA_MSGOBJECT(s)->process_msg(PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME_SYNCED, NULL, 0, NULL);
1989 PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state) {
1990 if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
1991 set_shared_volume_within_thread(o->destination_source);
1995 /* Called from IO thread, except when it is not */
1996 int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
1997 pa_source *s = PA_SOURCE(object);
1998 pa_source_assert_ref(s);
2000 switch ((pa_source_message_t) code) {
2002 case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
2003 pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
2005 pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
2007 if (o->direct_on_input) {
2008 o->thread_info.direct_on_input = o->direct_on_input;
2009 pa_hashmap_put(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index), o);
2012 pa_assert(!o->thread_info.attached);
2013 o->thread_info.attached = true;
2018 pa_source_output_set_state_within_thread(o, o->state);
2020 if (o->thread_info.requested_source_latency != (pa_usec_t) -1)
2021 pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
2023 pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
2025 /* We don't just invalidate the requested latency here,
2026 * because if we are in a move we might need to fix up the
2027 * requested latency. */
2028 pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
2030 /* In flat volume mode we need to update the volume as
2032 return object->process_msg(object, PA_SOURCE_MESSAGE_SET_SHARED_VOLUME, NULL, 0, NULL);
2035 case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
2036 pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
2038 pa_source_output_set_state_within_thread(o, o->state);
2043 pa_assert(o->thread_info.attached);
2044 o->thread_info.attached = false;
2046 if (o->thread_info.direct_on_input) {
2047 pa_hashmap_remove(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index));
2048 o->thread_info.direct_on_input = NULL;
2051 pa_hashmap_remove_and_free(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index));
2052 pa_source_invalidate_requested_latency(s, true);
2054 /* In flat volume mode we need to update the volume as
2056 return object->process_msg(object, PA_SOURCE_MESSAGE_SET_SHARED_VOLUME, NULL, 0, NULL);
2059 case PA_SOURCE_MESSAGE_SET_SHARED_VOLUME: {
2060 pa_source *root_source = pa_source_get_master(s);
2062 if (PA_LIKELY(root_source))
2063 set_shared_volume_within_thread(root_source);
2068 case PA_SOURCE_MESSAGE_SET_VOLUME_SYNCED:
2070 if (s->flags & PA_SOURCE_DEFERRED_VOLUME) {
2072 pa_source_volume_change_push(s);
2074 /* Fall through ... */
2076 case PA_SOURCE_MESSAGE_SET_VOLUME:
2078 if (!pa_cvolume_equal(&s->thread_info.soft_volume, &s->soft_volume)) {
2079 s->thread_info.soft_volume = s->soft_volume;
2082 /* Fall through ... */
2084 case PA_SOURCE_MESSAGE_SYNC_VOLUMES:
2085 sync_output_volumes_within_thread(s);
2088 case PA_SOURCE_MESSAGE_GET_VOLUME:
2090 if ((s->flags & PA_SOURCE_DEFERRED_VOLUME) && s->get_volume) {
2092 pa_source_volume_change_flush(s);
2093 pa_sw_cvolume_divide(&s->thread_info.current_hw_volume, &s->real_volume, &s->soft_volume);
2096 /* In case source implementor reset SW volume. */
2097 if (!pa_cvolume_equal(&s->thread_info.soft_volume, &s->soft_volume)) {
2098 s->thread_info.soft_volume = s->soft_volume;
2103 case PA_SOURCE_MESSAGE_SET_MUTE:
2105 if (s->thread_info.soft_muted != s->muted) {
2106 s->thread_info.soft_muted = s->muted;
2109 if (s->flags & PA_SOURCE_DEFERRED_VOLUME && s->set_mute)
2114 case PA_SOURCE_MESSAGE_GET_MUTE:
2116 if (s->flags & PA_SOURCE_DEFERRED_VOLUME && s->get_mute)
2117 return s->get_mute(s, userdata);
2121 case PA_SOURCE_MESSAGE_SET_STATE: {
2123 bool suspend_change =
2124 (s->thread_info.state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(PA_PTR_TO_UINT(userdata))) ||
