diff options
Diffstat (limited to 'src/3rdparty/libwebp/src/dsp/upsampling.c')
-rw-r--r-- | src/3rdparty/libwebp/src/dsp/upsampling.c | 162 |
1 files changed, 12 insertions, 150 deletions
diff --git a/src/3rdparty/libwebp/src/dsp/upsampling.c b/src/3rdparty/libwebp/src/dsp/upsampling.c index 978e3ce..53c68d5 100644 --- a/src/3rdparty/libwebp/src/dsp/upsampling.c +++ b/src/3rdparty/libwebp/src/dsp/upsampling.c @@ -107,57 +107,6 @@ UPSAMPLE_FUNC(UpsampleRgb565LinePair, VP8YuvToRgb565, 2) #endif // FANCY_UPSAMPLING //------------------------------------------------------------------------------ -// simple point-sampling - -#define SAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ -static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ - const uint8_t* u, const uint8_t* v, \ - uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ - int i; \ - for (i = 0; i < len - 1; i += 2) { \ - FUNC(top_y[0], u[0], v[0], top_dst); \ - FUNC(top_y[1], u[0], v[0], top_dst + XSTEP); \ - FUNC(bottom_y[0], u[0], v[0], bottom_dst); \ - FUNC(bottom_y[1], u[0], v[0], bottom_dst + XSTEP); \ - top_y += 2; \ - bottom_y += 2; \ - u++; \ - v++; \ - top_dst += 2 * XSTEP; \ - bottom_dst += 2 * XSTEP; \ - } \ - if (i == len - 1) { /* last one */ \ - FUNC(top_y[0], u[0], v[0], top_dst); \ - FUNC(bottom_y[0], u[0], v[0], bottom_dst); \ - } \ -} - -// All variants implemented. -SAMPLE_FUNC(SampleRgbLinePair, VP8YuvToRgb, 3) -SAMPLE_FUNC(SampleBgrLinePair, VP8YuvToBgr, 3) -SAMPLE_FUNC(SampleRgbaLinePair, VP8YuvToRgba, 4) -SAMPLE_FUNC(SampleBgraLinePair, VP8YuvToBgra, 4) -SAMPLE_FUNC(SampleArgbLinePair, VP8YuvToArgb, 4) -SAMPLE_FUNC(SampleRgba4444LinePair, VP8YuvToRgba4444, 2) -SAMPLE_FUNC(SampleRgb565LinePair, VP8YuvToRgb565, 2) - -#undef SAMPLE_FUNC - -const WebPSampleLinePairFunc WebPSamplers[MODE_LAST] = { - SampleRgbLinePair, // MODE_RGB - SampleRgbaLinePair, // MODE_RGBA - SampleBgrLinePair, // MODE_BGR - SampleBgraLinePair, // MODE_BGRA - SampleArgbLinePair, // MODE_ARGB - SampleRgba4444LinePair, // MODE_RGBA_4444 - SampleRgb565LinePair, // MODE_RGB_565 - SampleRgbaLinePair, // MODE_rgbA - SampleBgraLinePair, // MODE_bgrA - SampleArgbLinePair, // MODE_Argb - SampleRgba4444LinePair // MODE_rgbA_4444 -}; - -//------------------------------------------------------------------------------ #if !defined(FANCY_UPSAMPLING) #define DUAL_SAMPLE_FUNC(FUNC_NAME, FUNC) \ @@ -235,85 +184,17 @@ const WebPYUV444Converter WebPYUV444Converters[MODE_LAST] = { }; //------------------------------------------------------------------------------ -// Premultiplied modes - -// non dithered-modes - -// (x * a * 32897) >> 23 is bit-wise equivalent to (int)(x * a / 255.) -// for all 8bit x or a. For bit-wise equivalence to (int)(x * a / 255. + .5), -// one can use instead: (x * a * 65793 + (1 << 23)) >> 24 -#if 1 // (int)(x * a / 255.) -#define MULTIPLIER(a) ((a) * 32897UL) -#define PREMULTIPLY(x, m) (((x) * (m)) >> 23) -#else // (int)(x * a / 255. + .5) -#define MULTIPLIER(a) ((a) * 65793UL) -#define PREMULTIPLY(x, m) (((x) * (m) + (1UL << 23)) >> 24) -#endif - -static void ApplyAlphaMultiply(uint8_t* rgba, int alpha_first, - int w, int h, int stride) { - while (h-- > 0) { - uint8_t* const rgb = rgba + (alpha_first ? 1 : 0); - const uint8_t* const alpha = rgba + (alpha_first ? 