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| 1 // Copyright 2015 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 "cc/resources/texture_compressor_etc1_sse.h" | |
| 6 | |
| 7 #include <emmintrin.h> | |
| 8 | |
| 9 #include "base/compiler_specific.h" | |
| 10 #include "base/logging.h" | |
| 11 // Using this header for common functions such as Color handling | |
| 12 // and codeword table. | |
| 13 #include "cc/resources/texture_compressor_etc1.h" | |
| 14 | |
| 15 namespace cc { | |
| 16 | |
| 17 namespace { | |
| 18 | |
| 19 inline uint32_t SetETC1MaxError(uint32_t avg_error) { | |
| 20 // ETC1 codeword table is sorted in ascending order. | |
| 21 // Our algorithm will try to identify the index that generates the minimum | |
| 22 // error. | |
| 23 // The min error calculated during ComputeLuminance main loop will converge | |
| 24 // towards that value. | |
| 25 // We use this threshold to determine when it doesn't make sense to iterate | |
| 26 // further through the array. | |
| 27 return avg_error + avg_error / 2 + 384; | |
| 28 } | |
| 29 | |
| 30 struct __sse_data { | |
| 31 // This is used to store raw data. | |
| 32 uint8_t* block; | |
| 33 // This is used to store 8 bit packed values. | |
| 34 __m128i* packed; | |
| 35 // This is used to store 32 bit zero extended values into 4x4 arrays. | |
| 36 __m128i* blue; | |
| 37 __m128i* green; | |
| 38 __m128i* red; | |
| 39 }; | |
| 40 | |
| 41 // Commonly used registers throughout the code. | |
| 42 static const __m128i __sse_zero = _mm_set1_epi32(0); | |
| 43 static const __m128i __sse_max_int = _mm_set1_epi32(0x7FFFFFFF); | |
| 44 | |
| 45 inline __m128i AddAndClamp(const __m128i x, const __m128i y) { | |
| 46 static const __m128i color_max = _mm_set1_epi32(0xFF); | |
| 47 return _mm_max_epi16(__sse_zero, | |
| 48 _mm_min_epi16(_mm_add_epi16(x, y), color_max)); | |
| 49 } | |
| 50 | |
| 51 inline __m128i GetColorErrorSSE(const __m128i x, const __m128i y) { | |
| 52 // Changed from _mm_mullo_epi32 (SSE4) to _mm_mullo_epi16 (SSE2). | |
| 53 __m128i ret = _mm_sub_epi16(x, y); | |
| 54 return _mm_mullo_epi16(ret, ret); | |
| 55 } | |
| 56 | |
| 57 inline __m128i AddChannelError(const __m128i x, | |
| 58 const __m128i y, | |
| 59 const __m128i z) { | |
| 60 return _mm_add_epi32(x, _mm_add_epi32(y, z)); | |
| 61 } | |
| 62 | |
| 63 inline uint32_t SumSSE(const __m128i x) { | |
| 64 __m128i sum = _mm_add_epi32(x, _mm_shuffle_epi32(x, 0x4E)); | |
| 65 sum = _mm_add_epi32(sum, _mm_shuffle_epi32(sum, 0xB1)); | |
| 66 | |
| 67 return _mm_cvtsi128_si32(sum); | |
| 68 } | |
| 69 | |
| 70 inline uint32_t GetVerticalError(const __sse_data* data, | |
| 71 const __m128i* blue_avg, | |
| 72 const __m128i* green_avg, | |
| 73 const __m128i* red_avg, | |
| 74 uint32_t* verror) { | |
| 75 __m128i error = __sse_zero; | |
| 76 | |
| 77 for (int i = 0; i < 4; i++) { | |
| 78 error = _mm_add_epi32(error, GetColorErrorSSE(data->blue[i], blue_avg[0])); | |
| 79 error = | |
| 80 _mm_add_epi32(error, GetColorErrorSSE(data->green[i], green_avg[0])); | |
| 81 error = _mm_add_epi32(error, GetColorErrorSSE(data->red[i], red_avg[0])); | |
| 82 } | |
| 83 | |
| 84 error = _mm_add_epi32(error, _mm_shuffle_epi32(error, 0x4E)); | |
| 85 | |
| 86 verror[0] = _mm_cvtsi128_si32(error); | |
| 87 verror[1] = _mm_cvtsi128_si32(_mm_shuffle_epi32(error, 0xB1)); | |
| 88 | |
| 89 return verror[0] + verror[1]; | |
| 90 } | |
| 91 | |
| 92 inline uint32_t GetHorizontalError(const __sse_data* data, | |
| 93 const __m128i* blue_avg, | |
| 94 const __m128i* green_avg, | |
| 95 const __m128i* red_avg, | |
| 96 uint32_t* verror) { | |
| 97 __m128i error = __sse_zero; | |
| 98 int first_index, second_index; | |
| 99 | |
| 100 for (int i = 0; i < 2; i++) { | |
| 101 first_index = 2 * i; | |
| 102 second_index = first_index + 1; | |
| 103 | |
| 104 error = _mm_add_epi32( | |
| 105 error, GetColorErrorSSE(data->blue[first_index], blue_avg[i])); | |
| 106 error = _mm_add_epi32( | |
| 107 error, GetColorErrorSSE(data->blue[second_index], blue_avg[i])); | |
| 108 error = _mm_add_epi32( | |
| 109 error, GetColorErrorSSE(data->green[first_index], green_avg[i])); | |
