1/* 2 * IMC compatible decoder 3 * Copyright (c) 2002-2004 Maxim Poliakovski 4 * Copyright (c) 2006 Benjamin Larsson 5 * Copyright (c) 2006 Konstantin Shishkov 6 * 7 * This file is part of FFmpeg. 8 * 9 * FFmpeg is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2.1 of the License, or (at your option) any later version. 13 * 14 * FFmpeg is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with FFmpeg; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24#ifndef AVCODEC_IMCDATA_H 25#define AVCODEC_IMCDATA_H 26 27#include <stdint.h> 28 29static const uint16_t band_tab[33] = { 30 0, 3, 6, 9, 12, 16, 20, 24, 29, 34, 40, 31 46, 53, 60, 68, 76, 84, 93, 102, 111, 121, 131, 32 141, 151, 162, 173, 184, 195, 207, 219, 231, 243, 256, 33}; 34 35 36static const int8_t cyclTab[32] = { 37 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 38 12, 13, 14, 15, 16, 17, 18, 20, 21, 22, 23, 39 24, 25, 26, 27, 28, 29, 30, 31, 32, 32, 40}; 41 42static const int8_t cyclTab2[32] = { 43 -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 44 12, 13, 14, 15, 16, 17, 17, 18, 19, 20, 21, 22, 4523, 24, 25, 26, 27, 28, 29}; 46 47static const float imc_weights1[31] = { 48 0.119595, 0.123124, 0.129192, 9.97377e-2, 8.1923e-2, 9.61153e-2, 8.77885e-2, 8.61174e-2, 49 9.00882e-2, 9.91658e-2, 0.112991, 0.131126, 0.152886, 0.177292, 0.221782, 0.244917, 0.267386, 50 0.306816, 0.323046, 0.33729, 0.366773, 0.392557, 0.398076, 0.403302, 0.42451, 0.444777, 51 0.449188, 0.455445, 0.477853, 0.500669, 0.510395}; 52 53static const float imc_weights2[31] = { 54 3.23466e-3, 3.49886e-3, 3.98413e-3, 1.98116e-3, 1.16465e-3, 1.79283e-3, 1.40372e-3, 1.33274e-3, 55 1.50523e-3, 1.95064e-3, 2.77472e-3, 4.14725e-3, 6.2776e-3, 9.36401e-3, 1.71397e-2, 2.24052e-2, 56 2.83971e-2, 4.11689e-2, 4.73165e-2, 5.31631e-2, 6.66614e-2, 8.00824e-2, 8.31588e-2, 8.61397e-2, 57 9.89229e-2, 0.112197, 0.115227, 0.119613, 0.136174, 0.15445, 0.162685}; 58 59static const float imc_quantizer1[4][8] = { 60 { 8.4431201e-1, 4.7358301e-1, 1.448354, 2.7073899e-1, 7.4449003e-1, 1.241991, 1.845484, 0.0}, 61 { 8.6876702e-1, 4.7659001e-1, 1.478224, 2.5672799e-1, 7.55777e-1, 1.3229851, 2.03438, 0.0}, 62 { 7.5891501e-1, 6.2272799e-1, 1.271322, 3.47904e-1, 7.5317699e-1, 1.150767, 1.628476, 0.0}, 63 { 7.65257e-1, 6.44647e-1, 1.263824, 3.4548101e-1, 7.6384902e-1, 1.214466, 1.7638789, 0.0}, 64}; 65 66static const float imc_quantizer2[2][56] = { 67 { 1.39236e-1, 3.50548e-1, 5.9547901e-1, 8.5772401e-1, 1.121545, 1.3882281, 1.695882, 2.1270809, 68 7.2221003e-2, 1.85177e-1, 