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60 lines
2.1 KiB
60 lines
2.1 KiB
/* |
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* AC-3 and E-AC-3 decoder tables |
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* Copyright (c) 2007 Bartlomiej Wolowiec <bartek.wolowiec@gmail.com> |
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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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* Tables taken directly from the AC-3 spec. |
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*/ |
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#include "ac3dec_data.h" |
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#include "ac3.h" |
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/** |
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* Table used to ungroup 3 values stored in 5 bits. |
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* Used by bap=1 mantissas and GAQ. |
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* ff_ac3_ungroup_3_in_5_bits_tab[i] = { i/9, (i%9)/3, (i%9)%3 } |
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*/ |
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const uint8_t ff_ac3_ungroup_3_in_5_bits_tab[32][3] = { |
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{ 0, 0, 0 }, { 0, 0, 1 }, { 0, 0, 2 }, { 0, 1, 0 }, |
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{ 0, 1, 1 }, { 0, 1, 2 }, { 0, 2, 0 }, { 0, 2, 1 }, |
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{ 0, 2, 2 }, { 1, 0, 0 }, { 1, 0, 1 }, { 1, 0, 2 }, |
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{ 1, 1, 0 }, { 1, 1, 1 }, { 1, 1, 2 }, { 1, 2, 0 }, |
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{ 1, 2, 1 }, { 1, 2, 2 }, { 2, 0, 0 }, { 2, 0, 1 }, |
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{ 2, 0, 2 }, { 2, 1, 0 }, { 2, 1, 1 }, { 2, 1, 2 }, |
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{ 2, 2, 0 }, { 2, 2, 1 }, { 2, 2, 2 }, { 3, 0, 0 }, |
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{ 3, 0, 1 }, { 3, 0, 2 }, { 3, 1, 0 }, { 3, 1, 1 } |
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}; |
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const uint8_t ff_eac3_hebap_tab[64] = { |
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0, 1, 2, 3, 4, 5, 6, 7, 8, 8, |
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8, 8, 9, 9, 9, 10, 10, 10, 10, 11, |
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11, 11, 11, 12, 12, 12, 12, 13, 13, 13, |
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13, 14, 14, 14, 14, 15, 15, 15, 15, 16, |
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16, 16, 16, 17, 17, 17, 17, 18, 18, 18, |
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18, 18, 18, 18, 18, 19, 19, 19, 19, 19, |
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19, 19, 19, 19, |
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}; |
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/** |
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* Table E2.15 Default Spectral Extension Banding Structure |
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*/ |
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const uint8_t ff_eac3_default_spx_band_struct[17] = |
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{ 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 };
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