1a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// Copyright 2010 Google Inc. All Rights Reserved. 29aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 30406ce1417f76f2034833414dcecc9f56253640cVikas Arora// Use of this source code is governed by a BSD-style license 40406ce1417f76f2034833414dcecc9f56253640cVikas Arora// that can be found in the COPYING file in the root of the source 50406ce1417f76f2034833414dcecc9f56253640cVikas Arora// tree. An additional intellectual property rights grant can be found 60406ce1417f76f2034833414dcecc9f56253640cVikas Arora// in the file PATENTS. All contributing project authors may 70406ce1417f76f2034833414dcecc9f56253640cVikas Arora// be found in the AUTHORS file in the root of the source tree. 89aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// ----------------------------------------------------------------------------- 99aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 10a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// inline YUV<->RGB conversion function 119aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// 121e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// The exact naming is Y'CbCr, following the ITU-R BT.601 standard. 131e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// More information at: http://en.wikipedia.org/wiki/YCbCr 141e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Y = 0.2569 * R + 0.5044 * G + 0.0979 * B + 16 151e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// U = -0.1483 * R - 0.2911 * G + 0.4394 * B + 128 161e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// V = 0.4394 * R - 0.3679 * G - 0.0715 * B + 128 178b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// We use 16bit fixed point operations for RGB->YUV conversion (YUV_FIX). 181e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 191e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// For the Y'CbCr to RGB conversion, the BT.601 specification reads: 201e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// R = 1.164 * (Y-16) + 1.596 * (V-128) 211e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// G = 1.164 * (Y-16) - 0.813 * (V-128) - 0.391 * (U-128) 221e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// B = 1.164 * (Y-16) + 2.018 * (U-128) 231e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// where Y is in the [16,235] range, and U/V in the [16,240] range. 241e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// 257c8da7ce66017295a65ec028084b90800be377f8James Zern// The fixed-point implementation used here is: 267c8da7ce66017295a65ec028084b90800be377f8James Zern// R = (19077 . y + 26149 . v - 14234) >> 6 277c8da7ce66017295a65ec028084b90800be377f8James Zern// G = (19077 . y - 6419 . u - 13320 . v + 8708) >> 6 287c8da7ce66017295a65ec028084b90800be377f8James Zern// B = (19077 . y + 33050 . u - 17685) >> 6 297c8da7ce66017295a65ec028084b90800be377f8James Zern// where the '.' operator is the mulhi_epu16 variant: 307c8da7ce66017295a65ec028084b90800be377f8James Zern// a . b = ((a << 8) * b) >> 16 317c8da7ce66017295a65ec028084b90800be377f8James Zern// that preserves 8 bits of fractional precision before final descaling. 327c8da7ce66017295a65ec028084b90800be377f8James Zern 339aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Author: Skal (pascal.massimino@gmail.com) 349aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 35a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora#ifndef WEBP_DSP_YUV_H_ 36a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora#define WEBP_DSP_YUV_H_ 379aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 388b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#include "./dsp.h" 39fa39824bb690c5806358871f46940d0450973d8aJames Zern#include "../dec/vp8_dec.h" 409aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 411e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#if defined(WEBP_EXPERIMENTAL_FEATURES) 421e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// Do NOT activate this feature for real compression. This is only experimental! 431e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// This flag is for comparison purpose against JPEG's "YUVj" natural colorspace. 441e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// This colorspace is close to Rec.601's Y'CbCr model with the notable 451e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// difference of allowing larger range for luma/chroma. 461e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// See http://en.wikipedia.org/wiki/YCbCr#JPEG_conversion paragraph, and its 471e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// difference with http://en.wikipedia.org/wiki/YCbCr#ITU-R_BT.601_conversion 481e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// #define USE_YUVj 491e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#endif 5088fe2b83c4b9232cd08729556fd0485d6a6a92cdVikas Arora 51a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 52a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// YUV -> RGB conversion 53a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 548b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#ifdef __cplusplus 559aea642eefa7a641ab8b89d953251939221d2719Eric Hassoldextern "C" { 569aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#endif 579aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 588b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroraenum { 598b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora YUV_FIX = 16, // fixed-point precision for RGB->YUV 608b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora YUV_HALF = 1 << (YUV_FIX - 1), 618b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora YUV_MASK = (256 << YUV_FIX) - 1, 628b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora YUV_RANGE_MIN = -227, // min value of r/g/b output 638b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora YUV_RANGE_MAX = 256 + 226, // max value of r/g/b output 648b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 657c8da7ce66017295a65ec028084b90800be377f8James Zern YUV_FIX2 = 6, // fixed-point precision for YUV->RGB 667c8da7ce66017295a65ec028084b90800be377f8James Zern YUV_HALF2 = 1 << YUV_FIX2 >> 1, 678b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora YUV_MASK2 = (256 << YUV_FIX2) - 1 689aea642eefa7a641ab8b89d953251939221d2719Eric Hassold}; 690406ce1417f76f2034833414dcecc9f56253640cVikas Arora 708b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora//------------------------------------------------------------------------------ 717c8da7ce66017295a65ec028084b90800be377f8James Zern// slower on x86 by ~7-8%, but bit-exact with the SSE2/NEON version 728b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 737c8da7ce66017295a65ec028084b90800be377f8James Zernstatic WEBP_INLINE int MultHi(int v, int coeff) { // _mm_mulhi_epu16 emulation 747c8da7ce66017295a65ec028084b90800be377f8James Zern return (v * coeff) >> 8; 757c8da7ce66017295a65ec028084b90800be377f8James Zern} 768b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 778b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE int VP8Clip8(int v) { 788b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora return ((v & ~YUV_MASK2) == 0) ? (v >> YUV_FIX2) : (v < 0) ? 0 : 255; 798b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora} 808b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 818b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE int VP8YUVToR(int y, int v) { 827c8da7ce66017295a65ec028084b90800be377f8James Zern return VP8Clip8(MultHi(y, 19077) + MultHi(v, 26149) - 14234); 838b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora} 848b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 858b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE int VP8YUVToG(int y, int u, int v) { 867c8da7ce66017295a65ec028084b90800be377f8James Zern return VP8Clip8(MultHi(y, 19077) - MultHi(u, 6419) - MultHi(v, 13320) + 8708); 878b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora} 888b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 898b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE int VP8YUVToB(int y, int u) { 907c8da7ce66017295a65ec028084b90800be377f8James Zern return VP8Clip8(MultHi(y, 19077) + MultHi(u, 33050) - 17685); 918b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora} 929aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 938b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE void VP8YuvToRgb(int y, int u, int v, 94a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora uint8_t* const rgb) { 958b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora rgb[0] = VP8YUVToR(y, v); 968b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora rgb[1] = VP8YUVToG(y, u, v); 978b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora rgb[2] = VP8YUVToB(y, u); 989aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} 999aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1008b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE void VP8YuvToBgr(int y, int u, int v, 1010406ce1417f76f2034833414dcecc9f56253640cVikas Arora uint8_t* const bgr) { 1028b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora bgr[0] = VP8YUVToB(y, u); 1038b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora bgr[1] = VP8YUVToG(y, u, v); 1048b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora bgr[2] = VP8YUVToR(y, v); 1050406ce1417f76f2034833414dcecc9f56253640cVikas Arora} 1060406ce1417f76f2034833414dcecc9f56253640cVikas Arora 1078b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE void VP8YuvToRgb565(int y, int u, int v, 108a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora uint8_t* const rgb) { 1098b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const int r = VP8YUVToR(y, v); // 5 usable bits 1108b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const int g = VP8YUVToG(y, u, v); // 6 usable bits 1118b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const int b = VP8YUVToB(y, u); // 5 usable bits 1128b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const int rg = (r & 0xf8) | (g >> 5); 1138b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const int gb = ((g << 3) & 0xe0) | (b >> 3); 1141e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#ifdef WEBP_SWAP_16BIT_CSP 1151e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora rgb[0] = gb; 1161e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora rgb[1] = rg; 11788fe2b83c4b9232cd08729556fd0485d6a6a92cdVikas Arora#else 1181e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora