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2ba45a60 DM |
1 | /* |
2 | * TTA (The Lossless True Audio) data | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include "ttadata.h" | |
22 | ||
23 | const uint32_t ff_tta_shift_1[] = { | |
24 | 0x00000001, 0x00000002, 0x00000004, 0x00000008, | |
25 | 0x00000010, 0x00000020, 0x00000040, 0x00000080, | |
26 | 0x00000100, 0x00000200, 0x00000400, 0x00000800, | |
27 | 0x00001000, 0x00002000, 0x00004000, 0x00008000, | |
28 | 0x00010000, 0x00020000, 0x00040000, 0x00080000, | |
29 | 0x00100000, 0x00200000, 0x00400000, 0x00800000, | |
30 | 0x01000000, 0x02000000, 0x04000000, 0x08000000, | |
31 | 0x10000000, 0x20000000, 0x40000000, 0x80000000, | |
32 | 0x80000000, 0x80000000, 0x80000000, 0x80000000, | |
33 | 0x80000000, 0x80000000, 0x80000000, 0x80000000 | |
34 | }; | |
35 | ||
36 | const uint32_t * const ff_tta_shift_16 = ff_tta_shift_1 + 4; | |
37 | ||
38 | const uint8_t ff_tta_filter_configs[] = { 10, 9, 10, 12 }; | |
39 | ||
40 | void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1) | |
41 | { | |
42 | c->k0 = k0; | |
43 | c->k1 = k1; | |
44 | c->sum0 = ff_tta_shift_16[k0]; | |
45 | c->sum1 = ff_tta_shift_16[k1]; | |
46 | } | |
47 | ||
48 | void ff_tta_filter_init(TTAFilter *c, int32_t shift) { | |
49 | memset(c, 0, sizeof(TTAFilter)); | |
50 | c->shift = shift; | |
51 | c->round = ff_tta_shift_1[shift-1]; | |
52 | } |