From 8f14170b9a4e0fcb5525e5408c8df14076ec8948 Mon Sep 17 00:00:00 2001 From: Marton Balint Date: Sun, 30 Sep 2018 23:28:28 +0200 Subject: avfilter/filters: add ff_inlink_peek_frame and ff_inlink_queued_frames to access frames in the inlink fifo Signed-off-by: Marton Balint --- libavfilter/avfilter.c | 10 ++++++++++ libavfilter/filters.h | 13 +++++++++++++ 2 files changed, 23 insertions(+) (limited to 'libavfilter') diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c index 90799d450c..27d163f79a 100644 --- a/libavfilter/avfilter.c +++ b/libavfilter/avfilter.c @@ -1448,6 +1448,11 @@ int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts return 1; } +size_t ff_inlink_queued_frames(AVFilterLink *link) +{ + return ff_framequeue_queued_frames(&link->fifo); +} + int ff_inlink_check_available_frame(AVFilterLink *link) { return ff_framequeue_queued_frames(&link->fifo) > 0; @@ -1507,6 +1512,11 @@ int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max, return 1; } +AVFrame *ff_inlink_peek_frame(AVFilterLink *link, size_t idx) +{ + return ff_framequeue_peek(&link->fifo, idx); +} + int ff_inlink_make_frame_writable(AVFilterLink *link, AVFrame **rframe) { AVFrame *frame = *rframe; diff --git a/libavfilter/filters.h b/libavfilter/filters.h index 4e2652ebe5..ff900da63f 100644 --- a/libavfilter/filters.h +++ b/libavfilter/filters.h @@ -60,6 +60,12 @@ int ff_inlink_process_commands(AVFilterLink *link, const AVFrame *frame); */ int ff_inlink_evaluate_timeline_at_frame(AVFilterLink *link, const AVFrame *frame); +/** + * Get the number of frames available on the link. + * @return the number of frames available in the link fifo. + */ +size_t ff_inlink_queued_frames(AVFilterLink *link); + /** * Test if a frame is available on the link. * @return >0 if a frame is available @@ -102,6 +108,13 @@ int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe); int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max, AVFrame **rframe); +/** + * Access a frame in the link fifo without consuming it. + * The first frame is numbered 0; the designated frame must exist. + * @return the frame at idx position in the link fifo. + */ +AVFrame *ff_inlink_peek_frame(AVFilterLink *link, size_t idx); + /** * Make sure a frame is writable. * This is similar to av_frame_make_writable() except it uses the link's -- cgit v1.2.3