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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 | #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 */ |