[pulseaudio-discuss] [PATCH 2/4] sink-input, source-output: Assign to volume from only one place
Tanu Kaskinen
tanu.kaskinen at linux.intel.com
Mon Apr 7 05:24:17 PDT 2014
Forcing all volume changes to go through set_volume_internal() makes
it easier to check where the stream volume is changed, and it also
allows us to have only one place where notifications for changed
volume are sent.
---
src/pulsecore/sink-input.c | 77 +++++++++++++++++++++++--------------------
src/pulsecore/sink-input.h | 5 +++
src/pulsecore/sink.c | 53 ++++++++---------------------
src/pulsecore/source-output.c | 70 +++++++++++++++++++++++----------------
src/pulsecore/source-output.h | 5 +++
src/pulsecore/source.c | 54 ++++++++----------------------
6 files changed, 120 insertions(+), 144 deletions(-)
diff --git a/src/pulsecore/sink-input.c b/src/pulsecore/sink-input.c
index 2df229a..d08eb5f 100644
--- a/src/pulsecore/sink-input.c
+++ b/src/pulsecore/sink-input.c
@@ -1228,6 +1228,31 @@ pa_usec_t pa_sink_input_get_requested_latency(pa_sink_input *i) {
return i->thread_info.requested_sink_latency;
}
+/* Called from the main thread. */
+static void set_volume_internal(pa_sink_input *i, 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(i);
+ pa_assert(volume);
+
+ old_volume = i->volume;
+
+ if (pa_cvolume_equal(volume, &old_volume))
+ return;
+
+ i->volume = *volume;
+ pa_log_debug("The volume of sink input %u changed from %s to %s.", i->index,
+ pa_cvolume_snprint_verbose(old_volume_str, sizeof(old_volume_str), &old_volume, &i->channel_map, true),
+ pa_cvolume_snprint_verbose(new_volume_str, sizeof(new_volume_str), volume, &i->channel_map, true));
+
+ if (i->volume_changed)
+ i->volume_changed(i);
+
+ pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
+}
+
/* Called from main context */
void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume, bool save, bool absolute) {
pa_cvolume v;
@@ -1260,7 +1285,7 @@ void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume, bool s
return;
}
- i->volume = *volume;
+ set_volume_internal(i, volume);
i->save_volume = save;
if (pa_sink_flat_volume_enabled(i->sink)) {
@@ -1278,13 +1303,6 @@ void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume, bool s
/* Copy the new soft_volume to the thread_info struct */
pa_assert_se(pa_asyncmsgq_send(i->sink->asyncmsgq, PA_MSGOBJECT(i), PA_SINK_INPUT_MESSAGE_SET_SOFT_VOLUME, NULL, 0, NULL) == 0);
}
-
- /* The volume changed, let's tell people so */
- if (i->volume_changed)
- i->volume_changed(i);
-
- /* The virtual volume changed, let's tell people so */
- pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
}
void pa_sink_input_add_volume_factor(pa_sink_input *i, const char *key, const pa_cvolume *volume_factor) {
@@ -1635,7 +1653,6 @@ int pa_sink_input_start_move(pa_sink_input *i) {
* then also the origin sink and all streams connected to it need to update
* their volume - this function does all that by using recursion. */
static void update_volume_due_to_moving(pa_sink_input *i, pa_sink *dest) {
- pa_cvolume old_volume;
pa_cvolume new_volume;
pa_assert(i);
@@ -1685,19 +1702,11 @@ static void update_volume_due_to_moving(pa_sink_input *i, pa_sink *dest) {
* always have volume_factor as soft_volume, so no change
* should be needed) */
- old_volume = i->volume;
- pa_cvolume_reset(&i->volume, i->volume.channels);
+ pa_cvolume_reset(&new_volume, i->volume.channels);
+ set_volume_internal(i, &new_volume);
pa_cvolume_reset(&i->reference_ratio, i->reference_ratio.channels);
pa_assert(pa_cvolume_is_norm(&i->real_ratio));
pa_assert(pa_cvolume_equal(&i->soft_volume, &i->volume_factor));
-
- /* Notify others about the changed sink input volume. */
- if (!pa_cvolume_equal(&i->volume, &old_volume)) {
- if (i->volume_changed)
- i->volume_changed(i);
-
- pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
- }
}
/* Additionally, the origin sink volume needs updating:
@@ -1729,8 +1738,6 @@ static void update_volume_due_to_moving(pa_sink_input *i, pa_sink *dest) {
update_volume_due_to_moving(origin_sink_input, dest);
} else {
- old_volume = i->volume;
-
if (pa_sink_flat_volume_enabled(i->sink)) {
/* Ok, so this is a regular stream, and flat volume is enabled. The
* volume will have to be updated as follows:
@@ -1742,9 +1749,10 @@ static void update_volume_due_to_moving(pa_sink_input *i, pa_sink *dest) {
* i->soft_volume := i->real_ratio * i->volume_factor
* (handled later by pa_sink_set_volume) */
- i->volume = i->sink->reference_volume;
- pa_cvolume_remap(&i->volume, &i->sink->channel_map, &i->channel_map);
- pa_sw_cvolume_multiply(&i->volume, &i->volume, &i->reference_ratio);
+ new_volume = i->sink->reference_volume;
+ pa_cvolume_remap(&new_volume, &i->sink->channel_map, &i->channel_map);
+ pa_sw_cvolume_multiply(&new_volume, &new_volume, &i->reference_ratio);
+ set_volume_internal(i, &new_volume);
} else {
/* Ok, so this is a regular stream, and flat volume is disabled.
