115 lines
3.9 KiB
C
115 lines
3.9 KiB
C
/*
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* Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2007, Professor Benoit Macq
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* Copyright (c) 2001-2003, David Janssens
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* Copyright (c) 2002-2003, Yannick Verschueren
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* Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
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* Copyright (c) 2005, Herve Drolon, FreeImage Team
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __TGT_H
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#define __TGT_H
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/**
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@file tgt.h
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@brief Implementation of a tag-tree coder (TGT)
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The functions in TGT.C have for goal to realize a tag-tree coder. The functions in TGT.C
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are used by some function in T2.C.
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*/
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/** @defgroup TGT TGT - Implementation of a tag-tree coder */
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/*@{*/
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/**
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Tag node
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*/
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typedef struct opj_tgt_node {
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struct opj_tgt_node *parent;
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int value;
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int low;
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int known;
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} opj_tgt_node_t;
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/**
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Tag tree
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*/
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typedef struct opj_tgt_tree {
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int numleafsh;
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int numleafsv;
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int numnodes;
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opj_tgt_node_t *nodes;
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} opj_tgt_tree_t;
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/** @name Exported functions */
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/*@{*/
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/* ----------------------------------------------------------------------- */
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/**
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Create a tag-tree
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@param numleafsh Width of the array of leafs of the tree
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@param numleafsv Height of the array of leafs of the tree
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@return Returns a new tag-tree if successful, returns NULL otherwise
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*/
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opj_tgt_tree_t *tgt_create(int numleafsh, int numleafsv);
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/**
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Destroy a tag-tree, liberating memory
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@param tree Tag-tree to destroy
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*/
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void tgt_destroy(opj_tgt_tree_t *tree);
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/**
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Reset a tag-tree (set all leaves to 0)
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@param tree Tag-tree to reset
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*/
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void tgt_reset(opj_tgt_tree_t *tree);
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/**
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Set the value of a leaf of a tag-tree
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@param tree Tag-tree to modify
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@param leafno Number that identifies the leaf to modify
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@param value New value of the leaf
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*/
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void tgt_setvalue(opj_tgt_tree_t *tree, int leafno, int value);
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/**
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Encode the value of a leaf of the tag-tree up to a given threshold
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@param bio Pointer to a BIO handle
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@param tree Tag-tree to modify
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@param leafno Number that identifies the leaf to encode
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@param threshold Threshold to use when encoding value of the leaf
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*/
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void tgt_encode(opj_bio_t *bio, opj_tgt_tree_t *tree, int leafno, int threshold);
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/**
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Decode the value of a leaf of the tag-tree up to a given threshold
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@param bio Pointer to a BIO handle
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@param tree Tag-tree to decode
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@param leafno Number that identifies the leaf to decode
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@param threshold Threshold to use when decoding value of the leaf
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@return Returns 1 if the node's value < threshold, returns 0 otherwise
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*/
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int tgt_decode(opj_bio_t *bio, opj_tgt_tree_t *tree, int leafno, int threshold);
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/* ----------------------------------------------------------------------- */
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/*@}*/
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/*@}*/
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#endif /* __TGT_H */
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