github.com/cellofellow/gopkg@v0.0.0-20140722061823-eec0544a62ad/image/webp/libwebp/src/enc/tree.c (about)

     1  // Copyright 2011 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 of token probabilities, intra modes and segments.
    11  //
    12  // Author: Skal (pascal.massimino@gmail.com)
    13  
    14  #include "./vp8enci.h"
    15  
    16  //------------------------------------------------------------------------------
    17  // Default probabilities
    18  
    19  // Paragraph 13.5
    20  const uint8_t
    21    VP8CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = {
    22    { { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 },
    23        { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 },
    24        { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }
    25      },
    26      { { 253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128 },
    27        { 189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128 },
    28        { 106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128 }
    29      },
    30      { { 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128 },
    31        { 181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128 },
    32        { 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128 },
    33      },
    34      { { 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128 },
    35        { 184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128 },
    36        { 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128 },
    37      },
    38      { { 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128 },
    39        { 170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128 },
    40        { 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128 }
    41      },
    42      { { 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128 },
    43        { 207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128 },
    44        { 102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128 }
    45      },
    46      { { 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128 },
    47        { 177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128 },
    48        { 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128 }
    49      },
    50      { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
    51        { 246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
    52        { 255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }
    53      }
    54    },
    55    { { { 198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62 },
    56        { 131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1 },
    57        { 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128 }
    58      },
    59      { { 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128 },
    60        { 184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128 },
    61        { 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128 }
    62      },
    63      { { 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128 },
    64        { 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128 },
    65        { 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128 }
    66      },
    67      { { 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128 },
    68        { 109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128 },
    69        { 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128 }
    70      },
    71      { { 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128 },
    72        { 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128 },
    73        { 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128 }
    74      },
    75      { { 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128 },
    76        { 124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128 },
    77        { 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128 }
    78      },
    79      { { 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128 },
    80        { 121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128 },
    81        { 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128 }
    82      },
    83      { { 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128 },
    84        { 203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128 },
    85        { 137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128 }
    86      }
    87    },
    88    { { { 253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128 },
    89        { 175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128 },
    90        { 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128 }
    91      },
    92      { { 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128 },
    93        { 239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128 },
    94        { 155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128 }
    95      },
    96      { { 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128 },
    97        { 201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128 },
    98        { 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128 }
    99      },
   100      { { 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128 },
   101        { 223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128 },
   102        { 141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128 }
   103      },
   104      { { 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128 },
   105        { 190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128 },
   106        { 149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }
   107      },
   108      { { 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
   109        { 247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
   110        { 240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128 }
   111      },
   112      { { 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128 },
   113        { 213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128 },
   114        { 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128 }
   115      },
   116      { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 },
   117        { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 },
   118        { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }
   119      }
   120    },
   121    { { { 202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255 },
   122        { 126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128 },
   123        { 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128 }
   124      },
   125      { { 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128 },
   126        { 166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128 },
   127        { 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128 }
   128      },
   129      { { 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128 },
   130        { 124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128 },
   131        { 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128 }
   132      },
   133      { { 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128 },
   134        { 149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128 },
   135        { 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128 }
   136      },
   137      { { 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128 },
   138        { 123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128 },
   139        { 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128 }
   140      },
   141      { { 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128 },
   142        { 168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128 },
   143        { 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128 }
   144      },
   145      { { 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128 },
   146        { 141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128 },
   147        { 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128 }
   148      },
   149      { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
   150        { 244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
   151        { 238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }
   152      }
   153    }
   154  };
   155  
   156  void VP8DefaultProbas(VP8Encoder* const enc) {
   157    VP8Proba* const probas = &enc->proba_;
   158    probas->use_skip_proba_ = 0;
   159    memset(probas->segments_, 255u, sizeof(probas->segments_));
   160    memcpy(probas->coeffs_, VP8CoeffsProba0, sizeof(VP8CoeffsProba0));
   161    // Note: we could hard-code the level_costs_ corresponding to VP8CoeffsProba0,
   162    // but that's ~11k of static data. Better call VP8CalculateLevelCosts() later.
