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MIPS: dspr2: added optimization for EmitAlphaRGB

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New dsp function: WebPDispatchAlpha()

Change-Id: I48e539d22471279ec75185759bc68d18b127f716
This commit is contained in:
Djordje Pesut
2014-08-21 19:26:18 +02:00
committed by skal
parent 953acd56a4
commit 0b21c30b1a
8 changed files with 131 additions and 13 deletions
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23
src/dsp/alpha_processing.c
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@ -284,25 +284,48 @@ static void ApplyAlphaMultiply_16b(uint8_t* rgba4444,
#endif
}
static int DispatchAlpha(const uint8_t* alpha, int alpha_stride,
int width, int height,
uint8_t* dst, int dst_stride) {
uint32_t alpha_mask = 0xff;
int i, j;
for (j = 0; j < height; ++j) {
for (i = 0; i < width; ++i) {
const uint32_t alpha_value = alpha[i];
dst[4 * i] = alpha_value;
alpha_mask &= alpha_value;
}
alpha += alpha_stride;
dst += dst_stride;
}
return (alpha_mask != 0xff);
}
void (*WebPApplyAlphaMultiply)(uint8_t*, int, int, int, int);
void (*WebPApplyAlphaMultiply4444)(uint8_t*, int, int, int);
int (*WebPDispatchAlpha)(const uint8_t*, int, int, int, uint8_t*, int);
//------------------------------------------------------------------------------
// Init function
extern void VP8FiltersInitMIPSdspR2(void);
extern void WebPInitAlphaProcessingMIPSdspR2(void);
void WebPInitAlphaProcessing(void) {
WebPMultARGBRow = MultARGBRow;
WebPMultRow = MultRow;
WebPApplyAlphaMultiply = ApplyAlphaMultiply;
WebPApplyAlphaMultiply4444 = ApplyAlphaMultiply_16b;
WebPDispatchAlpha = DispatchAlpha;
// If defined, use CPUInfo() to overwrite some pointers with faster versions.
if (VP8GetCPUInfo != NULL) {
#if defined(WEBP_USE_MIPS_DSP_R2)
if (VP8GetCPUInfo(kMIPSdspR2)) {
VP8FiltersInitMIPSdspR2();
WebPInitAlphaProcessingMIPSdspR2();
}
#endif
}