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-rw-r--r--converter/other/jpeg2000/libjasper/jpc/jpc_t2cod.c733
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diff --git a/converter/other/jpeg2000/libjasper/jpc/jpc_t2cod.c b/converter/other/jpeg2000/libjasper/jpc/jpc_t2cod.c
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+++ b/converter/other/jpeg2000/libjasper/jpc/jpc_t2cod.c
@@ -0,0 +1,733 @@
+/*
+ * 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
+ *
+ * $Id$
+ */
+
+#include "jasper/jas_math.h"
+#include "jasper/jas_malloc.h"
+#include "jasper/jas_math.h"
+
+#include "jpc_cs.h"
+#include "jpc_t2cod.h"
+#include "jpc_math.h"
+
+static int jpc_pi_nextlrcp(jpc_pi_t *pi);
+static int jpc_pi_nextrlcp(jpc_pi_t *pi);
+static int jpc_pi_nextrpcl(jpc_pi_t *pi);
+static int jpc_pi_nextpcrl(jpc_pi_t *pi);
+static int jpc_pi_nextcprl(jpc_pi_t *pi);
+
+int jpc_pi_next(jpc_pi_t *pi)
+{
+	jpc_pchg_t *pchg;
+	int ret;
+
+
+	for (;;) {
+
+		pi->valid = false;
+
+		if (!pi->pchg) {
+			++pi->pchgno;
+			pi->compno = 0;
+			pi->rlvlno = 0;
+			pi->prcno = 0;
+			pi->lyrno = 0;
+			pi->prgvolfirst = true;
+			if (pi->pchgno < jpc_pchglist_numpchgs(pi->pchglist)) {
+				pi->pchg = jpc_pchglist_get(pi->pchglist, pi->pchgno);
+			} else if (pi->pchgno == jpc_pchglist_numpchgs(pi->pchglist)) {
+				pi->pchg = &pi->defaultpchg;
+			} else {
+				return 1;
+			}
+		}
+
+		pchg = pi->pchg;
+		switch (pchg->prgord) {
+		case JPC_COD_LRCPPRG:
+			ret = jpc_pi_nextlrcp(pi);
+			break;
+		case JPC_COD_RLCPPRG:
+			ret = jpc_pi_nextrlcp(pi);
+			break;
+		case JPC_COD_RPCLPRG:
+			ret = jpc_pi_nextrpcl(pi);
+			break;
+		case JPC_COD_PCRLPRG:
+			ret = jpc_pi_nextpcrl(pi);
+			break;
+		case JPC_COD_CPRLPRG:
+			ret = jpc_pi_nextcprl(pi);
+			break;
+		default:
+			ret = -1;
+			break;
+		}
+		if (!ret) {
+			pi->valid = true;
+			++pi->pktno;
+			return 0;
+		}
+		pi->pchg = 0;
+	}
+}
+
+static int jpc_pi_nextlrcp(register jpc_pi_t *pi)
+{
+	jpc_pchg_t *pchg;
+	int *prclyrno;
+
+	pchg = pi->pchg;
+	if (!pi->prgvolfirst) {
+		prclyrno = &pi->pirlvl->prclyrnos[pi->prcno];
+		goto skip;
+	} else {
+		pi->prgvolfirst = false;
+	}
+
+	for (pi->lyrno = 0; pi->lyrno < pi->numlyrs && pi->lyrno <
+	  pchg->lyrnoend; ++pi->lyrno) {
+		for (pi->rlvlno = pchg->rlvlnostart; pi->rlvlno < pi->maxrlvls &&
+		  pi->rlvlno < pchg->rlvlnoend; ++pi->rlvlno) {
+			for (pi->compno = pchg->compnostart, pi->picomp =
+			  &pi->picomps[pi->compno]; pi->compno < pi->numcomps
+			  && pi->compno < pchg->compnoend; ++pi->compno,
+			  ++pi->picomp) {
+				if (pi->rlvlno >= pi->picomp->numrlvls) {
+					continue;
+				}
+				pi->pirlvl = &pi->picomp->pirlvls[pi->rlvlno];
+				for (pi->prcno = 0, prclyrno =
+				  pi->pirlvl->prclyrnos; pi->prcno <
+				  pi->pirlvl->numprcs; ++pi->prcno,
+				  ++prclyrno) {
