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 "src/dsp/yuv.h" 15 16 #if defined(WEBP_USE_SSE41) 17 18 #include "src/dsp/common_sse41.h" 19 #include <stdlib.h> 20 #include <smmintrin.h> 21 22 //----------------------------------------------------------------------------- 23 // Convert spans of 32 pixels to various RGB formats for the fancy upsampler. 24 25 // These constants are 14b fixed-point version of ITU-R BT.601 constants. 26 // R = (19077 * y + 26149 * v - 14234) >> 6 27 // G = (19077 * y - 6419 * u - 13320 * v + 8708) >> 6 28 // B = (19077 * y + 33050 * u - 17685) >> 6 29 static void ConvertYUV444ToRGB_SSE41(const __m128i* const Y0, 30 const __m128i* const U0, 31 const __m128i* const V0, 32 __m128i* const R, 33 __m128i* const G, 34 __m128i* const B) { 35 const __m128i k19077 = _mm_set1_epi16(19077); 36 const __m128i k26149 = _mm_set1_epi16(26149); 37 const __m128i k14234 = _mm_set1_epi16(14234); 38 // 33050 doesn't fit in a signed short: only use this with unsigned arithmetic 39 const __m128i k33050 = _mm_set1_epi16((short)33050); 40 const __m128i k17685 = _mm_set1_epi16(17685); 41 const __m128i k6419 = _mm_set1_epi16(6419); 42 const __m128i k13320 = _mm_set1_epi16(13320); 43 const __m128i k8708 = _mm_set1_epi16(8708); 44 45 const __m128i Y1 = _mm_mulhi_epu16(*Y0, k19077); 46 47 const __m128i R0 = _mm_mulhi_epu16(*V0, k26149); 48 const __m128i R1 = _mm_sub_epi16(Y1, k14234); 49 const __m128i R2 = _mm_add_epi16(R1, R0); 50 51 const __m128i G0 = _mm_mulhi_epu16(*U0, k6419); 52 const __m128i G1 = _mm_mulhi_epu16(*V0, k13320); 53 const __m128i G2 = _mm_add_epi16(Y1, k8708); 54 const __m128i G3 = _mm_add_epi16(G0, G1); 55 const __m128i G4 = _mm_sub_epi16(G2, G3); 56 57 // be careful with the saturated *unsigned* arithmetic here! 58 const __m128i B0 = _mm_mulhi_epu16(*U0, k33050); 59 const __m128i B1 = _mm_adds_epu16(B0, Y1); 60 const __m128i B2 = _mm_subs_epu16(B1, k17685); 61 62 // use logical shift for B2, which can be larger than 32767 63 *R = _mm_srai_epi16(R2, 6); // range: [-14234, 30815] 64 *G = _mm_srai_epi16(G4, 6); // range: [-10953, 27710] 65 *B = _mm_srli_epi16(B2, 6); // range: [0, 34238] 66 } 67 68 // Load the bytes into the *upper* part of 16b words. That's "<< 8", basically. 69 static WEBP_INLINE __m128i Load_HI_16_SSE41(const uint8_t* src) { 70 const __m128i zero = _mm_setzero_si128(); 71 return _mm_unpacklo_epi8(zero, _mm_loadl_epi64((const __m128i*)src)); 72 } 73 74 // Load and replicate the U/V samples 75 static WEBP_INLINE __m128i Load_UV_HI_8_SSE41(const uint8_t* src) { 76 const __m128i zero = _mm_setzero_si128(); 77 const __m128i tmp0 = _mm_cvtsi32_si128(*(const uint32_t*)src); 78 const __m128i tmp1 = _mm_unpacklo_epi8(zero, tmp0); 79 return _mm_unpacklo_epi16(tmp1, tmp1); // replicate samples 80 } 81 82 // Convert 32 samples of YUV444 to R/G/B 83 static void YUV444ToRGB_SSE41(const