First commit - moving from LuaForge to SourceForge

1 files changed, 927 insertions, 0 deletions

diff --git a/src/libjasper/jpc/jpc_t1dec.c b/src/libjasper/jpc/jpc_t1dec.c
new file mode 100644
index 0000000..50df081
--- /dev/null
+++ b/src/libjasper/jpc/jpc_t1dec.c
@@ -0,0 +1,927 @@
+/*
+ * Copyright (c) 1999-2000 Image Power, Inc. and the University of
+ *   British Columbia.
+ * Copyright (c) 2001-2003 Michael David Adams.
+ * All rights reserved.
+ */
+
+/* __START_OF_JASPER_LICENSE__
+ * 
+ * JasPer License Version 2.0
+ * 
+ * Copyright (c) 2001-2006 Michael David Adams
+ * Copyright (c) 1999-2000 Image Power, Inc.
+ * Copyright (c) 1999-2000 The University of British Columbia
+ * 
+ * All rights reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person (the
+ * "User") obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, and/or sell copies of the Software, and to permit
+ * persons to whom the Software is furnished to do so, subject to the
+ * following conditions:
+ * 
+ * 1.  The above copyright notices and this permission notice (which
+ * includes the disclaimer below) shall be included in all copies or
+ * substantial portions of the Software.
+ * 
+ * 2.  The name of a copyright holder shall not be used to endorse or
+ * promote products derived from the Software without specific prior
+ * written permission.
+ * 
+ * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
+ * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
+ * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
+ * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
+ * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
+ * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+ * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
+ * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
+ * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
+ * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
+ * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
+ * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
+ * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
+ * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
+ * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
+ * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
+ * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
+ * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
+ * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
+ * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
+ * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
+ * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
+ * 
+ * __END_OF_JASPER_LICENSE__
+ */
+
+/*
+ * Tier 1 Decoder
+ *
+ * $Id: jpc_t1dec.c,v 1.1 2008/10/17 06:15:00 scuri Exp $
+ */
+
+/******************************************************************************\
+* Includes.
+\******************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include "jasper/jas_fix.h"
+#include "jasper/jas_stream.h"
+#include "jasper/jas_math.h"
+
+#include "jpc_bs.h"
+#include "jpc_mqdec.h"
+#include "jpc_t1dec.h"
+#include "jpc_t1cod.h"
+#include "jpc_dec.h"
+
+/******************************************************************************\
+*
+\******************************************************************************/
+
+static int jpc_dec_decodecblk(jpc_dec_t *dec, jpc_dec_tile_t *tile, jpc_dec_tcomp_t *tcomp, jpc_dec_band_t *band,
+  jpc_dec_cblk_t *cblk, int dopartial, int maxlyrs);
+static int dec_sigpass(jpc_dec_t *dec, jpc_mqdec_t *mqdec, int bitpos, int orient,
+  int vcausalflag, jas_matrix_t *flags, jas_matrix_t *data);
+static int dec_rawsigpass(jpc_dec_t *dec, jpc_bitstream_t *in, int bitpos,
+  int vcausalflag, jas_matrix_t *flags, jas_matrix_t *data);
+static int dec_refpass(jpc_dec_t *dec, jpc_mqdec_t *mqdec, int bitpos, int vcausalflag,
+  jas_matrix_t *flags, jas_matrix_t *data);
+static int dec_rawrefpass(jpc_dec_t *dec, jpc_bitstream_t *in, int bitpos,
+  int vcausalflag, jas_matrix_t *flags, jas_matrix_t *data);
+static int dec_clnpass(jpc_dec_t *dec, jpc_mqdec_t *mqdec, int bitpos, int orient,
+  int vcausalflag, int segsymflag, jas_matrix_t *flags, jas_matrix_t *data);
+
+#if defined(DEBUG)
+static long t1dec_cnt = 0;
+#endif
+
+#if !defined(DEBUG)
+#define	JPC_T1D_GETBIT(mqdec, v, passtypename, symtypename) \
+	((v) = jpc_mqdec_getbit(mqdec))
+#else
+#define	JPC_T1D_GETBIT(mqdec, v, passtypename, symtypename) \
+{ \
+	(v) = jpc_mqdec_getbit(mqdec); \
+	if (jas_getdbglevel() >= 100) { \
+		jas_eprintf("index = %ld; passtype = %s; symtype = %s; sym = %d\n", t1dec_cnt, passtypename, symtypename, v); \
+		++t1dec_cnt; \
+	} \
+}
+#endif
+#define	JPC_T1D_GETBITNOSKEW(mqdec, v, passtypename, symtypename) \
+	JPC_T1D_GETBIT(mqdec, v, passtypename, symtypename)
+
+#if !defined(DEBUG)
+#define	JPC_T1D_RAWGETBIT(bitstream, v, passtypename, symtypename) \
+	((v) = jpc_bitstream_getbit(bitstream))
+#else
+#define	JPC_T1D_RAWGETBIT(bitstream, v, passtypename, symtypename) \
+{ \
+	(v) = jpc_bitstream_getbit(bitstream); \
+	if (jas_getdbglevel() >= 100) { \
+		jas_eprintf("index = %ld; passtype = %s; symtype = %s; sym = %d\n", t1dec_cnt, passtypename, symtypename, v); \
+		++t1dec_cnt; \
+	} \
+}
+#endif
+
+/******************************************************************************\
+* Code.
