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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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7
src/modules/alsa/alsa-sink.c
View file

@ -1616,6 +1616,13 @@ static int setup_mixer(struct userdata *u, pa_bool_t ignore_dB) {
return 0;
}
/* FIXME: need automatic detection rather than hard-coded path */
if (!strcmp(u->mixer_path->name, "iec958-passthrough-output")) {
u->sink->flags |= PA_SINK_PASSTHROUGH;
} else {
u->sink->flags &= ~PA_SINK_PASSTHROUGH;
}
if (!u->mixer_path->has_volume)
pa_log_info("Driver does not support hardware volume control, falling back to software volume control.");
else {