2125 (PA_SOURCE_IS_OPENED(s->thread_info.state) && PA_PTR_TO_UINT(userdata) == PA_SOURCE_SUSPENDED);
2127 s->thread_info.state = PA_PTR_TO_UINT(userdata);
2129 if (suspend_change) {
2130 pa_source_output *o;
2133 while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
2134 if (o->suspend_within_thread)
2135 o->suspend_within_thread(o, s->thread_info.state == PA_SOURCE_SUSPENDED);
2141 case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: {
2143 pa_usec_t *usec = userdata;
2144 *usec = pa_source_get_requested_latency_within_thread(s);
2146 /* Yes, that's right, the IO thread will see -1 when no
2147 * explicit requested latency is configured, the main
2148 * thread will see max_latency */
2149 if (*usec == (pa_usec_t) -1)
2150 *usec = s->thread_info.max_latency;
2155 case PA_SOURCE_MESSAGE_SET_LATENCY_RANGE: {
2156 pa_usec_t *r = userdata;
2158 pa_source_set_latency_range_within_thread(s, r[0], r[1]);
2163 case PA_SOURCE_MESSAGE_GET_LATENCY_RANGE: {
2164 pa_usec_t *r = userdata;
2166 r[0] = s->thread_info.min_latency;
2167 r[1] = s->thread_info.max_latency;
2172 case PA_SOURCE_MESSAGE_GET_FIXED_LATENCY:
2174 *((pa_usec_t*) userdata) = s->thread_info.fixed_latency;
2177 case PA_SOURCE_MESSAGE_SET_FIXED_LATENCY:
2179 pa_source_set_fixed_latency_within_thread(s, (pa_usec_t) offset);
2182 case PA_SOURCE_MESSAGE_GET_MAX_REWIND:
2184 *((size_t*) userdata) = s->thread_info.max_rewind;
2187 case PA_SOURCE_MESSAGE_SET_MAX_REWIND:
2189 pa_source_set_max_rewind_within_thread(s, (size_t) offset);
2192 case PA_SOURCE_MESSAGE_GET_LATENCY:
2194 if (s->monitor_of) {
2195 *((pa_usec_t*) userdata) = 0;
2199 /* Implementors need to overwrite this implementation! */
2202 case PA_SOURCE_MESSAGE_SET_PORT:
2204 pa_assert(userdata);
2206 struct source_message_set_port *msg_data = userdata;
2207 msg_data->ret = s->set_port(s, msg_data->port);
2211 case PA_SOURCE_MESSAGE_UPDATE_VOLUME_AND_MUTE:
2212 /* This message is sent from IO-thread and handled in main thread. */
2213 pa_assert_ctl_context();
2215 /* Make sure we're not messing with main thread when no longer linked */
2216 if (!PA_SOURCE_IS_LINKED(s->state))
2219 pa_source_get_volume(s, true);
2220 pa_source_get_mute(s, true);
2223 case PA_SOURCE_MESSAGE_SET_LATENCY_OFFSET:
2224 s->thread_info.latency_offset = offset;
2227 case PA_SOURCE_MESSAGE_MAX:
2234 /* Called from main thread */
2235 int pa_source_suspend_all(pa_core *c, bool suspend, pa_suspend_cause_t cause) {
2240 pa_core_assert_ref(c);
2241 pa_assert_ctl_context();
2242 pa_assert(cause != 0);
2244 for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx))) {
2247 if (source->monitor_of)
2250 if ((r = pa_source_suspend(source, suspend, cause)) < 0)
2257 /* Called from IO thread */
2258 void pa_source_detach_within_thread(pa_source *s) {
2259 pa_source_output *o;
2262 pa_source_assert_ref(s);
2263 pa_source_assert_io_context(s);
2264 pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
2266 PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
2271 /* Called from IO thread */
2272 void pa_source_attach_within_thread(pa_source *s) {
2273 pa_source_output *o;
2276 pa_source_assert_ref(s);
2277 pa_source_assert_io_context(s);
2278 pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
2280 PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
2285 /* Called from IO thread */
2286 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
2287 pa_usec_t result = (pa_usec_t) -1;
2288 pa_source_output *o;
2291 pa_source_assert_ref(s);
2292 pa_source_assert_io_context(s);
2294 if (!(s->flags & PA_SOURCE_DYNAMIC_LATENCY))
2295 return PA_CLAMP(s->thread_info.fixed_latency, s->thread_info.min_latency, s->thread_info.max_latency);
2297 if (s->thread_info.requested_latency_valid)
2298 return s->thread_info.requested_latency;
2300 PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
