| 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 */ |