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Merge "add VP8LAddPixels() to lossless.h"

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James Zern 2016-05-10 22:39:28 +00:00 committed by Gerrit Code Review
commit 5ee2136a71
2 changed files with 9 additions and 4 deletions
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4
src/dsp/lossless.c
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@ -28,9 +28,7 @@
// In-place sum of each component with mod 256. // In-place sum of each component with mod 256.
static WEBP_INLINE void AddPixelsEq(uint32_t* a, uint32_t b) { static WEBP_INLINE void AddPixelsEq(uint32_t* a, uint32_t b) {
const uint32_t alpha_and_green = (*a & 0xff00ff00u) + (b & 0xff00ff00u); *a = VP8LAddPixels(*a, b);
const uint32_t red_and_blue = (*a & 0x00ff00ffu) + (b & 0x00ff00ffu);
*a = (alpha_and_green & 0xff00ff00u) | (red_and_blue & 0x00ff00ffu);
} }
static WEBP_INLINE uint32_t Average2(uint32_t a0, uint32_t a1) { static WEBP_INLINE uint32_t Average2(uint32_t a0, uint32_t a1) {

9
src/dsp/lossless.h
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@ -329,7 +329,14 @@ static WEBP_INLINE void VP8LPrefixEncode(int distance, int* const code,
} }
} }
// In-place difference of each component with mod 256. // Sum of each component, mod 256.
static WEBP_INLINE uint32_t VP8LAddPixels(uint32_t a, uint32_t b) {
const uint32_t alpha_and_green = (a & 0xff00ff00u) + (b & 0xff00ff00u);
const uint32_t red_and_blue = (a & 0x00ff00ffu) + (b & 0x00ff00ffu);
return (alpha_and_green & 0xff00ff00u) | (red_and_blue & 0x00ff00ffu);
}
// Difference of each component with mod 256.
static WEBP_INLINE uint32_t VP8LSubPixels(uint32_t a, uint32_t b) { static WEBP_INLINE uint32_t VP8LSubPixels(uint32_t a, uint32_t b) {
const uint32_t alpha_and_green = const uint32_t alpha_and_green =
0x00ff00ffu + (a & 0xff00ff00u) - (b & 0xff00ff00u); 0x00ff00ffu + (a & 0xff00ff00u) - (b & 0xff00ff00u);