2301 if (o->thread_info.requested_source_latency != (pa_usec_t) -1 &&
2302 (result == (pa_usec_t) -1 || result > o->thread_info.requested_source_latency))
2303 result = o->thread_info.requested_source_latency;
2305 if (result != (pa_usec_t) -1)
2306 result = PA_CLAMP(result, s->thread_info.min_latency, s->thread_info.max_latency);
2308 if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
2309 /* Only cache this if we are fully set up */
2310 s->thread_info.requested_latency = result;
2311 s->thread_info.requested_latency_valid = true;
2317 /* Called from main thread */
2318 pa_usec_t pa_source_get_requested_latency(pa_source *s) {
2321 pa_source_assert_ref(s);
2322 pa_assert_ctl_context();
2323 pa_assert(PA_SOURCE_IS_LINKED(s->state));
2325 if (s->state == PA_SOURCE_SUSPENDED)
2328 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
2333 /* Called from IO thread */
2334 void pa_source_set_max_rewind_within_thread(pa_source *s, size_t max_rewind) {
2335 pa_source_output *o;
2338 pa_source_assert_ref(s);
2339 pa_source_assert_io_context(s);
2341 if (max_rewind == s->thread_info.max_rewind)
2344 s->thread_info.max_rewind = max_rewind;
2346 if (PA_SOURCE_IS_LINKED(s->thread_info.state))
2347 PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
2348 pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
2351 /* Called from main thread */
2352 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
2353 pa_source_assert_ref(s);
2354 pa_assert_ctl_context();
2356 if (PA_SOURCE_IS_LINKED(s->state))
2357 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MAX_REWIND, NULL, max_rewind, NULL) == 0);
2359 pa_source_set_max_rewind_within_thread(s, max_rewind);
2362 /* Called from IO thread */
2363 void pa_source_invalidate_requested_latency(pa_source *s, bool dynamic) {
2364 pa_source_output *o;
2367 pa_source_assert_ref(s);
2368 pa_source_assert_io_context(s);
2370 if ((s->flags & PA_SOURCE_DYNAMIC_LATENCY))
2371 s->thread_info.requested_latency_valid = false;
2375 if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
2377 if (s->update_requested_latency)
2378 s->update_requested_latency(s);
2380 while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
2381 if (o->update_source_requested_latency)
2382 o->update_source_requested_latency(o);
2386 pa_sink_invalidate_requested_latency(s->monitor_of, dynamic);
2389 /* Called from main thread */
2390 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
2391 pa_source_assert_ref(s);
2392 pa_assert_ctl_context();
2394 /* min_latency == 0: no limit
2395 * min_latency anything else: specified limit
2397 * Similar for max_latency */
2399 if (min_latency < ABSOLUTE_MIN_LATENCY)
2400 min_latency = ABSOLUTE_MIN_LATENCY;
2402 if (max_latency <= 0 ||
2403 max_latency > ABSOLUTE_MAX_LATENCY)
2404 max_latency = ABSOLUTE_MAX_LATENCY;
2406 pa_assert(min_latency <= max_latency);
2408 /* Hmm, let's see if someone forgot to set PA_SOURCE_DYNAMIC_LATENCY here... */
2409 pa_assert((min_latency == ABSOLUTE_MIN_LATENCY &&
2410 max_latency == ABSOLUTE_MAX_LATENCY) ||
2411 (s->flags & PA_SOURCE_DYNAMIC_LATENCY));
2413 if (PA_SOURCE_IS_LINKED(s->state)) {
2419 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
2421 pa_source_set_latency_range_within_thread(s, min_latency, max_latency);
2424 /* Called from main thread */
2425 void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
2426 pa_source_assert_ref(s);
2427 pa_assert_ctl_context();
2428 pa_assert(min_latency);
2429 pa_assert(max_latency);
2431 if (PA_SOURCE_IS_LINKED(s->state)) {
2432 pa_usec_t r[2] = { 0, 0 };
2434 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY_RANGE, r, 0, NULL) == 0);
2436 *min_latency = r[0];
2437 *max_latency = r[1];
2439 *min_latency = s->thread_info.min_latency;
2440 *max_latency = s->thread_info.max_latency;
