1/*
2 * LZW decoder
3 * Copyright (c) 2003 Fabrice Bellard
4 * Copyright (c) 2006 Konstantin Shishkov
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23/**
24 * @file libavcodec/lzw.h
25 * @brief LZW decoding routines
26 * @author Fabrice Bellard
27 * Modified for use in TIFF by Konstantin Shishkov
28 */
29
30#ifndef AVCODEC_LZW_H
31#define AVCODEC_LZW_H
32
33#include "bitstream.h"
34
35enum FF_LZW_MODES{
36    FF_LZW_GIF,
37    FF_LZW_TIFF
38};
39
40/* clients should not know what LZWState is */
41typedef void LZWState;
42
43/* first two functions de/allocate memory for LZWState */
44void ff_lzw_decode_open(LZWState **p);
45void ff_lzw_decode_close(LZWState **p);
46int ff_lzw_decode_init(LZWState *s, int csize, const uint8_t *buf, int buf_size, int mode);
47int ff_lzw_decode(LZWState *s, uint8_t *buf, int len);
48const uint8_t* ff_lzw_cur_ptr(LZWState *lzw);
49void ff_lzw_decode_tail(LZWState *lzw);
50
51/** LZW encode state */
52struct LZWEncodeState;
53extern const int ff_lzw_encode_state_size;
54
55void ff_lzw_encode_init(struct LZWEncodeState * s, uint8_t * outbuf, int outsize, int maxbits);
56int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize);
57int ff_lzw_encode_flush(struct LZWEncodeState * s);
58
59#endif /* AVCODEC_LZW_H */
60