Re: [FFmpeg-devel] [PATCH 1/4] avcodec/vp3: Don't try to decode VP4 when VP4 decoder is disabled

[Peter Ross]

On Sat, May 08, 2021 at 03:25:06AM +0200, Andreas Rheinhardt wrote:
> Otherwise decoding will crash lateron; e.g. because dct_tokens
> is never set or because a VLC that has not been allocated is used.
> 
> Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com>
> ---
>  libavcodec/vp3.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c
> index 0cae075452..9aa84e83b7 100644
> --- a/libavcodec/vp3.c
> +++ b/libavcodec/vp3.c
> @@ -2335,9 +2335,13 @@ static av_cold int vp3_decode_init(AVCodecContext 
> *avctx)
>      if (ret < 0)
>          return ret;
>  
> -    if (avctx->codec_tag == MKTAG('V', 'P', '4', '0'))
> +    if (avctx->codec_tag == MKTAG('V', 'P', '4', '0')) {
>          s->version = 3;
> -    else if (avctx->codec_tag == MKTAG('V', 'P', '3', '0'))
> +#if !CONFIG_VP4_DECODER
> +        av_log(avctx, AV_LOG_ERROR, "This build does not support decoding 
> VP4.\n");
> +        return AVERROR_DECODER_NOT_FOUND;
> +#endif
> +    } else if (avctx->codec_tag == MKTAG('V', 'P', '3', '0'))
>          s->version = 0;
>      else
>          s->version = 1;
> -- 
> 2.27.0

This patchset 1-4 all looks good to me.

-- Peter
(A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)

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