Create Subversion repository

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@1 9d0c8265-081b-0410-96cb-a4ca84ce46f8

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diff --git a/converter/other/jpeg2000/libjasper/jpc/jpc_dec.c b/converter/other/jpeg2000/libjasper/jpc/jpc_dec.c
new file mode 100644
index 00000000..42980225
--- /dev/null
+++ b/converter/other/jpeg2000/libjasper/jpc/jpc_dec.c
@@ -0,0 +1,2334 @@
+/*
+ * 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__
+ */
+
+/*
+ * $Id$
+ */
+
+/******************************************************************************\
+* Includes.
+\******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "jasper/jas_types.h"
+#include "jasper/jas_math.h"
+#include "jasper/jas_tvp.h"
+#include "jasper/jas_malloc.h"
+#include "jasper/jas_debug.h"
+
+#include "jpc_fix.h"
+#include "jpc_dec.h"
+#include "jpc_cs.h"
+#include "jpc_mct.h"
+#include "jpc_t2dec.h"
+#include "jpc_t1dec.h"
+#include "jpc_math.h"
+
+/******************************************************************************\
+*
+\******************************************************************************/
+
+#define	JPC_MHSOC	0x0001
+  /* In the main header, expecting a SOC marker segment. */
+#define	JPC_MHSIZ	0x0002
+  /* In the main header, expecting a SIZ marker segment. */
+#define	JPC_MH		0x0004
+  /* In the main header, expecting "other" marker segments. */
+#define	JPC_TPHSOT	0x0008
+  /* In a tile-part header, expecting a SOT marker segment. */
+#define	JPC_TPH		0x0010
+  /* In a tile-part header, expecting "other" marker segments. */
+#define	JPC_MT		0x0020
+  /* In the main trailer. */
+
+typedef struct {
+
+	uint_fast16_t id;
+	/* The marker segment type. */
+
+	int validstates;
+	/* The states in which this type of marker segment can be
+	  validly encountered. */
+
+	int (*action)(jpc_dec_t *dec, jpc_ms_t *ms);
+	/* The action to take upon encountering this type of marker segment. */
+
+} jpc_dec_mstabent_t;
+
+/******************************************************************************\
+*
+\******************************************************************************/
+
+/* COD/COC parameters have been specified. */
+#define	JPC_CSET	0x0001
+/* QCD/QCC parameters have been specified. */
+#define	JPC_QSET	0x0002
+/* COD/COC parameters set from a COC marker segment. */
+#define	JPC_COC	0x0004
+/* QCD/QCC parameters set from a QCC marker segment. */
+#define	JPC_QCC	0x0008
+
+/******************************************************************************\
+* Local function prototypes.
+\******************************************************************************/
+
+static int jpc_dec_dump(jpc_dec_t *dec, FILE *out);
+
+jpc_ppxstab_t *jpc_ppxstab_create(void);
+void jpc_ppxstab_destroy(jpc_ppxstab_t *tab);
+int jpc_ppxstab_grow(jpc_ppxstab_t *tab, int maxents);
+int jpc_ppxstab_insert(jpc_ppxstab_t *tab, jpc_ppxstabent_t *ent);
+jpc_streamlist_t *jpc_ppmstabtostreams(jpc_ppxstab_t *tab);
+int jpc_pptstabwrite(jas_stream_t *out, jpc_ppxstab_t *tab);
+jpc_ppxstabent_t *jpc_ppxstabent_create(void);
+void jpc_ppxstabent_destroy(jpc_ppxstabent_t *ent);
+
+int jpc_streamlist_numstreams(jpc_streamlist_t *streamlist);
+jpc_streamlist_t *jpc_streamlist_create(void);
+int jpc_streamlist_insert(jpc_streamlist_t *streamlist, int streamno,
+  jas_stream_t *stream);
+jas_stream_t *jpc_streamlist_remove(jpc_streamlist_t *streamlist, int streamno);
+void jpc_streamlist_destroy(jpc_streamlist_t *streamlist);
+jas_stream_t *jpc_streamlist_get(jpc_streamlist_t *streamlist, int streamno);
+
+static void jpc_dec_cp_resetflags(jpc_dec_cp_t *cp);
+static jpc_dec_cp_t *jpc_dec_cp_create(uint_fast16_t numcomps);
+static int jpc_dec_cp_isvalid(jpc_dec_cp_t *cp);
+static jpc_dec_cp_t *jpc_dec_cp_copy(jpc_dec_cp_t *cp);
+static int jpc_dec_cp_setfromcod(jpc_dec_cp_t *cp, jpc_cod_t *cod);
+static int jpc_dec_cp_setfromcoc(jpc_dec_cp_t *cp, jpc_coc_t *coc);
+static int jpc_dec_cp_setfromcox(jpc_dec_cp_t *cp, jpc_dec_ccp_t *ccp,
+  jpc_coxcp_t *compparms, int flags);
+static int jpc_dec_cp_setfromqcd(jpc_dec_cp_t *cp, jpc_qcd_t *qcd);
+static int jpc_dec_cp_setfromqcc(jpc_dec_cp_t *cp, jpc_qcc_t *qcc);
+static int jpc_dec_cp_setfromqcx(jpc_dec_cp_t *cp, jpc_dec_ccp_t *ccp,
+  jpc_qcxcp_t *compparms, int flags);
+static int jpc_dec_cp_setfromrgn(jpc_dec_cp_t *cp, jpc_rgn_t *rgn);
+static int jpc_dec_cp_prepare(jpc_dec_cp_t *cp);
+static void jpc_dec_cp_destroy(jpc_dec_cp_t *cp);
+static int jpc_dec_cp_setfrompoc(jpc_dec_cp_t *cp, jpc_poc_t *poc, int reset);
+static int jpc_pi_addpchgfrompoc(jpc_pi_t *pi, jpc_poc_t *poc);
+
+static int jpc_dec_decode(jpc_dec_t *dec);
+static jpc_dec_t *jpc_dec_create(jpc_dec_importopts_t *impopts, jas_stream_t *in);
+static void jpc_dec_destroy(jpc_dec_t *dec);
+static void jpc_dequantize(jas_matrix_t *x, jpc_fix_t absstepsize);
+static void jpc_undo_roi(jas_matrix_t *x, int roishift, int bgshift, int numbps);
+static jpc_fix_t jpc_calcabsstepsize(int stepsize, int numbits);
+static int jpc_dec_tiledecode(jpc_dec_t *dec, jpc_dec_tile_t *tile);
+static int jpc_dec_tileinit(jpc_dec_t *dec, jpc_dec_tile_t *tile);
+static int jpc_dec_tilefini(jpc_dec_t *dec, jpc_dec_tile_t *tile);
+static int jpc_dec_process_soc(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_sot(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_sod(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_eoc(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_siz(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_cod(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_coc(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_rgn(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_qcd(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_qcc(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_poc(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_ppm(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_ppt(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_com(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_unk(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_process_crg(jpc_dec_t *dec, jpc_ms_t *ms);
+static int jpc_dec_parseopts(char *optstr, jpc_dec_importopts_t *opts);
+
+/******************************************************************************\
+* Global data.
+\******************************************************************************/
+
+jpc_dec_mstabent_t jpc_dec_mstab[] = {
+	{JPC_MS_SOC, JPC_MHSOC, jpc_dec_process_soc},
+	{JPC_MS_SOT, JPC_MH | JPC_TPHSOT, jpc_dec_process_sot},
+	{JPC_MS_SOD, JPC_TPH, jpc_dec_process_sod},
+	{JPC_MS_EOC, JPC_TPHSOT, jpc_dec_process_eoc},
+	{JPC_MS_SIZ, JPC_MHSIZ, jpc_dec_process_siz},
+	{JPC_MS_COD, JPC_MH | JPC_TPH, jpc_dec_process_cod},
+	{JPC_MS_COC, JPC_MH | JPC_TPH, jpc_dec_process_coc},
+	{JPC_MS_RGN, JPC_MH | JPC_TPH, jpc_dec_process_rgn},
+	{JPC_MS_QCD, JPC_MH | JPC_TPH, jpc_dec_process_qcd},
+	{JPC_MS_QCC, JPC_MH | JPC_TPH, jpc_dec_process_qcc},
+	{JPC_MS_POC, JPC_MH | JPC_TPH, jpc_dec_process_poc},
+	{JPC_MS_TLM, JPC_MH, 0},
+	{JPC_MS_PLM, JPC_MH, 0},
+	{JPC_MS_PLT, JPC_TPH, 0},
+	{JPC_MS_PPM, JPC_MH, jpc_dec_process_ppm},
+	{JPC_MS_PPT, JPC_TPH, jpc_dec_process_ppt},
+	{JPC_MS_SOP, 0, 0},
+	{JPC_MS_CRG, JPC_MH, jpc_dec_process_crg},
+	{JPC_MS_COM, JPC_MH | JPC_TPH, jpc_dec_process_com},
+	{0, JPC_MH | JPC_TPH, jpc_dec_process_unk}
+};
+
+/******************************************************************************\
+* The main entry point for the JPEG-2000 decoder.
