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