1 // Copyright 2014 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->RGB conversion functions 11 // 12 // Author: Skal (pascal.massimino (at) gmail.com) 13 14 #include "./yuv.h" 15 16 #if defined(WEBP_USE_SSE2) 17 18 #include <emmintrin.h> 19 20 //----------------------------------------------------------------------------- 21 // Convert spans of 32 pixels to various RGB formats for the fancy upsampler. 22 23 // These constants are 14b fixed-point version of ITU-R BT.601 constants. 24 // R = (19077 * y + 26149 * v - 14234) >> 6 25 // G = (19077 * y - 6419 * u - 13320 * v + 8708) >> 6 26 // B = (19077 * y + 33050 * u - 17685) >> 6 27 static void ConvertYUV444ToRGB(const __m128i* const Y0, 28 const __m128i* const U0, 29 const __m128i* const V0, 30 __m128i* const R, 31 __m128i* const G, 32 __m128i* const B) { 33 const __m128i k19077 = _mm_set1_epi16(19077); 34 const __m128i k26149 = _mm_set1_epi16(26149); 35 const __m128i k14234 = _mm_set1_epi16(14234); 36 const __m128i k33050 = _mm_set1_epi16(33050); 37 const __m128i k17685 = _mm_set1_epi16(17685); 38 const __m128i k6419 = _mm_set1_epi16(6419); 39 const __m128i k13320 = _mm_set1_epi16(13320); 40 const __m128i k8708 = _mm_set1_epi16(8708); 41 42 const __m128i Y1 = _mm_mulhi_epu16(*Y0, k19077); 43 44 const __m128i R0 = _mm_mulhi_epu16(*V0, k26149); 45 const __m128i R1 = _mm_sub_epi16(Y1, k14234); 46 const __m128i R2 = _mm_add_epi16(R1, R0); 47 48 const __m128i G0 = _mm_mulhi_epu16(*U0, k6419); 49 const __m128i G1 = _mm_mulhi_epu16(*V0, k13320); 50 const __m128i G2 = _mm_add_epi16(Y1, k8708); 51 const __m128i G3 = _mm_add_epi16(G0, G1); 52 const __m128i G4 = _mm_sub_epi16(G2, G3); 53 54 // be careful with the saturated *unsigned* arithmetic here! 55 const __m128i B0 = _mm_mulhi_epu16(*U0, k33050); 56 const __m128i B1 = _mm_adds_epu16(B0, Y1); 57 const __m128i B2 = _mm_subs_epu16(B1, k17685); 58 59 // use logical shift for B2, which can be larger than 32767 60 *R = _mm_srai_epi16(R2, 6); // range: [-14234, 30815] 61 *G = _mm_srai_epi16(G4, 6); // range: [-10953, 27710] 62 *B = _mm_srli_epi16(B2, 6); // range: [0, 34238] 63 } 64 65 // Load the bytes into the *upper* part of 16b words. That's "<< 8", basically. 66 static WEBP_INLINE __m128i Load_HI_16(const uint8_t* src) { 67 const __m128i zero = _mm_setzero_si128(); 68 return _mm_unpacklo_epi8(zero, _mm_loadl_epi64((const __m128i*)src)); 69 } 70 71 // Load and replicate the U/V samples 72 static WEBP_INLINE __m128i Load_UV_HI_8(const uint8_t* src) { 73 const __m128i zero = _mm_setzero_si128(); 74 const __m128i tmp0 = _mm_cvtsi32_si128(*(const uint32_t*)src); 75 const __m128i tmp1 = _mm_unpacklo_epi8(zero, tmp0); 76 return _mm_unpacklo_epi16(tmp1, tmp1); // replicate samples 77 } 78 79 // Convert 32 samples of YUV444 to R/G/B 80 static void YUV444ToRGB(const uint8_t* const y, 81 const uint8_t* const u, 82 const uint8_t* const v, 83 __m128i* const R, __m128i* const G, __m128i* const B) { 84 const __m128i Y0 = Load_HI_16(y), U0 = Load_HI_16(u), V0 = Load_HI_16(v); 85 ConvertYUV444ToRGB(&Y0, &U0, &V0, R, G, B); 86 } 87 88 // Convert 32 samples of YUV420 to R/G/B 89 static void YUV420ToRGB(const uint8_t* const y, 90 const uint8_t* const u, 91 const uint8_t* const v, 92 __m128i* const R, __m128i* const G, __m128i* const B) { 93 const __m128i Y0 = Load_HI_16(y), U0 = Load_UV_HI_8(u), V0 = Load_UV_HI_8(v); 94 ConvertYUV444ToRGB(&Y0, &U0, &V0, R, G, B); 95 } 96 97 // Pack R/G/B/A results into 32b output. 