3 * Copyright (c) 2003 Fabrice Bellard
4 * Copyright (c) 2006 Konstantin Shishkov
6 * This file is part of FFmpeg.
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.
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.
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
25 * @brief LZW decoding routines
26 * @author Fabrice Bellard
27 * @author modified for use in TIFF by Konstantin Shishkov
42 /* clients should not know what LZWState is */
43 typedef void LZWState
;
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
);
52 /** LZW encode state */
53 struct LZWEncodeState
;
54 extern const int ff_lzw_encode_state_size
;
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
*));
63 #endif /* AVCODEC_LZW_H */