Re: [FFmpeg-devel] [PATCH 7/7] avcodec/gemdec: Move all support checks before before image allocation

[Peter Ross]

On Sun, Dec 05, 2021 at 10:19:07PM +0100, Michael Niedermayer wrote:
> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
> ---
>  libavcodec/gemdec.c | 32 +++++++++++++++++++++-----------
>  1 file changed, 21 insertions(+), 11 deletions(-)
> 
> diff --git a/libavcodec/gemdec.c b/libavcodec/gemdec.c
> index eee21a50d4b..fd14b22390c 100644
> --- a/libavcodec/gemdec.c
> +++ b/libavcodec/gemdec.c
> @@ -157,10 +157,22 @@ static int gem_decode_frame(AVCodecContext *avctx,
>      if (header_size >= 11)
>          tag = bytestream2_peek_be32(&gb);
>  
> -    if (tag == AV_RB32("STTT") || tag == AV_RB32("TIMG") || tag == 
> AV_RB32("XIMG") ||
> -        planes == 1 || planes == 2 || planes == 3 || planes == 4 ||
> -        planes == 8 || planes == 16 || planes == 24) {
> -    } else {
> +    if (tag == AV_RB32("STTT")) {
> +        if (planes != 4) {
> +            avpriv_request_sample(avctx, "STTT planes=%d", planes);
> +            return AVERROR_PATCHWELCOME;
> +        }
> +    } else if (tag == AV_RB32("TIMG")) {
> +        if (planes != 15) {
> +            avpriv_request_sample(avctx, "TIMG planes=%d", planes);
> +            return AVERROR_PATCHWELCOME;
> +        }
> +    } else if (tag == AV_RB32("XIMG")) {
> +        if (planes != 1 && planes != 2 && planes != 4 && planes != 8 && 
> planes != 16 && planes != 24 && planes != 32) {
> +            avpriv_request_sample(avctx, "XIMG planes=%d", planes);
> +            return AVERROR_PATCHWELCOME;
> +        }
> +    } else if (planes != 1 && planes != 2 && planes != 3 && planes != 4 && 
> planes != 8 && planes != 16 && planes != 24) {
>          avpriv_request_sample(avctx, "planes=%d", planes);
>          return AVERROR_PATCHWELCOME;
>      }
> @@ -184,14 +196,12 @@ static int gem_decode_frame(AVCodecContext *avctx,
>                  palette[i] = 0xFF000000 | r << 16 | g << 8 | b;
>              }
>          } else {
> -            avpriv_request_sample(avctx, "STTT planes=%d", planes);
> -            return AVERROR_PATCHWELCOME;
> +            av_assert0(0);
>          }
>      } else if (tag == AV_RB32("TIMG")) {
>          bytestream2_skip(&gb, 4);
>          if (planes != 15) {
> -            avpriv_request_sample(avctx, "TIMG planes=%d", planes);
> -            return AVERROR_PATCHWELCOME;
> +            av_assert0(0);
>          }
>      } else if (tag == AV_RB32("XIMG")) {
>          bytestream2_skip(&gb, 6);
> @@ -215,8 +225,7 @@ static int gem_decode_frame(AVCodecContext *avctx,
>              row_width = avctx->width * pixel_size;
>              put_lines = put_lines_bytes;
>          } else {
> -            avpriv_request_sample(avctx, "XIMG planes=%d", planes);
> -            return AVERROR_PATCHWELCOME;
> +            av_assert0(0);
>          }
>      } else if (planes == 1) {
>          palette[0] = 0xFFFFFFFF;
> @@ -244,7 +253,8 @@ static int gem_decode_frame(AVCodecContext *avctx,
>          planes = 1;
>          row_width = avctx->width * pixel_size;
>          put_lines = put_lines_bytes;
> -    }
> +    } else
> +        av_assert0(0);
>  
>      ret = av_reallocp_array(&avctx->priv_data, planes, row_width);
>      if (ret < 0)
> -- 
> 2.17.1

please apply

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

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