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pulseaudio/src/pulsecore/sink.c

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/***
This file is part of PulseAudio.
Copyright 2004-2006 Lennart Poettering
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <pulse/introspect.h>
#include <pulse/utf8.h>
#include <pulse/xmalloc.h>
#include <pulse/timeval.h>
#include <pulsecore/sink-input.h>
#include <pulsecore/namereg.h>
#include <pulsecore/core-util.h>
#include <pulsecore/sample-util.h>
#include <pulsecore/core-subscribe.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
#include <pulsecore/play-memblockq.h>
#include "sink.h"
#define MAX_MIX_CHANNELS 32
#define MIX_BUFFER_LENGTH (PA_PAGE_SIZE)
#define DEFAULT_MIN_LATENCY (4*PA_USEC_PER_MSEC)
static PA_DEFINE_CHECK_TYPE(pa_sink, pa_msgobject);
static void sink_free(pa_object *s);
pa_sink_new_data* pa_sink_new_data_init(pa_sink_new_data *data) {
pa_assert(data);
memset(data, 0, sizeof(*data));
data->proplist = pa_proplist_new();
return data;
}
void pa_sink_new_data_set_name(pa_sink_new_data *data, const char *name) {
pa_assert(data);
pa_xfree(data->name);
data->name = pa_xstrdup(name);
}
void pa_sink_new_data_set_sample_spec(pa_sink_new_data *data, const pa_sample_spec *spec) {
pa_assert(data);
if ((data->sample_spec_is_set = !!spec))
data->sample_spec = *spec;
}
void pa_sink_new_data_set_channel_map(pa_sink_new_data *data, const pa_channel_map *map) {
pa_assert(data);
if ((data->channel_map_is_set = !!map))
data->channel_map = *map;
}
void pa_sink_new_data_set_volume(pa_sink_new_data *data, const pa_cvolume *volume) {
pa_assert(data);
if ((data->volume_is_set = !!volume))
data->volume = *volume;
}
void pa_sink_new_data_set_muted(pa_sink_new_data *data, pa_bool_t mute) {
pa_assert(data);
data->muted_is_set = TRUE;
data->muted = !!mute;
}
void pa_sink_new_data_done(pa_sink_new_data *data) {
pa_assert(data);
pa_xfree(data->name);
pa_proplist_free(data->proplist);
}
/* Called from main context */
static void reset_callbacks(pa_sink *s) {
pa_assert(s);
s->set_state = NULL;
s->get_volume = NULL;
s->set_volume = NULL;
s->get_mute = NULL;
s->set_mute = NULL;
s->request_rewind = NULL;
s->update_requested_latency = NULL;
}
/* Called from main context */
pa_sink* pa_sink_new(
pa_core *core,
pa_sink_new_data *data,
pa_sink_flags_t flags) {
pa_sink *s;
const char *name;
char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
pa_source_new_data source_data;
const char *dn;
pa_assert(core);
pa_assert(data);
pa_assert(data->name);
s = pa_msgobject_new(pa_sink);
if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SINK, s, data->namereg_fail))) {
pa_xfree(s);
return NULL;
}
pa_sink_new_data_set_name(data, name);
if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SINK_NEW], data) < 0) {
pa_xfree(s);
pa_namereg_unregister(core, name);
return NULL;
}
pa_return_null_if_fail(!data->driver || pa_utf8_valid(data->driver));
pa_return_null_if_fail(data->name && pa_utf8_valid(data->name) && data->name[0]);
pa_return_null_if_fail(data->sample_spec_is_set && pa_sample_spec_valid(&data->sample_spec));
if (!data->channel_map_is_set)
pa_return_null_if_fail(pa_channel_map_init_auto(&data->channel_map, data->sample_spec.channels, PA_CHANNEL_MAP_DEFAULT));
pa_return_null_if_fail(pa_channel_map_valid(&data->channel_map));
pa_return_null_if_fail(data->channel_map.channels == data->sample_spec.channels);
if (!data->volume_is_set)
pa_cvolume_reset(&data->volume, data->sample_spec.channels);
pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
pa_return_null_if_fail(data->volume.channels == data->sample_spec.channels);
if (!data->muted_is_set)
data->muted = FALSE;
if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SINK_FIXATE], data) < 0) {
pa_xfree(s);
pa_namereg_unregister(core, name);
return NULL;
}
s->parent.parent.free = sink_free;
s->parent.process_msg = pa_sink_process_msg;
s->core = core;
s->state = PA_SINK_INIT;
s->flags = flags;
s->name = pa_xstrdup(name);
s->proplist = pa_proplist_copy(data->proplist);
s->driver = pa_xstrdup(data->driver);
s->module = data->module;
s->sample_spec = data->sample_spec;
s->channel_map = data->channel_map;
s->inputs = pa_idxset_new(NULL, NULL);
s->n_corked = 0;
s->volume = data->volume;
s->muted = data->muted;
s->refresh_volume = s->refresh_muted = FALSE;
reset_callbacks(s);
s->userdata = NULL;
s->asyncmsgq = NULL;
s->rtpoll = NULL;
pa_silence_memchunk_get(
&core->silence_cache,
core->mempool,
&s->silence,
&s->sample_spec,
0);
s->thread_info.inputs = pa_hashmap_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
pa_cvolume_reset(&s->thread_info.soft_volume, s->sample_spec.channels);