   163    probas->dirty_ = 1;
   164  }
   165  
   166  // Paragraph 11.5.  900bytes.
   167  static const uint8_t kBModesProba[NUM_BMODES][NUM_BMODES][NUM_BMODES - 1] = {
   168    { { 231, 120, 48, 89, 115, 113, 120, 152, 112 },
   169      { 152, 179, 64, 126, 170, 118, 46, 70, 95 },
   170      { 175, 69, 143, 80, 85, 82, 72, 155, 103 },
   171      { 56, 58, 10, 171, 218, 189, 17, 13, 152 },
   172      { 114, 26, 17, 163, 44, 195, 21, 10, 173 },
   173      { 121, 24, 80, 195, 26, 62, 44, 64, 85 },
   174      { 144, 71, 10, 38, 171, 213, 144, 34, 26 },
   175      { 170, 46, 55, 19, 136, 160, 33, 206, 71 },
   176      { 63, 20, 8, 114, 114, 208, 12, 9, 226 },
   177      { 81, 40, 11, 96, 182, 84, 29, 16, 36 } },
   178    { { 134, 183, 89, 137, 98, 101, 106, 165, 148 },
   179      { 72, 187, 100, 130, 157, 111, 32, 75, 80 },
   180      { 66, 102, 167, 99, 74, 62, 40, 234, 128 },
   181      { 41, 53, 9, 178, 241, 141, 26, 8, 107 },
   182      { 74, 43, 26, 146, 73, 166, 49, 23, 157 },
   183      { 65, 38, 105, 160, 51, 52, 31, 115, 128 },
   184      { 104, 79, 12, 27, 217, 255, 87, 17, 7 },
   185      { 87, 68, 71, 44, 114, 51, 15, 186, 23 },
   186      { 47, 41, 14, 110, 182, 183, 21, 17, 194 },
   187      { 66, 45, 25, 102, 197, 189, 23, 18, 22 } },
   188    { { 88, 88, 147, 150, 42, 46, 45, 196, 205 },
   189      { 43, 97, 183, 117, 85, 38, 35, 179, 61 },
   190      { 39, 53, 200, 87, 26, 21, 43, 232, 171 },
   191      { 56, 34, 51, 104, 114, 102, 29, 93, 77 },
   192      { 39, 28, 85, 171, 58, 165, 90, 98, 64 },
   193      { 34, 22, 116, 206, 23, 34, 43, 166, 73 },
   194      { 107, 54, 32, 26, 51, 1, 81, 43, 31 },
   195      { 68, 25, 106, 22, 64, 171, 36, 225, 114 },
   196      { 34, 19, 21, 102, 132, 188, 16, 76, 124 },
   197      { 62, 18, 78, 95, 85, 57, 50, 48, 51 } },
   198    { { 193, 101, 35, 159, 215, 111, 89, 46, 111 },
   199      { 60, 148, 31, 172, 219, 228, 21, 18, 111 },
   200      { 112, 113, 77, 85, 179, 255, 38, 120, 114 },
   201      { 40, 42, 1, 196, 245, 209, 10, 25, 109 },
   202      { 88, 43, 29, 140, 166, 213, 37, 43, 154 },
   203      { 61, 63, 30, 155, 67, 45, 68, 1, 209 },
   204      { 100, 80, 8, 43, 154, 1, 51, 26, 71 },
   205      { 142, 78, 78, 16, 255, 128, 34, 197, 171 },
   206      { 41, 40, 5, 102, 211, 183, 4, 1, 221 },
   207      { 51, 50, 17, 168, 209, 192, 23, 25, 82 } },
   208    { { 138, 31, 36, 171, 27, 166, 38, 44, 229 },
   209      { 67, 87, 58, 169, 82, 115, 26, 59, 179 },
   210      { 63, 59, 90, 180, 59, 166, 93, 73, 154 },
   211      { 40, 40, 21, 116, 143, 209, 34, 39, 175 },
   212      { 47, 15, 16, 183, 34, 223, 49, 45, 183 },
   213      { 46, 17, 33, 183, 6, 98, 15, 32, 183 },
   214      { 57, 46, 22, 24, 128, 1, 54, 17, 37 },
   215      { 65, 32, 73, 115, 28, 128, 23, 128, 205 },
   216      { 40, 3, 9, 115, 51, 192, 18, 6, 223 },
   217      { 87, 37, 9, 115, 59, 77, 64, 21, 47 } },
   218    { { 104, 55, 44, 218, 9, 54, 53, 130, 226 },
   219      { 64, 90, 70, 205, 40, 41, 23, 26, 57 },
   220      { 54, 57, 112, 184, 5, 41, 38, 166, 213 },
   221      { 30, 34, 26, 133, 152, 116, 10, 32, 134 },
   222      { 39, 19, 53, 221, 26, 114, 32, 73, 255 },
   223      { 31, 9, 65, 234, 2, 15, 1, 118, 73 },
   224      { 75, 32, 12, 51, 192, 255, 160, 43, 51 },
   225      { 88, 31, 35, 67, 102, 85, 55, 186, 85 },
   226      { 56, 21, 23, 111, 59, 205, 45, 37, 192 },
   227      { 55, 38, 70, 124, 73, 102, 1, 34, 98 } },
   228    { { 125, 98, 42, 88, 104, 85, 117, 175, 82 },
   229      { 95, 84, 53, 89, 128, 100, 113, 101, 45 },
   230      { 75, 79, 123, 47, 51, 128, 81, 171, 1 },
   231      { 57, 17, 5, 71, 102, 57, 53, 41, 49 },
   232      { 38, 33, 13, 121, 57, 73, 26, 1, 85 },
   233      { 41, 10, 67, 138, 77, 110, 90, 47, 114 },
   234      { 115, 21, 2, 10, 102, 255, 166, 23, 6 },
   235      { 101, 29, 16, 10, 85, 128, 101, 196, 26 },
   236      { 57, 18, 10, 102, 102, 213, 34, 20, 43 },
   237      { 117, 20, 15, 36, 163, 128, 68, 1, 26 } },
   238    { { 102, 61, 71, 37, 34, 53, 31, 243, 192 },
   239      { 69, 60, 71, 38, 73, 119, 28, 222, 37 },
   240      { 68, 45, 128, 34, 1, 47, 11, 245, 171 },
   241      { 62, 17, 19, 70, 146, 85, 55, 62, 70 },