@@ -1755,21 +1763,10 @@ static void update_volume_due_to_moving(pa_sink_input *i, pa_sink *dest) {
* i->real_ratio := i->reference_ratio
* i->soft_volume := i->real_ratio * i->volume_factor */
- i->volume = i->reference_ratio;
+ set_volume_internal(i, &i->reference_ratio);
i->real_ratio = i->reference_ratio;
pa_sw_cvolume_multiply(&i->soft_volume, &i->real_ratio, &i->volume_factor);
}
-
- /* Notify others about the changed sink input volume. */
- if (!pa_cvolume_equal(&i->volume, &old_volume)) {
- /* XXX: In case i->sink has flat volume enabled, then real_ratio
- * and soft_volume are not updated yet. Let's hope that the
- * callback implementation doesn't care about those variables... */
- if (i->volume_changed)
- i->volume_changed(i);
-
- pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
- }
}
/* If i->sink == dest, then recursion has finished, and we can finally call
@@ -2246,3 +2243,11 @@ int pa_sink_input_update_rate(pa_sink_input *i) {
return 0;
}
+
+/* Called from the main thread. */
+void pa_sink_input_set_volume_direct(pa_sink_input *i, const pa_cvolume *volume) {
+ pa_assert(i);
+ pa_assert(volume);
+
+ set_volume_internal(i, volume);
+}
diff --git a/src/pulsecore/sink-input.h b/src/pulsecore/sink-input.h
index da33717..2299ea3 100644
--- a/src/pulsecore/sink-input.h
+++ b/src/pulsecore/sink-input.h
@@ -417,6 +417,11 @@ bool pa_sink_input_process_underrun(pa_sink_input *i);
pa_memchunk* pa_sink_input_get_silence(pa_sink_input *i, pa_memchunk *ret);
+/* Called from the main thread, from sink.c only. This function simply sets
+ * i->volume and fires the change notifications. This is an internal function
+ * of the flat volume algorithm. */
+void pa_sink_input_set_volume_direct(pa_sink_input *i, const pa_cvolume *volume);
+
#define pa_sink_input_assert_io_context(s) \
pa_assert(pa_thread_mq_get() || !PA_SINK_INPUT_IS_LINKED((s)->state))
diff --git a/src/pulsecore/sink.c b/src/pulsecore/sink.c
index 45adee3..a0e46c5 100644
--- a/src/pulsecore/sink.c
+++ b/src/pulsecore/sink.c
@@ -1835,20 +1835,13 @@ static void update_real_volume(pa_sink *s, const pa_cvolume *new_volume, pa_chan
PA_IDXSET_FOREACH(i, s->inputs, idx) {
if (i->origin_sink && (i->origin_sink->flags & PA_SINK_SHARE_VOLUME_WITH_MASTER)) {
if (pa_sink_flat_volume_enabled(s)) {
- pa_cvolume old_volume = i->volume;
+ pa_cvolume new_input_volume;
/* Follow the root sink's real volume. */
- i->volume = *new_volume;
- pa_cvolume_remap(&i->volume, channel_map, &i->channel_map);
+ new_input_volume = *new_volume;
+ pa_cvolume_remap(&new_input_volume, channel_map, &i->channel_map);
+ pa_sink_input_set_volume_direct(i, &new_input_volume);
compute_reference_ratio(i);
-
- /* The volume changed, let's tell people so */
- if (!pa_cvolume_equal(&old_volume, &i->volume)) {
- if (i->volume_changed)
- i->volume_changed(i);
-
- pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
- }
}
update_real_volume(i->origin_sink, new_volume, channel_map);
@@ -1903,7 +1896,7 @@ static void propagate_reference_volume(pa_sink *s) {
