mirror of
https://gitee.com/openharmony/third_party_ffmpeg
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82ab61f901
Specifically, ff_mpa_freq_tab, ff_mpa_bitrate_tab, ff_mpa_decode_header, ff_mpegaudio_decode_header.
185 lines
6.6 KiB
C
185 lines
6.6 KiB
C
/*
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* MPEG Audio common tables
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* copyright (c) 2002 Fabrice Bellard
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* mpeg audio layer common tables.
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*/
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#include "mpegaudiodata.h"
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const uint16_t avpriv_mpa_bitrate_tab[2][3][15] = {
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{ {0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448 },
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{0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384 },
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{0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320 } },
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{ {0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256},
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{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160},
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{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160}
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}
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};
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const uint16_t avpriv_mpa_freq_tab[3] = { 44100, 48000, 32000 };
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/*******************************************************/
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/* half mpeg encoding window (full precision) */
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const int32_t ff_mpa_enwindow[257] = {
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0, -1, -1, -1, -1, -1, -1, -2,
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-2, -2, -2, -3, -3, -4, -4, -5,
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-5, -6, -7, -7, -8, -9, -10, -11,
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-13, -14, -16, -17, -19, -21, -24, -26,
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-29, -31, -35, -38, -41, -45, -49, -53,
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-58, -63, -68, -73, -79, -85, -91, -97,
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-104, -111, -117, -125, -132, -139, -147, -154,
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-161, -169, -176, -183, -190, -196, -202, -208,
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213, 218, 222, 225, 227, 228, 228, 227,
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224, 221, 215, 208, 200, 189, 177, 163,
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146, 127, 106, 83, 57, 29, -2, -36,
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-72, -111, -153, -197, -244, -294, -347, -401,
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-459, -519, -581, -645, -711, -779, -848, -919,
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-991, -1064, -1137, -1210, -1283, -1356, -1428, -1498,
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-1567, -1634, -1698, -1759, -1817, -1870, -1919, -1962,
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-2001, -2032, -2057, -2075, -2085, -2087, -2080, -2063,
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2037, 2000, 1952, 1893, 1822, 1739, 1644, 1535,
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1414, 1280, 1131, 970, 794, 605, 402, 185,
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-45, -288, -545, -814, -1095, -1388, -1692, -2006,
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-2330, -2663, -3004, -3351, -3705, -4063, -4425, -4788,
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-5153, -5517, -5879, -6237, -6589, -6935, -7271, -7597,
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-7910, -8209, -8491, -8755, -8998, -9219, -9416, -9585,
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-9727, -9838, -9916, -9959, -9966, -9935, -9863, -9750,
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-9592, -9389, -9139, -8840, -8492, -8092, -7640, -7134,
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6574, 5959, 5288, 4561, 3776, 2935, 2037, 1082,
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70, -998, -2122, -3300, -4533, -5818, -7154, -8540,
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-9975,-11455,-12980,-14548,-16155,-17799,-19478,-21189,
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-22929,-24694,-26482,-28289,-30112,-31947,-33791,-35640,
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-37489,-39336,-41176,-43006,-44821,-46617,-48390,-50137,
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-51853,-53534,-55178,-56778,-58333,-59838,-61289,-62684,
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-64019,-65290,-66494,-67629,-68692,-69679,-70590,-71420,
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-72169,-72835,-73415,-73908,-74313,-74630,-74856,-74992,
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75038,
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};
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/*******************************************************/
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/* layer 2 tables */
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const int ff_mpa_sblimit_table[5] = { 27 , 30 , 8, 12 , 30 };
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const int ff_mpa_quant_steps[17] = {
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3, 5, 7, 9, 15,
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31, 63, 127, 255, 511,
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1023, 2047, 4095, 8191, 16383,
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32767, 65535
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};
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/* we use a negative value if grouped */
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const int ff_mpa_quant_bits[17] = {
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-5, -7, 3, -10, 4,
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5, 6, 7, 8, 9,
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10, 11, 12, 13, 14,
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15, 16
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};
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/* encoding tables which give the quantization index. Note how it is
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possible to store them efficiently ! */
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static const unsigned char alloc_table_1[] = {
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4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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4, 0, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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3, 0, 1, 2, 3, 4, 5, 16,
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2, 0, 1, 16,
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2, 0, 1, 16,
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2, 0, 1, 16,
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2, 0, 1, 16,
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2, 0, 1, 16,
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2, 0, 1, 16,
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2, 0, 1, 16,
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};
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static const unsigned char alloc_table_3[] = {
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4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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4, 0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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};
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static const unsigned char alloc_table_4[] = {
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
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4, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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3, 0, 1, 3, 4, 5, 6, 7,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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2, 0, 1, 3,
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};
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const unsigned char * const ff_mpa_alloc_tables[5] =
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{ alloc_table_1, alloc_table_1, alloc_table_3, alloc_table_3, alloc_table_4, };
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