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Move decoder frame to decoder

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The video buffer held 3 frames:
 - the producer frame (for decoding)
 - the pending frame (to exchange between the producer and consumer)
 - the consumer frame (for rendering)

It worked well, but it prevented video buffers to be chained, because
the consumer frame of the first video buffer must be the same as the
producer frame of the second video buffer.

To solve this problem, make the decoder handle its decoding frame, and
keep only the pending and consumer frames in the video_buffer.

    decoder -> pending -> consumer -> pending -> consumer
             |---------------------||---------------------|
                  video_buffer 1         video_buffer 2

This paves the way to support asynchronous swscale.
This commit is contained in:
Romain Vimont
2021-02-21 17:39:59 +01:00
parent 9e737a1bef
commit 5cfa159e16
4 changed files with 21 additions and 21 deletions
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app/src/decoder.h
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@@ -11,6 +11,7 @@ struct video_buffer;
struct decoder {
struct video_buffer *video_buffer;
AVCodecContext *codec_ctx;
AVFrame *frame;
};
void