Anton Khirnov:
> +struct SyncQueue {
> + enum SyncQueueType type;
> +
> + /* no more frames will be sent for any stream */
> + int finished;
> + /* sync head: the stream with the _smallest_ head timestamp
> + * this stream determines which frames can be output */
> + int head_stream;
> + /* the finished stream with the smallest finish timestamp or -1 */
> + int head_finished_stream;
> +
> + // maximum buffering duration in microseconds
> + int64_t buf_size_us;
> +
> + SyncQueueStream *streams;
> + unsigned int nb_streams;
> +
> + // pool of preallocated frames to avoid constant allocations
> + ObjPool *pool;
> + SyncQueueFrame free_frames[32];
> + unsigned int nb_free_frames;
The free_frames stuff seems unused.
> +};
> +
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