Libav 0.7.1
libavcodec/gsmdec_data.h
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00001 /*
00002  * gsm 06.10 decoder data
00003  * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
00004  *
00005  * This file is part of Libav.
00006  *
00007  * Libav 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  * Libav 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 Libav; 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 */