s->thread_info.soft_muted = FALSE;
s->thread_info.state = s->state;
s->thread_info.rewind_nbytes = 0;
s->thread_info.rewind_requested = FALSE;
s->thread_info.max_rewind = 0;
s->thread_info.max_request = 0;
s->thread_info.requested_latency_valid = FALSE;
s->thread_info.requested_latency = 0;
s->thread_info.min_latency = DEFAULT_MIN_LATENCY;
s->thread_info.max_latency = 0;
pa_assert_se(pa_idxset_put(core->sinks, s, &s->index) >= 0);
pa_log_info("Created sink %u \"%s\" with sample spec %s and channel map %s",
s->index,
s->name,
pa_sample_spec_snprint(st, sizeof(st), &s->sample_spec),
pa_channel_map_snprint(cm, sizeof(cm), &s->channel_map));
pa_source_new_data_init(&source_data);
pa_source_new_data_set_sample_spec(&source_data, &s->sample_spec);
pa_source_new_data_set_channel_map(&source_data, &s->channel_map);
source_data.name = pa_sprintf_malloc("%s.monitor", name);
source_data.driver = data->driver;
source_data.module = data->module;
dn = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
pa_proplist_setf(source_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Monitor of %s", dn ? dn : s->name);
pa_proplist_sets(source_data.proplist, PA_PROP_DEVICE_CLASS, "monitor");
s->monitor_source = pa_source_new(core, &source_data, 0);
pa_source_new_data_done(&source_data);
if (!s->monitor_source) {
pa_sink_unlink(s);
pa_sink_unref(s);
return NULL;
}
s->monitor_source->monitor_of = s;
pa_source_set_latency_range(s->monitor_source, s->thread_info.min_latency, s->thread_info.max_latency);
pa_source_set_max_rewind(s->monitor_source, s->thread_info.max_rewind);
return s;
}
/* Called from main context */
static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
int ret;
pa_bool_t suspend_change;
pa_sink_state_t original_state;
pa_assert(s);
if (s->state == state)
return 0;
original_state = s->state;
suspend_change =
(original_state == PA_SINK_SUSPENDED && PA_SINK_IS_OPENED(state)) ||
(PA_SINK_IS_OPENED(original_state) && state == PA_SINK_SUSPENDED);
if (s->set_state)
if ((ret = s->set_state(s, state)) < 0)
return ret;
if (s->asyncmsgq)
if ((ret = pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_STATE, PA_UINT_TO_PTR(state), 0, NULL)) < 0) {
if (s->set_state)
s->set_state(s, original_state);
return ret;
}
s->state = state;
if (suspend_change) {
pa_sink_input *i;
uint32_t idx;
/* We're suspending or resuming, tell everyone about it */
for (i = PA_SINK_INPUT(pa_idxset_first(s->inputs, &idx)); i; i = PA_SINK_INPUT(pa_idxset_next(s->inputs, &idx)))
if (i->suspend)
i->suspend(i, state == PA_SINK_SUSPENDED);
}
if (state != PA_SINK_UNLINKED) /* if we enter UNLINKED state pa_sink_unlink() will fire the apropriate events */
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_STATE_CHANGED], s);
return 0;
}
/* Called from main context */
void pa_sink_put(pa_sink* s) {
pa_sink_assert_ref(s);
pa_assert(s->state == PA_SINK_INIT);
/* The following fields must be initialized properly when calling _put() */
pa_assert(s->asyncmsgq);
pa_assert(s->rtpoll);
pa_assert(!s->thread_info.min_latency || !s->thread_info.max_latency ||
s->thread_info.min_latency <= s->thread_info.max_latency);
if (!(s->flags & PA_SINK_HW_VOLUME_CTRL)) {
s->flags |= PA_SINK_DECIBEL_VOLUME;
s->thread_info.soft_volume = s->volume;
s->thread_info.soft_muted = s->muted;
}
pa_assert_se(sink_set_state(s, PA_SINK_IDLE) == 0);
pa_source_put(s->monitor_source);
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_NEW, s->index);
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_PUT], s);
}
/* Called from main context */
void pa_sink_unlink(pa_sink* s) {
pa_bool_t linked;
pa_sink_input *i, *j = NULL;
pa_assert(s);
/* Please note that pa_sink_unlink() does more than simply
* reversing pa_sink_put(). It also undoes the registrations
* already done in pa_sink_new()! */
/* All operations here shall be idempotent, i.e. pa_sink_unlink()
* may be called multiple times on the same sink without bad
* effects. */
linked = PA_SINK_IS_LINKED(s->state);
if (linked)
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_UNLINK], s);
if (s->state != PA_SINK_UNLINKED)
pa_namereg_unregister(s->core, s->name);
pa_idxset_remove_by_data(s->core->sinks, s, NULL);
while ((i = pa_idxset_first(s->inputs, NULL))) {
pa_assert(i != j);
pa_sink_input_kill(i);
j = i;
}
if (linked)
sink_set_state(s, PA_SINK_UNLINKED);
else
s->state = PA_SINK_UNLINKED;
reset_callbacks(s);
if (s->monitor_source)
pa_source_unlink(s->monitor_source);
if (linked) {
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_UNLINK_POST], s);
}
}
/* Called from main context */
static void sink_free(pa_object *o) {
pa_sink *s = PA_SINK(o);
pa_sink_input *i;
pa_assert(s);
pa_assert(pa_sink_refcnt(s) == 0);