98 static WEBP_INLINE void PackAndStore4(const __m128i* const R, 99 const __m128i* const G, 100 const __m128i* const B, 101 const __m128i* const A, 102 uint8_t* const dst) { 103 const __m128i rb = _mm_packus_epi16(*R, *B); 104 const __m128i ga = _mm_packus_epi16(*G, *A); 105 const __m128i rg = _mm_unpacklo_epi8(rb, ga); 106 const __m128i ba = _mm_unpackhi_epi8(rb, ga); 107 const __m128i RGBA_lo = _mm_unpacklo_epi16(rg, ba); 108 const __m128i RGBA_hi = _mm_unpackhi_epi16(rg, ba); 109 _mm_storeu_si128((__m128i*)(dst + 0), RGBA_lo); 110 _mm_storeu_si128((__m128i*)(dst + 16), RGBA_hi); 111 } 112 113 // Pack R/G/B/A results into 16b output. 114 static WEBP_INLINE void PackAndStore4444(const __m128i* const R, 115 const __m128i* const G, 116 const __m128i* const B, 117 const __m128i* const A, 118 uint8_t* const dst) { 119 #if !defined(WEBP_SWAP_16BIT_CSP) 120 const __m128i rg0 = _mm_packus_epi16(*R, *G); 121 const __m128i ba0 = _mm_packus_epi16(*B, *A); 122 #else 123 const __m128i rg0 = _mm_packus_epi16(*B, *A); 124 const __m128i ba0 = _mm_packus_epi16(*R, *G); 125 #endif 126 const __m128i mask_0xf0 = _mm_set1_epi8(0xf0); 127 const __m128i rb1 = _mm_unpacklo_epi8(rg0, ba0); // rbrbrbrbrb... 128 const __m128i ga1 = _mm_unpackhi_epi8(rg0, ba0); // gagagagaga... 129 const __m128i rb2 = _mm_and_si128(rb1, mask_0xf0); 130 const __m128i ga2 = _mm_srli_epi16(_mm_and_si128(ga1, mask_0xf0), 4); 131 const __m128i rgba4444 = _mm_or_si128(rb2, ga2); 132 _mm_storeu_si128((__m128i*)dst, rgba4444); 133 } 134 135 // Pack R/G/B results into 16b output. 136 static WEBP_INLINE void PackAndStore565(const __m128i* const R, 137 const __m128i* const G, 138 const __m128i* const B, 139 uint8_t* const dst) { 140 const __m128i r0 = _mm_packus_epi16(*R, *R); 141 const __m128i g0 = _mm_packus_epi16(*G, *G); 142 const __m128i b0 = _mm_packus_epi16(*B, *B); 143 const __m128i r1 = _mm_and_si128(r0, _mm_set1_epi8(0xf8)); 144 const __m128i b1 = _mm_and_si128(_mm_srli_epi16(b0, 3), _mm_set1_epi8(0x1f)); 145 const __m128i g1 = _mm_srli_epi16(_mm_and_si128(g0, _mm_set1_epi8(0xe0)), 5); 146 const __m128i g2 = _mm_slli_epi16(_mm_and_si128(g0, _mm_set1_epi8(0x1c)), 3); 147 const __m128i rg = _mm_or_si128(r1, g1); 148 const __m128i gb = _mm_or_si128(g2, b1); 149 #if !defined(WEBP_SWAP_16BIT_CSP) 150 const __m128i rgb565 = _mm_unpacklo_epi8(rg, gb); 151 #else 152 const __m128i rgb565 = _mm_unpacklo_epi8(gb, rg); 153 #endif 154 _mm_storeu_si128((__m128i*)dst, rgb565); 155 } 156 157 // Function used several times in PlanarTo24b. 158 // It samples the in buffer as follows: one every two unsigned char is stored 159 // at the beginning of the buffer, while the other half is stored at the end. 160 static WEBP_INLINE void PlanarTo24bHelper(const __m128i* const in /*in[6]*/, 161 __m128i* const out /*out[6]*/) { 162 const __m128i v_mask = _mm_set1_epi16(0x00ff); 163 164 // Take one every two upper 8b values. 165 out[0] = _mm_packus_epi16(_mm_and_si128(in[0], v_mask), 166 _mm_and_si128(in[1], v_mask)); 167 out[1] = _mm_packus_epi16(_mm_and_si128(in[2], v_mask), 168 _mm_and_si128(in[3], v_mask)); 169 out[2] = _mm_packus_epi16(_mm_and_si128(in[4], v_mask), 170 _mm_and_si128(in[5], v_mask)); 171 // Take one every two lower 8b values. 172 out[3] = _mm_packus_epi16(_mm_srli_epi16(in[0], 8), _mm_srli_epi16(in[1], 8)); 173 out[4] = _mm_packus_epi16(_mm_srli_epi16(in[2], 8), _mm_srli_epi16(in[3], 8)); 174 out[5] = _mm_packus_epi16(_mm_srli_epi16(in[4], 8), _mm_srli_epi16(in[5], 8)); 175 } 176 177 // Pack the planar buffers 178 // rrrr... rrrr... gggg... gggg... bbbb... bbbb.... 179 // triplet by triplet in the output buffer rgb as rgbrgbrgbrgb ... 