[FFmpeg-devel] [PATCH 1/2] VC1: simplify a calculation in a loop.
Kostya
kostya.shishkov
Thu Feb 17 22:03:45 CET 2011
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
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