147 lines
4.7 KiB
C
147 lines
4.7 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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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