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pulseaudio/src/pulsecore/source.c
Arun Raghavan f5f6772364 source: Deal with filter having more channels than the master 
Without this, we hit an assert because the channel count in
new_reference (which was inherited from the master) is lower than the
channel count of the filter.
2015-11-20 17:34:38 +05:30

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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 2.1 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, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <pulse/format.h>
#include <pulse/utf8.h>
#include <pulse/xmalloc.h>
#include <pulse/timeval.h>
#include <pulse/util.h>
#include <pulse/rtclock.h>
#include <pulse/internal.h>
#include <pulsecore/core-util.h>
#include <pulsecore/source-output.h>
#include <pulsecore/namereg.h>
#include <pulsecore/core-subscribe.h>
#include <pulsecore/log.h>
#include <pulsecore/mix.h>
#include <pulsecore/flist.h>
#include "source.h"
#define ABSOLUTE_MIN_LATENCY (500)
#define ABSOLUTE_MAX_LATENCY (10*PA_USEC_PER_SEC)
#define DEFAULT_FIXED_LATENCY (250*PA_USEC_PER_MSEC)
PA_DEFINE_PUBLIC_CLASS(pa_source, pa_msgobject);
struct pa_source_volume_change {
pa_usec_t at;
pa_cvolume hw_volume;
PA_LLIST_FIELDS(pa_source_volume_change);
};
struct source_message_set_port {
pa_device_port *port;
int ret;
};
static void source_free(pa_object *o);
static void pa_source_volume_change_push(pa_source *s);
static void pa_source_volume_change_flush(pa_source *s);
pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data) {
pa_assert(data);
pa_zero(*data);
data->proplist = pa_proplist_new();
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);
return data;
}
void pa_source_new_data_set_name(pa_source_new_data *data, const char *name) {
pa_assert(data);
pa_xfree(data->name);
data->name = pa_xstrdup(name);
}
void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec) {
pa_assert(data);
if ((data->sample_spec_is_set = !!spec))
data->sample_spec = *spec;
}
void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map) {
pa_assert(data);
if ((data->channel_map_is_set = !!map))
data->channel_map = *map;
}
void pa_source_new_data_set_alternate_sample_rate(pa_source_new_data *data, const uint32_t alternate_sample_rate) {
pa_assert(data);
data->alternate_sample_rate_is_set = true;
data->alternate_sample_rate = alternate_sample_rate;
}
void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume) {
pa_assert(data);
if ((data->volume_is_set = !!volume))
data->volume = *volume;
}
void pa_source_new_data_set_muted(pa_source_new_data *data, bool mute) {
pa_assert(data);
data->muted_is_set = true;
data->muted = mute;
}
void pa_source_new_data_set_port(pa_source_new_data *data, const char *port) {
pa_assert(data);
pa_xfree(data->active_port);
data->active_port = pa_xstrdup(port);
}
void pa_source_new_data_done(pa_source_new_data *data) {
pa_assert(data);
pa_proplist_free(data->proplist);
if (data->ports)
pa_hashmap_free(data->ports);
pa_xfree(data->name);
pa_xfree(data->active_port);
}
/* Called from main context */
static void reset_callbacks(pa_source *s) {
pa_assert(s);
s->set_state = NULL;
s->get_volume = NULL;
s->set_volume = NULL;
s->write_volume = NULL;
s->get_mute = NULL;
s->set_mute = NULL;
s->update_requested_latency = NULL;
s->set_port = NULL;
s->get_formats = NULL;
s->update_rate = NULL;
}
/* Called from main context */
pa_source* pa_source_new(
pa_core *core,
pa_source_new_data *data,
pa_source_flags_t flags) {
pa_source *s;
const char *name;
char st[PA_SAMPLE_SPEC_SNPRINT_MAX], cm[PA_CHANNEL_MAP_SNPRINT_MAX];
char *pt;
pa_assert(core);
pa_assert(data);
pa_assert(data->name);
pa_assert_ctl_context();
s = pa_msgobject_new(pa_source);
if (!(name = pa_namereg_register(core, data->name, PA_NAMEREG_SOURCE, s, data->namereg_fail))) {
pa_log_debug("Failed to register name %s.", data->name);
pa_xfree(s);
return NULL;
}
pa_source_new_data_set_name(data, name);
if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_NEW], data) < 0) {
pa_xfree(s);
pa_namereg_unregister(core, name);
return NULL;
}
/* FIXME, need to free s here on failure */
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);
/* FIXME: There should probably be a general function for checking whether
* the source volume is allowed to be set, like there is for source outputs. */
pa_assert(!data->volume_is_set || !(flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
if (!data->volume_is_set) {
pa_cvolume_reset(&data->volume, data->sample_spec.channels);
data->save_volume = false;
}
pa_return_null_if_fail(pa_cvolume_valid(&data->volume));
pa_return_null_if_fail(pa_cvolume_compatible(&data->volume, &data->sample_spec));
if (!data->muted_is_set)
data->muted = false;
if (data->card)
pa_proplist_update(data->proplist, PA_UPDATE_MERGE, data->card->proplist);
pa_device_init_description(data->proplist, data->card);
pa_device_init_icon(data->proplist, false);
pa_device_init_intended_roles(data->proplist);
if (!data->active_port) {
pa_device_port *p = pa_device_port_find_best(data->ports);
if (p)
pa_source_new_data_set_port(data, p->name);
}
if (pa_hook_fire(&core->hooks[PA_CORE_HOOK_SOURCE_FIXATE], data) < 0) {
pa_xfree(s);
pa_namereg_unregister(core, name);
return NULL;
}
s->parent.parent.free = source_free;
s->parent.process_msg = pa_source_process_msg;
s->core = core;
s->state = PA_SOURCE_INIT;
s->flags = flags;
s->priority = 0;
s->suspend_cause = data->suspend_cause;
pa_source_set_mixer_dirty(s, false);
s->name = pa_xstrdup(name);
s->proplist = pa_proplist_copy(data->proplist);
s->driver = pa_xstrdup(pa_path_get_filename(data->driver));
s->module = data->module;
s->card = data->card;
s->priority = pa_device_init_priority(s->proplist);
s->sample_spec = data->sample_spec;
s->channel_map = data->channel_map;
s->default_sample_rate = s->sample_spec.rate;
if (data->alternate_sample_rate_is_set)
s->alternate_sample_rate = data->alternate_sample_rate;
else
s->alternate_sample_rate = s->core->alternate_sample_rate;
if (s->sample_spec.rate == s->alternate_sample_rate) {
pa_log_warn("Default and alternate sample rates are the same.");
s->alternate_sample_rate = 0;
}
s->outputs = pa_idxset_new(NULL, NULL);
s->n_corked = 0;
s->monitor_of = NULL;
s->output_from_master = NULL;
s->reference_volume = s->real_volume = data->volume;
pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
s->base_volume = PA_VOLUME_NORM;
s->n_volume_steps = PA_VOLUME_NORM+1;
s->muted = data->muted;
s->refresh_volume = s->refresh_muted = false;
reset_callbacks(s);
s->userdata = NULL;
s->asyncmsgq = NULL;
/* As a minor optimization we just steal the list instead of
* copying it here */
s->ports = data->ports;
data->ports = NULL;
s->active_port = NULL;
s->save_port = false;
if (data->active_port)
if ((s->active_port = pa_hashmap_get(s->ports, data->active_port)))
s->save_port = data->save_port;
/* Hopefully the active port has already been assigned in the previous call
to pa_device_port_find_best, but better safe than sorry */
if (!s->active_port)
s->active_port = pa_device_port_find_best(s->ports);
if (s->active_port)
s->latency_offset = s->active_port->latency_offset;
else
s->latency_offset = 0;
s->save_volume = data->save_volume;
s->save_muted = data->save_muted;
pa_silence_memchunk_get(
&core->silence_cache,
core->mempool,
&s->silence,
&s->sample_spec,
0);
s->thread_info.rtpoll = NULL;
s->thread_info.outputs = pa_hashmap_new_full(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func, NULL,
(pa_free_cb_t) pa_source_output_unref);
s->thread_info.soft_volume = s->soft_volume;
s->thread_info.soft_muted = s->muted;
s->thread_info.state = s->state;
s->thread_info.max_rewind = 0;
s->thread_info.requested_latency_valid = false;
s->thread_info.requested_latency = 0;
s->thread_info.min_latency = ABSOLUTE_MIN_LATENCY;
s->thread_info.max_latency = ABSOLUTE_MAX_LATENCY;
s->thread_info.fixed_latency = flags & PA_SOURCE_DYNAMIC_LATENCY ? 0 : DEFAULT_FIXED_LATENCY;
PA_LLIST_HEAD_INIT(pa_source_volume_change, s->thread_info.volume_changes);
s->thread_info.volume_changes_tail = NULL;
pa_sw_cvolume_multiply(&s->thread_info.current_hw_volume, &s->soft_volume, &s->real_volume);
s->thread_info.volume_change_safety_margin = core->deferred_volume_safety_margin_usec;
s->thread_info.volume_change_extra_delay = core->deferred_volume_extra_delay_usec;
s->thread_info.latency_offset = s->latency_offset;
/* FIXME: This should probably be moved to pa_source_put() */
pa_assert_se(pa_idxset_put(core->sources, s, &s->index) >= 0);
if (s->card)
pa_assert_se(pa_idxset_put(s->card->sources, s, NULL) >= 0);
pt = pa_proplist_to_string_sep(s->proplist, "\n ");
pa_log_info("Created source %u \"%s\" with sample spec %s and channel map %s\n %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),
pt);
pa_xfree(pt);
return s;
}
/* Called from main context */
static int source_set_state(pa_source *s, pa_source_state_t state) {
int ret;
bool suspend_change;
pa_source_state_t original_state;
pa_assert(s);
pa_assert_ctl_context();
if (s->state == state)
return 0;
original_state = s->state;
suspend_change =
(original_state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(state)) ||
(PA_SOURCE_IS_OPENED(original_state) && state == PA_SOURCE_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_SOURCE_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 (state != PA_SOURCE_UNLINKED) { /* if we enter UNLINKED state pa_source_unlink() will fire the appropriate events */
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_STATE_CHANGED], s);
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
if (suspend_change) {
pa_source_output *o;
uint32_t idx;
/* We're suspending or resuming, tell everyone about it */
PA_IDXSET_FOREACH(o, s->outputs, idx)
if (s->state == PA_SOURCE_SUSPENDED &&
(o->flags & PA_SOURCE_OUTPUT_KILL_ON_SUSPEND))