+\******************************************************************************/
+
+jas_image_t *jpc_decode(jas_stream_t *in, char *optstr)
+{
+	jpc_dec_importopts_t opts;
+	jpc_dec_t *dec;
+	jas_image_t *image;
+
+	dec = 0;
+
+	if (jpc_dec_parseopts(optstr, &opts)) {
+		goto error;
+	}
+
+	jpc_initluts();
+
+	if (!(dec = jpc_dec_create(&opts, in))) {
+		goto error;
+	}
+
+	/* Do most of the work. */
+	if (jpc_dec_decode(dec)) {
+		goto error;
+	}
+
+	if (jas_image_numcmpts(dec->image) >= 3) {
+		jas_image_setcolorspace(dec->image, JAS_IMAGE_CS_RGB);
+		jas_image_setcmpttype(dec->image, 0,
+		  JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_RGB_R));
+		jas_image_setcmpttype(dec->image, 1,
+		  JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_RGB_G));
+		jas_image_setcmpttype(dec->image, 2,
+		  JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_RGB_B));
+	} else {
+		jas_image_setcolorspace(dec->image, JAS_IMAGE_CS_GRAY);
+		jas_image_setcmpttype(dec->image, 0,
+		  JAS_IMAGE_CT_COLOR(JAS_IMAGE_CT_GRAY_Y));
+	}
+
+	/* Save the return value. */
+	image = dec->image;
+
+	/* Stop the image from being discarded. */
+	dec->image = 0;
+
+	/* Destroy decoder. */
+	jpc_dec_destroy(dec);
+
+	return image;
+
+error:
+	if (dec) {
+		jpc_dec_destroy(dec);
+	}
+	return 0;
+}
+
+typedef enum {
+	OPT_MAXLYRS,
+	OPT_MAXPKTS,
+	OPT_DEBUG
+} optid_t;
+
+jas_taginfo_t decopts[] = {
+	{OPT_MAXLYRS, "maxlyrs"},
+	{OPT_MAXPKTS, "maxpkts"},
+	{OPT_DEBUG, "debug"},
+	{-1, 0}
+};
+
+static int jpc_dec_parseopts(char *optstr, jpc_dec_importopts_t *opts)
+{
+	jas_tvparser_t *tvp;
+
+	opts->debug = 0;
+	opts->maxlyrs = JPC_MAXLYRS;
+	opts->maxpkts = -1;
+
+	if (!(tvp = jas_tvparser_create(optstr ? optstr : ""))) {
+		return -1;
+	}
+
+	while (!jas_tvparser_next(tvp)) {
+		switch (jas_taginfo_nonull(jas_taginfos_lookup(decopts,
+		  jas_tvparser_gettag(tvp)))->id) {
+		case OPT_MAXLYRS:
+			opts->maxlyrs = atoi(jas_tvparser_getval(tvp));
+			break;
+		case OPT_DEBUG:
+			opts->debug = atoi(jas_tvparser_getval(tvp));
+			break;
+		case OPT_MAXPKTS:
+			opts->maxpkts = atoi(jas_tvparser_getval(tvp));
+			break;
+		default:
+			fprintf(stderr, "warning: ignoring invalid option %s\n",
+			  jas_tvparser_gettag(tvp));
+			break;
+		}
+	}
+
+	jas_tvparser_destroy(tvp);
+
+	return 0;
+}
+
+/******************************************************************************\
+* Code for table-driven code stream decoder.
+\******************************************************************************/
+
+static jpc_dec_mstabent_t *jpc_dec_mstab_lookup(uint_fast16_t id)
+{
+	jpc_dec_mstabent_t *mstabent;
+	for (mstabent = jpc_dec_mstab; mstabent->id != 0; ++mstabent) {
+		if (mstabent->id == id) {
+			break;
+		}
+	}
+	return mstabent;
+}
+
+static int jpc_dec_decode(jpc_dec_t *dec)
+{
+	jpc_ms_t *ms;
+	jpc_dec_mstabent_t *mstabent;
+	int ret;
+	jpc_cstate_t *cstate;
+
+	if (!(cstate = jpc_cstate_create())) {
+		return -1;
+	}
+	dec->cstate = cstate;
+
+	/* Initially, we should expect to encounter a SOC marker segment. */
+	dec->state = JPC_MHSOC;
+
+	for (;;) {
+
+		/* Get the next marker segment in the code stream. */
+		if (!(ms = jpc_getms(dec->in, cstate))) {
+			fprintf(stderr, "cannot get marker segment\n");
+			return -1;
+		}
+
+		mstabent = jpc_dec_mstab_lookup(ms->id);
+		assert(mstabent);
+
+		/* Ensure that this type of marker segment is permitted
+		  at this point in the code stream. */
+		if (!(dec->state & mstabent->validstates)) {
+			fprintf(stderr, "unexpected marker segment type\n");
+			jpc_ms_destroy(ms);
+			return -1;
+		}
+
+		/* Process the marker segment. */
+		if (mstabent->action) {
+			ret = (*mstabent->action)(dec, ms);
+		} else {
+			/* No explicit action is required. */
+			ret = 0;
+		}
+
+		/* Destroy the marker segment. */
+		jpc_ms_destroy(ms);
+
+		if (ret < 0) {
+			return -1;
+		} else if (ret > 0) {
+			break;
+		}
+
+	}
+
+	return 0;
+}
+
+static int jpc_dec_process_crg(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	uint_fast16_t cmptno;
+	jpc_dec_cmpt_t *cmpt;
+	jpc_crg_t *crg;
+
+	crg = &ms->parms.crg;
+	for (cmptno = 0, cmpt = dec->cmpts; cmptno < dec->numcomps; ++cmptno,
+	  ++cmpt) {
+		/* Ignore the information in the CRG marker segment for now.
+		  This information serves no useful purpose for decoding anyhow.
+		  Some other parts of the code need to be changed if these lines
+		  are uncommented.
+		cmpt->hsubstep = crg->comps[cmptno].hoff;
+		cmpt->vsubstep = crg->comps[cmptno].voff;
+		*/
+	}
+	return 0;
+}
+
+static int jpc_dec_process_soc(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	/* We should expect to encounter a SIZ marker segment next. */
+	dec->state = JPC_MHSIZ;
+
+	return 0;
+}
+
+static int jpc_dec_process_sot(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_dec_tile_t *tile;
+	jpc_sot_t *sot = &ms->parms.sot;
+	jas_image_cmptparm_t *compinfos;
+	jas_image_cmptparm_t *compinfo;
+	jpc_dec_cmpt_t *cmpt;
+	uint_fast16_t cmptno;
+
+	if (dec->state == JPC_MH) {
+
+		compinfos = jas_malloc(dec->numcomps * sizeof(jas_image_cmptparm_t));
+		assert(compinfos);
+		for (cmptno = 0, cmpt = dec->cmpts, compinfo = compinfos;
+		  cmptno < dec->numcomps; ++cmptno, ++cmpt, ++compinfo) {
+			compinfo->tlx = 0;
+			compinfo->tly = 0;
+			compinfo->prec = cmpt->prec;
+			compinfo->sgnd = cmpt->sgnd;
+			compinfo->width = cmpt->width;
+			compinfo->height = cmpt->height;
+			compinfo->hstep = cmpt->hstep;
+			compinfo->vstep = cmpt->vstep;
+		}
+
+		if (!(dec->image = jas_image_create(dec->numcomps, compinfos,
+		  JAS_IMAGE_CS_UNKNOWN))) {
+			return -1;
+		}
+		jas_free(compinfos);
+
+		/* Is the packet header information stored in PPM marker segments in
+		  the main header? */
+		if (dec->ppmstab) {
+			/* Convert the PPM marker segment data into a collection of streams
+			  (one stream per tile-part). */
+			if (!(dec->pkthdrstreams = jpc_ppmstabtostreams(dec->ppmstab))) {
+				abort();
+			}
+			jpc_ppxstab_destroy(dec->ppmstab);
+			dec->ppmstab = 0;
+		}
+	}
+
+	if (sot->len > 0) {
+		dec->curtileendoff = jas_stream_getrwcount(dec->in) - ms->len -
+		  4 + sot->len;
+	} else {
+		dec->curtileendoff = 0;
+	}
+
+	if (sot->tileno > dec->numtiles) {
+		fprintf(stderr, "invalid tile number in SOT marker segment\n");
+		return -1;
+	}
+	/* Set the current tile. */
+	dec->curtile = &dec->tiles[sot->tileno];
+	tile = dec->curtile;
+	/* Ensure that this is the expected part number. */
+	if (sot->partno != tile->partno) {
+		return -1;
+	}
+	if (tile->numparts > 0 && sot->partno >= tile->numparts) {
+		return -1;
+	}
+	if (!tile->numparts && sot->numparts > 0) {
+		tile->numparts = sot->numparts;
+	}
+
+	tile->pptstab = 0;
+
+	switch (tile->state) {
+	case JPC_TILE_INIT:
+		/* This is the first tile-part for this tile. */
+		tile->state = JPC_TILE_ACTIVE;
+		assert(!tile->cp);
+		if (!(tile->cp = jpc_dec_cp_copy(dec->cp))) {
+			return -1;
+		}
+		jpc_dec_cp_resetflags(dec->cp);
+		break;
+	default:
+		if (sot->numparts == sot->partno - 1) {
+			tile->state = JPC_TILE_ACTIVELAST;
+		}
+		break;
+	}
+
+	/* Note: We do not increment the expected tile-part number until
+	  all processing for this tile-part is complete. */
+
+	/* We should expect to encounter other tile-part header marker
+	  segments next. */