* sink input volumes accordingly */
PA_IDXSET_FOREACH(i, s->inputs, idx) {
- pa_cvolume old_volume;
+ pa_cvolume new_volume;
if (i->origin_sink && (i->origin_sink->flags & PA_SINK_SHARE_VOLUME_WITH_MASTER)) {
propagate_reference_volume(i->origin_sink);
@@ -1914,24 +1907,14 @@ static void propagate_reference_volume(pa_sink *s) {
continue;
}
- old_volume = i->volume;
-
/* This basically calculates:
*
* i->volume := s->reference_volume * i->reference_ratio */
- i->volume = s->reference_volume;
- pa_cvolume_remap(&i->volume, &s->channel_map, &i->channel_map);
- pa_sw_cvolume_multiply(&i->volume, &i->volume, &i->reference_ratio);
-
- /* The volume changed, let's tell people so */
- if (!pa_cvolume_equal(&old_volume, &i->volume)) {
-
- if (i->volume_changed)
- i->volume_changed(i);
-
- pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
- }
+ new_volume = s->reference_volume;
+ pa_cvolume_remap(&new_volume, &s->channel_map, &i->channel_map);
+ pa_sw_cvolume_multiply(&new_volume, &new_volume, &i->reference_ratio);
+ pa_sink_input_set_volume_direct(i, &new_volume);
}
}
@@ -2150,7 +2133,7 @@ static void propagate_real_volume(pa_sink *s, const pa_cvolume *old_real_volume)
if (pa_sink_flat_volume_enabled(s)) {
PA_IDXSET_FOREACH(i, s->inputs, idx) {
- pa_cvolume old_volume = i->volume;
+ pa_cvolume new_volume;
/* 2. Since the sink's reference and real volumes are equal
* now our ratios should be too. */
@@ -2164,18 +2147,10 @@ static void propagate_real_volume(pa_sink *s, const pa_cvolume *old_real_volume)
* i->volume = s->reference_volume * i->reference_ratio
*
* This is identical to propagate_reference_volume() */
- i->volume = s->reference_volume;
- pa_cvolume_remap(&i->volume, &s->channel_map, &i->channel_map);
- pa_sw_cvolume_multiply(&i->volume, &i->volume, &i->reference_ratio);
-
- /* Notify if something changed */
- if (!pa_cvolume_equal(&old_volume, &i->volume)) {
-
- if (i->volume_changed)
- i->volume_changed(i);
-
- pa_subscription_post(i->core, PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_CHANGE, i->index);
- }
+ new_volume = s->reference_volume;
+ pa_cvolume_remap(&new_volume, &s->channel_map, &i->channel_map);
+ pa_sw_cvolume_multiply(&new_volume, &new_volume, &i->reference_ratio);
+ pa_sink_input_set_volume_direct(i, &new_volume);
if (i->origin_sink && (i->origin_sink->flags & PA_SINK_SHARE_VOLUME_WITH_MASTER))
propagate_real_volume(i->origin_sink, old_real_volume);
diff --git a/src/pulsecore/source-output.c b/src/pulsecore/source-output.c
index cac391e..22fa6d7 100644
--- a/src/pulsecore/source-output.c
+++ b/src/pulsecore/source-output.c
@@ -940,6 +940,31 @@ pa_usec_t pa_source_output_get_requested_latency(pa_source_output *o) {
return o->thread_info.requested_source_latency;
}
+/* Called from the main thread. */
+static void set_volume_internal(pa_source_output *o, 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(o);
+ pa_assert(volume);
+
+ old_volume = o->volume;
+
+ if (pa_cvolume_equal(volume, &old_volume))
+ return;
+
+ o->volume = *volume;