180 static WEBP_INLINE void PlanarTo24b(__m128i* const in /*in[6]*/, uint8_t* rgb) { 181 // The input is 6 registers of sixteen 8b but for the sake of explanation, 182 // let's take 6 registers of four 8b values. 183 // To pack, we will keep taking one every two 8b integer and move it 184 // around as follows: 185 // Input: 186 // r0r1r2r3 | r4r5r6r7 | g0g1g2g3 | g4g5g6g7 | b0b1b2b3 | b4b5b6b7 187 // Split the 6 registers in two sets of 3 registers: the first set as the even 188 // 8b bytes, the second the odd ones: 189 // r0r2r4r6 | g0g2g4g6 | b0b2b4b6 | r1r3r5r7 | g1g3g5g7 | b1b3b5b7 190 // Repeat the same permutations twice more: 191 // r0r4g0g4 | b0b4r1r5 | g1g5b1b5 | r2r6g2g6 | b2b6r3r7 | g3g7b3b7 192 // r0g0b0r1 | g1b1r2g2 | b2r3g3b3 | r4g4b4r5 | g5b5r6g6 | b6r7g7b7 193 __m128i tmp[6]; 194 PlanarTo24bHelper(in, tmp); 195 PlanarTo24bHelper(tmp, in); 196 PlanarTo24bHelper(in, tmp); 197 // We need to do it two more times than the example as we have sixteen bytes. 198 PlanarTo24bHelper(tmp, in); 199 PlanarTo24bHelper(in, tmp); 200 201 _mm_storeu_si128((__m128i*)(rgb + 0), tmp[0]); 202 _mm_storeu_si128((__m128i*)(rgb + 16), tmp[1]); 203 _mm_storeu_si128((__m128i*)(rgb + 32), tmp[2]); 204 _mm_storeu_si128((__m128i*)(rgb + 48), tmp[3]); 205 _mm_storeu_si128((__m128i*)(rgb + 64), tmp[4]); 206 _mm_storeu_si128((__m128i*)(rgb + 80), tmp[5]); 207 } 208 #undef MK_UINT32 209 210 void VP8YuvToRgba32(const uint8_t* y, const uint8_t* u, const uint8_t* v, 211 uint8_t* dst) { 212 const __m128i kAlpha = _mm_set1_epi16(255); 213 int n; 214 for (n = 0; n < 32; n += 8, dst += 32) { 215 __m128i R, G, B; 216 YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B); 217 PackAndStore4(&R, &G, &B, &kAlpha, dst); 218 } 219 } 220 221 void VP8YuvToBgra32(const uint8_t* y, const uint8_t* u, const uint8_t* v, 222 uint8_t* dst) { 223 const __m128i kAlpha = _mm_set1_epi16(255); 224 int n; 225 for (n = 0; n < 32; n += 8, dst += 32) { 226 __m128i R, G, B; 227 YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B); 228 PackAndStore4(&B, &G, &R, &kAlpha, dst); 229 } 230 } 231 232 void VP8YuvToArgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v, 233 uint8_t* dst) { 234 const __m128i kAlpha = _mm_set1_epi16(255); 235 int n; 236 for (n = 0; n < 32; n += 8, dst += 32) { 237 __m128i R, G, B; 238 YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B); 239 PackAndStore4(&kAlpha, &R, &G, &B, dst); 240 } 241 } 242 243 void VP8YuvToRgba444432(const uint8_t* y, const uint8_t* u, const uint8_t* v, 244 uint8_t* dst) { 245 const __m128i kAlpha = _mm_set1_epi16(255); 246 int n; 247 for (n = 0; n < 32; n += 8, dst += 16) { 248 __m128i R, G, B; 249 YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B); 250 PackAndStore4444(&R, &G, &B, &kAlpha, dst); 251 } 252 } 253 254 void VP8YuvToRgb56532(const uint8_t* y, const uint8_t* u, const uint8_t* v, 255 uint8_t* dst) { 256 int n; 257 for (n = 0; n < 32; n += 8, dst += 16) { 258 __m128i R, G, B; 259 YUV444ToRGB(y + n, u + n, v + n, &R, &G, &B); 260 PackAndStore565(&R, &G, &B, dst); 261 } 262 } 263 264 void VP8YuvToRgb32(const uint8_t* y, const uint8_t* u, const uint8_t* v, 265 uint8_t* dst) { 266 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 267 __m128i rgb[6]; 268 269 YUV444ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0); 270 YUV444ToRGB(y + 8, u + 8, v + 8, &R1, &G1, &B1); 271 YUV444ToRGB(y + 16, u + 16, v + 16, &R2, &G2, &B2); 272 YUV444ToRGB(y + 24, u + 24, v + 24, &R3, &G3, &B3); 273 274 // Cast to 8b and store as RRRRGGGGBBBB. 