1 // Copyright 2010 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 // Coding trees and probas 11 // 12 // Author: Skal (pascal.massimino (at) gmail.com) 13 14 #include "./vp8i_dec.h" 15 #include "../utils/bit_reader_inl_utils.h" 16 17 #if !defined(__arm__) && !defined(_M_ARM) && !defined(__aarch64__) 18 // using a table is ~1-2% slower on ARM. Prefer the coded-tree approach then. 19 #define USE_GENERIC_TREE 20 #endif 21 22 #ifdef USE_GENERIC_TREE 23 static const int8_t kYModesIntra4[18] = { 24 -B_DC_PRED, 1, 25 -B_TM_PRED, 2, 26 -B_VE_PRED, 3, 27 4, 6, 28 -B_HE_PRED, 5, 29 -B_RD_PRED, -B_VR_PRED, 30 -B_LD_PRED, 7, 31 -B_VL_PRED, 8, 32 -B_HD_PRED, -B_HU_PRED 33 }; 34 #endif 35 36 //------------------------------------------------------------------------------ 37 // Default probabilities 38 39 // Paragraph 13.5 40 static const uint8_t 41 CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { 42 { { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, 43 { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, 44 { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } 45 }, 46 { { 253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128 }, 47 { 189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128 }, 48 { 106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128 } 49 }, 50 { { 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128 }, 51 { 181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128 }, 52 { 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128 }, 53 }, 54 { { 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128 }, 55 { 184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128 }, 56 { 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128 }, 57 }, 58 { { 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128 }, 59 { 170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128 }, 60 { 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128 } 61 }, 62 { { 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128 }, 63 { 207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128 }, 64 { 102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128 } 65 }, 66 { { 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128 }, 67 { 177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128 }, 68 { 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128 } 69 }, 70 { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, 71 { 246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, 72 { 255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } 73 } 74 }, 75 { { { 198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62 }, 76 { 131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1 }, 77 { 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128 } 78 }, 79 { { 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128 }, 80 { 184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128 }, 81 { 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128 } 82 }, 83 { { 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128 }, 84 { 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128 }, 85 { 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128 } 86 }, 87 { { 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128 }, 88 { 109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128 }, 89 { 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128 } 90 }, 91 { { 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128 }, 92 { 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128 }, 93 { 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128 } 94 }, 95 { { 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128 }, 96 { 124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128 }, 97 { 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128 } 98 }, 99 { { 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128 }, 100 { 121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128 }, 101 { 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128 } 102 }, 103 { { 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128 }, 104 { 203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128 }, 105 { 137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128 } 106 } 107 }, 108 { { { 253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128 }, 109 { 175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128 }, 110 { 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128 } 111 }, 112 { { 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128 }, 113 { 239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128 }, 114 { 155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128 } 115 }, 116 { { 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128 }, 117 { 201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128 }, 118 { 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128 } 119 }, 120 { { 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128 }, 121 { 223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128 }, 122 { 141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128 } 123 }, 124 { { 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128 }, 125 { 190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128 }, 126 { 149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 } 127 }, 128 { { 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, 129 { 247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, 130 { 240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128 } 131 }, 132 { { 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128 }, 133 { 213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128 }, 134 { 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128 } 135 }, 136 { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, 137 { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }, 138 { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 } 139 } 140 }, 141 { { { 202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255 }, 142 { 126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128 }, 143 { 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128 } 144 }, 145 { { 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128 }, 146 { 166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128 }, 147 { 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128 } 148 }, 149 { { 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128 }, 150 { 124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128 }, 151 { 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128 } 152 }, 153 { { 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128 }, 154 { 149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128 }, 155 { 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128 } 156 }, 157 { { 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128 }, 158 { 123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128 }, 159 { 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128 } 160 }, 161 { { 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128 }, 162 { 168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128 }, 163 { 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128 } 164 }, 165 { { 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128 }, 166 { 141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128 }, 167 { 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128 } 168 }, 169 { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, 170 { 244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }, 171 { 238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 } 172 } 173 } 174 }; 175 176 // Paragraph 11.5 177 static const uint8_t kBModesProba[NUM_BMODES][NUM_BMODES][NUM_BMODES - 1] = { 178 { { 231, 120, 48, 89, 115, 113, 120, 152, 112 }, 179 { 152, 179, 64, 126, 170, 118, 46, 70, 95 }, 180 { 175, 69, 143, 80, 85, 82, 72, 155, 103 }, 181 { 56, 58, 10, 171, 218, 189, 17, 13, 152 }, 182 { 114, 26, 17, 163, 44, 195, 21, 10, 173 }, 183 { 121, 24, 80, 195, 26, 62, 44, 64, 85 }, 184 { 144, 71, 10, 38, 171, 213, 144, 34, 26 }, 185 { 170, 46, 55, 19, 136, 160, 33, 206, 71 }, 186 { 63, 20, 8, 114, 114, 208, 12, 9, 226 }, 187 { 81, 40, 11, 96, 182, 84, 29, 16, 36 } }, 188 { { 134, 183, 89, 137, 98, 101, 106, 165, 148 }, 189 { 72, 187, 100, 130, 157, 111, 32, 75, 80 }, 190 { 66, 102, 167, 99, 74, 62, 40, 234, 128 }, 191 { 41, 53, 9, 178, 241, 141, 26, 8, 107 }, 192 { 74, 43, 26, 146, 73, 166, 49, 23, 157 }, 193 { 65, 38, 105, 160, 51, 52, 31, 115, 128 }, 194 { 104, 79, 12, 27, 217, 255, 87, 17, 7 }, 195 { 87, 68, 71, 44, 114, 51, 15, 186, 23 }, 196 { 47, 41, 14, 110, 182, 183, 21, 17, 194 }, 197 { 66, 45, 25, 102, 197, 189, 23, 18, 22 } }, 198 { { 88, 88, 147, 150, 42, 46, 45, 196, 205 }, 199 { 43, 97, 183, 117, 85, 38, 35, 179, 61 }, 200 { 39, 53, 200, 87, 26, 21, 43, 232, 171 }, 201 { 56, 34, 51, 104, 114, 102, 29, 93, 77 }, 202 { 39, 28, 85, 171, 58, 165, 90, 98, 64 }, 203 { 34, 22, 116, 206, 23, 34, 43, 166, 73 }, 204 { 107, 54, 32, 26, 51, 1, 81, 43, 31 }, 205 { 68, 25, 106, 