+ pa_log_debug("The volume of source output %u changed from %s to %s.", o->index,
+ pa_cvolume_snprint_verbose(old_volume_str, sizeof(old_volume_str), &old_volume, &o->channel_map, true),
+ pa_cvolume_snprint_verbose(new_volume_str, sizeof(new_volume_str), volume, &o->channel_map, true));
+
+ if (o->volume_changed)
+ o->volume_changed(o);
+
+ pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
+}
+
/* Called from main context */
void pa_source_output_set_volume(pa_source_output *o, const pa_cvolume *volume, bool save, bool absolute) {
pa_cvolume v;
@@ -972,7 +997,7 @@ void pa_source_output_set_volume(pa_source_output *o, const pa_cvolume *volume,
return;
}
- o->volume = *volume;
+ set_volume_internal(o, volume);
o->save_volume = save;
if (pa_source_flat_volume_enabled(o->source)) {
@@ -1262,7 +1287,6 @@ int pa_source_output_start_move(pa_source_output *o) {
* then also the origin source and all streams connected to it need to update
* their volume - this function does all that by using recursion. */
static void update_volume_due_to_moving(pa_source_output *o, pa_source *dest) {
- pa_cvolume old_volume;
pa_cvolume new_volume;
pa_assert(o);
@@ -1314,19 +1338,11 @@ static void update_volume_due_to_moving(pa_source_output *o, pa_source *dest) {
* always have volume_factor as soft_volume, so no change
* should be needed) */
- old_volume = o->volume;
- pa_cvolume_reset(&o->volume, o->volume.channels);
+ pa_cvolume_reset(&new_volume, o->volume.channels);
+ set_volume_internal(o, &new_volume);
pa_cvolume_reset(&o->reference_ratio, o->reference_ratio.channels);
pa_assert(pa_cvolume_is_norm(&o->real_ratio));
pa_assert(pa_cvolume_equal(&o->soft_volume, &o->volume_factor));
-
- /* Notify others about the changed source output volume. */
- if (!pa_cvolume_equal(&o->volume, &old_volume)) {
- if (o->volume_changed)
- o->volume_changed(o);
-
- pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
- }
}
/* Additionally, the origin source volume needs updating:
@@ -1358,8 +1374,6 @@ static void update_volume_due_to_moving(pa_source_output *o, pa_source *dest) {
update_volume_due_to_moving(destination_source_output, dest);
} else {
- old_volume = o->volume;
-
if (pa_source_flat_volume_enabled(o->source)) {
/* Ok, so this is a regular stream, and flat volume is enabled. The
* volume will have to be updated as follows:
@@ -1371,9 +1385,10 @@ static void update_volume_due_to_moving(pa_source_output *o, pa_source *dest) {
* o->soft_volume := o->real_ratio * o->volume_factor
* (handled later by pa_source_set_volume) */
- o->volume = o->source->reference_volume;
- pa_cvolume_remap(&o->volume, &o->source->channel_map, &o->channel_map);
- pa_sw_cvolume_multiply(&o->volume, &o->volume, &o->reference_ratio);
+ new_volume = o->source->reference_volume;
+ pa_cvolume_remap(&new_volume, &o->source->channel_map, &o->channel_map);
+ pa_sw_cvolume_multiply(&new_volume, &new_volume, &o->reference_ratio);
+ set_volume_internal(o, &new_volume);
} else {
/* Ok, so this is a regular stream, and flat volume is disabled.