| 110 error = _mm_add_epi32( | |
| 111 error, GetColorErrorSSE(data->green[second_index], green_avg[i])); | |
| 112 error = _mm_add_epi32(error, | |
| 113 GetColorErrorSSE(data->red[first_index], red_avg[i])); | |
| 114 error = _mm_add_epi32( | |
| 115 error, GetColorErrorSSE(data->red[second_index], red_avg[i])); | |
| 116 } | |
| 117 | |
| 118 error = _mm_add_epi32(error, _mm_shuffle_epi32(error, 0x4E)); | |
| 119 | |
| 120 verror[0] = _mm_cvtsi128_si32(error); | |
| 121 verror[1] = _mm_cvtsi128_si32(_mm_shuffle_epi32(error, 0xB1)); | |
| 122 | |
| 123 return verror[0] + verror[1]; | |
| 124 } | |
| 125 | |
| 126 inline void GetAvgColors(const __sse_data* data, | |
| 127 float* output, | |
| 128 bool* __sse_use_diff) { | |
| 129 __m128i sum[2], tmp; | |
| 130 | |
| 131 // TODO(radu.velea): _mm_avg_epu8 on packed data maybe. | |
| 132 | |
| 133 // Compute avg red value. | |
| 134 // [S0 S0 S1 S1] | |
| 135 sum[0] = _mm_add_epi32(data->red[0], data->red[1]); | |
| 136 sum[0] = _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0xB1)); | |
| 137 | |
| 138 // [S2 S2 S3 S3] | |
| 139 sum[1] = _mm_add_epi32(data->red[2], data->red[3]); | |
| 140 sum[1] = _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0xB1)); | |
| 141 | |
| 142 float hred[2], vred[2]; | |
| 143 hred[0] = (_mm_cvtsi128_si32( | |
| 144 _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0x4E)))) / | |
| 145 8.0f; | |
| 146 hred[1] = (_mm_cvtsi128_si32( | |
| 147 _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0x4E)))) / | |
| 148 8.0f; | |
| 149 | |
| 150 tmp = _mm_add_epi32(sum[0], sum[1]); | |
| 151 vred[0] = (_mm_cvtsi128_si32(tmp)) / 8.0f; | |
| 152 vred[1] = (_mm_cvtsi128_si32(_mm_shuffle_epi32(tmp, 0x2))) / 8.0f; | |
| 153 | |
| 154 // Compute avg green value. | |
| 155 // [S0 S0 S1 S1] | |
| 156 sum[0] = _mm_add_epi32(data->green[0], data->green[1]); | |
| 157 sum[0] = _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0xB1)); | |
| 158 | |
| 159 // [S2 S2 S3 S3] | |
| 160 sum[1] = _mm_add_epi32(data->green[2], data->green[3]); | |
| 161 sum[1] = _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0xB1)); | |
| 162 | |
| 163 float hgreen[2], vgreen[2]; | |
| 164 hgreen[0] = (_mm_cvtsi128_si32( | |
| 165 _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0x4E)))) / | |
| 166 8.0f; | |
| 167 hgreen[1] = (_mm_cvtsi128_si32( | |
| 168 _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0x4E)))) / | |
| 169 8.0f; | |
| 170 | |
| 171 tmp = _mm_add_epi32(sum[0], sum[1]); | |
| 172 vgreen[0] = (_mm_cvtsi128_si32(tmp)) / 8.0f; | |
| 173 vgreen[1] = (_mm_cvtsi128_si32(_mm_shuffle_epi32(tmp, 0x2))) / 8.0f; | |
| 174 | |
| 175 // Compute avg blue value. | |
| 176 // [S0 S0 S1 S1] | |
| 177 sum[0] = _mm_add_epi32(data->blue[0], data->blue[1]); | |
| 178 sum[0] = _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0xB1)); | |
| 179 | |
| 180 // [S2 S2 S3 S3] | |
| 181 sum[1] = _mm_add_epi32(data->blue[2], data->blue[3]); | |
| 182 sum[1] = _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0xB1)); | |
| 183 | |
| 184 float hblue[2], vblue[2]; | |
| 185 hblue[0] = (_mm_cvtsi128_si32( | |
| 186 _mm_add_epi32(sum[0], _mm_shuffle_epi32(sum[0], 0x4E)))) / | |
| 187 8.0f; | |
| 188 hblue[1] = (_mm_cvtsi128_si32( | |
| 189 _mm_add_epi32(sum[1], _mm_shuffle_epi32(sum[1], 0x4E)))) / | |
| 190 8.0f; | |
| 191 | |
| 192 tmp = _mm_add_epi32(sum[0], sum[1]); | |
| 193 vblue[0] = (_mm_cvtsi128_si32(tmp)) / 8.0f; | |
| 194 vblue[1] = (_mm_cvtsi128_si32(_mm_shuffle_epi32(tmp, 0x2))) / 8.0f; | |
| 195 | |
| 196 // TODO(radu.velea): Return int's instead of floats, based on Quality. | |
| 197 output[0] = vblue[0]; | |
| 198 output[1] = vgreen[0]; | |
| 199 output[2] = vred[0]; | |
| 200 | |
| 201 output[3] = vblue[1]; | |
| 202 output[4] = vgreen[1]; | |
| 203 output[5] = vred[1]; | |
| 204 | |
| 205 output[6] = hblue[0]; | |
| 206 output[7] = hgreen[0]; | |
| 207 output[8] = hred[0]; | |
| 208 | |
| 209 output[9] = hblue[1]; | |
| 210 output[10] = hgreen[1]; | |
| 211 output[11] = hred[1]; | |
| 212 | |
| 213 __m128i threshold_upper = _mm_set1_epi32(3); | |
| 214 __m128i threshold_lower = _mm_set1_epi32(-4); | |