pa_source_output_kill(o);
else if (o->suspend)
o->suspend(o, state == PA_SOURCE_SUSPENDED);
}
return 0;
}
void pa_source_set_get_volume_callback(pa_source *s, pa_source_cb_t cb) {
pa_assert(s);
s->get_volume = cb;
}
void pa_source_set_set_volume_callback(pa_source *s, pa_source_cb_t cb) {
pa_source_flags_t flags;
pa_assert(s);
pa_assert(!s->write_volume || cb);
s->set_volume = cb;
/* Save the current flags so we can tell if they've changed */
flags = s->flags;
if (cb) {
/* The source implementor is responsible for setting decibel volume support */
s->flags |= PA_SOURCE_HW_VOLUME_CTRL;
} else {
s->flags &= ~PA_SOURCE_HW_VOLUME_CTRL;
/* See note below in pa_source_put() about volume sharing and decibel volumes */
pa_source_enable_decibel_volume(s, !(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
}
/* If the flags have changed after init, let any clients know via a change event */
if (s->state != PA_SOURCE_INIT && flags != s->flags)
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
void pa_source_set_write_volume_callback(pa_source *s, pa_source_cb_t cb) {
pa_source_flags_t flags;
pa_assert(s);
pa_assert(!cb || s->set_volume);
s->write_volume = cb;
/* Save the current flags so we can tell if they've changed */
flags = s->flags;
if (cb)
s->flags |= PA_SOURCE_DEFERRED_VOLUME;
else
s->flags &= ~PA_SOURCE_DEFERRED_VOLUME;
/* If the flags have changed after init, let any clients know via a change event */
if (s->state != PA_SOURCE_INIT && flags != s->flags)
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
void pa_source_set_get_mute_callback(pa_source *s, pa_source_get_mute_cb_t cb) {
pa_assert(s);
s->get_mute = cb;
}
void pa_source_set_set_mute_callback(pa_source *s, pa_source_cb_t cb) {
pa_source_flags_t flags;
pa_assert(s);
s->set_mute = cb;
/* Save the current flags so we can tell if they've changed */
flags = s->flags;
if (cb)
s->flags |= PA_SOURCE_HW_MUTE_CTRL;
else
s->flags &= ~PA_SOURCE_HW_MUTE_CTRL;
/* If the flags have changed after init, let any clients know via a change event */
if (s->state != PA_SOURCE_INIT && flags != s->flags)
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
static void enable_flat_volume(pa_source *s, bool enable) {
pa_source_flags_t flags;
pa_assert(s);
/* Always follow the overall user preference here */
enable = enable && s->core->flat_volumes;
/* Save the current flags so we can tell if they've changed */
flags = s->flags;
if (enable)
s->flags |= PA_SOURCE_FLAT_VOLUME;
else
s->flags &= ~PA_SOURCE_FLAT_VOLUME;
/* If the flags have changed after init, let any clients know via a change event */
if (s->state != PA_SOURCE_INIT && flags != s->flags)
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
void pa_source_enable_decibel_volume(pa_source *s, bool enable) {
pa_source_flags_t flags;
pa_assert(s);
/* Save the current flags so we can tell if they've changed */
flags = s->flags;
if (enable) {
s->flags |= PA_SOURCE_DECIBEL_VOLUME;
enable_flat_volume(s, true);
} else {
s->flags &= ~PA_SOURCE_DECIBEL_VOLUME;
enable_flat_volume(s, false);
}
/* If the flags have changed after init, let any clients know via a change event */
if (s->state != PA_SOURCE_INIT && flags != s->flags)
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
/* Called from main context */
void pa_source_put(pa_source *s) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(s->state == PA_SOURCE_INIT);
pa_assert(!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER) || pa_source_is_filter(s));
/* The following fields must be initialized properly when calling _put() */
pa_assert(s->asyncmsgq);
pa_assert(s->thread_info.min_latency <= s->thread_info.max_latency);
/* Generally, flags should be initialized via pa_source_new(). As a
* special exception we allow some volume related flags to be set
* between _new() and _put() by the callback setter functions above.
*
* Thus we implement a couple safeguards here which ensure the above
* setters were used (or at least the implementor made manual changes
* in a compatible way).
*
* Note: All of these flags set here can change over the life time
* of the source. */
pa_assert(!(s->flags & PA_SOURCE_HW_VOLUME_CTRL) || s->set_volume);
pa_assert(!(s->flags & PA_SOURCE_DEFERRED_VOLUME) || s->write_volume);
pa_assert(!(s->flags & PA_SOURCE_HW_MUTE_CTRL) || s->set_mute);
/* XXX: Currently decibel volume is disabled for all sources that use volume
* sharing. When the master source supports decibel volume, it would be good
* to have the flag also in the filter source, but currently we don't do that
* so that the flags of the filter source never change when it's moved from
* a master source to another. One solution for this problem would be to
* remove user-visible volume altogether from filter sources when volume
* sharing is used, but the current approach was easier to implement... */
/* We always support decibel volumes in software, otherwise we leave it to
* the source implementor to set this flag as needed.
*
* Note: This flag can also change over the life time of the source. */
if (!(s->flags & PA_SOURCE_HW_VOLUME_CTRL) && !(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
pa_source_enable_decibel_volume(s, true);
s->soft_volume = s->reference_volume;
}
/* If the source implementor support DB volumes by itself, we should always
* try and enable flat volumes too */
if ((s->flags & PA_SOURCE_DECIBEL_VOLUME))
enable_flat_volume(s, true);
if (s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER) {
pa_source *root_source = pa_source_get_master(s);
pa_assert(PA_LIKELY(root_source));
s->reference_volume = root_source->reference_volume;
pa_cvolume_remap(&s->reference_volume, &root_source->channel_map, &s->channel_map);
s->real_volume = root_source->real_volume;
pa_cvolume_remap(&s->real_volume, &root_source->channel_map, &s->channel_map);
} else
/* We assume that if the sink implementor changed the default
* volume he did so in real_volume, because that is the usual
* place where he is supposed to place his changes. */
s->reference_volume = s->real_volume;
s->thread_info.soft_volume = s->soft_volume;
s->thread_info.soft_muted = s->muted;
pa_sw_cvolume_multiply(&s->thread_info.current_hw_volume, &s->soft_volume, &s->real_volume);
pa_assert((s->flags & PA_SOURCE_HW_VOLUME_CTRL)
|| (s->base_volume == PA_VOLUME_NORM
&& ((s->flags & PA_SOURCE_DECIBEL_VOLUME || (s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)))));
pa_assert(!(s->flags & PA_SOURCE_DECIBEL_VOLUME) || s->n_volume_steps == PA_VOLUME_NORM+1);
pa_assert(!(s->flags & PA_SOURCE_DYNAMIC_LATENCY) == !(s->thread_info.fixed_latency == 0));
if (s->suspend_cause)
pa_assert_se(source_set_state(s, PA_SOURCE_SUSPENDED) == 0);
else
pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PUT], s);
}
/* Called from main context */
void pa_source_unlink(pa_source *s) {
bool linked;
pa_source_output *o, PA_UNUSED *j = NULL;
pa_assert(s);
pa_assert_ctl_context();
/* See pa_sink_unlink() for a couple of comments how this function
* works. */
linked = PA_SOURCE_IS_LINKED(s->state);
if (linked)
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], s);
if (s->state != PA_SOURCE_UNLINKED)
pa_namereg_unregister(s->core, s->name);
pa_idxset_remove_by_data(s->core->sources, s, NULL);
if (s->card)
pa_idxset_remove_by_data(s->card->sources, s, NULL);
while ((o = pa_idxset_first(s->outputs, NULL))) {
pa_assert(o != j);
pa_source_output_kill(o);
j = o;
}
if (linked)
source_set_state(s, PA_SOURCE_UNLINKED);
else
s->state = PA_SOURCE_UNLINKED;
reset_callbacks(s);
if (linked) {
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK_POST], s);
}
}
/* Called from main context */
static void source_free(pa_object *o) {
pa_source *s = PA_SOURCE(o);
pa_assert(s);
pa_assert_ctl_context();
pa_assert(pa_source_refcnt(s) == 0);
if (PA_SOURCE_IS_LINKED(s->state))
pa_source_unlink(s);
pa_log_info("Freeing source %u \"%s\"", s->index, s->name);
pa_source_volume_change_flush(s);
pa_idxset_free(s->outputs, NULL);
pa_hashmap_free(s->thread_info.outputs);
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);
if (s->ports)
pa_hashmap_free(s->ports);
pa_xfree(s);
}
/* Called from main context, and not while the IO thread is active, please */
void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
s->asyncmsgq = q;
}
/* Called from main context, and not while the IO thread is active, please */
void pa_source_update_flags(pa_source *s, pa_source_flags_t mask, pa_source_flags_t value) {
pa_source_flags_t old_flags;
pa_source_output *output;
uint32_t idx;
pa_source_assert_ref(s);
pa_assert_ctl_context();
/* For now, allow only a minimal set of flags to be changed. */
pa_assert((mask & ~(PA_SOURCE_DYNAMIC_LATENCY|PA_SOURCE_LATENCY)) == 0);
old_flags = s->flags;
s->flags = (s->flags & ~mask) | (value & mask);
if (s->flags == old_flags)
return;
if ((s->flags & PA_SOURCE_LATENCY) != (old_flags & PA_SOURCE_LATENCY))
pa_log_debug("Source %s: LATENCY flag %s.", s->name, (s->flags & PA_SOURCE_LATENCY) ? "enabled" : "disabled");
if ((s->flags & PA_SOURCE_DYNAMIC_LATENCY) != (old_flags & PA_SOURCE_DYNAMIC_LATENCY))
pa_log_debug("Source %s: DYNAMIC_LATENCY flag %s.",
s->name, (s->flags & PA_SOURCE_DYNAMIC_LATENCY) ? "enabled" : "disabled");
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_FLAGS_CHANGED], s);
PA_IDXSET_FOREACH(output, s->outputs, idx) {
if (output->destination_source)
pa_source_update_flags(output->destination_source, mask, value);
}
}
/* Called from IO context, or before _put() from main context */
void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p) {
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
s->thread_info.rtpoll = p;
}
/* Called from main context */
int pa_source_update_status(pa_source*s) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
if (s->state == PA_SOURCE_SUSPENDED)
return 0;
return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
