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146 lines
4.7 KiB
146 lines
4.7 KiB
/* |
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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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/* 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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