libavcodec/gsmdec_data.h

   1 /*
   2  * gsm 06.10 decoder data
   3  * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav 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  * Libav 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 Libav; 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
  23 #define AVCODEC_GSMDEC_DATA
  24
  25 #include <stdint.h>
  26 #include "avcodec.h"
  27
  28 typedef struct {
  29     AVFrame frame;
  30     // Contains first 120 elements from the previous frame
  31     // (used by long_term_synth according to the "lag"),
  32     // then in the following 160 elements the current
  33     // frame is constructed.
  34     int16_t ref_buf[280];
  35     int v[9];
  36     int lar[2][8];
  37     int lar_idx;
  38     int msr;
  39 } GSMContext;
  40
  41 extern const uint16_t ff_gsm_long_term_gain_tab[4];
  42 extern const int16_t ff_gsm_dequant_tab[64][8];
  43
  44 #endif /* AVCODEC_GSMDEC_DATA */