| 215 | |
| 216 __m128 factor_v = _mm_set1_ps(31.0f / 255.0f); | |
| 217 __m128 rounding_v = _mm_set1_ps(0.5f); | |
| 218 __m128 h_avg_0 = _mm_set_ps(hblue[0], hgreen[0], hred[0], 0); | |
| 219 __m128 h_avg_1 = _mm_set_ps(hblue[1], hgreen[1], hred[1], 0); | |
| 220 | |
| 221 __m128 v_avg_0 = _mm_set_ps(vblue[0], vgreen[0], vred[0], 0); | |
| 222 __m128 v_avg_1 = _mm_set_ps(vblue[1], vgreen[1], vred[1], 0); | |
| 223 | |
| 224 h_avg_0 = _mm_mul_ps(h_avg_0, factor_v); | |
| 225 h_avg_1 = _mm_mul_ps(h_avg_1, factor_v); | |
| 226 v_avg_0 = _mm_mul_ps(v_avg_0, factor_v); | |
| 227 v_avg_1 = _mm_mul_ps(v_avg_1, factor_v); | |
| 228 | |
| 229 h_avg_0 = _mm_add_ps(h_avg_0, rounding_v); | |
| 230 h_avg_1 = _mm_add_ps(h_avg_1, rounding_v); | |
| 231 v_avg_0 = _mm_add_ps(v_avg_0, rounding_v); | |
| 232 v_avg_1 = _mm_add_ps(v_avg_1, rounding_v); | |
| 233 | |
| 234 __m128i h_avg_0i = _mm_cvttps_epi32(h_avg_0); | |
| 235 __m128i h_avg_1i = _mm_cvttps_epi32(h_avg_1); | |
| 236 | |
| 237 __m128i v_avg_0i = _mm_cvttps_epi32(v_avg_0); | |
| 238 __m128i v_avg_1i = _mm_cvttps_epi32(v_avg_1); | |
| 239 | |
| 240 h_avg_0i = _mm_sub_epi32(h_avg_1i, h_avg_0i); | |
| 241 v_avg_0i = _mm_sub_epi32(v_avg_1i, v_avg_0i); | |
| 242 | |
| 243 __sse_use_diff[0] = | |
| 244 (0 == _mm_movemask_epi8(_mm_cmplt_epi32(v_avg_0i, threshold_lower))); | |
| 245 __sse_use_diff[0] &= | |
| 246 (0 == _mm_movemask_epi8(_mm_cmpgt_epi32(v_avg_0i, threshold_upper))); | |
| 247 | |
| 248 __sse_use_diff[1] = | |
| 249 (0 == _mm_movemask_epi8(_mm_cmplt_epi32(h_avg_0i, threshold_lower))); | |
| 250 __sse_use_diff[1] &= | |
| 251 (0 == _mm_movemask_epi8(_mm_cmpgt_epi32(h_avg_0i, threshold_upper))); | |
| 252 } | |
| 253 | |
| 254 void ComputeLuminance(uint8_t* block, | |
| 255 const Color& base, | |
| 256 const int sub_block_id, | |
| 257 const uint8_t* idx_to_num_tab, | |
| 258 const __sse_data* data, | |
| 259 const uint32_t expected_error) { | |
| 260 uint8_t best_tbl_idx = 0; | |
| 261 uint32_t best_error = 0x7FFFFFFF; | |
| 262 uint8_t best_mod_idx[8][8]; // [table][texel] | |
| 263 | |
| 264 const __m128i base_blue = _mm_set1_epi32(base.channels.b); | |
| 265 const __m128i base_green = _mm_set1_epi32(base.channels.g); | |
| 266 const __m128i base_red = _mm_set1_epi32(base.channels.r); | |
| 267 | |
| 268 __m128i test_red, test_blue, test_green, tmp, tmp_blue, tmp_green, tmp_red; | |
| 269 __m128i block_error, mask; | |
| 270 | |
| 271 // This will have the minimum errors for each 4 pixels. | |
| 272 __m128i first_half_min; | |
| 273 __m128i second_half_min; | |
| 274 | |
| 275 // This will have the matching table index combo for each 4 pixels. | |
| 276 __m128i first_half_pattern; | |
| 277 __m128i second_half_pattern; | |
| 278 | |
| 279 const __m128i first_blue_data_block = data->blue[2 * sub_block_id]; | |
| 280 const __m128i first_green_data_block = data->green[2 * sub_block_id]; | |
| 281 const __m128i first_red_data_block = data->red[2 * sub_block_id]; | |
| 282 | |
| 283 const __m128i second_blue_data_block = data->blue[2 * sub_block_id + 1]; | |
| 284 const __m128i second_green_data_block = data->green[2 * sub_block_id + 1]; | |
| 285 const __m128i second_red_data_block = data->red[2 * sub_block_id + 1]; | |
| 286 | |
| 287 uint32_t min; | |
| 288 // Fail early to increase speed. | |
| 289 long delta = INT32_MAX; | |
| 290 uint32_t last_min = INT32_MAX; | |
| 291 | |
| 292 const uint8_t shuffle_mask[] = { | |
| 293 0x1B, 0x4E, 0xB1, 0xE4}; // Important they are sorted ascending. | |
| 294 | |
| 295 for (unsigned int tbl_idx = 0; tbl_idx < 8; ++tbl_idx) { | |
| 296 tmp = _mm_set_epi32( | |
| 297 g_codeword_tables[tbl_idx][3], g_codeword_tables[tbl_idx][2], | |
| 298 g_codeword_tables[tbl_idx][1], g_codeword_tables[tbl_idx][0]); | |
| 299 | |
| 300 test_blue = AddAndClamp(tmp, base_blue); | |
| 301 test_green = AddAndClamp(tmp, base_green); | |
| 302 test_red = AddAndClamp(tmp, base_red); | |
| 303 | |
| 304 first_half_min = __sse_max_int; | |
| 305 second_half_min = __sse_max_int; | |
| 306 | |
| 307 first_half_pattern = __sse_zero; | |
| 308 second_half_pattern = __sse_zero; | |
