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diff --git a/indexer_JPIP/pi.c b/indexer_JPIP/pi.c
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+/*
+ * Copyright (c) 2001-2002, David Janssens
+ * Copyright (c) 2003, Yannick Verschueren
+ * Copyright (c) 2003,  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.
+ */
+ 
+#include "pi.h"
+#include "int.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+ 
+/// <summary>
+/// Create a packet iterator.  
+/// </summary>
+pi_iterator_t *pi_create(j2k_image_t *img, j2k_cp_t *cp, int tileno) {
+    int p, q;
+    int compno, resno,pino, layno, precno;
+    int maxres=0;
+    pi_iterator_t *pi;
+    j2k_tcp_t *tcp;
+    j2k_tccp_t *tccp;
+  
+    tcp=&cp->tcps[tileno];
+    pi=(pi_iterator_t*)malloc((tcp->numpocs+1)*sizeof(pi_iterator_t));
+    
+    for (pino=0;pino<tcp->numpocs+1;pino++) // change
+      {
+	p=tileno%cp->tw;
+	q=tileno/cp->tw;
+	
+	pi[pino].tx0=int_max(cp->tx0+p*cp->tdx, img->x0);
+	pi[pino].ty0=int_max(cp->ty0+q*cp->tdy, img->y0);
+	pi[pino].tx1=int_min(cp->tx0+(p+1)*cp->tdx, img->x1);
+	pi[pino].ty1=int_min(cp->ty0+(q+1)*cp->tdy, img->y1);
+	pi[pino].numcomps=img->numcomps;
+	pi[pino].comps=(pi_comp_t*)malloc(img->numcomps*sizeof(pi_comp_t));
+	
+	for (compno=0; compno<pi->numcomps; compno++) 
+	  {
+	    int tcx0, tcy0, tcx1, tcy1;
+	    pi_comp_t *comp=&pi[pino].comps[compno];
+	    
+	    tccp=&tcp->tccps[compno];
+	    comp->dx=img->comps[compno].dx;
+	    comp->dy=img->comps[compno].dy;
+	    comp->numresolutions=tccp->numresolutions;
+	    comp->resolutions=(pi_resolution_t*)malloc(comp->numresolutions*sizeof(pi_resolution_t));
+	    tcx0=int_ceildiv(pi->tx0, comp->dx);
+	    tcy0=int_ceildiv(pi->ty0, comp->dy);
+	    tcx1=int_ceildiv(pi->tx1, comp->dx);
+	    tcy1=int_ceildiv(pi->ty1, comp->dy);
+	    if (comp->numresolutions>maxres) {
+	      maxres=comp->numresolutions;
+	    }
+	    for (resno=0; resno<comp->numresolutions; resno++) 
+	      {
+		int levelno;
+		int rx0, ry0, rx1, ry1;
+		int px0, py0, px1, py1;
+		pi_resolution_t *res=&comp->resolutions[resno];
+		if (tccp->csty&J2K_CCP_CSTY_PRT) {
+		  res->pdx=tccp->prcw[resno];
+		  res->pdy=tccp->prch[resno];
+		} else {
+		  res->pdx=15;
+		  res->pdy=15;
+		}
+		levelno=comp->numresolutions-1-resno;
+		rx0=int_ceildivpow2(tcx0, levelno);
+		ry0=int_ceildivpow2(tcy0, levelno);
+		rx1=int_ceildivpow2(tcx1, levelno);
+		ry1=int_ceildivpow2(tcy1, levelno);
+		px0=int_floordivpow2(rx0, res->pdx)<<res->pdx;
+		py0=int_floordivpow2(ry0, res->pdy)<<res->pdy;
+		px1=int_ceildivpow2(rx1, res->pdx)<<res->pdx;
+		py1=int_ceildivpow2(ry1, res->pdy)<<res->pdy;
+		res->pw=(px1-px0)>>res->pdx;
+		res->ph=(py1-py0)>>res->pdy;
+	      }
+	  }
+	
+	for (layno=0; layno<10; layno++) 
+	  {
+	    for (resno=0; resno<10; resno++) 
+	      {
+		for (compno=0; compno<3; compno++) 
+		  {
+		    for (precno=0; precno<99; precno++)
+		      {
+			pi[pino].include[layno][resno][compno][precno]=0;
+		      }
+		  }
+	      }
+	  }
+	
+	if (pino==tcp->numpocs)
+	  {
+	    pi[pino].first=1;
+	    pi[pino].poc.resno0=0;
+	    pi[pino].poc.compno0=0;
+	    pi[pino].poc.layno1=tcp->numlayers;
+	    pi[pino].poc.resno1=maxres;
+	    pi[pino].poc.compno1=img->numcomps;
+	    pi[pino].poc.prg=tcp->prg;
+	  } else
+	    {
+	      pi[pino].first=1;
+	      pi[pino].poc.resno0=tcp->pocs[pino].resno0;
+	      pi[pino].poc.compno0=tcp->pocs[pino].compno0;
+	      pi[pino].poc.layno1=tcp->pocs[pino].layno1;
+	      pi[pino].poc.resno1=tcp->pocs[pino].resno1;
+	      pi[pino].poc.compno1=tcp->pocs[pino].compno1;
+	      pi[pino].poc.prg=tcp->pocs[pino].prg;
+	    }
+      }
+    return pi;
+}
+
+/// <summary>
+/// Get next packet in layer=resolution-component-precinct order.  
