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/*
* The copyright in this software is being made available under the 2-clauses
* BSD License, included below. This software may be subject to other third
* party and contributor rights, including patent rights, and no such rights
* are granted under this license.
*
* Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
* Copyright (c) 2002-2014, Professor Benoit Macq
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
* Copyright (c) 2003-2007, Francois-Olivier Devaux
* Copyright (c) 2003-2014, Antonin Descampe
* Copyright (c) 2005, Herve Drolon, FreeImage Team
* Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
* Copyright (c) 2011-2012, Centre National d'Etudes Spatiales (CNES), France
* Copyright (c) 2012, CS Systemes d'Information, France
* 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
/**
@file tgt.h
@brief Implementation of a tag-tree coder (TGT)
The functions in TGT.C have for goal to realize a tag-tree coder. The functions in TGT.C
are used by some function in T2.C.
*/
/** @defgroup TGT TGT - Implementation of a tag-tree coder */
/*@{*/
/**
Tag node
*/
typedef struct opj_tgt_node {
struct opj_tgt_node *parent;
OPJ_INT32 value;
OPJ_INT32 low;
OPJ_UINT32 known;
} opj_tgt_node_t;
/**
Tag tree
*/
typedef struct opj_tgt_tree
{
OPJ_UINT32 numleafsh;
OPJ_UINT32 numleafsv;
OPJ_UINT32 numnodes;
opj_tgt_node_t *nodes;
OPJ_UINT32 nodes_size; /* maximum size taken by nodes */
} opj_tgt_tree_t;
/** @name Exported functions */
/*@{*/
/* ----------------------------------------------------------------------- */
/**
Create a tag-tree
@param numleafsh Width of the array of leafs of the tree
@param numleafsv Height of the array of leafs of the tree
@return Returns a new tag-tree if successful, returns NULL otherwise
*/
opj_tgt_tree_t *opj_tgt_create(OPJ_UINT32 numleafsh, OPJ_UINT32 numleafsv, opj_event_mgr_t *manager);
/**
* Reinitialises a tag-tree from an exixting one.
*
* @param p_tree the tree to reinitialize.
* @param p_num_leafs_h the width of the array of leafs of the tree
* @param p_num_leafs_v the height of the array of leafs of the tree
* @param p_manager the event manager
* @return a new tag-tree if successful, NULL otherwise
*/
opj_tgt_tree_t *opj_tgt_init(opj_tgt_tree_t * p_tree,
OPJ_UINT32 p_num_leafs_h,
OPJ_UINT32 p_num_leafs_v, opj_event_mgr_t *p_manager);
/**
Destroy a tag-tree, liberating memory
@param tree Tag-tree to destroy
*/
void opj_tgt_destroy(opj_tgt_tree_t *tree);
/**
Reset a tag-tree (set all leaves to 0)
@param tree Tag-tree to reset
*/
void opj_tgt_reset(opj_tgt_tree_t *tree);
/**
Set the value of a leaf of a tag-tree
@param tree Tag-tree to modify
@param leafno Number that identifies the leaf to modify
@param value New value of the leaf
*/
void opj_tgt_setvalue(opj_tgt_tree_t *tree,
OPJ_UINT32 leafno,
OPJ_INT32 value);
/**
Encode the value of a leaf of the tag-tree up to a given threshold
@param bio Pointer to a BIO handle
@param tree Tag-tree to modify
@param leafno Number that identifies the leaf to encode
@param threshold Threshold to use when encoding value of the leaf
*/
void opj_tgt_encode(opj_bio_t *bio,
opj_tgt_tree_t *tree,
OPJ_UINT32 leafno,
OPJ_INT32 threshold);
/**
Decode the value of a leaf of the tag-tree up to a given threshold
@param bio Pointer to a BIO handle
@param tree Tag-tree to decode
@param leafno Number that identifies the leaf to decode
@param threshold Threshold to use when decoding value of the leaf
@return Returns 1 if the node's value < threshold, returns 0 otherwise
*/
OPJ_UINT32 opj_tgt_decode(opj_bio_t *bio,
opj_tgt_tree_t *tree,
OPJ_UINT32 leafno,
OPJ_INT32 threshold);
/* ----------------------------------------------------------------------- */
/*@}*/
/*@}*/
#endif /* __TGT_H */
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