+					if (pi->lyrno >= *prclyrno) {
+						*prclyrno = pi->lyrno;
+						++(*prclyrno);
+						return 0;
+					}
+skip:
+					;
+				}
+			}
+		}
+	}
+	return 1;
+}
+
+static int jpc_pi_nextrlcp(register jpc_pi_t *pi)
+{
+	jpc_pchg_t *pchg;
+	int *prclyrno;
+
+	pchg = pi->pchg;
+	if (!pi->prgvolfirst) {
+		assert(pi->prcno < pi->pirlvl->numprcs);
+		prclyrno = &pi->pirlvl->prclyrnos[pi->prcno];
+		goto skip;
+	} else {
+		pi->prgvolfirst = 0;
+	}
+
+	for (pi->rlvlno = pchg->rlvlnostart; pi->rlvlno < pi->maxrlvls &&
+	  pi->rlvlno < pchg->rlvlnoend; ++pi->rlvlno) {
+		for (pi->lyrno = 0; pi->lyrno < pi->numlyrs && pi->lyrno <
+		  pchg->lyrnoend; ++pi->lyrno) {
+			for (pi->compno = pchg->compnostart, pi->picomp =
+			  &pi->picomps[pi->compno]; pi->compno < pi->numcomps &&
+			  pi->compno < pchg->compnoend; ++pi->compno, ++pi->picomp) {
+				if (pi->rlvlno >= pi->picomp->numrlvls) {
+					continue;
+				}
+				pi->pirlvl = &pi->picomp->pirlvls[pi->rlvlno];
+				for (pi->prcno = 0, prclyrno = pi->pirlvl->prclyrnos;
+				  pi->prcno < pi->pirlvl->numprcs; ++pi->prcno, ++prclyrno) {
+					if (pi->lyrno >= *prclyrno) {
+						*prclyrno = pi->lyrno;
+						++(*prclyrno);
+						return 0;
+					}
+skip:
+					;
+				}
+			}
+		}
+	}
+	return 1;
+}
+
+static int jpc_pi_nextrpcl(register jpc_pi_t *pi)
+{
+	int rlvlno;
+	jpc_pirlvl_t *pirlvl;
+	jpc_pchg_t *pchg;
+	int prchind;
+	int prcvind;
+	int *prclyrno;
+	int compno;
+	jpc_picomp_t *picomp;
+	int xstep;
+	int ystep;
+	uint_fast32_t r;
+	uint_fast32_t rpx;
+	uint_fast32_t rpy;
+	uint_fast32_t trx0;
+	uint_fast32_t try0;
+
+	pchg = pi->pchg;
+	if (!pi->prgvolfirst) {
+		goto skip;
+	} else {
+		pi->xstep = 0;
+		pi->ystep = 0;
+		for (compno = 0, picomp = pi->picomps; compno < pi->numcomps;
+		  ++compno, ++picomp) {
+			for (rlvlno = 0, pirlvl = picomp->pirlvls; rlvlno <
+			  picomp->numrlvls; ++rlvlno, ++pirlvl) {
+				xstep = picomp->hsamp * (1 << (pirlvl->prcwidthexpn +
+				  picomp->numrlvls - rlvlno - 1));
+				ystep = picomp->vsamp * (1 << (pirlvl->prcheightexpn +
+				  picomp->numrlvls - rlvlno - 1));
+				pi->xstep = (!pi->xstep) ? xstep : JAS_MIN(pi->xstep, xstep);
+				pi->ystep = (!pi->ystep) ? ystep : JAS_MIN(pi->ystep, ystep);
+			}
+		}
+		pi->prgvolfirst = 0;
+	}
+
+	for (pi->rlvlno = pchg->rlvlnostart; pi->rlvlno < pchg->rlvlnoend &&
+	  pi->rlvlno < pi->maxrlvls; ++pi->rlvlno) {
+		for (pi->y = pi->ystart; pi->y < pi->yend; pi->y +=
+		  pi->ystep - (pi->y % pi->ystep)) {
+			for (pi->x = pi->xstart; pi->x < pi->xend; pi->x +=
+			  pi->xstep - (pi->x % pi->xstep)) {
+				for (pi->compno = pchg->compnostart,
+				  pi->picomp = &pi->picomps[pi->compno];
+				  pi->compno < pchg->compnoend && pi->compno <
+				  pi->numcomps; ++pi->compno, ++pi->picomp) {
+					if (pi->rlvlno >= pi->picomp->numrlvls) {
+						continue;