275 rgb[0] = _mm_packus_epi16(R0, R1); 276 rgb[1] = _mm_packus_epi16(R2, R3); 277 rgb[2] = _mm_packus_epi16(G0, G1); 278 rgb[3] = _mm_packus_epi16(G2, G3); 279 rgb[4] = _mm_packus_epi16(B0, B1); 280 rgb[5] = _mm_packus_epi16(B2, B3); 281 282 // Pack as RGBRGBRGBRGB. 283 PlanarTo24b(rgb, dst); 284 } 285 286 void VP8YuvToBgr32(const uint8_t* y, const uint8_t* u, const uint8_t* v, 287 uint8_t* dst) { 288 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 289 __m128i bgr[6]; 290 291 YUV444ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0); 292 YUV444ToRGB(y + 8, u + 8, v + 8, &R1, &G1, &B1); 293 YUV444ToRGB(y + 16, u + 16, v + 16, &R2, &G2, &B2); 294 YUV444ToRGB(y + 24, u + 24, v + 24, &R3, &G3, &B3); 295 296 // Cast to 8b and store as BBBBGGGGRRRR. 297 bgr[0] = _mm_packus_epi16(B0, B1); 298 bgr[1] = _mm_packus_epi16(B2, B3); 299 bgr[2] = _mm_packus_epi16(G0, G1); 300 bgr[3] = _mm_packus_epi16(G2, G3); 301 bgr[4] = _mm_packus_epi16(R0, R1); 302 bgr[5] = _mm_packus_epi16(R2, R3); 303 304 // Pack as BGRBGRBGRBGR. 305 PlanarTo24b(bgr, dst); 306 } 307 308 //----------------------------------------------------------------------------- 309 // Arbitrary-length row conversion functions 310 311 static void YuvToRgbaRow(const uint8_t* y, const uint8_t* u, const uint8_t* v, 312 uint8_t* dst, int len) { 313 const __m128i kAlpha = _mm_set1_epi16(255); 314 int n; 315 for (n = 0; n + 8 <= len; n += 8, dst += 32) { 316 __m128i R, G, B; 317 YUV420ToRGB(y, u, v, &R, &G, &B); 318 PackAndStore4(&R, &G, &B, &kAlpha, dst); 319 y += 8; 320 u += 4; 321 v += 4; 322 } 323 for (; n < len; ++n) { // Finish off 324 VP8YuvToRgba(y[0], u[0], v[0], dst); 325 dst += 4; 326 y += 1; 327 u += (n & 1); 328 v += (n & 1); 329 } 330 } 331 332 static void YuvToBgraRow(const uint8_t* y, const uint8_t* u, const uint8_t* v, 333 uint8_t* dst, int len) { 334 const __m128i kAlpha = _mm_set1_epi16(255); 335 int n; 336 for (n = 0; n + 8 <= len; n += 8, dst += 32) { 337 __m128i R, G, B; 338 YUV420ToRGB(y, u, v, &R, &G, &B); 339 PackAndStore4(&B, &G, &R, &kAlpha, dst); 340 y += 8; 341 u += 4; 342 v += 4; 343 } 344 for (; n < len; ++n) { // Finish off 345 VP8YuvToBgra(y[0], u[0], v[0], dst); 346 dst += 4; 347 y += 1; 348 u += (n & 1); 349 v += (n & 1); 350 } 351 } 352 353 static void YuvToArgbRow(const uint8_t* y, const uint8_t* u, const uint8_t* v, 354 uint8_t* dst, int len) { 355 const __m128i kAlpha = _mm_set1_epi16(255); 356 int n; 357 for (n = 0; n + 8 <= len; n += 8, dst += 32) { 358 __m128i R, G, B; 359 YUV420ToRGB(y, u, v, &R, &G, &B); 360 PackAndStore4(&kAlpha, &R, &G, &B, dst); 361 y += 8; 362 u += 4; 363 v += 4; 364 } 365 for (; n < len; ++n) { // Finish off 366 VP8YuvToArgb(y[0], u[0], v[0], dst); 367 dst += 4; 368 y += 1; 369 u += (n & 1); 370 v += (n & 1); 371 } 372 } 373 374 static void YuvToRgbRow(const uint8_t* y, const uint8_t* u, const uint8_t* v, 375 uint8_t* dst, int len) { 376 int n; 377 for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) { 378 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 379 __m128i rgb[6]; 380 381 YUV420ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0); 382 YUV420ToRGB(y + 8, u + 4, v + 4, &R1, &G1, &B1); 383 YUV420ToRGB(y + 16, u + 8, v + 8, &R2, &G2, &B2); 384 YUV420ToRGB(y + 24, u + 12, v + 12, &R3, &G3, &B3); 385 386 // Cast to 8b and store as RRRRGGGGBBBB. 