2.9521701e-1, 4.12568e-1, 5.4068601e-1, 6.7679501e-1, 8.1196898e-1, 9.4765198e-1, 69 1.0779999, 1.203415, 1.337265, 1.481871, 1.639982, 1.814766, 2.0701399, 2.449862, 70 3.7533998e-2, 1.02722e-1, 1.6021401e-1, 2.16043e-1, 2.7231601e-1, 3.3025399e-1, 3.9022601e-1, 4.52849e-1, 71 5.1794899e-1, 5.8529502e-1, 6.53956e-1, 7.2312802e-1, 7.9150802e-1, 8.5891002e-1, 9.28141e-1, 9.9706203e-1, 72 1.062153, 1.12564, 1.189834, 1.256122, 1.324469, 1.3955311, 1.468906, 1.545084, 73 1.6264729, 1.711524, 1.802705, 1.91023, 2.0533991, 2.22333, 2.4830019, 3.253329 }, 74 { 1.11654e-1, 3.54469e-1, 6.4232099e-1, 9.6128798e-1, 1.295053, 1.61777, 1.989839, 2.51107, 75 5.7721999e-2, 1.69879e-1, 2.97589e-1, 4.3858799e-1, 5.9039903e-1, 7.4934798e-1, 9.1628098e-1, 1.087297, 76 1.262751, 1.4288321, 1.6040879, 1.79067, 2.000668, 2.2394669, 2.649332, 5.2760072, 77 2.9722e-2, 8.7316997e-2, 1.4445201e-1, 2.04247e-1, 2.6879501e-1, 3.3716801e-1, 4.08811e-1, 4.8306999e-1, 78 5.6049401e-1, 6.3955498e-1, 7.2044599e-1, 8.0427998e-1, 8.8933599e-1, 9.7537601e-1, 1.062461, 1.1510431, 79 1.240236, 1.326715, 1.412513, 1.500502, 1.591749, 1.686413, 1.785239, 1.891233, 80 2.0051291, 2.127681, 2.2709141, 2.475826, 2.7219379, 3.101985, 4.686213, 6.2287788}, 81}; 82 83 84static const float xTab[14] = {7.6, 3.6, 4.4, 3.7, 6.1, 5.1, 2.3, 1.6, 6.2, 1.5, 1.8, 1.2, 0, 0}; //10014048 85 86/* precomputed table for 10^(i/4), i=-15..16 */ 87static const float imc_exp_tab[32] = { 88 1.778280e-4, 3.162278e-4, 5.623413e-4, 1.000000e-3, 89 1.778280e-3, 3.162278e-3, 5.623413e-3, 1.000000e-2, 90 1.778280e-2, 3.162278e-2, 5.623413e-2, 1.000000e-1, 91 1.778280e-1, 3.162278e-1, 5.623413e-1, 1.000000e00, 92 1.778280e00, 3.162278e00, 5.623413e00, 1.000000e01, 93 1.778280e01, 3.162278e01, 5.623413e01, 1.000000e02, 94 1.778280e02, 3.162278e02, 5.623413e02, 1.000000e03, 95 1.778280e03, 3.162278e03, 5.623413e03, 1.000000e04 96}; 97static const float * const imc_exp_tab2 = imc_exp_tab + 8; 98 99 100static const uint8_t imc_cb_select[4][32] = { 101 { 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 102 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 }, 103 { 0, 2, 0, 3, 2, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 104 0, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }, 105 { 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 106 3, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 2, 2, 2, 2 }, 107 { 0, 1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 108 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } 109}; 110 