blob: 48c4cd0354247b397e3a3ccb37fec9f7cd3d99cb
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 | #ifndef AVCODEC_TTADATA_H |
22 | #define AVCODEC_TTADATA_H |
23 | |
24 | #include "internal.h" |
25 | |
26 | #define MAX_ORDER 16 |
27 | typedef struct TTAFilter { |
28 | int32_t shift, round, error; |
29 | int32_t qm[MAX_ORDER]; |
30 | int32_t dx[MAX_ORDER]; |
31 | int32_t dl[MAX_ORDER]; |
32 | } TTAFilter; |
33 | |
34 | typedef struct TTARice { |
35 | uint32_t k0, k1, sum0, sum1; |
36 | } TTARice; |
37 | |
38 | typedef struct TTAChannel { |
39 | int32_t predictor; |
40 | TTAFilter filter; |
41 | TTARice rice; |
42 | } TTAChannel; |
43 | |
44 | extern const uint32_t ff_tta_shift_1[]; |
45 | extern const uint32_t * const ff_tta_shift_16; |
46 | extern const uint8_t ff_tta_filter_configs[]; |
47 | |
48 | void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1); |
49 | void ff_tta_filter_init(TTAFilter *c, int32_t shift); |
50 | #endif /* AVCODEC_TTADATA_H */ |
51 |