}
/* Called from any context - must be threadsafe */
void pa_source_set_mixer_dirty(pa_source *s, bool is_dirty) {
pa_atomic_store(&s->mixer_dirty, is_dirty ? 1 : 0);
}
/* Called from main context */
int pa_source_suspend(pa_source *s, bool suspend, pa_suspend_cause_t cause) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
pa_assert(cause != 0);
if (s->monitor_of && cause != PA_SUSPEND_PASSTHROUGH)
return -PA_ERR_NOTSUPPORTED;
if (suspend)
s->suspend_cause |= cause;
else
s->suspend_cause &= ~cause;
if (!(s->suspend_cause & PA_SUSPEND_SESSION) && (pa_atomic_load(&s->mixer_dirty) != 0)) {
/* This might look racy but isn't: If somebody sets mixer_dirty exactly here,
it'll be handled just fine. */
pa_source_set_mixer_dirty(s, false);
pa_log_debug("Mixer is now accessible. Updating alsa mixer settings.");
if (s->active_port && s->set_port) {
if (s->flags & PA_SOURCE_DEFERRED_VOLUME) {
struct source_message_set_port msg = { .port = s->active_port, .ret = 0 };
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_PORT, &msg, 0, NULL) == 0);
}
else
s->set_port(s, s->active_port);
}
else {
if (s->set_mute)
s->set_mute(s);
if (s->set_volume)
s->set_volume(s);
}
}
if ((pa_source_get_state(s) == PA_SOURCE_SUSPENDED) == !!s->suspend_cause)
return 0;
pa_log_debug("Suspend cause of source %s is 0x%04x, %s", s->name, s->suspend_cause, s->suspend_cause ? "suspending" : "resuming");
if (s->suspend_cause)
return source_set_state(s, PA_SOURCE_SUSPENDED);
else
return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
}
/* Called from main context */
int pa_source_sync_suspend(pa_source *s) {
pa_sink_state_t state;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
pa_assert(s->monitor_of);
state = pa_sink_get_state(s->monitor_of);
if (state == PA_SINK_SUSPENDED)
return source_set_state(s, PA_SOURCE_SUSPENDED);
pa_assert(PA_SINK_IS_OPENED(state));
return source_set_state(s, pa_source_used_by(s) ? PA_SOURCE_RUNNING : PA_SOURCE_IDLE);
}
/* Called from main context */
pa_queue *pa_source_move_all_start(pa_source *s, pa_queue *q) {
pa_source_output *o, *n;
uint32_t idx;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
if (!q)
q = pa_queue_new();
for (o = PA_SOURCE_OUTPUT(pa_idxset_first(s->outputs, &idx)); o; o = n) {
n = PA_SOURCE_OUTPUT(pa_idxset_next(s->outputs, &idx));
pa_source_output_ref(o);
if (pa_source_output_start_move(o) >= 0)
pa_queue_push(q, o);
else
pa_source_output_unref(o);
}
return q;
}
/* Called from main context */
void pa_source_move_all_finish(pa_source *s, pa_queue *q, bool save) {
pa_source_output *o;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
pa_assert(q);
while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
if (pa_source_output_finish_move(o, s, save) < 0)
pa_source_output_fail_move(o);
pa_source_output_unref(o);
}
pa_queue_free(q, NULL);
}
/* Called from main context */
void pa_source_move_all_fail(pa_queue *q) {
pa_source_output *o;
pa_assert_ctl_context();
pa_assert(q);
while ((o = PA_SOURCE_OUTPUT(pa_queue_pop(q)))) {
pa_source_output_fail_move(o);
pa_source_output_unref(o);
}
pa_queue_free(q, NULL);
}
/* Called from IO thread context */
void pa_source_process_rewind(pa_source *s, size_t nbytes) {
pa_source_output *o;
void *state = NULL;
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
if (nbytes <= 0)
return;
if (s->thread_info.state == PA_SOURCE_SUSPENDED)
return;
pa_log_debug("Processing rewind...");
PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state) {
pa_source_output_assert_ref(o);
pa_source_output_process_rewind(o, nbytes);
}
}
/* Called from IO thread context */
void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
pa_source_output *o;
void *state = NULL;
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
pa_assert(chunk);
if (s->thread_info.state == PA_SOURCE_SUSPENDED)
return;
if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
pa_memchunk vchunk = *chunk;
pa_memblock_ref(vchunk.memblock);
pa_memchunk_make_writable(&vchunk, 0);
if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
pa_silence_memchunk(&vchunk, &s->sample_spec);
else
pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
pa_source_output_assert_ref(o);
if (!o->thread_info.direct_on_input)
pa_source_output_push(o, &vchunk);
}
pa_memblock_unref(vchunk.memblock);
} else {
while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL))) {
pa_source_output_assert_ref(o);
if (!o->thread_info.direct_on_input)
pa_source_output_push(o, chunk);
}
}
}
/* Called from IO thread context */
void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk) {
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
pa_source_output_assert_ref(o);
pa_assert(o->thread_info.direct_on_input);
pa_assert(chunk);
if (s->thread_info.state == PA_SOURCE_SUSPENDED)
return;
if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&s->thread_info.soft_volume)) {
pa_memchunk vchunk = *chunk;
pa_memblock_ref(vchunk.memblock);
pa_memchunk_make_writable(&vchunk, 0);
if (s->thread_info.soft_muted || pa_cvolume_is_muted(&s->thread_info.soft_volume))
pa_silence_memchunk(&vchunk, &s->sample_spec);
else
pa_volume_memchunk(&vchunk, &s->sample_spec, &s->thread_info.soft_volume);
pa_source_output_push(o, &vchunk);
pa_memblock_unref(vchunk.memblock);
} else
pa_source_output_push(o, chunk);
}
/* Called from main thread */
int pa_source_update_rate(pa_source *s, uint32_t rate, bool passthrough) {
int ret;
uint32_t desired_rate = rate;
uint32_t default_rate = s->default_sample_rate;
uint32_t alternate_rate = s->alternate_sample_rate;
bool default_rate_is_usable = false;
bool alternate_rate_is_usable = false;
if (rate == s->sample_spec.rate)
return 0;
if (!s->update_rate && !s->monitor_of)
return -1;
if (PA_UNLIKELY(default_rate == alternate_rate && !passthrough)) {
pa_log_debug("Default and alternate sample rates are the same, so there is no point in switching.");
return -1;
}
if (PA_SOURCE_IS_RUNNING(s->state)) {
pa_log_info("Cannot update rate, SOURCE_IS_RUNNING, will keep using %u Hz",
s->sample_spec.rate);
return -1;
}
if (s->monitor_of) {
if (PA_SINK_IS_RUNNING(s->monitor_of->state)) {
pa_log_info("Cannot update rate, this is a monitor source and the sink is running.");
return -1;
}
}
if (PA_UNLIKELY(!pa_sample_rate_valid(desired_rate)))
return -1;
if (!passthrough && default_rate != desired_rate && alternate_rate != desired_rate) {
if (default_rate % 11025 == 0 && desired_rate % 11025 == 0)
default_rate_is_usable = true;
if (default_rate % 4000 == 0 && desired_rate % 4000 == 0)
default_rate_is_usable = true;
if (alternate_rate && alternate_rate % 11025 == 0 && desired_rate % 11025 == 0)
alternate_rate_is_usable = true;
if (alternate_rate && alternate_rate % 4000 == 0 && desired_rate % 4000 == 0)
alternate_rate_is_usable = true;
if (alternate_rate_is_usable && !default_rate_is_usable)
desired_rate = alternate_rate;
else
desired_rate = default_rate;
}
if (desired_rate == s->sample_spec.rate)
return -1;
if (!passthrough && pa_source_used_by(s) > 0)
return -1;
pa_log_debug("Suspending source %s due to changing the sample rate.", s->name);
pa_source_suspend(s, true, PA_SUSPEND_INTERNAL);
if (s->update_rate)
ret = s->update_rate(s, desired_rate);
else {
/* This is a monitor source. */
/* XXX: This code is written with non-passthrough streams in mind. I
* have no idea whether the behaviour with passthrough streams is
* sensible. */
if (!passthrough) {
uint32_t old_rate = s->sample_spec.rate;
s->sample_spec.rate = desired_rate;
ret = pa_sink_update_rate(s->monitor_of, desired_rate, false);
if (ret < 0) {
/* Changing the sink rate failed, roll back the old rate for
* the monitor source. Why did we set the source rate before
* calling pa_sink_update_rate(), you may ask. The reason is
* that pa_sink_update_rate() tries to update the monitor
* source rate, but we are already in the process of updating
* the monitor source rate, so there's a risk of entering an
* infinite loop. Setting the source rate before calling
* pa_sink_update_rate() makes the rate == s->sample_spec.rate
* check in the beginning of this function return early, so we
* avoid looping. */
s->sample_spec.rate = old_rate;
}
} else
ret = -1;
}
if (ret >= 0) {
uint32_t idx;
pa_source_output *o;
PA_IDXSET_FOREACH(o, s->outputs, idx) {
if (o->state == PA_SOURCE_OUTPUT_CORKED)
pa_source_output_update_rate(o);
}
pa_log_info("Changed sampling rate successfully");
}
pa_source_suspend(s, false, PA_SUSPEND_INTERNAL);
return ret;
}
/* Called from main thread */
pa_usec_t pa_source_get_latency(pa_source *s) {
pa_usec_t usec;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
if (s->state == PA_SOURCE_SUSPENDED)
return 0;
if (!(s->flags & PA_SOURCE_LATENCY))
return 0;
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) == 0);
/* usec is unsigned, so check that the offset can be added to usec without
* underflowing. */
if (-s->latency_offset <= (int64_t) usec)
usec += s->latency_offset;
else
usec = 0;
return usec;
}
/* Called from IO thread */
pa_usec_t pa_source_get_latency_within_thread(pa_source *s) {
pa_usec_t usec = 0;
pa_msgobject *o;
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
/* The returned value is supposed to be in the time domain of the sound card! */
if (s->thread_info.state == PA_SOURCE_SUSPENDED)
return 0;
if (!(s->flags & PA_SOURCE_LATENCY))
return 0;
o = PA_MSGOBJECT(s);
/* FIXME: We probably should make this a proper vtable callback instead of going through process_msg() */
if (o->process_msg(o, PA_SOURCE_MESSAGE_GET_LATENCY, &usec, 0, NULL) < 0)
return -1;
/* usec is unsigned, so check that the offset can be added to usec without
* underflowing. */
if (-s->thread_info.latency_offset <= (int64_t) usec)
usec += s->thread_info.latency_offset;
else
usec = 0;
return usec;
}
/* Called from the main thread (and also from the IO thread while the main
* thread is waiting).
