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      1 // Copyright 2011 Google Inc. All Rights Reserved.
      2 //
      3 // This code is licensed under the same terms as WebM:
      4 //  Software License Agreement:  http://www.webmproject.org/license/software/
      5 //  Additional IP Rights Grant:  http://www.webmproject.org/license/additional/
      6 // -----------------------------------------------------------------------------
      7 //
      8 // Cost tables for level and modes
      9 //
     10 // Author: Skal (pascal.massimino (at) gmail.com)
     11 
     12 #include "./cost.h"
     13 
     14 #if defined(__cplusplus) || defined(c_plusplus)
     15 extern "C" {
     16 #endif
     17 
     18 //------------------------------------------------------------------------------
     19 // Boolean-cost cost table
     20 
     21 const uint16_t VP8EntropyCost[256] = {
     22   1792, 1792, 1792, 1536, 1536, 1408, 1366, 1280, 1280, 1216,
     23   1178, 1152, 1110, 1076, 1061, 1024, 1024,  992,  968,  951,
     24    939,  911,  896,  878,  871,  854,  838,  820,  811,  794,
     25    786,  768,  768,  752,  740,  732,  720,  709,  704,  690,
     26    683,  672,  666,  655,  647,  640,  631,  622,  615,  607,
     27    598,  592,  586,  576,  572,  564,  559,  555,  547,  541,
     28    534,  528,  522,  512,  512,  504,  500,  494,  488,  483,
     29    477,  473,  467,  461,  458,  452,  448,  443,  438,  434,
     30    427,  424,  419,  415,  410,  406,  403,  399,  394,  390,
     31    384,  384,  377,  374,  370,  366,  362,  359,  355,  351,
     32    347,  342,  342,  336,  333,  330,  326,  323,  320,  316,
     33    312,  308,  305,  302,  299,  296,  293,  288,  287,  283,
     34    280,  277,  274,  272,  268,  266,  262,  256,  256,  256,
     35    251,  248,  245,  242,  240,  237,  234,  232,  228,  226,
     36    223,  221,  218,  216,  214,  211,  208,  205,  203,  201,
     37    198,  196,  192,  191,  188,  187,  183,  181,  179,  176,
     38    175,  171,  171,  168,  165,  163,  160,  159,  156,  154,
     39    152,  150,  148,  146,  144,  142,  139,  138,  135,  133,
     40    131,  128,  128,  125,  123,  121,  119,  117,  115,  113,
     41    111,  110,  107,  105,  103,  102,  100,   98,   96,   94,
     42     92,   91,   89,   86,   86,   83,   82,   80,   77,   76,
     43     74,   73,   71,   69,   67,   66,   64,   63,   61,   59,
     44     57,   55,   54,   52,   51,   49,   47,   46,   44,   43,
     45     41,   40,   38,   36,   35,   33,   32,   30,   29,   27,
     46     25,   24,   22,   21,   19,   18,   16,   15,   13,   12,
     47     10,    9,    7,    6,    4,    3
     48 };
     49 
     50 //------------------------------------------------------------------------------
     51 // Level cost tables
     52 
     53 // For each given level, the following table gives the pattern of contexts to
     54 // use for coding it (in [][0]) as well as the bit value to use for each
     55 // context (in [][1]).
     56 const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2] = {
     57                   {0x001, 0x000}, {0x007, 0x001}, {0x00f, 0x005},
     58   {0x00f, 0x00d}, {0x033, 0x003}, {0x033, 0x003}, {0x033, 0x023},
     59   {0x033, 0x023}, {0x033, 0x023}, {0x033, 0x023}, {0x0d3, 0x013},
     60   {0x0d3, 0x013}, {0x0d3, 0x013}, {0x0d3, 0x013}, {0x0d3, 0x013},
     61   {0x0d3, 0x013}, {0x0d3, 0x013}, {0x0d3, 0x013}, {0x0d3, 0x093},
     62   {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093},
     63   {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093},
     64   {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093},
     65   {0x0d3, 0x093}, {0x0d3, 0x093}, {0x0d3, 0x093}, {0x153, 0x053},
     66   {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053},
     67   {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053},
     68   {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053},
     69   {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053},
     70   {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053},
     71   {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053},
     72   {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053},
     73   {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x053}, {0x153, 0x153}
     74 };
     75 
     76 // fixed costs for coding levels, deduce from the coding tree.
     77 // This is only the part that doesn't depend on the probability state.
