avfilter/filters: add ff_inlink_peek_frame and ff_inlink_queued_frames to access frames in the inlink fifo

Signed-off-by: Marton Balint <cus@passwd.hu>

1 files changed, 10 insertions, 0 deletions

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;