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~2x faster SSE2 RGB24toY, BGR24toY, ARGBToY|UV

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global effect is ~2% faster encoding from JPG source
and ~8% faster lossless-webp source decoding to PGM (e.g.)

Also revamped the YUVA case to first accumulate R/G/B value into 16b
temporary buffer, and then doing the UV conversion.
-> New function: WebPConvertRGBA32ToUV

Change-Id: I1d7d0c4003aa02966ad33490ce0fcdc7925cf9f5
This commit is contained in:
Pascal Massimino
2015-11-04 08:51:24 +01:00
committed by James Zern
parent 96f5b4237d
commit bfd3fc02df
4 changed files with 409 additions and 69 deletions
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26
src/dsp/yuv.c
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@ -164,7 +164,7 @@ WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplers(void) {
}
//-----------------------------------------------------------------------------
// ARGB -> YUV converters (for lossless decoding)
// ARGB -> YUV converters
static void ConvertARGBToY(const uint32_t* argb, uint8_t* y, int width) {
int i;
@ -175,8 +175,8 @@ static void ConvertARGBToY(const uint32_t* argb, uint8_t* y, int width) {
}
}
static void ConvertARGBToUV(const uint32_t* argb, uint8_t* u, uint8_t* v,
int src_width, int do_store) {
void WebPConvertARGBToUV_C(const uint32_t* argb, uint8_t* u, uint8_t* v,
int src_width, int do_store) {
// No rounding. Last pixel is dealt with separately.
const int uv_width = src_width >> 1;
int i;
@ -232,29 +232,47 @@ static void ConvertBGR24ToY(const uint8_t* bgr, uint8_t* y, int width) {
}
}
void WebPConvertRGBA32ToUV_C(const uint16_t* rgb,
uint8_t* u, uint8_t* v, int width) {
int i;
for (i = 0; i < width; i += 1, rgb += 4) {
const int r = rgb[0], g = rgb[1], b = rgb[2];
u[i] = VP8RGBToU(r, g, b, YUV_HALF << 2);
v[i] = VP8RGBToV(r, g, b, YUV_HALF << 2);
}
}
//-----------------------------------------------------------------------------
void (*WebPConvertRGB24ToY)(const uint8_t* rgb, uint8_t* y, int width);
void (*WebPConvertBGR24ToY)(const uint8_t* bgr, uint8_t* y, int width);
void (*WebPConvertRGBA32ToUV)(const uint16_t* rgb,
uint8_t* u, uint8_t* v, int width);
void (*WebPConvertARGBToY)(const uint32_t* argb, uint8_t* y, int width);
void (*WebPConvertARGBToUV)(const uint32_t* argb, uint8_t* u, uint8_t* v,
int src_width, int do_store);
static volatile VP8CPUInfo rgba_to_yuv_last_cpuinfo_used =
(VP8CPUInfo)&rgba_to_yuv_last_cpuinfo_used;
extern void WebPInitConvertARGBToYUVSSE2(void);
WEBP_TSAN_IGNORE_FUNCTION void WebPInitConvertARGBToYUV(void) {
if (rgba_to_yuv_last_cpuinfo_used == VP8GetCPUInfo) return;
WebPConvertARGBToY = ConvertARGBToY;
WebPConvertARGBToUV = ConvertARGBToUV;
WebPConvertARGBToUV = WebPConvertARGBToUV_C;
WebPConvertRGB24ToY = ConvertRGB24ToY;
WebPConvertBGR24ToY = ConvertBGR24ToY;
WebPConvertRGBA32ToUV = WebPConvertRGBA32ToUV_C;
if (VP8GetCPUInfo != NULL) {
#if defined(WEBP_USE_SSE2)
if (VP8GetCPUInfo(kSSE2)) {
WebPInitConvertARGBToYUVSSE2();
}
#endif // WEBP_USE_SSE2
}