00001 /* 00002 * gsm 06.10 decoder data 00003 * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de> 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #ifndef AVCODEC_GSMDEC_DATA 00023 #define AVCODEC_GSMDEC_DATA 00024 00025 #include <stdint.h> 00026 #include "avcodec.h" 00027 00028 // input and output sizes in byte 00029 #define GSM_BLOCK_SIZE 33 00030 #define GSM_MS_BLOCK_SIZE 65 00031 #define GSM_FRAME_SIZE 160 00032 00033 typedef struct { 00034 AVFrame frame; 00035 // Contains first 120 elements from the previous frame 00036 // (used by long_term_synth according to the "lag"), 00037 // then in the following 160 elements the current 00038 // frame is constructed. 00039 int16_t ref_buf[280]; 00040 int v[9]; 00041 int lar[2][8]; 00042 int lar_idx; 00043 int msr; 00044 } GSMContext; 00045 00046 extern const uint16_t ff_gsm_long_term_gain_tab[4]; 00047 extern const int16_t ff_gsm_dequant_tab[64][8]; 00048 00049 #endif /* AVCODEC_GSMDEC_DATA */
1.5.8