Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / lzw.h
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
25 * @brief LZW decoding routines
26 * @author Fabrice Bellard
27 * @author modified for use in TIFF by Konstantin Shishkov
28 */
29
30 #ifndef AVCODEC_LZW_H
31 #define AVCODEC_LZW_H
32
33 #include <stdint.h>
34
35 struct PutBitContext;
36
37 enum FF_LZW_MODES{
38 FF_LZW_GIF,
39 FF_LZW_TIFF
40 };
41
42 /* clients should not know what LZWState is */
43 typedef void LZWState;
44
45 /* first two functions de/allocate memory for LZWState */
46 void ff_lzw_decode_open(LZWState **p);
47 void ff_lzw_decode_close(LZWState **p);
48 int ff_lzw_decode_init(LZWState *s, int csize, const uint8_t *buf, int buf_size, int mode);
49 int ff_lzw_decode(LZWState *s, uint8_t *buf, int len);
50 void ff_lzw_decode_tail(LZWState *lzw);
51
52 /** LZW encode state */
53 struct LZWEncodeState;
54 extern const int ff_lzw_encode_state_size;
55
56 void ff_lzw_encode_init(struct LZWEncodeState *s, uint8_t *outbuf, int outsize,
57 int maxbits, enum FF_LZW_MODES mode,
58 void (*lzw_put_bits)(struct PutBitContext *, int, unsigned int));
59 int ff_lzw_encode(struct LZWEncodeState * s, const uint8_t * inbuf, int insize);
60 int ff_lzw_encode_flush(struct LZWEncodeState *s,
61 void (*lzw_flush_put_bits)(struct PutBitContext *));
62
63 #endif /* AVCODEC_LZW_H */