+	dec->state = JPC_TPH;
+
+	return 0;
+}
+
+static int jpc_dec_process_sod(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_dec_tile_t *tile;
+	int pos;
+
+	if (!(tile = dec->curtile)) {
+		return -1;
+	}
+
+	if (!tile->partno) {
+		if (!jpc_dec_cp_isvalid(tile->cp)) {
+			return -1;
+		}
+		jpc_dec_cp_prepare(tile->cp);
+		if (jpc_dec_tileinit(dec, tile)) {
+			return -1;
+		}
+	}
+
+	/* Are packet headers stored in the main header or tile-part header? */
+	if (dec->pkthdrstreams) {
+		/* Get the stream containing the packet header data for this
+		  tile-part. */
+		if (!(tile->pkthdrstream = jpc_streamlist_remove(dec->pkthdrstreams, 0))) {
+			return -1;
+		}
+	}
+
+	if (tile->pptstab) {
+		if (!tile->pkthdrstream) {
+			if (!(tile->pkthdrstream = jas_stream_memopen(0, 0))) {
+				return -1;
+			}
+		}
+		pos = jas_stream_tell(tile->pkthdrstream);
+		jas_stream_seek(tile->pkthdrstream, 0, SEEK_END);
+		if (jpc_pptstabwrite(tile->pkthdrstream, tile->pptstab)) {
+			return -1;
+		}
+		jas_stream_seek(tile->pkthdrstream, pos, SEEK_SET);
+		jpc_ppxstab_destroy(tile->pptstab);
+		tile->pptstab = 0;
+	}
+
+	if (jas_getdbglevel() >= 10) {
+		jpc_dec_dump(dec, stderr);
+	}
+
+	if (jpc_dec_decodepkts(dec, (tile->pkthdrstream) ? tile->pkthdrstream :
+	  dec->in, dec->in)) {
+		fprintf(stderr, "jpc_dec_decodepkts failed\n");
+		return -1;
+	}
+
+	/* Gobble any unconsumed tile data. */
+	if (dec->curtileendoff > 0) {
+		uint_fast32_t curoff;
+		uint_fast32_t n;
+		curoff = jas_stream_getrwcount(dec->in);
+		if (curoff < dec->curtileendoff) {
+			n = dec->curtileendoff - curoff;
+			fprintf(stderr,
+			  "warning: ignoring trailing garbage (%lu bytes)\n",
+			  (unsigned long) n);
+
+			while (n-- > 0) {
+				if (jas_stream_getc(dec->in) == EOF) {
+					fprintf(stderr, "read error\n");
+					return -1;
+				}
+			}
+		} else if (curoff > dec->curtileendoff) {
+			fprintf(stderr,
+			  "warning: not enough tile data (%lu bytes)\n",
+			  (unsigned long) curoff - dec->curtileendoff);
+		}
+
+	}
+
+	if (tile->numparts > 0 && tile->partno == tile->numparts - 1) {
+		if (jpc_dec_tiledecode(dec, tile)) {
+			return -1;
+		}
+		jpc_dec_tilefini(dec, tile);
+	}
+
+	dec->curtile = 0;
+
+	/* Increment the expected tile-part number. */
+	++tile->partno;
+
+	/* We should expect to encounter a SOT marker segment next. */
+	dec->state = JPC_TPHSOT;
+
+	return 0;
+}
+
+static int jpc_dec_tileinit(jpc_dec_t *dec, jpc_dec_tile_t *tile)
+{
+	jpc_dec_tcomp_t *tcomp;
+	uint_fast16_t compno;
+	int rlvlno;
+	jpc_dec_rlvl_t *rlvl;
+	jpc_dec_band_t *band;
+	jpc_dec_prc_t *prc;
+	int bndno;
+	jpc_tsfb_band_t *bnd;
+	int bandno;
+	jpc_dec_ccp_t *ccp;
+	int prccnt;
+	jpc_dec_cblk_t *cblk;
+	int cblkcnt;
+	uint_fast32_t tlprcxstart;
+	uint_fast32_t tlprcystart;
+	uint_fast32_t brprcxend;
+	uint_fast32_t brprcyend;
+	uint_fast32_t tlcbgxstart;
+	uint_fast32_t tlcbgystart;
+	uint_fast32_t brcbgxend;
+	uint_fast32_t brcbgyend;
+	uint_fast32_t cbgxstart;
+	uint_fast32_t cbgystart;
+	uint_fast32_t cbgxend;
+	uint_fast32_t cbgyend;
+	uint_fast32_t tlcblkxstart;
+	uint_fast32_t tlcblkystart;
+	uint_fast32_t brcblkxend;
+	uint_fast32_t brcblkyend;
+	uint_fast32_t cblkxstart;
+	uint_fast32_t cblkystart;
+	uint_fast32_t cblkxend;
+	uint_fast32_t cblkyend;
+	uint_fast32_t tmpxstart;
+	uint_fast32_t tmpystart;
+	uint_fast32_t tmpxend;
+	uint_fast32_t tmpyend;
+	jpc_dec_cp_t *cp;
+	jpc_tsfb_band_t bnds[64];
+	jpc_pchg_t *pchg;
+	int pchgno;
+	jpc_dec_cmpt_t *cmpt;
+
+	cp = tile->cp;
+	tile->realmode = 0;
+	if (cp->mctid == JPC_MCT_ICT) {
+		tile->realmode = 1;
+	}
+
+	for (compno = 0, tcomp = tile->tcomps, cmpt = dec->cmpts; compno <
+	  dec->numcomps; ++compno, ++tcomp, ++cmpt) {
+		ccp = &tile->cp->ccps[compno];
+		if (ccp->qmfbid == JPC_COX_INS) {
+			tile->realmode = 1;
+		}
+		tcomp->numrlvls = ccp->numrlvls;
+		if (!(tcomp->rlvls = jas_malloc(tcomp->numrlvls *
+		  sizeof(jpc_dec_rlvl_t)))) {
+			return -1;
+		}
+		if (!(tcomp->data = jas_seq2d_create(JPC_CEILDIV(tile->xstart,
+		  cmpt->hstep), JPC_CEILDIV(tile->ystart, cmpt->vstep),
+		  JPC_CEILDIV(tile->xend, cmpt->hstep), JPC_CEILDIV(tile->yend,
+		  cmpt->vstep)))) {
+			return -1;
+		}
+		if (!(tcomp->tsfb = jpc_cod_gettsfb(ccp->qmfbid,
+		  tcomp->numrlvls - 1))) {
+			return -1;
+		}
+{
+	jpc_tsfb_getbands(tcomp->tsfb, jas_seq2d_xstart(tcomp->data), jas_seq2d_ystart(tcomp->data), jas_seq2d_xend(tcomp->data), jas_seq2d_yend(tcomp->data), bnds);
+}
+		for (rlvlno = 0, rlvl = tcomp->rlvls; rlvlno < tcomp->numrlvls;
+		  ++rlvlno, ++rlvl) {
+rlvl->bands = 0;
+			rlvl->xstart = JPC_CEILDIVPOW2(tcomp->xstart,
+			  tcomp->numrlvls - 1 - rlvlno);
+			rlvl->ystart = JPC_CEILDIVPOW2(tcomp->ystart,
+			  tcomp->numrlvls - 1 - rlvlno);
+			rlvl->xend = JPC_CEILDIVPOW2(tcomp->xend,
+			  tcomp->numrlvls - 1 - rlvlno);
+			rlvl->yend = JPC_CEILDIVPOW2(tcomp->yend,
+			  tcomp->numrlvls - 1 - rlvlno);
+			rlvl->prcwidthexpn = ccp->prcwidthexpns[rlvlno];
+			rlvl->prcheightexpn = ccp->prcheightexpns[rlvlno];
+			tlprcxstart = JPC_FLOORDIVPOW2(rlvl->xstart,
+			  rlvl->prcwidthexpn) << rlvl->prcwidthexpn;
+			tlprcystart = JPC_FLOORDIVPOW2(rlvl->ystart,
+			  rlvl->prcheightexpn) << rlvl->prcheightexpn;
+			brprcxend = JPC_CEILDIVPOW2(rlvl->xend,
+			  rlvl->prcwidthexpn) << rlvl->prcwidthexpn;
+			brprcyend = JPC_CEILDIVPOW2(rlvl->yend,
+			  rlvl->prcheightexpn) << rlvl->prcheightexpn;
+			rlvl->numhprcs = (brprcxend - tlprcxstart) >>
+			  rlvl->prcwidthexpn;
+			rlvl->numvprcs = (brprcyend - tlprcystart) >>
+			  rlvl->prcheightexpn;
+			rlvl->numprcs = rlvl->numhprcs * rlvl->numvprcs;
+
+			if (rlvl->xstart >= rlvl->xend || rlvl->ystart >= rlvl->yend) {
+				rlvl->bands = 0;
+				rlvl->numprcs = 0;
+				rlvl->numhprcs = 0;
+				rlvl->numvprcs = 0;
+				continue;
+			}	
+			if (!rlvlno) {
+				tlcbgxstart = tlprcxstart;
+				tlcbgystart = tlprcystart;
+				brcbgxend = brprcxend;
+				brcbgyend = brprcyend;
+				rlvl->cbgwidthexpn = rlvl->prcwidthexpn;
+				rlvl->cbgheightexpn = rlvl->prcheightexpn;
+			} else {
+				tlcbgxstart = JPC_CEILDIVPOW2(tlprcxstart, 1);
+				tlcbgystart = JPC_CEILDIVPOW2(tlprcystart, 1);
+				brcbgxend = JPC_CEILDIVPOW2(brprcxend, 1);
+				brcbgyend = JPC_CEILDIVPOW2(brprcyend, 1);
+				rlvl->cbgwidthexpn = rlvl->prcwidthexpn - 1;
+				rlvl->cbgheightexpn = rlvl->prcheightexpn - 1;
+			}
+			rlvl->cblkwidthexpn = JAS_MIN(ccp->cblkwidthexpn,
+			  rlvl->cbgwidthexpn);
+			rlvl->cblkheightexpn = JAS_MIN(ccp->cblkheightexpn,
+			  rlvl->cbgheightexpn);
+
+			rlvl->numbands = (!rlvlno) ? 1 : 3;
+			if (!(rlvl->bands = jas_malloc(rlvl->numbands *
+			  sizeof(jpc_dec_band_t)))) {
+				return -1;
+			}
+			for (bandno = 0, band = rlvl->bands;
+			  bandno < rlvl->numbands; ++bandno, ++band) {
+				bndno = (!rlvlno) ? 0 : (3 * (rlvlno - 1) +
+				  bandno + 1);
+				bnd = &bnds[bndno];
+
+				band->orient = bnd->orient;
+				band->stepsize = ccp->stepsizes[bndno];
+				band->analgain = JPC_NOMINALGAIN(ccp->qmfbid,
+				  tcomp->numrlvls - 1, rlvlno, band->orient);
+				band->absstepsize = jpc_calcabsstepsize(band->stepsize,
+				  cmpt->prec + band->analgain);
+				band->numbps = ccp->numguardbits +
+				  JPC_QCX_GETEXPN(band->stepsize) - 1;
+				band->roishift = (ccp->roishift + band->numbps >= JPC_PREC) ?
