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+/*
+ * Copyright (c) 1999-2000 Image Power, Inc. and the University of
+ *   British Columbia.
+ * Copyright (c) 2001-2002 Michael David Adams.
+ * All rights reserved.
+ */
+
+/* __START_OF_JASPER_LICENSE__
+ * 
+ * JasPer Software License
+ * 
+ * IMAGE POWER JPEG-2000 PUBLIC LICENSE
+ * ************************************
+ * 
+ * GRANT:
+ * 
+ * Permission is hereby granted, free of charge, to any person (the "User")
+ * obtaining a copy of this software and associated documentation, to deal
+ * in the JasPer Software without restriction, including without limitation
+ * the right to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the JasPer Software (in source and binary forms),
+ * and to permit persons to whom the JasPer Software is furnished to do so,
+ * provided further that the License Conditions below are met.
+ * 
+ * License Conditions
+ * ******************
+ * 
+ * A.  Redistributions of source code must retain the above copyright notice,
+ * and this list of conditions, and the following disclaimer.
+ * 
+ * B.  Redistributions in binary form must reproduce the above copyright
+ * notice, and this list of conditions, and the following disclaimer in
+ * the documentation and/or other materials provided with the distribution.
+ * 
+ * C.  Neither the name of Image Power, Inc. nor any other contributor
+ * (including, but not limited to, the University of British Columbia and
+ * Michael David Adams) may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * 
+ * D.  User agrees that it shall not commence any action against Image Power,
+ * Inc., the University of British Columbia, Michael David Adams, or any
+ * other contributors (collectively "Licensors") for infringement of any
+ * intellectual property rights ("IPR") held by the User in respect of any
+ * technology that User owns or has a right to license or sublicense and
+ * which is an element required in order to claim compliance with ISO/IEC
+ * 15444-1 (i.e., JPEG-2000 Part 1).  "IPR" means all intellectual property
+ * rights worldwide arising under statutory or common law, and whether
+ * or not perfected, including, without limitation, all (i) patents and
+ * patent applications owned or licensable by User; (ii) rights associated
+ * with works of authorship including copyrights, copyright applications,
+ * copyright registrations, mask work rights, mask work applications,
+ * mask work registrations; (iii) rights relating to the protection of
+ * trade secrets and confidential information; (iv) any right analogous
+ * to those set forth in subsections (i), (ii), or (iii) and any other
+ * proprietary rights relating to intangible property (other than trademark,
+ * trade dress, or service mark rights); and (v) divisions, continuations,
+ * renewals, reissues and extensions of the foregoing (as and to the extent
+ * applicable) now existing, hereafter filed, issued or acquired.
+ * 
+ * E.  If User commences an infringement action against any Licensor(s) then
+ * such Licensor(s) shall have the right to terminate User's license and
+ * all sublicenses that have been granted hereunder by User to other parties.
+ * 
+ * F.  This software is for use only in hardware or software products that
+ * are compliant with ISO/IEC 15444-1 (i.e., JPEG-2000 Part 1).  No license
+ * or right to this Software is granted for products that do not comply
+ * with ISO/IEC 15444-1.  The JPEG-2000 Part 1 standard can be purchased
+ * from the ISO.
+ * 
+ * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE.
+ * NO USE OF THE JASPER SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
+ * THIS DISCLAIMER.  THE JASPER SOFTWARE IS PROVIDED BY THE LICENSORS AND
+ * CONTRIBUTORS UNDER THIS LICENSE ON AN ``AS-IS'' BASIS, WITHOUT WARRANTY
+ * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION,
+ * WARRANTIES THAT THE JASPER SOFTWARE IS FREE OF DEFECTS, IS MERCHANTABLE,
+ * IS FIT FOR A PARTICULAR PURPOSE OR IS NON-INFRINGING.  THOSE INTENDING
+ * TO USE THE JASPER SOFTWARE OR MODIFICATIONS THEREOF FOR USE IN HARDWARE
+ * OR SOFTWARE PRODUCTS ARE ADVISED THAT THEIR USE MAY INFRINGE EXISTING
+ * PATENTS, COPYRIGHTS, TRADEMARKS, OR OTHER INTELLECTUAL PROPERTY RIGHTS.
+ * THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE JASPER SOFTWARE
+ * IS WITH THE USER.  SHOULD ANY PART OF THE JASPER SOFTWARE PROVE DEFECTIVE
+ * IN ANY RESPECT, THE USER (AND NOT THE INITIAL DEVELOPERS, THE UNIVERSITY
+ * OF BRITISH COLUMBIA, IMAGE POWER, INC., MICHAEL DAVID ADAMS, OR ANY
+ * OTHER CONTRIBUTOR) SHALL ASSUME THE COST OF ANY NECESSARY SERVICING,
+ * REPAIR OR CORRECTION.  UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY,
+ * WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL THE
+ * INITIAL DEVELOPER, THE UNIVERSITY OF BRITISH COLUMBIA, IMAGE POWER, INC.,
+ * MICHAEL DAVID ADAMS, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF THE
+ * JASPER SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO
+ * THE USER OR ANY OTHER PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
+ * CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION,
+ * DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR
+ * MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES, EVEN IF
+ * SUCH PARTY HAD BEEN INFORMED, OR OUGHT TO HAVE KNOWN, OF THE POSSIBILITY
+ * OF SUCH DAMAGES.  THE JASPER SOFTWARE AND UNDERLYING TECHNOLOGY ARE NOT
+ * FAULT-TOLERANT AND ARE NOT DESIGNED, MANUFACTURED OR INTENDED FOR USE OR
+ * RESALE AS ON-LINE CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING
+ * FAIL-SAFE PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES,
+ * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT
+ * LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
+ * JASPER SOFTWARE OR UNDERLYING TECHNOLOGY OR PRODUCT COULD LEAD DIRECTLY
+ * TO DEATH, PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE
+ * ("HIGH RISK ACTIVITIES").  LICENSOR SPECIFICALLY DISCLAIMS ANY EXPRESS
+ * OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.  USER WILL NOT
+ * KNOWINGLY USE, DISTRIBUTE OR RESELL THE JASPER SOFTWARE OR UNDERLYING
+ * TECHNOLOGY OR PRODUCTS FOR HIGH RISK ACTIVITIES AND WILL ENSURE THAT ITS
+ * CUSTOMERS AND END-USERS OF ITS PRODUCTS ARE PROVIDED WITH A COPY OF THE
+ * NOTICE SPECIFIED IN THIS SECTION.
+ * 
+ * __END_OF_JASPER_LICENSE__
+ */
+
+/*
+ * Tier-2 Coding Library
+ *
+ * $Id$
+ */
+
+#ifndef JPC_T2COD_H
+#define	JPC_T2COD_H
+
+/******************************************************************************\
+* Includes.
+\******************************************************************************/
+
+#include "jpc_cs.h"
+
+/******************************************************************************\
+* Types.
+\******************************************************************************/
+
+/* Progression change list. */
+
+typedef struct {
+
+	/* The number of progression changes. */
+	int numpchgs;
+
+	/* The maximum number of progression changes that can be accomodated
+	  without growing the progression change array. */
+	int maxpchgs;
+
+	/* The progression changes. */
+	jpc_pchg_t **pchgs;
+
+} jpc_pchglist_t;
+
+/* Packet iterator per-resolution-level information. */
+
+typedef struct {
+
+	/* The number of precincts. */
+	int numprcs;
+
+	/* The last layer processed for each precinct. */
+	int *prclyrnos;
+
+	/* The precinct width exponent. */
+	int prcwidthexpn;
+
+	/* The precinct height exponent. */
+	int prcheightexpn;
+
+	/* The number of precincts spanning the resolution level in the horizontal
+	  direction. */
+	int numhprcs;
+
+} jpc_pirlvl_t;
+
+/* Packet iterator per-component information. */
+
+typedef struct {
+
+	/* The number of resolution levels. */
+	int numrlvls;
+
+	/* The per-resolution-level information. */
+	jpc_pirlvl_t *pirlvls;
+
+	/* The horizontal sampling period. */
+	int hsamp;
+
+	/* The vertical sampling period. */
+	int vsamp;
+
+} jpc_picomp_t;
+
+/* Packet iterator class. */
+
+typedef struct {
+
+	/* The number of layers. */
+	int numlyrs;
+
+	/* The number of resolution levels. */
+	int maxrlvls;
+
+	/* The number of components. */
+	int numcomps;
+
+	/* The per-component information. */
+	jpc_picomp_t *picomps;
+
+	/* The current component. */
+	jpc_picomp_t *picomp;
+
+	/* The current resolution level. */
+	jpc_pirlvl_t *pirlvl;
+
+	/* The number of the current component. */