387 rgb[0] = _mm_packus_epi16(R0, R1); 388 rgb[1] = _mm_packus_epi16(R2, R3); 389 rgb[2] = _mm_packus_epi16(G0, G1); 390 rgb[3] = _mm_packus_epi16(G2, G3); 391 rgb[4] = _mm_packus_epi16(B0, B1); 392 rgb[5] = _mm_packus_epi16(B2, B3); 393 394 // Pack as RGBRGBRGBRGB. 395 PlanarTo24b(rgb, dst); 396 397 y += 32; 398 u += 16; 399 v += 16; 400 } 401 for (; n < len; ++n) { // Finish off 402 VP8YuvToRgb(y[0], u[0], v[0], dst); 403 dst += 3; 404 y += 1; 405 u += (n & 1); 406 v += (n & 1); 407 } 408 } 409 410 static void YuvToBgrRow(const uint8_t* y, const uint8_t* u, const uint8_t* v, 411 uint8_t* dst, int len) { 412 int n; 413 for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) { 414 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 415 __m128i bgr[6]; 416 417 YUV420ToRGB(y + 0, u + 0, v + 0, &R0, &G0, &B0); 418 YUV420ToRGB(y + 8, u + 4, v + 4, &R1, &G1, &B1); 419 YUV420ToRGB(y + 16, u + 8, v + 8, &R2, &G2, &B2); 420 YUV420ToRGB(y + 24, u + 12, v + 12, &R3, &G3, &B3); 421 422 // Cast to 8b and store as BBBBGGGGRRRR. 423 bgr[0] = _mm_packus_epi16(B0, B1); 424 bgr[1] = _mm_packus_epi16(B2, B3); 425 bgr[2] = _mm_packus_epi16(G0, G1); 426 bgr[3] = _mm_packus_epi16(G2, G3); 427 bgr[4] = _mm_packus_epi16(R0, R1); 428 bgr[5] = _mm_packus_epi16(R2, R3); 429 430 // Pack as BGRBGRBGRBGR. 431 PlanarTo24b(bgr, dst); 432 433 y += 32; 434 u += 16; 435 v += 16; 436 } 437 for (; n < len; ++n) { // Finish off 438 VP8YuvToBgr(y[0], u[0], v[0], dst); 439 dst += 3; 440 y += 1; 441 u += (n & 1); 442 v += (n & 1); 443 } 444 } 445 446 //------------------------------------------------------------------------------ 447 // Entry point 448 449 extern void WebPInitSamplersSSE2(void); 450 451 WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersSSE2(void) { 452 WebPSamplers[MODE_RGB] = YuvToRgbRow; 453 WebPSamplers[MODE_RGBA] = YuvToRgbaRow; 454 WebPSamplers[MODE_BGR] = YuvToBgrRow; 455 WebPSamplers[MODE_BGRA] = YuvToBgraRow; 456 WebPSamplers[MODE_ARGB] = YuvToArgbRow; 457 } 458 459 //------------------------------------------------------------------------------ 460 // RGB24/32 -> YUV converters 461 462 // Load eight 16b-words from *src. 463 #define LOAD_16(src) _mm_loadu_si128((const __m128i*)(src)) 464 // Store either 16b-words into *dst 465 #define STORE_16(V, dst) _mm_storeu_si128((__m128i*)(dst), (V)) 466 467 // Function that inserts a value of the second half of the in buffer in between 468 // every two char of the first half. 469 static WEBP_INLINE void RGB24PackedToPlanarHelper( 470 const __m128i* const in /*in[6]*/, __m128i* const out /*out[6]*/) { 471 out[0] = _mm_unpacklo_epi8(in[0], in[3]); 472 out[1] = _mm_unpackhi_epi8(in[0], in[3]); 473 out[2] = _mm_unpacklo_epi8(in[1], in[4]); 474 out[3] = _mm_unpackhi_epi8(in[1], in[4]); 475 out[4] = _mm_unpacklo_epi8(in[2], in[5]); 476 out[5] = _mm_unpackhi_epi8(in[2], in[5]); 477 } 478 479 // Unpack the 8b input rgbrgbrgbrgb ... as contiguous registers: 480 // rrrr... rrrr... gggg... gggg... bbbb... bbbb.... 481 // Similar to PlanarTo24bHelper(), but in reverse order. 482 static WEBP_INLINE void RGB24PackedToPlanar(const uint8_t* const rgb, 483 __m128i* const out /*out[6]*/) { 484 __m128i tmp[6]; 485 tmp[0] = _mm_loadu_si128((const __m128i*)(rgb + 0)); 486 tmp[1] = _mm_loadu_si128((const __m128i*)(rgb + 16)); 487 tmp[2] = _mm_loadu_si128((const __m128i*)(rgb + 32)); 488 tmp[3] = _mm_loadu_si128((const __m128i*)(rgb + 48)); 489 tmp[4] = _mm_loadu_si128((const __m128i*)(rgb + 64)); 490 tmp[5] = _mm_loadu_si128((const __m128i*)(rgb + 80)); 491 492 RGB24PackedToPlanarHelper(tmp, out); 493 RGB24PackedToPlanarHelper(out, tmp); 494 RGB24PackedToPlanarHelper(tmp, out); 