openjpeg/jpwl/decoder_02/libopenjpeg/tgt.h

88 lines
2.7 KiB
C

/*
* Copyright (c) 2001-2002, David Janssens
* 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 OWNER 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.
*/
#ifndef __TGT_H
#define __TGT_H
typedef struct tgt_node {
struct tgt_node *parent;
int value;
int low;
int known;
} tgt_node_t;
typedef struct {
int numleafsh;
int numleafsv;
int numnodes;
tgt_node_t *nodes;
} tgt_tree_t;
/*
* Reset a tag-tree (set all leaves to 0)
* tree: tag-tree to reset
*/
void tgt_reset(tgt_tree_t * tree);
/*
* Create a tag-tree
* numleafsh: width of the array of leafs of the tree
* numleafsv: height of the array of leafs of the tree
*/
tgt_tree_t *tgt_create(int numleafsh, int numleafsv);
/*
* Destroy a tag-tree, liberating memory
* tree: tag-tree to destroy
*/
void tgt_destroy(tgt_tree_t * tree);
/*
* Set the value of a leaf of a tag-tree
* tree: tag-tree to modify
* leafno: number that identifies the leaf to modify
* value: new value of the leaf
*/
void tgt_setvalue(tgt_tree_t * tree, int leafno, int value);
/*
* Encode the value of a leaf of the tag-tree up to a given threshold
* leafno: number that identifies the leaf to encode
* threshold: threshold to use when encoding value of the leaf
*/
void tgt_encode(tgt_tree_t * tree, int leafno, int threshold);
/*
* Decode the value of a leaf of the tag-tree up to a given threshold
* leafno: number that identifies the leaf to decode
* threshold: threshold to use when decoding value of the leaf
*/
int tgt_decode(tgt_tree_t * tree, int leafno, int threshold);
#endif