     78 const uint16_t VP8LevelFixedCosts[2048] = {
     79      0,  256,  256,  256,  256,  432,  618,  630,
     80    731,  640,  640,  828,  901,  948, 1021, 1101,
     81   1174, 1221, 1294, 1042, 1085, 1115, 1158, 1202,
     82   1245, 1275, 1318, 1337, 1380, 1410, 1453, 1497,
     83   1540, 1570, 1613, 1280, 1295, 1317, 1332, 1358,
     84   1373, 1395, 1410, 1454, 1469, 1491, 1506, 1532,
     85   1547, 1569, 1584, 1601, 1616, 1638, 1653, 1679,
     86   1694, 1716, 1731, 1775, 1790, 1812, 1827, 1853,
     87   1868, 1890, 1905, 1727, 1733, 1742, 1748, 1759,
     88   1765, 1774, 1780, 1800, 1806, 1815, 1821, 1832,
     89   1838, 1847, 1853, 1878, 1884, 1893, 1899, 1910,
     90   1916, 1925, 1931, 1951, 1957, 1966, 1972, 1983,
     91   1989, 1998, 2004, 2027, 2033, 2042, 2048, 2059,
     92   2065, 2074, 2080, 2100, 2106, 2115, 2121, 2132,
     93   2138, 2147, 2153, 2178, 2184, 2193, 2199, 2210,
     94   2216, 2225, 2231, 2251, 2257, 2266, 2272, 2283,
     95   2289, 2298, 2304, 2168, 2174, 2183, 2189, 2200,
     96   2206, 2215, 2221, 2241, 2247, 2256, 2262, 2273,
     97   2279, 2288, 2294, 2319, 2325, 2334, 2340, 2351,
     98   2357, 2366, 2372, 2392, 2398, 2407, 2413, 2424,
     99   2430, 2439, 2445, 2468, 2474, 2483, 2489, 2500,
    100   2506, 2515, 2521, 2541, 2547, 2556, 2562, 2573,
    101   2579, 2588, 2594, 2619, 2625, 2634, 2640, 2651,
    102   2657, 2666, 2672, 2692, 2698, 2707, 2713, 2724,
    103   2730, 2739, 2745, 2540, 2546, 2555, 2561, 2572,
    104   2578, 2587, 2593, 2613, 2619, 2628, 2634, 2645,
    105   2651, 2660, 2666, 2691, 2697, 2706, 2712, 2723,
    106   2729, 2738, 2744, 2764, 2770, 2779, 2785, 2796,
    107   2802, 2811, 2817, 2840, 2846, 2855, 2861, 2872,
    108   2878, 2887, 2893, 2913, 2919, 2928, 2934, 2945,
    109   2951, 2960, 2966, 2991, 2997, 3006, 3012, 3023,
    110   3029, 3038, 3044, 3064, 3070, 3079, 3085, 3096,
    111   3102, 3111, 3117, 2981, 2987, 2996, 3002, 3013,
    112   3019, 3028, 3034, 3054, 3060, 3069, 3075, 3086,
    113   3092, 3101, 3107, 3132, 3138, 3147, 3153, 3164,
    114   3170, 3179, 3185, 3205, 3211, 3220, 3226, 3237,
    115   3243, 3252, 3258, 3281, 3287, 3296, 3302, 3313,
    116   3319, 3328, 3334, 3354, 3360, 3369, 3375, 3386,
    117   3392, 3401, 3407, 3432, 3438, 3447, 3453, 3464,
    118   3470, 3479, 3485, 3505, 3511, 3520, 3526, 3537,
    119   3543, 3552, 3558, 2816, 2822, 2831, 2837, 2848,
    120   2854, 2863, 2869, 2889, 2895, 2904, 2910, 2921,
    121   2927, 2936, 2942, 2967, 2973, 2982, 2988, 2999,
    122   3005, 3014, 3020, 3040, 3046, 3055, 3061, 3072,
    123   3078, 3087, 3093, 3116, 3122, 3131, 3137, 3148,
    124   3154, 3163, 3169, 3189, 3195, 3204, 3210, 3221,
    125   3227, 3236, 3242, 3267, 3273, 3282, 3288, 3299,
    126   3305, 3314, 3320, 3340, 3346, 3355, 3361, 3372,
    127   3378, 3387, 3393, 3257, 3263, 3272, 3278, 3289,
    128   3295, 3304, 3310, 3330, 3336, 3345, 3351, 3362,
    129   3368, 3377, 3383, 3408, 3414, 3423, 3429, 3440,
    130   3446, 3455, 3461, 3481, 3487, 3496, 3502, 3513,
    131   3519, 3528, 3534, 3557, 3563, 3572, 3578, 3589,
    132   3595, 3604, 3610, 3630, 3636, 3645, 3651, 3662,
    133   3668, 3677, 3683, 3708, 3714, 3723, 3729, 3740,
    134   3746, 3755, 3761, 3781, 3787, 3796, 3802, 3813,
    135   3819, 3828, 3834, 3629, 3635, 3644, 3650, 3661,
