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Use explicit output parameter for skipped frame

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The function video_buffer_offer_decoded_frame() returned a bool to
indicate whether the previous frame had been consumed.

This was confusing, because we could expect the returned bool report
whether the action succeeded.

Make the semantic explicit by using an output parameter.

Also revert the flag (report if the frame has been skipped instead of
consumed) to avoid confusion for the first frame (the previous is
neither skipped nor consumed because there is no previous frame).
This commit is contained in:
Romain Vimont 2019-03-03 00:26:48 +01:00
parent 9ef345fdd0
commit 8595862005
3 changed files with 12 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

8
app/src/video_buffer.c
View file

@ -63,8 +63,9 @@ video_buffer_swap_frames(struct video_buffer *vb) {
vb->rendering_frame = tmp;
}
bool
video_buffer_offer_decoded_frame(struct video_buffer *vb) {
void
video_buffer_offer_decoded_frame(struct video_buffer *vb,
bool *previous_frame_skipped) {
mutex_lock(vb->mutex);
#ifndef SKIP_FRAMES
// if SKIP_FRAMES is disabled, then the decoder must wait for the current
@ -80,11 +81,10 @@ video_buffer_offer_decoded_frame(struct video_buffer *vb) {
video_buffer_swap_frames(vb);
bool previous_frame_consumed = vb->rendering_frame_consumed;
*previous_frame_skipped = !vb->rendering_frame_consumed;
vb->rendering_frame_consumed = false;
mutex_unlock(vb->mutex);
return previous_frame_consumed;
}
const AVFrame *