| 309 | |
| 310 for (uint8_t imm8 : shuffle_mask) { | |
| 311 switch (imm8) { | |
| 312 case 0x1B: | |
| 313 tmp_blue = _mm_shuffle_epi32(test_blue, 0x1B); | |
| 314 tmp_green = _mm_shuffle_epi32(test_green, 0x1B); | |
| 315 tmp_red = _mm_shuffle_epi32(test_red, 0x1B); | |
| 316 break; | |
| 317 case 0x4E: | |
| 318 tmp_blue = _mm_shuffle_epi32(test_blue, 0x4E); | |
| 319 tmp_green = _mm_shuffle_epi32(test_green, 0x4E); | |
| 320 tmp_red = _mm_shuffle_epi32(test_red, 0x4E); | |
| 321 break; | |
| 322 case 0xB1: | |
| 323 tmp_blue = _mm_shuffle_epi32(test_blue, 0xB1); | |
| 324 tmp_green = _mm_shuffle_epi32(test_green, 0xB1); | |
| 325 tmp_red = _mm_shuffle_epi32(test_red, 0xB1); | |
| 326 break; | |
| 327 case 0xE4: | |
| 328 tmp_blue = _mm_shuffle_epi32(test_blue, 0xE4); | |
| 329 tmp_green = _mm_shuffle_epi32(test_green, 0xE4); | |
| 330 tmp_red = _mm_shuffle_epi32(test_red, 0xE4); | |
| 331 break; | |
| 332 default: | |
| 333 tmp_blue = test_blue; | |
| 334 tmp_green = test_green; | |
| 335 tmp_red = test_red; | |
| 336 } | |
| 337 | |
| 338 tmp = _mm_set1_epi32(imm8); | |
| 339 | |
| 340 block_error = | |
| 341 AddChannelError(GetColorErrorSSE(tmp_blue, first_blue_data_block), | |
| 342 GetColorErrorSSE(tmp_green, first_green_data_block), | |
| 343 GetColorErrorSSE(tmp_red, first_red_data_block)); | |
| 344 | |
| 345 // Save winning pattern. | |
| 346 first_half_pattern = _mm_max_epi16( | |
| 347 first_half_pattern, | |
| 348 _mm_and_si128(tmp, _mm_cmpgt_epi32(first_half_min, block_error))); | |
| 349 // Should use _mm_min_epi32(first_half_min, block_error); from SSE4 | |
| 350 // otherwise we have a small performance penalty. | |
| 351 mask = _mm_cmplt_epi32(block_error, first_half_min); | |
| 352 first_half_min = _mm_add_epi32(_mm_and_si128(mask, block_error), | |
| 353 _mm_andnot_si128(mask, first_half_min)); | |
| 354 | |
| 355 // Compute second part of the block. | |
| 356 block_error = | |
| 357 AddChannelError(GetColorErrorSSE(tmp_blue, second_blue_data_block), | |
| 358 GetColorErrorSSE(tmp_green, second_green_data_block), | |
| 359 GetColorErrorSSE(tmp_red, second_red_data_block)); | |
| 360 | |
| 361 // Save winning pattern. | |
| 362 second_half_pattern = _mm_max_epi16( | |
| 363 second_half_pattern, | |
| 364 _mm_and_si128(tmp, _mm_cmpgt_epi32(second_half_min, block_error))); | |
| 365 // Should use _mm_min_epi32(second_half_min, block_error); from SSE4 | |
| 366 // otherwise we have a small performance penalty. | |
| 367 mask = _mm_cmplt_epi32(block_error, second_half_min); | |
| 368 second_half_min = _mm_add_epi32(_mm_and_si128(mask, block_error), | |
| 369 _mm_andnot_si128(mask, second_half_min)); | |
| 370 } | |
| 371 | |
| 372 first_half_min = _mm_add_epi32(first_half_min, second_half_min); | |
| 373 first_half_min = | |
| 374 _mm_add_epi32(first_half_min, _mm_shuffle_epi32(first_half_min, 0x4E)); | |
| 375 first_half_min = | |
| 376 _mm_add_epi32(first_half_min, _mm_shuffle_epi32(first_half_min, 0xB1)); | |
| 377 | |
| 378 min = _mm_cvtsi128_si32(first_half_min); | |
| 379 | |
| 380 delta = min - last_min; | |
| 381 last_min = min; | |
| 382 | |
| 383 if (min < best_error) { | |
| 384 best_tbl_idx = tbl_idx; | |
| 385 best_error = min; | |
| 386 | |
| 387 best_mod_idx[tbl_idx][0] = | |
| 388 (_mm_cvtsi128_si32(first_half_pattern) >> (0)) & 3; | |
| 389 best_mod_idx[tbl_idx][4] = | |
| 390 (_mm_cvtsi128_si32(second_half_pattern) >> (0)) & 3; | |
| 391 | |
| 392 best_mod_idx[tbl_idx][1] = | |
| 393 (_mm_cvtsi128_si32(_mm_shuffle_epi32(first_half_pattern, 0x1)) >> | |
| 394 (2)) & | |
| 395 3; | |
| 396 best_mod_idx[tbl_idx][5] = | |
| 397 (_mm_cvtsi128_si32(_mm_shuffle_epi32(second_half_pattern, 0x1)) >> | |
| 398 (2)) & | |
| 399 3; | |
| 400 | |
| 401 best_mod_idx[tbl_idx][2] = | |
| 402 (_mm_cvtsi128_si32(_mm_shuffle_epi32(first_half_pattern, 0x2)) >> | |
| 403 (4)) & | |
| 404 3; | |
| 405 best_mod_idx[tbl_idx][6] = | |
| 406 (_mm_cvtsi128_si32(_mm_shuffle_epi32(second_half_pattern, 0x2)) >> | |
| 407 (4)) & | |
| 408 3; | |
| 409 | |
| 410 best_mod_idx[tbl_idx][3] = | |
| 411 (_mm_cvtsi128_si32(_mm_shuffle_epi32(first_half_pattern, 0x3)) >> | |