    136   3667, 3676, 3682, 3702, 3708, 3717, 3723, 3734,
    137   3740, 3749, 3755, 3780, 3786, 3795, 3801, 3812,
    138   3818, 3827, 3833, 3853, 3859, 3868, 3874, 3885,
    139   3891, 3900, 3906, 3929, 3935, 3944, 3950, 3961,
    140   3967, 3976, 3982, 4002, 4008, 4017, 4023, 4034,
    141   4040, 4049, 4055, 4080, 4086, 4095, 4101, 4112,
    142   4118, 4127, 4133, 4153, 4159, 4168, 4174, 4185,
    143   4191, 4200, 4206, 4070, 4076, 4085, 4091, 4102,
    144   4108, 4117, 4123, 4143, 4149, 4158, 4164, 4175,
    145   4181, 4190, 4196, 4221, 4227, 4236, 4242, 4253,
    146   4259, 4268, 4274, 4294, 4300, 4309, 4315, 4326,
    147   4332, 4341, 4347, 4370, 4376, 4385, 4391, 4402,
    148   4408, 4417, 4423, 4443, 4449, 4458, 4464, 4475,
    149   4481, 4490, 4496, 4521, 4527, 4536, 4542, 4553,
    150   4559, 4568, 4574, 4594, 4600, 4609, 4615, 4626,
    151   4632, 4641, 4647, 3515, 3521, 3530, 3536, 3547,
    152   3553, 3562, 3568, 3588, 3594, 3603, 3609, 3620,
    153   3626, 3635, 3641, 3666, 3672, 3681, 3687, 3698,
    154   3704, 3713, 3719, 3739, 3745, 3754, 3760, 3771,
    155   3777, 3786, 3792, 3815, 3821, 3830, 3836, 3847,
    156   3853, 3862, 3868, 3888, 3894, 3903, 3909, 3920,
    157   3926, 3935, 3941, 3966, 3972, 3981, 3987, 3998,
    158   4004, 4013, 4019, 4039, 4045, 4054, 4060, 4071,
    159   4077, 4086, 4092, 3956, 3962, 3971, 3977, 3988,
    160   3994, 4003, 4009, 4029, 4035, 4044, 4050, 4061,
    161   4067, 4076, 4082, 4107, 4113, 4122, 4128, 4139,
    162   4145, 4154, 4160, 4180, 4186, 4195, 4201, 4212,
    163   4218, 4227, 4233, 4256, 4262, 4271, 4277, 4288,
    164   4294, 4303, 4309, 4329, 4335, 4344, 4350, 4361,
    165   4367, 4376, 4382, 4407, 4413, 4422, 4428, 4439,
    166   4445, 4454, 4460, 4480, 4486, 4495, 4501, 4512,
    167   4518, 4527, 4533, 4328, 4334, 4343, 4349, 4360,
    168   4366, 4375, 4381, 4401, 4407, 4416, 4422, 4433,
    169   4439, 4448, 4454, 4479, 4485, 4494, 4500, 4511,
    170   4517, 4526, 4532, 4552, 4558, 4567, 4573, 4584,
    171   4590, 4599, 4605, 4628, 4634, 4643, 4649, 4660,
    172   4666, 4675, 4681, 4701, 4707, 4716, 4722, 4733,
    173   4739, 4748, 4754, 4779, 4785, 4794, 4800, 4811,
    174   4817, 4826, 4832, 4852, 4858, 4867, 4873, 4884,
    175   4890, 4899, 4905, 4769, 4775, 4784, 4790, 4801,
    176   4807, 4816, 4822, 4842, 4848, 4857, 4863, 4874,
    177   4880, 4889, 4895, 4920, 4926, 4935, 4941, 4952,
    178   4958, 4967, 4973, 4993, 4999, 5008, 5014, 5025,
    179   5031, 5040, 5046, 5069, 5075, 5084, 5090, 5101,
    180   5107, 5116, 5122, 5142, 5148, 5157, 5163, 5174,
    181   5180, 5189, 5195, 5220, 5226, 5235, 5241, 5252,
    182   5258, 5267, 5273, 5293, 5299, 5308, 5314, 5325,
    183   5331, 5340, 5346, 4604, 4610, 4619, 4625, 4636,
    184   4642, 4651, 4657, 4677, 4683, 4692, 4698, 4709,
    185   4715, 4724, 4730, 4755, 4761, 4770, 4776, 4787,
    186   4793, 4802, 4808, 4828, 4834, 4843, 4849, 4860,
    187   4866, 4875, 4881, 4904, 4910, 4919, 4925, 4936,
    188   4942, 4951, 4957, 4977, 4983, 4992, 4998, 5009,
    189   5015, 5024, 5030, 5055, 5061, 5070, 5076, 5087,
    190   5093, 5102, 5108, 5128, 5134, 5143, 5149, 5160,
    191   5166, 5175, 5181, 5045, 5051, 5060, 5066, 5077,
    192   5083, 5092, 5098, 5118, 5124, 5133, 5139, 5150,
    193   5156, 5165, 5171, 5196, 5202, 5211, 5217, 5228,
    194   5234, 5243, 5249, 5269, 5275, 5284, 5290, 5301,