+\******************************************************************************/
+
+int jpc_dec_decodecblks(jpc_dec_t *dec, jpc_dec_tile_t *tile)
+{
+	jpc_dec_tcomp_t *tcomp;
+	int compcnt;
+	jpc_dec_rlvl_t *rlvl;
+	int rlvlcnt;
+	jpc_dec_band_t *band;
+	int bandcnt;
+	jpc_dec_prc_t *prc;
+	int prccnt;
+	jpc_dec_cblk_t *cblk;
+	int cblkcnt;
+
+	for (compcnt = dec->numcomps, tcomp = tile->tcomps; compcnt > 0;
+	  --compcnt, ++tcomp) {
+		for (rlvlcnt = tcomp->numrlvls, rlvl = tcomp->rlvls;
+		  rlvlcnt > 0; --rlvlcnt, ++rlvl) {
+
+      // GeoJasper: dima - progress
+      jas_do_progress( (tcomp->numrlvls-rlvlcnt), (tcomp->numrlvls-1), "jpc: decode" );
+      if (jas_test_abort() == 1) return -1;
+
+			if (!rlvl->bands) {
+				continue;
+			}
+			for (bandcnt = rlvl->numbands, band = rlvl->bands;
+			  bandcnt > 0; --bandcnt, ++band) {
+				if (!band->data) {
+					continue;
+				}
+				for (prccnt = rlvl->numprcs, prc = band->prcs;
+				  prccnt > 0; --prccnt, ++prc) {
+					if (!prc->cblks) {
+						continue;
+					}
+					for (cblkcnt = prc->numcblks,
+					  cblk = prc->cblks; cblkcnt > 0;
+					  --cblkcnt, ++cblk) {
+						if (jpc_dec_decodecblk(dec, tile, tcomp,
+						  band, cblk, 1, JPC_MAXLYRS)) {
+							return -1;
+						}
+					}
+				}
+
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int jpc_dec_decodecblk(jpc_dec_t *dec, jpc_dec_tile_t *tile, jpc_dec_tcomp_t *tcomp, jpc_dec_band_t *band,
+  jpc_dec_cblk_t *cblk, int dopartial, int maxlyrs)
+{
+	jpc_dec_seg_t *seg;
+	int i;
+	int bpno;
+	int passtype;
+	int ret;
+	int compno;
+	int filldata;
+	int fillmask;
+	jpc_dec_ccp_t *ccp;
+
+	compno = tcomp - tile->tcomps;
+
+	if (!cblk->flags) {
+		/* Note: matrix is assumed to be zeroed */
+		if (!(cblk->flags = jas_matrix_create(jas_matrix_numrows(cblk->data) +
+		  2, jas_matrix_numcols(cblk->data) + 2))) {
+			return -1;
+		}
+	}
+
+	seg = cblk->segs.head;
+	while (seg && (seg != cblk->curseg || dopartial) && (maxlyrs < 0 ||
+	  seg->lyrno < maxlyrs)) {
+		assert(seg->numpasses >= seg->maxpasses || dopartial);
+		assert(seg->stream);
+		jas_stream_rewind(seg->stream);
+		jas_stream_setrwcount(seg->stream, 0);
+		if (seg->type == JPC_SEG_MQ) {
+			if (!cblk->mqdec) {
+				if (!(cblk->mqdec = jpc_mqdec_create(JPC_NUMCTXS, 0))) {
+					return -1;
+				}
+				jpc_mqdec_setctxs(cblk->mqdec, JPC_NUMCTXS, jpc_mqctxs);
+			}
+			jpc_mqdec_setinput(cblk->mqdec, seg->stream);
+			jpc_mqdec_init(cblk->mqdec);
+		} else {
+			assert(seg->type == JPC_SEG_RAW);
+			if (!cblk->nulldec) {
+				if (!(cblk->nulldec = jpc_bitstream_sopen(seg->stream, "r"))) {
+					assert(0);
+				}
+			}
+		}
+
+
+		for (i = 0; i < seg->numpasses; ++i) {
+			if (cblk->numimsbs > band->numbps) {
+				ccp = &tile->cp->ccps[compno];
+				if (ccp->roishift <= 0) {
