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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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17
src/pulse/def.h
View file

@ -289,6 +289,12 @@ typedef enum pa_stream_flags {
* device volume. If this is not specified the volume will be
* consider absolute when the sink is in flat volume mode,
* relative otherwise. \since 0.9.20 */
PA_STREAM_PASSTHROUGH = 0x80000U
/**< Used to tag content that will be rendered by passthrough sinks.
* The data will be left as is and not reformatted, resampled.
* \since 0.9.22*/
} pa_stream_flags_t;
/** \cond fulldocs */
@ -316,6 +322,7 @@ typedef enum pa_stream_flags {
#define PA_STREAM_START_UNMUTED PA_STREAM_START_UNMUTED
#define PA_STREAM_FAIL_ON_SUSPEND PA_STREAM_FAIL_ON_SUSPEND
#define PA_STREAM_RELATIVE_VOLUME PA_STREAM_RELATIVE_VOLUME
#define PA_STREAM_PASSTHROUGH PA_STREAM_PASSTHROUGH
/** \endcond */
@ -729,9 +736,15 @@ typedef enum pa_sink_flags {
/**< This sink is in flat volume mode, i.e. always the maximum of
* the volume of all connected inputs. \since 0.9.15 */
PA_SINK_DYNAMIC_LATENCY = 0x0080U
PA_SINK_DYNAMIC_LATENCY = 0x0080U,
/**< The latency can be adjusted dynamically depending on the
* needs of the connected streams. \since 0.9.15 */
PA_SINK_PASSTHROUGH = 0x0100U
/**< This sink has support for passthrough mode. The data will be left
* as is and not reformatted, resampled, mixed.
* \since 0.9.22*/
} pa_sink_flags_t;
/** \cond fulldocs */
@ -743,6 +756,8 @@ typedef enum pa_sink_flags {
#define PA_SINK_DECIBEL_VOLUME PA_SINK_DECIBEL_VOLUME
#define PA_SINK_FLAT_VOLUME PA_SINK_FLAT_VOLUME
#define PA_SINK_DYNAMIC_LATENCY PA_SINK_DYNAMIC_LATENCY
#define PA_SINK_PASSTHROUGH PA_SINK_PASSTHROUGH
/** \endcond */
/** Sink state. \since 0.9.15 */

10
src/pulse/stream.c
View file

@ -1065,7 +1065,9 @@ static int create_stream(
PA_STREAM_DONT_INHIBIT_AUTO_SUSPEND|
PA_STREAM_START_UNMUTED|
PA_STREAM_FAIL_ON_SUSPEND|
PA_STREAM_RELATIVE_VOLUME)), PA_ERR_INVALID);
PA_STREAM_RELATIVE_VOLUME|
PA_STREAM_PASSTHROUGH)), PA_ERR_INVALID);
PA_CHECK_VALIDITY(s->context, s->context->version >= 12 || !(flags & PA_STREAM_VARIABLE_RATE), PA_ERR_NOTSUPPORTED);
PA_CHECK_VALIDITY(s->context, s->context->version >= 13 || !(flags & PA_STREAM_PEAK_DETECT), PA_ERR_NOTSUPPORTED);
@ -1206,6 +1208,12 @@ static int create_stream(
}
if (s->context->version >= 18) {
if (s->direction == PA_STREAM_PLAYBACK)
pa_tagstruct_put_boolean(t, flags & (PA_STREAM_PASSTHROUGH));
}
pa_pstream_send_tagstruct(s->context->pstream, t);
pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_create_stream_callback, s, NULL);