Anton Khirnov <[email protected]> writes:

> From: Stefano Sabatini <[email protected]>
>
> The format is a per-frame property, having it in AVFrame simplify the
> operation of extraction of that information, since avoids the need to
> access the codec/stream context.
> ---
>  libavcodec/avcodec.h |    9 +++++++++
>  libavcodec/utils.c   |    5 +++++
>  2 files changed, 14 insertions(+), 0 deletions(-)
>
> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
> index 9cee89d..fdcd844 100644
> --- a/libavcodec/avcodec.h
> +++ b/libavcodec/avcodec.h
> @@ -1272,6 +1272,15 @@ typedef struct AVFrame {
>       * - decoding: Read by user.
>       */
>      int width, height;
> +
> +    /**
> +     * format of the frame, -1 if unknown or unset
> +     * It should be cast to the corresponding enum (enum PixelFormat
> +     * for video, enum AVSampleFormat for audio)
> +     * - encoding: unused
> +     * - decoding: Read by user.
> +     */
> +    int format;
>  } AVFrame;

The comment could be better worded.  Remove the nonsense about casting
for starters.  An enum is an integer, there's no casting involved.

When does the pixel/sample format change from one frame to the next?

-- 
Måns Rullgård
[email protected]
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