2444 /* Called from IO thread, and from main thread before pa_source_put() is called */
2445 void pa_source_set_latency_range_within_thread(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
2446 pa_source_assert_ref(s);
2447 pa_source_assert_io_context(s);
2449 pa_assert(min_latency >= ABSOLUTE_MIN_LATENCY);
2450 pa_assert(max_latency <= ABSOLUTE_MAX_LATENCY);
2451 pa_assert(min_latency <= max_latency);
2453 /* Hmm, let's see if someone forgot to set PA_SOURCE_DYNAMIC_LATENCY here... */
2454 pa_assert((min_latency == ABSOLUTE_MIN_LATENCY &&
2455 max_latency == ABSOLUTE_MAX_LATENCY) ||
2456 (s->flags & PA_SOURCE_DYNAMIC_LATENCY) ||
2459 if (s->thread_info.min_latency == min_latency &&
2460 s->thread_info.max_latency == max_latency)
2463 s->thread_info.min_latency = min_latency;
2464 s->thread_info.max_latency = max_latency;
2466 if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
2467 pa_source_output *o;
2470 PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
2471 if (o->update_source_latency_range)
2472 o->update_source_latency_range(o);
2475 pa_source_invalidate_requested_latency(s, false);
2478 /* Called from main thread, before the source is put */
2479 void pa_source_set_fixed_latency(pa_source *s, pa_usec_t latency) {
2480 pa_source_assert_ref(s);
2481 pa_assert_ctl_context();
2483 if (s->flags & PA_SOURCE_DYNAMIC_LATENCY) {
2484 pa_assert(latency == 0);
2488 if (latency < ABSOLUTE_MIN_LATENCY)
2489 latency = ABSOLUTE_MIN_LATENCY;
2491 if (latency > ABSOLUTE_MAX_LATENCY)
2492 latency = ABSOLUTE_MAX_LATENCY;
2494 if (PA_SOURCE_IS_LINKED(s->state))
2495 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_FIXED_LATENCY, NULL, (int64_t) latency, NULL) == 0);
2497 s->thread_info.fixed_latency = latency;
2500 /* Called from main thread */
2501 pa_usec_t pa_source_get_fixed_latency(pa_source *s) {
2504 pa_source_assert_ref(s);
2505 pa_assert_ctl_context();
2507 if (s->flags & PA_SOURCE_DYNAMIC_LATENCY)
2510 if (PA_SOURCE_IS_LINKED(s->state))
2511 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_FIXED_LATENCY, &latency, 0, NULL) == 0);
2513 latency = s->thread_info.fixed_latency;
2518 /* Called from IO thread */
2519 void pa_source_set_fixed_latency_within_thread(pa_source *s, pa_usec_t latency) {
2520 pa_source_assert_ref(s);
2521 pa_source_assert_io_context(s);
2523 if (s->flags & PA_SOURCE_DYNAMIC_LATENCY) {
2524 pa_assert(latency == 0);
2525 s->thread_info.fixed_latency = 0;
2530 pa_assert(latency >= ABSOLUTE_MIN_LATENCY);
2531 pa_assert(latency <= ABSOLUTE_MAX_LATENCY);
2533 if (s->thread_info.fixed_latency == latency)
2536 s->thread_info.fixed_latency = latency;
2538 if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
2539 pa_source_output *o;
2542 PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
2543 if (o->update_source_fixed_latency)
2544 o->update_source_fixed_latency(o);
2547 pa_source_invalidate_requested_latency(s, false);
2550 /* Called from main thread */
2551 void pa_source_set_latency_offset(pa_source *s, int64_t offset) {
2552 pa_source_assert_ref(s);
2554 s->latency_offset = offset;
2556 if (PA_SOURCE_IS_LINKED(s->state))
2557 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_LATENCY_OFFSET, NULL, offset, NULL) == 0);
2559 s->thread_info.latency_offset = offset;
2562 /* Called from main thread */
2563 size_t pa_source_get_max_rewind(pa_source *s) {
2565 pa_assert_ctl_context();
2566 pa_source_assert_ref(s);
2568 if (!PA_SOURCE_IS_LINKED(s->state))
2569 return s->thread_info.max_rewind;
2571 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
2576 /* Called from main context */
2577 int pa_source_set_port(pa_source *s, const char *name, bool save) {
2578 pa_device_port *port;
2581 pa_source_assert_ref(s);
2582 pa_assert_ctl_context();
2585 pa_log_debug("set_port() operation not implemented for source %u \"%s\"", s->index, s->name);
