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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) 2001-2003, David Janssens
5 * Copyright (c) 2002-2003, Yannick Verschueren
6 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
7 * Copyright (c) 2005, Herve Drolon, FreeImage Team
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef __TGT_H
33#define __TGT_H
34/**
35@file tgt.h
36@brief Implementation of a tag-tree coder (TGT)
37
38The functions in TGT.C have for goal to realize a tag-tree coder. The functions in TGT.C
39are used by some function in T2.C.
40*/
41
42/** @defgroup TGT TGT - Implementation of a tag-tree coder */
43/*@{*/
44
45/**
46Tag node
47*/
48typedef struct opj_tgt_node {
49 struct opj_tgt_node *parent;
50 int value;
51 int low;
52 int known;
53} opj_tgt_node_t;
54
55/**
56Tag tree
57*/
58typedef struct opj_tgt_tree {
59 int numleafsh;
60 int numleafsv;
61 int numnodes;
62 opj_tgt_node_t *nodes;
63} opj_tgt_tree_t;
64
65/** @name Exported functions */
66/*@{*/
67/* ----------------------------------------------------------------------- */
68/**
69Create a tag-tree
70@param numleafsh Width of the array of leafs of the tree
71@param numleafsv Height of the array of leafs of the tree
72@return Returns a new tag-tree if successful, returns NULL otherwise
73*/
74opj_tgt_tree_t *tgt_create(int numleafsh, int numleafsv);
75/**
76Destroy a tag-tree, liberating memory
77@param tree Tag-tree to destroy
78*/
79void tgt_destroy(opj_tgt_tree_t *tree);
80/**
81Reset a tag-tree (set all leaves to 0)
82@param tree Tag-tree to reset
83*/
84void tgt_reset(opj_tgt_tree_t *tree);
85/**
86Set the value of a leaf of a tag-tree
87@param tree Tag-tree to modify
88@param leafno Number that identifies the leaf to modify
89@param value New value of the leaf
90*/
91void tgt_setvalue(opj_tgt_tree_t *tree, int leafno, int value);
92/**
93Encode the value of a leaf of the tag-tree up to a given threshold
94@param bio Pointer to a BIO handle
95@param tree Tag-tree to modify
96@param leafno Number that identifies the leaf to encode
97@param threshold Threshold to use when encoding value of the leaf
98*/
99void tgt_encode(opj_bio_t *bio, opj_tgt_tree_t *tree, int leafno, int threshold);
100/**
101Decode the value of a leaf of the tag-tree up to a given threshold
102@param bio Pointer to a BIO handle
103@param tree Tag-tree to decode
104@param leafno Number that identifies the leaf to decode
105@param threshold Threshold to use when decoding value of the leaf
106@return Returns 1 if the node's value < threshold, returns 0 otherwise
107*/
108int tgt_decode(opj_bio_t *bio, opj_tgt_tree_t *tree, int leafno, int threshold);
109/* ----------------------------------------------------------------------- */
110/*@}*/
111
112/*@}*/
113
114#endif /* __TGT_H */