| 412 (6)) & | |
| 413 3; | |
| 414 best_mod_idx[tbl_idx][7] = | |
| 415 (_mm_cvtsi128_si32(_mm_shuffle_epi32(second_half_pattern, 0x3)) >> | |
| 416 (6)) & | |
| 417 3; | |
| 418 | |
| 419 if (best_error == 0) { | |
| 420 break; | |
| 421 } | |
| 422 } else if (delta > 0 && expected_error < min) { | |
| 423 // The error is growing and is well beyond expected threshold. | |
| 424 break; | |
| 425 } | |
| 426 } | |
| 427 | |
| 428 WriteCodewordTable(block, sub_block_id, best_tbl_idx); | |
| 429 | |
| 430 uint32_t pix_data = 0; | |
| 431 uint8_t mod_idx; | |
| 432 uint8_t pix_idx; | |
| 433 uint32_t lsb; | |
| 434 uint32_t msb; | |
| 435 int texel_num; | |
| 436 | |
| 437 for (unsigned int i = 0; i < 8; ++i) { | |
| 438 mod_idx = best_mod_idx[best_tbl_idx][i]; | |
| 439 pix_idx = g_mod_to_pix[mod_idx]; | |
| 440 | |
| 441 lsb = pix_idx & 0x1; | |
| 442 msb = pix_idx >> 1; | |
| 443 | |
| 444 // Obtain the texel number as specified in the standard. | |
| 445 texel_num = idx_to_num_tab[i]; | |
| 446 pix_data |= msb << (texel_num + 16); | |
| 447 pix_data |= lsb << (texel_num); | |
| 448 } | |
| 449 | |
| 450 WritePixelData(block, pix_data); | |
| 451 } | |
| 452 | |
| 453 void CompressBlock(uint8_t* dst, __sse_data* data) { | |
| 454 // First 3 values are for vertical 1, second 3 vertical 2, third 3 horizontal | |
| 455 // 1, last 3 | |
| 456 // horizontal 2. | |
| 457 float __sse_avg_colors[12] = { | |
| 458 0, | |
| 459 }; | |
| 460 bool use_differential[2] = {true, true}; | |
| 461 GetAvgColors(data, __sse_avg_colors, use_differential); | |
| 462 Color sub_block_avg[4]; | |
| 463 | |
| 464 // TODO(radu.velea): Remove floating point operations and use only int's + | |
| 465 // normal rounding and shifts for reduced Quality. | |
| 466 for (int i = 0, j = 1; i < 4; i += 2, j += 2) { | |
| 467 if (use_differential[i / 2] == false) { | |
| 468 sub_block_avg[i] = MakeColor444(&__sse_avg_colors[i * 3]); | |
| 469 sub_block_avg[j] = MakeColor444(&__sse_avg_colors[j * 3]); | |
| 470 } else { | |
| 471 sub_block_avg[i] = MakeColor555(&__sse_avg_colors[i * 3]); | |
| 472 sub_block_avg[j] = MakeColor555(&__sse_avg_colors[j * 3]); | |
| 473 } | |
| 474 } | |
| 475 | |
| 476 __m128i red_avg[2], green_avg[2], blue_avg[2]; | |
| 477 | |
| 478 // TODO(radu.velea): Perfect accuracy, maybe skip floating variables. | |
| 479 blue_avg[0] = _mm_set_epi32(static_cast<int>(__sse_avg_colors[3]), | |
| 480 static_cast<int>(__sse_avg_colors[3]), | |
| 481 static_cast<int>(__sse_avg_colors[0]), | |
| 482 static_cast<int>(__sse_avg_colors[0])); | |
| 483 | |
| 484 green_avg[0] = _mm_set_epi32(static_cast<int>(__sse_avg_colors[4]), | |
| 485 static_cast<int>(__sse_avg_colors[4]), | |
| 486 static_cast<int>(__sse_avg_colors[1]), | |
| 487 static_cast<int>(__sse_avg_colors[1])); | |
| 488 | |
| 489 red_avg[0] = _mm_set_epi32(static_cast<int>(__sse_avg_colors[5]), | |
| 490 static_cast<int>(__sse_avg_colors[5]), | |
| 491 static_cast<int>(__sse_avg_colors[2]), | |
| 492 static_cast<int>(__sse_avg_colors[2])); | |
| 493 | |
| 494 uint32_t vertical_error[2]; | |
| 495 GetVerticalError(data, blue_avg, green_avg, red_avg, vertical_error); | |
| 496 | |
| 497 // TODO(radu.velea): Perfect accuracy, maybe skip floating variables. | |
| 498 blue_avg[0] = _mm_set1_epi32(static_cast<int>(__sse_avg_colors[6])); | |
| 499 blue_avg[1] = _mm_set1_epi32(static_cast<int>(__sse_avg_colors[9])); | |
| 500 | |
| 501 green_avg[0] = _mm_set1_epi32(static_cast<int>(__sse_avg_colors[7])); | |
| 502 green_avg[1] = _mm_set1_epi32(static_cast<int>(__sse_avg_colors[10])); | |
| 503 | |
| 504 red_avg[0] = _mm_set1_epi32(static_cast<int>(__sse_avg_colors[8])); | |
| 505 red_avg[1] = _mm_set1_epi32(static_cast<int>(__sse_avg_colors[11])); | |
| 506 | |
| 507 uint32_t horizontal_error[2]; | |
| 508 GetHorizontalError(data, blue_avg, green_avg, red_avg, horizontal_error); | |
| 509 | |
| 510 bool flip = (horizontal_error[0] + horizontal_error[1]) < | |
| 511 (vertical_error[0] + vertical_error[1]); | |
| 512 uint32_t* expected_errors = flip ? horizontal_error : vertical_error; | |
| 513 | |
| 514 // Clear destination buffer so that we can "or" in the results. | |
