0,0 → 1,63 |
/* |
* LZW decoder |
* Copyright (c) 2003 Fabrice Bellard |
* Copyright (c) 2006 Konstantin Shishkov |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
/** |
* @file |
* @brief LZW decoding routines |
* @author Fabrice Bellard |
* @author modified for use in TIFF by Konstantin Shishkov |
*/ |
|
#ifndef AVCODEC_LZW_H |
#define AVCODEC_LZW_H |
|
#include <stdint.h> |
|
struct PutBitContext; |
|
enum FF_LZW_MODES{ |
FF_LZW_GIF, |
FF_LZW_TIFF |
}; |
|
/* clients should not know what LZWState is */ |
typedef void LZWState; |
|
/* first two functions de/allocate memory for LZWState */ |
void ff_lzw_decode_open(LZWState **p); |
void ff_lzw_decode_close(LZWState **p); |
int ff_lzw_decode_init(LZWState *s, int csize, const uint8_t *buf, int buf_size, int mode); |
int ff_lzw_decode(LZWState *s, uint8_t *buf, int len); |
void ff_lzw_decode_tail(LZWState *lzw); |
|
/** LZW encode state */ |
struct LZWEncodeState; |
extern const int ff_lzw_encode_state_size; |
|
void ff_lzw_encode_init(struct LZWEncodeState *s, uint8_t *outbuf, int outsize, |
int maxbits, enum FF_LZW_MODES mode, |
void (*lzw_put_bits)(struct PutBitContext *, int, unsigned int)); |
int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize); |
int ff_lzw_encode_flush(struct LZWEncodeState *s, |
void (*lzw_flush_put_bits)(struct PutBitContext *)); |
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#endif /* AVCODEC_LZW_H */ |