22, 64, 171, 36, 225, 114 }, 206 { 34, 19, 21, 102, 132, 188, 16, 76, 124 }, 207 { 62, 18, 78, 95, 85, 57, 50, 48, 51 } }, 208 { { 193, 101, 35, 159, 215, 111, 89, 46, 111 }, 209 { 60, 148, 31, 172, 219, 228, 21, 18, 111 }, 210 { 112, 113, 77, 85, 179, 255, 38, 120, 114 }, 211 { 40, 42, 1, 196, 245, 209, 10, 25, 109 }, 212 { 88, 43, 29, 140, 166, 213, 37, 43, 154 }, 213 { 61, 63, 30, 155, 67, 45, 68, 1, 209 }, 214 { 100, 80, 8, 43, 154, 1, 51, 26, 71 }, 215 { 142, 78, 78, 16, 255, 128, 34, 197, 171 }, 216 { 41, 40, 5, 102, 211, 183, 4, 1, 221 }, 217 { 51, 50, 17, 168, 209, 192, 23, 25, 82 } }, 218 { { 138, 31, 36, 171, 27, 166, 38, 44, 229 }, 219 { 67, 87, 58, 169, 82, 115, 26, 59, 179 }, 220 { 63, 59, 90, 180, 59, 166, 93, 73, 154 }, 221 { 40, 40, 21, 116, 143, 209, 34, 39, 175 }, 222 { 47, 15, 16, 183, 34, 223, 49, 45, 183 }, 223 { 46, 17, 33, 183, 6, 98, 15, 32, 183 }, 224 { 57, 46, 22, 24, 128, 1, 54, 17, 37 }, 225 { 65, 32, 73, 115, 28, 128, 23, 128, 205 }, 226 { 40, 3, 9, 115, 51, 192, 18, 6, 223 }, 227 { 87, 37, 9, 115, 59, 77, 64, 21, 47 } }, 228 { { 104, 55, 44, 218, 9, 54, 53, 130, 226 }, 229 { 64, 90, 70, 205, 40, 41, 23, 26, 57 }, 230 { 54, 57, 112, 184, 5, 41, 38, 166, 213 }, 231 { 30, 34, 26, 133, 152, 116, 10, 32, 134 }, 232 { 39, 19, 53, 221, 26, 114, 32, 73, 255 }, 233 { 31, 9, 65, 234, 2, 15, 1, 118, 73 }, 234 { 75, 32, 12, 51, 192, 255, 160, 43, 51 }, 235 { 88, 31, 35, 67, 102, 85, 55, 186, 85 }, 236 { 56, 21, 23, 111, 59, 205, 45, 37, 192 }, 237 { 55, 38, 70, 124, 73, 102, 1, 34, 98 } }, 238 { { 125, 98, 42, 88, 104, 85, 117, 175, 82 }, 239 { 95, 84, 53, 89, 128, 100, 113, 101, 45 }, 240 { 75, 79, 123, 47, 51, 128, 81, 171, 1 }, 241 { 57, 17, 5, 71, 102, 57, 53, 41, 49 }, 242 { 38, 33, 13, 121, 57, 73, 26, 1, 85 }, 243 { 41, 10, 67, 138, 77, 110, 90, 47, 114 }, 244 { 115, 21, 2, 10, 102, 255, 166, 23, 6 }, 245 { 101, 29, 16, 10, 85, 128, 101, 196, 26 }, 246 { 57, 18, 10, 102, 102, 213, 34, 20, 43 }, 247 { 117, 20, 15, 36, 163, 128, 68, 1, 26 } }, 248 { { 102, 61, 71, 37, 34, 53, 31, 243, 192 }, 249 { 69, 60, 71, 38, 73, 119, 28, 222, 37 }, 250 { 68, 45, 128, 34, 1, 47, 11, 245, 171 }, 251 { 62, 17, 19, 70, 146, 85, 55, 62, 70 }, 252 { 37, 43, 37, 154, 100, 163, 85, 160, 1 }, 253 { 63, 9, 92, 136, 28, 64, 32, 201, 85 }, 254 { 75, 15, 9, 9, 64, 255, 184, 119, 16 }, 255 { 86, 6, 28, 5, 64, 255, 25, 248, 1 }, 256 { 56, 8, 17, 132, 137, 255, 55, 116, 128 }, 257 { 58, 15, 20, 82, 135, 57, 26, 121, 40 } }, 258 { { 164, 50, 31, 137, 154, 133, 25, 35, 218 }, 259 { 51, 103, 44, 131, 131, 123, 31, 6, 158 }, 260 { 86, 40, 64, 135, 148, 224, 45, 183, 128 }, 261 { 22, 26, 17, 131, 240, 154, 14, 1, 209 }, 262 { 45, 16, 21, 91, 64, 222, 7, 1, 197 }, 263 { 56, 21, 39, 155, 60, 138, 23, 102, 213 }, 264 { 83, 12, 13, 54, 192, 255, 68, 47, 28 }, 265 { 85, 26, 85, 85, 128, 128, 32, 146, 171 }, 266 { 18, 11, 7, 63, 144, 171, 4, 4, 246 }, 267 { 35, 27, 10, 146, 174, 171, 12, 26, 128 } }, 268 { { 190, 80, 35, 99, 180, 80, 126, 54, 45 }, 269 { 85, 126, 47, 87, 176, 51, 41, 20, 32 }, 270 { 101, 75, 128, 139, 118, 146, 116, 128, 85 }, 271 { 56, 41, 15, 176, 236, 85, 37, 9, 62 }, 272 { 71, 30, 17, 119, 118, 255, 17, 18, 138 }, 273 { 101, 38, 60, 138, 55, 70, 43, 26, 142 }, 274 { 146, 36, 19, 30, 171, 255, 97, 27, 20 }, 275 { 138, 45, 61, 62, 219, 1, 81, 188, 64 }, 276 { 32, 41, 20, 117, 151, 142, 20, 21, 163 }, 277 { 112, 19, 12, 61, 195, 128, 48, 4, 24 } } 278 }; 279 280 void VP8ResetProba(VP8Proba* const proba) { 281 memset(proba->segments_, 255u, sizeof(proba->segments_)); 282 // proba->bands_[][] is initialized later 283 } 284 285 static void ParseIntraMode(VP8BitReader* const br, 286 VP8Decoder* const dec, int mb_x) { 287 uint8_t* const top = dec->intra_t_ + 4 * mb_x; 288 uint8_t* const left = dec->intra_l_; 289 VP8MBData* const block = dec->mb_data_ + mb_x; 290 291 // Note: we don't save segment map (yet), as we don't expect 292 // to decode more than 1 keyframe. 