[FFmpeg-devel] [PATCH 1/2] VC1: simplify a calculation in a loop.

[Kostya]

On Thu, Feb 17, 2011 at 02:54:47PM -0500, Ronald S. Bultje wrote:
> ---
>  libavcodec/vc1dec.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
> index 169797c..e254d1b 100644
> --- a/libavcodec/vc1dec.c
> +++ b/libavcodec/vc1dec.c
> @@ -199,7 +199,7 @@ static void vc1_put_block(VC1Context *v, DCTELEM block[6][64])
>          for(k = 0; k < 6; k++)
>              for(j = 0; j < 8; j++)
>                  for(i = 0; i < 8; i++)
> -                    block[k][i + j*8] = ((block[k][i + j*8] - 128) << 1) + 128;
> +                    block[k][i + j*8] = (block[k][i + j*8] - 64) << 1;
>  
>      }
>      ys = v->s.current_picture.linesize[0];
> -- 
> 1.7.2.1

looks correct