    195   5307, 5316, 5322, 5345, 5351, 5360, 5366, 5377,
    196   5383, 5392, 5398, 5418, 5424, 5433, 5439, 5450,
    197   5456, 5465, 5471, 5496, 5502, 5511, 5517, 5528,
    198   5534, 5543, 5549, 5569, 5575, 5584, 5590, 5601,
    199   5607, 5616, 5622, 5417, 5423, 5432, 5438, 5449,
    200   5455, 5464, 5470, 5490, 5496, 5505, 5511, 5522,
    201   5528, 5537, 5543, 5568, 5574, 5583, 5589, 5600,
    202   5606, 5615, 5621, 5641, 5647, 5656, 5662, 5673,
    203   5679, 5688, 5694, 5717, 5723, 5732, 5738, 5749,
    204   5755, 5764, 5770, 5790, 5796, 5805, 5811, 5822,
    205   5828, 5837, 5843, 5868, 5874, 5883, 5889, 5900,
    206   5906, 5915, 5921, 5941, 5947, 5956, 5962, 5973,
    207   5979, 5988, 5994, 5858, 5864, 5873, 5879, 5890,
    208   5896, 5905, 5911, 5931, 5937, 5946, 5952, 5963,
    209   5969, 5978, 5984, 6009, 6015, 6024, 6030, 6041,
    210   6047, 6056, 6062, 6082, 6088, 6097, 6103, 6114,
    211   6120, 6129, 6135, 6158, 6164, 6173, 6179, 6190,
    212   6196, 6205, 6211, 6231, 6237, 6246, 6252, 6263,
    213   6269, 6278, 6284, 6309, 6315, 6324, 6330, 6341,
    214   6347, 6356, 6362, 6382, 6388, 6397, 6403, 6414,
    215   6420, 6429, 6435, 3515, 3521, 3530, 3536, 3547,
    216   3553, 3562, 3568, 3588, 3594, 3603, 3609, 3620,
    217   3626, 3635, 3641, 3666, 3672, 3681, 3687, 3698,
    218   3704, 3713, 3719, 3739, 3745, 3754, 3760, 3771,
    219   3777, 3786, 3792, 3815, 3821, 3830, 3836, 3847,
    220   3853, 3862, 3868, 3888, 3894, 3903, 3909, 3920,
    221   3926, 3935, 3941, 3966, 3972, 3981, 3987, 3998,
    222   4004, 4013, 4019, 4039, 4045, 4054, 4060, 4071,
    223   4077, 4086, 4092, 3956, 3962, 3971, 3977, 3988,
    224   3994, 4003, 4009, 4029, 4035, 4044, 4050, 4061,
    225   4067, 4076, 4082, 4107, 4113, 4122, 4128, 4139,
    226   4145, 4154, 4160, 4180, 4186, 4195, 4201, 4212,
    227   4218, 4227, 4233, 4256, 4262, 4271, 4277, 4288,
    228   4294, 4303, 4309, 4329, 4335, 4344, 4350, 4361,
    229   4367, 4376, 4382, 4407, 4413, 4422, 4428, 4439,
    230   4445, 4454, 4460, 4480, 4486, 4495, 4501, 4512,
    231   4518, 4527, 4533, 4328, 4334, 4343, 4349, 4360,
    232   4366, 4375, 4381, 4401, 4407, 4416, 4422, 4433,
    233   4439, 4448, 4454, 4479, 4485, 4494, 4500, 4511,
    234   4517, 4526, 4532, 4552, 4558, 4567, 4573, 4584,
    235   4590, 4599, 4605, 4628, 4634, 4643, 4649, 4660,
    236   4666, 4675, 4681, 4701, 4707, 4716, 4722, 4733,
    237   4739, 4748, 4754, 4779, 4785, 4794, 4800, 4811,
    238   4817, 4826, 4832, 4852, 4858, 4867, 4873, 4884,
    239   4890, 4899, 4905, 4769, 4775, 4784, 4790, 4801,
    240   4807, 4816, 4822, 4842, 4848, 4857, 4863, 4874,
    241   4880, 4889, 4895, 4920, 4926, 4935, 4941, 4952,
    242   4958, 4967, 4973, 4993, 4999, 5008, 5014, 5025,
    243   5031, 5040, 5046, 5069, 5075, 5084, 5090, 5101,
    244   5107, 5116, 5122, 5142, 5148, 5157, 5163, 5174,
    245   5180, 5189, 5195, 5220, 5226, 5235, 5241, 5252,
    246   5258, 5267, 5273, 5293, 5299, 5308, 5314, 5325,
    247   5331, 5340, 5346, 4604, 4610, 4619, 4625, 4636,
    248   4642, 4651, 4657, 4677, 4683, 4692, 4698, 4709,
    249   4715, 4724, 4730, 4755, 4761, 4770, 4776, 4787,
    250   4793, 4802, 4808, 4828, 4834, 4843, 4849, 4860,
    251   4866, 4875, 4881, 4904, 4910, 4919, 4925, 4936,
    252   4942, 4951, 4957, 4977, 4983, 4992, 4998, 5009,