0 : 3); - int i; - for (i = 0; i < w; ++i) { - const uint32_t a = alpha[4 * i]; - if (a != 0xff) { - const uint32_t mult = MULTIPLIER(a); - rgb[4 * i + 0] = PREMULTIPLY(rgb[4 * i + 0], mult); - rgb[4 * i + 1] = PREMULTIPLY(rgb[4 * i + 1], mult); - rgb[4 * i + 2] = PREMULTIPLY(rgb[4 * i + 2], mult); - } - } - rgba += stride; - } -} -#undef MULTIPLIER -#undef PREMULTIPLY - -// rgbA4444 - -#define MULTIPLIER(a) ((a) * 0x1111) // 0x1111 ~= (1 << 16) / 15 - -static WEBP_INLINE uint8_t dither_hi(uint8_t x) { - return (x & 0xf0) | (x >> 4); -} - -static WEBP_INLINE uint8_t dither_lo(uint8_t x) { - return (x & 0x0f) | (x << 4); -} - -static WEBP_INLINE uint8_t multiply(uint8_t x, uint32_t m) { - return (x * m) >> 16; -} +// Main calls -static void ApplyAlphaMultiply4444(uint8_t* rgba4444, - int w, int h, int stride) { - while (h-- > 0) { - int i; - for (i = 0; i < w; ++i) { - const uint8_t a = (rgba4444[2 * i + 1] & 0x0f); - const uint32_t mult = MULTIPLIER(a); - const uint8_t r = multiply(dither_hi(rgba4444[2 * i + 0]), mult); - const uint8_t g = multiply(dither_lo(rgba4444[2 * i + 0]), mult); - const uint8_t b = multiply(dither_hi(rgba4444[2 * i + 1]), mult); - rgba4444[2 * i + 0] = (r & 0xf0) | ((g >> 4) & 0x0f); - rgba4444[2 * i + 1] = (b & 0xf0) | a; - } - rgba4444 += stride; - } -} -#undef MULTIPLIER - -void (*WebPApplyAlphaMultiply)(uint8_t*, int, int, int, int) - = ApplyAlphaMultiply; -void (*WebPApplyAlphaMultiply4444)(uint8_t*, int, int, int) - = ApplyAlphaMultiply4444; +extern void WebPInitUpsamplersSSE2(void); +extern void WebPInitUpsamplersNEON(void); -//------------------------------------------------------------------------------ -// Main call +static volatile VP8CPUInfo upsampling_last_cpuinfo_used2 = + (VP8CPUInfo)&upsampling_last_cpuinfo_used2; void WebPInitUpsamplers(void) { + if (upsampling_last_cpuinfo_used2 == VP8GetCPUInfo) return; + #ifdef FANCY_UPSAMPLING WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair; WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair; @@ -322,45 +203,26 @@ void WebPInitUpsamplers(void) { WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair; WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair; WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair; - - // If defined, use CPUInfo() to overwrite some pointers with faster versions. - if (VP8GetCPUInfo != NULL) { -#if defined(WEBP_USE_SSE2) - if (VP8GetCPUInfo(kSSE2)) { - WebPInitUpsamplersSSE2(); - } -#endif -#if defined(WEBP_USE_NEON) - if (VP8GetCPUInfo(kNEON)) { - WebPInitUpsamplersNEON(); - } -#endif - } -#endif // FANCY_UPSAMPLING -} - -void WebPInitPremultiply(void) { - WebPApplyAlphaMultiply = ApplyAlphaMultiply; - WebPApplyAlphaMultiply4444 = ApplyAlphaMultiply4444; - -#ifdef FANCY_UPSAMPLING WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair; WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair; WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair; WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair; + // If defined, use CPUInfo() to overwrite some pointers with faster versions. if (VP8GetCPUInfo != NULL) { #if defined(WEBP_USE_SSE2) if (VP8GetCPUInfo(kSSE2)) { - WebPInitPremultiplySSE2(); + WebPInitUpsamplersSSE2(); } #endif #if defined(WEBP_USE_NEON) if (VP8GetCPUInfo(kNEON)) { - WebPInitPremultiplyNEON(); + WebPInitUpsamplersNEON(); } #endif } #endif // FANCY_UPSAMPLING + upsampling_last_cpuinfo_used2 = VP8GetCPUInfo; } +//------------------------------------------------------------------------------ |