| 515 memset(dst, 0, 8); | |
| 516 | |
| 517 WriteDiff(dst, use_differential[!!flip]); | |
| 518 WriteFlip(dst, flip); | |
| 519 | |
| 520 uint8_t sub_block_off_0 = flip ? 2 : 0; | |
| 521 uint8_t sub_block_off_1 = sub_block_off_0 + 1; | |
| 522 | |
| 523 if (use_differential[!!flip]) { | |
| 524 WriteColors555(dst, sub_block_avg[sub_block_off_0], | |
| 525 sub_block_avg[sub_block_off_1]); | |
| 526 } else { | |
| 527 WriteColors444(dst, sub_block_avg[sub_block_off_0], | |
| 528 sub_block_avg[sub_block_off_1]); | |
| 529 } | |
| 530 | |
| 531 if (!flip) { | |
| 532 // Transpose vertical data into horizontal lines. | |
| 533 __m128i tmp; | |
| 534 for (int i = 0; i < 4; i += 2) { | |
| 535 tmp = data->blue[i]; | |
| 536 data->blue[i] = _mm_add_epi32( | |
| 537 _mm_move_epi64(data->blue[i]), | |
| 538 _mm_shuffle_epi32(_mm_move_epi64(data->blue[i + 1]), 0x4E)); | |
| 539 data->blue[i + 1] = _mm_add_epi32( | |
| 540 _mm_move_epi64(_mm_shuffle_epi32(tmp, 0x4E)), | |
| 541 _mm_shuffle_epi32( | |
| 542 _mm_move_epi64(_mm_shuffle_epi32(data->blue[i + 1], 0x4E)), | |
| 543 0x4E)); | |
| 544 | |
| 545 tmp = data->green[i]; | |
| 546 data->green[i] = _mm_add_epi32( | |
| 547 _mm_move_epi64(data->green[i]), | |
| 548 _mm_shuffle_epi32(_mm_move_epi64(data->green[i + 1]), 0x4E)); | |
| 549 data->green[i + 1] = _mm_add_epi32( | |
| 550 _mm_move_epi64(_mm_shuffle_epi32(tmp, 0x4E)), | |
| 551 _mm_shuffle_epi32( | |
| 552 _mm_move_epi64(_mm_shuffle_epi32(data->green[i + 1], 0x4E)), | |
| 553 0x4E)); | |
| 554 | |
| 555 tmp = data->red[i]; | |
| 556 data->red[i] = _mm_add_epi32( | |
| 557 _mm_move_epi64(data->red[i]), | |
| 558 _mm_shuffle_epi32(_mm_move_epi64(data->red[i + 1]), 0x4E)); | |
| 559 data->red[i + 1] = _mm_add_epi32( | |
| 560 _mm_move_epi64(_mm_shuffle_epi32(tmp, 0x4E)), | |
| 561 _mm_shuffle_epi32( | |
| 562 _mm_move_epi64(_mm_shuffle_epi32(data->red[i + 1], 0x4E)), 0x4E)); | |
| 563 } | |
| 564 | |
| 565 tmp = data->blue[1]; | |
| 566 data->blue[1] = data->blue[2]; | |
| 567 data->blue[2] = tmp; | |
| 568 | |
| 569 tmp = data->green[1]; | |
| 570 data->green[1] = data->green[2]; | |
| 571 data->green[2] = tmp; | |
| 572 | |
| 573 tmp = data->red[1]; | |
| 574 data->red[1] = data->red[2]; | |
| 575 data->red[2] = tmp; | |
| 576 } | |
| 577 | |
| 578 // Compute luminance for the first sub block. | |
| 579 ComputeLuminance(dst, sub_block_avg[sub_block_off_0], 0, | |
| 580 g_idx_to_num[sub_block_off_0], data, | |
| 581 SetETC1MaxError(expected_errors[0])); | |
| 582 // Compute luminance for the second sub block. | |
| 583 ComputeLuminance(dst, sub_block_avg[sub_block_off_1], 1, | |
| 584 g_idx_to_num[sub_block_off_1], data, | |
| 585 SetETC1MaxError(expected_errors[1])); | |
| 586 } | |
| 587 | |
| 588 static void ExtractBlock(uint8_t* dst, const uint8_t* src, int width) { | |
| 589 for (int j = 0; j < 4; ++j) { | |
| 590 memcpy(&dst[j * 4 * 4], src, 4 * 4); | |
| 591 src += width * 4; | |
| 592 } | |
| 593 } | |
| 594 | |
| 595 inline bool TransposeBlock(uint8_t* block, __m128i* transposed) { | |
| 596 // This function transforms an incommig block of RGBA or GBRA pixels into 4 | |
| 597 // registers, each containing the data corresponding for a single channel. | |
| 598 // Ex: transposed[0] will have all the R values for a RGBA block, | |
| 599 // transposed[1] will have G, etc. | |
| 600 // The values are packed as 8 bit unsigned values in the SSE registers. | |
| 601 | |
| 602 // Before doing any work we check if the block is solid. | |
| 603 __m128i tmp3, tmp2, tmp1, tmp0; | |
| 604 __m128i test_solid = _mm_set1_epi32(*((uint32_t*)block)); | |
| 605 uint16_t mask = 0xFFFF; | |
| 606 | |
| 607 // a0,a1,a2,...a7, ...a15 | |
| 608 transposed[0] = _mm_loadu_si128((__m128i*)(block)); | |
| 609 // b0, b1,b2,...b7.... b15 | |
| 610 transposed[1] = _mm_loadu_si128((__m128i*)(block + 16)); | |
| 611 // c0, c1,c2,...c7....c15 | |
| 612 transposed[2] = _mm_loadu_si128((__m128i*)(block + 32)); | |
| 613 // d0,d1,d2,...d7....d15 | |
| 614 transposed[3] = _mm_loadu_si128((__m128i*)(block + 48)); | |
| 615 | |
| 616 for (int i = 0; i < 4; i++) { | |