if (PA_SINK_IS_LINKED(s->state))
pa_sink_unlink(s);
pa_log_info("Freeing sink %u \"%s\"", s->index, s->name);
if (s->monitor_source) {
pa_source_unref(s->monitor_source);
s->monitor_source = NULL;
}
pa_idxset_free(s->inputs, NULL, NULL);
while ((i = pa_hashmap_steal_first(s->thread_info.inputs)))
pa_sink_input_unref(i);
pa_hashmap_free(s->thread_info.inputs, NULL, NULL);
if (s->silence.memblock)
pa_memblock_unref(s->silence.memblock);
pa_xfree(s->name);
pa_xfree(s->driver);
if (s->proplist)
pa_proplist_free(s->proplist);
pa_xfree(s);
}
/* Called from main context */
void pa_sink_set_asyncmsgq(pa_sink *s, pa_asyncmsgq *q) {
pa_sink_assert_ref(s);
s->asyncmsgq = q;
if (s->monitor_source)
pa_source_set_asyncmsgq(s->monitor_source, q);
}
/* Called from main context */
void pa_sink_set_rtpoll(pa_sink *s, pa_rtpoll *p) {
pa_sink_assert_ref(s);
s->rtpoll = p;
if (s->monitor_source)
pa_source_set_rtpoll(s->monitor_source, p);
}
/* Called from main context */
int pa_sink_update_status(pa_sink*s) {
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
if (s->state == PA_SINK_SUSPENDED)
return 0;
return sink_set_state(s, pa_sink_used_by(s) ? PA_SINK_RUNNING : PA_SINK_IDLE);
}
/* Called from main context */
int pa_sink_suspend(pa_sink *s, pa_bool_t suspend) {
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
if (suspend)
return sink_set_state(s, PA_SINK_SUSPENDED);
else
return sink_set_state(s, pa_sink_used_by(s) ? PA_SINK_RUNNING : PA_SINK_IDLE);
}
/* Called from IO thread context */
void pa_sink_process_rewind(pa_sink *s, size_t nbytes) {
pa_sink_input *i;
void *state = NULL;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
s->thread_info.rewind_nbytes = 0;
s->thread_info.rewind_requested = FALSE;
if (nbytes > 0)
pa_log_debug("Processing rewind...");
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL))) {
pa_sink_input_assert_ref(i);
pa_sink_input_process_rewind(i, nbytes);
}
if (nbytes > 0)
if (s->monitor_source && PA_SOURCE_IS_OPENED(s->monitor_source->thread_info.state))
pa_source_process_rewind(s->monitor_source, nbytes);
}
/* Called from IO thread context */
static unsigned fill_mix_info(pa_sink *s, size_t *length, pa_mix_info *info, unsigned maxinfo) {
pa_sink_input *i;
unsigned n = 0;
void *state = NULL;
size_t mixlength = *length;
pa_sink_assert_ref(s);
pa_assert(info);
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)) && maxinfo > 0) {
pa_sink_input_assert_ref(i);
if (pa_sink_input_peek(i, *length, &info->chunk, &info->volume) < 0)
continue;
if (mixlength == 0 || info->chunk.length < mixlength)
mixlength = info->chunk.length;
if (pa_memblock_is_silence(info->chunk.memblock)) {
pa_memblock_unref(info->chunk.memblock);
continue;
}
info->userdata = pa_sink_input_ref(i);
pa_assert(info->chunk.memblock);
pa_assert(info->chunk.length > 0);
info++;
n++;
maxinfo--;
}
if (mixlength > 0)
*length = mixlength;
return n;
}
/* Called from IO thread context */
static void inputs_drop(pa_sink *s, pa_mix_info *info, unsigned n, pa_memchunk *result) {
pa_sink_input *i;
void *state = NULL;
unsigned p = 0;
unsigned n_unreffed = 0;
pa_sink_assert_ref(s);
pa_assert(result);
pa_assert(result->memblock);
pa_assert(result->length > 0);
/* We optimize for the case where the order of the inputs has not changed */
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL))) {
unsigned j;
pa_mix_info* m = NULL;
pa_sink_input_assert_ref(i);
/* Let's try to find the matching entry info the pa_mix_info array */
for (j = 0; j < n; j ++) {
if (info[p].userdata == i) {
m = info + p;
break;
}
p++;
if (p >= n)
p = 0;
}
/* Drop read data */
pa_sink_input_drop(i, result->length);
if (s->monitor_source && PA_SOURCE_IS_OPENED(pa_source_get_state(s->monitor_source))) {
if (pa_hashmap_size(i->thread_info.direct_outputs) > 0) {
void *ostate = NULL;
pa_source_output *o;
pa_memchunk c;
if (m && m->chunk.memblock) {
c = m->chunk;
pa_memblock_ref(c.memblock);
pa_assert(result->length <= c.length);
c.length = result->length;
pa_memchunk_make_writable(&c, 0);
pa_volume_memchunk(&c, &s->sample_spec, &m->volume);
} else {
c = s->silence;
pa_memblock_ref(c.memblock);
pa_assert(result->length <= c.length);
c.length = result->length;
}
while ((o = pa_hashmap_iterate(i->thread_info.direct_outputs, &ostate, NULL))) {
pa_source_output_assert_ref(o);
pa_assert(o->direct_on_input == i);
pa_source_post_direct(s->monitor_source, o, &c);
}
pa_memblock_unref(c.memblock);
}
}
if (m) {
if (m->chunk.memblock)
pa_memblock_unref(m->chunk.memblock);
pa_memchunk_reset(&m->chunk);
pa_sink_input_unref(m->userdata);
m->userdata = NULL;
n_unreffed += 1;
}
}
/* Now drop references to entries that are included in the