uint8_t* const y, 84 const uint8_t* const u, 85 const uint8_t* const v, 86 __m128i* const R, __m128i* const G, 87 __m128i* const B) { 88 const __m128i Y0 = Load_HI_16_SSE41(y), U0 = Load_HI_16_SSE41(u), 89 V0 = Load_HI_16_SSE41(v); 90 ConvertYUV444ToRGB_SSE41(&Y0, &U0, &V0, R, G, B); 91 } 92 93 // Convert 32 samples of YUV420 to R/G/B 94 static void YUV420ToRGB_SSE41(const uint8_t* const y, 95 const uint8_t* const u, 96 const uint8_t* const v, 97 __m128i* const R, __m128i* const G, 98 __m128i* const B) { 99 const __m128i Y0 = Load_HI_16_SSE41(y), U0 = Load_UV_HI_8_SSE41(u), 100 V0 = Load_UV_HI_8_SSE41(v); 101 ConvertYUV444ToRGB_SSE41(&Y0, &U0, &V0, R, G, B); 102 } 103 104 // Pack the planar buffers 105 // rrrr... rrrr... gggg... gggg... bbbb... bbbb.... 106 // triplet by triplet in the output buffer rgb as rgbrgbrgbrgb ... 107 static WEBP_INLINE void PlanarTo24b_SSE41( 108 __m128i* const in0, __m128i* const in1, __m128i* const in2, 109 __m128i* const in3, __m128i* const in4, __m128i* const in5, 110 uint8_t* const rgb) { 111 // The input is 6 registers of sixteen 8b but for the sake of explanation, 112 // let's take 6 registers of four 8b values. 113 // To pack, we will keep taking one every two 8b integer and move it 114 // around as follows: 115 // Input: 116 // r0r1r2r3 | r4r5r6r7 | g0g1g2g3 | g4g5g6g7 | b0b1b2b3 | b4b5b6b7 117 // Split the 6 registers in two sets of 3 registers: the first set as the even 118 // 8b bytes, the second the odd ones: 119 // r0r2r4r6 | g0g2g4g6 | b0b2b4b6 | r1r3r5r7 | g1g3g5g7 | b1b3b5b7 120 // Repeat the same permutations twice more: 121 // r0r4g0g4 | b0b4r1r5 | g1g5b1b5 | r2r6g2g6 | b2b6r3r7 | g3g7b3b7 122 // r0g0b0r1 | g1b1r2g2 | b2r3g3b3 | r4g4b4r5 | g5b5r6g6 | b6r7g7b7 123 VP8PlanarTo24b_SSE41(in0, in1, in2, in3, in4, in5); 124 125 _mm_storeu_si128((__m128i*)(rgb + 0), *in0); 126 _mm_storeu_si128((__m128i*)(rgb + 16), *in1); 127 _mm_storeu_si128((__m128i*)(rgb + 32), *in2); 128 _mm_storeu_si128((__m128i*)(rgb + 48), *in3); 129 _mm_storeu_si128((__m128i*)(rgb + 64), *in4); 130 _mm_storeu_si128((__m128i*)(rgb + 80), *in5); 131 } 132 133 void VP8YuvToRgb32_SSE41(const uint8_t* y, const uint8_t* u, const uint8_t* v, 134 uint8_t* dst) { 135 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 136 __m128i rgb0, rgb1, rgb2, rgb3, rgb4, rgb5; 137 138 YUV444ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0); 139 YUV444ToRGB_SSE41(y + 8, u + 8, v + 8, &R1, &G1, &B1); 140 YUV444ToRGB_SSE41(y + 16, u + 16, v + 16, &R2, &G2, &B2); 141 YUV444ToRGB_SSE41(y + 24, u + 24, v + 24, &R3, &G3, &B3); 142 143 // Cast to 8b and store as RRRRGGGGBBBB. 144 rgb0 = _mm_packus_epi16(R0, R1); 145 rgb1 = _mm_packus_epi16(R2, R3); 146 rgb2 = _mm_packus_epi16(G0, G1); 147 rgb3 = _mm_packus_epi16(G2, G3); 148 rgb4 = _mm_packus_epi16(B0, B1); 149 rgb5 = _mm_packus_epi16(B2, B3); 150 151 // Pack as RGBRGBRGBRGB. 