+					}
+					pi->pirlvl = &pi->picomp->pirlvls[pi->rlvlno];
+					if (pi->pirlvl->numprcs == 0) {
+						continue;
+					}
+					r = pi->picomp->numrlvls - 1 - pi->rlvlno;
+					rpx = r + pi->pirlvl->prcwidthexpn;
+					rpy = r + pi->pirlvl->prcheightexpn;
+					trx0 = JPC_CEILDIV(pi->xstart, pi->picomp->hsamp << r);
+					try0 = JPC_CEILDIV(pi->ystart, pi->picomp->vsamp << r);
+					if (((pi->x == pi->xstart && ((trx0 << r) % (1 << rpx)))
+					  || !(pi->x % (1 << rpx))) &&
+					  ((pi->y == pi->ystart && ((try0 << r) % (1 << rpy)))
+					  || !(pi->y % (1 << rpy)))) {
+						prchind = JPC_FLOORDIVPOW2(JPC_CEILDIV(pi->x, pi->picomp->hsamp
+						  << r), pi->pirlvl->prcwidthexpn) - JPC_FLOORDIVPOW2(trx0,
+						  pi->pirlvl->prcwidthexpn);
+						prcvind = JPC_FLOORDIVPOW2(JPC_CEILDIV(pi->y, pi->picomp->vsamp
+						  << r), pi->pirlvl->prcheightexpn) - JPC_FLOORDIVPOW2(try0,
+						  pi->pirlvl->prcheightexpn);
+						pi->prcno = prcvind * pi->pirlvl->numhprcs + prchind;
+
+						assert(pi->prcno < pi->pirlvl->numprcs);
+						for (pi->lyrno = 0; pi->lyrno <
+						  pi->numlyrs && pi->lyrno < pchg->lyrnoend; ++pi->lyrno) {
+							prclyrno = &pi->pirlvl->prclyrnos[pi->prcno];
+							if (pi->lyrno >= *prclyrno) {
+								++(*prclyrno);
+								return 0;
+							}
+skip:
+							;
+						}
+					}
+				}
+			}
+		}
+	}
+	return 1;
+}
+
+static int jpc_pi_nextpcrl(register jpc_pi_t *pi)
+{
+	int rlvlno;
+	jpc_pirlvl_t *pirlvl;
+	jpc_pchg_t *pchg;
+	int prchind;
+	int prcvind;
+	int *prclyrno;
+	int compno;
+	jpc_picomp_t *picomp;
+	int xstep;
+	int ystep;
+	uint_fast32_t trx0;
+	uint_fast32_t try0;
+	uint_fast32_t r;
+	uint_fast32_t rpx;
+	uint_fast32_t rpy;
+
+	pchg = pi->pchg;
+	if (!pi->prgvolfirst) {
+		goto skip;
+	} else {
+		pi->xstep = 0;
+		pi->ystep = 0;
+		for (compno = 0, picomp = pi->picomps; compno < pi->numcomps;
+		  ++compno, ++picomp) {
+			for (rlvlno = 0, pirlvl = picomp->pirlvls; rlvlno <
+			  picomp->numrlvls; ++rlvlno, ++pirlvl) {
+				xstep = picomp->hsamp * (1 <<
+				  (pirlvl->prcwidthexpn + picomp->numrlvls -
+				  rlvlno - 1));
+				ystep = picomp->vsamp * (1 <<
+				  (pirlvl->prcheightexpn + picomp->numrlvls -
+				  rlvlno - 1));
+				pi->xstep = (!pi->xstep) ? xstep :
+				  JAS_MIN(pi->xstep, xstep);
+				pi->ystep = (!pi->ystep) ? ystep :
+				  JAS_MIN(pi->ystep, ystep);
+			}
+		}
+		pi->prgvolfirst = 0;
+	}
+
+	for (pi->y = pi->ystart; pi->y < pi->yend; pi->y += pi->ystep -
+	  (pi->y % pi->ystep)) {
+		for (pi->x = pi->xstart; pi->x < pi->xend; pi->x += pi->xstep -
+		  (pi->x % pi->xstep)) {
+			for (pi->compno = pchg->compnostart, pi->picomp =
+			  &pi->picomps[pi->compno]; pi->compno < pi->numcomps
+			  && pi->compno < pchg->compnoend; ++pi->compno,
+			  ++pi->picomp) {
+				for (pi->rlvlno = pchg->rlvlnostart,