* pa_mix_info array but don't exist anymore */
if (n_unreffed < n) {
for (; n > 0; info++, n--) {
if (info->userdata)
pa_sink_input_unref(info->userdata);
if (info->chunk.memblock)
pa_memblock_unref(info->chunk.memblock);
}
}
if (s->monitor_source && PA_SOURCE_IS_OPENED(pa_source_get_state(s->monitor_source)))
pa_source_post(s->monitor_source, result);
}
/* Called from IO thread context */
void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result) {
pa_mix_info info[MAX_MIX_CHANNELS];
unsigned n;
size_t block_size_max;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_OPENED(s->thread_info.state));
pa_assert(pa_frame_aligned(length, &s->sample_spec));
pa_assert(result);
pa_sink_ref(s);
pa_assert(!s->thread_info.rewind_requested);
pa_assert(s->thread_info.rewind_nbytes == 0);
if (length <= 0)
length = pa_frame_align(MIX_BUFFER_LENGTH, &s->sample_spec);
block_size_max = pa_mempool_block_size_max(s->core->mempool);
if (length > block_size_max)
length = pa_frame_align(block_size_max, &s->sample_spec);
pa_assert(length > 0);
n = s->thread_info.state == PA_SINK_RUNNING ? fill_mix_info(s, &length, info, MAX_MIX_CHANNELS) : 0;
if (n == 0) {
*result = s->silence;
pa_memblock_ref(result->memblock);
if (result->length > length)
result->length = length;
} else if (n == 1) {
pa_cvolume volume;
*result = info[0].chunk;
pa_memblock_ref(result->memblock);
if (result->length > length)
result->length = length;
pa_sw_cvolume_multiply(&volume, &s->thread_info.soft_volume, &info[0].volume);
if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&volume)) {
pa_memchunk_make_writable(result, 0);
if (s->thread_info.soft_muted || pa_cvolume_is_muted(&volume))
pa_silence_memchunk(result, &s->sample_spec);
else
pa_volume_memchunk(result, &s->sample_spec, &volume);
}
} else {
void *ptr;
result->memblock = pa_memblock_new(s->core->mempool, length);
ptr = pa_memblock_acquire(result->memblock);
result->length = pa_mix(info, n,
ptr, length,
&s->sample_spec,
&s->thread_info.soft_volume,
s->thread_info.soft_muted);
pa_memblock_release(result->memblock);
result->index = 0;
}
if (s->thread_info.state == PA_SINK_RUNNING)
inputs_drop(s, info, n, result);
pa_sink_unref(s);
}
/* Called from IO thread context */
void pa_sink_render_into(pa_sink*s, pa_memchunk *target) {
pa_mix_info info[MAX_MIX_CHANNELS];
unsigned n;
size_t length, block_size_max;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_OPENED(s->thread_info.state));
pa_assert(target);
pa_assert(target->memblock);
pa_assert(target->length > 0);
pa_assert(pa_frame_aligned(target->length, &s->sample_spec));
pa_sink_ref(s);
pa_assert(!s->thread_info.rewind_requested);
pa_assert(s->thread_info.rewind_nbytes == 0);
length = target->length;
block_size_max = pa_mempool_block_size_max(s->core->mempool);
if (length > block_size_max)
length = pa_frame_align(block_size_max, &s->sample_spec);
pa_assert(length > 0);
n = s->thread_info.state == PA_SINK_RUNNING ? fill_mix_info(s, &length, info, MAX_MIX_CHANNELS) : 0;
if (n == 0) {
if (target->length > length)
target->length = length;
pa_silence_memchunk(target, &s->sample_spec);
} else if (n == 1) {
pa_cvolume volume;
if (target->length > length)
target->length = length;
pa_sw_cvolume_multiply(&volume, &s->thread_info.soft_volume, &info[0].volume);
if (s->thread_info.soft_muted || pa_cvolume_is_muted(&volume))
pa_silence_memchunk(target, &s->sample_spec);
else {
pa_memchunk vchunk;
vchunk = info[0].chunk;
pa_memblock_ref(vchunk.memblock);
if (vchunk.length > length)
vchunk.length = length;
if (!pa_cvolume_is_norm(&volume)) {
pa_memchunk_make_writable(&vchunk, 0);
pa_volume_memchunk(&vchunk, &s->sample_spec, &volume);
}
pa_memchunk_memcpy(target, &vchunk);
pa_memblock_unref(vchunk.memblock);
}
} else {
void *ptr;
ptr = pa_memblock_acquire(target->memblock);
target->length = pa_mix(info, n,
(uint8_t*) ptr + target->index, length,
&s->sample_spec,
&s->thread_info.soft_volume,
s->thread_info.soft_muted);
pa_memblock_release(target->memblock);
}
if (s->thread_info.state == PA_SINK_RUNNING)
inputs_drop(s, info, n, target);
pa_sink_unref(s);
}
/* Called from IO thread context */
void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target) {
pa_memchunk chunk;
size_t l, d;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_OPENED(s->thread_info.state));
pa_assert(target);
pa_assert(target->memblock);
pa_assert(target->length > 0);
pa_assert(pa_frame_aligned(target->length, &s->sample_spec));
pa_sink_ref(s);
pa_assert(!s->thread_info.rewind_requested);
pa_assert(s->thread_info.rewind_nbytes == 0);
l = target->length;
d = 0;
while (l > 0) {
chunk = *target;
chunk.index += d;
chunk.length -= d;
pa_sink_render_into(s, &chunk);