    253   5015, 5024, 5030, 5055, 5061, 5070, 5076, 5087,
    254   5093, 5102, 5108, 5128, 5134, 5143, 5149, 5160,
    255   5166, 5175, 5181, 5045, 5051, 5060, 5066, 5077,
    256   5083, 5092, 5098, 5118, 5124, 5133, 5139, 5150,
    257   5156, 5165, 5171, 5196, 5202, 5211, 5217, 5228,
    258   5234, 5243, 5249, 5269, 5275, 5284, 5290, 5301,
    259   5307, 5316, 5322, 5345, 5351, 5360, 5366, 5377,
    260   5383, 5392, 5398, 5418, 5424, 5433, 5439, 5450,
    261   5456, 5465, 5471, 5496, 5502, 5511, 5517, 5528,
    262   5534, 5543, 5549, 5569, 5575, 5584, 5590, 5601,
    263   5607, 5616, 5622, 5417, 5423, 5432, 5438, 5449,
    264   5455, 5464, 5470, 5490, 5496, 5505, 5511, 5522,
    265   5528, 5537, 5543, 5568, 5574, 5583, 5589, 5600,
    266   5606, 5615, 5621, 5641, 5647, 5656, 5662, 5673,
    267   5679, 5688, 5694, 5717, 5723, 5732, 5738, 5749,
    268   5755, 5764, 5770, 5790, 5796, 5805, 5811, 5822,
    269   5828, 5837, 5843, 5868, 5874, 5883, 5889, 5900,
    270   5906, 5915, 5921, 5941, 5947, 5956, 5962, 5973,
    271   5979, 5988, 5994, 5858, 5864, 5873, 5879, 5890,
    272   5896, 5905, 5911, 5931, 5937, 5946, 5952, 5963,
    273   5969, 5978, 5984, 6009, 6015, 6024, 6030, 6041,
    274   6047, 6056, 6062, 6082, 6088, 6097, 6103, 6114,
    275   6120, 6129, 6135, 6158, 6164, 6173, 6179, 6190,
    276   6196, 6205, 6211, 6231, 6237, 6246, 6252, 6263,
    277   6269, 6278, 6284, 6309, 6315, 6324, 6330, 6341,
    278   6347, 6356, 6362, 6382, 6388, 6397, 6403, 6414,
    279   6420, 6429, 6435, 5303, 5309, 5318, 5324, 5335,
    280   5341, 5350, 5356, 5376, 5382, 5391, 5397, 5408,
    281   5414, 5423, 5429, 5454, 5460, 5469, 5475, 5486,
    282   5492, 5501, 5507, 5527, 5533, 5542, 5548, 5559,
    283   5565, 5574, 5580, 5603, 5609, 5618, 5624, 5635,
    284   5641, 5650, 5656, 5676, 5682, 5691, 5697, 5708,
    285   5714, 5723, 5729, 5754, 5760, 5769, 5775, 5786,
    286   5792, 5801, 5807, 5827, 5833, 5842, 5848, 5859,
    287   5865, 5874, 5880, 5744, 5750, 5759, 5765, 5776,
    288   5782, 5791, 5797, 5817, 5823, 5832, 5838, 5849,
    289   5855, 5864, 5870, 5895, 5901, 5910, 5916, 5927,
    290   5933, 5942, 5948, 5968, 5974, 5983, 5989, 6000,
    291   6006, 6015, 6021, 6044, 6050, 6059, 6065, 6076,
    292   6082, 6091, 6097, 6117, 6123, 6132, 6138, 6149,
    293   6155, 6164, 6170, 6195, 6201, 6210, 6216, 6227,
    294   6233, 6242, 6248, 6268, 6274, 6283, 6289, 6300,
    295   6306, 6315, 6321, 6116, 6122, 6131, 6137, 6148,
    296   6154, 6163, 6169, 6189, 6195, 6204, 6210, 6221,
    297   6227, 6236, 6242, 6267, 6273, 6282, 6288, 6299,
    298   6305, 6314, 6320, 6340, 6346, 6355, 6361, 6372,
    299   6378, 6387, 6393, 6416, 6422, 6431, 6437, 6448,
    300   6454, 6463, 6469, 6489, 6495, 6504, 6510, 6521,
    301   6527, 6536, 6542, 6567, 6573, 6582, 6588, 6599,
    302   6605, 6614, 6620, 6640, 6646, 6655, 6661, 6672,
    303   6678, 6687, 6693, 6557, 6563, 6572, 6578, 6589,
    304   6595, 6604, 6610, 6630, 6636, 6645, 6651, 6662,
    305   6668, 6677, 6683, 6708, 6714, 6723, 6729, 6740,
    306   6746, 6755, 6761, 6781, 6787, 6796, 6802, 6813,
    307   6819, 6828, 6834, 6857, 6863, 6872, 6878, 6889,
    308   6895, 6904, 6910, 6930, 6936, 6945, 6951, 6962,
    309   6968, 6977, 6983, 7008, 7014, 7023, 7029, 7040,
    310   7046, 7055, 7061, 7081, 7087, 7096, 7102, 7113,