152 PlanarTo24b_SSE41(&rgb0, &rgb1, &rgb2, &rgb3, &rgb4, &rgb5, dst); 153 } 154 155 void VP8YuvToBgr32_SSE41(const uint8_t* y, const uint8_t* u, const uint8_t* v, 156 uint8_t* dst) { 157 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 158 __m128i bgr0, bgr1, bgr2, bgr3, bgr4, bgr5; 159 160 YUV444ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0); 161 YUV444ToRGB_SSE41(y + 8, u + 8, v + 8, &R1, &G1, &B1); 162 YUV444ToRGB_SSE41(y + 16, u + 16, v + 16, &R2, &G2, &B2); 163 YUV444ToRGB_SSE41(y + 24, u + 24, v + 24, &R3, &G3, &B3); 164 165 // Cast to 8b and store as BBBBGGGGRRRR. 166 bgr0 = _mm_packus_epi16(B0, B1); 167 bgr1 = _mm_packus_epi16(B2, B3); 168 bgr2 = _mm_packus_epi16(G0, G1); 169 bgr3 = _mm_packus_epi16(G2, G3); 170 bgr4 = _mm_packus_epi16(R0, R1); 171 bgr5= _mm_packus_epi16(R2, R3); 172 173 // Pack as BGRBGRBGRBGR. 174 PlanarTo24b_SSE41(&bgr0, &bgr1, &bgr2, &bgr3, &bgr4, &bgr5, dst); 175 } 176 177 //----------------------------------------------------------------------------- 178 // Arbitrary-length row conversion functions 179 180 static void YuvToRgbRow_SSE41(const uint8_t* y, 181 const uint8_t* u, const uint8_t* v, 182 uint8_t* dst, int len) { 183 int n; 184 for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) { 185 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 186 __m128i rgb0, rgb1, rgb2, rgb3, rgb4, rgb5; 187 188 YUV420ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0); 189 YUV420ToRGB_SSE41(y + 8, u + 4, v + 4, &R1, &G1, &B1); 190 YUV420ToRGB_SSE41(y + 16, u + 8, v + 8, &R2, &G2, &B2); 191 YUV420ToRGB_SSE41(y + 24, u + 12, v + 12, &R3, &G3, &B3); 192 193 // Cast to 8b and store as RRRRGGGGBBBB. 194 rgb0 = _mm_packus_epi16(R0, R1); 195 rgb1 = _mm_packus_epi16(R2, R3); 196 rgb2 = _mm_packus_epi16(G0, G1); 197 rgb3 = _mm_packus_epi16(G2, G3); 198 rgb4 = _mm_packus_epi16(B0, B1); 199 rgb5 = _mm_packus_epi16(B2, B3); 200 201 // Pack as RGBRGBRGBRGB. 202 PlanarTo24b_SSE41(&rgb0, &rgb1, &rgb2, &rgb3, &rgb4, &rgb5, dst); 203 204 y += 32; 205 u += 16; 206 v += 16; 207 } 208 for (; n < len; ++n) { // Finish off 209 VP8YuvToRgb(y[0], u[0], v[0], dst); 210 dst += 3; 211 y += 1; 212 u += (n & 1); 213 v += (n & 1); 214 } 215 } 216 217 static void YuvToBgrRow_SSE41(const uint8_t* y, 218 const uint8_t* u, const uint8_t* v, 219 uint8_t* dst, int len) { 220 int n; 221 for (n = 0; n + 32 <= len; n += 32, dst += 32 * 3) { 222 __m128i R0, R1, R2, R3, G0, G1, G2, G3, B0, B1, B2, B3; 223 __m128i bgr0, bgr1, bgr2, bgr3, bgr4, bgr5; 224 225 YUV420ToRGB_SSE41(y + 0, u + 0, v + 0, &R0, &G0, &B0); 226 YUV420ToRGB_SSE41(y + 8, u + 4, v + 4, &R1, &G1, &B1); 227 YUV420ToRGB_SSE41(y + 16, u + 8, v + 8, &R2, &G2, &B2); 228 YUV420ToRGB_SSE41(y + 24, u + 12, v + 12, &R3, &G3, &B3); 229 230 // Cast to 8b and store as BBBBGGGGRRRR. 