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Diffstat (limited to 'media/libwebp/src/dsp/upsampling.c')
| -rw-r--r-- | media/libwebp/src/dsp/upsampling.c | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/media/libwebp/src/dsp/upsampling.c b/media/libwebp/src/dsp/upsampling.c new file mode 100644 index 0000000000..87f771f3eb --- /dev/null +++ b/media/libwebp/src/dsp/upsampling.c @@ -0,0 +1,327 @@ +// Copyright 2011 Google Inc. All Rights Reserved. +// +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING file in the root of the source +// tree. An additional intellectual property rights grant can be found +// in the file PATENTS. All contributing project authors may +// be found in the AUTHORS file in the root of the source tree. +// ----------------------------------------------------------------------------- +// +// YUV to RGB upsampling functions. +// +// Author: somnath@google.com (Somnath Banerjee) + +#include "src/dsp/dsp.h" +#include "src/dsp/yuv.h" + +#include <assert.h> + +//------------------------------------------------------------------------------ +// Fancy upsampler + +#ifdef FANCY_UPSAMPLING + +// Fancy upsampling functions to convert YUV to RGB +WebPUpsampleLinePairFunc WebPUpsamplers[MODE_LAST]; + +// Given samples laid out in a square as: +// [a b] +// [c d] +// we interpolate u/v as: +// ([9*a + 3*b + 3*c + d 3*a + 9*b + 3*c + d] + [8 8]) / 16 +// ([3*a + b + 9*c + 3*d a + 3*b + 3*c + 9*d] [8 8]) / 16 + +// We process u and v together stashed into 32bit (16bit each). +#define LOAD_UV(u, v) ((u) | ((v) << 16)) + +#define UPSAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ +static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ + const uint8_t* top_u, const uint8_t* top_v, \ + const uint8_t* cur_u, const uint8_t* cur_v, \ + uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ + int x; \ + const int last_pixel_pair = (len - 1) >> 1; \ + uint32_t tl_uv = LOAD_UV(top_u[0], top_v[0]); /* top-left sample */ \ + uint32_t l_uv = LOAD_UV(cur_u[0], cur_v[0]); /* left-sample */ \ + assert(top_y != NULL); \ + { \ + const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ + FUNC(top_y[0], uv0 & 0xff, (uv0 >> 16), top_dst); \ + } \ + if (bottom_y != NULL) { \ + const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ + FUNC(bottom_y[0], uv0 & 0xff, (uv0 >> 16), bottom_dst); \ + } \ + for (x = 1; x <= last_pixel_pair; ++x) { \ + const uint32_t t_uv = LOAD_UV(top_u[x], top_v[x]); /* top sample */ \ + const uint32_t uv = LOAD_UV(cur_u[x], cur_v[x]); /* sample */ \ + /* precompute invariant values associated with first and second diagonals*/\ + const uint32_t avg = tl_uv + t_uv + l_uv + uv + 0x00080008u; \ + const uint32_t diag_12 = (avg + 2 * (t_uv + l_uv)) >> 3; \ + const uint32_t diag_03 = (avg + 2 * (tl_uv + uv)) >> 3; \ + { \ + const uint32_t uv0 = (diag_12 + tl_uv) >> 1; \ + const uint32_t uv1 = (diag_03 + t_uv) >> 1; \ + FUNC(top_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ + top_dst + (2 * x - 1) * (XSTEP)); \ + FUNC(top_y[2 * x - 0], uv1 & 0xff, (uv1 >> 16), \ + top_dst + (2 * x - 0) * (XSTEP)); \ + } \ + if (bottom_y != NULL) { \ + const uint32_t uv0 = (diag_03 + l_uv) >> 1; \ + const uint32_t uv1 = (diag_12 + uv) >> 1; \ + FUNC(bottom_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ + bottom_dst + (2 * x - 1) * (XSTEP)); \ + FUNC(bottom_y[2 * x + 0], uv1 & 0xff, (uv1 >> 16), \ + bottom_dst + (2 * x + 0) * (XSTEP)); \ + } \ + tl_uv = t_uv; \ + l_uv = uv; \ + } \ + if (!