1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "media/base/simd/convert_yuv_to_rgb.h" 6 #include "media/base/simd/yuv_to_rgb_table.h" 7 8 namespace media { 9 10 #define packuswb(x) ((x) < 0 ? 0 : ((x) > 255 ? 255 : (x))) 11 #define paddsw(x, y) (((x) + (y)) < -32768 ? -32768 : \ 12 (((x) + (y)) > 32767 ? 32767 : ((x) + (y)))) 13 14 // On Android, pixel layout is RGBA (see skia/include/core/SkColorPriv.h); 15 // however, other Chrome platforms use BGRA (see skia/config/SkUserConfig.h). 16 // Ideally, android should not use the functions here due to performance issue 17 // (http://crbug.com/249980). 18 #if defined(OS_ANDROID) 19 #define SK_R32_SHIFT 0 20 #define SK_G32_SHIFT 8 21 #define SK_B32_SHIFT 16 22 #define SK_A32_SHIFT 24 23 #define R_INDEX 0 24 #define G_INDEX 1 25 #define B_INDEX 2 26 #define A_INDEX 3 27 #else 28 #define SK_B32_SHIFT 0 29 #define SK_G32_SHIFT 8 30 #define SK_R32_SHIFT 16 31 #define SK_A32_SHIFT 24 32 #define B_INDEX 0 33 #define G_INDEX 1 34 #define R_INDEX 2 35 #define A_INDEX 3 36 #endif 37 38 static inline void ConvertYUVToRGB32_C(uint8 y, 39 uint8 u, 40 uint8 v, 41 uint8* rgb_buf, 42 const int16 convert_table[1024][4]) { 43 int b = convert_table[256+u][B_INDEX]; 44 int g = convert_table[256+u][G_INDEX]; 45 int r = convert_table[256+u][R_INDEX]; 46 int a = convert_table[256+u][A_INDEX]; 47 48 b = paddsw(b, convert_table[512+v][B_INDEX]); 49 g = paddsw(g, convert_table[512+v][G_INDEX]); 50 r = paddsw(r, convert_table[512+v][R_INDEX]); 51 a = paddsw(a, convert_table[512+v][A_INDEX]); 52 53 b = paddsw(b, convert_table[y][B_INDEX]); 54 g = paddsw(g, convert_table[y][G_INDEX]); 55 r = paddsw(r, convert_table[y][R_INDEX]); 56 a = paddsw(a, convert_table[y][A_INDEX]); 57 58 b >>= 6; 59 g >>= 6; 60 r >>= 6; 61 a >>= 6; 62 63 *reinterpret_cast<uint32*>(rgb_buf) = (packuswb(b) << SK_B32_SHIFT) | 64 (packuswb(g) << SK_G32_SHIFT) | 65 (packuswb(r) << SK_R32_SHIFT) | 66 (packuswb(a) << SK_A32_SHIFT); 67 } 68 69 static inline void ConvertYUVAToARGB_C(uint8 y, 70 uint8 u, 71 uint8 v, 72 uint8 a, 73 uint8* rgb_buf, 74 const int16 convert_table[1024][4]) { 75 int b = convert_table[256+u][0]; 76 int g = convert_table[256+u][1]; 77 int r = convert_table[256+u][2]; 78 79 b = paddsw(b, convert_table[512+v][0]); 80 g = paddsw(g, convert_table[512+v][1]); 81 r = paddsw(r, convert_table[512+v][2]); 82 83 b = paddsw(b, convert_table[y][0]); 84 g = paddsw(g, convert_table[y][1]); 85 r = paddsw(r, convert_table[y][2]); 86 87 b >>= 6; 88 g >>= 6; 89 r >>= 6; 90 91 b = packuswb(b) * a >> 8; 92 g = packuswb(g) * a >> 8; 93 r = packuswb(r) * a >> 8; 94 95 *reinterpret_cast<uint32*>(rgb_buf) = (b << SK_B32_SHIFT) | 96 (g << SK_G32_SHIFT) | 97 (r << SK_R32_SHIFT) | 98 (a << SK_A32_SHIFT); 99 } 100 101 void ConvertYUVToRGB32Row_C(const uint8* y_buf, 102 const uint8* u_buf, 103 const uint8* v_buf, 104 uint8* rgb_buf, 105 ptrdiff_t width, 106 const int16 convert_table[1024][4]) { 107 for (int x = 0; x < width; x += 2) { 108 uint8 u = u_buf[x >> 1]; 109 uint8 v = v_buf[x >> 1]; 110 uint8 y0 = y_buf[x]; 111 ConvertYUVToRGB32_C(y0, u, v, rgb_buf, convert_table); 112 if ((x + 1) < width) { 113 uint8 y1 = y_buf[x + 1]; 114 ConvertYUVToRGB32_C(y1, u, v, rgb_buf + 4, convert_table); 115 } 116 rgb_buf += 8; // Advance 2 pixels. 117 } 118 } 119 120 void ConvertYUVAToARGBRow_C(const uint8* y_buf, 121 const uint8* u_buf, 122 const uint8* v_buf, 123 const uint8* a_buf, 124 uint8* rgba_buf, 125 ptrdiff_t width, 126 const int16 convert_table[1024][4]) { 127 for (int x = 0; x < width; x += 2) { 128 uint8 u = u_buf[x >> 1]; 129 uint8 v = v_buf[x >> 1]; 130 uint8 y0 = y_buf[x]; 131 uint8 a0 = a_buf[x]; 132 ConvertYUVAToARGB_C(y0, u, v, a0, rgba_buf, convert_table); 133 if ((x + 1) < width) { 134 uint8 y1 = y_buf[x + 1]; 135 uint8 a1 = a_buf[x + 1]; 136 ConvertYUVAToARGB_C(y1, u, v, a1, rgba_buf + 4, convert_table); 137 } 138 rgba_buf += 8; // Advance 2 pixels. 