[PATCH 03/15] sink-input, source-output: Assign to volume from only one place

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Forcing all volume changes to go through set_volume_direct() 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    | 69 +++++++++++++++++++++----------------------
 src/pulsecore/sink-input.h    |  7 +++++
 src/pulsecore/sink.c          | 53 +++++++++------------------------
 src/pulsecore/source-output.c | 62 ++++++++++++++++++++------------------
 src/pulsecore/source-output.h |  7 +++++
 src/pulsecore/source.c        | 54 +++++++++------------------------
 6 files changed, 108 insertions(+), 144 deletions(-)

diff --git a/src/pulsecore/sink-input.c b/src/pulsecore/sink-input.c
index 279b0ed..a963a0c 100644
--- a/src/pulsecore/sink-input.c
+++ b/src/pulsecore/sink-input.c
@@ -1260,7 +1260,7 @@ void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume, bool s
         return;
     }
 
-    i->volume = *volume;
+    pa_sink_input_set_volume_direct(i, volume);
     i->save_volume = save;
 
     if (pa_sink_flat_volume_enabled(i->sink)) {
@@ -1278,13 +1278,6 @@ 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 +1628,6 @@ 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 +1677,11 @@ 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);
+            pa_sink_input_set_volume_direct(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 +1713,6 @@ 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 +1724,10 @@ 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);
+            pa_sink_input_set_volume_direct(i, &new_volume);
 
         } else {
             /* Ok, so this is a regular stream, and flat volume is disabled.
@@ -1755,21 +1738,10 @@ 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;
+            pa_sink_input_set_volume_direct(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 +2218,28 @@ 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_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);
+}
diff --git a/src/pulsecore/sink-input.h b/src/pulsecore/sink-input.h
index da33717..2be2c33 100644
--- a/src/pulsecore/sink-input.h
+++ b/src/pulsecore/sink-input.h
@@ -417,6 +417,13 @@ 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. The normal way to set the
+ * sink input volume is to call pa_sink_input_set_volume(), but the flat volume
+ * logic in sink.c needs also a function that doesn't do all the extra stuff
+ * that pa_sink_input_set_volume() does. This function simply sets i->volume
+ * and fires change notifications. */
+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 ace2e28..38b5052 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);
     }
 }
 
@@ -2126,7 +2109,7 @@ 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. */
@@ -2140,18 +2123,10 @@ 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 4323bcf..9709d77 100644
--- a/src/pulsecore/source-output.c
+++ b/src/pulsecore/source-output.c
@@ -972,7 +972,7 @@ void pa_source_output_set_volume(pa_source_output *o, const pa_cvolume *volume,
         return;
     }
 
-    o->volume = *volume;
+    pa_source_output_set_volume_direct(o, volume);
     o->save_volume = save;
 
     if (pa_source_flat_volume_enabled(o->source)) {
@@ -1262,7 +1262,6 @@ 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 +1313,11 @@ 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);
+            pa_source_output_set_volume_direct(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 +1349,6 @@ 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 +1360,10 @@ 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);
+            pa_source_output_set_volume_direct(o, &new_volume);
 
         } else {
             /* Ok, so this is a regular stream, and flat volume is disabled.
@@ -1384,21 +1374,10 @@ 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;
+            pa_source_output_set_volume_direct(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 +1671,28 @@ 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_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);
+}
diff --git a/src/pulsecore/source-output.h b/src/pulsecore/source-output.h
index 102fb8b..27d6fd4 100644
--- a/src/pulsecore/source-output.h
+++ b/src/pulsecore/source-output.h
@@ -353,6 +353,13 @@ 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. The normal way to set the
+ * source output volume is to call pa_source_output_set_volume(), but the flat
+ * volume logic in source.c needs also a function that doesn't do all the extra
+ * stuff that pa_source_output_set_volume() does. This function simply sets
+ * o->volume and fires change notifications. */
+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 5dc6583..29e312a 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);
     }
 }
 
@@ -1718,9 +1701,8 @@ 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. */
@@ -1734,18 +1716,10 @@ 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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