rgb[0] = rg; 1191e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora rgb[1] = gb; 12088fe2b83c4b9232cd08729556fd0485d6a6a92cdVikas Arora#endif 121466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora} 122466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora 1238b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE void VP8YuvToRgba4444(int y, int u, int v, 124466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora uint8_t* const argb) { 1258b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const int r = VP8YUVToR(y, v); // 4 usable bits 1268b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const int g = VP8YUVToG(y, u, v); // 4 usable bits 1278b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const int b = VP8YUVToB(y, u); // 4 usable bits 1288b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const int rg = (r & 0xf0) | (g >> 4); 1298b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora const int ba = (b & 0xf0) | 0x0f; // overwrite the lower 4 bits 1301e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#ifdef WEBP_SWAP_16BIT_CSP 1311e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora argb[0] = ba; 1321e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora argb[1] = rg; 13388fe2b83c4b9232cd08729556fd0485d6a6a92cdVikas Arora#else 1341e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora argb[0] = rg; 1351e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora argb[1] = ba; 13688fe2b83c4b9232cd08729556fd0485d6a6a92cdVikas Arora#endif 1379aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} 1389aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1398b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora//----------------------------------------------------------------------------- 1408b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Alpha handling variants 1418b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 1420406ce1417f76f2034833414dcecc9f56253640cVikas Arorastatic WEBP_INLINE void VP8YuvToArgb(uint8_t y, uint8_t u, uint8_t v, 1430406ce1417f76f2034833414dcecc9f56253640cVikas Arora uint8_t* const argb) { 1440406ce1417f76f2034833414dcecc9f56253640cVikas Arora argb[0] = 0xff; 1450406ce1417f76f2034833414dcecc9f56253640cVikas Arora VP8YuvToRgb(y, u, v, argb + 1); 1469aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} 1479aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 148a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arorastatic WEBP_INLINE void VP8YuvToBgra(uint8_t y, uint8_t u, uint8_t v, 149a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora uint8_t* const bgra) { 1509aea642eefa7a641ab8b89d953251939221d2719Eric Hassold VP8YuvToBgr(y, u, v, bgra); 1519aea642eefa7a641ab8b89d953251939221d2719Eric Hassold bgra[3] = 0xff; 1529aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} 1539aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 154a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arorastatic WEBP_INLINE void VP8YuvToRgba(uint8_t y, uint8_t u, uint8_t v, 155a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora uint8_t* const rgba) { 156466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora VP8YuvToRgb(y, u, v, rgba); 157466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora rgba[3] = 0xff; 158466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora} 159466727975bcc57c0c5597bcd0747a2fe4777b303Vikas Arora 1609aea642eefa7a641ab8b89d953251939221d2719Eric Hassold// Must be called before everything, to initialize the tables. 16103d5e34c70f174c16282b0efdc6bb9473df5f8f1Vikas Aroravoid VP8YUVInit(void); 1629aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 1638b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora//----------------------------------------------------------------------------- 1648b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// SSE2 extra functions (mostly for upsampling_sse2.c) 1658b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 1668b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#if defined(WEBP_USE_SSE2) 1678b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 1687c8da7ce66017295a65ec028084b90800be377f8James Zern// Process 32 pixels and store the result (16b, 24b or 32b per pixel) in *dst. 1698b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroravoid VP8YuvToRgba32(const uint8_t* y, const uint8_t* u, const uint8_t* v, 1708b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t* dst); 1718b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroravoid VP8YuvToRgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v, 1728b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t* dst); 1738b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroravoid VP8YuvToBgra32(const uint8_t* y, const uint8_t* u, const uint8_t* v, 1748b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t* dst); 1758b720228d581a84fd173b6dcb2fa295b59db489aVikas Aroravoid VP8YuvToBgr32(const uint8_t* y, const uint8_t* u, const uint8_t* v, 1768b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uint8_t* dst); 1777c8da7ce66017295a65ec028084b90800be377f8James Zernvoid VP8YuvToArgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v, 1787c8da7ce66017295a65ec028084b90800be377f8James Zern uint8_t* dst); 