mirror of https://git.ffmpeg.org/ffmpeg.git
avfilter/vf_boxblur: factor rounder offset out
3322 -> 3204 cycles Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -227,19 +227,21 @@ static inline void blur(uint8_t *dst, int dst_step, const uint8_t *src, int src_
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sum += src[x*src_step]<<1;
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sum += src[x*src_step]<<1;
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sum += src[radius*src_step];
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sum += src[radius*src_step];
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sum = sum*inv + (1<<15);
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for (x = 0; x <= radius; x++) {
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for (x = 0; x <= radius; x++) {
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sum += src[(radius+x)*src_step] - src[(radius-x)*src_step];
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sum += (src[(radius+x)*src_step] - src[(radius-x)*src_step])*inv;
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dst[x*dst_step] = (sum*inv + (1<<15))>>16;
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dst[x*dst_step] = sum>>16;
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}
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}
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for (; x < len-radius; x++) {
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for (; x < len-radius; x++) {
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sum += src[(radius+x)*src_step] - src[(x-radius-1)*src_step];
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sum += (src[(radius+x)*src_step] - src[(x-radius-1)*src_step])*inv;
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dst[x*dst_step] = (sum*inv + (1<<15))>>16;
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dst[x*dst_step] = sum >>16;
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}
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}
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for (; x < len; x++) {
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for (; x < len; x++) {
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sum += src[(2*len-radius-x-1)*src_step] - src[(x-radius-1)*src_step];
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sum += (src[(2*len-radius-x-1)*src_step] - src[(x-radius-1)*src_step])*inv;
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dst[x*dst_step] = (sum*inv + (1<<15))>>16;
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dst[x*dst_step] = sum>>16;
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}
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}
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}
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}
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