111static const uint8_t imc_huffman_sizes[4] = { 112 17, 17, 18, 18 113}; 114 115static const uint8_t imc_huffman_lens[4][4][18] = { 116 { 117 { 1, 2, 5, 6, 11, 12, 15, 16, 16, 14, 13, 10, 9, 8, 7, 4, 3 }, 118 { 2, 3, 3, 4, 4, 4, 6, 6, 7, 7, 7, 8, 9, 10, 11, 11, 2 }, 119 { 1, 4, 4, 7, 9, 10, 12, 15, 15, 14, 13, 11, 8, 6, 5, 4, 2 }, 120 { 2, 2, 4, 8, 9, 14, 15, 15, 13, 12, 11, 10, 7, 6, 5, 3, 2 }, 121 }, 122 { 123 { 2, 2, 3, 4, 7, 7, 10, 11, 12, 14, 14, 13, 9, 8, 7, 5, 2 }, 124 { 2, 3, 14, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 3, 2 }, 125 { 2, 3, 3, 4, 4, 5, 7, 9, 11, 12, 13, 13, 10, 8, 6, 4, 2 }, 126 { 2, 3, 3, 4, 4, 5, 7, 9, 11, 12, 13, 13, 10, 8, 6, 4, 2 }, 127 }, 128 { 129 { 3, 5, 8, 9, 12, 15, 17, 17, 16, 14, 13, 11, 10, 7, 6, 4, 2, 1 }, 130 { 4, 7, 8, 10, 11, 12, 15, 16, 16, 14, 13, 9, 6, 5, 3, 2, 2, 2 }, 131 { 4, 5, 6, 7, 12, 13, 17, 17, 16, 15, 14, 11, 10, 9, 8, 3, 2, 1 }, 132 { 2, 5, 7, 8, 14, 15, 16, 16, 13, 12, 11, 10, 9, 6, 4, 3, 2, 2 }, 133 }, 134 { 135 { 2, 4, 7, 9, 10, 12, 13, 15, 16, 16, 14, 11, 8, 6, 5, 3, 2, 2 }, 136 { 3, 5, 5, 7, 10, 11, 11, 9, 8, 6, 5, 4, 4, 3, 3, 3, 3, 3 }, 137 { 5, 8, 9, 9, 7, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2 }, 138 { 2, 3, 5, 7, 8, 11, 12, 13, 15, 15, 14, 10, 9, 6, 4, 3, 3, 2 }, 139 } 140}; 141 142static const uint8_t imc_huffman_syms[4][4][18] = { 143 { 144 { 7, 8, 5, 10, 3, 13, 1, 0, 15, 14, 2, 12, 11, 4, 16, 9, 6 }, 145 { 8, 9, 6, 10, 5, 4, 11, 3, 16, 12, 2, 1, 13, 0, 14, 15, 7 }, 146 { 8, 6, 9, 11, 12, 13, 14, 1, 0, 2, 15, 3, 4, 5, 10, 16, 7 }, 147 { 8, 6, 5, 3, 12, 16, 15, 14, 0, 13, 1, 2, 11, 4, 10, 9, 7 }, 148 }, 149 { 150 { 8, 7, 9, 5, 16, 4, 2, 13, 1, 15, 0, 14, 12, 3, 11, 10, 6 }, 151 { 8, 16, 0, 15, 1, 14, 2, 13, 12, 3, 11, 4, 10, 5, 6, 9, 7 }, 152 { 8, 6, 9, 10, 16, 4, 3, 13, 14, 1, 0, 15, 2, 12, 11, 5, 7 }, 153 { 8, 6, 9, 10, 16, 4, 3, 13, 14, 1, 0, 15, 2, 12, 11, 5, 7 }, 154 }, 155 { 156 { 6, 5, 4, 11, 2, 14, 15, 17, 0, 1, 13, 12, 3, 10, 16, 9, 8, 7 }, 157 { 5, 11, 3, 12, 2, 13, 0, 17, 15, 14, 1, 16, 4, 10, 9, 6, 7, 8 }, 158 { 16, 9, 5, 10, 1, 12, 15, 17, 14, 13, 0, 2, 11, 3, 4, 6, 8, 7 }, 159 { 8, 5, 4, 12, 1, 15, 0, 17, 14, 2, 13, 16, 3, 11, 10, 9, 6, 7 }, 160 }, 161 { 162 { 7, 9, 4, 11, 2, 12, 0, 14, 17, 15, 13, 1, 3, 10, 5, 16, 8, 6 }, 163 { 8, 17, 15, 5, 2, 1, 0, 3, 4, 16, 6, 7, 14, 13, 9, 10, 12, 11 }, 164 { 4, 16, 0, 1, 2, 3, 17, 15, 14, 13, 11, 5, 12, 10, 9, 7, 6, 8 }, 165 { 7, 9, 4, 11, 3, 13, 1, 0, 15, 17, 14, 2, 12, 16, 10, 6, 5, 8 }, 166 } 167}; 168 169#endif /* AVCODEC_IMCDATA_H */ 170