+					jas_eprintf("warning: corrupt code stream\n");
+				} else {
+					if (cblk->numimsbs < ccp->roishift - band->numbps) {
+						jas_eprintf("warning: corrupt code stream\n");
+					}
+				}
+			}
+			bpno = band->roishift + band->numbps - 1 - (cblk->numimsbs +
+			  (seg->passno + i - cblk->firstpassno + 2) / 3);
+if (bpno < 0) {
+	goto premature_exit;
+}
+#if 1
+			passtype = (seg->passno + i + 2) % 3;
+#else
+			passtype = JPC_PASSTYPE(seg->passno + i + 2);
+#endif
+			assert(bpno >= 0 && bpno < 31);
+			switch (passtype) {
+			case JPC_SIGPASS:
+				ret = (seg->type == JPC_SEG_MQ) ? dec_sigpass(dec,
+				  cblk->mqdec, bpno, band->orient,
+				  (tile->cp->ccps[compno].cblkctx & JPC_COX_VSC) != 0,
+				  cblk->flags, cblk->data) :
+				  dec_rawsigpass(dec, cblk->nulldec, bpno,
+				  (tile->cp->ccps[compno].cblkctx & JPC_COX_VSC) != 0,
+				  cblk->flags, cblk->data);
+				break;
+			case JPC_REFPASS:
+				ret = (seg->type == JPC_SEG_MQ) ?
+				  dec_refpass(dec, cblk->mqdec, bpno,
+				  (tile->cp->ccps[compno].cblkctx & JPC_COX_VSC) != 0,
+				  cblk->flags, cblk->data) :
+				  dec_rawrefpass(dec, cblk->nulldec, bpno,
+				  (tile->cp->ccps[compno].cblkctx & JPC_COX_VSC) != 0,
+				  cblk->flags, cblk->data);
+				break;
+			case JPC_CLNPASS:
+				assert(seg->type == JPC_SEG_MQ);
+				ret = dec_clnpass(dec, cblk->mqdec, bpno,
+				  band->orient, (tile->cp->ccps[compno].cblkctx &
+				  JPC_COX_VSC) != 0, (tile->cp->ccps[compno].cblkctx &
+				  JPC_COX_SEGSYM) != 0, cblk->flags,
+				  cblk->data);
+				break;
+			default:
+				ret = -1;
+				break;
+			}
+			/* Do we need to reset after each coding pass? */
+			if (tile->cp->ccps[compno].cblkctx & JPC_COX_RESET) {
+				jpc_mqdec_setctxs(cblk->mqdec, JPC_NUMCTXS, jpc_mqctxs);
+			}
+
+			if (ret) {
+				jas_eprintf("coding pass failed passtype=%d segtype=%d\n", passtype, seg->type);
+				return -1;
+			}
+
+		}
+
+		if (seg->type == JPC_SEG_MQ) {
+/* Note: dont destroy mq decoder because context info will be lost */
+		} else {
+			assert(seg->type == JPC_SEG_RAW);
+			if (tile->cp->ccps[compno].cblkctx & JPC_COX_PTERM) {
+				fillmask = 0x7f;
+				filldata = 0x2a;
+			} else {
+				fillmask = 0;
+				filldata = 0;
+			}
+			if ((ret = jpc_bitstream_inalign(cblk->nulldec, fillmask,
+			  filldata)) < 0) {
+				return -1;
+			} else if (ret > 0) {
+				jas_eprintf("warning: bad termination pattern detected\n");
+			}
+			jpc_bitstream_close(cblk->nulldec);
+			cblk->nulldec = 0;
+		}
+
+		cblk->curseg = seg->next;
+		jpc_seglist_remove(&cblk->segs, seg);
+		jpc_seg_destroy(seg);
+		seg = cblk->curseg;
+	}
+
+	assert(dopartial ? (!cblk->curseg) : 1);
+
+premature_exit:
+	return 0;
+}
+
+/******************************************************************************\
+* Code for significance pass.