(len & 1)) { \ + { \ + const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ + FUNC(top_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ + top_dst + (len - 1) * (XSTEP)); \ + } \ + if (bottom_y != NULL) { \ + const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ + FUNC(bottom_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ + bottom_dst + (len - 1) * (XSTEP)); \ + } \ + } \ +} + +// All variants implemented. +#if !WEBP_NEON_OMIT_C_CODE +UPSAMPLE_FUNC(UpsampleRgbaLinePair_C, VP8YuvToRgba, 4) +UPSAMPLE_FUNC(UpsampleBgraLinePair_C, VP8YuvToBgra, 4) +#if !defined(WEBP_REDUCE_CSP) +UPSAMPLE_FUNC(UpsampleArgbLinePair_C, VP8YuvToArgb, 4) +UPSAMPLE_FUNC(UpsampleRgbLinePair_C, VP8YuvToRgb, 3) +UPSAMPLE_FUNC(UpsampleBgrLinePair_C, VP8YuvToBgr, 3) +UPSAMPLE_FUNC(UpsampleRgba4444LinePair_C, VP8YuvToRgba4444, 2) +UPSAMPLE_FUNC(UpsampleRgb565LinePair_C, VP8YuvToRgb565, 2) +#else +static void EmptyUpsampleFunc(const uint8_t* top_y, const uint8_t* bottom_y, + const uint8_t* top_u, const uint8_t* top_v, + const uint8_t* cur_u, const uint8_t* cur_v, + uint8_t* top_dst, uint8_t* bottom_dst, int len) { + (void)top_y; + (void)bottom_y; + (void)top_u; + (void)top_v; + (void)cur_u; + (void)cur_v; + (void)top_dst; + (void)bottom_dst; + (void)len; + assert(0); // COLORSPACE SUPPORT NOT COMPILED +} +#define UpsampleArgbLinePair_C EmptyUpsampleFunc +#define UpsampleRgbLinePair_C EmptyUpsampleFunc +#define UpsampleBgrLinePair_C EmptyUpsampleFunc +#define UpsampleRgba4444LinePair_C EmptyUpsampleFunc +#define UpsampleRgb565LinePair_C EmptyUpsampleFunc +#endif // WEBP_REDUCE_CSP + +#endif + +#undef LOAD_UV +#undef UPSAMPLE_FUNC + +#endif // FANCY_UPSAMPLING + +//------------------------------------------------------------------------------ + +#if !defined(FANCY_UPSAMPLING) +#define DUAL_SAMPLE_FUNC(FUNC_NAME, FUNC) \ +static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bot_y, \ + const uint8_t* top_u, const uint8_t* top_v, \ + const uint8_t* bot_u, const uint8_t* bot_v, \ + uint8_t* top_dst, uint8_t* bot_dst, int len) { \ + const int half_len = len >> 1; \ + int x; \ + assert(top_dst != NULL); \ + { \ + for (x = 0; x < half_len; ++x) { \ + FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x + 0); \ + FUNC(top_y[2 * x + 1], top_u[x], top_v[x], top_dst + 8 * x + 4); \ + } \ + if (len & 1) FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x); \ + } \ + if (bot_dst != NULL) { \ + for (x = 0; x < half_len; ++x) { \ + FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x + 0); \ + FUNC(bot_y[2 * x + 1], bot_u[x], bot_v[x], bot_dst + 8 * x + 4); \ + } \ + if (len & 1) FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x); \ + } \ +} + +DUAL_SAMPLE_FUNC(DualLineSamplerBGRA, VP8YuvToBgra) +DUAL_SAMPLE_FUNC(DualLineSamplerARGB, VP8YuvToArgb) +#undef DUAL_SAMPLE_FUNC + +#endif // !FANCY_UPSAMPLING + +WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last) { + WebPInitUpsamplers(); +#ifdef FANCY_UPSAMPLING + return WebPUpsamplers[alpha_is_last ? MODE_BGRA : MODE_ARGB]; +#else + return (alpha_is_last ? DualLineSamplerBGRA : DualLineSamplerARGB); +#endif +} + +//------------------------------------------------------------------------------ +// YUV444 converter + +#define YUV444_FUNC(FUNC_NAME, FUNC, XSTEP) \ +extern void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ + uint8_t* dst, int len); \ +void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ + uint8_t* dst, int len) { \ + int i; \ + for (i = 0; i < len; ++i) FUNC(y[i], u[i], v[i], &dst[i * (XSTEP)]); \ +} + +YUV444_FUNC(WebPYuv444ToRgba_C, VP8YuvToRgba, 4) +YUV444_FUNC(WebPYuv444ToBgra_C, VP8YuvToBgra, 4) +#if !defined(WEBP_REDUCE_CSP) +YUV444_FUNC(WebPYuv444ToRgb_C, VP8YuvToRgb, 3) +YUV444_FUNC(WebPYuv444ToBgr_C, VP8YuvToBgr, 3) +YUV444_FUNC(WebPYuv444ToArgb_C, VP8YuvToArgb, 4) +YUV444_FUNC(WebPYuv444ToRgba4444_C, VP8YuvToRgba4444, 2) +YUV444_FUNC(WebPYuv444ToRgb565_C, VP8YuvToRgb565, 2) +#else +static void EmptyYuv444Func(const uint8_t* y, + const uint8_t* u, const uint8_t* v, + uint8_t* dst, int len) { + (void)y; + (void)u; + (void)v; + (void)dst; + (void)len; +} +#define WebPYuv444ToRgb_C EmptyYuv444Func +#define WebPYuv444ToBgr_C EmptyYuv444Func +#define WebPYuv444ToArgb_C EmptyYuv444Func +#define WebPYuv444ToRgba4444_C