293 if (dec->segment_hdr_.update_map_) { 294 // Hardcoded tree parsing 295 block->segment_ = !VP8GetBit(br, dec->proba_.segments_[0]) 296 ? VP8GetBit(br, dec->proba_.segments_[1]) 297 : 2 + VP8GetBit(br, dec->proba_.segments_[2]); 298 } else { 299 block->segment_ = 0; // default for intra 300 } 301 if (dec->use_skip_proba_) block->skip_ = VP8GetBit(br, dec->skip_p_); 302 303 block->is_i4x4_ = !VP8GetBit(br, 145); // decide for B_PRED first 304 if (!block->is_i4x4_) { 305 // Hardcoded 16x16 intra-mode decision tree. 306 const int ymode = 307 VP8GetBit(br, 156) ? (VP8GetBit(br, 128) ? TM_PRED : H_PRED) 308 : (VP8GetBit(br, 163) ? V_PRED : DC_PRED); 309 block->imodes_[0] = ymode; 310 memset(top, ymode, 4 * sizeof(*top)); 311 memset(left, ymode, 4 * sizeof(*left)); 312 } else { 313 uint8_t* modes = block->imodes_; 314 int y; 315 for (y = 0; y < 4; ++y) { 316 int ymode = left[y]; 317 int x; 318 for (x = 0; x < 4; ++x) { 319 const uint8_t* const prob = kBModesProba[top[x]][ymode]; 320 #ifdef USE_GENERIC_TREE 321 // Generic tree-parsing 322 int i = kYModesIntra4[VP8GetBit(br, prob[0])]; 323 while (i > 0) { 324 i = kYModesIntra4[2 * i + VP8GetBit(br, prob[i])]; 325 } 326 ymode = -i; 327 #else 328 // Hardcoded tree parsing 329 ymode = !VP8GetBit(br, prob[0]) ? B_DC_PRED : 330 !VP8GetBit(br, prob[1]) ? B_TM_PRED : 331 !VP8GetBit(br, prob[2]) ? B_VE_PRED : 332 !VP8GetBit(br, prob[3]) ? 333 (!VP8GetBit(br, prob[4]) ? B_HE_PRED : 334 (!VP8GetBit(br, prob[5]) ? B_RD_PRED : B_VR_PRED)) : 335 (!VP8GetBit(br, prob[6]) ? B_LD_PRED : 336 (!VP8GetBit(br, prob[7]) ? B_VL_PRED : 337 (!VP8GetBit(br, prob[8]) ? B_HD_PRED : B_HU_PRED))); 338 #endif // USE_GENERIC_TREE 339 top[x] = ymode; 340 } 341 memcpy(modes, top, 4 * sizeof(*top)); 342 modes += 4; 343 left[y] = ymode; 344 } 345 } 346 // Hardcoded UVMode decision tree 347 block->uvmode_ = !VP8GetBit(br, 142) ? DC_PRED 348 : !VP8GetBit(br, 114) ? V_PRED 349 : VP8GetBit(br, 183) ? TM_PRED : H_PRED; 350 } 351 352 int VP8ParseIntraModeRow(VP8BitReader* const br, VP8Decoder* const dec) { 353 int mb_x; 354 for (mb_x = 0; mb_x < dec->mb_w_; ++mb_x) { 355 ParseIntraMode(br, dec, mb_x); 356 } 357 return !dec->br_.eof_; 358 } 359 360 //------------------------------------------------------------------------------ 361 // Paragraph 13 362 363 static const uint8_t 364 CoeffsUpdateProba[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = { 365 { { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 366 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 367 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 368 }, 369 { { 176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 370 { 223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, 371 { 249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 } 372 }, 373 { { 255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, 374 { 234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 375 { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 376 }, 377 { { 255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 378 { 239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 379 { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } 380 }, 381 { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 382 { 251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 383 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 384 }, 385 { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 386 { 251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 387 { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } 388 }, 389 { { 255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255 }, 390 { 250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255 }, 391 { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 392 }, 393 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 394 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 395 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 396 } 397 }, 398 { { { 217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 399 { 225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255 }, 400 { 234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255 } 401 }, 402 { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 403 { 223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 404 { 238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255 } 405 }, 406 { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 407 { 249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 408 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 409 }, 410 { { 255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 411 { 247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 412 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 413 }, 414 { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 415 { 252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 416 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 417 }, 418 { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 419 { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 420 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 421 }, 422 { { 255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, 423 { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 424 { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 425 }, 426 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 427 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 428 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 429 } 430 }, 431 { { { 186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255 }, 432 { 234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255 }, 433 { 251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255 } 434 }, 435 { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 436 { 236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 437 { 251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255 } 438 }, 439 { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 440 { 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 441 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 442 }, 443 { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 444 { 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 445 { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 446 }, 447 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 448 { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 449 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 450 }, 451 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 452 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 453 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 454 }, 455 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 456 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 457 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 458 }, 459 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 460 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 461 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 462 } 463 }, 464 { { { 248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 465 { 250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255 }, 466 { 248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255 } 467 }, 468 { { 255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, 469 { 246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, 470 { 252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255 } 471 }, 472 { { 255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255 }, 473 { 248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, 474 { 253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255 } 475 }, 476 { { 255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 477 { 245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 478 { 253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 } 479 }, 480 { { 255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, 481 { 252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 482 { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 483 }, 484 { { 255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 485 { 249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }, 486 { 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 } 487 }, 488 { { 255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255 }, 489 { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 490 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 491 }, 492 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 493 { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }, 494 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 } 495 } 496 } 497 }; 498 499 // Paragraph 9.9 500 501 static const int kBands[16 + 1] = { 502 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, 503 0 // extra entry as sentinel 504 }; 505 506 void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec) { 507 VP8Proba* const proba = &dec->proba_; 508 int t, b, c, p; 509 for (t = 0; t < NUM_TYPES; ++t) { 510 for (b = 0; b < NUM_BANDS; ++b) { 511 for (c = 0; c < NUM_CTX; ++c) { 512 for (p = 0; p < NUM_PROBAS; ++p) { 513 const int v = VP8GetBit(br, CoeffsUpdateProba[t][b][c][p]) ? 514 VP8GetValue(br, 8) : CoeffsProba0[t][b][c][p]; 515 proba->bands_[t][b].probas_[c][p] = v; 516 } 517 } 518 } 519 for (b = 0; b < 16 + 1; ++b) { 520 proba->bands_ptr_[t][b] = &proba->bands_[t][kBands[b]]; 521 } 522 } 523 dec->use_skip_proba_ = VP8Get(br); 524 if (dec->use_skip_proba_) { 525 dec->skip_p_ = VP8GetValue(br, 8); 526 } 527 } 528 529
