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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 2 | * AC-3 and E-AC-3 decoder tables |
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| 3 | * Copyright (c) 2007 Bartlomiej Wolowiec |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * Tables taken directly from the AC-3 spec. |
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| 25 | */ |
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| 26 | |||
| 27 | #include "ac3dec_data.h" |
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| 28 | #include "ac3.h" |
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| 29 | |||
| 30 | /** |
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| 31 | * Table used to ungroup 3 values stored in 5 bits. |
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| 32 | * Used by bap=1 mantissas and GAQ. |
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| 33 | * ff_ac3_ungroup_3_in_5_bits_tab[i] = { i/9, (i%9)/3, (i%9)%3 } |
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| 34 | */ |
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| 35 | const uint8_t ff_ac3_ungroup_3_in_5_bits_tab[32][3] = { |
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| 36 | { 0, 0, 0 }, { 0, 0, 1 }, { 0, 0, 2 }, { 0, 1, 0 }, |
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| 37 | { 0, 1, 1 }, { 0, 1, 2 }, { 0, 2, 0 }, { 0, 2, 1 }, |
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| 38 | { 0, 2, 2 }, { 1, 0, 0 }, { 1, 0, 1 }, { 1, 0, 2 }, |
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| 39 | { 1, 1, 0 }, { 1, 1, 1 }, { 1, 1, 2 }, { 1, 2, 0 }, |
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| 40 | { 1, 2, 1 }, { 1, 2, 2 }, { 2, 0, 0 }, { 2, 0, 1 }, |
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| 41 | { 2, 0, 2 }, { 2, 1, 0 }, { 2, 1, 1 }, { 2, 1, 2 }, |
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| 42 | { 2, 2, 0 }, { 2, 2, 1 }, { 2, 2, 2 }, { 3, 0, 0 }, |
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| 43 | { 3, 0, 1 }, { 3, 0, 2 }, { 3, 1, 0 }, { 3, 1, 1 } |
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| 44 | }; |
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| 45 | |||
| 46 | const uint8_t ff_eac3_hebap_tab[64] = { |
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| 47 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 8, |
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| 48 | 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, |
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| 49 | 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, |
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| 50 | 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, |
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| 51 | 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, |
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| 52 | 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, |
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| 53 | 19, 19, 19, 19, |
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| 54 | }; |
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| 55 | |||
| 56 | /** |
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| 57 | * Table E2.15 Default Spectral Extension Banding Structure |
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| 58 | */ |
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| 59 | const uint8_t ff_eac3_default_spx_band_struct[17] = |
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| 60 | { 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1 }; |