   242      { 37, 43, 37, 154, 100, 163, 85, 160, 1 },
   243      { 63, 9, 92, 136, 28, 64, 32, 201, 85 },
   244      { 75, 15, 9, 9, 64, 255, 184, 119, 16 },
   245      { 86, 6, 28, 5, 64, 255, 25, 248, 1 },
   246      { 56, 8, 17, 132, 137, 255, 55, 116, 128 },
   247      { 58, 15, 20, 82, 135, 57, 26, 121, 40 } },
   248    { { 164, 50, 31, 137, 154, 133, 25, 35, 218 },
   249      { 51, 103, 44, 131, 131, 123, 31, 6, 158 },
   250      { 86, 40, 64, 135, 148, 224, 45, 183, 128 },
   251      { 22, 26, 17, 131, 240, 154, 14, 1, 209 },
   252      { 45, 16, 21, 91, 64, 222, 7, 1, 197 },
   253      { 56, 21, 39, 155, 60, 138, 23, 102, 213 },
   254      { 83, 12, 13, 54, 192, 255, 68, 47, 28 },
   255      { 85, 26, 85, 85, 128, 128, 32, 146, 171 },
   256      { 18, 11, 7, 63, 144, 171, 4, 4, 246 },
   257      { 35, 27, 10, 146, 174, 171, 12, 26, 128 } },
   258    { { 190, 80, 35, 99, 180, 80, 126, 54, 45 },
   259      { 85, 126, 47, 87, 176, 51, 41, 20, 32 },
   260      { 101, 75, 128, 139, 118, 146, 116, 128, 85 },
   261      { 56, 41, 15, 176, 236, 85, 37, 9, 62 },
   262      { 71, 30, 17, 119, 118, 255, 17, 18, 138 },
   263      { 101, 38, 60, 138, 55, 70, 43, 26, 142 },
   264      { 146, 36, 19, 30, 171, 255, 97, 27, 20 },
   265      { 138, 45, 61, 62, 219, 1, 81, 188, 64 },
   266      { 32, 41, 20, 117, 151, 142, 20, 21, 163 },
   267      { 112, 19, 12, 61, 195, 128, 48, 4, 24 } }
   268  };
   269  
   270  static int PutI4Mode(VP8BitWriter* const bw, int mode,
   271                       const uint8_t* const prob) {
   272    if (VP8PutBit(bw, mode != B_DC_PRED, prob[0])) {
   273      if (VP8PutBit(bw, mode != B_TM_PRED, prob[1])) {
   274        if (VP8PutBit(bw, mode != B_VE_PRED, prob[2])) {
   275          if (!VP8PutBit(bw, mode >= B_LD_PRED, prob[3])) {
   276            if (VP8PutBit(bw, mode != B_HE_PRED, prob[4])) {
   277              VP8PutBit(bw, mode != B_RD_PRED, prob[5]);
   278            }
   279          } else {
   280            if (VP8PutBit(bw, mode != B_LD_PRED, prob[6])) {
   281              if (VP8PutBit(bw, mode != B_VL_PRED, prob[7])) {
   282                VP8PutBit(bw, mode != B_HD_PRED, prob[8]);
   283              }
   284            }
   285          }
   286        }
   287      }
   288    }
   289    return mode;
   290  }
   291  
   292  static void PutI16Mode(VP8BitWriter* const bw, int mode) {
   293    if (VP8PutBit(bw, (mode == TM_PRED || mode == H_PRED), 156)) {
   294      VP8PutBit(bw, mode == TM_PRED, 128);    // TM or HE
   295    } else {
   296      VP8PutBit(bw, mode == V_PRED, 163);     // VE or DC
   297    }
   298  }
   299  
   300  static void PutUVMode(VP8BitWriter* const bw, int uv_mode) {
   301    if (VP8PutBit(bw, uv_mode != DC_PRED, 142)) {
   302      if (VP8PutBit(bw, uv_mode != V_PRED, 114)) {
   303        VP8PutBit(bw, uv_mode != H_PRED, 183);    // else: TM_PRED
   304      }
   305    }
   306  }
   307  
   308  static void PutSegment(VP8BitWriter* const bw, int s, const uint8_t* p) {
   309    if (VP8PutBit(bw, s >= 2, p[0])) p += 1;
   310    VP8PutBit(bw, s & 1, p[1]);
   311  }
   312  
   313  void VP8CodeIntraModes(VP8Encoder* const enc) {
   314    VP8BitWriter* const bw = &enc->bw_;
   315    VP8EncIterator it;
   316    VP8IteratorInit(enc, &it);
   317    do {
   318      const VP8MBInfo* const mb = it.mb_;
   319      const uint8_t* preds = it.preds_;
   320      if (enc->segment_hdr_.update_map_) {
   321        PutSegment(bw, mb->segment_, enc->proba_.segments_);
   322      }
   323      if (enc->proba_.use_skip_proba_) {
   324        VP8PutBit(bw, mb->skip_, enc->proba_.skip_proba_);
   325      }
   326      if (VP8PutBit(bw, (mb->type_ != 0), 145)) {  // i16x16
   327        PutI16Mode(bw, preds[0]);
   328      } else {
   329        const int preds_w = enc->preds_w_;
   330        const uint8_t* top_pred = preds - preds_w;
   331        int x, y;
   332        for (y = 0; y < 4; ++y) {
   333          int left = preds[-1];
   334          for (x = 0; x < 4; ++x) {
   335            const uint8_t* const probas = kBModesProba[top_pred[x]][left];
   336            left = PutI4Mode(bw, preds[x], probas);
   337          }
   338          top_pred = preds;
