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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * TTA (The Lossless True Audio) data |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #include "ttadata.h" |
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| 22 | |||
| 23 | const uint32_t ff_tta_shift_1[] = { |
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| 24 | 0x00000001, 0x00000002, 0x00000004, 0x00000008, |
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| 25 | 0x00000010, 0x00000020, 0x00000040, 0x00000080, |
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| 26 | 0x00000100, 0x00000200, 0x00000400, 0x00000800, |
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| 27 | 0x00001000, 0x00002000, 0x00004000, 0x00008000, |
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| 28 | 0x00010000, 0x00020000, 0x00040000, 0x00080000, |
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| 29 | 0x00100000, 0x00200000, 0x00400000, 0x00800000, |
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| 30 | 0x01000000, 0x02000000, 0x04000000, 0x08000000, |
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| 31 | 0x10000000, 0x20000000, 0x40000000, 0x80000000, |
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| 32 | 0x80000000, 0x80000000, 0x80000000, 0x80000000, |
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| 33 | 0x80000000, 0x80000000, 0x80000000, 0x80000000 |
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| 34 | }; |
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| 35 | |||
| 36 | const uint32_t * const ff_tta_shift_16 = ff_tta_shift_1 + 4; |
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| 37 | |||
| 38 | const uint8_t ff_tta_filter_configs[] = { 10, 9, 10, 12 }; |
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| 39 | |||
| 40 | void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1) |
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| 41 | { |
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| 42 | c->k0 = k0; |
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| 43 | c->k1 = k1; |
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| 44 | c->sum0 = ff_tta_shift_16[k0]; |
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| 45 | c->sum1 = ff_tta_shift_16[k1]; |
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| 46 | } |
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| 47 | |||
| 48 | void ff_tta_filter_init(TTAFilter *c, int32_t shift) { |
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| 49 | memset(c, 0, sizeof(TTAFilter)); |
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| 50 | c->shift = shift; |
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| 51 | c->round = ff_tta_shift_1[shift-1]; |
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| 52 | } |