231 bgr0 = _mm_packus_epi16(B0, B1); 232 bgr1 = _mm_packus_epi16(B2, B3); 233 bgr2 = _mm_packus_epi16(G0, G1); 234 bgr3 = _mm_packus_epi16(G2, G3); 235 bgr4 = _mm_packus_epi16(R0, R1); 236 bgr5 = _mm_packus_epi16(R2, R3); 237 238 // Pack as BGRBGRBGRBGR. 239 PlanarTo24b_SSE41(&bgr0, &bgr1, &bgr2, &bgr3, &bgr4, &bgr5, dst); 240 241 y += 32; 242 u += 16; 243 v += 16; 244 } 245 for (; n < len; ++n) { // Finish off 246 VP8YuvToBgr(y[0], u[0], v[0], dst); 247 dst += 3; 248 y += 1; 249 u += (n & 1); 250 v += (n & 1); 251 } 252 } 253 254 //------------------------------------------------------------------------------ 255 // Entry point 256 257 extern void WebPInitSamplersSSE41(void); 258 259 WEBP_TSAN_IGNORE_FUNCTION void WebPInitSamplersSSE41(void) { 260 WebPSamplers[MODE_RGB] = YuvToRgbRow_SSE41; 261 WebPSamplers[MODE_BGR] = YuvToBgrRow_SSE41; 262 } 263 264 //------------------------------------------------------------------------------ 265 // RGB24/32 -> YUV converters 266 267 // Load eight 16b-words from *src. 268 #define LOAD_16(src) _mm_loadu_si128((const __m128i*)(src)) 269 // Store either 16b-words into *dst 270 #define STORE_16(V, dst) _mm_storeu_si128((__m128i*)(dst), (V)) 271 272 #define WEBP_SSE41_SHUFF(OUT) do { \ 273 const __m128i tmp0 = _mm_shuffle_epi8(A0, shuff0); \ 274 const __m128i tmp1 = _mm_shuffle_epi8(A1, shuff1); \ 275 const __m128i tmp2 = _mm_shuffle_epi8(A2, shuff2); \ 276 const __m128i tmp3 = _mm_shuffle_epi8(A3, shuff0); \ 277 const __m128i tmp4 = _mm_shuffle_epi8(A4, shuff1); \ 278 const __m128i tmp5 = _mm_shuffle_epi8(A5, shuff2); \ 279 \ 280 /* OR everything to get one channel */ \ 281 const __m128i tmp6 = _mm_or_si128(tmp0, tmp1); \ 282 const __m128i tmp7 = _mm_or_si128(tmp3, tmp4); \ 283 out[OUT + 0] = _mm_or_si128(tmp6, tmp2); \ 284 out[OUT + 1] = _mm_or_si128(tmp7, tmp5); \ 285 } while (0); 286 287 // Unpack the 8b input rgbrgbrgbrgb ... as contiguous registers: 288 // rrrr... rrrr... gggg... gggg... bbbb... bbbb.... 289 // Similar to PlanarTo24bHelper(), but in reverse order. 290 static WEBP_INLINE void RGB24PackedToPlanar_SSE41( 291 const uint8_t* const rgb, __m128i* const out /*out[6]*/) { 292 const __m128i A0 = _mm_loadu_si128((const __m128i*)(rgb + 0)); 293 const __m128i A1 = _mm_loadu_si128((const __m128i*)(rgb + 16)); 294 const __m128i A2 = _mm_loadu_si128((const __m128i*)(rgb + 32)); 295 const __m128i A3 = _mm_loadu_si128((const __m128i*)(rgb + 48)); 296 const __m128i A4 = _mm_loadu_si128((const __m128i*)(rgb + 64)); 297 const __m128i A5 = _mm_loadu_si128((const __m128i*)(rgb + 80)); 298 299 // Compute RR. 300 { 301 const __m128i shuff0 = _mm_set_epi8( 302 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 15, 12, 9, 6, 3, 0); 303 const __m128i shuff1 = _mm_set_epi8( 304 -1, -1, -1, -1, -1, 14, 11, 8, 5, 2, -1, -1, -1, -1, -1, -1); 305 const __m128i shuff2 = _mm_set_epi8( 306 13, 10, 7, 4, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1); 