*
* When a source uses volume sharing, it never has the PA_SOURCE_FLAT_VOLUME flag
* set. Instead, flat volume mode is detected by checking whether the root source
* has the flag set. */
bool pa_source_flat_volume_enabled(pa_source *s) {
pa_source_assert_ref(s);
s = pa_source_get_master(s);
if (PA_LIKELY(s))
return (s->flags & PA_SOURCE_FLAT_VOLUME);
else
return false;
}
/* Called from the main thread (and also from the IO thread while the main
* thread is waiting). */
pa_source *pa_source_get_master(pa_source *s) {
pa_source_assert_ref(s);
while (s && (s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
if (PA_UNLIKELY(!s->output_from_master))
return NULL;
s = s->output_from_master->source;
}
return s;
}
/* Called from main context */
bool pa_source_is_filter(pa_source *s) {
pa_source_assert_ref(s);
return (s->output_from_master != NULL);
}
/* Called from main context */
bool pa_source_is_passthrough(pa_source *s) {
pa_source_assert_ref(s);
/* NB Currently only monitor sources support passthrough mode */
return (s->monitor_of && pa_sink_is_passthrough(s->monitor_of));
}
/* Called from main context */
void pa_source_enter_passthrough(pa_source *s) {
pa_cvolume volume;
/* set the volume to NORM */
s->saved_volume = *pa_source_get_volume(s, true);
s->saved_save_volume = s->save_volume;
pa_cvolume_set(&volume, s->sample_spec.channels, PA_MIN(s->base_volume, PA_VOLUME_NORM));
pa_source_set_volume(s, &volume, true, false);
}
/* Called from main context */
void pa_source_leave_passthrough(pa_source *s) {
/* Restore source volume to what it was before we entered passthrough mode */
pa_source_set_volume(s, &s->saved_volume, true, s->saved_save_volume);
pa_cvolume_init(&s->saved_volume);
s->saved_save_volume = false;
}
/* Called from main context. */
static void compute_reference_ratio(pa_source_output *o) {
unsigned c = 0;
pa_cvolume remapped;
pa_cvolume ratio;
pa_assert(o);
pa_assert(pa_source_flat_volume_enabled(o->source));
/*
* Calculates the reference ratio from the source's reference
* volume. This basically calculates:
*
* o->reference_ratio = o->volume / o->source->reference_volume
*/
remapped = o->source->reference_volume;
pa_cvolume_remap(&remapped, &o->source->channel_map, &o->channel_map);
ratio = o->reference_ratio;
for (c = 0; c < o->sample_spec.channels; c++) {
/* We don't update when the source volume is 0 anyway */
if (remapped.values[c] <= PA_VOLUME_MUTED)
continue;
/* Don't update the reference ratio unless necessary */
if (pa_sw_volume_multiply(
ratio.values[c],
remapped.values[c]) == o->volume.values[c])
continue;
ratio.values[c] = pa_sw_volume_divide(
o->volume.values[c],
remapped.values[c]);
}
pa_source_output_set_reference_ratio(o, &ratio);
}
/* Called from main context. Only called for the root source in volume sharing
* cases, except for internal recursive calls. */
static void compute_reference_ratios(pa_source *s) {
uint32_t idx;
pa_source_output *o;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
pa_assert(pa_source_flat_volume_enabled(s));
PA_IDXSET_FOREACH(o, s->outputs, idx) {
compute_reference_ratio(o);
if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
compute_reference_ratios(o->destination_source);
}
}
/* Called from main context. Only called for the root source in volume sharing
* cases, except for internal recursive calls. */
static void compute_real_ratios(pa_source *s) {
pa_source_output *o;
uint32_t idx;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
pa_assert(pa_source_flat_volume_enabled(s));
PA_IDXSET_FOREACH(o, s->outputs, idx) {
unsigned c;
pa_cvolume remapped;
if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
/* The origin source uses volume sharing, so this input's real ratio
* is handled as a special case - the real ratio must be 0 dB, and
* as a result i->soft_volume must equal i->volume_factor. */
pa_cvolume_reset(&o->real_ratio, o->real_ratio.channels);
o->soft_volume = o->volume_factor;
compute_real_ratios(o->destination_source);
continue;
}
/*
* This basically calculates:
*
* i->real_ratio := i->volume / s->real_volume
* i->soft_volume := i->real_ratio * i->volume_factor
*/
remapped = s->real_volume;
pa_cvolume_remap(&remapped, &s->channel_map, &o->channel_map);
o->real_ratio.channels = o->sample_spec.channels;
o->soft_volume.channels = o->sample_spec.channels;
for (c = 0; c < o->sample_spec.channels; c++) {
if (remapped.values[c] <= PA_VOLUME_MUTED) {
/* We leave o->real_ratio untouched */
o->soft_volume.values[c] = PA_VOLUME_MUTED;
continue;
}
/* Don't lose accuracy unless necessary */
if (pa_sw_volume_multiply(
o->real_ratio.values[c],
remapped.values[c]) != o->volume.values[c])
o->real_ratio.values[c] = pa_sw_volume_divide(
o->volume.values[c],
remapped.values[c]);
o->soft_volume.values[c] = pa_sw_volume_multiply(
o->real_ratio.values[c],
o->volume_factor.values[c]);
}
/* We don't copy the soft_volume to the thread_info data
* here. That must be done by the caller */
}
}
static pa_cvolume *cvolume_remap_minimal_impact(
pa_cvolume *v,
const pa_cvolume *template,
const pa_channel_map *from,
const pa_channel_map *to) {
pa_cvolume t;
pa_assert(v);
pa_assert(template);
pa_assert(from);
pa_assert(to);
pa_assert(pa_cvolume_compatible_with_channel_map(v, from));
pa_assert(pa_cvolume_compatible_with_channel_map(template, to));
/* Much like pa_cvolume_remap(), but tries to minimize impact when
* mapping from source output to source volumes:
*
* If template is a possible remapping from v it is used instead
* of remapping anew.
*
* If the channel maps don't match we set an all-channel volume on
* the source to ensure that changing a volume on one stream has no
* effect that cannot be compensated for in another stream that
* does not have the same channel map as the source. */
if (pa_channel_map_equal(from, to))
return v;
t = *template;
if (pa_cvolume_equal(pa_cvolume_remap(&t, to, from), v)) {
*v = *template;
return v;
}
pa_cvolume_set(v, to->channels, pa_cvolume_max(v));
return v;
}
/* Called from main thread. Only called for the root source in volume sharing
* cases, except for internal recursive calls. */
static void get_maximum_output_volume(pa_source *s, pa_cvolume *max_volume, const pa_channel_map *channel_map) {
pa_source_output *o;
uint32_t idx;
pa_source_assert_ref(s);
pa_assert(max_volume);
pa_assert(channel_map);
pa_assert(pa_source_flat_volume_enabled(s));
PA_IDXSET_FOREACH(o, s->outputs, idx) {
pa_cvolume remapped;
if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
get_maximum_output_volume(o->destination_source, max_volume, channel_map);
/* Ignore this output. The origin source uses volume sharing, so this
* output's volume will be set to be equal to the root source's real
* volume. Obviously this output's current volume must not then
* affect what the root source's real volume will be. */
continue;
}
remapped = o->volume;
cvolume_remap_minimal_impact(&remapped, max_volume, &o->channel_map, channel_map);
pa_cvolume_merge(max_volume, max_volume, &remapped);
}
}
/* Called from main thread. Only called for the root source in volume sharing
* cases, except for internal recursive calls. */
static bool has_outputs(pa_source *s) {
pa_source_output *o;
uint32_t idx;
pa_source_assert_ref(s);
PA_IDXSET_FOREACH(o, s->outputs, idx) {
if (!o->destination_source || !(o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER) || has_outputs(o->destination_source))
return true;
}
return false;
}
/* Called from main thread. Only called for the root source in volume sharing
* cases, except for internal recursive calls. */
static void update_real_volume(pa_source *s, const pa_cvolume *new_volume, pa_channel_map *channel_map) {
pa_source_output *o;
uint32_t idx;
pa_source_assert_ref(s);
pa_assert(new_volume);
pa_assert(channel_map);
s->real_volume = *new_volume;
pa_cvolume_remap(&s->real_volume, channel_map, &s->channel_map);
PA_IDXSET_FOREACH(o, s->outputs, idx) {
if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
if (pa_source_flat_volume_enabled(s)) {
pa_cvolume new_output_volume;
/* Follow the root source's real volume. */
new_output_volume = *new_volume;
pa_cvolume_remap(&new_output_volume, channel_map, &o->channel_map);
pa_source_output_set_volume_direct(o, &new_output_volume);
compute_reference_ratio(o);
}
update_real_volume(o->destination_source, new_volume, channel_map);
}
}
}
/* Called from main thread. Only called for the root source in shared volume
* cases. */
static void compute_real_volume(pa_source *s) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
pa_assert(pa_source_flat_volume_enabled(s));
pa_assert(!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
/* This determines the maximum volume of all streams and sets
* s->real_volume accordingly. */
if (!has_outputs(s)) {
/* In the special case that we have no source outputs we leave the
* volume unmodified. */
update_real_volume(s, &s->reference_volume, &s->channel_map);
return;
}
pa_cvolume_mute(&s->real_volume, s->channel_map.channels);
/* First let's determine the new maximum volume of all outputs
* connected to this source */
get_maximum_output_volume(s, &s->real_volume, &s->channel_map);
update_real_volume(s, &s->real_volume, &s->channel_map);
/* Then, let's update the real ratios/soft volumes of all outputs
* connected to this source */
compute_real_ratios(s);
}
/* Called from main thread. Only called for the root source in shared volume
* cases, except for internal recursive calls. */
static void propagate_reference_volume(pa_source *s) {
pa_source_output *o;
uint32_t idx;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
pa_assert(pa_source_flat_volume_enabled(s));
/* This is called whenever the source volume changes that is not
* caused by a source output volume change. We need to fix up the
* source output volumes accordingly */
PA_IDXSET_FOREACH(o, s->outputs, idx) {
pa_cvolume new_volume;
if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
propagate_reference_volume(o->destination_source);
/* Since the origin source uses volume sharing, this output's volume
* needs to be updated to match the root source's real volume, but
* that will be done later in update_shared_real_volume(). */
continue;
}
/* This basically calculates:
*
* o->volume := o->reference_volume * o->reference_ratio */
new_volume = s->reference_volume;
pa_cvolume_remap(&new_volume, &s->channel_map, &o->channel_map);
pa_sw_cvolume_multiply(&new_volume, &new_volume, &o->reference_ratio);
pa_source_output_set_volume_direct(o, &new_volume);
}
}
/* Called from main thread. Only called for the root source in volume sharing
* cases, except for internal recursive calls. The return value indicates
* whether any reference volume actually changed. */
static bool update_reference_volume(pa_source *s, const pa_cvolume *v, const pa_channel_map *channel_map, bool save) {
pa_cvolume volume;
bool reference_volume_changed;
pa_source_output *o;
uint32_t idx;
pa_source_assert_ref(s);
pa_assert(PA_SOURCE_IS_LINKED(s->state));
pa_assert(v);
pa_assert(channel_map);
pa_assert(pa_cvolume_valid(v));
volume = *v;
pa_cvolume_remap(&volume, channel_map, &s->channel_map);
reference_volume_changed = !pa_cvolume_equal(&volume, &s->reference_volume);
pa_source_set_reference_volume_direct(s, &volume);
s->save_volume = (!reference_volume_changed && s->save_volume) || save;
if (!reference_volume_changed && !(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
/* If the root source's volume doesn't change, then there can't be any
* changes in the other source in the source tree either.