+				  pi->pirlvl = &pi->picomp->pirlvls[pi->rlvlno];
+				  pi->rlvlno < pi->picomp->numrlvls &&
+				  pi->rlvlno < pchg->rlvlnoend; ++pi->rlvlno,
+				  ++pi->pirlvl) {
+					if (pi->pirlvl->numprcs == 0) {
+						continue;
+					}
+					r = pi->picomp->numrlvls - 1 - pi->rlvlno;
+					trx0 = JPC_CEILDIV(pi->xstart, pi->picomp->hsamp << r);
+					try0 = JPC_CEILDIV(pi->ystart, pi->picomp->vsamp << r);
+					rpx = r + pi->pirlvl->prcwidthexpn;
+					rpy = r + pi->pirlvl->prcheightexpn;
+					if (((pi->x == pi->xstart && ((trx0 << r) % (1 << rpx))) ||
+					  !(pi->x % (pi->picomp->hsamp << rpx))) &&
+					  ((pi->y == pi->ystart && ((try0 << r) % (1 << rpy))) ||
+					  !(pi->y % (pi->picomp->vsamp << rpy)))) {
+						prchind = JPC_FLOORDIVPOW2(JPC_CEILDIV(pi->x, pi->picomp->hsamp
+						  << r), pi->pirlvl->prcwidthexpn) - JPC_FLOORDIVPOW2(trx0,
+						  pi->pirlvl->prcwidthexpn);
+						prcvind = JPC_FLOORDIVPOW2(JPC_CEILDIV(pi->y, pi->picomp->vsamp
+						  << r), pi->pirlvl->prcheightexpn) - JPC_FLOORDIVPOW2(try0,
+						  pi->pirlvl->prcheightexpn);
+						pi->prcno = prcvind * pi->pirlvl->numhprcs + prchind;
+						assert(pi->prcno < pi->pirlvl->numprcs);
+						for (pi->lyrno = 0; pi->lyrno < pi->numlyrs &&
+						  pi->lyrno < pchg->lyrnoend; ++pi->lyrno) {
+							prclyrno = &pi->pirlvl->prclyrnos[pi->prcno];
+							if (pi->lyrno >= *prclyrno) {
+								++(*prclyrno);
+								return 0;
+							}
+skip:
+							;
+						}
+					}
+				}
+			}
+		}
+	}
+	return 1;
+}
+
+static int jpc_pi_nextcprl(register jpc_pi_t *pi)
+{
+	int rlvlno;
+	jpc_pirlvl_t *pirlvl;
+	jpc_pchg_t *pchg;
+	int prchind;
+	int prcvind;
+	int *prclyrno;
+	uint_fast32_t trx0;
+	uint_fast32_t try0;
+	uint_fast32_t r;
+	uint_fast32_t rpx;
+	uint_fast32_t rpy;
+
+	pchg = pi->pchg;
+	if (!pi->prgvolfirst) {
+		goto skip;
+	} else {
+		pi->prgvolfirst = 0;
+	}
+
+	for (pi->compno = pchg->compnostart, pi->picomp =
+	  &pi->picomps[pi->compno]; pi->compno < pchg->compnoend; ++pi->compno,
+	  ++pi->picomp) {
+		pirlvl = pi->picomp->pirlvls;
+		pi->xstep = pi->picomp->hsamp * (1 << (pirlvl->prcwidthexpn +
+		  pi->picomp->numrlvls - 1));
+		pi->ystep = pi->picomp->vsamp * (1 << (pirlvl->prcheightexpn +
+		  pi->picomp->numrlvls - 1));
+		for (rlvlno = 1, pirlvl = &pi->picomp->pirlvls[1];
+		  rlvlno < pi->picomp->numrlvls; ++rlvlno, ++pirlvl) {
+			pi->xstep = JAS_MIN(pi->xstep, pi->picomp->hsamp * (1 <<
+			  (pirlvl->prcwidthexpn + pi->picomp->numrlvls -
+			  rlvlno - 1)));
+			pi->ystep = JAS_MIN(pi->ystep, pi->picomp->vsamp * (1 <<
+			  (pirlvl->prcheightexpn + pi->picomp->numrlvls -
+			  rlvlno - 1)));
+		}
+		for (pi->y = pi->ystart; pi->y < pi->yend;
+		  pi->y += pi->ystep - (pi->y % pi->ystep)) {
+			for (pi->x = pi->xstart; pi->x < pi->xend;
+			  pi->x += pi->xstep - (pi->x % pi->xstep)) {
