[FFmpeg-devel] [PATCH] VP8: slightly faster loopfilter sharpness logic

[Ronald S. Bultje]

Hi,

On Fri, Feb 4, 2011 at 2:37 AM, Jason Garrett-Glaser <jason at x264.com> wrote:
> ---
> ?libavcodec/vp8.c | ? ?2 +-
> ?1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/libavcodec/vp8.c b/libavcodec/vp8.c
> index dce090f..c714f0e 100644
> --- a/libavcodec/vp8.c
> +++ b/libavcodec/vp8.c
> @@ -1487,7 +1487,7 @@ static av_always_inline void filter_level_for_mb(VP8Context *s, VP8Macroblock *m
>
> ? ? interior_limit = filter_level;
> ? ? if (s->filter.sharpness) {
> - ? ? ? ?interior_limit >>= s->filter.sharpness > 4 ? 2 : 1;
> + ? ? ? ?interior_limit >>= (s->filter.sharpness+3)>>2;
> ? ? ? ? interior_limit = FFMIN(interior_limit, 9 - s->filter.sharpness);
> ? ? }
> ? ? interior_limit = FFMAX(interior_limit, 1);
> --
> 1.7.3.2.451.g1c2ab.dirty

Hm, I guess that would be slightly faster, OK for me.

Ronald