+				  (JPC_PREC - 1 - band->numbps) : ccp->roishift;
+				band->data = 0;
+				band->prcs = 0;
+				if (bnd->xstart == bnd->xend || bnd->ystart == bnd->yend) {
+					continue;
+				}
+				if (!(band->data = jas_seq2d_create(0, 0, 0, 0))) {
+					return -1;
+				}
+				jas_seq2d_bindsub(band->data, tcomp->data, bnd->locxstart, bnd->locystart, bnd->locxend, bnd->locyend);
+				jas_seq2d_setshift(band->data, bnd->xstart, bnd->ystart);
+
+				assert(rlvl->numprcs);
+
+				if (!(band->prcs = jas_malloc(rlvl->numprcs * sizeof(jpc_dec_prc_t)))) {
+					return -1;
+				}
+
+/************************************************/
+	cbgxstart = tlcbgxstart;
+	cbgystart = tlcbgystart;
+	for (prccnt = rlvl->numprcs, prc = band->prcs;
+	  prccnt > 0; --prccnt, ++prc) {
+		cbgxend = cbgxstart + (1 << rlvl->cbgwidthexpn);
+		cbgyend = cbgystart + (1 << rlvl->cbgheightexpn);
+		prc->xstart = JAS_MAX(cbgxstart, jas_seq2d_xstart(band->data));
+		prc->ystart = JAS_MAX(cbgystart, jas_seq2d_ystart(band->data));
+		prc->xend = JAS_MIN(cbgxend, jas_seq2d_xend(band->data));
+		prc->yend = JAS_MIN(cbgyend, jas_seq2d_yend(band->data));
+		if (prc->xend > prc->xstart && prc->yend > prc->ystart) {
+			tlcblkxstart = JPC_FLOORDIVPOW2(prc->xstart,
+			  rlvl->cblkwidthexpn) << rlvl->cblkwidthexpn;
+			tlcblkystart = JPC_FLOORDIVPOW2(prc->ystart,
+			  rlvl->cblkheightexpn) << rlvl->cblkheightexpn;
+			brcblkxend = JPC_CEILDIVPOW2U(prc->xend,
+			  rlvl->cblkwidthexpn) << rlvl->cblkwidthexpn;
+			brcblkyend = JPC_CEILDIVPOW2U(prc->yend,
+			  rlvl->cblkheightexpn) << rlvl->cblkheightexpn;
+			prc->numhcblks = (brcblkxend - tlcblkxstart) >>
+			  rlvl->cblkwidthexpn;
+			prc->numvcblks = (brcblkyend - tlcblkystart) >>
+			  rlvl->cblkheightexpn;
+			prc->numcblks = prc->numhcblks * prc->numvcblks;
+			assert(prc->numcblks > 0);
+
+			if (!(prc->incltagtree = jpc_tagtree_create(prc->numhcblks, prc->numvcblks))) {
+				return -1;
+			}
+			if (!(prc->numimsbstagtree = jpc_tagtree_create(prc->numhcblks, prc->numvcblks))) {
+				return -1;
+			}
+			if (!(prc->cblks = jas_malloc(prc->numcblks * sizeof(jpc_dec_cblk_t)))) {
+				return -1;
+			}
+
+			cblkxstart = cbgxstart;
+			cblkystart = cbgystart;
+			for (cblkcnt = prc->numcblks, cblk = prc->cblks; cblkcnt > 0;) {
+				cblkxend = cblkxstart + (1 << rlvl->cblkwidthexpn);
+				cblkyend = cblkystart + (1 << rlvl->cblkheightexpn);
+				tmpxstart = JAS_MAX(cblkxstart, prc->xstart);
+				tmpystart = JAS_MAX(cblkystart, prc->ystart);
+				tmpxend = JAS_MIN(cblkxend, prc->xend);
+				tmpyend = JAS_MIN(cblkyend, prc->yend);
+				if (tmpxend > tmpxstart && tmpyend > tmpystart) {
+					cblk->firstpassno = -1;
+					cblk->mqdec = 0;
+					cblk->nulldec = 0;
+					cblk->flags = 0;
+					cblk->numpasses = 0;
+					cblk->segs.head = 0;
+					cblk->segs.tail = 0;
+					cblk->curseg = 0;
+					cblk->numimsbs = 0;
+					cblk->numlenbits = 3;
+					cblk->flags = 0;
+					if (!(cblk->data = jas_seq2d_create(0, 0, 0, 0))) {
+						return -1;
+					}
+					jas_seq2d_bindsub(cblk->data, band->data, tmpxstart, tmpystart, tmpxend, tmpyend);
+					++cblk;
+					--cblkcnt;
+				}
+				cblkxstart += 1 << rlvl->cblkwidthexpn;
+				if (cblkxstart >= cbgxend) {
+					cblkxstart = cbgxstart;
+					cblkystart += 1 << rlvl->cblkheightexpn;
+				}
+			}
+
+		} else {
+			prc->cblks = 0;
+			prc->incltagtree = 0;
+			prc->numimsbstagtree = 0;
+		}
+		cbgxstart += 1 << rlvl->cbgwidthexpn;
+		if (cbgxstart >= brcbgxend) {
+			cbgxstart = tlcbgxstart;
+			cbgystart += 1 << rlvl->cbgheightexpn;
+		}
+
+	}
+/********************************************/
+			}
+		}
+	}
+
+if (!(tile->pi = jpc_dec_pi_create(dec, tile)))
+{
+	return -1;
+}
+
+	for (pchgno = 0; pchgno < jpc_pchglist_numpchgs(tile->cp->pchglist);
+	  ++pchgno) {
+		pchg = jpc_pchg_copy(jpc_pchglist_get(tile->cp->pchglist, pchgno));
+		assert(pchg);
+		jpc_pi_addpchg(tile->pi, pchg);
+	}
+	jpc_pi_init(tile->pi);
+
+	return 0;
+}
+
+static int jpc_dec_tilefini(jpc_dec_t *dec, jpc_dec_tile_t *tile)
+{
+	jpc_dec_tcomp_t *tcomp;
+	int compno;
+	int bandno;
+	int rlvlno;
+	jpc_dec_band_t *band;
+	jpc_dec_rlvl_t *rlvl;
+	int prcno;
+	jpc_dec_prc_t *prc;
+	jpc_dec_seg_t *seg;
+	jpc_dec_cblk_t *cblk;
+	int cblkno;
+
+if (tile->tcomps) {
+
+	for (compno = 0, tcomp = tile->tcomps; compno < dec->numcomps;
+	  ++compno, ++tcomp) {
+		for (rlvlno = 0, rlvl = tcomp->rlvls; rlvlno < tcomp->numrlvls;
+		  ++rlvlno, ++rlvl) {
+if (!rlvl->bands) {
+	continue;
+}
+			for (bandno = 0, band = rlvl->bands; bandno < rlvl->numbands; ++bandno, ++band) {
+if (band->prcs) {
+				for (prcno = 0, prc = band->prcs; prcno <
+				  rlvl->numprcs; ++prcno, ++prc) {
+if (!prc->cblks) {
+	continue;
+}
+					for (cblkno = 0, cblk = prc->cblks; cblkno < prc->numcblks; ++cblkno, ++cblk) {
+
+	while (cblk->segs.head) {
+		seg = cblk->segs.head;
+		jpc_seglist_remove(&cblk->segs, seg);
+		jpc_seg_destroy(seg);
+	}
+	jas_matrix_destroy(cblk->data);
+	if (cblk->mqdec) {
+		jpc_mqdec_destroy(cblk->mqdec);
+	}
+	if (cblk->nulldec) {
+		jpc_bitstream_close(cblk->nulldec);
+	}
+	if (cblk->flags) {
+		jas_matrix_destroy(cblk->flags);
+	}
+					}
+					if (prc->incltagtree) {
+						jpc_tagtree_destroy(prc->incltagtree);
+					}
+					if (prc->numimsbstagtree) {
+						jpc_tagtree_destroy(prc->numimsbstagtree);
+					}
+					if (prc->cblks) {
+						jas_free(prc->cblks);
+					}
+				}
+}
+				if (band->data) {
+					jas_matrix_destroy(band->data);
+				}
+				if (band->prcs) {
+					jas_free(band->prcs);
+				}
+			}
+			if (rlvl->bands) {
+				jas_free(rlvl->bands);
+			}
+		}
+		if (tcomp->rlvls) {
+			jas_free(tcomp->rlvls);
+		}
+		if (tcomp->data) {
+			jas_matrix_destroy(tcomp->data);
+		}
+		if (tcomp->tsfb) {
+			jpc_tsfb_destroy(tcomp->tsfb);
+		}
+	}
+}
+	if (tile->cp) {
+		jpc_dec_cp_destroy(tile->cp);
+		tile->cp = 0;
+	}
+	if (tile->tcomps) {
+		jas_free(tile->tcomps);
+		tile->tcomps = 0;
+	}
+	if (tile->pi) {
+		jpc_pi_destroy(tile->pi);
+		tile->pi = 0;
+	}
+	if (tile->pkthdrstream) {
+		jas_stream_close(tile->pkthdrstream);
+		tile->pkthdrstream = 0;
+	}
+	if (tile->pptstab) {
+		jpc_ppxstab_destroy(tile->pptstab);
+		tile->pptstab = 0;
+	}
+
+	tile->state = JPC_TILE_DONE;
+
+	return 0;
+}
+
+static int jpc_dec_tiledecode(jpc_dec_t *dec, jpc_dec_tile_t *tile)
+{
+	int i;
+	int j;
+	jpc_dec_tcomp_t *tcomp;
+	jpc_dec_rlvl_t *rlvl;
+	jpc_dec_band_t *band;
+	int compno;
+	int rlvlno;
+	int bandno;
+	int adjust;
+	int v;
+	jpc_dec_ccp_t *ccp;
+	jpc_dec_cmpt_t *cmpt;
+
+	if (jpc_dec_decodecblks(dec, tile)) {
+		fprintf(stderr, "jpc_dec_decodecblks failed\n");
+		return -1;
+	}
+
+	/* Perform dequantization. */
+	for (compno = 0, tcomp = tile->tcomps; compno < dec->numcomps;
+	  ++compno, ++tcomp) {
+		ccp = &tile->cp->ccps[compno];
+		for (rlvlno = 0, rlvl = tcomp->rlvls; rlvlno < tcomp->numrlvls;
+		  ++rlvlno, ++rlvl) {
+			if (!rlvl->bands) {
+				continue;
+			}
+			for (bandno = 0, band = rlvl->bands;
+			  bandno < rlvl->numbands; ++bandno, ++band) {
+				if (!band->data) {
+					continue;
+				}
+				jpc_undo_roi(band->data, band->roishift, ccp->roishift -
+				  band->roishift, band->numbps);
+				if (tile->realmode) {
+					jas_matrix_asl(band->data, JPC_FIX_FRACBITS);
+					jpc_dequantize(band->data, band->absstepsize);
+				}
+
+			}
+		}
+	}
+
+	/* Apply an inverse wavelet transform if necessary. */
+	for (compno = 0, tcomp = tile->tcomps; compno < dec->numcomps;