+	int compno;
+
+	/* The number of the current resolution level. */
+	int rlvlno;
+
+	/* The number of the current precinct. */
+	int prcno;
+
+	/* The number of the current layer. */
+	int lyrno;
+
+	/* The x-coordinate of the current position. */
+	int x;
+
+	/* The y-coordinate of the current position. */
+	int y;
+
+	/* The horizontal step size. */
+	int xstep;
+
+	/* The vertical step size. */
+	int ystep;
+
+	/* The x-coordinate of the top-left corner of the tile on the reference
+	  grid. */
+	int xstart;
+
+	/* The y-coordinate of the top-left corner of the tile on the reference
+	  grid. */
+	int ystart;
+
+	/* The x-coordinate of the bottom-right corner of the tile on the
+	  reference grid (plus one). */
+	int xend;
+
+	/* The y-coordinate of the bottom-right corner of the tile on the
+	  reference grid (plus one). */
+	int yend;
+
+	/* The current progression change. */
+	jpc_pchg_t *pchg;
+
+	/* The progression change list. */
+	jpc_pchglist_t *pchglist;
+
+	/* The progression to use in the absense of explicit specification. */
+	jpc_pchg_t defaultpchg;
+
+	/* The current progression change number. */
+	int pchgno;
+
+	/* Is this the first time in the current progression volume? */
+	bool prgvolfirst;
+
+	/* Is the current iterator value valid? */
+	bool valid;
+
+	/* The current packet number. */
+	int pktno;
+
+} jpc_pi_t;
+
+/******************************************************************************\
+* Functions/macros for packet iterators.
+\******************************************************************************/
+
+/* Create a packet iterator. */
+jpc_pi_t *jpc_pi_create0(void);
+
+/* Destroy a packet iterator. */
+void jpc_pi_destroy(jpc_pi_t *pi);
+
+/* Add a progression change to a packet iterator. */
+int jpc_pi_addpchg(jpc_pi_t *pi, jpc_pocpchg_t *pchg);
+
+/* Prepare a packet iterator for iteration. */
+int jpc_pi_init(jpc_pi_t *pi);
+
+/* Set the iterator to the first packet. */
+int jpc_pi_begin(jpc_pi_t *pi);
+
+/* Proceed to the next packet in sequence. */
+int jpc_pi_next(jpc_pi_t *pi);
+
+/* Get the index of the current packet. */
+#define	jpc_pi_getind(pi)	((pi)->pktno)
+
+/* Get the component number of the current packet. */
+#define jpc_pi_cmptno(pi)	(assert(pi->valid), (pi)->compno)
+
+/* Get the resolution level of the current packet. */
+#define jpc_pi_rlvlno(pi)	(assert(pi->valid), (pi)->rlvlno)
+
+/* Get the layer number of the current packet. */
+#define jpc_pi_lyrno(pi)	(assert(pi->valid), (pi)->lyrno)
+
+/* Get the precinct number of the current packet. */
+#define jpc_pi_prcno(pi)	(assert(pi->valid), (pi)->prcno)
+
+/* Get the progression order for the current packet. */
+#define jpc_pi_prg(pi)	(assert(pi->valid), (pi)->pchg->prgord)
+
+/******************************************************************************\
+* Functions/macros for progression change lists.
+\******************************************************************************/
+
+/* Create a progression change list. */
+jpc_pchglist_t *jpc_pchglist_create(void);
+
+/* Destroy a progression change list. */
+void jpc_pchglist_destroy(jpc_pchglist_t *pchglist);
+
+/* Insert a new element into a progression change list. */
+int jpc_pchglist_insert(jpc_pchglist_t *pchglist, int pchgno, jpc_pchg_t *pchg);
+
+/* Remove an element from a progression change list. */
+jpc_pchg_t *jpc_pchglist_remove(jpc_pchglist_t *pchglist, int pchgno);
+
+/* Get an element from a progression change list. */
+jpc_pchg_t *jpc_pchglist_get(jpc_pchglist_t *pchglist, int pchgno);
+
+/* Copy a progression change list. */
+jpc_pchglist_t *jpc_pchglist_copy(jpc_pchglist_t *pchglist);
+
+/* Get the number of elements in a progression change list. */
+int jpc_pchglist_numpchgs(jpc_pchglist_t *pchglist);
+
+/******************************************************************************\
+* Functions/macros for progression changes.
+\******************************************************************************/
+
+/* Destroy a progression change. */
+void jpc_pchg_destroy(jpc_pchg_t *pchg);
+
+/* Copy a progression change. */
+jpc_pchg_t *jpc_pchg_copy(jpc_pchg_t *pchg);
+
+#endif