ffmpeg/libavcodec/ttadata.h

   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 */