    311   7119, 7128, 7134, 6392, 6398, 6407, 6413, 6424,
    312   6430, 6439, 6445, 6465, 6471, 6480, 6486, 6497,
    313   6503, 6512, 6518, 6543, 6549, 6558, 6564, 6575,
    314   6581, 6590, 6596, 6616, 6622, 6631, 6637, 6648,
    315   6654, 6663, 6669, 6692, 6698, 6707, 6713, 6724,
    316   6730, 6739, 6745, 6765, 6771, 6780, 6786, 6797,
    317   6803, 6812, 6818, 6843, 6849, 6858, 6864, 6875,
    318   6881, 6890, 6896, 6916, 6922, 6931, 6937, 6948,
    319   6954, 6963, 6969, 6833, 6839, 6848, 6854, 6865,
    320   6871, 6880, 6886, 6906, 6912, 6921, 6927, 6938,
    321   6944, 6953, 6959, 6984, 6990, 6999, 7005, 7016,
    322   7022, 7031, 7037, 7057, 7063, 7072, 7078, 7089,
    323   7095, 7104, 7110, 7133, 7139, 7148, 7154, 7165,
    324   7171, 7180, 7186, 7206, 7212, 7221, 7227, 7238,
    325   7244, 7253, 7259, 7284, 7290, 7299, 7305, 7316,
    326   7322, 7331, 7337, 7357, 7363, 7372, 7378, 7389,
    327   7395, 7404, 7410, 7205, 7211, 7220, 7226, 7237,
    328   7243, 7252, 7258, 7278, 7284, 7293, 7299, 7310,
    329   7316, 7325, 7331, 7356, 7362, 7371, 7377, 7388,
    330   7394, 7403, 7409, 7429, 7435, 7444, 7450, 7461,
    331   7467, 7476, 7482, 7505, 7511, 7520, 7526, 7537,
    332   7543, 7552, 7558, 7578, 7584, 7593, 7599, 7610,
    333   7616, 7625, 7631, 7656, 7662, 7671, 7677, 7688,
    334   7694, 7703, 7709, 7729, 7735, 7744, 7750, 7761
    335 };
    336 
    337 static int VariableLevelCost(int level, const uint8_t probas[NUM_PROBAS]) {
    338   int pattern = VP8LevelCodes[level - 1][0];
    339   int bits = VP8LevelCodes[level - 1][1];
    340   int cost = 0;
    341   int i;
    342   for (i = 2; pattern; ++i) {
    343     if (pattern & 1) {
    344       cost += VP8BitCost(bits & 1, probas[i]);
    345     }
    346     bits >>= 1;
    347     pattern >>= 1;
    348   }
    349   return cost;
    350 }
    351 
    352 //------------------------------------------------------------------------------
    353 // Pre-calc level costs once for all
    354 
    355 void VP8CalculateLevelCosts(VP8Proba* const proba) {
    356   int ctype, band, ctx;
    357 
    358   if (!proba->dirty_) return;  // nothing to do.
    359 
    360   for (ctype = 0; ctype < NUM_TYPES; ++ctype) {
    361     for (band = 0; band < NUM_BANDS; ++band) {
    362       for(ctx = 0; ctx < NUM_CTX; ++ctx) {
    363         const uint8_t* const p = proba->coeffs_[ctype][band][ctx];
    364         uint16_t* const table = proba->level_cost_[ctype][band][ctx];
    365         const int cost_base = VP8BitCost(1, p[1]);
    366         int v;
    367         table[0] = VP8BitCost(0, p[1]);
    368         for (v = 1; v <= MAX_VARIABLE_LEVEL; ++v) {
    369           table[v] = cost_base + VariableLevelCost(v, p);
    370         }
    371         // Starting at level 67 and up, the variable part of the cost is
    372         // actually constant.
    373       }
    374     }
    375   }
    376   proba->dirty_ = 0;
    377 }
    378 
    379 //------------------------------------------------------------------------------
    380 // Mode cost tables.
    381 
    382 // These are the fixed probabilities (in the coding trees) turned into bit-cost
    383 // by calling VP8BitCost().
    384 const uint16_t VP8FixedCostsUV[4] = { 302, 984, 439, 642 };
    385 // note: these values include the fixed VP8BitCost(1, 145) mode selection cost.
