1/* 2 * MPEG Audio common tables 3 * copyright (c) 2002 Fabrice Bellard 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22/** 23 * @file 24 * mpeg audio layer common tables. 25 */ 26 27#include "mpegaudiodata.h" 28 29 30const uint16_t ff_mpa_bitrate_tab[2][3][15] = { 31 { {0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448 }, 32 {0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384 }, 33 {0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320 } }, 34 { {0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256}, 35 {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160}, 36 {0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160} 37 } 38}; 39 40const uint16_t ff_mpa_freq_tab[3] = { 44100, 48000, 32000 }; 41 42/*******************************************************/ 43/* half mpeg encoding window (full precision) */ 44const int32_t ff_mpa_enwindow[257] = { 45 0, -1, -1, -1, -1, -1, -1, -2, 46 -2, -2, -2, -3, -3, -4, -4, -5, 47 -5, -6, -7, -7, -8, -9, -10, -11, 48 -13, -14, -16, -17, -19, -21, -24, -26, 49 -29, -31, -35, -38, -41, -45, -49, -53, 50 -58, -63, -68, -73, -79, -85, -91, -97, 51 -104, -111, -117, -125, -132, -139, -147, -154, 52 -161, -169, -176, -183, -190, -196, -202, -208, 53 213, 218, 222, 225, 227, 228, 228, 227, 54 224, 221, 215, 208, 200, 189, 177, 163, 55 146, 127, 106, 83, 57, 29, -2, -36, 56 -72, -111, -153, -197, -244, -294, -347, -401, 57 -459, -519, -581, -645, -711, -779, -848, -919, 58 -991, -1064, -1137, -1210, -1283, -1356, -1428, -1498, 59 -1567, -1634, -1698, -1759, -1817, -1870, -1919, -1962, 60 -2001, -2032, -2057, -2075, -2085, -2087, -2080, -2063, 61 2037, 2000, 1952, 1893, 1822, 1739, 1644, 1535, 62 1414, 1280, 1131, 970, 794, 605, 402, 185, 63 -45, -288, -545, -814, -1095, -1388, -1692, -2006, 64 -2330, -2663, -3004, -3351, -3705, -4063, -4425, -4788, 65 -5153, -5517, -5879, -6237, -6589, -6935, -7271, -7597, 66 -7910, -8209, -8491, -8755, -8998, -9219, -9416, -9585, 67 -9727, -9838, -9916, -9959, -9966, -9935, -9863, -9750, 68 -9592, -9389, -9139, -8840, -8492, -8092, -7640, -7134, 69 6574, 5959, 5288, 4561, 3776, 2935, 2037, 1082, 70 70, -998, -2122, -3300, -4533, -5818, -7154, -8540, 71 -9975,-11455,-12980,-14548,-16155,-17799,-19478,-21189, 72-22929,-24694,-26482,-28289,-30112,-31947,-33791,-35640, 73-37489,-39336,-41176,-43006,-44821,-46617,-48390,-50137, 74-51853,-53534,-55178,-56778,-58333,-59838,-61289,-62684, 75-64019,-65290,-66494,-67629,-68692,-69679,-70590,-71420, 76-72169,-72835,-73415,-73908,-74313,-74630,-74856,-74992, 77 75038, 78}; 79 80/*******************************************************/ 81/* layer 2 tables */ 82 83const int ff_mpa_sblimit_table[5] = { 27 , 30 , 8, 12 , 30 }; 84 85const int ff_mpa_quant_steps[17] = { 86 3, 5, 7, 9, 15, 87 31, 63, 127, 255, 511, 88 1023, 2047, 4095, 8191, 16383, 89 32767, 65535 90}; 91 92/* we use a negative value if grouped */ 93const int ff_mpa_quant_bits[17] = { 94 -5, -7, 3, -10, 4, 95 5, 6, 7, 8, 9, 96 10, 11, 12, 13, 14, 97 15, 16 98}; 99 100/* encoding tables which give the quantization index. Note how it is 101 possible to store them efficiently ! */ 102static const unsigned char alloc_table_1[] = { 103 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 104 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 105 4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 106 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 107 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 108 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 109 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 110 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 111 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 112 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 113 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 114 3, 0, 1, 2, 3, 4, 5, 16, 115 3, 0, 1, 2, 3, 4, 5, 16, 116 3, 0, 1, 2, 3, 4, 5, 16, 117 3, 0, 1, 2, 3, 4, 5, 16, 118 3, 0, 1, 2, 3, 4, 5, 16, 119 3, 0, 1, 2, 3, 4, 5, 16, 120 3, 0, 1, 2, 3, 4, 5, 16, 121 3, 0, 1, 2, 3, 4, 5, 16, 122 3, 0, 1, 2, 3, 4, 5, 16, 123 3, 0, 1, 2, 3, 4, 5, 16, 124 3, 0, 1, 2, 3, 4, 5, 16, 125 3, 0, 1, 2, 3, 4, 5, 16, 126 2, 0, 1, 16, 127 2, 0, 1, 16, 128 2, 0, 1, 16, 129 2, 0, 1, 16, 130 2, 0, 1, 16, 131 2, 0, 1, 16, 132 2, 0, 1, 16, 133}; 134 135static const unsigned char alloc_table_3[] = { 136 4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 137 4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 138 3, 0, 1, 3, 4, 5, 6, 7, 139 3, 0, 1, 3, 4, 5, 6, 7, 140 3, 0, 1, 3, 4, 5, 6, 7, 141 3, 0, 1, 3, 4, 5, 6, 7, 142 3, 0, 1, 3, 4, 5, 6, 7, 143 3, 0, 1, 3, 4, 5, 6, 7, 144 3, 0, 1, 3, 4, 5, 6, 7, 145 3, 0, 1, 3, 4, 5, 6, 7, 146 3, 0, 1, 3, 4, 5, 6, 7, 147 3, 0, 1, 3, 4, 5, 6, 7, 148}; 149 150static const unsigned char alloc_table_4[] = { 151 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 152 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 153 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 154 4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 155 3, 0, 1, 3, 4, 5, 6, 7, 156 3, 0, 1, 3, 4, 5, 6, 7, 157 3, 0, 1, 3, 4, 5, 6, 7, 158 3, 0, 1, 3, 4, 5, 6, 7, 159 3, 0, 1, 3, 4, 5, 6, 7, 160 3, 0, 1, 3, 4, 5, 6, 7, 161 3, 0, 1, 3, 4, 5, 6, 7, 162 2, 0, 1, 3, 163 2, 0, 1, 3, 164 2, 0, 1, 3, 165 2, 0, 1, 3, 166 2, 0, 1, 3, 167 2, 0, 1, 3, 168 2, 0, 1, 3, 169 2, 0, 1, 3, 170 2, 0, 1, 3, 171 2, 0, 1, 3, 172 2, 0, 1, 3, 173 2, 0, 1, 3, 174 2, 0, 1, 3, 175 2, 0, 1, 3, 176 2, 0, 1, 3, 177 2, 0, 1, 3, 178 2, 0, 1, 3, 179 2, 0, 1, 3, 180 2, 0, 1, 3, 181}; 182 183const unsigned char * const ff_mpa_alloc_tables[5] = 184{ alloc_table_1, alloc_table_1, alloc_table_3, alloc_table_3, alloc_table_4, }; 185