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 00027 // input and output sizes in byte 00028 #define GSM_BLOCK_SIZE 33 00029 #define GSM_MS_BLOCK_SIZE 65 00030 #define GSM_FRAME_SIZE 160 00031 00032 typedef struct { 00033 // Contains first 120 elements from the previous frame 00034 // (used by long_term_synth according to the "lag"), 00035 // then in the following 160 elements the current 00036 // frame is constructed. 00037 int16_t ref_buf[280]; 00038 int v[9]; 00039 int lar[2][8]; 00040 int lar_idx; 00041 int msr; 00042 } GSMContext; 00043 00044 extern const uint16_t ff_gsm_long_term_gain_tab[4]; 00045 extern const int16_t ff_gsm_dequant_tab[64][8]; 00046 00047 #endif /* AVCODEC_GSMDEC_DATA */
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