1// Copyright 2011 Google Inc. All Rights Reserved. 2// 3// Use of this source code is governed by a BSD-style license 4// that can be found in the COPYING file in the root of the source 5// tree. An additional intellectual property rights grant can be found 6// in the file PATENTS. All contributing project authors may 7// be found in the AUTHORS file in the root of the source tree. 8// ----------------------------------------------------------------------------- 9// 10// YUV to RGB upsampling functions. 11// 12// Author: somnath@google.com (Somnath Banerjee) 13 14#include "src/dsp/dsp.h" 15#include "src/dsp/yuv.h" 16 17#include <assert.h> 18 19//------------------------------------------------------------------------------ 20// Fancy upsampler 21 22#ifdef FANCY_UPSAMPLING 23 24// Fancy upsampling functions to convert YUV to RGB 25WebPUpsampleLinePairFunc WebPUpsamplers[MODE_LAST]; 26 27// Given samples laid out in a square as: 28// [a b] 29// [c d] 30// we interpolate u/v as: 31// ([9*a + 3*b + 3*c + d 3*a + 9*b + 3*c + d] + [8 8]) / 16 32// ([3*a + b + 9*c + 3*d a + 3*b + 3*c + 9*d] [8 8]) / 16 33 34// We process u and v together stashed into 32bit (16bit each). 35#define LOAD_UV(u, v) ((u) | ((v) << 16)) 36 37#define UPSAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \ 38static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \ 39 const uint8_t* top_u, const uint8_t* top_v, \ 40 const uint8_t* cur_u, const uint8_t* cur_v, \ 41 uint8_t* top_dst, uint8_t* bottom_dst, int len) { \ 42 int x; \ 43 const int last_pixel_pair = (len - 1) >> 1; \ 44 uint32_t tl_uv = LOAD_UV(top_u[0], top_v[0]); /* top-left sample */ \ 45 uint32_t l_uv = LOAD_UV(cur_u[0], cur_v[0]); /* left-sample */ \ 46 assert(top_y != NULL); \ 47 { \ 48 const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ 49 FUNC(top_y[0], uv0 & 0xff, (uv0 >> 16), top_dst); \ 50 } \ 51 if (bottom_y != NULL) { \ 52 const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ 53 FUNC(bottom_y[0], uv0 & 0xff, (uv0 >> 16), bottom_dst); \ 54 } \ 55 for (x = 1; x <= last_pixel_pair; ++x) { \ 56 const uint32_t t_uv = LOAD_UV(top_u[x], top_v[x]); /* top sample */ \ 57 const uint32_t uv = LOAD_UV(cur_u[x], cur_v[x]); /* sample */ \ 58 /* precompute invariant values associated with first and second diagonals*/\ 59 const uint32_t avg = tl_uv + t_uv + l_uv + uv + 0x00080008u; \ 60 const uint32_t diag_12 = (avg + 2 * (t_uv + l_uv)) >> 3; \ 61 const uint32_t diag_03 = (avg + 2 * (tl_uv + uv)) >> 3; \ 62 { \ 63 const uint32_t uv0 = (diag_12 + tl_uv) >> 1; \ 64 const uint32_t uv1 = (diag_03 + t_uv) >> 1; \ 65 FUNC(top_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ 66 top_dst + (2 * x - 1) * (XSTEP)); \ 67 FUNC(top_y[2 * x - 0], uv1 & 0xff, (uv1 >> 16), \ 68 top_dst + (2 * x - 0) * (XSTEP)); \ 69 } \ 70 if (bottom_y != NULL) { \ 71 const uint32_t uv0 = (diag_03 + l_uv) >> 1; \ 72 const uint32_t uv1 = (diag_12 + uv) >> 1; \ 73 FUNC(bottom_y[2 * x - 1], uv0 & 0xff, (uv0 >> 16), \ 74 bottom_dst + (2 * x - 1) * (XSTEP)); \ 75 FUNC(bottom_y[2 * x + 0], uv1 & 0xff, (uv1 >> 16), \ 76 bottom_dst + (2 * x + 0) * (XSTEP)); \ 77 } \ 78 tl_uv = t_uv; \ 79 l_uv = uv; \ 80 } \ 81 if (!