| 617 mask &= _mm_movemask_epi8(_mm_cmpeq_epi8(transposed[i], test_solid)); | |
| 618 } | |
| 619 | |
| 620 if (mask == 0xFFFF) { | |
| 621 // Block is solid, no need to do any more work. | |
| 622 return false; | |
| 623 } | |
| 624 | |
| 625 // a0,b0, a1,b1, a2,b2, a3,b3,....a7,b7 | |
| 626 tmp0 = _mm_unpacklo_epi8(transposed[0], transposed[1]); | |
| 627 // c0,d0, c1,d1, c2,d2, c3,d3,... c7,d7 | |
| 628 tmp1 = _mm_unpacklo_epi8(transposed[2], transposed[3]); | |
| 629 // a8,b8, a9,b9, a10,b10, a11,b11,...a15,b15 | |
| 630 tmp2 = _mm_unpackhi_epi8(transposed[0], transposed[1]); | |
| 631 // c8,d8, c9,d9, c10,d10, c11,d11,...c15,d15 | |
| 632 tmp3 = _mm_unpackhi_epi8(transposed[2], transposed[3]); | |
| 633 | |
| 634 // a0,a8, b0,b8, a1,a9, b1,b9, ....a3,a11, b3,b11 | |
| 635 transposed[0] = _mm_unpacklo_epi8(tmp0, tmp2); | |
| 636 // a4,a12, b4,b12, a5,a13, b5,b13,....a7,a15,b7,b15 | |
| 637 transposed[1] = _mm_unpackhi_epi8(tmp0, tmp2); | |
| 638 // c0,c8, d0,d8, c1,c9, d1,d9.....d3,d11 | |
| 639 transposed[2] = _mm_unpacklo_epi8(tmp1, tmp3); | |
| 640 // c4,c12,d4,d12, c5,c13, d5,d13,....d7,d15 | |
| 641 transposed[3] = _mm_unpackhi_epi8(tmp1, tmp3); | |
| 642 | |
| 643 // a0,a8, b0,b8, c0,c8, d0,d8, a1,a9, b1,b9, c1,c9, d1,d9 | |
| 644 tmp0 = _mm_unpacklo_epi32(transposed[0], transposed[2]); | |
| 645 // a2,a10, b2,b10, c2,c10, d2,d10, a3,a11, b3,b11, c3,c11, d3,d11 | |
| 646 tmp1 = _mm_unpackhi_epi32(transposed[0], transposed[2]); | |
| 647 // a4,a12, b4,b12, c4,c12, d4,d12, a5,a13, b5,b13, c5,c13, d5,d13 | |
| 648 tmp2 = _mm_unpacklo_epi32(transposed[1], transposed[3]); | |
| 649 // a6,a14, b6,b14, c6,c14, d6,d14, a7,a15, b7,b15, c7,c15, d7,d15 | |
| 650 tmp3 = _mm_unpackhi_epi32(transposed[1], transposed[3]); | |
| 651 | |
| 652 // a0,a4, a8,a12, b0,b4, b8,b12, c0,c4, c8,c12, d0,d4, d8,d12 | |
| 653 transposed[0] = _mm_unpacklo_epi8(tmp0, tmp2); | |
| 654 // a1,a5, a9,a13, b1,b5, b9,b13, c1,c5, c9,c13, d1,d5, d9,d13 | |
| 655 transposed[1] = _mm_unpackhi_epi8(tmp0, tmp2); | |
| 656 // a2,a6, a10,a14, b2,b6, b10,b14, c2,c6, c10,c14, d2,d6, d10,d14 | |
| 657 transposed[2] = _mm_unpacklo_epi8(tmp1, tmp3); | |
| 658 // a3,a7, a11,a15, b3,b7, b11,b15, c3,c7, c11,c15, d3,d7, d11,d15 | |
| 659 transposed[3] = _mm_unpackhi_epi8(tmp1, tmp3); | |
| 660 | |
| 661 return true; | |
| 662 } | |
| 663 | |
| 664 inline void UnpackBlock(__m128i* packed, | |
| 665 __m128i* red, | |
| 666 __m128i* green, | |
| 667 __m128i* blue, | |
| 668 __m128i* alpha) { | |
| 669 const __m128i zero = _mm_set1_epi8(0); | |
| 670 __m128i tmp_low, tmp_high; | |
| 671 | |
| 672 // Unpack red. | |
| 673 tmp_low = _mm_unpacklo_epi8(packed[0], zero); | |
| 674 tmp_high = _mm_unpackhi_epi8(packed[0], zero); | |
| 675 | |
| 676 red[0] = _mm_unpacklo_epi16(tmp_low, zero); | |
| 677 red[1] = _mm_unpackhi_epi16(tmp_low, zero); | |
| 678 | |
| 679 red[2] = _mm_unpacklo_epi16(tmp_high, zero); | |
| 680 red[3] = _mm_unpackhi_epi16(tmp_high, zero); | |
| 681 | |
| 682 // Unpack green. | |
| 683 tmp_low = _mm_unpacklo_epi8(packed[1], zero); | |
| 684 tmp_high = _mm_unpackhi_epi8(packed[1], zero); | |
| 685 | |
| 686 green[0] = _mm_unpacklo_epi16(tmp_low, zero); | |
| 687 green[1] = _mm_unpackhi_epi16(tmp_low, zero); | |
| 688 | |
| 689 green[2] = _mm_unpacklo_epi16(tmp_high, zero); | |
| 690 green[3] = _mm_unpackhi_epi16(tmp_high, zero); | |
| 691 | |
| 692 // Unpack blue. | |
| 693 tmp_low = _mm_unpacklo_epi8(packed[2], zero); | |
| 694 tmp_high = _mm_unpackhi_epi8(packed[2], zero); | |
| 695 | |
| 696 blue[0] = _mm_unpacklo_epi16(tmp_low, zero); | |
| 697 blue[1] = _mm_unpackhi_epi16(tmp_low, zero); | |
| 698 | |
| 699 blue[2] = _mm_unpacklo_epi16(tmp_high, zero); | |
| 700 blue[3] = _mm_unpackhi_epi16(tmp_high, zero); | |
| 701 | |
| 702 // Unpack alpha - unused for ETC1. | |
| 703 tmp_low = _mm_unpacklo_epi8(packed[3], zero); | |
| 704 tmp_high = _mm_unpackhi_epi8(packed[3], zero); | |
| 705 | |
| 706 alpha[0] = _mm_unpacklo_epi16(tmp_low, zero); | |
| 707 alpha[1] = _mm_unpackhi_epi16(tmp_low, zero); | |
| 708 | |
| 709 alpha[2] = _mm_unpacklo_epi16(tmp_high, zero); | |
| 710 alpha[3] = _mm_unpackhi_epi16(tmp_high, zero); | |
