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Code Issues Releases Activity

avcodec/cfhd: move if/else out of loop in inverse transform

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This commit is contained in:
Paul B Mahol 2020-07-29 10:01:35 +02:00
parent 21e86a12e6
commit fabbb680d4
1 changed files with 27 additions and 29 deletions
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56
libavcodec/cfhd.c
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@ -211,39 +211,37 @@ static inline void filter(int16_t *output, ptrdiff_t out_stride,
int16_t tmp;
int i;
for (i = 0; i < len; i++) {
if (i == 0) {
tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
if (clip)
output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
output[(2*0+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
if (clip)
output[(2*0+0)*out_stride] = av_clip_uintp2_c(output[(2*0+0)*out_stride], clip);
tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
if (clip)
output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
} else if (i == len-1) {
tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
if (clip)
output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
output[(2*0+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
if (clip)
output[(2*0+1)*out_stride] = av_clip_uintp2_c(output[(2*0+1)*out_stride], clip);
tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
if (clip)
output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
} else {
tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
if (clip)
output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
for (i = 1; i < len - 1; i++) {
tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
if (clip)
output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
if (clip)
output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
}
tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
if (clip)
output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
}
tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
if (clip)
output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
if (clip)
output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
}
static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high,