+\******************************************************************************/
+
+#define	jpc_sigpass_step(fp, frowstep, dp, bitpos, oneplushalf, orient, mqdec, vcausalflag) \
+{ \
+	int f; \
+	int v; \
+	f = *(fp); \
+	if ((f & JPC_OTHSIGMSK) && !(f & (JPC_SIG | JPC_VISIT))) { \
+		jpc_mqdec_setcurctx((mqdec), JPC_GETZCCTXNO(f, (orient))); \
+		JPC_T1D_GETBIT((mqdec), v, "SIG", "ZC"); \
+		if (v) { \
+			jpc_mqdec_setcurctx((mqdec), JPC_GETSCCTXNO(f)); \
+			JPC_T1D_GETBIT((mqdec), v, "SIG", "SC"); \
+			v ^= JPC_GETSPB(f); \
+			JPC_UPDATEFLAGS4((fp), (frowstep), v, (vcausalflag)); \
+			*(fp) |= JPC_SIG; \
+			*(dp) = (v) ? (-(oneplushalf)) : (oneplushalf); \
+		} \
+		*(fp) |= JPC_VISIT; \
+	} \
+}
+
+static int dec_sigpass(jpc_dec_t *dec, register jpc_mqdec_t *mqdec, int bitpos, int orient,
+  int vcausalflag, jas_matrix_t *flags, jas_matrix_t *data)
+{
+	int i;
+	int j;
+	int one;
+	int half;
+	int oneplushalf;
+	int vscanlen;
+	int width;
+	int height;
+	jpc_fix_t *fp;
+	int frowstep;
+	int fstripestep;
+	jpc_fix_t *fstripestart;
+	jpc_fix_t *fvscanstart;
+	jpc_fix_t *dp;
+	int drowstep;
+	int dstripestep;
+	jpc_fix_t *dstripestart;
+	jpc_fix_t *dvscanstart;
+	int k;
+
+	/* Avoid compiler warning about unused parameters. */
+	dec = 0;
+
+	width = jas_matrix_numcols(data);
+	height = jas_matrix_numrows(data);
+	frowstep = jas_matrix_rowstep(flags);
+	drowstep = jas_matrix_rowstep(data);
+	fstripestep = frowstep << 2;
+	dstripestep = drowstep << 2;
+
+	one = 1 << bitpos;
+	half = one >> 1;
+	oneplushalf = one | half;
+
+	fstripestart = jas_matrix_getref(flags, 1, 1);
+	dstripestart = jas_matrix_getref(data, 0, 0);
+	for (i = height; i > 0; i -= 4, fstripestart += fstripestep,
+	  dstripestart += dstripestep) {
+		fvscanstart = fstripestart;
+		dvscanstart = dstripestart;
+		vscanlen = JAS_MIN(i, 4);
+		for (j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
+			fp = fvscanstart;
+			dp = dvscanstart;
+			k = vscanlen;
+
+			/* Process first sample in vertical scan. */
+			jpc_sigpass_step(fp, frowstep, dp, bitpos, oneplushalf,
+			  orient, mqdec, vcausalflag);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process second sample in vertical scan. */
+			jpc_sigpass_step(fp, frowstep, dp, bitpos, oneplushalf,
+			  orient, mqdec, 0);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process third sample in vertical scan. */
+			jpc_sigpass_step(fp, frowstep, dp, bitpos, oneplushalf,
+			  orient, mqdec, 0);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process fourth sample in vertical scan. */
+			jpc_sigpass_step(fp, frowstep, dp, bitpos, oneplushalf,