+				for (pi->rlvlno = pchg->rlvlnostart,
+				  pi->pirlvl = &pi->picomp->pirlvls[pi->rlvlno];
+				  pi->rlvlno < pi->picomp->numrlvls && pi->rlvlno <
+				  pchg->rlvlnoend; ++pi->rlvlno, ++pi->pirlvl) {
+					if (pi->pirlvl->numprcs == 0) {
+						continue;
+					}
+					r = pi->picomp->numrlvls - 1 - pi->rlvlno;
+					trx0 = JPC_CEILDIV(pi->xstart, pi->picomp->hsamp << r);
+					try0 = JPC_CEILDIV(pi->ystart, pi->picomp->vsamp << r);
+					rpx = r + pi->pirlvl->prcwidthexpn;
+					rpy = r + pi->pirlvl->prcheightexpn;
+					if (((pi->x == pi->xstart && ((trx0 << r) % (1 << rpx))) ||
+					  !(pi->x % (pi->picomp->hsamp << rpx))) &&
+					  ((pi->y == pi->ystart && ((try0 << r) % (1 << rpy))) ||
+					  !(pi->y % (pi->picomp->vsamp << rpy)))) {
+						prchind = JPC_FLOORDIVPOW2(JPC_CEILDIV(pi->x, pi->picomp->hsamp
+						  << r), pi->pirlvl->prcwidthexpn) - JPC_FLOORDIVPOW2(trx0,
+						  pi->pirlvl->prcwidthexpn);
+						prcvind = JPC_FLOORDIVPOW2(JPC_CEILDIV(pi->y, pi->picomp->vsamp
+						  << r), pi->pirlvl->prcheightexpn) - JPC_FLOORDIVPOW2(try0,
+						  pi->pirlvl->prcheightexpn);
+						pi->prcno = prcvind *
+						  pi->pirlvl->numhprcs +
+						  prchind;
+						assert(pi->prcno <
+						  pi->pirlvl->numprcs);
+						for (pi->lyrno = 0; pi->lyrno <
+						  pi->numlyrs && pi->lyrno < pchg->lyrnoend; ++pi->lyrno) {
+							prclyrno = &pi->pirlvl->prclyrnos[pi->prcno];
+							if (pi->lyrno >= *prclyrno) {
+								++(*prclyrno);
+								return 0;
+							}
+skip:
+							;
+						}
+					}
+				}
+			}
+		}
+	}
+	return 1;
+}
+
+static void pirlvl_destroy(jpc_pirlvl_t *rlvl)
+{
+	if (rlvl->prclyrnos) {
+		jas_free(rlvl->prclyrnos);
+	}
+}
+
+static void jpc_picomp_destroy(jpc_picomp_t *picomp)
+{
+	int rlvlno;
+	jpc_pirlvl_t *pirlvl;
+	if (picomp->pirlvls) {
+		for (rlvlno = 0, pirlvl = picomp->pirlvls; rlvlno <
+		  picomp->numrlvls; ++rlvlno, ++pirlvl) {
+			pirlvl_destroy(pirlvl);
+		}
+		jas_free(picomp->pirlvls);
+	}
+}
+
+void jpc_pi_destroy(jpc_pi_t *pi)
+{
+	jpc_picomp_t *picomp;
+	int compno;
+	if (pi->picomps) {
+		for (compno = 0, picomp = pi->picomps; compno < pi->numcomps;
+		  ++compno, ++picomp) {
+			jpc_picomp_destroy(picomp);
+		}
+		jas_free(pi->picomps);
+	}
+	if (pi->pchglist) {
+		jpc_pchglist_destroy(pi->pchglist);
+	}
+	jas_free(pi);
+}
+
+jpc_pi_t *jpc_pi_create0(void)
+{
+	jpc_pi_t *pi;
+	if (!(pi = jas_malloc(sizeof(jpc_pi_t)))) {
+		return 0;
+	}
+	pi->picomps = 0;
+	pi->pchgno = 0;
+	if (!(pi->pchglist = jpc_pchglist_create())) {
+		jas_free(pi);
+		return 0;
+	}
+	return pi;
+}
+
+int jpc_pi_addpchg(jpc_pi_t *pi, jpc_pocpchg_t *pchg)
+{
+	return jpc_pchglist_insert(pi->pchglist, -1, pchg);
+}
+
+jpc_pchglist_t *jpc_pchglist_create(void)
+{
+	jpc_pchglist_t *pchglist;
+	if (!(pchglist = jas_malloc(sizeof(jpc_pchglist_t)))) {
+		return 0;
+	}