495 RGB24PackedToPlanarHelper(out, tmp); 496 RGB24PackedToPlanarHelper(tmp, out); 497 } 498 499 // Convert 8 packed ARGB to r[], g[], b[] 500 static WEBP_INLINE void RGB32PackedToPlanar(const uint32_t* const argb, 501 __m128i* const r, 502 __m128i* const g, 503 __m128i* const b) { 504 const __m128i zero = _mm_setzero_si128(); 505 const __m128i in0 = LOAD_16(argb + 0); // argb3 | argb2 | argb1 | argb0 506 const __m128i in1 = LOAD_16(argb + 4); // argb7 | argb6 | argb5 | argb4 507 // column-wise transpose 508 const __m128i A0 = _mm_unpacklo_epi8(in0, in1); 509 const __m128i A1 = _mm_unpackhi_epi8(in0, in1); 510 const __m128i B0 = _mm_unpacklo_epi8(A0, A1); 511 const __m128i B1 = _mm_unpackhi_epi8(A0, A1); 512 // C0 = g7 g6 ... g1 g0 | b7 b6 ... b1 b0 513 // C1 = a7 a6 ... a1 a0 | r7 r6 ... r1 r0 514 const __m128i C0 = _mm_unpacklo_epi8(B0, B1); 515 const __m128i C1 = _mm_unpackhi_epi8(B0, B1); 516 // store 16b 517 *r = _mm_unpacklo_epi8(C1, zero); 518 *g = _mm_unpackhi_epi8(C0, zero); 519 *b = _mm_unpacklo_epi8(C0, zero); 520 } 521 522 // This macro computes (RG * MULT_RG + GB * MULT_GB + ROUNDER) >> DESCALE_FIX 523 // It's a macro and not a function because we need to use immediate values with 524 // srai_epi32, e.g. 525 #define TRANSFORM(RG_LO, RG_HI, GB_LO, GB_HI, MULT_RG, MULT_GB, \ 526 ROUNDER, DESCALE_FIX, OUT) do { \ 527 const __m128i V0_lo = _mm_madd_epi16(RG_LO, MULT_RG); \ 528 const __m128i V0_hi = _mm_madd_epi16(RG_HI, MULT_RG); \ 529 const __m128i V1_lo = _mm_madd_epi16(GB_LO, MULT_GB); \ 530 const __m128i V1_hi = _mm_madd_epi16(GB_HI, MULT_GB); \ 531 const __m128i V2_lo = _mm_add_epi32(V0_lo, V1_lo); \ 532 const __m128i V2_hi = _mm_add_epi32(V0_hi, V1_hi); \ 533 const __m128i V3_lo = _mm_add_epi32(V2_lo, ROUNDER); \ 534 const __m128i V3_hi = _mm_add_epi32(V2_hi, ROUNDER); \ 535 const __m128i V5_lo = _mm_srai_epi32(V3_lo, DESCALE_FIX); \ 536 const __m128i V5_hi = _mm_srai_epi32(V3_hi, DESCALE_FIX); \ 537 (OUT) = _mm_packs_epi32(V5_lo, V5_hi); \ 538 } while (0) 539 540 #define MK_CST_16(A, B) _mm_set_epi16((B), (A), (B), (A), (B), (A), (B), (A)) 541 static WEBP_INLINE void ConvertRGBToY(const __m128i* const R, 542 const __m128i* const G, 543 const __m128i* const B, 544 __m128i* const Y) { 545 const __m128i kRG_y = MK_CST_16(16839, 33059 - 16384); 546 const __m128i kGB_y = MK_CST_16(16384, 6420); 547 const __m128i kHALF_Y = _mm_set1_epi32((16 << YUV_FIX) + YUV_HALF); 548 549 const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G); 550 const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G); 551 const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B); 552 const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B); 553 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_y, kGB_y, kHALF_Y, YUV_FIX, *Y); 554 } 555 556 static WEBP_INLINE void ConvertRGBToUV(const __m128i* const R, 557 const __m128i* const G, 558 const __m128i* const B, 559 __m128i* const U, __m128i* const V) { 560 const __m128i kRG_u = MK_CST_16(-9719, -19081); 561 const __m128i kGB_u = MK_CST_16(0, 28800); 562 const __m128i kRG_v = MK_CST_16(28800, 0); 563 const __m128i kGB_v = MK_CST_16(-24116, -4684); 564 const __m128i kHALF_UV = _mm_set1_epi32(((128 << YUV_FIX) + YUV_HALF) << 2); 565 566 const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G); 567 const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G); 568 const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B); 569 const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B); 570 