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libavcodec/cabac.h

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00001 /*
00002  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
00003  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
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 
00027 #ifndef AVCODEC_CABAC_H
00028 #define AVCODEC_CABAC_H
00029 
00030 #include <stdint.h>
00031 
00032 #include "put_bits.h"
00033 
00034 #define CABAC_BITS 16
00035 #define CABAC_MASK ((1<<CABAC_BITS)-1)
00036 
00037 typedef struct CABACContext{
00038     int low;
00039     int range;
00040     int outstanding_count;
00041     const uint8_t *bytestream_start;
00042     const uint8_t *bytestream;
00043     const uint8_t *bytestream_end;
00044     PutBitContext pb;
00045 }CABACContext;
00046 
00047 void ff_init_cabac_encoder(CABACContext *c, uint8_t *buf, int buf_size);
00048 void ff_init_cabac_decoder(CABACContext *c, const uint8_t *buf, int buf_size);
00049 void ff_init_cabac_states(CABACContext *c);
00050 
00051 #endif /* AVCODEC_CABAC_H */
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