@@ -1384,21 +1399,10 @@ static void update_volume_due_to_moving(pa_source_output *o, pa_source *dest) {
* o->real_ratio := o->reference_ratio
* o->soft_volume := o->real_ratio * o->volume_factor */
- o->volume = o->reference_ratio;
+ set_volume_internal(o, &o->reference_ratio);
o->real_ratio = o->reference_ratio;
pa_sw_cvolume_multiply(&o->soft_volume, &o->real_ratio, &o->volume_factor);
}
-
- /* Notify others about the changed source output volume. */
- if (!pa_cvolume_equal(&o->volume, &old_volume)) {
- /* XXX: In case o->source has flat volume enabled, then real_ratio
- * and soft_volume are not updated yet. Let's hope that the
- * callback implementation doesn't care about those variables... */
- if (o->volume_changed)
- o->volume_changed(o);
-
- pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
- }
}
/* If o->source == dest, then recursion has finished, and we can finally call
@@ -1692,3 +1696,11 @@ int pa_source_output_update_rate(pa_source_output *o) {
return 0;
}
+
+/* Called from the main thread. */
+void pa_source_output_set_volume_direct(pa_source_output *o, const pa_cvolume *volume) {
+ pa_assert(o);
+ pa_assert(volume);
+
+ set_volume_internal(o, volume);
+}
diff --git a/src/pulsecore/source-output.h b/src/pulsecore/source-output.h
index 102fb8b..c21b9f3 100644
--- a/src/pulsecore/source-output.h
+++ b/src/pulsecore/source-output.h
@@ -353,6 +353,11 @@ int pa_source_output_process_msg(pa_msgobject *mo, int code, void *userdata, int
pa_usec_t pa_source_output_set_requested_latency_within_thread(pa_source_output *o, pa_usec_t usec);
+/* Called from the main thread, from source.c only. This function simply sets
+ * o->volume and fires the change notifications. This is an internal function
+ * of the flat volume algorithm. */
+void pa_source_output_set_volume_direct(pa_source_output *o, const pa_cvolume *volume);
+
#define pa_source_output_assert_io_context(s) \
pa_assert(pa_thread_mq_get() || !PA_SOURCE_OUTPUT_IS_LINKED((s)->state))
diff --git a/src/pulsecore/source.c b/src/pulsecore/source.c
index 93ff4be..5323ce7 100644
--- a/src/pulsecore/source.c
+++ b/src/pulsecore/source.c
@@ -1429,20 +1429,13 @@ static void update_real_volume(pa_source *s, const pa_cvolume *new_volume, pa_ch
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 old_volume = o->volume;
+ pa_cvolume new_output_volume;
/* Follow the root source's real volume. */
- o->volume = *new_volume;
- pa_cvolume_remap(&o->volume, channel_map, &o->channel_map);
+ 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);
-
- /* The volume changed, let's tell people so */
- if (!pa_cvolume_equal(&old_volume, &o->volume)) {
- if (o->volume_changed)
- o->volume_changed(o);
-
- pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
- }
}
update_real_volume(o->destination_source, new_volume, channel_map);
@@ -1497,7 +1490,7 @@ static void propagate_reference_volume(pa_source *s) {
* source output volumes accordingly */
PA_IDXSET_FOREACH(o, s->outputs, idx) {
- pa_cvolume old_volume;
+ pa_cvolume new_volume;
if (o->destination_source && (o->destination_source->flags & PA_SOURCE_SHARE_VOLUME_WITH_MASTER)) {
propagate_reference_volume(o->destination_source);
@@ -1508,24 +1501,14 @@ static void propagate_reference_volume(pa_source *s) {
continue;
}
- old_volume = o->volume;
-
/* This basically calculates:
*
* o->volume := o->reference_volume * o->reference_ratio */
- o->volume = s->reference_volume;
- pa_cvolume_remap(&o->volume, &s->channel_map, &o->channel_map);
- pa_sw_cvolume_multiply(&o->volume, &o->volume, &o->reference_ratio);
-
- /* The volume changed, let's tell people so */
- if (!pa_cvolume_equal(&old_volume, &o->volume)) {
-
- if (o->volume_changed)
- o->volume_changed(o);
-
- pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
- }
+ 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);
}
}
@@ -1742,9 +1725,8 @@ static void propagate_real_volume(pa_source *s, const pa_cvolume *old_real_volum
}
if (pa_source_flat_volume_enabled(s)) {
-
PA_IDXSET_FOREACH(o, s->outputs, idx) {
- pa_cvolume old_volume = o->volume;
+ pa_cvolume new_volume;
/* 2. Since the source's reference and real volumes are equal
* now our ratios should be too. */
@@ -1758,18 +1740,10 @@ static void propagate_real_volume(pa_source *s, const pa_cvolume *old_real_volum
* o->volume = s->reference_volume * o->reference_ratio
*
* This is identical to propagate_reference_volume() */
- o->volume = s->reference_volume;
- pa_cvolume_remap(&o->volume, &s->channel_map, &o->channel_map);
- pa_sw_cvolume_multiply(&o->volume, &o->volume, &o->reference_ratio);
-
- /* Notify if something changed */
- if (!pa_cvolume_equal(&old_volume, &o->volume)) {
-
- if (o->volume_changed)
- o->volume_changed(o);
-
- pa_subscription_post(o->core, PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT|PA_SUBSCRIPTION_EVENT_CHANGE, o->index);
- }
+ 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);
--
1.8.3.1
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