+			  orient, mqdec, 0);
+		}
+	}
+	return 0;
+}
+
+#define	jpc_rawsigpass_step(fp, frowstep, dp, oneplushalf, in, vcausalflag) \
+{ \
+	jpc_fix_t f = *(fp); \
+	jpc_fix_t v; \
+	if ((f & JPC_OTHSIGMSK) && !(f & (JPC_SIG | JPC_VISIT))) { \
+		JPC_T1D_RAWGETBIT(in, v, "SIG", "ZC"); \
+		if (v < 0) { \
+			return -1; \
+		} \
+		if (v) { \
+			JPC_T1D_RAWGETBIT(in, v, "SIG", "SC"); \
+			if (v < 0) { \
+				return -1; \
+			} \
+			JPC_UPDATEFLAGS4((fp), (frowstep), v, (vcausalflag)); \
+			*(fp) |= JPC_SIG; \
+			*(dp) = v ? (-oneplushalf) : (oneplushalf); \
+		} \
+		*(fp) |= JPC_VISIT; \
+	} \
+}
+
+static int dec_rawsigpass(jpc_dec_t *dec, jpc_bitstream_t *in, int bitpos, int vcausalflag,
+  jas_matrix_t *flags, jas_matrix_t *data)
+{
+	int i;
+	int j;
+	int k;
+	int one;
+	int half;
+	int oneplushalf;
+	int vscanlen;
+	int width;
+	int height;
+	jpc_fix_t *fp;
+	int frowstep;
+	int fstripestep;
+	jpc_fix_t *fstripestart;
+	jpc_fix_t *fvscanstart;
+	jpc_fix_t *dp;
+	int drowstep;
+	int dstripestep;
+	jpc_fix_t *dstripestart;
+	jpc_fix_t *dvscanstart;
+
+	/* Avoid compiler warning about unused parameters. */
+	dec = 0;
+
+	width = jas_matrix_numcols(data);
+	height = jas_matrix_numrows(data);
+	frowstep = jas_matrix_rowstep(flags);
+	drowstep = jas_matrix_rowstep(data);
+	fstripestep = frowstep << 2;
+	dstripestep = drowstep << 2;
+
+	one = 1 << bitpos;
+	half = one >> 1;
+	oneplushalf = one | half;
+
+	fstripestart = jas_matrix_getref(flags, 1, 1);
+	dstripestart = jas_matrix_getref(data, 0, 0);
+	for (i = height; i > 0; i -= 4, fstripestart += fstripestep,
+	  dstripestart += dstripestep) {
+		fvscanstart = fstripestart;
+		dvscanstart = dstripestart;
+		vscanlen = JAS_MIN(i, 4);
+		for (j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
+			fp = fvscanstart;
+			dp = dvscanstart;
+			k = vscanlen;
+
+			/* Process first sample in vertical scan. */
+			jpc_rawsigpass_step(fp, frowstep, dp, oneplushalf,
+			  in, vcausalflag);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process second sample in vertical scan. */
+			jpc_rawsigpass_step(fp, frowstep, dp, oneplushalf,
+			  in, 0);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process third sample in vertical scan. */
+			jpc_rawsigpass_step(fp, frowstep, dp, oneplushalf,
+			  in, 0);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process fourth sample in vertical scan. */
+			jpc_rawsigpass_step(fp, frowstep, dp, oneplushalf,
+			  in, 0);
+
+		}
+	}
+	return 0;
+}
+
+/******************************************************************************\
+* Code for refinement pass.