307 WEBP_SSE41_SHUFF(0) 308 } 309 // Compute GG. 310 { 311 const __m128i shuff0 = _mm_set_epi8( 312 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 13, 10, 7, 4, 1); 313 const __m128i shuff1 = _mm_set_epi8( 314 -1, -1, -1, -1, -1, 15, 12, 9, 6, 3, 0, -1, -1, -1, -1, -1); 315 const __m128i shuff2 = _mm_set_epi8( 316 14, 11, 8, 5, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1); 317 WEBP_SSE41_SHUFF(2) 318 } 319 // Compute BB. 320 { 321 const __m128i shuff0 = _mm_set_epi8( 322 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 14, 11, 8, 5, 2); 323 const __m128i shuff1 = _mm_set_epi8( 324 -1, -1, -1, -1, -1, -1, 13, 10, 7, 4, 1, -1, -1, -1, -1, -1); 325 const __m128i shuff2 = _mm_set_epi8( 326 15, 12, 9, 6, 3, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1); 327 WEBP_SSE41_SHUFF(4) 328 } 329 } 330 331 #undef WEBP_SSE41_SHUFF 332 333 // Convert 8 packed ARGB to r[], g[], b[] 334 static WEBP_INLINE void RGB32PackedToPlanar_SSE41( 335 const uint32_t* const argb, __m128i* const rgb /*in[6]*/) { 336 const __m128i zero = _mm_setzero_si128(); 337 __m128i a0 = LOAD_16(argb + 0); 338 __m128i a1 = LOAD_16(argb + 4); 339 __m128i a2 = LOAD_16(argb + 8); 340 __m128i a3 = LOAD_16(argb + 12); 341 VP8L32bToPlanar_SSE41(&a0, &a1, &a2, &a3); 342 rgb[0] = _mm_unpacklo_epi8(a1, zero); 343 rgb[1] = _mm_unpackhi_epi8(a1, zero); 344 rgb[2] = _mm_unpacklo_epi8(a2, zero); 345 rgb[3] = _mm_unpackhi_epi8(a2, zero); 346 rgb[4] = _mm_unpacklo_epi8(a3, zero); 347 rgb[5] = _mm_unpackhi_epi8(a3, zero); 348 } 349 350 // This macro computes (RG * MULT_RG + GB * MULT_GB + ROUNDER) >> DESCALE_FIX 351 // It's a macro and not a function because we need to use immediate values with 352 // srai_epi32, e.g. 353 #define TRANSFORM(RG_LO, RG_HI, GB_LO, GB_HI, MULT_RG, MULT_GB, \ 354 ROUNDER, DESCALE_FIX, OUT) do { \ 355 const __m128i V0_lo = _mm_madd_epi16(RG_LO, MULT_RG); \ 356 const __m128i V0_hi = _mm_madd_epi16(RG_HI, MULT_RG); \ 357 const __m128i V1_lo = _mm_madd_epi16(GB_LO, MULT_GB); \ 358 const __m128i V1_hi = _mm_madd_epi16(GB_HI, MULT_GB); \ 359 const __m128i V2_lo = _mm_add_epi32(V0_lo, V1_lo); \ 360 const __m128i V2_hi = _mm_add_epi32(V0_hi, V1_hi); \ 361 const __m128i V3_lo = _mm_add_epi32(V2_lo, ROUNDER); \ 362 const __m128i V3_hi = _mm_add_epi32(V2_hi, ROUNDER); \ 363 const __m128i V5_lo = _mm_srai_epi32(V3_lo, DESCALE_FIX); \ 364 const __m128i V5_hi = _mm_srai_epi32(V3_hi, DESCALE_FIX); \ 365 (OUT) = _mm_packs_epi32(V5_lo, V5_hi); \ 366 } while (0) 367 368 #define MK_CST_16(A, B) _mm_set_epi16((B), (A), (B), (A), (B), (A), (B), (A)) 369 static WEBP_INLINE void ConvertRGBToY_SSE41(const __m128i* const R, 370 const __m128i* const G, 371 const __m128i* const B, 372 __m128i* const Y) { 373 const __m128i kRG_y = MK_CST_16(16839, 33059 - 16384); 374 const __m128i kGB_y = MK_CST_16(16384, 6420); 375 const __m128i kHALF_Y = _mm_set1_epi32((16 << YUV_FIX) + YUV_HALF); 376 377 const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G); 378 const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G); 379 const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B); 380 const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B); 381 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_y, kGB_y, kHALF_Y, YUV_FIX, *Y); 382 } 383 384 static WEBP_INLINE void ConvertRGBToUV_SSE41(const __m128i* const R, 385 const __m128i* const G, 386 const __m128i* const B, 387 __m128i* const U, 388 __m128i* const V) { 389 const __m128i kRG_u = MK_CST_16(-9719, -19081); 390 const __m128i kGB_u = MK_CST_16(0, 28800); 391 const __m128i kRG_v = MK_CST_16(28800, 0); 392 const __m128i kGB_v = MK_CST_16(-24116, -4684); 393 const __m128i kHALF_UV = _mm_set1_epi32(((128 << YUV_FIX) + YUV_HALF) << 2); 394 395 const __m128i RG_lo = _mm_unpacklo_epi16(*R, *G); 396 const __m128i RG_hi = _mm_unpackhi_epi16(*R, *G); 397 const __m128i GB_lo = _mm_unpacklo_epi16(*G, *B); 398 const __m128i GB_hi = _mm_unpackhi_epi16(*G, *B); 399 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_u, kGB_u, 400 kHALF_UV, YUV_FIX + 2, *U); 401 TRANSFORM(RG_lo, RG_hi, GB_lo, GB_hi, kRG_v, kGB_v, 402 kHALF_UV, YUV_FIX + 2, *V); 403 } 404 405 #undef MK_CST_16 406 #undef TRANSFORM 407 408 static void ConvertRGB24ToY_SSE41(const uint8_t* rgb, uint8_t* y, int width) { 409 const int max_width = width & ~31; 410 int i; 411 for (i = 0; i < max_width; rgb += 3 * 16 * 2) { 412 __m128i rgb_plane[6]; 413 int j; 414 415 RGB24PackedToPlanar_SSE41(rgb, rgb_plane); 416 417 for (j = 0; j < 2; ++j, i += 16) { 418 const __m128i zero = _mm_setzero_si128(); 419 __m128i r, g, b, Y0, Y1; 420 421 // Convert to 16-bit Y. 422 r = _mm_unpacklo_epi8(rgb_plane[0 + j], zero); 423 g = _mm_unpacklo_epi8(rgb_plane[2 + j], zero); 424 b = _mm_unpacklo_epi8(rgb_plane[4 + j], zero); 425 ConvertRGBToY_SSE41(&r, &g, &b, &Y0); 426 427 // Convert to 16-bit Y. 428 r = _mm_unpackhi_epi8(rgb_plane[0 + j], zero); 429 g = _mm_unpackhi_epi8(rgb_plane[2 + j], zero); 430 b = _mm_unpackhi_epi8(rgb_plane[4 + j], zero); 431 ConvertRGBToY_SSE41(&r, &g, &b, &Y1); 432 433 // Cast to 8-bit and store. 434 STORE_16(_mm_packus_epi16(Y0, Y1), y + i); 435 } 436 } 437 for (; i < width; ++i, rgb += 3) { // left-over 438 y[i] = VP8RGBToY(rgb[0], rgb[1], rgb[2], YUV_HALF); 439 } 440 } 441 442 static void ConvertBGR24ToY_SSE41(const uint8_t* bgr, uint8_t* y, int width) { 443 const int max_width = width & ~31; 444 int i; 445 for (i = 0; i < max_width; bgr += 3 * 16 * 2) { 446 __m128i bgr_plane[6]; 447 int j; 448 449 RGB24PackedToPlanar_SSE41(bgr, bgr_plane); 450 451 for (j = 0; j < 2; ++j, i += 16) { 452 const __m128i zero = _mm_setzero_si128(); 453 __m128i r, g, b, Y0, Y1; 454 455 // Convert to 16-bit Y. 456 b = _mm_unpacklo_epi8(bgr_plane[0 + j], zero); 457 g = _mm_unpacklo_epi8(bgr_plane[2 + j], zero); 458 r = _mm_unpacklo_epi8(bgr_plane[4 + j], zero); 459 ConvertRGBToY_SSE41(&r, &g, &b, &Y0); 460 461 // Convert to 16-bit Y. 462 b = _mm_unpackhi_epi8(bgr_plane[0 + j], zero); 463 g = _mm_unpackhi_epi8(bgr_plane[2 + j], zero); 464 r = _mm_unpackhi_epi8(bgr_plane[4 + j], zero); 465 ConvertRGBToY_SSE41(&r, &g, &b, &Y1); 466 467 // Cast to 8-bit and store. 