    386 const uint16_t VP8FixedCostsI16[4] = { 663, 919, 872, 919 };
    387 const uint16_t VP8FixedCostsI4[NUM_BMODES][NUM_BMODES][NUM_BMODES] = {
    388   { {  251, 1362, 1934, 2085, 2314, 2230, 1839, 1988, 2437, 2348 },
    389     {  403,  680, 1507, 1519, 2060, 2005, 1992, 1914, 1924, 1733 },
    390     {  353, 1121,  973, 1895, 2060, 1787, 1671, 1516, 2012, 1868 },
    391     {  770,  852, 1581,  632, 1393, 1780, 1823, 1936, 1074, 1218 },
    392     {  510, 1270, 1467, 1319,  847, 1279, 1792, 2094, 1080, 1353 },
    393     {  488, 1322,  918, 1573, 1300,  883, 1814, 1752, 1756, 1502 },
    394     {  425,  992, 1820, 1514, 1843, 2440,  937, 1771, 1924, 1129 },
    395     {  363, 1248, 1257, 1970, 2194, 2385, 1569,  953, 1951, 1601 },
    396     {  723, 1257, 1631,  964,  963, 1508, 1697, 1824,  671, 1418 },
    397     {  635, 1038, 1573,  930, 1673, 1413, 1410, 1687, 1410,  749 } },
    398   { {  451,  613, 1345, 1702, 1870, 1716, 1728, 1766, 2190, 2310 },
    399     {  678,  453, 1171, 1443, 1925, 1831, 2045, 1781, 1887, 1602 },
    400     {  711,  666,  674, 1718, 1910, 1493, 1775, 1193, 2325, 2325 },
    401     {  883,  854, 1583,  542, 1800, 1878, 1664, 2149, 1207, 1087 },
    402     {  669,  994, 1248, 1122,  949, 1179, 1376, 1729, 1070, 1244 },
    403     {  715, 1026,  715, 1350, 1430,  930, 1717, 1296, 1479, 1479 },
    404     {  544,  841, 1656, 1450, 2094, 3883, 1010, 1759, 2076,  809 },
    405     {  610,  855,  957, 1553, 2067, 1561, 1704,  824, 2066, 1226 },
    406     {  833,  960, 1416,  819, 1277, 1619, 1501, 1617,  757, 1182 },
    407     {  711,  964, 1252,  879, 1441, 1828, 1508, 1636, 1594,  734 } },
    408   { {  605,  764,  734, 1713, 1747, 1192, 1819, 1353, 1877, 2392 },
    409     {  866,  641,  586, 1622, 2072, 1431, 1888, 1346, 2189, 1764 },
    410     {  901,  851,  456, 2165, 2281, 1405, 1739, 1193, 2183, 2443 },
    411     {  770, 1045,  952, 1078, 1342, 1191, 1436, 1063, 1303,  995 },
    412     {  901, 1086,  727, 1170,  884, 1105, 1267, 1401, 1739, 1337 },
    413     {  951, 1162,  595, 1488, 1388,  703, 1790, 1366, 2057, 1724 },
    414     {  534,  986, 1273, 1987, 3273, 1485, 1024, 1399, 1583,  866 },
    415     {  699, 1182,  695, 1978, 1726, 1986, 1326,  714, 1750, 1672 },
    416     {  951, 1217, 1209,  920, 1062, 1441, 1548,  999,  952,  932 },
    417     {  733, 1284,  784, 1256, 1557, 1098, 1257, 1357, 1414,  908 } },
    418   { {  316, 1075, 1653, 1220, 2145, 2051, 1730, 2131, 1884, 1790 },
    419     {  745,  516, 1404,  894, 1599, 2375, 2013, 2105, 1475, 1381 },
    420     {  516,  729, 1088, 1319, 1637, 3426, 1636, 1275, 1531, 1453 },
    421     {  894,  943, 2138,  468, 1704, 2259, 2069, 1763, 1266, 1158 },
    422     {  605, 1025, 1235,  871, 1170, 1767, 1493, 1500, 1104, 1258 },
    423     {  739,  826, 1207, 1151, 1412,  846, 1305, 2726, 1014, 1569 },
    424     {  558,  825, 1820, 1398, 3344, 1556, 1218, 1550, 1228,  878 },
    425     {  429,  951, 1089, 1816, 3861, 3861, 1556,  969, 1568, 1828 },
    426     {  883,  961, 1752,  769, 1468, 1810, 2081, 2346,  613, 1298 },
    427     {  803,  895, 1372,  641, 1303, 1708, 1686, 1700, 1306, 1033 } },
    428   { {  439, 1267, 1270, 1579,  963, 1193, 1723, 1729, 1198, 1993 },
    429     {  705,  725, 1029, 1153, 1176, 1103, 1821, 1567, 1259, 1574 },
    430     {  723,  859,  802, 1253,  972, 1202, 1407, 1665, 1520, 1674 },
    431     {  894,  960, 1254,  887, 1052, 1607, 1344, 1349,  865, 1150 },
    432     {  833, 1312, 1337, 1205,  572, 1288, 1414, 1529, 1088, 1430 },
    433     {  842, 1279, 1068, 1861,  862,  688, 1861, 1630, 1039, 1381 },
    434     {  766,  938, 1279, 1546, 3338, 1550, 1031, 1542, 1288,  640 },
    435     {  715, 1090,  835, 1609, 1100, 1100, 1603, 1019, 1102, 1617 },
    436     {  894, 1813, 1500, 1188,  789, 1194, 1491, 1919,  617, 1333 },
    437     {  610, 1076, 1644, 1281, 1283,  975, 1179, 1688, 1434,  889 } },