+/// </summary>
+int pi_next_lrcp(pi_iterator_t *pi) {
+    pi_comp_t *comp;
+    pi_resolution_t *res;
+
+    if (!pi->first) 
+      {
+        comp=&pi->comps[pi->compno];
+        res=&comp->resolutions[pi->resno];
+        goto skip;
+      } else {
+        pi->first=0;
+      }
+    for (pi->layno=0; pi->layno<pi->poc.layno1; pi->layno++) 
+      {
+        for (pi->resno=pi->poc.resno0; pi->resno<pi->poc.resno1; pi->resno++) 
+	  {
+            for (pi->compno=pi->poc.compno0; pi->compno<pi->poc.compno1; pi->compno++) 
+	      {
+
+                comp=&pi->comps[pi->compno];
+                if (pi->resno>=comp->numresolutions) 
+		  {
+		    
+                    continue;
+		  }
+                res=&comp->resolutions[pi->resno];
+
+		for (pi->precno=0; pi->precno<res->pw*res->ph; pi->precno++) 
+		  {
+
+		     if (!pi->include[pi->layno][pi->resno][pi->compno][pi->precno])
+		      {
+		    	pi->include[pi->layno][pi->resno][pi->compno][pi->precno]=1;
+		    return 1;
+		      }
+		  skip:	   ;
+		  }
+	      }
+	  }
+      }
+    return 0;
+}
+
+/// <summary>
+/// Get next packet in resolution-layer-component-precinct order.  
+/// </summary>
+int pi_next_rlcp(pi_iterator_t *pi) {
+    pi_comp_t *comp;
+    pi_resolution_t *res;
+    if (!pi->first) {
+        comp=&pi->comps[pi->compno];
+        res=&comp->resolutions[pi->resno];
+        goto skip;
+    } else {
+        pi->first=0;
+    }
+    for (pi->resno=pi->poc.resno0; pi->resno<pi->poc.resno1; pi->resno++) {
+        for (pi->layno=0; pi->layno<pi->poc.layno1; pi->layno++) {
+            for (pi->compno=pi->poc.compno0; pi->compno<pi->poc.compno1; pi->compno++) {
+                comp=&pi->comps[pi->compno];
+                if (pi->resno>=comp->numresolutions) {
+                    continue;
+                }
+                res=&comp->resolutions[pi->resno];
+                for (pi->precno=0; pi->precno<res->pw*res->ph; pi->precno++) {
+		     if (!pi->include[pi->layno][pi->resno][pi->compno][pi->precno])
+		      {
+		  	pi->include[pi->layno][pi->resno][pi->compno][pi->precno]=1;   
+			return 1;
+		      }
+		skip:	;
+                }
+            }
+        }
+    }
+    return 0;
+}
+
+/// <summary>
+/// Get next packet in resolution-precinct-component-layer order.  
