falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
19464 Commits
32 Branches
283MB
Tree: f83c57735e
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'f83c57735e'
${ noResults }
FFmpeg/libavcodec/mpegaudiodata.c

185 lines
6.6KB
Raw Blame History 

  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 libavcodec/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_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. 

  135. static 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. 

  150. static 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. 

  183. const unsigned char * const ff_mpa_alloc_tables[5] =

  184. { alloc_table_1, alloc_table_1, alloc_table_3, alloc_table_3, alloc_table_4, };