(len & 1)) { \ 82 { \ 83 const uint32_t uv0 = (3 * tl_uv + l_uv + 0x00020002u) >> 2; \ 84 FUNC(top_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ 85 top_dst + (len - 1) * (XSTEP)); \ 86 } \ 87 if (bottom_y != NULL) { \ 88 const uint32_t uv0 = (3 * l_uv + tl_uv + 0x00020002u) >> 2; \ 89 FUNC(bottom_y[len - 1], uv0 & 0xff, (uv0 >> 16), \ 90 bottom_dst + (len - 1) * (XSTEP)); \ 91 } \ 92 } \ 93} 94 95// All variants implemented. 96#if !WEBP_NEON_OMIT_C_CODE 97UPSAMPLE_FUNC(UpsampleRgbaLinePair_C, VP8YuvToRgba, 4) 98UPSAMPLE_FUNC(UpsampleBgraLinePair_C, VP8YuvToBgra, 4) 99#if !defined(WEBP_REDUCE_CSP) 100UPSAMPLE_FUNC(UpsampleArgbLinePair_C, VP8YuvToArgb, 4) 101UPSAMPLE_FUNC(UpsampleRgbLinePair_C, VP8YuvToRgb, 3) 102UPSAMPLE_FUNC(UpsampleBgrLinePair_C, VP8YuvToBgr, 3) 103UPSAMPLE_FUNC(UpsampleRgba4444LinePair_C, VP8YuvToRgba4444, 2) 104UPSAMPLE_FUNC(UpsampleRgb565LinePair_C, VP8YuvToRgb565, 2) 105#else 106static void EmptyUpsampleFunc(const uint8_t* top_y, const uint8_t* bottom_y, 107 const uint8_t* top_u, const uint8_t* top_v, 108 const uint8_t* cur_u, const uint8_t* cur_v, 109 uint8_t* top_dst, uint8_t* bottom_dst, int len) { 110 (void)top_y; 111 (void)bottom_y; 112 (void)top_u; 113 (void)top_v; 114 (void)cur_u; 115 (void)cur_v; 116 (void)top_dst; 117 (void)bottom_dst; 118 (void)len; 119 assert(0); // COLORSPACE SUPPORT NOT COMPILED 120} 121#define UpsampleArgbLinePair_C EmptyUpsampleFunc 122#define UpsampleRgbLinePair_C EmptyUpsampleFunc 123#define UpsampleBgrLinePair_C EmptyUpsampleFunc 124#define UpsampleRgba4444LinePair_C EmptyUpsampleFunc 125#define UpsampleRgb565LinePair_C EmptyUpsampleFunc 126#endif // WEBP_REDUCE_CSP 127 128#endif 129 130#undef LOAD_UV 131#undef UPSAMPLE_FUNC 132 133#endif // FANCY_UPSAMPLING 134 135//------------------------------------------------------------------------------ 136 137#if !defined(FANCY_UPSAMPLING) 138#define DUAL_SAMPLE_FUNC(FUNC_NAME, FUNC) \ 139static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bot_y, \ 140 const uint8_t* top_u, const uint8_t* top_v, \ 141 const uint8_t* bot_u, const uint8_t* bot_v, \ 142 uint8_t* top_dst, uint8_t* bot_dst, int len) { \ 143 const int half_len = len >> 1; \ 144 int x; \ 145 assert(top_dst != NULL); \ 146 { \ 147 for (x = 0; x < half_len; ++x) { \ 148 FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x + 0); \ 149 FUNC(top_y[2 * x + 1], top_u[x], top_v[x], top_dst + 8 * x + 4); \ 150 } \ 151 if (len & 1) FUNC(top_y[2 * x + 0], top_u[x], top_v[x], top_dst + 8 * x); \ 152 } \ 153 if (bot_dst != NULL) { \ 154 for (x = 0; x < half_len; ++x) { \ 155 FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x + 0); \ 156 FUNC(bot_y[2 * x + 1], bot_u[x], bot_v[x], bot_dst + 8 * x + 4); \ 157 } \ 158 if (len & 1) FUNC(bot_y[2 * x + 0], bot_u[x], bot_v[x], bot_dst + 8 * x); \ 159 } \ 160} 161 162DUAL_SAMPLE_FUNC(DualLineSamplerBGRA, VP8YuvToBgra) 163DUAL_SAMPLE_FUNC(DualLineSamplerARGB, VP8YuvToArgb) 164#undef DUAL_SAMPLE_FUNC 165 166#endif // !FANCY_UPSAMPLING 167 168WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last) { 169 WebPInitUpsamplers(); 170#ifdef FANCY_UPSAMPLING 171 return WebPUpsamplers[alpha_is_last ? MODE_BGRA : MODE_ARGB]; 172#else 173 return (alpha_is_last ? DualLineSamplerBGRA : DualLineSamplerARGB); 174#endif 175} 176 177//------------------------------------------------------------------------------ 178// YUV444 converter 179 180#define YUV444_FUNC(FUNC_NAME, FUNC, XSTEP) \ 181extern void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ 182 uint8_t* dst, int len); \ 183void FUNC_NAME(const uint8_t* y, const uint8_t* u, const uint8_t* v, \ 184 uint8_t* dst, int len) { \ 185 int i; \ 186 for (i = 0; i < len; ++i) FUNC(y[i], u[i], v[i], &dst[i * (XSTEP)]); \ 187} 188 189YUV444_FUNC(WebPYuv444ToRgba_C, VP8YuvToRgba, 4) 190YUV444_FUNC(WebPYuv444ToBgra_C, VP8YuvToBgra, 4) 191#if !defined(WEBP_REDUCE_CSP) 192YUV444_FUNC(WebPYuv444ToRgb_C, VP8YuvToRgb, 3) 193YUV444_FUNC(WebPYuv444ToBgr_C, VP8YuvToBgr, 3) 194YUV444_FUNC(WebPYuv444ToArgb_C, VP8YuvToArgb, 4) 195YUV444_FUNC(WebPYuv444ToRgba4444_C, VP8YuvToRgba4444, 2) 196YUV444_FUNC(WebPYuv444ToRgb565_C, VP8YuvToRgb565, 2) 197#else 198static void EmptyYuv444Func(const uint8_t* y, 199 const uint8_t* u, const uint8_t* v, 200 uint8_t* dst, int len) { 201 (void)y; 202 (void)u; 203 (void)v; 204 (void)dst; 205 (void)len; 206} 207#define WebPYuv444ToRgb_C EmptyYuv444Func 208#define WebPYuv444ToBgr_C EmptyYuv444Func 209#define WebPYuv444ToArgb_C EmptyYuv444Func 210#define WebPYuv444ToRgba4444_C EmptyYuv444Func 211#define WebPYuv444ToRgb565_C EmptyYuv444Func 212#endif // WEBP_REDUCE_CSP 213 214#undef YUV444_FUNC 215 216WebPYUV444Converter WebPYUV444Converters[MODE_LAST]; 217 218extern void WebPInitYUV444ConvertersMIPSdspR2(void); 219extern void WebPInitYUV444ConvertersSSE2(void); 220 221static volatile VP8CPUInfo upsampling_last_cpuinfo_used1 = 222 (VP8CPUInfo)&upsampling_last_cpuinfo_used1; 223 224WEBP_TSAN_IGNORE_FUNCTION void WebPInitYUV444Converters(void) { 225 if (upsampling_last_cpuinfo_used1 == VP8GetCPUInfo) return; 226 227 WebPYUV444Converters[MODE_RGBA] = WebPYuv444ToRgba_C; 228 WebPYUV444Converters[MODE_BGRA] = WebPYuv444ToBgra_C; 229 WebPYUV444Converters[MODE_RGB] = WebPYuv444ToRgb_C; 230 WebPYUV444Converters[MODE_BGR] = WebPYuv444ToBgr_C; 231 WebPYUV444Converters[MODE_ARGB] = WebPYuv444ToArgb_C; 232 WebPYUV444Converters[MODE_RGBA_4444] = WebPYuv444ToRgba4444_C; 233 WebPYUV444Converters[MODE_RGB_565] = WebPYuv444ToRgb565_C; 234 WebPYUV444Converters[MODE_rgbA] = WebPYuv444ToRgba_C; 235 WebPYUV444Converters[MODE_bgrA] = WebPYuv444ToBgra_C; 236 WebPYUV444Converters[MODE_Argb] = WebPYuv444ToArgb_C; 237 WebPYUV444Converters[MODE_rgbA_4444] = WebPYuv444ToRgba4444_C; 238 