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 uint8_t ff_gsm_requant_tab[4][8]; 42 extern const int16_t ff_gsm_dequant_tab[64][8]; 43 44 extern const int* const ff_gsm_apcm_bits[][4]; 45 46 #endif /* AVCODEC_GSMDEC_DATA_H */ 47