+/// </summary>
+int pi_next_rpcl(pi_iterator_t *pi) {
+    pi_comp_t *comp;
+    pi_resolution_t *res;
+    if (!pi->first) {
+        goto skip;
+    } else {
+        int compno, resno;
+        pi->first=0;
+        pi->dx=0;
+        pi->dy=0;
+        for (compno=0; compno<pi->numcomps; compno++) {
+            comp=&pi->comps[compno];
+            for (resno=0; resno<comp->numresolutions; resno++) {
+                int dx, dy;
+                res=&comp->resolutions[resno];
+                dx=comp->dx*(1<<(res->pdx+comp->numresolutions-1-resno));
+                dy=comp->dy*(1<<(res->pdy+comp->numresolutions-1-resno));
+                pi->dx=!pi->dx?dx:int_min(pi->dx, dx);
+                pi->dy=!pi->dy?dy:int_min(pi->dy, dy);
+            }
+        }
+    }
+    for (pi->resno=pi->poc.resno0; pi->resno<pi->poc.resno1; pi->resno++) {
+        for (pi->y=pi->ty0; pi->y<pi->ty1; pi->y+=pi->dy-(pi->y%pi->dy)) {
+            for (pi->x=pi->tx0; pi->x<pi->tx1; pi->x+=pi->dx-(pi->x%pi->dx)) {
+                for (pi->compno=pi->poc.compno0; pi->compno<pi->poc.compno1; pi->compno++) {
+                    int levelno;
+                    int trx0, try0;
+                    int rpx, rpy;
+                    int prci, prcj;
+                    comp=&pi->comps[pi->compno];
+                    if (pi->resno>=comp->numresolutions) {
+                        continue;
+                    }
+                    res=&comp->resolutions[pi->resno];
+                    levelno=comp->numresolutions-1-pi->resno;
+                    trx0=int_ceildiv(pi->tx0, comp->dx<<levelno);
+                    try0=int_ceildiv(pi->ty0, comp->dy<<levelno);
+                    rpx=res->pdx+levelno;
+                    rpy=res->pdy+levelno;
+                    if (!(pi->x%(comp->dx<<rpx)==0||(pi->x==pi->tx0&&(trx0<<levelno)%(1<<rpx)))) {
+                        continue;
+                    }
+                    if (!(pi->y%(comp->dy<<rpy)==0||(pi->y==pi->ty0&&(try0<<levelno)%(1<<rpx)))) {
+                        continue;
+                    }
+                    prci=int_floordivpow2(int_ceildiv(pi->x, comp->dx<<levelno), res->pdx)-int_floordivpow2(trx0, res->pdx);
+                    prcj=int_floordivpow2(int_ceildiv(pi->y, comp->dy<<levelno), res->pdy)-int_floordivpow2(try0, res->pdy);
+                    pi->precno=prci+prcj*res->pw;
+                    for (pi->layno=0; pi->layno<pi->poc.layno1; pi->layno++) {
+		      if (!pi->include[pi->layno][pi->resno][pi->compno][pi->precno])
+		      	{
+		      	  pi->include[pi->layno][pi->resno][pi->compno][pi->precno]=1;  
+			  return 1;
+		       	}
+		    skip:	;
+                    }
+                }
+            }
+        }
+    }
+    return 0;
+}
+
+/// <summary>
+/// Get next packet in precinct-component-resolution-layer order.  
+/// </summary>
+int pi_next_pcrl(pi_iterator_t *pi) {
+    pi_comp_t *comp;
+    pi_resolution_t *res;
+    if (!pi->first) {
+        comp=&pi->comps[pi->compno];
+        goto skip;
+    } else {
+        int compno, resno;
+        pi->first=0;
+        pi->dx=0;
+        pi->dy=0;
+        for (compno=0; compno<pi->numcomps; compno++) {
+            comp=&pi->comps[compno];
+            for (resno=0; resno<comp->numresolutions; resno++) {
+                int dx, dy;
+                res=&comp->resolutions[resno];
+                dx=comp->dx*(1<<(res->pdx+comp->numresolutions-1-resno));
+                dy=comp->dy*(1<<(res->pdy+comp->numresolutions-1-resno));
+                pi->dx=!pi->dx?dx:int_min(pi->dx, dx);
+                pi->dy=!pi->dy?dy:int_min(pi->dy, dy);
+            }
+        }
+    }
+    for (pi->y=pi->ty0; pi->y<pi->ty1; pi->y+=pi->dy-(pi->y%pi->dy)) {
+        for (pi->x=pi->tx0; pi->x<pi->tx1; pi->x+=pi->dx-(pi->x%pi->dx)) {
+            for (pi->compno=pi->poc.compno0; pi->compno<pi->poc.compno1; pi->compno++) {
+                comp=&pi->comps[pi->compno];
+                for (pi->resno=pi->poc.resno0; pi->resno<int_min(pi->poc.resno1, comp->numresolutions); pi->resno++) {
+                    int levelno;
+                    int trx0, try0;
+                    int rpx, rpy;
+                    int prci, prcj;
+                    res=&comp->resolutions[pi->resno];
+                    levelno=comp->numresolutions-1-pi->resno;
+                    trx0=int_ceildiv(pi->tx0, comp->dx<<levelno);
+                    try0=int_ceildiv(pi->ty0, comp->dy<<levelno);
+                    rpx=res->pdx+levelno;
+                    rpy=res->pdy+levelno;
+                    if (!(pi->x%(comp->dx<<rpx)==0||(pi->x==pi->tx0&&(trx0<<levelno)%(1<<rpx)))) {
+                        continue;
+                    }
+                    if (!(pi->y%(comp->dy<<rpy)==0||(pi->y==pi->ty0&&(try0<<levelno)%(1<<rpx)))) {
+                        continue;
+                    }
+                    prci=int_floordivpow2(int_ceildiv(pi->x, comp->dx<<levelno), res->pdx)-int_floordivpow2(trx0, res->pdx);
+                    prcj=int_floordivpow2(int_ceildiv(pi->y, comp->dy<<levelno), res->pdy)-int_floordivpow2(try0, res->pdy);
+                    pi->precno=prci+prcj*res->pw;
+                    for (pi->layno=0; pi->layno<pi->poc.layno1; pi->layno++) {
+		       if (!pi->include[pi->layno][pi->resno][pi->compno][pi->precno])
+		      	{
+		      	  pi->include[pi->layno][pi->resno][pi->compno][pi->precno]=1;
+			  return 1;
+			}
+		    skip:	;
+                    }
+                }
+            }
+        }
+    }
+    return 0;
+}
+
+/// <summary>
+/// Get next packet in component-precinct-resolution-layer order.  