   339          preds += preds_w;
   340        }
   341      }
   342      PutUVMode(bw, mb->uv_mode_);
   343    } while (VP8IteratorNext(&it));
   344  }
   345  
   346  //------------------------------------------------------------------------------
   347  // Paragraph 13
   348  
   349  const uint8_t
   350      VP8CoeffsUpdateProba[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = {
   351    { { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   352        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   353        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   354      },
   355      { { 176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   356        { 223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255 },
   357        { 249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }
   358      },
   359      { { 255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255 },
   360        { 234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   361        { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   362      },
   363      { { 255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   364        { 239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   365        { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }
   366      },
   367      { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   368        { 251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   369        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   370      },
   371      { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   372        { 251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   373        { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }
   374      },
   375      { { 255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255 },
   376        { 250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255 },
   377        { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   378      },
   379      { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   380        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   381        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   382      }
   383    },
   384    { { { 217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   385        { 225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255 },
   386        { 234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255 }
   387      },
   388      { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   389        { 223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   390        { 238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255 }
   391      },
   392      { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   393        { 249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   394        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   395      },
   396      { { 255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   397        { 247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   398        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   399      },
   400      { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   401        { 252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   402        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   403      },
   404      { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   405        { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   406        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   407      },
   408      { { 255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
   409        { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   410        { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   411      },
   412      { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   413        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   414        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   415      }
   416    },
   417    { { { 186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255 },
   418        { 234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255 },
   419        { 251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255 }
