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AC3 passthrough support

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Second version after Tanu's feedback

TODO:
    - notify client that volume control is disabled
    - change sink rate in passthrough mode if needed
    - automatic detection of passthrough mode instead of hard
    coded profile names

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@intel.com>
This commit is contained in:
Pierre-Louis Bossart 2010-07-16 16:46:28 -05:00 • committed by Colin Guthrie
parent 021aa306aa
commit 9b6c84ad6e
10 changed files with 124 additions and 6 deletions
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18
src/pulsecore/sink.c
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@ -1393,6 +1393,24 @@ void pa_sink_set_volume(
pa_assert(volume || (s->flags & PA_SINK_FLAT_VOLUME));
pa_assert(!volume || volume->channels == 1 || pa_cvolume_compatible(volume, &s->sample_spec));
/* make sure we don't change the volume when a PASSTHROUGH input is connected */
if (s->flags & PA_SINK_PASSTHROUGH) {
pa_sink_input *alt_i;
uint32_t idx;
/* one and only one PASSTHROUGH input can possibly be connected */
if (pa_idxset_size(s->inputs) == 1) {
alt_i = pa_idxset_first(s->inputs, &idx);
if (alt_i->flags & PA_SINK_INPUT_PASSTHROUGH) {
/* FIXME: Need to notify client that volume control is disabled */
pa_log_warn("Cannot change volume, Sink is connected to PASSTHROUGH input");
return;
}
}
}
/* As a special exception we accept mono volumes on all sinks --
* even on those with more complex channel maps */