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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>
This commit is contained in:
Marton Balint 2018-09-30 23:28:28 +02:00
parent 9344322573
commit 8f14170b9a
2 changed files with 23 additions and 0 deletions
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10
libavfilter/avfilter.c
View File

@ -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;

13
libavfilter/filters.h
View File

@ -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