| 711 } | |
| 712 | |
| 713 inline void CompressSolid(uint8_t* dst, uint8_t* block) { | |
| 714 // Clear destination buffer so that we can "or" in the results. | |
| 715 memset(dst, 0, 8); | |
| 716 | |
| 717 const float src_color_float[3] = {static_cast<float>(block[0]), | |
| 718 static_cast<float>(block[1]), | |
| 719 static_cast<float>(block[2])}; | |
| 720 const Color base = MakeColor555(src_color_float); | |
| 721 const __m128i base_v = | |
| 722 _mm_set_epi32(0, base.channels.r, base.channels.g, base.channels.b); | |
| 723 | |
| 724 const __m128i constant = _mm_set_epi32(0, block[2], block[1], block[0]); | |
| 725 __m128i lum; | |
| 726 __m128i colors[4]; | |
| 727 static const __m128i rgb = | |
| 728 _mm_set_epi32(0, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF); | |
| 729 | |
| 730 WriteDiff(dst, true); | |
| 731 WriteFlip(dst, false); | |
| 732 | |
| 733 WriteColors555(dst, base, base); | |
| 734 | |
| 735 uint8_t best_tbl_idx = 0; | |
| 736 uint8_t best_mod_idx = 0; | |
| 737 uint32_t best_mod_err = INT32_MAX; | |
| 738 | |
| 739 for (unsigned int tbl_idx = 0; tbl_idx < 8; ++tbl_idx) { | |
| 740 lum = _mm_set_epi32( | |
| 741 g_codeword_tables[tbl_idx][3], g_codeword_tables[tbl_idx][2], | |
| 742 g_codeword_tables[tbl_idx][1], g_codeword_tables[tbl_idx][0]); | |
| 743 colors[0] = AddAndClamp(base_v, _mm_shuffle_epi32(lum, 0x0)); | |
| 744 colors[1] = AddAndClamp(base_v, _mm_shuffle_epi32(lum, 0x55)); | |
| 745 colors[2] = AddAndClamp(base_v, _mm_shuffle_epi32(lum, 0xAA)); | |
| 746 colors[3] = AddAndClamp(base_v, _mm_shuffle_epi32(lum, 0xFF)); | |
| 747 | |
| 748 for (int i = 0; i < 4; i++) { | |
| 749 uint32_t mod_err = | |
| 750 SumSSE(GetColorErrorSSE(constant, _mm_and_si128(colors[i], rgb))); | |
| 751 colors[i] = _mm_and_si128(colors[i], rgb); | |
| 752 if (mod_err < best_mod_err) { | |
| 753 best_tbl_idx = tbl_idx; | |
| 754 best_mod_idx = i; | |
| 755 best_mod_err = mod_err; | |
| 756 | |
| 757 if (mod_err == 0) { | |
| 758 break; // We cannot do any better than this. | |
| 759 } | |
| 760 } | |
| 761 } | |
| 762 } | |
| 763 | |
| 764 WriteCodewordTable(dst, 0, best_tbl_idx); | |
| 765 WriteCodewordTable(dst, 1, best_tbl_idx); | |
| 766 | |
| 767 uint8_t pix_idx = g_mod_to_pix[best_mod_idx]; | |
| 768 uint32_t lsb = pix_idx & 0x1; | |
| 769 uint32_t msb = pix_idx >> 1; | |
| 770 | |
| 771 uint32_t pix_data = 0; | |
| 772 for (unsigned int i = 0; i < 2; ++i) { | |
| 773 for (unsigned int j = 0; j < 8; ++j) { | |
| 774 // Obtain the texel number as specified in the standard. | |
| 775 int texel_num = g_idx_to_num[i][j]; | |
| 776 pix_data |= msb << (texel_num + 16); | |
| 777 pix_data |= lsb << (texel_num); | |
| 778 } | |
| 779 } | |
| 780 | |
| 781 WritePixelData(dst, pix_data); | |
| 782 } | |
| 783 | |
| 784 } // namespace | |
| 785 | |
| 786 void TextureCompressorETC1SSE::Compress(const uint8_t* src, | |
| 787 uint8_t* dst, | |
| 788 int width, | |
| 789 int height, | |
| 790 Quality quality) { | |
| 791 DCHECK_GE(width, 4); | |
| 792 DCHECK_EQ((width & 3), 0); | |
| 793 DCHECK_GE(height, 4); | |
| 794 DCHECK_EQ((height & 3), 0); | |
| 795 | |
| 796 ALIGNAS(16) uint8_t block[64]; | |
| 797 __m128i packed[4]; | |
| 798 __m128i red[4], green[4], blue[4], alpha[4]; | |
| 799 __sse_data data; | |
| 800 | |
| 801 for (int y = 0; y < height; y += 4, src += width * 4 * 4) { | |
| 802 for (int x = 0; x < width; x += 4, dst += 8) { | |
| 803 ExtractBlock(block, src + x * 4, width); | |
| 804 if (TransposeBlock(block, packed) == false) { | |
| 805 CompressSolid(dst, block); | |
| 806 } else { | |
| 807 UnpackBlock(packed, blue, green, red, alpha); | |
| 808 | |
| 809 data.block = block; | |
| 810 data.packed = packed; | |
| 811 data.red = red; | |
| 812 data.blue = blue; | |
| 813 data.green = green; | |
| 814 | |
| 815 CompressBlock(dst, &data); | |
| 816 } | |
| 817 } | |
| 818 } | |
| 819 } | |
| 820 | |
| 821 } // namespace cc | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1136083003:
Revert of Add ETC1 powered SSE encoder for tile texture compression (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master