d += chunk.length;
l -= chunk.length;
}
pa_sink_unref(s);
}
/* Called from IO thread context */
void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result) {
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_OPENED(s->thread_info.state));
pa_assert(length > 0);
pa_assert(pa_frame_aligned(length, &s->sample_spec));
pa_assert(result);
pa_assert(!s->thread_info.rewind_requested);
pa_assert(s->thread_info.rewind_nbytes == 0);
/*** This needs optimization ***/
result->index = 0;
result->length = length;
result->memblock = pa_memblock_new(s->core->mempool, length);
pa_sink_render_into_full(s, result);
}
/* Called from main thread */
pa_usec_t pa_sink_get_latency(pa_sink *s) {
pa_usec_t usec = 0;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
/* The returned value is supposed to be in the time domain of the sound card! */
if (!PA_SINK_IS_OPENED(s->state))
return 0;
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
return usec;
}
/* Called from main thread */
void pa_sink_set_volume(pa_sink *s, const pa_cvolume *volume) {
pa_bool_t changed;
pa_sink_set_volume_data data;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
pa_assert(volume);
pa_assert(pa_cvolume_valid(volume));
pa_assert(pa_cvolume_compatible(volume, &s->sample_spec));
data.sink = s;
data.volume = *volume;
changed = !pa_cvolume_equal(&data.volume, &s->volume);
if (changed) {
if (pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_SET_VOLUME], &data) < 0)
return;
changed = !pa_cvolume_equal(&data.volume, &s->volume);
}
s->volume = data.volume;
if (s->set_volume && s->set_volume(s) < 0)
s->set_volume = NULL;
if (!s->set_volume)
pa_sink_set_soft_volume(s, volume);
if (changed)
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
/* Called from main thread */
void pa_sink_set_soft_volume(pa_sink *s, const pa_cvolume *volume) {
pa_sink_assert_ref(s);
pa_assert(volume);
if (PA_SINK_IS_LINKED(s->state))
pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_VOLUME, volume, 0, NULL);
else
s->thread_info.soft_volume = *volume;
}
/* Called from main thread */
const pa_cvolume *pa_sink_get_volume(pa_sink *s, pa_bool_t force_refresh) {
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
if (s->refresh_volume || force_refresh) {
struct pa_cvolume old_volume = s->volume;
if (s->get_volume && s->get_volume(s) < 0)
s->get_volume = NULL;
if (!s->get_volume)
pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_VOLUME, &s->volume, 0, NULL);
if (!pa_cvolume_equal(&old_volume, &s->volume))
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
return &s->volume;
}
/* Called from main thread */
void pa_sink_set_mute(pa_sink *s, pa_bool_t mute) {
pa_bool_t changed;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
changed = s->muted != mute;
s->muted = mute;
if (s->set_mute && s->set_mute(s) < 0)
s->set_mute = NULL;
if (!s->set_mute)
pa_asyncmsgq_post(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_MUTE, PA_UINT_TO_PTR(mute), 0, NULL, NULL);
if (changed)
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
/* Called from main thread */
pa_bool_t pa_sink_get_mute(pa_sink *s, pa_bool_t force_refresh) {
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
if (s->refresh_muted || force_refresh) {
pa_bool_t old_muted = s->muted;
if (s->get_mute && s->get_mute(s) < 0)
s->get_mute = NULL;
if (!s->get_mute)
pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_MUTE, &s->muted, 0, NULL);
if (old_muted != s->muted)
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
return s->muted;
}
/* Called from main thread */
void pa_sink_set_description(pa_sink *s, const char *description) {
const char *old;
pa_sink_assert_ref(s);
if (!description && !pa_proplist_contains(s->proplist, PA_PROP_DEVICE_DESCRIPTION))
return;
old = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
if (old && description && !strcmp(old, description))
return;
if (description)
pa_proplist_sets(s->proplist, PA_PROP_DEVICE_DESCRIPTION, description);
else
pa_proplist_unset(s->proplist, PA_PROP_DEVICE_DESCRIPTION);
if (s->monitor_source) {
char *n;
n = pa_sprintf_malloc("Monitor Source of %s", description ? description : s->name);
pa_source_set_description(s->monitor_source, n);
pa_xfree(n);
}
if (PA_SINK_IS_LINKED(s->state)) {
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SINK|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SINK_PROPLIST_CHANGED], s);
}
}
/* Called from main thread */
unsigned pa_sink_linked_by(pa_sink *s) {
unsigned ret;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
ret = pa_idxset_size(s->inputs);
/* We add in the number of streams connected to us here. Please
* not the asymmmetry to pa_sink_used_by()! */
