JasPer: jpc_tagtree.h Source File

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jpc_tagtree.h
1/*
2 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
3 * British Columbia.
4 * Copyright (c) 2001-2002 Michael David Adams.
5 * All rights reserved.
6 */
7
8/* __START_OF_JASPER_LICENSE__
9 *
10 * JasPer License Version 2.0
11 *
12 * Copyright (c) 2001-2006 Michael David Adams
13 * Copyright (c) 1999-2000 Image Power, Inc.
14 * Copyright (c) 1999-2000 The University of British Columbia
15 *
16 * All rights reserved.
17 *
18 * Permission is hereby granted, free of charge, to any person (the
19 * "User") obtaining a copy of this software and associated documentation
20 * files (the "Software"), to deal in the Software without restriction,
21 * including without limitation the rights to use, copy, modify, merge,
22 * publish, distribute, and/or sell copies of the Software, and to permit
23 * persons to whom the Software is furnished to do so, subject to the
24 * following conditions:
25 *
26 * 1. The above copyright notices and this permission notice (which
27 * includes the disclaimer below) shall be included in all copies or
28 * substantial portions of the Software.
29 *
30 * 2. The name of a copyright holder shall not be used to endorse or
31 * promote products derived from the Software without specific prior
32 * written permission.
33 *
34 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
35 * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
36 * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
37 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
38 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
39 * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
40 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
41 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
42 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
43 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
44 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
45 * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
46 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
47 * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
48 * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
49 * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
50 * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
51 * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
52 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
53 * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
54 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
55 * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
56 * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
57 * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
58 * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
59 * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
60 *
61 * __END_OF_JASPER_LICENSE__
62 */
63
64/*
65 * Tag Tree Library
66 *
67 * $Id$
68 */
69
70#ifndef JPC_TAGTREE_H
71#define JPC_TAGTREE_H
72
73/******************************************************************************\
74* Includes
75\******************************************************************************/
76
77#include <stdio.h>
78
79#include "jpc_bs.h"
80
81/******************************************************************************\
82* Constants
83\******************************************************************************/
84
85/* The maximum allowable depth for a tag tree. */
86#define JPC_TAGTREE_MAXDEPTH 32
87
88/******************************************************************************\
89* Types
90\******************************************************************************/
91
92/*
93 * Tag tree node.
94 */
95
96typedef struct jpc_tagtreenode_ {
97
98 /* The parent of this node. */
99 struct jpc_tagtreenode_ *parent_;
100
101 /* The value associated with this node. */
102 int value_;
103
104 /* The lower bound on the value associated with this node. */
105 int low_;
106
107 /* A flag indicating if the value is known exactly. */
108 int known_;
109
110} jpc_tagtreenode_t;
111
112/*
113 * Tag tree.
114 */
115
116typedef struct {
117
118 /* The number of leaves in the horizontal direction. */
119 int numleafsh_;
120
121 /* The number of leaves in the vertical direction. */
122 int numleafsv_;
123
124 /* The total number of nodes in the tree. */
125 int numnodes_;
126
127 /* The nodes. */
128 jpc_tagtreenode_t *nodes_;
129
130} jpc_tagtree_t;
131
132/******************************************************************************\
133* Functions.
134\******************************************************************************/
135
136/* Create a tag tree. */
137jpc_tagtree_t *jpc_tagtree_create(int numleafsh, int numleafsv);
138
139/* Destroy a tag tree. */
140void jpc_tagtree_destroy(jpc_tagtree_t *tree);
141
142/* Copy data from one tag tree to another. */
143void jpc_tagtree_copy(jpc_tagtree_t *dsttree, const jpc_tagtree_t *srctree);
144
145/* Reset the tag tree state. */
146void jpc_tagtree_reset(jpc_tagtree_t *tree);
147
148/* Set the value associated with a particular leaf node of a tag tree. */
149void jpc_tagtree_setvalue(jpc_tagtree_t *tree, jpc_tagtreenode_t *leaf,
150 int value);
151
152/* Get a pointer to a particular leaf node. */
153JAS_ATTRIBUTE_PURE
154jpc_tagtreenode_t *jpc_tagtree_getleaf(jpc_tagtree_t *tree, int n);
155
156/* Invoke the tag tree decoding procedure. */
157int jpc_tagtree_decode(jpc_tagtree_t *tree, jpc_tagtreenode_t *leaf,
158 int threshold, jpc_bitstream_t *in);
159
160/* Invoke the tag tree encoding procedure. */
161int jpc_tagtree_encode(jpc_tagtree_t *tree, jpc_tagtreenode_t *leaf,
162 int threshold, jpc_bitstream_t *out);
163
164/* Dump a tag tree (for debugging purposes). */
165void jpc_tagtree_dump(const jpc_tagtree_t *tree, FILE *out);
166
167#endif