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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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44
src/pulsecore/sink-input.c
View file

@ -55,6 +55,39 @@ static void sink_input_volume_ramping(pa_sink_input* i, pa_memchunk* chunk);
static void sink_input_rewind_ramp_info(pa_sink_input *i, size_t nbytes);
static void sink_input_release_envelope(pa_sink_input *i);
static int check_passthrough_connection(pa_sink_input_flags_t flags, pa_sink *dest) {
if (dest->flags & PA_SINK_PASSTHROUGH) {
if (pa_idxset_size(dest->inputs) > 0) {
pa_sink_input *alt_i;
uint32_t idx;
alt_i = pa_idxset_first(dest->inputs, &idx);
/* only need to check the first input is not PASSTHROUGH */
if (alt_i->flags & PA_SINK_INPUT_PASSTHROUGH) {
pa_log_warn("Sink is already connected to PASSTHROUGH input");
return -PA_ERR_BUSY;
}
/* Current inputs are PCM, check new input is not PASSTHROUGH */
if (flags & PA_SINK_INPUT_PASSTHROUGH) {
pa_log_warn("Sink is already connected, cannot accept new PASSTHROUGH INPUT");
return -PA_ERR_BUSY;
}
}
} else {
if (flags & PA_SINK_INPUT_PASSTHROUGH) {
pa_log_warn("Cannot connect PASSTHROUGH sink input to sink without PASSTHROUGH capabilities");
return -PA_ERR_INVALID;
}
}
return PA_OK;
}
pa_sink_input_new_data* pa_sink_input_new_data_init(pa_sink_input_new_data *data) {
pa_assert(data);
@ -183,6 +216,9 @@ int pa_sink_input_new(
pa_return_val_if_fail(PA_SINK_IS_LINKED(pa_sink_get_state(data->sink)), -PA_ERR_BADSTATE);
pa_return_val_if_fail(!data->sync_base || (data->sync_base->sink == data->sink && pa_sink_input_get_state(data->sync_base) == PA_SINK_INPUT_CORKED), -PA_ERR_INVALID);
r = check_passthrough_connection(data->flags, data->sink);
pa_return_val_if_fail(r == PA_OK, r);
if (!data->sample_spec_is_set)
data->sample_spec = data->sink->sample_spec;
@ -1020,6 +1056,11 @@ static void set_real_ratio(pa_sink_input *i, const pa_cvolume *v) {
/* Called from main context */
void pa_sink_input_set_volume(pa_sink_input *i, const pa_cvolume *volume, pa_bool_t save, pa_bool_t absolute) {
/* Do not allow for volume changes for non-audio types */
if (i->flags & PA_SINK_INPUT_PASSTHROUGH)
return;
/* test ramping -> return pa_sink_input_set_volume_with_ramping(i, volume, save, absolute, 2000 * PA_USEC_PER_MSEC); */
return pa_sink_input_set_volume_with_ramping(i, volume, save, absolute, 0);
}
@ -1162,6 +1203,9 @@ pa_bool_t pa_sink_input_may_move_to(pa_sink_input *i, pa_sink *dest) {
return FALSE;
}
if (check_passthrough_connection(i->flags, dest) < 0)
return FALSE;
if (i->may_move_to)
if (!i->may_move_to(i, dest))
return FALSE;