+\******************************************************************************/
+
+#define	jpc_refpass_step(fp, dp, poshalf, neghalf, mqdec, vcausalflag) \
+{ \
+	int v; \
+	int t; \
+	if (((*(fp)) & (JPC_SIG | JPC_VISIT)) == JPC_SIG) { \
+		jpc_mqdec_setcurctx((mqdec), JPC_GETMAGCTXNO(*(fp))); \
+		JPC_T1D_GETBITNOSKEW((mqdec), v, "REF", "MR"); \
+		t = (v ? (poshalf) : (neghalf)); \
+		*(dp) += (*(dp) < 0) ? (-t) : t; \
+		*(fp) |= JPC_REFINE; \
+	} \
+}
+
+static int dec_refpass(jpc_dec_t *dec, register jpc_mqdec_t *mqdec, int bitpos,
+  int vcausalflag, jas_matrix_t *flags, jas_matrix_t *data)
+{
+	int i;
+	int j;
+	int vscanlen;
+	int width;
+	int height;
+	int one;
+	int poshalf;
+	int neghalf;
+	jpc_fix_t *fp;
+	int frowstep;
+	int fstripestep;
+	jpc_fix_t *fstripestart;
+	jpc_fix_t *fvscanstart;
+	jpc_fix_t *dp;
+	int drowstep;
+	int dstripestep;
+	jpc_fix_t *dstripestart;
+	jpc_fix_t *dvscanstart;
+	int k;
+
+	/* Avoid compiler warning about unused parameters. */
+	dec = 0;
+	vcausalflag = 0;
+
+	width = jas_matrix_numcols(data);
+	height = jas_matrix_numrows(data);
+	frowstep = jas_matrix_rowstep(flags);
+	drowstep = jas_matrix_rowstep(data);
+	fstripestep = frowstep << 2;
+	dstripestep = drowstep << 2;
+
+	one = 1 << bitpos;
+	poshalf = one >> 1;
+	neghalf = (bitpos > 0) ? (-poshalf) : (-1);
+
+	fstripestart = jas_matrix_getref(flags, 1, 1);
+	dstripestart = jas_matrix_getref(data, 0, 0);
+	for (i = height; i > 0; i -= 4, fstripestart += fstripestep,
+	  dstripestart += dstripestep) {
+		fvscanstart = fstripestart;
+		dvscanstart = dstripestart;
+		vscanlen = JAS_MIN(i, 4);
+		for (j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
+			fp = fvscanstart;
+			dp = dvscanstart;
+			k = vscanlen;
+
+			/* Process first sample in vertical scan. */
+			jpc_refpass_step(fp, dp, poshalf, neghalf, mqdec,
+			  vcausalflag);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process second sample in vertical scan. */
+			jpc_refpass_step(fp, dp, poshalf, neghalf, mqdec, 0);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process third sample in vertical scan. */
+			jpc_refpass_step(fp, dp, poshalf, neghalf, mqdec, 0);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process fourth sample in vertical scan. */
+			jpc_refpass_step(fp, dp, poshalf, neghalf, mqdec, 0);
+		}
+	}
+
+	return 0;
+}
+
+#define	jpc_rawrefpass_step(fp, dp, poshalf, neghalf, in, vcausalflag) \
+{ \
+	jpc_fix_t v; \
+	jpc_fix_t t; \
+	if (((*(fp)) & (JPC_SIG | JPC_VISIT)) == JPC_SIG) { \
+		JPC_T1D_RAWGETBIT(in, v, "REF", "MAGREF"); \
+		if (v < 0) { \
+			return -1; \
+		} \
+		t = (v ? poshalf : neghalf); \
+		*(dp) += (*(dp) < 0) ? (-t) : t; \
+		*(fp) |= JPC_REFINE; \
+	} \
+}
+
+static int dec_rawrefpass(jpc_dec_t *dec, jpc_bitstream_t *in, int bitpos, int vcausalflag,
+  jas_matrix_t *flags, jas_matrix_t *data)
+{
+	int i;
+	int j;
+	int k;
+	int vscanlen;
+	int width;
+	int height;
+	int one;
+	int poshalf;
+	int neghalf;
+	jpc_fix_t *fp;
+	int frowstep;
+	int fstripestep;
+	jpc_fix_t *fstripestart;
+	jpc_fix_t *fvscanstart;
+	jpc_fix_t *dp;
+	int drowstep;
+	int dstripestep;
+	jpc_fix_t *dstripestart;
+	jpc_fix_t *dvscanstart;
+
+	/* Avoid compiler warning about unused parameters. */
+	dec = 0;
+	vcausalflag = 0;
+
+	width = jas_matrix_numcols(data);
+	height = jas_matrix_numrows(data);
+	frowstep = jas_matrix_rowstep(flags);
+	drowstep = jas_matrix_rowstep(data);
+	fstripestep = frowstep << 2;
+	dstripestep = drowstep << 2;
+
+	one = 1 << bitpos;
+	poshalf = one >> 1;
+	neghalf = (bitpos > 0) ? (-poshalf) : (-1);
+
+	fstripestart = jas_matrix_getref(flags, 1, 1);
+	dstripestart = jas_matrix_getref(data, 0, 0);
+	for (i = height; i > 0; i -= 4, fstripestart += fstripestep,
+	  dstripestart += dstripestep) {
+		fvscanstart = fstripestart;
+		dvscanstart = dstripestart;
+		vscanlen = JAS_MIN(i, 4);
+		for (j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
+			fp = fvscanstart;
+			dp = dvscanstart;
+			k = vscanlen;
+
+			/* Process first sample in vertical scan. */
+			jpc_rawrefpass_step(fp, dp, poshalf, neghalf, in,
+			  vcausalflag);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process second sample in vertical scan. */
+			jpc_rawrefpass_step(fp, dp, poshalf, neghalf, in, 0);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process third sample in vertical scan. */
+			jpc_rawrefpass_step(fp, dp, poshalf, neghalf, in, 0);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process fourth sample in vertical scan. */
+			jpc_rawrefpass_step(fp, dp, poshalf, neghalf, in, 0);
+		}
+	}
+	return 0;
+}
+
+/******************************************************************************\
+* Code for cleanup pass.
