libavcodec/mpegaudiodata.c

   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 mpegaudiodata.c
  24  * mpeg audio layer common tables.
  25  */
  26
  27 #include "mpegaudiodata.h"
  28
  29
  30 const 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
  40 const uint16_t ff_mpa_freq_tab[3] = { 44100, 48000, 32000 };
  41
  42 /*******************************************************/
  43 /* half mpeg encoding window (full precision) */
  44 const 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
  83 const int ff_mpa_sblimit_table[5] = { 27 , 30 , 8, 12 , 30 };
  84
  85 const 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 */
  93 const 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 ! */
 102 static const unsigned char alloc_table_0[] = {
 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 };
 131
 132 static const unsigned char alloc_table_1[] = {
 133  4,  0,  2,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16,
 134  4,  0,  2,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16,
 135  4,  0,  2,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15, 16,
 136  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 16,
 137  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 16,
 138  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 16,
 139  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 16,
 140  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 16,
 141  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 16,
 142  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 16,
 143  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 16,
 144  3,  0,  1,  2,  3,  4,  5, 16,
 145  3,  0,  1,  2,  3,  4,  5, 16,
 146  3,  0,  1,  2,  3,  4,  5, 16,
 147  3,  0,  1,  2,  3,  4,  5, 16,
 148  3,  0,  1,  2,  3,  4,  5, 16,
 149  3,  0,  1,  2,  3,  4,  5, 16,
 150  3,  0,  1,  2,  3,  4,  5, 16,
 151  3,  0,  1,  2,  3,  4,  5, 16,
 152  3,  0,  1,  2,  3,  4,  5, 16,
 153  3,  0,  1,  2,  3,  4,  5, 16,
 154  3,  0,  1,  2,  3,  4,  5, 16,
 155  3,  0,  1,  2,  3,  4,  5, 16,
 156  2,  0,  1, 16,
 157  2,  0,  1, 16,
 158  2,  0,  1, 16,
 159  2,  0,  1, 16,
 160  2,  0,  1, 16,
 161  2,  0,  1, 16,
 162  2,  0,  1, 16,
 163 };
 164
 165 static const unsigned char alloc_table_2[] = {
 166  4,  0,  1,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
 167  4,  0,  1,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
 168  3,  0,  1,  3,  4,  5,  6,  7,
 169  3,  0,  1,  3,  4,  5,  6,  7,
 170  3,  0,  1,  3,  4,  5,  6,  7,
 171  3,  0,  1,  3,  4,  5,  6,  7,
 172  3,  0,  1,  3,  4,  5,  6,  7,
 173  3,  0,  1,  3,  4,  5,  6,  7,
 174 };
 175
 176 static const unsigned char alloc_table_3[] = {
 177  4,  0,  1,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
 178  4,  0,  1,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
 179  3,  0,  1,  3,  4,  5,  6,  7,
 180  3,  0,  1,  3,  4,  5,  6,  7,
 181  3,  0,  1,  3,  4,  5,  6,  7,
 182  3,  0,  1,  3,  4,  5,  6,  7,
 183  3,  0,  1,  3,  4,  5,  6,  7,
 184  3,  0,  1,  3,  4,  5,  6,  7,
 185  3,  0,  1,  3,  4,  5,  6,  7,
 186  3,  0,  1,  3,  4,  5,  6,  7,
 187  3,  0,  1,  3,  4,  5,  6,  7,
 188  3,  0,  1,  3,  4,  5,  6,  7,
 189 };
 190
 191 static const unsigned char alloc_table_4[] = {
 192  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
 193  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
 194  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
 195  4,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
 196  3,  0,  1,  3,  4,  5,  6,  7,
 197  3,  0,  1,  3,  4,  5,  6,  7,
 198  3,  0,  1,  3,  4,  5,  6,  7,
 199  3,  0,  1,  3,  4,  5,  6,  7,
 200  3,  0,  1,  3,  4,  5,  6,  7,
 201  3,  0,  1,  3,  4,  5,  6,  7,
 202  3,  0,  1,  3,  4,  5,  6,  7,
 203  2,  0,  1,  3,
 204  2,  0,  1,  3,
 205  2,  0,  1,  3,
 206  2,  0,  1,  3,
 207  2,  0,  1,  3,
 208  2,  0,  1,  3,
 209  2,  0,  1,  3,
 210  2,  0,  1,  3,
 211  2,  0,  1,  3,
 212  2,  0,  1,  3,
 213  2,  0,  1,  3,
 214  2,  0,  1,  3,
 215  2,  0,  1,  3,
 216  2,  0,  1,  3,
 217  2,  0,  1,  3,
 218  2,  0,  1,  3,
 219  2,  0,  1,  3,
 220  2,  0,  1,  3,
 221  2,  0,  1,  3,
 222 };
 223
 224 const unsigned char * const ff_mpa_alloc_tables[5] =
 225 { alloc_table_0, alloc_table_1, alloc_table_2, alloc_table_3, alloc_table_4, };