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
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/**
* @file libaec.h
*
* @author Mathis Rosenhauer, Deutsches Klimarechenzentrum
* @author Moritz Hanke, Deutsches Klimarechenzentrum
* @author Joerg Behrens, Deutsches Klimarechenzentrum
* @author Luis Kornblueh, Max-Planck-Institut fuer Meteorologie
*
* @section LICENSE
* Copyright 2012
*
* Mathis Rosenhauer, Luis Kornblueh
* Moritz Hanke,
* Joerg Behrens
*
* Deutsches Klimarechenzentrum GmbH Max-Planck-Institut fuer Meteorologie
* Bundesstr. 45a Bundesstr. 53
* 20146 Hamburg 20146 Hamburg
* Germany Germany
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @section DESCRIPTION
*
* Adaptive Entropy Coding library
*
*/
#ifndef LIBAEC_H
#define LIBAEC_H
#include <stddef.h>
struct internal_state;
struct aec_stream {
const unsigned char *next_in;
size_t avail_in; /* number of bytes available at
* next_in
*/
size_t total_in; /* total number of input bytes read so
* far
*/
unsigned char *next_out;
size_t avail_out; /* remaining free space at next_out */
size_t total_out; /* total number of bytes output so far */
int bits_per_sample; /* resolution in bits per sample (n =
* 1, ..., 32)
*/
int block_size; /* block size in samples */
int rsi; /* Reference sample interval, the number
* of _blocks_ between consecutive
* reference samples (up to 4096).
*/
int flags;
struct internal_state *state;
};
/* Sample data description flags */
#define AEC_DATA_SIGNED 1 /* Samples are signed. Telling libaec
* this results in a slightly better
* compression ratio. Default is
* unsigned.
*/
#define AEC_DATA_3BYTE 2 /* 24 bit samples are coded in 3 bytes */
#define AEC_DATA_MSB 4 /* Samples are stored with their most
* significant bit first. This has
* nothing to do with the endianness
* of the host. Default is LSB.
*/
#define AEC_DATA_PREPROCESS 8 /* Set if preprocessor should be used */
#define AEC_RESTRICTED 16 /* Use restricted set of code options */
#define AEC_PAD_RSI 32 /* Pad RSI to byte boundary. Only for
* decoding CCSDS sample data. */
/* Return codes of library functions */
#define AEC_OK 0
#define AEC_CONF_ERROR (-1)
#define AEC_STREAM_ERROR (-2)
#define AEC_DATA_ERROR (-3)
#define AEC_MEM_ERROR (-4)
/* Options for flushing */
#define AEC_NO_FLUSH 0 /* Do not enforce output
* flushing. More input may be
* provided with later calls. So far
* only relevant for encoding.
*/
#define AEC_FLUSH 1 /* Flush output and end encoding. The
* last call to aec_encode() must set
* AEC_FLUSH to drain all output.
*
* It is not possible to continue
* encoding of the same stream after it
* has been flushed because the last byte
* may be padded with fill bits.
*/
/* Streaming encoding and decoding functions */
int aec_encode_init(struct aec_stream *strm);
int aec_encode(struct aec_stream *strm, int flush);
int aec_encode_end(struct aec_stream *strm);
int aec_decode_init(struct aec_stream *strm);
int aec_decode(struct aec_stream *strm, int flush);
int aec_decode_end(struct aec_stream *strm);
/* Utility functions for encoding or decoding a memory buffer. */
int aec_buffer_encode(struct aec_stream *strm);
int aec_buffer_decode(struct aec_stream *strm);
#endif /* LIBAEC_H */
|