*
* It's probably theoretically possible that even if the root source's
* volume changes slightly, some filter source doesn't change its volume
* due to rounding errors. If that happens, we still want to propagate
* the changed root source volume to the sources connected to the
* intermediate source that didn't change its volume. This theoretical
* possibility is the reason why we have that !(s->flags &
* PA_SOURCE_SHARE_VOLUME_WITH_MASTER) condition. Probably nobody would
* notice even if we returned here false always if
* reference_volume_changed is false. */
return false;
PA_IDXSET_FOREACH(o, s->outputs, idx) {
if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
update_reference_volume(o->destination_source, v, channel_map, false);
}
return true;
}
/* Called from main thread */
void pa_source_set_volume(
pa_source *s,
const pa_cvolume *volume,
bool send_msg,
bool save) {
pa_cvolume new_reference_volume, root_real_volume;
pa_source *root_source;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
pa_assert(!volume || pa_cvolume_valid(volume));
pa_assert(volume || pa_source_flat_volume_enabled(s));
pa_assert(!volume || volume->channels == 1 || pa_cvolume_compatible(volume, &s->sample_spec));
/* make sure we don't change the volume in PASSTHROUGH mode ...
* ... *except* if we're being invoked to reset the volume to ensure 0 dB gain */
if (pa_source_is_passthrough(s) && (!volume || !pa_cvolume_is_norm(volume))) {
pa_log_warn("Cannot change volume, source is monitor of a PASSTHROUGH sink");
return;
}
/* In case of volume sharing, the volume is set for the root source first,
* from which it's then propagated to the sharing sources. */
root_source = pa_source_get_master(s);
if (PA_UNLIKELY(!root_source))
return;
/* As a special exception we accept mono volumes on all sources --
* even on those with more complex channel maps */
if (volume) {
if (pa_cvolume_compatible(volume, &s->sample_spec))
new_reference_volume = *volume;
else {
new_reference_volume = s->reference_volume;
pa_cvolume_scale(&new_reference_volume, pa_cvolume_max(volume));
}
pa_cvolume_remap(&new_reference_volume, &s->channel_map, &root_source->channel_map);
if (update_reference_volume(root_source, &new_reference_volume, &root_source->channel_map, save)) {
if (pa_source_flat_volume_enabled(root_source)) {
/* OK, propagate this volume change back to the outputs */
propagate_reference_volume(root_source);
/* And now recalculate the real volume */
compute_real_volume(root_source);
} else
update_real_volume(root_source, &root_source->reference_volume, &root_source->channel_map);
}
} else {
/* If volume is NULL we synchronize the source's real and
* reference volumes with the stream volumes. */
pa_assert(pa_source_flat_volume_enabled(root_source));
/* Ok, let's determine the new real volume */
compute_real_volume(root_source);
/* To propagate the reference volume from the filter to the root source,
* we first take the real volume from the root source and remap it to
* match the filter. Then, we merge in the reference volume from the
* filter on top of this, and remap it back to the root source channel
* count and map */
root_real_volume = root_source->real_volume;
/* First we remap root's real volume to filter channel count and map if needed */
if (s != root_source && !pa_channel_map_equal(&s->channel_map, &root_source->channel_map))
pa_cvolume_remap(&root_real_volume, &root_source->channel_map, &s->channel_map);
/* Then let's 'push' the reference volume if necessary */
pa_cvolume_merge(&new_reference_volume, &s->reference_volume, &root_real_volume);
/* If the source and its root don't have the same number of channels, we need to remap back */
if (s != root_source && !pa_channel_map_equal(&s->channel_map, &root_source->channel_map))
pa_cvolume_remap(&new_reference_volume, &s->channel_map, &root_source->channel_map);
update_reference_volume(root_source, &new_reference_volume, &root_source->channel_map, save);
/* Now that the reference volume is updated, we can update the streams'
* reference ratios. */
compute_reference_ratios(root_source);
}
if (root_source->set_volume) {
/* If we have a function set_volume(), then we do not apply a
* soft volume by default. However, set_volume() is free to
* apply one to root_source->soft_volume */
pa_cvolume_reset(&root_source->soft_volume, root_source->sample_spec.channels);
if (!(root_source->flags & PA_SOURCE_DEFERRED_VOLUME))
root_source->set_volume(root_source);
} else
/* If we have no function set_volume(), then the soft volume
* becomes the real volume */
root_source->soft_volume = root_source->real_volume;
/* This tells the source that soft volume and/or real volume changed */
if (send_msg)
pa_assert_se(pa_asyncmsgq_send(root_source->asyncmsgq, PA_MSGOBJECT(root_source), PA_SOURCE_MESSAGE_SET_SHARED_VOLUME, NULL, 0, NULL) == 0);
}
/* Called from the io thread if sync volume is used, otherwise from the main thread.
* Only to be called by source implementor */
void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume) {
pa_source_assert_ref(s);
pa_assert(!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
if (s->flags & PA_SOURCE_DEFERRED_VOLUME)
pa_source_assert_io_context(s);
else
pa_assert_ctl_context();
if (!volume)
pa_cvolume_reset(&s->soft_volume, s->sample_spec.channels);
else
s->soft_volume = *volume;
if (PA_SOURCE_IS_LINKED(s->state) && !(s->flags & PA_SOURCE_DEFERRED_VOLUME))
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME, NULL, 0, NULL) == 0);
else
s->thread_info.soft_volume = s->soft_volume;
}
/* Called from the main thread. Only called for the root source in volume sharing
* cases, except for internal recursive calls. */
static void propagate_real_volume(pa_source *s, const pa_cvolume *old_real_volume) {
pa_source_output *o;
uint32_t idx;
pa_source_assert_ref(s);
pa_assert(old_real_volume);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
/* This is called when the hardware's real volume changes due to
* some external event. We copy the real volume into our
* reference volume and then rebuild the stream volumes based on
* i->real_ratio which should stay fixed. */
if (!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
if (pa_cvolume_equal(old_real_volume, &s->real_volume))
return;
/* 1. Make the real volume the reference volume */
update_reference_volume(s, &s->real_volume, &s->channel_map, true);
}
if (pa_source_flat_volume_enabled(s)) {
PA_IDXSET_FOREACH(o, s->outputs, idx) {
pa_cvolume new_volume;
/* 2. Since the source's reference and real volumes are equal
* now our ratios should be too. */
pa_source_output_set_reference_ratio(o, &o->real_ratio);
/* 3. Recalculate the new stream reference volume based on the
* reference ratio and the sink's reference volume.
