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ipc4: block mixin pipeline if no active sink 

In case mixin pipeline is running but mixout pipeline
is not -- do not discard source data but block source
pipeline until at least one sink (mixout) started.

A typical topology is to have mixin and mixout in separate
pipelines. Often, mixout pipeline is started a few milliseconds
later after mixin pipeline. In such case mixin pipeline should
be blocked until mixout pipeline started to do not loose any
audio periods.

Signed-off-by: Serhiy Katsyuba <serhiy.katsyuba@intel.com>
This commit is contained in:
Serhiy Katsyuba 2022-09-21 13:05:54 +02:00 committed by Liam Girdwood
parent cb656fe5cd
commit b6b10af036
1 changed files with 1 additions and 4 deletions
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5
src/audio/mixin_mixout.c
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@ -742,10 +742,7 @@ static int mixin_copy(struct comp_dev *dev)
bytes_to_consume_from_source_buf = 0;
if (source_avail_frames > 0) {
if (active_mixout_cnt == 0) {
/* discard source data */
comp_update_buffer_consume(source_c,
audio_stream_period_bytes(&source_c->stream,
source_avail_frames));
/* block mixin pipeline until at least one mixout pipeline started */
buffer_release(source_c);
return 0;
}