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fftools/sync_queue: support operation with no limiting streams 

ffmpeg CLI will not create such queues currently, but this will become
useful in following commits.
This commit is contained in:
Anton Khirnov 2023-03-22 12:03:16 +01:00
parent 98b41d0bd2
commit 9a85245adf
1 changed files with 6 additions and 1 deletions
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7
fftools/sync_queue.c
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@ -96,6 +96,8 @@ struct SyncQueue {
// pool of preallocated frames to avoid constant allocations
ObjPool *pool;
int have_limiting;
};
static void frame_move(const SyncQueue *sq, SyncQueueFrame dst,
@ -354,8 +356,9 @@ static int receive_for_stream(SyncQueue *sq, unsigned int stream_idx,
/* We can release frames that do not end after the queue head.
* Frames with no timestamps are just passed through with no conditions.
* Frames are also passed through when there are no limiting streams.
*/
if (cmp <= 0 || ts == AV_NOPTS_VALUE) {
if (cmp <= 0 || ts == AV_NOPTS_VALUE || !sq->have_limiting) {
frame_move(sq, frame, peek);
objpool_release(sq->pool, (void**)&peek);
av_fifo_drain2(st->fifo, 1);
@ -427,6 +430,8 @@ int sq_add_stream(SyncQueue *sq, int limiting)
st->frames_max = UINT64_MAX;
st->limiting = limiting;
sq->have_limiting |= limiting;
return sq->nb_streams++;
}