1797c8da7ce66017295a65ec028084b90800be377f8James Zernvoid VP8YuvToRgba444432(const uint8_t* y, const uint8_t* u, const uint8_t* v, 1807c8da7ce66017295a65ec028084b90800be377f8James Zern uint8_t* dst); 1817c8da7ce66017295a65ec028084b90800be377f8James Zernvoid VP8YuvToRgb56532(const uint8_t* y, const uint8_t* u, const uint8_t* v, 1827c8da7ce66017295a65ec028084b90800be377f8James Zern uint8_t* dst); 1838b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 1848b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#endif // WEBP_USE_SSE2 1858b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora 186a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora//------------------------------------------------------------------------------ 187a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora// RGB -> YUV conversion 188a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 1898b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// Stub functions that can be called with various rounding values: 1908b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE int VP8ClipUV(int uv, int rounding) { 1918b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora uv = (uv + rounding + (128 << (YUV_FIX + 2))) >> (YUV_FIX + 2); 1928b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora return ((uv & ~0xff) == 0) ? uv : (uv < 0) ? 0 : 255; 193a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora} 194a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 1951e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#ifndef USE_YUVj 1961e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 1978b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE int VP8RGBToY(int r, int g, int b, int rounding) { 198a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora const int luma = 16839 * r + 33059 * g + 6420 * b; 1998b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora return (luma + rounding + (16 << YUV_FIX)) >> YUV_FIX; // no need to clip 200a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora} 201a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 2028b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE int VP8RGBToU(int r, int g, int b, int rounding) { 2031e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora const int u = -9719 * r - 19081 * g + 28800 * b; 2048b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora return VP8ClipUV(u, rounding); 2051e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora} 2061e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 2078b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE int VP8RGBToV(int r, int g, int b, int rounding) { 2081e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora const int v = +28800 * r - 24116 * g - 4684 * b; 2098b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora return VP8ClipUV(v, rounding); 2101e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora} 2111e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 2121e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#else 2131e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 2141e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// This JPEG-YUV colorspace, only for comparison! 2158b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora// These are also 16bit precision coefficients from Rec.601, but with full 2161e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora// [0..255] output range. 2178b720228d581a84fd173b6dcb2fa295b59db489aVikas Arorastatic WEBP_INLINE int VP8RGBToY(int r, int g, int b, int rounding) { 2181e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora const int luma = 19595 * r + 38470 * g + 7471 * b; 2198b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora return (luma + rounding) >> YUV_FIX; // no need to clip 2201e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora} 2211e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 22233f74dabbc7920a65ed435d7417987589febdc16Vikas Arorastatic WEBP_INLINE int VP8RGBToU(int r, int g, int b, int rounding) { 2231e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora const int u = -11058 * r - 21710 * g + 32768 * b; 2248b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora return VP8ClipUV(u, rounding); 225a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora} 226a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 22733f74dabbc7920a65ed435d7417987589febdc16Vikas Arorastatic WEBP_INLINE int VP8RGBToV(int r, int g, int b, int rounding) { 2281e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora const int v = 32768 * r - 27439 * g - 5329 * b; 2298b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora return VP8ClipUV(v, rounding); 230a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora} 231a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora 2321e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora#endif // USE_YUVj 2331e7bf8805bd030c19924a5306837ecd72c295751Vikas Arora 2348b720228d581a84fd173b6dcb2fa295b59db489aVikas Arora#ifdef __cplusplus 2359aea642eefa7a641ab8b89d953251939221d2719Eric Hassold} // extern "C" 2369aea642eefa7a641ab8b89d953251939221d2719Eric Hassold#endif 2379aea642eefa7a641ab8b89d953251939221d2719Eric Hassold 238a2415724fb3466168b2af5b08bd94ba732c0e753Vikas Arora#endif /* WEBP_DSP_YUV_H_ */ 239