+	  ++compno, ++tcomp) {
+		ccp = &tile->cp->ccps[compno];
+		jpc_tsfb_synthesize(tcomp->tsfb, ((ccp->qmfbid ==
+		  JPC_COX_RFT) ? JPC_TSFB_RITIMODE : 0), tcomp->data);
+	}
+
+
+	/* Apply an inverse intercomponent transform if necessary. */
+	switch (tile->cp->mctid) {
+	case JPC_MCT_RCT:
+		assert(dec->numcomps == 3);
+		jpc_irct(tile->tcomps[0].data, tile->tcomps[1].data,
+		  tile->tcomps[2].data);
+		break;
+	case JPC_MCT_ICT:
+		assert(dec->numcomps == 3);
+		jpc_iict(tile->tcomps[0].data, tile->tcomps[1].data,
+		  tile->tcomps[2].data);
+		break;
+	}
+
+	/* Perform rounding and convert to integer values. */
+	if (tile->realmode) {
+		for (compno = 0, tcomp = tile->tcomps; compno < dec->numcomps;
+		  ++compno, ++tcomp) {
+			for (i = 0; i < jas_matrix_numrows(tcomp->data); ++i) {
+				for (j = 0; j < jas_matrix_numcols(tcomp->data); ++j) {
+					v = jas_matrix_get(tcomp->data, i, j);
+					v = jpc_fix_round(v);
+					jas_matrix_set(tcomp->data, i, j, jpc_fixtoint(v));
+				}
+			}
+		}
+	}
+
+	/* Perform level shift. */
+	for (compno = 0, tcomp = tile->tcomps, cmpt = dec->cmpts; compno <
+	  dec->numcomps; ++compno, ++tcomp, ++cmpt) {
+		adjust = cmpt->sgnd ? 0 : (1 << (cmpt->prec - 1));
+		for (i = 0; i < jas_matrix_numrows(tcomp->data); ++i) {
+			for (j = 0; j < jas_matrix_numcols(tcomp->data); ++j) {
+				*jas_matrix_getref(tcomp->data, i, j) += adjust;
+			}
+		}
+	}
+
+	/* Perform clipping. */
+	for (compno = 0, tcomp = tile->tcomps, cmpt = dec->cmpts; compno <
+	  dec->numcomps; ++compno, ++tcomp, ++cmpt) {
+		jpc_fix_t mn;
+		jpc_fix_t mx;
+		mn = cmpt->sgnd ? (-(1 << (cmpt->prec - 1))) : (0);
+		mx = cmpt->sgnd ? ((1 << (cmpt->prec - 1)) - 1) : ((1 <<
+		  cmpt->prec) - 1);
+		jas_matrix_clip(tcomp->data, mn, mx);
+	}
+
+	/* XXX need to free tsfb struct */
+
+	/* Write the data for each component of the image. */
+	for (compno = 0, tcomp = tile->tcomps, cmpt = dec->cmpts; compno <
+	  dec->numcomps; ++compno, ++tcomp, ++cmpt) {
+		if (jas_image_writecmpt(dec->image, compno, tcomp->xstart -
+		  JPC_CEILDIV(dec->xstart, cmpt->hstep), tcomp->ystart -
+		  JPC_CEILDIV(dec->ystart, cmpt->vstep), jas_matrix_numcols(
+		  tcomp->data), jas_matrix_numrows(tcomp->data), tcomp->data)) {
+			fprintf(stderr, "write component failed\n");
+			return -4;
+		}
+	}
+
+	return 0;
+}
+
+static int jpc_dec_process_eoc(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	int tileno;
+	jpc_dec_tile_t *tile;
+	for (tileno = 0, tile = dec->tiles; tileno < dec->numtiles; ++tileno,
+	  ++tile) {
+		if (tile->state == JPC_TILE_ACTIVE) {
+			if (jpc_dec_tiledecode(dec, tile)) {
+				return -1;
+			}
+		}
+		jpc_dec_tilefini(dec, tile);
+	}
+
+	/* We are done processing the code stream. */
+	dec->state = JPC_MT;
+
+	return 1;
+}
+
+static int jpc_dec_process_siz(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_siz_t *siz = &ms->parms.siz;
+	uint_fast16_t compno;
+	uint_fast32_t tileno;
+	jpc_dec_tile_t *tile;
+	jpc_dec_tcomp_t *tcomp;
+	uint_fast32_t htileno;
+	uint_fast32_t vtileno;
+	jpc_dec_cmpt_t *cmpt;
+
+	dec->xstart = siz->xoff;
+	dec->ystart = siz->yoff;
+	dec->xend = siz->width;
+	dec->yend = siz->height;
+	dec->tilewidth = siz->tilewidth;
+	dec->tileheight = siz->tileheight;
+	dec->tilexoff = siz->tilexoff;
+	dec->tileyoff = siz->tileyoff;
+	dec->numcomps = siz->numcomps;
+	if (!(dec->cp = jpc_dec_cp_create(dec->numcomps))) {
+		return -1;
+	}
+
+	if (!(dec->cmpts = jas_malloc(dec->numcomps * sizeof(jpc_dec_cmpt_t)))) {
+		return -1;
+	}
+
+	for (compno = 0, cmpt = dec->cmpts; compno < dec->numcomps; ++compno,
+	  ++cmpt) {
+		cmpt->prec = siz->comps[compno].prec;
+		cmpt->sgnd = siz->comps[compno].sgnd;
+		cmpt->hstep = siz->comps[compno].hsamp;
+		cmpt->vstep = siz->comps[compno].vsamp;
+		cmpt->width = JPC_CEILDIV(dec->xend, cmpt->hstep) -
+		  JPC_CEILDIV(dec->xstart, cmpt->hstep);
+		cmpt->height = JPC_CEILDIV(dec->yend, cmpt->vstep) -
+		  JPC_CEILDIV(dec->ystart, cmpt->vstep);
+		cmpt->hsubstep = 0;
+		cmpt->vsubstep = 0;
+	}
+
+	dec->image = 0;
+
+	dec->numhtiles = JPC_CEILDIV(dec->xend - dec->tilexoff, dec->tilewidth);
+	dec->numvtiles = JPC_CEILDIV(dec->yend - dec->tileyoff, dec->tileheight);
+	dec->numtiles = dec->numhtiles * dec->numvtiles;
+	if (!(dec->tiles = jas_malloc(dec->numtiles * sizeof(jpc_dec_tile_t)))) {
+		return -1;
+	}
+
+	for (tileno = 0, tile = dec->tiles; tileno < dec->numtiles; ++tileno,
+	  ++tile) {
+		htileno = tileno % dec->numhtiles;
+		vtileno = tileno / dec->numhtiles;
+		tile->realmode = 0;
+		tile->state = JPC_TILE_INIT;
+		tile->xstart = JAS_MAX(dec->tilexoff + htileno * dec->tilewidth,
+		  dec->xstart);
+		tile->ystart = JAS_MAX(dec->tileyoff + vtileno * dec->tileheight,
+		  dec->ystart);
+		tile->xend = JAS_MIN(dec->tilexoff + (htileno + 1) *
+		  dec->tilewidth, dec->xend);
+		tile->yend = JAS_MIN(dec->tileyoff + (vtileno + 1) *
+		  dec->tileheight, dec->yend);
+		tile->numparts = 0;
+		tile->partno = 0;
+		tile->pkthdrstream = 0;
+		tile->pkthdrstreampos = 0;
+		tile->pptstab = 0;
+		tile->cp = 0;
+		if (!(tile->tcomps = jas_malloc(dec->numcomps *
+		  sizeof(jpc_dec_tcomp_t)))) {
+			return -1;
+		}
+		for (compno = 0, cmpt = dec->cmpts, tcomp = tile->tcomps;
+		  compno < dec->numcomps; ++compno, ++cmpt, ++tcomp) {
+			tcomp->rlvls = 0;
+			tcomp->data = 0;
+			tcomp->xstart = JPC_CEILDIV(tile->xstart, cmpt->hstep);
+			tcomp->ystart = JPC_CEILDIV(tile->ystart, cmpt->vstep);
+			tcomp->xend = JPC_CEILDIV(tile->xend, cmpt->hstep);
+			tcomp->yend = JPC_CEILDIV(tile->yend, cmpt->vstep);
+			tcomp->tsfb = 0;
+		}
+	}
+
+	dec->pkthdrstreams = 0;
+
+	/* We should expect to encounter other main header marker segments
+	  or an SOT marker segment next. */
+	dec->state = JPC_MH;
+
+	return 0;
+}
+
+static int jpc_dec_process_cod(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_cod_t *cod = &ms->parms.cod;
+	jpc_dec_tile_t *tile;
+
+	switch (dec->state) {
+	case JPC_MH:
+		jpc_dec_cp_setfromcod(dec->cp, cod);
+		break;
+	case JPC_TPH:
+		if (!(tile = dec->curtile)) {
+			return -1;
+		}
+		if (tile->partno != 0) {
+			return -1;
+		}
+		jpc_dec_cp_setfromcod(tile->cp, cod);
+		break;
+	}
+	return 0;
+}
+
+static int jpc_dec_process_coc(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_coc_t *coc = &ms->parms.coc;
+	jpc_dec_tile_t *tile;
+
+	if (coc->compno > dec->numcomps) {
+		fprintf(stderr,
+		  "invalid component number in COC marker segment\n");
+		return -1;
+	}
+	switch (dec->state) {
+	case JPC_MH:
+		jpc_dec_cp_setfromcoc(dec->cp, coc);
+		break;
+	case JPC_TPH:
+		if (!(tile = dec->curtile)) {
+			return -1;
+		}
+		if (tile->partno > 0) {
+			return -1;
+		}
+		jpc_dec_cp_setfromcoc(tile->cp, coc);
+		break;
+	}
+	return 0;
+}
+
+static int jpc_dec_process_rgn(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_rgn_t *rgn = &ms->parms.rgn;
+	jpc_dec_tile_t *tile;
+
+	if (rgn->compno > dec->numcomps) {
+		fprintf(stderr,
+		  "invalid component number in RGN marker segment\n");
+		return -1;
+	}
+	switch (dec->state) {
+	case JPC_MH:
+		jpc_dec_cp_setfromrgn(dec->cp, rgn);
+		break;
+	case JPC_TPH:
+		if (!(tile = dec->curtile)) {
+			return -1;
+		}
+		if (tile->partno > 0) {
+			return -1;
+		}
+		jpc_dec_cp_setfromrgn(tile->cp, rgn);
+		break;
+	}
+
+	return 0;
+}
+
+static int jpc_dec_process_qcd(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_qcd_t *qcd = &ms->parms.qcd;
