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  1. /*
  2.  * gsm 06.10 decoder data
  3.  * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #ifndef AVCODEC_GSMDEC_DATA_H
  23. #define AVCODEC_GSMDEC_DATA_H
  24.  
  25. #include <stdint.h>
  26. #include "avcodec.h"
  27.  
  28. typedef struct GSMContext {
  29.     // Contains first 120 elements from the previous frame
  30.     // (used by long_term_synth according to the "lag"),
  31.     // then in the following 160 elements the current
  32.     // frame is constructed.
  33.     int16_t ref_buf[280];
  34.     int v[9];
  35.     int lar[2][8];
  36.     int lar_idx;
  37.     int msr;
  38. } GSMContext;
  39.  
  40. extern const uint16_t ff_gsm_long_term_gain_tab[4];
  41. extern const int16_t ff_gsm_dequant_tab[64][8];
  42.  
  43. #endif /* AVCODEC_GSMDEC_DATA_H */
  44.