*
* This basically calculates:
*
* o->volume = s->reference_volume * o->reference_ratio
*
* This is identical to propagate_reference_volume() */
new_volume = s->reference_volume;
pa_cvolume_remap(&new_volume, &s->channel_map, &o->channel_map);
pa_sw_cvolume_multiply(&new_volume, &new_volume, &o->reference_ratio);
pa_source_output_set_volume_direct(o, &new_volume);
if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
propagate_real_volume(o->destination_source, old_real_volume);
}
}
/* Something got changed in the hardware. It probably makes sense
* to save changed hw settings given that hw volume changes not
* triggered by PA are almost certainly done by the user. */
if (!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
s->save_volume = true;
}
/* Called from io thread */
void pa_source_update_volume_and_mute(pa_source *s) {
pa_assert(s);
pa_source_assert_io_context(s);
pa_asyncmsgq_post(pa_thread_mq_get()->outq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_UPDATE_VOLUME_AND_MUTE, NULL, 0, NULL, NULL);
}
/* Called from main thread */
const pa_cvolume *pa_source_get_volume(pa_source *s, bool force_refresh) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
if (s->refresh_volume || force_refresh) {
struct pa_cvolume old_real_volume;
pa_assert(!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
old_real_volume = s->real_volume;
if (!(s->flags & PA_SOURCE_DEFERRED_VOLUME) && s->get_volume)
s->get_volume(s);
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_VOLUME, NULL, 0, NULL) == 0);
update_real_volume(s, &s->real_volume, &s->channel_map);
propagate_real_volume(s, &old_real_volume);
}
return &s->reference_volume;
}
/* Called from main thread. In volume sharing cases, only the root source may
* call this. */
void pa_source_volume_changed(pa_source *s, const pa_cvolume *new_real_volume) {
pa_cvolume old_real_volume;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
pa_assert(!(s->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER));
/* The source implementor may call this if the volume changed to make sure everyone is notified */
old_real_volume = s->real_volume;
update_real_volume(s, new_real_volume, &s->channel_map);
propagate_real_volume(s, &old_real_volume);
}
/* Called from main thread */
void pa_source_set_mute(pa_source *s, bool mute, bool save) {
bool old_muted;
pa_source_assert_ref(s);
pa_assert_ctl_context();
old_muted = s->muted;
if (mute == old_muted) {
s->save_muted |= save;
return;
}
s->muted = mute;
s->save_muted = save;
if (!(s->flags & PA_SOURCE_DEFERRED_VOLUME) && s->set_mute) {
s->set_mute_in_progress = true;
s->set_mute(s);
s->set_mute_in_progress = false;
}
if (!PA_SOURCE_IS_LINKED(s->state))
return;
pa_log_debug("The mute of source %s changed from %s to %s.", s->name, pa_yes_no(old_muted), pa_yes_no(mute));
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MUTE, NULL, 0, NULL) == 0);
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_MUTE_CHANGED], s);
}
/* Called from main thread */
bool pa_source_get_mute(pa_source *s, bool force_refresh) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
if ((s->refresh_muted || force_refresh) && s->get_mute) {
bool mute;
if (s->flags & PA_SOURCE_DEFERRED_VOLUME) {
if (pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MUTE, &mute, 0, NULL) >= 0)
pa_source_mute_changed(s, mute);
} else {
if (s->get_mute(s, &mute) >= 0)
pa_source_mute_changed(s, mute);
}
}
return s->muted;
}
/* Called from main thread */
void pa_source_mute_changed(pa_source *s, bool new_muted) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
if (s->set_mute_in_progress)
return;
/* pa_source_set_mute() does this same check, so this may appear redundant,
* but we must have this here also, because the save parameter of
* pa_source_set_mute() would otherwise have unintended side effects
* (saving the mute state when it shouldn't be saved). */
if (new_muted == s->muted)
return;
pa_source_set_mute(s, new_muted, true);
}
/* Called from main thread */
bool pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
if (p)
pa_proplist_update(s->proplist, mode, p);
if (PA_SOURCE_IS_LINKED(s->state)) {
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
}
return true;
}
/* Called from main thread */
/* FIXME -- this should be dropped and be merged into pa_source_update_proplist() */
void pa_source_set_description(pa_source *s, const char *description) {
const char *old;
pa_source_assert_ref(s);
pa_assert_ctl_context();
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 && pa_streq(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 (PA_SOURCE_IS_LINKED(s->state)) {
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PROPLIST_CHANGED], s);
}
}
/* Called from main thread */
unsigned pa_source_linked_by(pa_source *s) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
return pa_idxset_size(s->outputs);
}
/* Called from main thread */
unsigned pa_source_used_by(pa_source *s) {
unsigned ret;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
ret = pa_idxset_size(s->outputs);
pa_assert(ret >= s->n_corked);
return ret - s->n_corked;
}
/* Called from main thread */
unsigned pa_source_check_suspend(pa_source *s) {
unsigned ret;
pa_source_output *o;
uint32_t idx;
pa_source_assert_ref(s);
pa_assert_ctl_context();
if (!PA_SOURCE_IS_LINKED(s->state))
return 0;
ret = 0;
PA_IDXSET_FOREACH(o, s->outputs, idx) {
pa_source_output_state_t st;
st = pa_source_output_get_state(o);
/* We do not assert here. It is perfectly valid for a source output to
* be in the INIT state (i.e. created, marked done but not yet put)
* and we should not care if it's unlinked as it won't contribute
* towards our busy status.
*/
if (!PA_SOURCE_OUTPUT_IS_LINKED(st))
continue;
if (st == PA_SOURCE_OUTPUT_CORKED)
continue;
if (o->flags & PA_SOURCE_OUTPUT_DONT_INHIBIT_AUTO_SUSPEND)
continue;
ret ++;
}
return ret;
}
/* Called from the IO thread */
static void sync_output_volumes_within_thread(pa_source *s) {
pa_source_output *o;
void *state = NULL;
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state) {
if (pa_cvolume_equal(&o->thread_info.soft_volume, &o->soft_volume))
continue;
o->thread_info.soft_volume = o->soft_volume;
//pa_source_output_request_rewind(o, 0, true, false, false);
}
}
/* Called from the IO thread. Only called for the root source in volume sharing
* cases, except for internal recursive calls. */
static void set_shared_volume_within_thread(pa_source *s) {
pa_source_output *o;
void *state = NULL;
pa_source_assert_ref(s);
PA_MSGOBJECT(s)->process_msg(PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_VOLUME_SYNCED, NULL, 0, NULL);
PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state) {
if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER))
set_shared_volume_within_thread(o->destination_source);
}
}
/* Called from IO thread, except when it is not */
int pa_source_process_msg(pa_msgobject *object, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
pa_source *s = PA_SOURCE(object);
pa_source_assert_ref(s);
switch ((pa_source_message_t) code) {
case PA_SOURCE_MESSAGE_ADD_OUTPUT: {
pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
pa_hashmap_put(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index), pa_source_output_ref(o));
if (o->direct_on_input) {
o->thread_info.direct_on_input = o->direct_on_input;
pa_hashmap_put(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index), o);
}
pa_assert(!o->thread_info.attached);
o->thread_info.attached = true;
if (o->attach)
o->attach(o);
pa_source_output_set_state_within_thread(o, o->state);
if (o->thread_info.requested_source_latency != (pa_usec_t) -1)
pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
/* We don't just invalidate the requested latency here,
* because if we are in a move we might need to fix up the
* requested latency. */
pa_source_output_set_requested_latency_within_thread(o, o->thread_info.requested_source_latency);
/* In flat volume mode we need to update the volume as
* well */
return object->process_msg(object, PA_SOURCE_MESSAGE_SET_SHARED_VOLUME, NULL, 0, NULL);
}
case PA_SOURCE_MESSAGE_REMOVE_OUTPUT: {
pa_source_output *o = PA_SOURCE_OUTPUT(userdata);
pa_source_output_set_state_within_thread(o, o->state);
if (o->detach)
o->detach(o);
pa_assert(o->thread_info.attached);
o->thread_info.attached = false;
if (o->thread_info.direct_on_input) {
pa_hashmap_remove(o->thread_info.direct_on_input->thread_info.direct_outputs, PA_UINT32_TO_PTR(o->index));
o->thread_info.direct_on_input = NULL;
}
pa_hashmap_remove_and_free(s->thread_info.outputs, PA_UINT32_TO_PTR(o->index));
pa_source_invalidate_requested_latency(s, true);
/* In flat volume mode we need to update the volume as
* well */
return object->process_msg(object, PA_SOURCE_MESSAGE_SET_SHARED_VOLUME, NULL, 0, NULL);
}
case PA_SOURCE_MESSAGE_SET_SHARED_VOLUME: {
pa_source *root_source = pa_source_get_master(s);
if (PA_LIKELY(root_source))
set_shared_volume_within_thread(root_source);
return 0;
}
case PA_SOURCE_MESSAGE_SET_VOLUME_SYNCED:
if (s->flags & PA_SOURCE_DEFERRED_VOLUME) {
s->set_volume(s);
pa_source_volume_change_push(s);
}
/* Fall through ... */
case PA_SOURCE_MESSAGE_SET_VOLUME:
if (!pa_cvolume_equal(&s->thread_info.soft_volume, &s->soft_volume)) {
s->thread_info.soft_volume = s->soft_volume;
}
/* Fall through ... */
case PA_SOURCE_MESSAGE_SYNC_VOLUMES:
sync_output_volumes_within_thread(s);
return 0;
case PA_SOURCE_MESSAGE_GET_VOLUME:
if ((s->flags & PA_SOURCE_DEFERRED_VOLUME) && s->get_volume) {
s->get_volume(s);
pa_source_volume_change_flush(s);
pa_sw_cvolume_divide(&s->thread_info.current_hw_volume, &s->real_volume, &s->soft_volume);
}
/* In case source implementor reset SW volume. */
if (!pa_cvolume_equal(&s->thread_info.soft_volume, &s->soft_volume)) {
s->thread_info.soft_volume = s->soft_volume;
}
return 0;
case PA_SOURCE_MESSAGE_SET_MUTE:
if (s->thread_info.soft_muted != s->muted) {
s->thread_info.soft_muted = s->muted;
}
if (s->flags & PA_SOURCE_DEFERRED_VOLUME && s->set_mute)
s->set_mute(s);
return 0;
case PA_SOURCE_MESSAGE_GET_MUTE:
if (s->flags & PA_SOURCE_DEFERRED_VOLUME && s->get_mute)
return s->get_mute(s, userdata);
return 0;
case PA_SOURCE_MESSAGE_SET_STATE: {
bool suspend_change =
(s->thread_info.state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(PA_PTR_TO_UINT(userdata))) ||
(PA_SOURCE_IS_OPENED(s->thread_info.state) && PA_PTR_TO_UINT(userdata) == PA_SOURCE_SUSPENDED);
s->thread_info.state = PA_PTR_TO_UINT(userdata);
if (suspend_change) {
pa_source_output *o;
void *state = NULL;
while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
if (o->suspend_within_thread)
o->suspend_within_thread(o, s->thread_info.state == PA_SOURCE_SUSPENDED);
}
return 0;
}
case PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY: {
pa_usec_t *usec = userdata;
*usec = pa_source_get_requested_latency_within_thread(s);
/* Yes, that's right, the IO thread will see -1 when no
* explicit requested latency is configured, the main
* thread will see max_latency */
if (*usec == (pa_usec_t) -1)
*usec = s->thread_info.max_latency;
return 0;
}
case PA_SOURCE_MESSAGE_SET_LATENCY_RANGE: {
pa_usec_t *r = userdata;
pa_source_set_latency_range_within_thread(s, r[0], r[1]);
return 0;
}
case PA_SOURCE_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_SOURCE_MESSAGE_GET_FIXED_LATENCY:
*((pa_usec_t*) userdata) = s->thread_info.fixed_latency;
return 0;
case PA_SOURCE_MESSAGE_SET_FIXED_LATENCY:
pa_source_set_fixed_latency_within_thread(s, (pa_usec_t) offset);
return 0;
case PA_SOURCE_MESSAGE_GET_MAX_REWIND:
