Signed-off-by: Marton Balint <c...@passwd.hu>
---
libavfilter/avfilter.c | 13 +++++++++++++
libavfilter/filters.h | 14 ++++++++++++++
2 files changed, 27 insertions(+)
diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index 85eff0aa1d..9e4b8e5ca3 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 +1512,14 @@ int ff_inlink_consume_samples(AVFilterLink *link,
unsigned min, unsigned max,
return 1;
}
+AVFrame *ff_inlink_peek_frame(AVFilterLink *link, size_t idx)
+{
+ if (ff_framequeue_queued_frames(&link->fifo) > idx)
+ return ff_framequeue_peek(&link->fifo, idx);
+ else
+ return NULL;
+}
+
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..b310f1c5a8 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 +108,14 @@ 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.
+ * @return the frame at idx position in the link fifo, NULL if idx is greater
+ * or equal to the fifo size.
+ */
+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
--
2.16.4
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