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devices: Set certain sink/source flags automatically.

Browse source 
Some sink flags are really just a product of what callbacks
are set on the device. We still enforce a degree of sanity
that the flags match the callbacks set, but we also set the
flags automatically in our callback setter functions to
help ensure that a) people use them and b) flags & callbacks
are kept in sync.
This commit is contained in:
Colin Guthrie 2011-07-05 23:44:06 +01:00
parent ded07a5898
commit a9cf320bc1
13 changed files with 100 additions and 45 deletions
Download patch file Download diff file Expand all files Collapse all files

41
src/pulsecore/source.c
View file

@ -390,13 +390,27 @@ void pa_source_set_get_volume_callback(pa_source *s, pa_source_cb_t cb) {
void pa_source_set_set_volume_callback(pa_source *s, pa_source_cb_t cb) {
pa_assert(s);
pa_assert(!s->write_volume || cb);
s->set_volume = cb;
if (cb)
s->flags |= PA_SOURCE_HW_VOLUME_CTRL;
else
s->flags &= ~PA_SOURCE_HW_VOLUME_CTRL;
}
void pa_source_set_write_volume_callback(pa_source *s, pa_source_cb_t cb) {
pa_assert(s);
pa_assert(!cb || s->set_volume);
s->write_volume = cb;
if (cb)
s->flags |= PA_SOURCE_SYNC_VOLUME;
else
s->flags &= ~PA_SOURCE_SYNC_VOLUME;
}
void pa_source_set_get_mute_callback(pa_source *s, pa_source_cb_t cb) {
@ -409,6 +423,11 @@ void pa_source_set_set_mute_callback(pa_source *s, pa_source_cb_t cb) {
pa_assert(s);
s->set_mute = cb;
if (cb)
s->flags |= PA_SOURCE_HW_MUTE_CTRL;
else
s->flags &= ~PA_SOURCE_HW_MUTE_CTRL;
}
/* Called from main context */
@ -424,8 +443,18 @@ void pa_source_put(pa_source *s) {
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 volume related flags to be set
* between _new() and _put(). */
* 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_SYNC_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
@ -434,6 +463,10 @@ void pa_source_put(pa_source *s) {
* 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))
s->flags |= PA_SOURCE_DECIBEL_VOLUME;
@ -466,10 +499,6 @@ void pa_source_put(pa_source *s) {
&& ((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));
pa_assert(!(s->flags & PA_SOURCE_HW_VOLUME_CTRL) || s->set_volume);
pa_assert(!(s->flags & PA_SOURCE_SYNC_VOLUME) || (s->flags & PA_SOURCE_HW_VOLUME_CTRL));
pa_assert(!(s->flags & PA_SOURCE_SYNC_VOLUME) || s->write_volume);
pa_assert(!(s->flags & PA_SOURCE_HW_MUTE_CTRL) || s->set_mute);
pa_assert_se(source_set_state(s, PA_SOURCE_IDLE) == 0);