2586 return -PA_ERR_NOTIMPLEMENTED;
2590 return -PA_ERR_NOENTITY;
2592 if (!(port = pa_hashmap_get(s->ports, name)))
2593 return -PA_ERR_NOENTITY;
2595 if (s->active_port == port) {
2596 s->save_port = s->save_port || save;
2600 if (s->flags & PA_SOURCE_DEFERRED_VOLUME) {
2601 struct source_message_set_port msg = { .port = port, .ret = 0 };
2602 pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_PORT, &msg, 0, NULL) == 0);
2606 ret = s->set_port(s, port);
2609 return -PA_ERR_NOENTITY;
2611 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
2613 pa_log_info("Changed port of source %u \"%s\" to %s", s->index, s->name, port->name);
2615 s->active_port = port;
2616 s->save_port = save;
2618 pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PORT_CHANGED], s);
2623 PA_STATIC_FLIST_DECLARE(pa_source_volume_change, 0, pa_xfree);
2625 /* Called from the IO thread. */
2626 static pa_source_volume_change *pa_source_volume_change_new(pa_source *s) {
2627 pa_source_volume_change *c;
2628 if (!(c = pa_flist_pop(PA_STATIC_FLIST_GET(pa_source_volume_change))))
2629 c = pa_xnew(pa_source_volume_change, 1);
2631 PA_LLIST_INIT(pa_source_volume_change, c);
2633 pa_cvolume_reset(&c->hw_volume, s->sample_spec.channels);
2637 /* Called from the IO thread. */
2638 static void pa_source_volume_change_free(pa_source_volume_change *c) {
2640 if (pa_flist_push(PA_STATIC_FLIST_GET(pa_source_volume_change), c) < 0)
2644 /* Called from the IO thread. */
2645 void pa_source_volume_change_push(pa_source *s) {
2646 pa_source_volume_change *c = NULL;
2647 pa_source_volume_change *nc = NULL;
2648 uint32_t safety_margin = s->thread_info.volume_change_safety_margin;
2650 const char *direction = NULL;
2653 nc = pa_source_volume_change_new(s);
2655 /* NOTE: There is already more different volumes in pa_source that I can remember.
2656 * Adding one more volume for HW would get us rid of this, but I am trying
2657 * to survive with the ones we already have. */
2658 pa_sw_cvolume_divide(&nc->hw_volume, &s->real_volume, &s->soft_volume);
2660 if (!s->thread_info.volume_changes && pa_cvolume_equal(&nc->hw_volume, &s->thread_info.current_hw_volume)) {
2661 pa_log_debug("Volume not changing");
2662 pa_source_volume_change_free(nc);
2666 nc->at = pa_source_get_latency_within_thread(s);
2667 nc->at += pa_rtclock_now() + s->thread_info.volume_change_extra_delay;
2669 if (s->thread_info.volume_changes_tail) {
2670 for (c = s->thread_info.volume_changes_tail; c; c = c->prev) {
2671 /* If volume is going up let's do it a bit late. If it is going
2672 * down let's do it a bit early. */
2673 if (pa_cvolume_avg(&nc->hw_volume) > pa_cvolume_avg(&c->hw_volume)) {
2674 if (nc->at + safety_margin > c->at) {
2675 nc->at += safety_margin;
2680 else if (nc->at - safety_margin > c->at) {
2681 nc->at -= safety_margin;
2689 if (pa_cvolume_avg(&nc->hw_volume) > pa_cvolume_avg(&s->thread_info.current_hw_volume)) {
2690 nc->at += safety_margin;
2693 nc->at -= safety_margin;
2696 PA_LLIST_PREPEND(pa_source_volume_change, s->thread_info.volume_changes, nc);
2699 PA_LLIST_INSERT_AFTER(pa_source_volume_change, s->thread_info.volume_changes, c, nc);
2702 pa_log_debug("Volume going %s to %d at %llu", direction, pa_cvolume_avg(&nc->hw_volume), (long long unsigned) nc->at);
2704 /* We can ignore volume events that came earlier but should happen later than this. */
2705 PA_LLIST_FOREACH(c, nc->next) {
2706 pa_log_debug("Volume change to %d at %llu was dropped", pa_cvolume_avg(&c->hw_volume), (long long unsigned) c->at);
2707 pa_source_volume_change_free(c);
2710 s->thread_info.volume_changes_tail = nc;
2713 /* Called from the IO thread. */
2714 static void pa_source_volume_change_flush(pa_source *s) {
2715 pa_source_volume_change *c = s->thread_info.volume_changes;
2717 s->thread_info.volume_changes = NULL;
2718 s->thread_info.volume_changes_tail = NULL;
