mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/*
|
|
* LZW decoder
|
|
* Copyright (c) 2003 Fabrice Bellard
|
|
* Copyright (c) 2006 Konstantin Shishkov
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; 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
|
|
* 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);
|
|
const uint8_t* ff_lzw_cur_ptr(LZWState *lzw);
|
|
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 *));
|
|
|
|
#endif /* AVCODEC_LZW_H */
|