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_u, kGB_u, 571 kHALF_UV, YUV_FIX + 2, *U); 572 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_v, kGB_v, 573 kHALF_UV, YUV_FIX + 2, *V); 574 } 575 576 #undef MK_CST_16 577 #undef TRANSFORM 578 579 static void ConvertRGB24ToY(const uint8_t* rgb, uint8_t* y, int width) { 580 const int max_width = width & ~31; 581 int i; 582 for (i = 0; i < max_width; rgb += 3 * 16 * 2) { 583 __m128i rgb_plane[6]; 584 int j; 585 586 RGB24PackedToPlanar(rgb, rgb_plane); 587 588 for (j = 0; j < 2; ++j, i += 16) { 589 const __m128i zero = _mm_setzero_si128(); 590 __m128i r, g, b, Y0, Y1; 591 592 // Convert to 16-bit Y. 593 r = _mm_unpacklo_epi8(rgb_plane[0 + j], zero); 594 g = _mm_unpacklo_epi8(rgb_plane[2 + j], zero); 595 b = _mm_unpacklo_epi8(rgb_plane[4 + j], zero); 596 ConvertRGBToY(&r, &g, &b, &Y0); 597 598 // Convert to 16-bit Y. 599 r = _mm_unpackhi_epi8(rgb_plane[0 + j], zero); 600 g = _mm_unpackhi_epi8(rgb_plane[2 + j], zero); 601 b = _mm_unpackhi_epi8(rgb_plane[4 + j], zero); 602 ConvertRGBToY(&r, &g, &b, &Y1); 603 604 // Cast to 8-bit and store. 605 STORE_16(_mm_packus_epi16(Y0, Y1), y + i); 606 } 607 } 608 for (; i < width; ++i, rgb += 3) { // left-over 609 y[i] = VP8RGBToY(rgb[0], rgb[1], rgb[2], YUV_HALF); 610 } 611 } 612 613 static void ConvertBGR24ToY(const uint8_t* bgr, uint8_t* y, int width) { 614 const int max_width = width & ~31; 615 int i; 616 for (i = 0; i < max_width; bgr += 3 * 16 * 2) { 617 __m128i bgr_plane[6]; 618 int j; 619 620 RGB24PackedToPlanar(bgr, bgr_plane); 621 622 for (j = 0; j < 2; ++j, i += 16) { 623 const __m128i zero = _mm_setzero_si128(); 624 __m128i r, g, b, Y0, Y1; 625 626 // Convert to 16-bit Y. 627 b = _mm_unpacklo_epi8(bgr_plane[0 + j], zero); 628 g = _mm_unpacklo_epi8(bgr_plane[2 + j], zero); 629 r = _mm_unpacklo_epi8(bgr_plane[4 + j], zero); 630 ConvertRGBToY(&r, &g, &b, &Y0); 631 632 // Convert to 16-bit Y. 633 b = _mm_unpackhi_epi8(bgr_plane[0 + j], zero); 634 g = _mm_unpackhi_epi8(bgr_plane[2 + j], zero); 635 r = _mm_unpackhi_epi8(bgr_plane[4 + j], zero); 636 ConvertRGBToY(&r, &g, &b, &Y1); 637 638 // Cast to 8-bit and store. 639 STORE_16(_mm_packus_epi16(Y0, Y1), y + i); 640 } 641 } 642 for (; i < width; ++i, bgr += 3) { // left-over 643 y[i] = VP8RGBToY(bgr[2], bgr[1], bgr[0], YUV_HALF); 644 } 645 } 646 647 static void ConvertARGBToY(const uint32_t* argb, uint8_t* y, int width) { 648 const int max_width = width & ~15; 649 int i; 650 for (i = 0; i < max_width; i += 16) { 651 __m128i r, g, b, Y0, Y1; 652 RGB32PackedToPlanar(&argb[i + 0], &r, &g, &b); 653 ConvertRGBToY(&r, &g, &b, &Y0); 654 RGB32PackedToPlanar(&argb[i + 8], &r, &g, &b); 655 ConvertRGBToY(&r, &g, &b, &Y1); 656 STORE_16(_mm_packus_epi16(Y0, Y1), y + i); 657 } 658 for (; i < width; ++i) { // left-over 659 const uint32_t p = argb[i]; 660 y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >> 0) & 0xff, 661 YUV_HALF); 662 } 663 } 664 665 // Horizontal add (doubled) of two 16b values, result is 16b. 666 // in: A | B | C | D | ... -> out: 2*(A+B) | 2*(C+D) | ... 