small optimization

Originally committed as revision 7327 to svn://svn.ffmpeg.org/ffmpeg/trunk
18 years ago · c29ff23c2a
parent af6a403a05
commit c29ff23c2a
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/vp6.c
+++ b/libavcodec/vp6.c
@ -343,7 +343,7 @@ static int vp6_block_variance(uint8_t *src, int stride)
        }
        src += 2*stride;
    }
-    return (16*square_sum - sum*sum) / (16*16);
+    return (16*square_sum - sum*sum) >> 8;
 }

 static void vp6_filter_hv2(vp56_context_t *s, uint8_t *dst, uint8_t *src,