if (s->monitor_source)
ret += pa_source_linked_by(s->monitor_source);
return ret;
}
/* Called from main thread */
unsigned pa_sink_used_by(pa_sink *s) {
unsigned ret;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
ret = pa_idxset_size(s->inputs);
pa_assert(ret >= s->n_corked);
/* Streams connected to our monitor source do not matter for
* pa_sink_used_by()!.*/
return ret - s->n_corked;
}
/* Called from IO thread, except when it is not */
int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
pa_sink *s = PA_SINK(o);
pa_sink_assert_ref(s);
switch ((pa_sink_message_t) code) {
case PA_SINK_MESSAGE_ADD_INPUT: {
pa_sink_input *i = PA_SINK_INPUT(userdata);
/* If you change anything here, make sure to change the
* sink input handling a few lines down at
* PA_SINK_MESSAGE_FINISH_MOVE, too. */
pa_hashmap_put(s->thread_info.inputs, PA_UINT32_TO_PTR(i->index), pa_sink_input_ref(i));
/* Since the caller sleeps in pa_sink_input_put(), we can
* safely access data outside of thread_info even though
* it is mutable */
if ((i->thread_info.sync_prev = i->sync_prev)) {
pa_assert(i->sink == i->thread_info.sync_prev->sink);
pa_assert(i->sync_prev->sync_next == i);
i->thread_info.sync_prev->thread_info.sync_next = i;
}
if ((i->thread_info.sync_next = i->sync_next)) {
pa_assert(i->sink == i->thread_info.sync_next->sink);
pa_assert(i->sync_next->sync_prev == i);
i->thread_info.sync_next->thread_info.sync_prev = i;
}
pa_assert(!i->thread_info.attached);
i->thread_info.attached = TRUE;
if (i->attach)
i->attach(i);
pa_sink_input_set_state_within_thread(i, i->state);
/* The requested latency of the sink input needs to be
* fixed up and then configured on the sink */
if (i->thread_info.requested_sink_latency != (pa_usec_t) -1)
pa_sink_input_set_requested_latency_within_thread(i, i->thread_info.requested_sink_latency);
pa_sink_input_update_max_rewind(i, s->thread_info.max_rewind);
pa_sink_input_update_max_request(i, s->thread_info.max_request);
/* We don't rewind here automatically. This is left to the
* sink input implementor because some sink inputs need a
* slow start, i.e. need some time to buffer client
* samples before beginning streaming. */
return 0;
}
case PA_SINK_MESSAGE_REMOVE_INPUT: {
pa_sink_input *i = PA_SINK_INPUT(userdata);
/* If you change anything here, make sure to change the
* sink input handling a few lines down at
* PA_SINK_MESSAGE_PREPAPRE_MOVE, too. */
if (i->detach)
i->detach(i);
pa_sink_input_set_state_within_thread(i, i->state);
pa_assert(i->thread_info.attached);
i->thread_info.attached = FALSE;
/* Since the caller sleeps in pa_sink_input_unlink(),
* we can safely access data outside of thread_info even
* though it is mutable */
pa_assert(!i->sync_prev);
pa_assert(!i->sync_next);
if (i->thread_info.sync_prev) {
i->thread_info.sync_prev->thread_info.sync_next = i->thread_info.sync_prev->sync_next;
i->thread_info.sync_prev = NULL;
}
if (i->thread_info.sync_next) {
i->thread_info.sync_next->thread_info.sync_prev = i->thread_info.sync_next->sync_prev;
i->thread_info.sync_next = NULL;
}
if (pa_hashmap_remove(s->thread_info.inputs, PA_UINT32_TO_PTR(i->index)))
pa_sink_input_unref(i);
pa_sink_invalidate_requested_latency(s);
pa_sink_request_rewind(s, (size_t) -1);
return 0;
}
case PA_SINK_MESSAGE_START_MOVE: {
pa_sink_input *i = PA_SINK_INPUT(userdata);
/* We don't support moving synchronized streams. */
pa_assert(!i->sync_prev);
pa_assert(!i->sync_next);
pa_assert(!i->thread_info.sync_next);
pa_assert(!i->thread_info.sync_prev);
if (i->thread_info.state != PA_SINK_INPUT_CORKED) {
pa_usec_t usec = 0;
size_t sink_nbytes, total_nbytes;
/* Get the latency of the sink */
if (PA_MSGOBJECT(s)->process_msg(PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
usec = 0;
sink_nbytes = pa_usec_to_bytes(usec, &s->sample_spec);
total_nbytes = sink_nbytes + pa_memblockq_get_length(i->thread_info.render_memblockq);
if (total_nbytes > 0) {
i->thread_info.rewrite_nbytes = i->thread_info.resampler ? pa_resampler_request(i->thread_info.resampler, total_nbytes) : total_nbytes;
i->thread_info.rewrite_flush = TRUE;
pa_sink_input_process_rewind(i, sink_nbytes);
}
}
if (i->detach)
i->detach(i);
pa_assert(i->thread_info.attached);
i->thread_info.attached = FALSE;
/* Let's remove the sink input ...*/
if (pa_hashmap_remove(s->thread_info.inputs, PA_UINT32_TO_PTR(i->index)))
pa_sink_input_unref(i);
pa_sink_invalidate_requested_latency(s);
pa_log_debug("Requesting rewind due to started move");
pa_sink_request_rewind(s, (size_t) -1);
return 0;
}
case PA_SINK_MESSAGE_FINISH_MOVE: {
pa_sink_input *i = PA_SINK_INPUT(userdata);
/* We don't support moving synchronized streams. */
pa_assert(!i->sync_prev);
