FFmpeg
lzw.h
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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 
40 };
41 
42 /* clients should not know what LZWState is */
43 typedef void LZWState;
44 
45 /* first two functions de/allocate memory for LZWState */
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);
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);
61  void (*lzw_flush_put_bits)(struct PutBitContext *));
62 
63 #endif /* AVCODEC_LZW_H */
void LZWState
Definition: lzw.h:43
int ff_lzw_decode_tail(LZWState *lzw)
Definition: lzw.c:99
int ff_lzw_encode(struct LZWEncodeState *s, const uint8_t *inbuf, int insize)
LZW main compress function.
Definition: lzwenc.c:227
int maxbits
Max bits code.
Definition: lzwenc.c:58
uint8_t
LZW encode state.
Definition: lzwenc.c:50
int ff_lzw_encode_flush(struct LZWEncodeState *s, void(*lzw_flush_put_bits)(struct PutBitContext *))
Definition: lzw.c:46
void ff_lzw_decode_close(LZWState **p)
Definition: lzw.c:118
Definition: lzw.h:38
#define s(width, name)
Definition: cbs_vp9.c:257
void ff_lzw_decode_open(LZWState **p)
Definition: lzw.c:113
void * buf
Definition: avisynth_c.h:766
int ff_lzw_decode(LZWState *s, uint8_t *buf, int len)
Decode given number of bytes NOTE: the algorithm here is inspired from the LZW GIF decoder written by...
Definition: lzw.c:169
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 len
FF_LZW_MODES
Definition: lzw.h:37
const int ff_lzw_encode_state_size
Definition: lzwenc.c:67
int ff_lzw_decode_init(LZWState *s, int csize, const uint8_t *buf, int buf_size, int mode)
Initialize LZW decoder.
Definition: lzw.c:131
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83