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/*
* Copyright (c) 2001-2003, David Janssens
* Copyright (c) 2002-2003, Yannick Verschueren
* Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
* Copyright (c) 2005, Herv Drolon, FreeImage Team
* Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
* 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 __PI_H
#define __PI_H
/**
@file pi.h
@brief Implementation of a packet iterator (PI)
The functions in PI.C have for goal to realize a packet iterator that permits to get the next
packet following the progression order and change of it. The functions in PI.C are used
by some function in T2.C.
*/
/** @defgroup PI PI - Implementation of a packet iterator */
/*@{*/
/**
FIXME: documentation
*/
typedef struct opj_pi_resolution {
int pdx, pdy;
int pw, ph;
} opj_pi_resolution_t;
/**
FIXME: documentation
*/
typedef struct opj_pi_comp {
int dx, dy;
/** number of resolution levels */
int numresolutions;
opj_pi_resolution_t *resolutions;
} opj_pi_comp_t;
/**
Packet iterator
*/
typedef struct opj_pi_iterator {
/** precise if the packet has been already used (usefull for progression order change) */
short int *include;
/** layer step used to localize the packet in the include vector */
int step_l;
/** resolution step used to localize the packet in the include vector */
int step_r;
/** component step used to localize the packet in the include vector */
int step_c;
/** precinct step used to localize the packet in the include vector */
int step_p;
/** component that identify the packet */
int compno;
/** resolution that identify the packet */
int resno;
/** precinct that identify the packet */
int precno;
/** layer that identify the packet */
int layno;
/** 0 if the first packet */
int first;
/** progression order change information */
opj_poc_t poc;
/** */
int numcomps;
/** */
opj_pi_comp_t *comps;
int tx0, ty0, tx1, ty1;
int x, y, dx, dy;
} opj_pi_iterator_t;
/** @name Exported functions */
/*@{*/
/* ----------------------------------------------------------------------- */
/**
Create a packet iterator
@param image Raw image for which the packets will be listed
@param cp Coding parameters
@param tileno Number that identifies the tile for which to list the packets
@return Returns a packet iterator that points to the first packet of the tile
@see pi_destroy
*/
opj_pi_iterator_t *pi_create(opj_image_t * image, opj_cp_t * cp, int tileno);
/**
Destroy a packet iterator
@param pi Previously created packet iterator
@param cp Coding parameters
@param tileno Number that identifies the tile for which the packets were listed
@see pi_create
*/
void pi_destroy(opj_pi_iterator_t *pi, opj_cp_t *cp, int tileno);
/**
Modify the packet iterator to point to the next packet
@param pi Packet iterator to modify
@return Returns false if pi pointed to the last packet or else returns true
*/
bool pi_next(opj_pi_iterator_t * pi);
/* ----------------------------------------------------------------------- */
/*@}*/
/*@}*/
#endif /* __PI_H */
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