pa_assert(!i->sync_next);
pa_assert(!i->thread_info.sync_next);
pa_assert(!i->thread_info.sync_prev);
pa_hashmap_put(s->thread_info.inputs, PA_UINT32_TO_PTR(i->index), pa_sink_input_ref(i));
pa_assert(!i->thread_info.attached);
i->thread_info.attached = TRUE;
if (i->attach)
i->attach(i);
if (i->thread_info.requested_sink_latency != (pa_usec_t) -1)
pa_sink_input_set_requested_latency_within_thread(i, i->thread_info.requested_sink_latency);
pa_sink_input_update_max_rewind(i, s->thread_info.max_rewind);
pa_sink_input_update_max_request(i, s->thread_info.max_request);
if (i->thread_info.state != PA_SINK_INPUT_CORKED) {
pa_usec_t usec = 0;
size_t nbytes;
/* Get the latency of the sink */
if (PA_MSGOBJECT(s)->process_msg(PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
usec = 0;
nbytes = pa_usec_to_bytes(usec, &s->sample_spec);
if (nbytes > 0)
pa_sink_input_drop(i, nbytes);
pa_log_debug("Requesting rewind due to finished move");
pa_sink_request_rewind(s, nbytes);
}
return 0;
}
case PA_SINK_MESSAGE_SET_VOLUME:
s->thread_info.soft_volume = *((pa_cvolume*) userdata);
pa_sink_request_rewind(s, (size_t) -1);
return 0;
case PA_SINK_MESSAGE_SET_MUTE:
s->thread_info.soft_muted = PA_PTR_TO_UINT(userdata);
pa_sink_request_rewind(s, (size_t) -1);
return 0;
case PA_SINK_MESSAGE_GET_VOLUME:
*((pa_cvolume*) userdata) = s->thread_info.soft_volume;
return 0;
case PA_SINK_MESSAGE_GET_MUTE:
*((pa_bool_t*) userdata) = s->thread_info.soft_muted;
return 0;
case PA_SINK_MESSAGE_SET_STATE:
s->thread_info.state = PA_PTR_TO_UINT(userdata);
return 0;
case PA_SINK_MESSAGE_DETACH:
/* Detach all streams */
pa_sink_detach_within_thread(s);
return 0;
case PA_SINK_MESSAGE_ATTACH:
/* Reattach all streams */
pa_sink_attach_within_thread(s);
return 0;
case PA_SINK_MESSAGE_GET_REQUESTED_LATENCY: {
pa_usec_t *usec = userdata;
*usec = pa_sink_get_requested_latency_within_thread(s);
if (*usec == (pa_usec_t) -1)
*usec = s->thread_info.max_latency;
return 0;
}
case PA_SINK_MESSAGE_SET_LATENCY_RANGE: {
pa_usec_t *r = userdata;
pa_sink_update_latency_range(s, r[0], r[1]);
return 0;
}
case PA_SINK_MESSAGE_GET_LATENCY_RANGE: {
pa_usec_t *r = userdata;
r[0] = s->thread_info.min_latency;
r[1] = s->thread_info.max_latency;
return 0;
}
case PA_SINK_MESSAGE_GET_MAX_REWIND:
*((size_t*) userdata) = s->thread_info.max_rewind;
return 0;
case PA_SINK_MESSAGE_GET_MAX_REQUEST:
*((size_t*) userdata) = s->thread_info.max_request;
return 0;
case PA_SINK_MESSAGE_GET_LATENCY:
case PA_SINK_MESSAGE_MAX:
;
}
return -1;
}
/* Called from main thread */
int pa_sink_suspend_all(pa_core *c, pa_bool_t suspend) {
pa_sink *sink;
uint32_t idx;
int ret = 0;
pa_core_assert_ref(c);
for (sink = PA_SINK(pa_idxset_first(c->sinks, &idx)); sink; sink = PA_SINK(pa_idxset_next(c->sinks, &idx)))
ret -= pa_sink_suspend(sink, suspend) < 0;
return ret;
}
/* Called from main thread */
void pa_sink_detach(pa_sink *s) {
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_DETACH, NULL, 0, NULL) == 0);
}
/* Called from main thread */
void pa_sink_attach(pa_sink *s) {
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_ATTACH, NULL, 0, NULL) == 0);
}
/* Called from IO thread */
void pa_sink_detach_within_thread(pa_sink *s) {
pa_sink_input *i;
void *state = NULL;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
if (i->detach)
i->detach(i);
if (s->monitor_source)
pa_source_detach_within_thread(s->monitor_source);
}
/* Called from IO thread */
void pa_sink_attach_within_thread(pa_sink *s) {
pa_sink_input *i;
void *state = NULL;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
if (i->attach)
i->attach(i);
if (s->monitor_source)
pa_source_attach_within_thread(s->monitor_source);
}
/* Called from IO thread */
void pa_sink_request_rewind(pa_sink*s, size_t nbytes) {
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->thread_info.state));
if (nbytes == (size_t) -1)
nbytes = s->thread_info.max_rewind;
nbytes = PA_MIN(nbytes, s->thread_info.max_rewind);
if (s->thread_info.rewind_requested &&
nbytes <= s->thread_info.rewind_nbytes)
return;
s->thread_info.rewind_nbytes = nbytes;
s->thread_info.rewind_requested = TRUE;
if (s->request_rewind)
s->request_rewind(s);
}
/* Called from IO thread */
pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s) {
pa_usec_t result = (pa_usec_t) -1;
pa_sink_input *i;
void *state = NULL;
pa_usec_t monitor_latency;
pa_sink_assert_ref(s);
if (s->thread_info.requested_latency_valid)
return s->thread_info.requested_latency;
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
if (i->thread_info.requested_sink_latency != (pa_usec_t) -1 &&
(result == (pa_usec_t) -1 || result > i->thread_info.requested_sink_latency))