667 static void HorizontalAddPack(const __m128i* const A, const __m128i* const B, 668 __m128i* const out) { 669 const __m128i k2 = _mm_set1_epi16(2); 670 const __m128i C = _mm_madd_epi16(*A, k2); 671 const __m128i D = _mm_madd_epi16(*B, k2); 672 *out = _mm_packs_epi32(C, D); 673 } 674 675 static void ConvertARGBToUV(const uint32_t* argb, uint8_t* u, uint8_t* v, 676 int src_width, int do_store) { 677 const int max_width = src_width & ~31; 678 int i; 679 for (i = 0; i < max_width; i += 32, u += 16, v += 16) { 680 __m128i r0, g0, b0, r1, g1, b1, U0, V0, U1, V1; 681 RGB32PackedToPlanar(&argb[i + 0], &r0, &g0, &b0); 682 RGB32PackedToPlanar(&argb[i + 8], &r1, &g1, &b1); 683 HorizontalAddPack(&r0, &r1, &r0); 684 HorizontalAddPack(&g0, &g1, &g0); 685 HorizontalAddPack(&b0, &b1, &b0); 686 ConvertRGBToUV(&r0, &g0, &b0, &U0, &V0); 687 688 RGB32PackedToPlanar(&argb[i + 16], &r0, &g0, &b0); 689 RGB32PackedToPlanar(&argb[i + 24], &r1, &g1, &b1); 690 HorizontalAddPack(&r0, &r1, &r0); 691 HorizontalAddPack(&g0, &g1, &g0); 692 HorizontalAddPack(&b0, &b1, &b0); 693 ConvertRGBToUV(&r0, &g0, &b0, &U1, &V1); 694 695 U0 = _mm_packus_epi16(U0, U1); 696 V0 = _mm_packus_epi16(V0, V1); 697 if (!do_store) { 698 const __m128i prev_u = LOAD_16(u); 699 const __m128i prev_v = LOAD_16(v); 700 U0 = _mm_avg_epu8(U0, prev_u); 701 V0 = _mm_avg_epu8(V0, prev_v); 702 } 703 STORE_16(U0, u); 704 STORE_16(V0, v); 705 } 706 if (i < src_width) { // left-over 707 WebPConvertARGBToUV_C(argb + i, u, v, src_width - i, do_store); 708 } 709 } 710 711 // Convert 16 packed ARGB 16b-values to r[], g[], b[] 712 static WEBP_INLINE void RGBA32PackedToPlanar_16b(const uint16_t* const rgbx, 713 __m128i* const r, 714 __m128i* const g, 715 __m128i* const b) { 716 const __m128i in0 = LOAD_16(rgbx + 0); // r0 | g0 | b0 |x| r1 | g1 | b1 |x 717 const __m128i in1 = LOAD_16(rgbx + 8); // r2 | g2 | b2 |x| r3 | g3 | b3 |x 718 const __m128i in2 = LOAD_16(rgbx + 16); // r4 | ... 719 const __m128i in3 = LOAD_16(rgbx + 24); // r6 | ... 720 // column-wise transpose 721 const __m128i A0 = _mm_unpacklo_epi16(in0, in1); 722 const __m128i A1 = _mm_unpackhi_epi16(in0, in1); 723 const __m128i A2 = _mm_unpacklo_epi16(in2, in3); 724 const __m128i A3 = _mm_unpackhi_epi16(in2, in3); 725 const __m128i B0 = _mm_unpacklo_epi16(A0, A1); // r0 r1 r2 r3 | g0 g1 .. 726 const __m128i B1 = _mm_unpackhi_epi16(A0, A1); // b0 b1 b2 b3 | x x x x 727 const __m128i B2 = _mm_unpacklo_epi16(A2, A3); // r4 r5 r6 r7 | g4 g5 .. 728 const __m128i B3 = _mm_unpackhi_epi16(A2, A3); // b4 b5 b6 b7 | x x x x 729 *r = _mm_unpacklo_epi64(B0, B2); 730 *g = _mm_unpackhi_epi64(B0, B2); 731 *b = _mm_unpacklo_epi64(B1, B3); 732 } 733 734 static void ConvertRGBA32ToUV(const uint16_t* rgb, 735 uint8_t* u, uint8_t* v, int width) { 736 const int max_width = width & ~15; 737 const uint16_t* const last_rgb = rgb + 4 * max_width; 738 while (rgb < last_rgb) { 739 __m128i r, g, b, U0, V0, U1, V1; 740 RGBA32PackedToPlanar_16b(rgb + 0, &r, &g, &b); 741 ConvertRGBToUV(&r, &g, &b, &U0, &V0); 742 RGBA32PackedToPlanar_16b(rgb + 32, &r, &g, &b); 743 ConvertRGBToUV(&r, &g, &b, &U1, &V1); 744 STORE_16(_mm_packus_epi16(U0, U1), u); 745 STORE_16(_mm_packus_epi16(V0, V1), v); 746 u += 16; 747 v += 16; 748 rgb += 2 * 32; 749 } 750 if (max_width < width) { // left-over 751 WebPConvertRGBA32ToUV_C(rgb, u, v, width - max_width); 752 } 753 } 754 755 //------------------------------------------------------------------------------ 756 757 extern void WebPInitConvertARGBToYUVSSE2(void); 758 759 WEBP_TSAN_IGNORE_FUNCTION void WebPInitConvertARGBToYUVSSE2(void) { 760 WebPConvertARGBToY = ConvertARGBToY; 761 WebPConvertARGBToUV = ConvertARGBToUV; 762 763 WebPConvertRGB24ToY = ConvertRGB24ToY; 764 WebPConvertBGR24ToY = ConvertBGR24ToY; 765 766 WebPConvertRGBA32ToUV = ConvertRGBA32ToUV; 767 } 768 769 #else // !WEBP_USE_SSE2 770 771 WEBP_DSP_INIT_STUB(WebPInitSamplersSSE2) 772 WEBP_DSP_INIT_STUB(WebPInitConvertARGBToYUVSSE2) 773 774 #endif // WEBP_USE_SSE2 775