*((size_t*) userdata) = s->thread_info.max_rewind;
return 0;
case PA_SOURCE_MESSAGE_SET_MAX_REWIND:
pa_source_set_max_rewind_within_thread(s, (size_t) offset);
return 0;
case PA_SOURCE_MESSAGE_GET_LATENCY:
if (s->monitor_of) {
*((pa_usec_t*) userdata) = 0;
return 0;
}
/* Implementors need to overwrite this implementation! */
return -1;
case PA_SOURCE_MESSAGE_SET_PORT:
pa_assert(userdata);
if (s->set_port) {
struct source_message_set_port *msg_data = userdata;
msg_data->ret = s->set_port(s, msg_data->port);
}
return 0;
case PA_SOURCE_MESSAGE_UPDATE_VOLUME_AND_MUTE:
/* This message is sent from IO-thread and handled in main thread. */
pa_assert_ctl_context();
/* Make sure we're not messing with main thread when no longer linked */
if (!PA_SOURCE_IS_LINKED(s->state))
return 0;
pa_source_get_volume(s, true);
pa_source_get_mute(s, true);
return 0;
case PA_SOURCE_MESSAGE_SET_LATENCY_OFFSET:
s->thread_info.latency_offset = offset;
return 0;
case PA_SOURCE_MESSAGE_MAX:
;
}
return -1;
}
/* Called from main thread */
int pa_source_suspend_all(pa_core *c, bool suspend, pa_suspend_cause_t cause) {
pa_source *source;
uint32_t idx;
int ret = 0;
pa_core_assert_ref(c);
pa_assert_ctl_context();
pa_assert(cause != 0);
for (source = PA_SOURCE(pa_idxset_first(c->sources, &idx)); source; source = PA_SOURCE(pa_idxset_next(c->sources, &idx))) {
int r;
if (source->monitor_of)
continue;
if ((r = pa_source_suspend(source, suspend, cause)) < 0)
ret = r;
}
return ret;
}
/* Called from IO thread */
void pa_source_detach_within_thread(pa_source *s) {
pa_source_output *o;
void *state = NULL;
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
if (o->detach)
o->detach(o);
}
/* Called from IO thread */
void pa_source_attach_within_thread(pa_source *s) {
pa_source_output *o;
void *state = NULL;
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
pa_assert(PA_SOURCE_IS_LINKED(s->thread_info.state));
PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
if (o->attach)
o->attach(o);
}
/* Called from IO thread */
pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s) {
pa_usec_t result = (pa_usec_t) -1;
pa_source_output *o;
void *state = NULL;
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
if (!(s->flags & PA_SOURCE_DYNAMIC_LATENCY))
return PA_CLAMP(s->thread_info.fixed_latency, s->thread_info.min_latency, s->thread_info.max_latency);
if (s->thread_info.requested_latency_valid)
return s->thread_info.requested_latency;
PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
if (o->thread_info.requested_source_latency != (pa_usec_t) -1 &&
(result == (pa_usec_t) -1 || result > o->thread_info.requested_source_latency))
result = o->thread_info.requested_source_latency;
if (result != (pa_usec_t) -1)
result = PA_CLAMP(result, s->thread_info.min_latency, s->thread_info.max_latency);
if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
/* Only cache this if we are fully set up */
s->thread_info.requested_latency = result;
s->thread_info.requested_latency_valid = true;
}
return result;
}
/* Called from main thread */
pa_usec_t pa_source_get_requested_latency(pa_source *s) {
pa_usec_t usec = 0;
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(PA_SOURCE_IS_LINKED(s->state));
if (s->state == PA_SOURCE_SUSPENDED)
return 0;
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY, &usec, 0, NULL) == 0);
return usec;
}
/* Called from IO thread */
void pa_source_set_max_rewind_within_thread(pa_source *s, size_t max_rewind) {
pa_source_output *o;
void *state = NULL;
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
if (max_rewind == s->thread_info.max_rewind)
return;
s->thread_info.max_rewind = max_rewind;
if (PA_SOURCE_IS_LINKED(s->thread_info.state))
PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
pa_source_output_update_max_rewind(o, s->thread_info.max_rewind);
}
/* Called from main thread */
void pa_source_set_max_rewind(pa_source *s, size_t max_rewind) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
if (PA_SOURCE_IS_LINKED(s->state))
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_MAX_REWIND, NULL, max_rewind, NULL) == 0);
else
pa_source_set_max_rewind_within_thread(s, max_rewind);
}
/* Called from IO thread */
void pa_source_invalidate_requested_latency(pa_source *s, bool dynamic) {
pa_source_output *o;
void *state = NULL;
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
if ((s->flags & PA_SOURCE_DYNAMIC_LATENCY))
s->thread_info.requested_latency_valid = false;
else if (dynamic)
return;
if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
if (s->update_requested_latency)
s->update_requested_latency(s);
while ((o = pa_hashmap_iterate(s->thread_info.outputs, &state, NULL)))
if (o->update_source_requested_latency)
o->update_source_requested_latency(o);
}
if (s->monitor_of)
pa_sink_invalidate_requested_latency(s->monitor_of, dynamic);
}
/* Called from main thread */
void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
/* min_latency == 0: no limit
* min_latency anything else: specified limit
*
* Similar for max_latency */
if (min_latency < ABSOLUTE_MIN_LATENCY)
min_latency = ABSOLUTE_MIN_LATENCY;
if (max_latency <= 0 ||
max_latency > ABSOLUTE_MAX_LATENCY)
max_latency = ABSOLUTE_MAX_LATENCY;
pa_assert(min_latency <= max_latency);
/* Hmm, let's see if someone forgot to set PA_SOURCE_DYNAMIC_LATENCY here... */
pa_assert((min_latency == ABSOLUTE_MIN_LATENCY &&
max_latency == ABSOLUTE_MAX_LATENCY) ||
(s->flags & PA_SOURCE_DYNAMIC_LATENCY));
if (PA_SOURCE_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_SOURCE_MESSAGE_SET_LATENCY_RANGE, r, 0, NULL) == 0);
} else
pa_source_set_latency_range_within_thread(s, min_latency, max_latency);
}
/* Called from main thread */
void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
pa_assert(min_latency);
pa_assert(max_latency);
if (PA_SOURCE_IS_LINKED(s->state)) {
pa_usec_t r[2] = { 0, 0 };
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_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, and from main thread before pa_source_put() is called */
void pa_source_set_latency_range_within_thread(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency) {
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
pa_assert(min_latency >= ABSOLUTE_MIN_LATENCY);
pa_assert(max_latency <= ABSOLUTE_MAX_LATENCY);
pa_assert(min_latency <= max_latency);
/* Hmm, let's see if someone forgot to set PA_SOURCE_DYNAMIC_LATENCY here... */
pa_assert((min_latency == ABSOLUTE_MIN_LATENCY &&
max_latency == ABSOLUTE_MAX_LATENCY) ||
(s->flags & PA_SOURCE_DYNAMIC_LATENCY) ||
s->monitor_of);
if (s->thread_info.min_latency == min_latency &&
s->thread_info.max_latency == max_latency)
return;
s->thread_info.min_latency = min_latency;
s->thread_info.max_latency = max_latency;
if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
pa_source_output *o;
void *state = NULL;
PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
if (o->update_source_latency_range)
o->update_source_latency_range(o);
}
pa_source_invalidate_requested_latency(s, false);
}
/* Called from main thread, before the source is put */
void pa_source_set_fixed_latency(pa_source *s, pa_usec_t latency) {
pa_source_assert_ref(s);
pa_assert_ctl_context();
if (s->flags & PA_SOURCE_DYNAMIC_LATENCY) {
pa_assert(latency == 0);
return;
}
if (latency < ABSOLUTE_MIN_LATENCY)
latency = ABSOLUTE_MIN_LATENCY;
if (latency > ABSOLUTE_MAX_LATENCY)
latency = ABSOLUTE_MAX_LATENCY;
if (PA_SOURCE_IS_LINKED(s->state))
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_FIXED_LATENCY, NULL, (int64_t) latency, NULL) == 0);
else
s->thread_info.fixed_latency = latency;
}
/* Called from main thread */
pa_usec_t pa_source_get_fixed_latency(pa_source *s) {
pa_usec_t latency;
pa_source_assert_ref(s);
pa_assert_ctl_context();
if (s->flags & PA_SOURCE_DYNAMIC_LATENCY)
return 0;
if (PA_SOURCE_IS_LINKED(s->state))
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_FIXED_LATENCY, &latency, 0, NULL) == 0);
else
latency = s->thread_info.fixed_latency;
return latency;
}
/* Called from IO thread */
void pa_source_set_fixed_latency_within_thread(pa_source *s, pa_usec_t latency) {
pa_source_assert_ref(s);
pa_source_assert_io_context(s);
if (s->flags & PA_SOURCE_DYNAMIC_LATENCY) {
pa_assert(latency == 0);
s->thread_info.fixed_latency = 0;
return;
}
pa_assert(latency >= ABSOLUTE_MIN_LATENCY);
pa_assert(latency <= ABSOLUTE_MAX_LATENCY);
if (s->thread_info.fixed_latency == latency)
return;
s->thread_info.fixed_latency = latency;
if (PA_SOURCE_IS_LINKED(s->thread_info.state)) {
pa_source_output *o;
void *state = NULL;
PA_HASHMAP_FOREACH(o, s->thread_info.outputs, state)
if (o->update_source_fixed_latency)
o->update_source_fixed_latency(o);
}
pa_source_invalidate_requested_latency(s, false);
}
/* Called from main thread */
void pa_source_set_latency_offset(pa_source *s, int64_t offset) {
pa_source_assert_ref(s);
s->latency_offset = offset;
if (PA_SOURCE_IS_LINKED(s->state))
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_LATENCY_OFFSET, NULL, offset, NULL) == 0);
else
s->thread_info.latency_offset = offset;
}
/* Called from main thread */
size_t pa_source_get_max_rewind(pa_source *s) {
size_t r;
pa_assert_ctl_context();
pa_source_assert_ref(s);
if (!PA_SOURCE_IS_LINKED(s->state))
return s->thread_info.max_rewind;
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_GET_MAX_REWIND, &r, 0, NULL) == 0);
return r;
}
/* Called from main context */
int pa_source_set_port(pa_source *s, const char *name, bool save) {
pa_device_port *port;
int ret;
pa_source_assert_ref(s);
pa_assert_ctl_context();
if (!s->set_port) {
pa_log_debug("set_port() operation not implemented for source %u \"%s\"", s->index, s->name);
return -PA_ERR_NOTIMPLEMENTED;
}
if (!name)
return -PA_ERR_NOENTITY;
if (!(port = pa_hashmap_get(s->ports, name)))
return -PA_ERR_NOENTITY;
if (s->active_port == port) {
s->save_port = s->save_port || save;
return 0;
}
if (s->flags & PA_SOURCE_DEFERRED_VOLUME) {
struct source_message_set_port msg = { .port = port, .ret = 0 };
pa_assert_se(pa_asyncmsgq_send(s->asyncmsgq, PA_MSGOBJECT(s), PA_SOURCE_MESSAGE_SET_PORT, &msg, 0, NULL) == 0);
ret = msg.ret;
}
else
ret = s->set_port(s, port);
if (ret < 0)
return -PA_ERR_NOENTITY;
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
pa_log_info("Changed port of source %u \"%s\" to %s", s->index, s->name, port->name);
s->active_port = port;
s->save_port = save;
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PORT_CHANGED], s);
return 0;
}
PA_STATIC_FLIST_DECLARE(pa_source_volume_change, 0, pa_xfree);
/* Called from the IO thread. */
static pa_source_volume_change *pa_source_volume_change_new(pa_source *s) {
pa_source_volume_change *c;
if (!(c = pa_flist_pop(PA_STATIC_FLIST_GET(pa_source_volume_change))))
c = pa_xnew(pa_source_volume_change, 1);
PA_LLIST_INIT(pa_source_volume_change, c);
c->at = 0;
pa_cvolume_reset(&c->hw_volume, s->sample_spec.channels);
return c;
}
/* Called from the IO thread. */
static void pa_source_volume_change_free(pa_source_volume_change *c) {
pa_assert(c);
if (pa_flist_push(PA_STATIC_FLIST_GET(pa_source_volume_change), c) < 0)
pa_xfree(c);
}
/* Called from the IO thread. */
void pa_source_volume_change_push(pa_source *s) {
pa_source_volume_change *c = NULL;
pa_source_volume_change *nc = NULL;
pa_source_volume_change *pc = NULL;
uint32_t safety_margin = s->thread_info.volume_change_safety_margin;
const char *direction = NULL;
pa_assert(s);
nc = pa_source_volume_change_new(s);
/* NOTE: There is already more different volumes in pa_source that I can remember.
