small optimization

Originally committed as revision 7327 to svn://svn.ffmpeg.org/ffmpeg/trunk

small optimization
Originally committed as revision 7327 to svn://svn.ffmpeg.org/ffmpeg/trunk
c29ff23c · Aurelien Jacobs · af6a403a · c29ff23c
Commit c29ff23c authored Dec 17, 2006 by Aurelien Jacobs
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vp6.c libavcodec/vp6.c +1 -1

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--- 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,