    438   { {  544,  971, 1146, 1849, 1221,  740, 1857, 1621, 1683, 2430 },
    439     {  723,  705,  961, 1371, 1426,  821, 2081, 2079, 1839, 1380 },
    440     {  783,  857,  703, 2145, 1419,  814, 1791, 1310, 1609, 2206 },
    441     {  997, 1000, 1153,  792, 1229, 1162, 1810, 1418,  942,  979 },
    442     {  901, 1226,  883, 1289,  793,  715, 1904, 1649, 1319, 3108 },
    443     {  979, 1478,  782, 2216, 1454,  455, 3092, 1591, 1997, 1664 },
    444     {  663, 1110, 1504, 1114, 1522, 3311,  676, 1522, 1530, 1024 },
    445     {  605, 1138, 1153, 1314, 1569, 1315, 1157,  804, 1574, 1320 },
    446     {  770, 1216, 1218, 1227,  869, 1384, 1232, 1375,  834, 1239 },
    447     {  775, 1007,  843, 1216, 1225, 1074, 2527, 1479, 1149,  975 } },
    448   { {  477,  817, 1309, 1439, 1708, 1454, 1159, 1241, 1945, 1672 },
    449     {  577,  796, 1112, 1271, 1618, 1458, 1087, 1345, 1831, 1265 },
    450     {  663,  776,  753, 1940, 1690, 1690, 1227, 1097, 3149, 1361 },
    451     {  766, 1299, 1744, 1161, 1565, 1106, 1045, 1230, 1232,  707 },
    452     {  915, 1026, 1404, 1182, 1184,  851, 1428, 2425, 1043,  789 },
    453     {  883, 1456,  790, 1082, 1086,  985, 1083, 1484, 1238, 1160 },
    454     {  507, 1345, 2261, 1995, 1847, 3636,  653, 1761, 2287,  933 },
    455     {  553, 1193, 1470, 2057, 2059, 2059,  833,  779, 2058, 1263 },
    456     {  766, 1275, 1515, 1039,  957, 1554, 1286, 1540, 1289,  705 },
    457     {  499, 1378, 1496, 1385, 1850, 1850, 1044, 2465, 1515,  720 } },
    458   { {  553,  930,  978, 2077, 1968, 1481, 1457,  761, 1957, 2362 },
    459     {  694,  864,  905, 1720, 1670, 1621, 1429,  718, 2125, 1477 },
    460     {  699,  968,  658, 3190, 2024, 1479, 1865,  750, 2060, 2320 },
    461     {  733, 1308, 1296, 1062, 1576, 1322, 1062, 1112, 1172,  816 },
    462     {  920,  927, 1052,  939,  947, 1156, 1152, 1073, 3056, 1268 },
    463     {  723, 1534,  711, 1547, 1294,  892, 1553,  928, 1815, 1561 },
    464     {  663, 1366, 1583, 2111, 1712, 3501,  522, 1155, 2130, 1133 },
    465     {  614, 1731, 1188, 2343, 1944, 3733, 1287,  487, 3546, 1758 },
    466     {  770, 1585, 1312,  826,  884, 2673, 1185, 1006, 1195, 1195 },
    467     {  758, 1333, 1273, 1023, 1621, 1162, 1351,  833, 1479,  862 } },
    468   { {  376, 1193, 1446, 1149, 1545, 1577, 1870, 1789, 1175, 1823 },
    469     {  803,  633, 1136, 1058, 1350, 1323, 1598, 2247, 1072, 1252 },
    470     {  614, 1048,  943,  981, 1152, 1869, 1461, 1020, 1618, 1618 },
    471     { 1107, 1085, 1282,  592, 1779, 1933, 1648, 2403,  691, 1246 },
    472     {  851, 1309, 1223, 1243,  895, 1593, 1792, 2317,  627, 1076 },
    473     {  770, 1216, 1030, 1125,  921,  981, 1629, 1131, 1049, 1646 },
    474     {  626, 1469, 1456, 1081, 1489, 3278,  981, 1232, 1498,  733 },
    475     {  617, 1201,  812, 1220, 1476, 1476, 1478,  970, 1228, 1488 },
    476     { 1179, 1393, 1540,  999, 1243, 1503, 1916, 1925,  414, 1614 },
    477     {  943, 1088, 1490,  682, 1112, 1372, 1756, 1505,  966,  966 } },
    478   { {  322, 1142, 1589, 1396, 2144, 1859, 1359, 1925, 2084, 1518 },
    479     {  617,  625, 1241, 1234, 2121, 1615, 1524, 1858, 1720, 1004 },
    480     {  553,  851,  786, 1299, 1452, 1560, 1372, 1561, 1967, 1713 },
    481     {  770,  977, 1396,  568, 1893, 1639, 1540, 2108, 1430, 1013 },
    482     {  684, 1120, 1375,  982,  930, 2719, 1638, 1643,  933,  993 },
    483     {  553, 1103,  996, 1356, 1361, 1005, 1507, 1761, 1184, 1268 },
    484     {  419, 1247, 1537, 1554, 1817, 3606, 1026, 1666, 1829,  923 },
    485     {  439, 1139, 1101, 1257, 3710, 1922, 1205, 1040, 1931, 1529 },
    486     {  979,  935, 1269,  847, 1202, 1286, 1530, 1535,  827, 1036 },
    487     {  516, 1378, 1569, 1110, 1798, 1798, 1198, 2199, 1543,  712 } },
    488 };
    489 
    490 //------------------------------------------------------------------------------
    491 
    492 #if defined(__cplusplus) || defined(c_plusplus)
    493 }    // extern "C"
    494 #endif
    495