result = i->thread_info.requested_sink_latency;
monitor_latency = pa_source_get_requested_latency_within_thread(s->monitor_source);
if (monitor_latency != (pa_usec_t) -1 &&
(result == (pa_usec_t) -1 || result > monitor_latency))
result = monitor_latency;
if (result != (pa_usec_t) -1) {
if (s->thread_info.max_latency > 0 && result > s->thread_info.max_latency)
result = s->thread_info.max_latency;
if (s->thread_info.min_latency > 0 && result < s->thread_info.min_latency)
result = s->thread_info.min_latency;
}
s->thread_info.requested_latency = result;
s->thread_info.requested_latency_valid = TRUE;
return result;
}
/* Called from main thread */
pa_usec_t pa_sink_get_requested_latency(pa_sink *s) {
pa_usec_t usec = 0;
pa_sink_assert_ref(s);
pa_assert(PA_SINK_IS_LINKED(s->state));
if (!PA_SINK_IS_OPENED(s->state))
return 0;
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
return usec;
}
/* Called from IO thread */
void pa_sink_set_max_rewind(pa_sink *s, size_t max_rewind) {
pa_sink_input *i;
void *state = NULL;
pa_sink_assert_ref(s);
if (max_rewind == s->thread_info.max_rewind)
return;
s->thread_info.max_rewind = max_rewind;
if (PA_SINK_IS_LINKED(s->thread_info.state)) {
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
pa_sink_input_update_max_rewind(i, s->thread_info.max_rewind);
}
if (s->monitor_source)
pa_source_set_max_rewind(s->monitor_source, s->thread_info.max_rewind);
}
/* Called from IO thread */
void pa_sink_set_max_request(pa_sink *s, size_t max_request) {
void *state = NULL;
pa_sink_assert_ref(s);
if (max_request == s->thread_info.max_request)
return;
s->thread_info.max_request = max_request;
if (PA_SINK_IS_LINKED(s->thread_info.state)) {
pa_sink_input *i;
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
pa_sink_input_update_max_request(i, s->thread_info.max_request);
}
}
/* Called from IO thread */
void pa_sink_invalidate_requested_latency(pa_sink *s) {
pa_sink_input *i;
void *state = NULL;
pa_sink_assert_ref(s);
s->thread_info.requested_latency_valid = FALSE;
if (s->update_requested_latency)
s->update_requested_latency(s);
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
if (i->update_sink_requested_latency)
i->update_sink_requested_latency(i);
}
/* Called from main thread */
void pa_sink_set_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency) {
pa_sink_assert_ref(s);
/* min_latency == 0: no limit
* min_latency == (size_t) -1: default limit
* min_latency anything else: specified limit
*
* Similar for max_latency */
if (min_latency == (pa_usec_t) -1)
min_latency = DEFAULT_MIN_LATENCY;
if (max_latency == (pa_usec_t) -1)
max_latency = min_latency;
pa_assert(!min_latency || !max_latency ||
min_latency <= max_latency);
if (PA_SINK_IS_LINKED(s->state)) {
pa_usec_t r[2];
r[0] = min_latency;
r[1] = max_latency;
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
} else {
s->thread_info.min_latency = min_latency;
s->thread_info.max_latency = max_latency;
s->monitor_source->thread_info.min_latency = min_latency;
s->monitor_source->thread_info.max_latency = max_latency;
s->thread_info.requested_latency_valid = s->monitor_source->thread_info.requested_latency_valid = FALSE;
}
}
/* Called from main thread */
void pa_sink_get_latency_range(pa_sink *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
pa_sink_assert_ref(s);
pa_assert(min_latency);
pa_assert(max_latency);
if (PA_SINK_IS_LINKED(s->state)) {
pa_usec_t r[2] = { 0, 0 };
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_LATENCY_RANGE, r, 0, NULL) == 0);
*min_latency = r[0];
*max_latency = r[1];
} else {
*min_latency = s->thread_info.min_latency;
*max_latency = s->thread_info.max_latency;
}
}
/* Called from IO thread */
void pa_sink_update_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency) {
pa_sink_input *i;
void *state = NULL;
pa_sink_assert_ref(s);
s->thread_info.min_latency = min_latency;
s->thread_info.max_latency = max_latency;
while ((i = pa_hashmap_iterate(s->thread_info.inputs, &state, NULL)))
if (i->update_sink_latency_range)
i->update_sink_latency_range(i);
pa_sink_invalidate_requested_latency(s);
pa_source_update_latency_range(s->monitor_source, min_latency, max_latency);
}
size_t pa_sink_get_max_rewind(pa_sink *s) {
size_t r;
pa_sink_assert_ref(s);
if (!PA_SINK_IS_LINKED(s->state))
return s->thread_info.max_rewind;
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
return r;
}
size_t pa_sink_get_max_request(pa_sink *s) {
size_t r;
pa_sink_assert_ref(s);
if (!PA_SINK_IS_LINKED(s->state))
return s->thread_info.max_request;
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SINK_MESSAGE_GET_MAX_REQUEST, &r, 0, NULL) == 0);
return r;
}
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