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Use a callback to notify a new frame

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Make the decoder independant of the SDL even mechanism, by registering a
callback on the video_buffer.
This commit is contained in:
Romain Vimont 2021-02-19 22:02:36 +01:00
parent 72df2c23f9
commit b1c7c71160
4 changed files with 46 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

18
app/src/video_buffer.c
View file

@ -7,7 +7,9 @@
#include "util/log.h"
bool
video_buffer_init(struct video_buffer *vb, bool wait_consumer) {
video_buffer_init(struct video_buffer *vb, bool wait_consumer,
const struct video_buffer_callbacks *cbs,
void *cbs_userdata) {
vb->producer_frame = av_frame_alloc();
if (!vb->producer_frame) {
goto error_0;
@ -43,6 +45,11 @@ video_buffer_init(struct video_buffer *vb, bool wait_consumer) {
// there is initially no frame, so consider it has already been consumed
vb->pending_frame_consumed = true;
assert(cbs);
assert(cbs->on_frame_available);
vb->cbs = cbs;
vb->cbs_userdata = cbs_userdata;
return true;
error_3:
@ -95,10 +102,17 @@ video_buffer_producer_offer_frame(struct video_buffer *vb,
video_buffer_swap_producer_frame(vb);
*previous_frame_skipped = !vb->pending_frame_consumed;
bool skipped = !vb->pending_frame_consumed;
*previous_frame_skipped = skipped;
vb->pending_frame_consumed = false;
sc_mutex_unlock(&vb->mutex);
if (!skipped) {
// If skipped, then the previous call will consume this frame, the
// callback must not be called
vb->cbs->on_frame_available(vb, vb->cbs_userdata);
}
}
const AVFrame *