From 7cdce8cb55e7af25b88b45b6338402baad1e9ec9 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 21 Dec 2014 00:54:36 +0100 Subject: [PATCH] avfilter/vf_boxblur: factor rounder offset out 3322 -> 3204 cycles Signed-off-by: Michael Niedermayer --- libavfilter/vf_boxblur.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/libavfilter/vf_boxblur.c b/libavfilter/vf_boxblur.c index 1fa5135d98..a908b6d125 100644 --- a/libavfilter/vf_boxblur.c +++ b/libavfilter/vf_boxblur.c @@ -227,19 +227,21 @@ static inline void blur(uint8_t *dst, int dst_step, const uint8_t *src, int src_ sum += src[x*src_step]<<1; sum += src[radius*src_step]; + sum = sum*inv + (1<<15); + for (x = 0; x <= radius; x++) { - sum += src[(radius+x)*src_step] - src[(radius-x)*src_step]; - dst[x*dst_step] = (sum*inv + (1<<15))>>16; + sum += (src[(radius+x)*src_step] - src[(radius-x)*src_step])*inv; + dst[x*dst_step] = sum>>16; } for (; x < len-radius; x++) { - sum += src[(radius+x)*src_step] - src[(x-radius-1)*src_step]; - dst[x*dst_step] = (sum*inv + (1<<15))>>16; + sum += (src[(radius+x)*src_step] - src[(x-radius-1)*src_step])*inv; + dst[x*dst_step] = sum >>16; } for (; x < len; x++) { - sum += src[(2*len-radius-x-1)*src_step] - src[(x-radius-1)*src_step]; - dst[x*dst_step] = (sum*inv + (1<<15))>>16; + sum += (src[(2*len-radius-x-1)*src_step] - src[(x-radius-1)*src_step])*inv; + dst[x*dst_step] = sum>>16; } }