+	jpc_dec_tile_t *tile;
+
+	switch (dec->state) {
+	case JPC_MH:
+		jpc_dec_cp_setfromqcd(dec->cp, qcd);
+		break;
+	case JPC_TPH:
+		if (!(tile = dec->curtile)) {
+			return -1;
+		}
+		if (tile->partno > 0) {
+			return -1;
+		}
+		jpc_dec_cp_setfromqcd(tile->cp, qcd);
+		break;
+	}
+	return 0;
+}
+
+static int jpc_dec_process_qcc(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_qcc_t *qcc = &ms->parms.qcc;
+	jpc_dec_tile_t *tile;
+
+	if (qcc->compno > dec->numcomps) {
+		fprintf(stderr,
+		  "invalid component number in QCC marker segment\n");
+		return -1;
+	}
+	switch (dec->state) {
+	case JPC_MH:
+		jpc_dec_cp_setfromqcc(dec->cp, qcc);
+		break;
+	case JPC_TPH:
+		if (!(tile = dec->curtile)) {
+			return -1;
+		}
+		if (tile->partno > 0) {
+			return -1;
+		}
+		jpc_dec_cp_setfromqcc(tile->cp, qcc);
+		break;
+	}
+	return 0;
+}
+
+static int jpc_dec_process_poc(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_poc_t *poc = &ms->parms.poc;
+	jpc_dec_tile_t *tile;
+	switch (dec->state) {
+	case JPC_MH:
+		if (jpc_dec_cp_setfrompoc(dec->cp, poc, 1)) {
+			return -1;
+		}
+		break;
+	case JPC_TPH:
+		if (!(tile = dec->curtile)) {
+			return -1;
+		}
+		if (!tile->partno) {
+			if (jpc_dec_cp_setfrompoc(tile->cp, poc, (!tile->partno))) {
+				return -1;
+			}
+		} else {
+			jpc_pi_addpchgfrompoc(tile->pi, poc);
+		}
+		break;
+	}
+	return 0;
+}
+
+static int jpc_dec_process_ppm(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_ppm_t *ppm = &ms->parms.ppm;
+	jpc_ppxstabent_t *ppmstabent;
+
+	if (!dec->ppmstab) {
+		if (!(dec->ppmstab = jpc_ppxstab_create())) {
+			return -1;
+		}
+	}
+
+	if (!(ppmstabent = jpc_ppxstabent_create())) {
+		return -1;
+	}
+	ppmstabent->ind = ppm->ind;
+	ppmstabent->data = ppm->data;
+	ppm->data = 0;
+	ppmstabent->len = ppm->len;
+	if (jpc_ppxstab_insert(dec->ppmstab, ppmstabent)) {
+		return -1;
+	}
+	return 0;
+}
+
+static int jpc_dec_process_ppt(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	jpc_ppt_t *ppt = &ms->parms.ppt;
+	jpc_dec_tile_t *tile;
+	jpc_ppxstabent_t *pptstabent;
+
+	tile = dec->curtile;
+	if (!tile->pptstab) {
+		if (!(tile->pptstab = jpc_ppxstab_create())) {
+			return -1;
+		}
+	}
+	if (!(pptstabent = jpc_ppxstabent_create())) {
+		return -1;
+	}
+	pptstabent->ind = ppt->ind;
+	pptstabent->data = ppt->data;
+	ppt->data = 0;
+	pptstabent->len = ppt->len;
+	if (jpc_ppxstab_insert(tile->pptstab, pptstabent)) {
+		return -1;
+	}
+	return 0;
+}
+
+static int jpc_dec_process_com(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	return 0;
+}
+
+static int jpc_dec_process_unk(jpc_dec_t *dec, jpc_ms_t *ms)
+{
+	fprintf(stderr, "warning: ignoring unknown marker segment\n");
+	jpc_ms_dump(ms, stderr);
+	return 0;
+}
+
+/******************************************************************************\
+*
+\******************************************************************************/
+
+static jpc_dec_cp_t *jpc_dec_cp_create(uint_fast16_t numcomps)
+{
+	jpc_dec_cp_t *cp;
+	jpc_dec_ccp_t *ccp;
+	int compno;
+
+	if (!(cp = jas_malloc(sizeof(jpc_dec_cp_t)))) {
+		return 0;
+	}
+	cp->flags = 0;
+	cp->numcomps = numcomps;
+	cp->prgord = 0;
+	cp->numlyrs = 0;
+	cp->mctid = 0;
+	cp->csty = 0;
+	if (!(cp->ccps = jas_malloc(cp->numcomps * sizeof(jpc_dec_ccp_t)))) {
+		return 0;
+	}
+	if (!(cp->pchglist = jpc_pchglist_create())) {
+		jas_free(cp->ccps);
+		return 0;
+	}
+	for (compno = 0, ccp = cp->ccps; compno < cp->numcomps;
+	  ++compno, ++ccp) {
+		ccp->flags = 0;
+		ccp->numrlvls = 0;
+		ccp->cblkwidthexpn = 0;
+		ccp->cblkheightexpn = 0;
+		ccp->qmfbid = 0;
+		ccp->numstepsizes = 0;
+		ccp->numguardbits = 0;
+		ccp->roishift = 0;
+		ccp->cblkctx = 0;
+	}
+	return cp;
+}
+
+static jpc_dec_cp_t *jpc_dec_cp_copy(jpc_dec_cp_t *cp)
+{
+	jpc_dec_cp_t *newcp;
+	jpc_dec_ccp_t *newccp;
+	jpc_dec_ccp_t *ccp;
+	int compno;
+
+	if (!(newcp = jpc_dec_cp_create(cp->numcomps))) {
+		return 0;
+	}
+	newcp->flags = cp->flags;
+	newcp->prgord = cp->prgord;
+	newcp->numlyrs = cp->numlyrs;
+	newcp->mctid = cp->mctid;
+	newcp->csty = cp->csty;
+	jpc_pchglist_destroy(newcp->pchglist);
+	newcp->pchglist = 0;
+	if (!(newcp->pchglist = jpc_pchglist_copy(cp->pchglist))) {
+		jas_free(newcp);
+		return 0;
+	}
+	for (compno = 0, newccp = newcp->ccps, ccp = cp->ccps;
+	  compno < cp->numcomps;
+	  ++compno, ++newccp, ++ccp) {
+		*newccp = *ccp;
+	}
+	return newcp;
+}
+
+static void jpc_dec_cp_resetflags(jpc_dec_cp_t *cp)
+{
+	int compno;
+	jpc_dec_ccp_t *ccp;
+	cp->flags &= (JPC_CSET | JPC_QSET);
+	for (compno = 0, ccp = cp->ccps; compno < cp->numcomps;
+	  ++compno, ++ccp) {
+		ccp->flags = 0;
+	}
+}
+
+static void jpc_dec_cp_destroy(jpc_dec_cp_t *cp)
+{
+	if (cp->ccps) {
+		jas_free(cp->ccps);
+	}
+	if (cp->pchglist) {
+		jpc_pchglist_destroy(cp->pchglist);
+	}
+	jas_free(cp);
+}
+
+static int jpc_dec_cp_isvalid(jpc_dec_cp_t *cp)
+{
+	uint_fast16_t compcnt;
+	jpc_dec_ccp_t *ccp;
+
+	if (!(cp->flags & JPC_CSET) || !(cp->flags & JPC_QSET)) {
+		return 0;
+	}
+	for (compcnt = cp->numcomps, ccp = cp->ccps; compcnt > 0; --compcnt,
+	  ++ccp) {
+		/* Is there enough step sizes for the number of bands? */
+		if ((ccp->qsty != JPC_QCX_SIQNT && ccp->numstepsizes < 3 *
+		  ccp->numrlvls - 2) || (ccp->qsty == JPC_QCX_SIQNT &&
+		  ccp->numstepsizes != 1)) {
+			return 0;
+		}
+	}
+	return 1;
+}
+
+static void calcstepsizes(uint_fast16_t refstepsize, int numrlvls,
+  uint_fast16_t *stepsizes)
+{
+	int bandno;
+	int numbands;
+	uint_fast16_t expn;
+	uint_fast16_t mant;
+	expn = JPC_QCX_GETEXPN(refstepsize);
+	mant = JPC_QCX_GETMANT(refstepsize);
+	numbands = 3 * numrlvls - 2;
+	for (bandno = 0; bandno < numbands; ++bandno) {
+		stepsizes[bandno] = JPC_QCX_MANT(mant) | JPC_QCX_EXPN(expn +
+		  (numrlvls - 1) - (numrlvls - 1 - ((bandno > 0) ? ((bandno + 2) / 3) : (0))));
+	}
+}
+
+static int jpc_dec_cp_prepare(jpc_dec_cp_t *cp)
+{
+	jpc_dec_ccp_t *ccp;
+	int compno;
+	int i;
+	for (compno = 0, ccp = cp->ccps; compno < cp->numcomps;
+	  ++compno, ++ccp) {
+		if (!(ccp->csty & JPC_COX_PRT)) {
+			for (i = 0; i < JPC_MAXRLVLS; ++i) {
+				ccp->prcwidthexpns[i] = 15;
+				ccp->prcheightexpns[i] = 15;
+			}
+		}
+		if (ccp->qsty == JPC_QCX_SIQNT) {
+			calcstepsizes(ccp->stepsizes[0], ccp->numrlvls, ccp->stepsizes);
+		}
+	}
+	return 0;
+}
+
+static int jpc_dec_cp_setfromcod(jpc_dec_cp_t *cp, jpc_cod_t *cod)
+{
+	jpc_dec_ccp_t *ccp;
+	int compno;
+	cp->flags |= JPC_CSET;
+	cp->prgord = cod->prg;
+	if (cod->mctrans) {
+		cp->mctid = (cod->compparms.qmfbid == JPC_COX_INS) ? (JPC_MCT_ICT) : (JPC_MCT_RCT);
+	} else {
+		cp->mctid = JPC_MCT_NONE;
+	}
+	cp->numlyrs = cod->numlyrs;
+	cp->csty = cod->csty & (JPC_COD_SOP | JPC_COD_EPH);
+	for (compno = 0, ccp = cp->ccps; compno < cp->numcomps;
+	  ++compno, ++ccp) {
+		jpc_dec_cp_setfromcox(cp, ccp, &cod->compparms, 0);
+	}
+	cp->flags |= JPC_CSET;
+	return 0;
+}
+
+static int jpc_dec_cp_setfromcoc(jpc_dec_cp_t *cp, jpc_coc_t *coc)
+{
+	jpc_dec_cp_setfromcox(cp, &cp->ccps[coc->compno], &coc->compparms, JPC_COC);
+	return 0;
+}
+
+static int jpc_dec_cp_setfromcox(jpc_dec_cp_t *cp, jpc_dec_ccp_t *ccp,
+  jpc_coxcp_t *compparms, int flags)
+{
+	int rlvlno;
+	if ((flags & JPC_COC) || !(ccp->flags & JPC_COC)) {
+		ccp->numrlvls = compparms->numdlvls + 1;
+		ccp->cblkwidthexpn = JPC_COX_GETCBLKSIZEEXPN(
+		  compparms->cblkwidthval);
+		ccp->cblkheightexpn = JPC_COX_GETCBLKSIZEEXPN(
+		  compparms->cblkheightval);
