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1/*
2 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
3 * Copyright (c) 2002-2007, Professor Benoit Macq
4 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
5 * Copyright (c) 2005, Herve Drolon, FreeImage Team
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#ifndef __RAW_H
31#define __RAW_H
32/**
33@file raw.h
34@brief Implementation of operations for raw encoding (RAW)
35
36The functions in RAW.C have for goal to realize the operation of raw encoding linked
37with the corresponding mode switch.
38*/
39
40/** @defgroup RAW RAW - Implementation of operations for raw encoding */
41/*@{*/
42
43/**
44RAW encoding operations
45*/
46typedef struct opj_raw {
47 /** temporary buffer where bits are coded or decoded */
48 unsigned char c;
49 /** number of bits already read or free to write */
50 unsigned int ct;
51 /** maximum length to decode */
52 unsigned int lenmax;
53 /** length decoded */
54 unsigned int len;
55 /** pointer to the current position in the buffer */
56 unsigned char *bp;
57 /** pointer to the start of the buffer */
58 unsigned char *start;
59 /** pointer to the end of the buffer */
60 unsigned char *end;
61} opj_raw_t;
62
63/** @name Exported functions */
64/*@{*/
65/* ----------------------------------------------------------------------- */
66/**
67Create a new RAW handle
68@return Returns a new RAW handle if successful, returns NULL otherwise
69*/
70opj_raw_t* raw_create();
71/**
72Destroy a previously created RAW handle
73@param raw RAW handle to destroy
74*/
75void raw_destroy(opj_raw_t *raw);
76/**
77Return the number of bytes written/read since initialisation
78@param raw RAW handle to destroy
79@return Returns the number of bytes already encoded
80*/
81int raw_numbytes(opj_raw_t *raw);
82/**
83Initialize the decoder
84@param raw RAW handle
85@param bp Pointer to the start of the buffer from which the bytes will be read
86@param len Length of the input buffer
87*/
88void raw_init_dec(opj_raw_t *raw, unsigned char *bp, int len);
89/**
90Decode a symbol using raw-decoder. Cfr p.506 TAUBMAN
91@param raw RAW handle
92@return Returns the decoded symbol (0 or 1)
93*/
94int raw_decode(opj_raw_t *raw);
95/* ----------------------------------------------------------------------- */
96/*@}*/
97
98/*@}*/
99
100#endif /* __RAW_H */