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| author | Michael Niedermayer <michaelni@gmx.at> | 2013-04-16 11:13:20 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2013-04-16 11:13:20 +0200 |
| commit | 2fa11a94a312aa072d7d14204a09582950bebccb (patch) | |
| tree | 46ffa4ab8cb987a84fe01a092ebb0988d2224532 | |
| parent | 97b2865aa27c1e50885338e594eff8af374fb41c (diff) | |
| download | ffmpeg-2fa11a94a312aa072d7d14204a09582950bebccb.tar.gz | |
sws/fill_rgb2yuv_table: avoid 2 divisions
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libswscale/utils.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libswscale/utils.c b/libswscale/utils.c index ee522c95fc..71e85e010f 100644 --- a/libswscale/utils.c +++ b/libswscale/utils.c @@ -868,9 +868,9 @@ static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange) c->input_rgb2yuv_table[RU_IDX] = (1 << RGB2YUV_SHIFT)*ONE*V/(Z*ub); c->input_rgb2yuv_table[GU_IDX] = -(1 << RGB2YUV_SHIFT)*ONE*ONE/(Z*ub); - c->input_rgb2yuv_table[BU_IDX] = (1 << RGB2YUV_SHIFT)*(ONE + ONE*W/Z)/ub; + c->input_rgb2yuv_table[BU_IDX] = (1 << RGB2YUV_SHIFT)*ONE*(Z+W)/(Z*ub); - c->input_rgb2yuv_table[RV_IDX] = (1 << RGB2YUV_SHIFT)*(ONE + ONE*V/Z)/vr; + c->input_rgb2yuv_table[RV_IDX] = (1 << RGB2YUV_SHIFT)*ONE*(V+Z)/(Z*vr); c->input_rgb2yuv_table[GV_IDX] = -(1 << RGB2YUV_SHIFT)*ONE*ONE/(Z*vr); c->input_rgb2yuv_table[BV_IDX] = (1 << RGB2YUV_SHIFT)*ONE*W/(Z*vr); |