+		ccp->qmfbid = compparms->qmfbid;
+		ccp->cblkctx = compparms->cblksty;
+		ccp->csty = compparms->csty & JPC_COX_PRT;
+		for (rlvlno = 0; rlvlno < compparms->numrlvls; ++rlvlno) {
+			ccp->prcwidthexpns[rlvlno] =
+			  compparms->rlvls[rlvlno].parwidthval;
+			ccp->prcheightexpns[rlvlno] =
+			  compparms->rlvls[rlvlno].parheightval;
+		}
+		ccp->flags |= flags | JPC_CSET;
+	}
+	return 0;
+}
+
+static int jpc_dec_cp_setfromqcd(jpc_dec_cp_t *cp, jpc_qcd_t *qcd)
+{
+	int compno;
+	jpc_dec_ccp_t *ccp;
+	for (compno = 0, ccp = cp->ccps; compno < cp->numcomps;
+	  ++compno, ++ccp) {
+		jpc_dec_cp_setfromqcx(cp, ccp, &qcd->compparms, 0);
+	}
+	cp->flags |= JPC_QSET;
+	return 0;
+}
+
+static int jpc_dec_cp_setfromqcc(jpc_dec_cp_t *cp, jpc_qcc_t *qcc)
+{
+	return jpc_dec_cp_setfromqcx(cp, &cp->ccps[qcc->compno], &qcc->compparms, JPC_QCC);
+}
+
+static int jpc_dec_cp_setfromqcx(jpc_dec_cp_t *cp, jpc_dec_ccp_t *ccp,
+  jpc_qcxcp_t *compparms, int flags)
+{
+	int bandno;
+	if ((flags & JPC_QCC) || !(ccp->flags & JPC_QCC)) {
+		ccp->flags |= flags | JPC_QSET;
+		for (bandno = 0; bandno < compparms->numstepsizes; ++bandno) {
+			ccp->stepsizes[bandno] = compparms->stepsizes[bandno];
+		}
+		ccp->numstepsizes = compparms->numstepsizes;
+		ccp->numguardbits = compparms->numguard;
+		ccp->qsty = compparms->qntsty;
+	}
+	return 0;
+}
+
+static int jpc_dec_cp_setfromrgn(jpc_dec_cp_t *cp, jpc_rgn_t *rgn)
+{
+	jpc_dec_ccp_t *ccp;
+	ccp = &cp->ccps[rgn->compno];
+	ccp->roishift = rgn->roishift;
+	return 0;
+}
+
+static int jpc_pi_addpchgfrompoc(jpc_pi_t *pi, jpc_poc_t *poc)
+{
+	int pchgno;
+	jpc_pchg_t *pchg;
+	for (pchgno = 0; pchgno < poc->numpchgs; ++pchgno) {
+		if (!(pchg = jpc_pchg_copy(&poc->pchgs[pchgno]))) {
+			return -1;
+		}
+		if (jpc_pchglist_insert(pi->pchglist, -1, pchg)) {
+			return -1;
+		}
+	}
+	return 0;
+}
+
+static int jpc_dec_cp_setfrompoc(jpc_dec_cp_t *cp, jpc_poc_t *poc, int reset)
+{
+	int pchgno;
+	jpc_pchg_t *pchg;
+	if (reset) {
+		while (jpc_pchglist_numpchgs(cp->pchglist) > 0) {
+			pchg = jpc_pchglist_remove(cp->pchglist, 0);
+			jpc_pchg_destroy(pchg);
+		}
+	}
+	for (pchgno = 0; pchgno < poc->numpchgs; ++pchgno) {
+		if (!(pchg = jpc_pchg_copy(&poc->pchgs[pchgno]))) {
+			return -1;
+		}
+		if (jpc_pchglist_insert(cp->pchglist, -1, pchg)) {
+			return -1;
+		}
+	}
+	return 0;
+}
+
+static jpc_fix_t jpc_calcabsstepsize(int stepsize, int numbits)
+{
+	jpc_fix_t absstepsize;
+	int n;
+
+	absstepsize = jpc_inttofix(1);
+	n = JPC_FIX_FRACBITS - 11;
+	absstepsize |= (n >= 0) ? (JPC_QCX_GETMANT(stepsize) << n) :
+	  (JPC_QCX_GETMANT(stepsize) >> (-n));
+	n = numbits - JPC_QCX_GETEXPN(stepsize);
+	absstepsize = (n >= 0) ? (absstepsize << n) : (absstepsize >> (-n));
+	return absstepsize;
+}
+
+static void jpc_dequantize(jas_matrix_t *x, jpc_fix_t absstepsize)
+{
+	int i;
+	int j;
+	int t;
+
+	assert(absstepsize >= 0);
+	if (absstepsize == jpc_inttofix(1)) {
+		return;
+	}
+
+	for (i = 0; i < jas_matrix_numrows(x); ++i) {
+		for (j = 0; j < jas_matrix_numcols(x); ++j) {
+			t = jas_matrix_get(x, i, j);
+			if (t) {
+				t = jpc_fix_mul(t, absstepsize);
+			} else {
+				t = 0;
+			}
+			jas_matrix_set(x, i, j, t);
+		}
+	}
+
+}
+
+static void jpc_undo_roi(jas_matrix_t *x, int roishift, int bgshift, int numbps)
+{
+	int i;
+	int j;
+	int thresh;
+	jpc_fix_t val;
+	jpc_fix_t mag;
+	bool warn;
+	uint_fast32_t mask;
+
+	if (roishift == 0 && bgshift == 0) {
+		return;
+	}
+	thresh = 1 << roishift;
+
+	warn = false;
+	for (i = 0; i < jas_matrix_numrows(x); ++i) {
+		for (j = 0; j < jas_matrix_numcols(x); ++j) {
+			val = jas_matrix_get(x, i, j);
+			mag = JAS_ABS(val);
+			if (mag >= thresh) {
+				/* We are dealing with ROI data. */
+				mag >>= roishift;
+				val = (val < 0) ? (-mag) : mag;
+				jas_matrix_set(x, i, j, val);
+			} else {
+				/* We are dealing with non-ROI (i.e., background) data. */
+				mag <<= bgshift;
+				mask = (1 << numbps) - 1;
+				/* Perform a basic sanity check on the sample value. */
+				/* Some implementations write garbage in the unused
+				  most-significant bit planes introduced by ROI shifting.
+				  Here we ensure that any such bits are masked off. */
+				if (mag & (~mask)) {
+					if (!warn) {
+						fprintf(stderr,
+						  "warning: possibly corrupt code stream\n");
+						warn = true;
+					}
+					mag &= mask;
+				}
+				val = (val < 0) ? (-mag) : mag;
+				jas_matrix_set(x, i, j, val);
+			}
+		}
+	}
+}
+
+static jpc_dec_t *jpc_dec_create(jpc_dec_importopts_t *impopts, jas_stream_t *in)
+{
+	jpc_dec_t *dec;
+
+	if (!(dec = jas_malloc(sizeof(jpc_dec_t)))) {
+		return 0;
+	}
+
+	dec->image = 0;
+	dec->xstart = 0;
+	dec->ystart = 0;
+	dec->xend = 0;
+	dec->yend = 0;
+	dec->tilewidth = 0;
+	dec->tileheight = 0;
+	dec->tilexoff = 0;
+	dec->tileyoff = 0;
+	dec->numhtiles = 0;
+	dec->numvtiles = 0;
+	dec->numtiles = 0;
+	dec->tiles = 0;
+	dec->curtile = 0;
+	dec->numcomps = 0;
+	dec->in = in;
+	dec->cp = 0;
+	dec->maxlyrs = impopts->maxlyrs;
+	dec->maxpkts = impopts->maxpkts;
+dec->numpkts = 0;
+	dec->ppmseqno = 0;
+	dec->state = 0;
+	dec->cmpts = 0;
+	dec->pkthdrstreams = 0;
+	dec->ppmstab = 0;
+	dec->curtileendoff = 0;
+
+	return dec;
+}
+
+static void jpc_dec_destroy(jpc_dec_t *dec)
+{
+	if (dec->cstate) {
+		jpc_cstate_destroy(dec->cstate);
+	}
+	if (dec->pkthdrstreams) {
+		jpc_streamlist_destroy(dec->pkthdrstreams);
+	}
+	if (dec->image) {
+		jas_image_destroy(dec->image);
+	}
+
+	if (dec->cp) {
+		jpc_dec_cp_destroy(dec->cp);
+	}
+
+	if (dec->cmpts) {
+		jas_free(dec->cmpts);
+	}
+
+	if (dec->tiles) {
+		jas_free(dec->tiles);
+	}
+
+	jas_free(dec);
+}
+
+/******************************************************************************\
+*
+\******************************************************************************/
+
+void jpc_seglist_insert(jpc_dec_seglist_t *list, jpc_dec_seg_t *ins, jpc_dec_seg_t *node)
+{
+	jpc_dec_seg_t *prev;
+	jpc_dec_seg_t *next;
+
+	prev = ins;
+	node->prev = prev;
+	next = prev ? (prev->next) : 0;
+	node->prev = prev;
+	node->next = next;
+	if (prev) {
+		prev->next = node;
+	} else {
+		list->head = node;
+	}
+	if (next) {
+		next->prev = node;
+	} else {
+		list->tail = node;
+	}
+}
+
+void jpc_seglist_remove(jpc_dec_seglist_t *list, jpc_dec_seg_t *seg)
+{
+	jpc_dec_seg_t *prev;
+	jpc_dec_seg_t *next;
+
+	prev = seg->prev;
+	next = seg->next;
+	if (prev) {
+		prev->next = next;
+	} else {
+		list->head = next;
+	}
+	if (next) {
+		next->prev = prev;
+	} else {
+		list->tail = prev;
+	}
+	seg->prev = 0;
+	seg->next = 0;
+}
+
+jpc_dec_seg_t *jpc_seg_alloc(void)
+{
+	jpc_dec_seg_t *seg;
+
+	if (!(seg = jas_malloc(sizeof(jpc_dec_seg_t)))) {
+		return 0;
+	}
+	seg->prev = 0;
+	seg->next = 0;
+	seg->passno = -1;
+	seg->numpasses = 0;
+	seg->maxpasses = 0;
+	seg->type = JPC_SEG_INVALID;
+	seg->stream = 0;
+	seg->cnt = 0;
+	seg->complete = 0;
+	seg->lyrno = -1;
+	return seg;
+}
+
+void jpc_seg_destroy(jpc_dec_seg_t *seg)
+{
+	if (seg->stream) {
+		jas_stream_close(seg->stream);
+	}
+	jas_free(seg);
+}
+
+static int jpc_dec_dump(jpc_dec_t *dec, FILE *out)
+{
+	jpc_dec_tile_t *tile;
+	int tileno;
+	jpc_dec_tcomp_t *tcomp;
+	uint_fast16_t compno;
+	jpc_dec_rlvl_t *rlvl;
+	int rlvlno;
+	jpc_dec_band_t *band;
+	int bandno;
+	jpc_dec_prc_t *prc;
+	int prcno;
+	jpc_dec_cblk_t *cblk;
+	int cblkno;
+
+	for (tileno = 0, tile = dec->tiles; tileno < dec->numtiles;
+	  ++tileno, ++tile) {
