1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/***************************************************************************
huffman.h
Huffman compression routines.
Copyright Nicola Salmoria and the MAME Team.
Visit http://mamedev.org for licensing and usage restrictions.
***************************************************************************/
#ifndef __HUFFMAN_H__
#include "osdcore.h"
/***************************************************************************
CONSTANTS
***************************************************************************/
enum _huffman_error
{
HUFFERR_NONE = 0,
HUFFERR_OUT_OF_MEMORY,
HUFFERR_TOO_MANY_BITS,
HUFFERR_INVALID_DATA,
HUFFERR_INPUT_BUFFER_TOO_SMALL,
HUFFERR_OUTPUT_BUFFER_TOO_SMALL,
HUFFERR_INTERNAL_INCONSISTENCY
};
typedef enum _huffman_error huffman_error;
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
typedef UINT16 huffman_lookup_value;
typedef struct _huffman_context huffman_context;
/***************************************************************************
FUNCTION PROTOTYPES
***************************************************************************/
huffman_error huffman_create_context(huffman_context **context, int maxbits);
void huffman_free_context(huffman_context *context);
huffman_error huffman_compute_tree(huffman_context *context, const UINT8 *source, UINT32 slength, UINT32 sstride);
huffman_error huffman_import_tree(huffman_context *context, const UINT8 *source, UINT32 slength, UINT32 *actlength);
huffman_error huffman_export_tree(huffman_context *context, UINT8 *dest, UINT32 dlength, UINT32 *actlength);
huffman_error huffman_get_lookup_table(huffman_context *context, const huffman_lookup_value **table);
huffman_error huffman_encode_data(huffman_context *context, const UINT8 *source, UINT32 slength, UINT8 *dest, UINT32 dlength, UINT32 *actlength);
huffman_error huffman_encode_data_interleaved_2(huffman_context *context1, huffman_context *context2, const UINT8 *source, UINT32 slength, UINT8 *dest, UINT32 dlength, UINT32 *actlength);
huffman_error huffman_decode_data(huffman_context *context, const UINT8 *source, UINT32 slength, UINT8 *dest, UINT32 dlength, UINT32 *actlength);
huffman_error huffman_decode_data_interleaved_2(huffman_context *context1, huffman_context *context2, const UINT8 *source, UINT32 slength, UINT8 *dest, UINT32 dlength, UINT32 *actlength);
#endif
|