468 STORE_16(_mm_packus_epi16(Y0, Y1), y + i); 469 } 470 } 471 for (; i < width; ++i, bgr += 3) { // left-over 472 y[i] = VP8RGBToY(bgr[2], bgr[1], bgr[0], YUV_HALF); 473 } 474 } 475 476 static void ConvertARGBToY_SSE41(const uint32_t* argb, uint8_t* y, int width) { 477 const int max_width = width & ~15; 478 int i; 479 for (i = 0; i < max_width; i += 16) { 480 __m128i Y0, Y1, rgb[6]; 481 RGB32PackedToPlanar_SSE41(&argb[i], rgb); 482 ConvertRGBToY_SSE41(&rgb[0], &rgb[2], &rgb[4], &Y0); 483 ConvertRGBToY_SSE41(&rgb[1], &rgb[3], &rgb[5], &Y1); 484 STORE_16(_mm_packus_epi16(Y0, Y1), y + i); 485 } 486 for (; i < width; ++i) { // left-over 487 const uint32_t p = argb[i]; 488 y[i] = VP8RGBToY((p >> 16) & 0xff, (p >> 8) & 0xff, (p >> 0) & 0xff, 489 YUV_HALF); 490 } 491 } 492 493 // Horizontal add (doubled) of two 16b values, result is 16b. 494 // in: A | B | C | D | ... -> out: 2*(A+B) | 2*(C+D) | ... 495 static void HorizontalAddPack_SSE41(const __m128i* const A, 496 const __m128i* const B, 497 __m128i* const out) { 498 const __m128i k2 = _mm_set1_epi16(2); 499 const __m128i C = _mm_madd_epi16(*A, k2); 500 const __m128i D = _mm_madd_epi16(*B, k2); 501 *out = _mm_packs_epi32(C, D); 502 } 503 504 static void ConvertARGBToUV_SSE41(const uint32_t* argb, 505 uint8_t* u, uint8_t* v, 506 int src_width, int do_store) { 507 const int max_width = src_width & ~31; 508 int i; 509 for (i = 0; i < max_width; i += 32, u += 16, v += 16) { 510 __m128i rgb[6], U0, V0, U1, V1; 511 RGB32PackedToPlanar_SSE41(&argb[i], rgb); 512 HorizontalAddPack_SSE41(&rgb[0], &rgb[1], &rgb[0]); 513 HorizontalAddPack_SSE41(&rgb[2], &rgb[3], &rgb[2]); 514 HorizontalAddPack_SSE41(&rgb[4], &rgb[5], &rgb[4]); 515 ConvertRGBToUV_SSE41(&rgb[0], &rgb[2], &rgb[4], &U0, &V0); 516 517 RGB32PackedToPlanar_SSE41(&argb[i + 16], rgb); 518 HorizontalAddPack_SSE41(&rgb[0], &rgb[1], &rgb[0]); 519 HorizontalAddPack_SSE41(&rgb[2], &rgb[3], &rgb[2]); 520 HorizontalAddPack_SSE41(&rgb[4], &rgb[5], &rgb[4]); 521 ConvertRGBToUV_SSE41(&rgb[0], &rgb[2], &rgb[4], &U1, &V1); 522 523 U0 = _mm_packus_epi16(U0, U1); 524 V0 = _mm_packus_epi16(V0, V1); 525 if (!do_store) { 526 const __m128i prev_u = LOAD_16(u); 527 const __m128i prev_v = LOAD_16(v); 528 U0 = _mm_avg_epu8(U0, prev_u); 529 V0 = _mm_avg_epu8(V0, prev_v); 530 } 531 STORE_16(U0, u); 532 STORE_16(V0, v); 533 } 534 if (i < src_width) { // left-over 535 WebPConvertARGBToUV_C(argb + i, u, v, src_width - i, do_store); 536 } 