+		for (compno = 0, tcomp = tile->tcomps; compno < dec->numcomps;
+		  ++compno, ++tcomp) {
+			for (rlvlno = 0, rlvl = tcomp->rlvls; rlvlno <
+			  tcomp->numrlvls; ++rlvlno, ++rlvl) {
+fprintf(out, "RESOLUTION LEVEL %d\n", rlvlno);
+fprintf(out, "xs =%d, ys = %d, xe = %d, ye = %d, w = %d, h = %d\n",
+  rlvl->xstart, rlvl->ystart, rlvl->xend, rlvl->yend, rlvl->xend -
+  rlvl->xstart, rlvl->yend - rlvl->ystart);
+				for (bandno = 0, band = rlvl->bands;
+				  bandno < rlvl->numbands; ++bandno, ++band) {
+fprintf(out, "BAND %d\n", bandno);
+fprintf(out, "xs =%d, ys = %d, xe = %d, ye = %d, w = %d, h = %d\n",
+  jas_seq2d_xstart(band->data), jas_seq2d_ystart(band->data), jas_seq2d_xend(band->data),
+  jas_seq2d_yend(band->data), jas_seq2d_xend(band->data) - jas_seq2d_xstart(band->data),
+  jas_seq2d_yend(band->data) - jas_seq2d_ystart(band->data));
+					for (prcno = 0, prc = band->prcs;
+					  prcno < rlvl->numprcs; ++prcno,
+					  ++prc) {
+fprintf(out, "CODE BLOCK GROUP %d\n", prcno);
+fprintf(out, "xs =%d, ys = %d, xe = %d, ye = %d, w = %d, h = %d\n",
+  prc->xstart, prc->ystart, prc->xend, prc->yend, prc->xend -
+  prc->xstart, prc->yend - prc->ystart);
+						for (cblkno = 0, cblk =
+						  prc->cblks; cblkno <
+						  prc->numcblks; ++cblkno,
+						  ++cblk) {
+fprintf(out, "CODE BLOCK %d\n", cblkno);
+fprintf(out, "xs =%d, ys = %d, xe = %d, ye = %d, w = %d, h = %d\n",
+  jas_seq2d_xstart(cblk->data), jas_seq2d_ystart(cblk->data), jas_seq2d_xend(cblk->data),
+  jas_seq2d_yend(cblk->data), jas_seq2d_xend(cblk->data) - jas_seq2d_xstart(cblk->data),
+  jas_seq2d_yend(cblk->data) - jas_seq2d_ystart(cblk->data));
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return 0;
+}
+
+jpc_streamlist_t *jpc_streamlist_create()
+{
+	jpc_streamlist_t *streamlist;
+	int i;
+
+	if (!(streamlist = jas_malloc(sizeof(jpc_streamlist_t)))) {
+		return 0;
+	}
+	streamlist->numstreams = 0;
+	streamlist->maxstreams = 100;
+	if (!(streamlist->streams = jas_malloc(streamlist->maxstreams *
+	  sizeof(jas_stream_t *)))) {
+		jas_free(streamlist);
+		return 0;
+	}
+	for (i = 0; i < streamlist->maxstreams; ++i) {
+		streamlist->streams[i] = 0;
+	}
+	return streamlist;
+}
+
+int jpc_streamlist_insert(jpc_streamlist_t *streamlist, int streamno,
+  jas_stream_t *stream)
+{
+	jas_stream_t **newstreams;
+	int newmaxstreams;
+	int i;
+	/* Grow the array of streams if necessary. */
+	if (streamlist->numstreams >= streamlist->maxstreams) {
+		newmaxstreams = streamlist->maxstreams + 1024;
+		if (!(newstreams = jas_realloc(streamlist->streams,
+		  (newmaxstreams + 1024) * sizeof(jas_stream_t *)))) {
+			return -1;
+		}
+		for (i = streamlist->numstreams; i < streamlist->maxstreams; ++i) {
+			streamlist->streams[i] = 0;
+		}
+		streamlist->maxstreams = newmaxstreams;
+		streamlist->streams = newstreams;
+	}
+	if (streamno != streamlist->numstreams) {
+		/* Can only handle insertion at start of list. */
+		return -1;
+	}
+	streamlist->streams[streamno] = stream;
+	++streamlist->numstreams;
+	return 0;
+}
+
+jas_stream_t *jpc_streamlist_remove(jpc_streamlist_t *streamlist, int streamno)
+{
+	jas_stream_t *stream;
+	int i;
+	if (streamno >= streamlist->numstreams) {
+		abort();
+	}
+	stream = streamlist->streams[streamno];
+	for (i = streamno + 1; i < streamlist->numstreams; ++i) {
+		streamlist->streams[i - 1] = streamlist->streams[i];
+	}
+	--streamlist->numstreams;
+	return stream;
+}
+
+void jpc_streamlist_destroy(jpc_streamlist_t *streamlist)
+{
+	int streamno;
+	if (streamlist->streams) {
+		for (streamno = 0; streamno < streamlist->numstreams;
+		  ++streamno) {
+			jas_stream_close(streamlist->streams[streamno]);
+		}
+		jas_free(streamlist->streams);
+	}
+	jas_free(streamlist);
+}
+
+jas_stream_t *jpc_streamlist_get(jpc_streamlist_t *streamlist, int streamno)
+{
+	assert(streamno < streamlist->numstreams);
+	return streamlist->streams[streamno];
+}
+
+int jpc_streamlist_numstreams(jpc_streamlist_t *streamlist)
+{
+	return streamlist->numstreams;
+}
+
+jpc_ppxstab_t *jpc_ppxstab_create()
+{
+	jpc_ppxstab_t *tab;
+
+	if (!(tab = jas_malloc(sizeof(jpc_ppxstab_t)))) {
+		return 0;
+	}
+	tab->numents = 0;
+	tab->maxents = 0;
+	tab->ents = 0;
+	return tab;
+}
+
+void jpc_ppxstab_destroy(jpc_ppxstab_t *tab)
+{
+	int i;
+	for (i = 0; i < tab->numents; ++i) {
+		jpc_ppxstabent_destroy(tab->ents[i]);
+	}
+	if (tab->ents) {
+		jas_free(tab->ents);
+	}
+	jas_free(tab);
+}
+
+int jpc_ppxstab_grow(jpc_ppxstab_t *tab, int maxents)
+{
+	jpc_ppxstabent_t **newents;
+	if (tab->maxents < maxents) {
+		newents = (tab->ents) ? jas_realloc(tab->ents, maxents *
+		  sizeof(jpc_ppxstabent_t *)) : jas_malloc(maxents * sizeof(jpc_ppxstabent_t *));
+		if (!newents) {
+			return -1;
+		}
+		tab->ents = newents;
+		tab->maxents = maxents;
+	}
+	return 0;
+}
+
+int jpc_ppxstab_insert(jpc_ppxstab_t *tab, jpc_ppxstabent_t *ent)
+{
+	int inspt;
+	int i;
+
+	for (i = 0; i < tab->numents; ++i) {
+		if (tab->ents[i]->ind > ent->ind) {
+			break;
+		}
+	}
+	inspt = i;
+
+	if (tab->numents >= tab->maxents) {
+		if (jpc_ppxstab_grow(tab, tab->maxents + 128)) {
+			return -1;
+		}
+	}
+
+	for (i = tab->numents; i > inspt; --i) {
+		tab->ents[i] = tab->ents[i - 1];
+	}
+	tab->ents[i] = ent;
+	++tab->numents;
+
+	return 0;
+}
+
+jpc_streamlist_t *jpc_ppmstabtostreams(jpc_ppxstab_t *tab)
+{
+	jpc_streamlist_t *streams;
+	unsigned char *dataptr;
+	uint_fast32_t datacnt;
+	uint_fast32_t tpcnt;
+	jpc_ppxstabent_t *ent;
+	int entno;
+	jas_stream_t *stream;
+	int n;
+
+	if (!(streams = jpc_streamlist_create())) {
+		goto error;
+	}
+
+	if (!tab->numents) {
+		return streams;
+	}
+
+	entno = 0;
+	ent = tab->ents[entno];
+	dataptr = ent->data;
+	datacnt = ent->len;
+	for (;;) {
+
+		/* Get the length of the packet header data for the current
+		  tile-part. */
+		if (datacnt < 4) {
+			goto error;
+		}
+		if (!(stream = jas_stream_memopen(0, 0))) {
+			goto error;
+		}
+		if (jpc_streamlist_insert(streams, jpc_streamlist_numstreams(streams),
+		  stream)) {
+			goto error;
+		}
+		tpcnt = (dataptr[0] << 24) | (dataptr[1] << 16) | (dataptr[2] << 8)
+		  | dataptr[3];
+		datacnt -= 4;
+		dataptr += 4;
+
+		/* Get the packet header data for the current tile-part. */
+		while (tpcnt) {
+			if (!datacnt) {
+				if (++entno >= tab->numents) {
+					goto error;
+				}
+				ent = tab->ents[entno];
+				dataptr = ent->data;
+				datacnt = ent->len;
+			}
+			n = JAS_MIN(tpcnt, datacnt);
+			if (jas_stream_write(stream, dataptr, n) != n) {
+				goto error;
+			}
+			tpcnt -= n;
+			dataptr += n;
+			datacnt -= n;
+		}
+		jas_stream_rewind(stream);
+		if (!datacnt) {
+			if (++entno >= tab->numents) {
+				break;
+			}
+			ent = tab->ents[entno];
+			dataptr = ent->data;
+			datacnt = ent->len;
+		}
+	}
+
+	return streams;
+
+error:
+	jpc_streamlist_destroy(streams);
+	return 0;
+}
+
+int jpc_pptstabwrite(jas_stream_t *out, jpc_ppxstab_t *tab)
+{
+	int i;
+	jpc_ppxstabent_t *ent;
+	for (i = 0; i < tab->numents; ++i) {
+		ent = tab->ents[i];
+		if (jas_stream_write(out, ent->data, ent->len) != ent->len) {
+			return -1;
+		}
+	}
+	return 0;
+}
+
+jpc_ppxstabent_t *jpc_ppxstabent_create()
+{
+	jpc_ppxstabent_t *ent;
+	if (!(ent = jas_malloc(sizeof(jpc_ppxstabent_t)))) {
+		return 0;
+	}
+	ent->data = 0;
+	ent->len = 0;
+	ent->ind = 0;
+	return ent;
+}
+
+void jpc_ppxstabent_destroy(jpc_ppxstabent_t *ent)
+{
+	if (ent->data) {
+		jas_free(ent->data);
+	}
+	jas_free(ent);
+}