* Adding one more volume for HW would get us rid of this, but I am trying
* to survive with the ones we already have. */
pa_sw_cvolume_divide(&nc->hw_volume, &s->real_volume, &s->soft_volume);
if (!s->thread_info.volume_changes && pa_cvolume_equal(&nc->hw_volume, &s->thread_info.current_hw_volume)) {
pa_log_debug("Volume not changing");
pa_source_volume_change_free(nc);
return;
}
nc->at = pa_source_get_latency_within_thread(s);
nc->at += pa_rtclock_now() + s->thread_info.volume_change_extra_delay;
if (s->thread_info.volume_changes_tail) {
for (c = s->thread_info.volume_changes_tail; c; c = c->prev) {
/* If volume is going up let's do it a bit late. If it is going
* down let's do it a bit early. */
if (pa_cvolume_avg(&nc->hw_volume) > pa_cvolume_avg(&c->hw_volume)) {
if (nc->at + safety_margin > c->at) {
nc->at += safety_margin;
direction = "up";
break;
}
}
else if (nc->at - safety_margin > c->at) {
nc->at -= safety_margin;
direction = "down";
break;
}
}
}
if (c == NULL) {
if (pa_cvolume_avg(&nc->hw_volume) > pa_cvolume_avg(&s->thread_info.current_hw_volume)) {
nc->at += safety_margin;
direction = "up";
} else {
nc->at -= safety_margin;
direction = "down";
}
PA_LLIST_PREPEND(pa_source_volume_change, s->thread_info.volume_changes, nc);
}
else {
PA_LLIST_INSERT_AFTER(pa_source_volume_change, s->thread_info.volume_changes, c, nc);
}
pa_log_debug("Volume going %s to %d at %llu", direction, pa_cvolume_avg(&nc->hw_volume), (long long unsigned) nc->at);
/* We can ignore volume events that came earlier but should happen later than this. */
PA_LLIST_FOREACH_SAFE(c, pc, nc->next) {
pa_log_debug("Volume change to %d at %llu was dropped", pa_cvolume_avg(&c->hw_volume), (long long unsigned) c->at);
pa_source_volume_change_free(c);
}
nc->next = NULL;
s->thread_info.volume_changes_tail = nc;
}
/* Called from the IO thread. */
static void pa_source_volume_change_flush(pa_source *s) {
pa_source_volume_change *c = s->thread_info.volume_changes;
pa_assert(s);
s->thread_info.volume_changes = NULL;
s->thread_info.volume_changes_tail = NULL;
while (c) {
pa_source_volume_change *next = c->next;
pa_source_volume_change_free(c);
c = next;
}
}
/* Called from the IO thread. */
bool pa_source_volume_change_apply(pa_source *s, pa_usec_t *usec_to_next) {
pa_usec_t now;
bool ret = false;
pa_assert(s);
if (!s->thread_info.volume_changes || !PA_SOURCE_IS_LINKED(s->state)) {
if (usec_to_next)
*usec_to_next = 0;
return ret;
}
pa_assert(s->write_volume);
now = pa_rtclock_now();
while (s->thread_info.volume_changes && now >= s->thread_info.volume_changes->at) {
pa_source_volume_change *c = s->thread_info.volume_changes;
PA_LLIST_REMOVE(pa_source_volume_change, s->thread_info.volume_changes, c);
pa_log_debug("Volume change to %d at %llu was written %llu usec late",
pa_cvolume_avg(&c->hw_volume), (long long unsigned) c->at, (long long unsigned) (now - c->at));
ret = true;
s->thread_info.current_hw_volume = c->hw_volume;
pa_source_volume_change_free(c);
}
if (ret)
s->write_volume(s);
if (s->thread_info.volume_changes) {
if (usec_to_next)
*usec_to_next = s->thread_info.volume_changes->at - now;
if (pa_log_ratelimit(PA_LOG_DEBUG))
pa_log_debug("Next volume change in %lld usec", (long long) (s->thread_info.volume_changes->at - now));
}
else {
if (usec_to_next)
*usec_to_next = 0;
s->thread_info.volume_changes_tail = NULL;
}
return ret;
}
/* Called from the main thread */
/* Gets the list of formats supported by the source. The members and idxset must
* be freed by the caller. */
pa_idxset* pa_source_get_formats(pa_source *s) {
pa_idxset *ret;
pa_assert(s);
if (s->get_formats) {
/* Source supports format query, all is good */
ret = s->get_formats(s);
} else {
/* Source doesn't support format query, so assume it does PCM */
pa_format_info *f = pa_format_info_new();
f->encoding = PA_ENCODING_PCM;
ret = pa_idxset_new(NULL, NULL);
pa_idxset_put(ret, f, NULL);
}
return ret;
}
/* Called from the main thread */
/* Checks if the source can accept this format */
bool pa_source_check_format(pa_source *s, pa_format_info *f) {
pa_idxset *formats = NULL;
bool ret = false;
pa_assert(s);
pa_assert(f);
formats = pa_source_get_formats(s);
if (formats) {
pa_format_info *finfo_device;
uint32_t i;
PA_IDXSET_FOREACH(finfo_device, formats, i) {
if (pa_format_info_is_compatible(finfo_device, f)) {
ret = true;
break;
}
}
pa_idxset_free(formats, (pa_free_cb_t) pa_format_info_free);
}
return ret;
}
/* Called from the main thread */
/* Calculates the intersection between formats supported by the source and
* in_formats, and returns these, in the order of the source's formats. */
pa_idxset* pa_source_check_formats(pa_source *s, pa_idxset *in_formats) {
pa_idxset *out_formats = pa_idxset_new(NULL, NULL), *source_formats = NULL;
pa_format_info *f_source, *f_in;
uint32_t i, j;
pa_assert(s);
if (!in_formats || pa_idxset_isempty(in_formats))
goto done;
source_formats = pa_source_get_formats(s);
PA_IDXSET_FOREACH(f_source, source_formats, i) {
PA_IDXSET_FOREACH(f_in, in_formats, j) {
if (pa_format_info_is_compatible(f_source, f_in))
pa_idxset_put(out_formats, pa_format_info_copy(f_in), NULL);
}
}
done:
if (source_formats)
pa_idxset_free(source_formats, (pa_free_cb_t) pa_format_info_free);
return out_formats;
}
/* Called from the main thread. */
void pa_source_set_reference_volume_direct(pa_source *s, const pa_cvolume *volume) {
pa_cvolume old_volume;
char old_volume_str[PA_CVOLUME_SNPRINT_VERBOSE_MAX];
char new_volume_str[PA_CVOLUME_SNPRINT_VERBOSE_MAX];
pa_assert(s);
pa_assert(volume);
old_volume = s->reference_volume;
if (pa_cvolume_equal(volume, &old_volume))
return;
s->reference_volume = *volume;
pa_log_debug("The reference volume of source %s changed from %s to %s.", s->name,
pa_cvolume_snprint_verbose(old_volume_str, sizeof(old_volume_str), &old_volume, &s->channel_map,
s->flags & PA_SOURCE_DECIBEL_VOLUME),
pa_cvolume_snprint_verbose(new_volume_str, sizeof(new_volume_str), volume, &s->channel_map,
s->flags & PA_SOURCE_DECIBEL_VOLUME));
pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE, s->index);
pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_VOLUME_CHANGED], s);
}
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