537 } 538 539 // Convert 16 packed ARGB 16b-values to r[], g[], b[] 540 static WEBP_INLINE void RGBA32PackedToPlanar_16b_SSE41( 541 const uint16_t* const rgbx, 542 __m128i* const r, __m128i* const g, __m128i* const b) { 543 const __m128i in0 = LOAD_16(rgbx + 0); // r0 | g0 | b0 |x| r1 | g1 | b1 |x 544 const __m128i in1 = LOAD_16(rgbx + 8); // r2 | g2 | b2 |x| r3 | g3 | b3 |x 545 const __m128i in2 = LOAD_16(rgbx + 16); // r4 | ... 546 const __m128i in3 = LOAD_16(rgbx + 24); // r6 | ... 547 // aarrggbb as 16-bit. 548 const __m128i shuff0 = 549 _mm_set_epi8(-1, -1, -1, -1, 13, 12, 5, 4, 11, 10, 3, 2, 9, 8, 1, 0); 550 const __m128i shuff1 = 551 _mm_set_epi8(13, 12, 5, 4, -1, -1, -1, -1, 11, 10, 3, 2, 9, 8, 1, 0); 552 const __m128i A0 = _mm_shuffle_epi8(in0, shuff0); 553 const __m128i A1 = _mm_shuffle_epi8(in1, shuff1); 554 const __m128i A2 = _mm_shuffle_epi8(in2, shuff0); 555 const __m128i A3 = _mm_shuffle_epi8(in3, shuff1); 556 // R0R1G0G1 557 // B0B1**** 558 // R2R3G2G3 559 // B2B3**** 560 // (OR is used to free port 5 for the unpack) 561 const __m128i B0 = _mm_unpacklo_epi32(A0, A1); 562 const __m128i B1 = _mm_or_si128(A0, A1); 563 const __m128i B2 = _mm_unpacklo_epi32(A2, A3); 564 const __m128i B3 = _mm_or_si128(A2, A3); 565 // Gather the channels. 566 *r = _mm_unpacklo_epi64(B0, B2); 567 *g = _mm_unpackhi_epi64(B0, B2); 568 *b = _mm_unpackhi_epi64(B1, B3); 569 } 570 571 static void ConvertRGBA32ToUV_SSE41(const uint16_t* rgb, 572 uint8_t* u, uint8_t* v, int width) { 573 const int max_width = width & ~15; 574 const uint16_t* const last_rgb = rgb + 4 * max_width; 575 while (rgb < last_rgb) { 576 __m128i r, g, b, U0, V0, U1, V1; 577 RGBA32PackedToPlanar_16b_SSE41(rgb + 0, &r, &g, &b); 578 ConvertRGBToUV_SSE41(&r, &g, &b, &U0, &V0); 579 RGBA32PackedToPlanar_16b_SSE41(rgb + 32, &r, &g, &b); 580 ConvertRGBToUV_SSE41(&r, &g, &b, &U1, &V1); 581 STORE_16(_mm_packus_epi16(U0, U1), u); 582 STORE_16(_mm_packus_epi16(V0, V1), v); 583 u += 16; 584 v += 16; 585 rgb += 2 * 32; 586 } 587 if (max_width < width) { // left-over 588 WebPConvertRGBA32ToUV_C(rgb, u, v, width - max_width); 589 } 590 } 591 592 //------------------------------------------------------------------------------ 593 594 extern void WebPInitConvertARGBToYUVSSE41(void); 595 596 WEBP_TSAN_IGNORE_FUNCTION void WebPInitConvertARGBToYUVSSE41(void) { 597 WebPConvertARGBToY = ConvertARGBToY_SSE41; 598 WebPConvertARGBToUV = ConvertARGBToUV_SSE41; 599 600 WebPConvertRGB24ToY = ConvertRGB24ToY_SSE41; 601 WebPConvertBGR24ToY = ConvertBGR24ToY_SSE41; 602 603 WebPConvertRGBA32ToUV = ConvertRGBA32ToUV_SSE41; 604 } 605 606 //------------------------------------------------------------------------------ 607 608 #else // !WEBP_USE_SSE41 609 610 WEBP_DSP_INIT_STUB(WebPInitSamplersSSE41) 611 WEBP_DSP_INIT_STUB(WebPInitConvertARGBToYUVSSE41) 612 613 #endif // WEBP_USE_SSE41 614