+/// </summary>
+int pi_next_cprl(pi_iterator_t *pi) {
+    pi_comp_t *comp;
+    pi_resolution_t *res;
+    if (!pi->first) {
+        comp=&pi->comps[pi->compno];
+        goto skip;
+    } else {
+        pi->first=0;
+    }
+    for (pi->compno=pi->poc.compno0; pi->compno<pi->poc.compno1; pi->compno++) {
+        int resno;
+        comp=&pi->comps[pi->compno];
+        pi->dx=0;
+        pi->dy=0;
+        for (resno=0; resno<comp->numresolutions; resno++) {
+            int dx, dy;
+            res=&comp->resolutions[resno];
+            dx=comp->dx*(1<<(res->pdx+comp->numresolutions-1-resno));
+            dy=comp->dy*(1<<(res->pdy+comp->numresolutions-1-resno));
+            pi->dx=!pi->dx?dx:int_min(pi->dx, dx);
+            pi->dy=!pi->dy?dy:int_min(pi->dy, dy);
+        }
+        for (pi->y=pi->ty0; pi->y<pi->ty1; pi->y+=pi->dy-(pi->y%pi->dy)) {
+            for (pi->x=pi->tx0; pi->x<pi->tx1; pi->x+=pi->dx-(pi->x%pi->dx)) {
+                for (pi->resno=pi->poc.resno0; pi->resno<int_min(pi->poc.resno1, comp->numresolutions); pi->resno++) {
+                    int levelno;
+                    int trx0, try0;
+                    int rpx, rpy;
+                    int prci, prcj;
+                    res=&comp->resolutions[pi->resno];
+                    levelno=comp->numresolutions-1-pi->resno;
+                    trx0=int_ceildiv(pi->tx0, comp->dx<<levelno);
+                    try0=int_ceildiv(pi->ty0, comp->dy<<levelno);
+                    rpx=res->pdx+levelno;
+                    rpy=res->pdy+levelno;
+                    if (!(pi->x%(comp->dx<<rpx)==0||(pi->x==pi->tx0&&(trx0<<levelno)%(1<<rpx)))) {
+                        continue;
+                    }
+                    if (!(pi->y%(comp->dy<<rpy)==0||(pi->y==pi->ty0&&(try0<<levelno)%(1<<rpx)))) {
+                        continue;
+                    }
+                    prci=int_floordivpow2(int_ceildiv(pi->x, comp->dx<<levelno), res->pdx)-int_floordivpow2(trx0, res->pdx);
+                    prcj=int_floordivpow2(int_ceildiv(pi->y, comp->dy<<levelno), res->pdy)-int_floordivpow2(try0, res->pdy);
+                    pi->precno=prci+prcj*res->pw;
+                    for (pi->layno=0; pi->layno<pi->poc.layno1; pi->layno++) {
+		        if (!pi->include[pi->layno][pi->resno][pi->compno][pi->precno])
+		      	{
+		      	  pi->include[pi->layno][pi->resno][pi->compno][pi->precno]=1;
+			  return 1;
+			}
+		    skip: ;
+		    }
+                }
+            }
+        }
+    }
+    return 0;
+}
+
+/// <summary>
+/// Get next packet.  
+/// </summary>
+int pi_next(pi_iterator_t *pi) {
+    switch (pi->poc.prg) {
+        case 0:
+            return pi_next_lrcp(pi);
+        case 1:
+            return pi_next_rlcp(pi);
+        case 2:
+            return pi_next_rpcl(pi);
+        case 3:
+            return pi_next_pcrl(pi);
+        case 4:
+            return pi_next_cprl(pi);
+    }
+	return 0;
+}