[FFmpeg-devel] [PATCH] hevc: Fix scaling list prediction delta for the 32x32 inter matrix

[Mark Thompson]

On 30/04/17 13:34, Mark Thompson wrote:
> Fixes ticket #6356.
> ---
> This was broken in 627c044f50da3046809314f7cc742b8a10cf26a1, which changed the array index of the 32x32 inter matrix but missed this case.
> 
> Sample at <https://trac.ffmpeg.org/ticket/6356> - with this change the output for that sample matches the reference decoder.
> 
> 
>  libavcodec/hevc_ps.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c
> index 6d67dd9c69..3e00e4b3f3 100644
> --- a/libavcodec/hevc_ps.c
> +++ b/libavcodec/hevc_ps.c
> @@ -719,6 +719,7 @@ static int scaling_list_data(GetBitContext *gb, AVCodecContext *avctx, ScalingLi
>                   * which should already be in the arrays. */
>                  if (delta) {
>                      // Copy from previous array.
> +                    delta *= (size_id == 3) ? 3 : 1;
>                      if (matrix_id < delta) {
>                          av_log(avctx, AV_LOG_ERROR,
>                                 "Invalid delta in scaling list data: %d.\n", delta);
> 

Ping.