   420      },
   421      { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   422        { 236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   423        { 251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255 }
   424      },
   425      { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   426        { 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   427        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   428      },
   429      { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   430        { 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   431        { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   432      },
   433      { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   434        { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   435        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   436      },
   437      { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   438        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   439        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   440      },
   441      { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   442        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   443        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   444      },
   445      { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   446        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   447        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   448      }
   449    },
   450    { { { 248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   451        { 250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255 },
   452        { 248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255 }
   453      },
   454      { { 255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
   455        { 246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
   456        { 252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255 }
   457      },
   458      { { 255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255 },
   459        { 248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
   460        { 253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255 }
   461      },
   462      { { 255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   463        { 245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   464        { 253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }
   465      },
   466      { { 255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
   467        { 252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   468        { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   469      },
   470      { { 255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   471        { 249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
   472        { 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }
   473      },
   474      { { 255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
   475        { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   476        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   477      },
   478      { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   479        { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
   480        { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
   481      }
   482    }
   483  };
   484  
   485  void VP8WriteProbas(VP8BitWriter* const bw, const VP8Proba* const probas) {
   486    int t, b, c, p;
   487    for (t = 0; t < NUM_TYPES; ++t) {
   488      for (b = 0; b < NUM_BANDS; ++b) {
   489        for (c = 0; c < NUM_CTX; ++c) {
   490          for (p = 0; p < NUM_PROBAS; ++p) {
   491            const uint8_t p0 = probas->coeffs_[t][b][c][p];
   492            const int update = (p0 != VP8CoeffsProba0[t][b][c][p]);
   493            if (VP8PutBit(bw, update, VP8CoeffsUpdateProba[t][b][c][p])) {
   494              VP8PutValue(bw, p0, 8);
   495            }
   496          }
   497        }
   498      }
   499    }
   500    if (VP8PutBitUniform(bw, probas->use_skip_proba_)) {
   501      VP8PutValue(bw, probas->skip_proba_, 8);
   502    }
   503  }
   504