+	pchglist->numpchgs = 0;
+	pchglist->maxpchgs = 0;
+	pchglist->pchgs = 0;
+	return pchglist;
+}
+
+int jpc_pchglist_insert(jpc_pchglist_t *pchglist, int pchgno, jpc_pchg_t *pchg)
+{
+	int i;
+	int newmaxpchgs;
+	jpc_pchg_t **newpchgs;
+	if (pchgno < 0) {
+		pchgno = pchglist->numpchgs;
+	}
+	if (pchglist->numpchgs >= pchglist->maxpchgs) {
+		newmaxpchgs = pchglist->maxpchgs + 128;
+		if (!(newpchgs = jas_realloc(pchglist->pchgs, newmaxpchgs * sizeof(jpc_pchg_t *)))) {
+			return -1;
+		}
+		pchglist->maxpchgs = newmaxpchgs;
+		pchglist->pchgs = newpchgs;
+	}
+	for (i = pchglist->numpchgs; i > pchgno; --i) {
+		pchglist->pchgs[i] = pchglist->pchgs[i - 1];
+	}
+	pchglist->pchgs[pchgno] = pchg;
+	++pchglist->numpchgs;
+	return 0;
+}
+
+jpc_pchg_t *jpc_pchglist_remove(jpc_pchglist_t *pchglist, int pchgno)
+{
+	int i;
+	jpc_pchg_t *pchg;
+	assert(pchgno < pchglist->numpchgs);
+	pchg = pchglist->pchgs[pchgno];
+	for (i = pchgno + 1; i < pchglist->numpchgs; ++i) {
+		pchglist->pchgs[i - 1] = pchglist->pchgs[i];
+	}
+	--pchglist->numpchgs;
+	return pchg;
+}
+
+jpc_pchg_t *jpc_pchg_copy(jpc_pchg_t *pchg)
+{
+	jpc_pchg_t *newpchg;
+	if (!(newpchg = jas_malloc(sizeof(jpc_pchg_t)))) {
+		return 0;
+	}
+	*newpchg = *pchg;
+	return newpchg;
+}
+
+jpc_pchglist_t *jpc_pchglist_copy(jpc_pchglist_t *pchglist)
+{
+	jpc_pchglist_t *newpchglist;
+	jpc_pchg_t *newpchg;
+	int pchgno;
+	if (!(newpchglist = jpc_pchglist_create())) {
+		return 0;
+	}
+	for (pchgno = 0; pchgno < pchglist->numpchgs; ++pchgno) {
+		if (!(newpchg = jpc_pchg_copy(pchglist->pchgs[pchgno])) ||
+		  jpc_pchglist_insert(newpchglist, -1, newpchg)) {
+			jpc_pchglist_destroy(newpchglist);
+			return 0;
+		}
+	}
+	return newpchglist;
+}
+
+void jpc_pchglist_destroy(jpc_pchglist_t *pchglist)
+{
+	int pchgno;
+	if (pchglist->pchgs) {
+		for (pchgno = 0; pchgno < pchglist->numpchgs; ++pchgno) {
+			jpc_pchg_destroy(pchglist->pchgs[pchgno]);
+		}
+		jas_free(pchglist->pchgs);
+	}
+	jas_free(pchglist);
+}
+
+void jpc_pchg_destroy(jpc_pchg_t *pchg)
+{
+	jas_free(pchg);
+}
+
+jpc_pchg_t *jpc_pchglist_get(jpc_pchglist_t *pchglist, int pchgno)
+{
+	return pchglist->pchgs[pchgno];
+}
+
+int jpc_pchglist_numpchgs(jpc_pchglist_t *pchglist)
+{
+	return pchglist->numpchgs;
+}
+
+int jpc_pi_init(jpc_pi_t *pi)
+{
+	int compno;
+	int rlvlno;
+	int prcno;
+	jpc_picomp_t *picomp;
+	jpc_pirlvl_t *pirlvl;
+	int *prclyrno;
+
+	pi->prgvolfirst = 0;
+	pi->valid = 0;
+	pi->pktno = -1;
+	pi->pchgno = -1;
+	pi->pchg = 0;
+
+	for (compno = 0, picomp = pi->picomps; compno < pi->numcomps;
+	  ++compno, ++picomp) {
+		for (rlvlno = 0, pirlvl = picomp->pirlvls; rlvlno <
+		  picomp->numrlvls; ++rlvlno, ++pirlvl) {
+			for (prcno = 0, prclyrno = pirlvl->prclyrnos;
+			  prcno < pirlvl->numprcs; ++prcno, ++prclyrno) {
+				*prclyrno = 0;
+			}
+		}
+	}
+	return 0;
+}