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LZW decoding routines. More...
#include <stdint.h>
Go to the source code of this file.
Typedefs | |
typedef void | LZWState |
Enumerations | |
enum | FF_LZW_MODES { FF_LZW_GIF, FF_LZW_TIFF } |
Functions | |
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) |
Initialize LZW decoder. More... | |
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 Steven A. More... | |
void | ff_lzw_decode_tail (LZWState *lzw) |
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) |
LZW main compress function. More... | |
int | ff_lzw_encode_flush (struct LZWEncodeState *s, void(*lzw_flush_put_bits)(struct PutBitContext *)) |
Variables | |
const int | ff_lzw_encode_state_size |
Detailed Description
LZW decoding routines.
Definition in file lzw.h.
Typedef Documentation
Enumeration Type Documentation
enum FF_LZW_MODES |
Function Documentation
Decode given number of bytes NOTE: the algorithm here is inspired from the LZW GIF decoder written by Steven A.
Bennett in 1987.
- Parameters
-
p LZW context buf output buffer len number of bytes to decode
- Returns
- number of bytes decoded
Definition at line 170 of file lzw.c.
Referenced by gif_read_image(), and tiff_unpack_strip().
Definition at line 118 of file lzw.c.
Referenced by gif_decode_close(), and tiff_end().
Initialize LZW decoder.
- Parameters
-
p LZW context csize initial code size in bits buf input data buf_size input data size mode decoder working mode - either GIF or TIFF
Definition at line 131 of file lzw.c.
Referenced by gif_read_image(), and tiff_unpack_strip().
Definition at line 113 of file lzw.c.
Referenced by gif_decode_init(), and tiff_init().
Definition at line 95 of file lzw.c.
Referenced by gif_read_image().
int ff_lzw_encode | ( | LZWEncodeState * | s, |
const uint8_t * | inbuf, | ||
int | insize | ||
) |
LZW main compress function.
- Parameters
-
s LZW state inbuf Input buffer insize Size of input buffer
- Returns
- Number of bytes written or -1 on error
Definition at line 226 of file lzwenc.c.
Referenced by encode_strip(), and gif_image_write_image().
int ff_lzw_encode_flush | ( | struct LZWEncodeState * | s, |
void(*)(struct PutBitContext *) | lzw_flush_put_bits | ||
) |
Referenced by encode_frame(), and gif_image_write_image().
void ff_lzw_encode_init | ( | struct LZWEncodeState * | s, |
uint8_t * | outbuf, | ||
int | outsize, | ||
int | maxbits, | ||
enum FF_LZW_MODES | mode, | ||
void(*)(struct PutBitContext *, int, unsigned int) | lzw_put_bits | ||
) |
Referenced by encode_frame(), and gif_image_write_image().
Variable Documentation
const int ff_lzw_encode_state_size |
Definition at line 66 of file lzwenc.c.
Referenced by encode_frame(), and gif_encode_init().
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