[FFmpeg-devel] [PATCH 1/3] avcodec/avcodec: Add codec_tags array to AVCodec

[Anton Khirnov]

Quoting Michael Niedermayer (2019-12-30 00:38:17)
> This allows the fuzzer to target meaningfull codec tags instead
> of hunting the 4gb space, which it seems to have problems with.
> 
> Suggested-by: James
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavcodec/avcodec.h | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
> index 119b32dc1f..b0c6a8f2e3 100644
> --- a/libavcodec/avcodec.h
> +++ b/libavcodec/avcodec.h
> @@ -3634,6 +3634,12 @@ typedef struct AVCodec {
>       * The user can only access this field via avcodec_get_hw_config().
>       */
>      const struct AVCodecHWConfigInternal **hw_configs;
> +
> +    /**
> +     * List of supported codec_tags, terminated by CODEC_TAGS_END.
> +     */
> +    const uint32_t *codec_tags;
> +#define CODEC_TAGS_END -1

Is this supposed to be public or for fuzzer use only?
If the latter, then CODEC_TAGS_END doesn't need to live in a public
header.

-- 
Anton Khirnov