EmptyYuv444Func +#define WebPYuv444ToRgb565_C EmptyYuv444Func +#endif // WEBP_REDUCE_CSP + +#undef YUV444_FUNC + +WebPYUV444Converter WebPYUV444Converters[MODE_LAST]; + +extern void WebPInitYUV444ConvertersMIPSdspR2(void); +extern void WebPInitYUV444ConvertersSSE2(void); +extern void WebPInitYUV444ConvertersSSE41(void); + +WEBP_DSP_INIT_FUNC(WebPInitYUV444Converters) { + WebPYUV444Converters[MODE_RGBA] = WebPYuv444ToRgba_C; + WebPYUV444Converters[MODE_BGRA] = WebPYuv444ToBgra_C; + WebPYUV444Converters[MODE_RGB] = WebPYuv444ToRgb_C; + WebPYUV444Converters[MODE_BGR] = WebPYuv444ToBgr_C; + WebPYUV444Converters[MODE_ARGB] = WebPYuv444ToArgb_C; + WebPYUV444Converters[MODE_RGBA_4444] = WebPYuv444ToRgba4444_C; + WebPYUV444Converters[MODE_RGB_565] = WebPYuv444ToRgb565_C; + WebPYUV444Converters[MODE_rgbA] = WebPYuv444ToRgba_C; + WebPYUV444Converters[MODE_bgrA] = WebPYuv444ToBgra_C; + WebPYUV444Converters[MODE_Argb] = WebPYuv444ToArgb_C; + WebPYUV444Converters[MODE_rgbA_4444] = WebPYuv444ToRgba4444_C; + + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_HAVE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + WebPInitYUV444ConvertersSSE2(); + } +#endif +#if defined(WEBP_HAVE_SSE41) + if (VP8GetCPUInfo(kSSE4_1)) { + WebPInitYUV444ConvertersSSE41(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + WebPInitYUV444ConvertersMIPSdspR2(); + } +#endif + } +} + +//------------------------------------------------------------------------------ +// Main calls + +extern void WebPInitUpsamplersSSE2(void); +extern void WebPInitUpsamplersSSE41(void); +extern void WebPInitUpsamplersNEON(void); +extern void WebPInitUpsamplersMIPSdspR2(void); +extern void WebPInitUpsamplersMSA(void); + +WEBP_DSP_INIT_FUNC(WebPInitUpsamplers) { +#ifdef FANCY_UPSAMPLING +#if !WEBP_NEON_OMIT_C_CODE + WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair_C; + WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePair_C; + WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair_C; + WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair_C; + WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair_C; + WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePair_C; + WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair_C; + WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair_C; + WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair_C; + WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair_C; + WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair_C; +#endif + + // If defined, use CPUInfo() to overwrite some pointers with faster versions. + if (VP8GetCPUInfo != NULL) { +#if defined(WEBP_HAVE_SSE2) + if (VP8GetCPUInfo(kSSE2)) { + WebPInitUpsamplersSSE2(); + } +#endif +#if defined(WEBP_HAVE_SSE41) + if (VP8GetCPUInfo(kSSE4_1)) { + WebPInitUpsamplersSSE41(); + } +#endif +#if defined(WEBP_USE_MIPS_DSP_R2) + if (VP8GetCPUInfo(kMIPSdspR2)) { + WebPInitUpsamplersMIPSdspR2(); + } +#endif +#if defined(WEBP_USE_MSA) + if (VP8GetCPUInfo(kMSA)) { + WebPInitUpsamplersMSA(); + } +#endif + } + +#if defined(WEBP_HAVE_NEON) + if (WEBP_NEON_OMIT_C_CODE || + (VP8GetCPUInfo != NULL && VP8GetCPUInfo(kNEON))) { + WebPInitUpsamplersNEON(); + } +#endif + + assert(WebPUpsamplers[MODE_RGBA] != NULL); + assert(WebPUpsamplers[MODE_BGRA] != NULL); + assert(WebPUpsamplers[MODE_rgbA] != NULL); + assert(WebPUpsamplers[MODE_bgrA] != NULL); +#if !defined(WEBP_REDUCE_CSP) || !WEBP_NEON_OMIT_C_CODE + assert(WebPUpsamplers[MODE_RGB] != NULL); + assert(WebPUpsamplers[MODE_BGR] != NULL); + assert(WebPUpsamplers[MODE_ARGB] != NULL); + assert(WebPUpsamplers[MODE_RGBA_4444] != NULL); + assert(WebPUpsamplers[MODE_RGB_565] != NULL); + assert(WebPUpsamplers[MODE_Argb] != NULL); + assert(WebPUpsamplers[MODE_rgbA_4444] != NULL); +#endif + +#endif // FANCY_UPSAMPLING +} + +//------------------------------------------------------------------------------ |