239 if (VP8GetCPUInfo != NULL) { 240#if defined(WEBP_USE_SSE2) 241 if (VP8GetCPUInfo(kSSE2)) { 242 WebPInitYUV444ConvertersSSE2(); 243 } 244#endif 245#if defined(WEBP_USE_MIPS_DSP_R2) 246 if (VP8GetCPUInfo(kMIPSdspR2)) { 247 WebPInitYUV444ConvertersMIPSdspR2(); 248 } 249#endif 250 } 251 upsampling_last_cpuinfo_used1 = VP8GetCPUInfo; 252} 253 254//------------------------------------------------------------------------------ 255// Main calls 256 257extern void WebPInitUpsamplersSSE2(void); 258extern void WebPInitUpsamplersNEON(void); 259extern void WebPInitUpsamplersMIPSdspR2(void); 260extern void WebPInitUpsamplersMSA(void); 261 262static volatile VP8CPUInfo upsampling_last_cpuinfo_used2 = 263 (VP8CPUInfo)&upsampling_last_cpuinfo_used2; 264 265WEBP_TSAN_IGNORE_FUNCTION void WebPInitUpsamplers(void) { 266 if (upsampling_last_cpuinfo_used2 == VP8GetCPUInfo) return; 267 268#ifdef FANCY_UPSAMPLING 269#if !WEBP_NEON_OMIT_C_CODE 270 WebPUpsamplers[MODE_RGBA] = UpsampleRgbaLinePair_C; 271 WebPUpsamplers[MODE_BGRA] = UpsampleBgraLinePair_C; 272 WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair_C; 273 WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair_C; 274 WebPUpsamplers[MODE_RGB] = UpsampleRgbLinePair_C; 275 WebPUpsamplers[MODE_BGR] = UpsampleBgrLinePair_C; 276 WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair_C; 277 WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair_C; 278 WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair_C; 279 WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair_C; 280 WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair_C; 281#endif 282 283 // If defined, use CPUInfo() to overwrite some pointers with faster versions. 284 if (VP8GetCPUInfo != NULL) { 285#if defined(WEBP_USE_SSE2) 286 if (VP8GetCPUInfo(kSSE2)) { 287 WebPInitUpsamplersSSE2(); 288 } 289#endif 290#if defined(WEBP_USE_MIPS_DSP_R2) 291 if (VP8GetCPUInfo(kMIPSdspR2)) { 292 WebPInitUpsamplersMIPSdspR2(); 293 } 294#endif 295#if defined(WEBP_USE_MSA) 296 if (VP8GetCPUInfo(kMSA)) { 297 WebPInitUpsamplersMSA(); 298 } 299#endif 300 } 301 302#if defined(WEBP_USE_NEON) 303 if (WEBP_NEON_OMIT_C_CODE || 304 (VP8GetCPUInfo != NULL && VP8GetCPUInfo(kNEON))) { 305 WebPInitUpsamplersNEON(); 306 } 307#endif 308 309 assert(WebPUpsamplers[MODE_RGBA] != NULL); 310 assert(WebPUpsamplers[MODE_BGRA] != NULL); 311 assert(WebPUpsamplers[MODE_rgbA] != NULL); 312 assert(WebPUpsamplers[MODE_bgrA] != NULL); 313 assert(WebPUpsamplers[MODE_RGB] != NULL); 314 assert(WebPUpsamplers[MODE_BGR] != NULL); 315 assert(WebPUpsamplers[MODE_ARGB] != NULL); 316 assert(WebPUpsamplers[MODE_RGBA_4444] != NULL); 317 assert(WebPUpsamplers[MODE_RGB_565] != NULL); 318 assert(WebPUpsamplers[MODE_Argb] != NULL); 319 assert(WebPUpsamplers[MODE_rgbA_4444] != NULL); 320 321#endif // FANCY_UPSAMPLING 322 upsampling_last_cpuinfo_used2 = VP8GetCPUInfo; 323} 324 325//------------------------------------------------------------------------------ 326