139 } 140 } 141 142 // 16.16 fixed point is used. A shift by 16 isolates the integer. 143 // A shift by 17 is used to further subsample the chrominence channels. 144 // & 0xffff isolates the fixed point fraction. >> 2 to get the upper 2 bits, 145 // for 1/65536 pixel accurate interpolation. 146 void ScaleYUVToRGB32Row_C(const uint8* y_buf, 147 const uint8* u_buf, 148 const uint8* v_buf, 149 uint8* rgb_buf, 150 ptrdiff_t width, 151 ptrdiff_t source_dx, 152 const int16 convert_table[1024][4]) { 153 int x = 0; 154 for (int i = 0; i < width; i += 2) { 155 int y = y_buf[x >> 16]; 156 int u = u_buf[(x >> 17)]; 157 int v = v_buf[(x >> 17)]; 158 ConvertYUVToRGB32_C(y, u, v, rgb_buf, convert_table); 159 x += source_dx; 160 if ((i + 1) < width) { 161 y = y_buf[x >> 16]; 162 ConvertYUVToRGB32_C(y, u, v, rgb_buf+4, convert_table); 163 x += source_dx; 164 } 165 rgb_buf += 8; 166 } 167 } 168 169 void LinearScaleYUVToRGB32Row_C(const uint8* y_buf, 170 const uint8* u_buf, 171 const uint8* v_buf, 172 uint8* rgb_buf, 173 ptrdiff_t width, 174 ptrdiff_t source_dx, 175 const int16 convert_table[1024][4]) { 176 // Avoid point-sampling for down-scaling by > 2:1. 177 int source_x = 0; 178 if (source_dx >= 0x20000) 179 source_x += 0x8000; 180 LinearScaleYUVToRGB32RowWithRange_C(y_buf, u_buf, v_buf, rgb_buf, width, 181 source_x, source_dx, convert_table); 182 } 183 184 void LinearScaleYUVToRGB32RowWithRange_C(const uint8* y_buf, 185 const uint8* u_buf, 186 const uint8* v_buf, 187 uint8* rgb_buf, 188 int dest_width, 189 int x, 190 int source_dx, 191 const int16 convert_table[1024][4]) { 192 for (int i = 0; i < dest_width; i += 2) { 193 int y0 = y_buf[x >> 16]; 194 int y1 = y_buf[(x >> 16) + 1]; 195 int u0 = u_buf[(x >> 17)]; 196 int u1 = u_buf[(x >> 17) + 1]; 197 int v0 = v_buf[(x >> 17)]; 198 int v1 = v_buf[(x >> 17) + 1]; 199 int y_frac = (x & 65535); 200 int uv_frac = ((x >> 1) & 65535); 201 int y = (y_frac * y1 + (y_frac ^ 65535) * y0) >> 16; 202 int u = (uv_frac * u1 + (uv_frac ^ 65535) * u0) >> 16; 203 int v = (uv_frac * v1 + (uv_frac ^ 65535) * v0) >> 16; 204 ConvertYUVToRGB32_C(y, u, v, rgb_buf, convert_table); 205 x += source_dx; 206 if ((i + 1) < dest_width) { 207 y0 = y_buf[x >> 16]; 208 y1 = y_buf[(x >> 16) + 1]; 209 y_frac = (x & 65535); 210 y = (y_frac * y1 + (y_frac ^ 65535) * y0) >> 16; 211 ConvertYUVToRGB32_C(y, u, v, rgb_buf+4, convert_table); 212 x += source_dx; 213 } 214 rgb_buf += 8; 215 } 216 } 217 218 void ConvertYUVToRGB32_C(const uint8* yplane, 219 const uint8* uplane, 220 const uint8* vplane, 221 uint8* rgbframe, 222 int width, 223 int height, 224 int ystride, 225 int uvstride, 226 int rgbstride, 227 YUVType yuv_type) { 228 unsigned int y_shift = GetVerticalShift(yuv_type); 229 for (int y = 0; y < height; ++y) { 230 uint8* rgb_row = rgbframe + y * rgbstride; 231 const uint8* y_ptr = yplane + y * ystride; 232 const uint8* u_ptr = uplane + (y >> y_shift) * uvstride; 233 const uint8* v_ptr = vplane + (y >> y_shift) * uvstride; 234 235 ConvertYUVToRGB32Row_C(y_ptr, 236 u_ptr, 237 v_ptr, 238 rgb_row, 239 width, 240 GetLookupTable(yuv_type)); 241 } 242 } 243 244 void ConvertYUVAToARGB_C(const uint8* yplane, 245 const uint8* uplane, 246 const uint8* vplane, 247 const uint8* aplane, 248 uint8* rgbaframe, 249 int width, 250 int height, 251 int ystride, 252 int uvstride, 253 int astride, 254 int rgbastride, 255 YUVType yuv_type) { 256 unsigned int y_shift = yuv_type; 257 for (int y = 0; y < height; y++) { 258 uint8* rgba_row = rgbaframe + y * rgbastride; 259 const uint8* y_ptr = yplane + y * ystride; 260 const uint8* u_ptr = uplane + (y >> y_shift) * uvstride; 261 const uint8* v_ptr = vplane + (y >> y_shift) * uvstride; 262 const uint8* a_ptr = aplane + y * astride; 263 264 ConvertYUVAToARGBRow_C(y_ptr, 265 u_ptr, 266 v_ptr, 267 a_ptr, 268 rgba_row, 269 width, 270 GetLookupTable(yuv_type)); 271 } 272 } 273 274 } // namespace media 275
