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utvideoenc: optimize and simplify mangle_rgb_planes

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Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-08-22 02:47:32 +02:00
parent 3699960690
commit 4fced11df7
1 changed files with 4 additions and 7 deletions
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11
libavcodec/utvideoenc.c
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@ -196,16 +196,13 @@ static void mangle_rgb_planes(uint8_t *src, int step, int stride, int width,
int height)
{
int i, j;
uint8_t r, g, b;
unsigned g;
for (j = 0; j < height; j++) {
for (i = 0; i < width * step; i += step) {
r = src[i];
g = src[i + 1];
b = src[i + 2];
src[i] = r - g + 0x80;
src[i + 2] = b - g + 0x80;
g = src[i + 1] + 0x80;
src[i] -= g;
src[i + 2] -= g;
}
src += stride;
}