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SSE2 for inverse Mult(ARGB)Row and ApplyAlphaMultiply

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Change-Id: Iab5c0e4a4d2b31f86736a9b277e62b6e28c3d2b4
WebPMultRow: ~7x faster
WebPMultARGBRow: ~3x faster
ApplyAlphaMultiply: 60% faster
This commit is contained in:
Pascal Massimino
2014-09-11 07:58:42 +02:00
parent d84a8ffdf7
commit a6bb9b17d8
3 changed files with 147 additions and 5 deletions
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10
src/dsp/alpha_processing.c
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@ -134,7 +134,7 @@ static WEBP_INLINE uint32_t GetScale(uint32_t a, int inverse) {
#endif // USE_TABLES_FOR_ALPHA_MULT
static void MultARGBRow(uint32_t* const ptr, int width, int inverse) {
void WebPMultARGBRowC(uint32_t* const ptr, int width, int inverse) {
int x;
for (x = 0; x < width; ++x) {
const uint32_t argb = ptr[x];
@ -154,8 +154,8 @@ static void MultARGBRow(uint32_t* const ptr, int width, int inverse) {
}
}
static void MultRow(uint8_t* const ptr, const uint8_t* const alpha,
int width, int inverse) {
void WebPMultRowC(uint8_t* const ptr, const uint8_t* const alpha,
int width, int inverse) {
int x;
for (x = 0; x < width; ++x) {
const uint32_t a = alpha[x];
@ -315,8 +315,8 @@ extern void WebPInitAlphaProcessingMIPSdspR2(void);
extern void WebPInitAlphaProcessingSSE2(void);
void WebPInitAlphaProcessing(void) {
WebPMultARGBRow = MultARGBRow;
WebPMultRow = MultRow;
WebPMultARGBRow = WebPMultARGBRowC;
WebPMultRow = WebPMultRowC;
WebPApplyAlphaMultiply = ApplyAlphaMultiply;
WebPApplyAlphaMultiply4444 = ApplyAlphaMultiply_16b;
WebPDispatchAlpha = DispatchAlpha;