2720 pa_source_volume_change *next = c->next;
2721 pa_source_volume_change_free(c);
2726 /* Called from the IO thread. */
2727 bool pa_source_volume_change_apply(pa_source *s, pa_usec_t *usec_to_next) {
2733 if (!s->thread_info.volume_changes || !PA_SOURCE_IS_LINKED(s->state)) {
2739 pa_assert(s->write_volume);
2741 now = pa_rtclock_now();
2743 while (s->thread_info.volume_changes && now >= s->thread_info.volume_changes->at) {
2744 pa_source_volume_change *c = s->thread_info.volume_changes;
2745 PA_LLIST_REMOVE(pa_source_volume_change, s->thread_info.volume_changes, c);
2746 pa_log_debug("Volume change to %d at %llu was written %llu usec late",
2747 pa_cvolume_avg(&c->hw_volume), (long long unsigned) c->at, (long long unsigned) (now - c->at));
2749 s->thread_info.current_hw_volume = c->hw_volume;
2750 pa_source_volume_change_free(c);
2756 if (s->thread_info.volume_changes) {
2758 *usec_to_next = s->thread_info.volume_changes->at - now;
2759 if (pa_log_ratelimit(PA_LOG_DEBUG))
2760 pa_log_debug("Next volume change in %lld usec", (long long) (s->thread_info.volume_changes->at - now));
2765 s->thread_info.volume_changes_tail = NULL;
2770 /* Called from the main thread */
2771 /* Gets the list of formats supported by the source. The members and idxset must
2772 * be freed by the caller. */
2773 pa_idxset* pa_source_get_formats(pa_source *s) {
2778 if (s->get_formats) {
2779 /* Source supports format query, all is good */
2780 ret = s->get_formats(s);
2782 /* Source doesn't support format query, so assume it does PCM */
2783 pa_format_info *f = pa_format_info_new();
2784 f->encoding = PA_ENCODING_PCM;
2786 ret = pa_idxset_new(NULL, NULL);
2787 pa_idxset_put(ret, f, NULL);
2793 /* Called from the main thread */
2794 /* Checks if the source can accept this format */
2795 bool pa_source_check_format(pa_source *s, pa_format_info *f) {
2796 pa_idxset *formats = NULL;
2802 formats = pa_source_get_formats(s);
2805 pa_format_info *finfo_device;
2808 PA_IDXSET_FOREACH(finfo_device, formats, i) {
2809 if (pa_format_info_is_compatible(finfo_device, f)) {
2815 pa_idxset_free(formats, (pa_free_cb_t) pa_format_info_free);
2821 /* Called from the main thread */
2822 /* Calculates the intersection between formats supported by the source and
2823 * in_formats, and returns these, in the order of the source's formats. */
2824 pa_idxset* pa_source_check_formats(pa_source *s, pa_idxset *in_formats) {
2825 pa_idxset *out_formats = pa_idxset_new(NULL, NULL), *source_formats = NULL;
2826 pa_format_info *f_source, *f_in;
2831 if (!in_formats || pa_idxset_isempty(in_formats))
2834 source_formats = pa_source_get_formats(s);
2836 PA_IDXSET_FOREACH(f_source, source_formats, i) {
2837 PA_IDXSET_FOREACH(f_in, in_formats, j) {
2838 if (pa_format_info_is_compatible(f_source, f_in))
2839 pa_idxset_put(out_formats, pa_format_info_copy(f_in), NULL);
2845 pa_idxset_free(source_formats, (pa_free_cb_t) pa_format_info_free);
2850 /* Called from the main thread. */
2851 void pa_source_set_reference_volume_direct(pa_source *s, const pa_cvolume *volume) {
2852 pa_cvolume old_volume;
2853 char old_volume_str[PA_CVOLUME_SNPRINT_VERBOSE_MAX];
2854 char new_volume_str[PA_CVOLUME_SNPRINT_VERBOSE_MAX];
2859 old_volume = s->reference_volume;
2861 if (pa_cvolume_equal(volume, &old_volume))
2864 s->reference_volume = *volume;
2865 pa_log_debug("The reference volume of source %s changed from %s to %s.", s->name,
2866 pa_cvolume_snprint_verbose(old_volume_str, sizeof(old_volume_str), &old_volume, &s->channel_map,
2867 s->flags & PA_SOURCE_DECIBEL_VOLUME),
2868 pa_cvolume_snprint_verbose(new_volume_str, sizeof(new_volume_str), volume, &s->channel_map,
2869 s->flags & PA_SOURCE_DECIBEL_VOLUME));
2871 pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
2872 pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_VOLUME_CHANGED], s);