+\******************************************************************************/
+
+#define	jpc_clnpass_step(f, fp, frowstep, dp, oneplushalf, orient, mqdec, flabel, plabel, vcausalflag) \
+{ \
+	int v; \
+flabel \
+	if (!((f) & (JPC_SIG | JPC_VISIT))) { \
+		jpc_mqdec_setcurctx((mqdec), JPC_GETZCCTXNO((f), (orient))); \
+		JPC_T1D_GETBIT((mqdec), v, "CLN", "ZC"); \
+		if (v) { \
+plabel \
+			/* Coefficient is significant. */ \
+			jpc_mqdec_setcurctx((mqdec), JPC_GETSCCTXNO(f)); \
+			JPC_T1D_GETBIT((mqdec), v, "CLN", "SC"); \
+			v ^= JPC_GETSPB(f); \
+			*(dp) = (v) ? (-(oneplushalf)) : (oneplushalf); \
+			JPC_UPDATEFLAGS4((fp), (frowstep), v, (vcausalflag)); \
+			*(fp) |= JPC_SIG; \
+		} \
+	} \
+	/* XXX - Is this correct?  Can aggregation cause some VISIT bits not to be reset?  Check. */ \
+	*(fp) &= ~JPC_VISIT; \
+}
+
+static int dec_clnpass(jpc_dec_t *dec, register jpc_mqdec_t *mqdec, int bitpos, int orient,
+  int vcausalflag, int segsymflag, jas_matrix_t *flags, jas_matrix_t *data)
+{
+	int i;
+	int j;
+	int k;
+	int vscanlen;
+	int v;
+	int half;
+	int runlen;
+	int f;
+	int width;
+	int height;
+	int one;
+	int oneplushalf;
+
+	jpc_fix_t *fp;
+	int frowstep;
+	int fstripestep;
+	jpc_fix_t *fstripestart;
+	jpc_fix_t *fvscanstart;
+
+	jpc_fix_t *dp;
+	int drowstep;
+	int dstripestep;
+	jpc_fix_t *dstripestart;
+	jpc_fix_t *dvscanstart;
+
+	/* Avoid compiler warning about unused parameters. */
+	dec = 0;
+
+	one = 1 << bitpos;
+	half = one >> 1;
+	oneplushalf = one | half;
+
+	width = jas_matrix_numcols(data);
+	height = jas_matrix_numrows(data);
+
+	frowstep = jas_matrix_rowstep(flags);
+	drowstep = jas_matrix_rowstep(data);
+	fstripestep = frowstep << 2;
+	dstripestep = drowstep << 2;
+
+	fstripestart = jas_matrix_getref(flags, 1, 1);
+	dstripestart = jas_matrix_getref(data, 0, 0);
+	for (i = 0; i < height; i += 4, fstripestart += fstripestep,
+	  dstripestart += dstripestep) {
+		fvscanstart = fstripestart;
+		dvscanstart = dstripestart;
+		vscanlen = JAS_MIN(4, height - i);
+		for (j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
+			fp = fvscanstart;
+			if (vscanlen >= 4 && (!((*fp) & (JPC_SIG | JPC_VISIT |
+			  JPC_OTHSIGMSK))) && (fp += frowstep, !((*fp) & (JPC_SIG |
+			  JPC_VISIT | JPC_OTHSIGMSK))) && (fp += frowstep, !((*fp) &
+			  (JPC_SIG | JPC_VISIT | JPC_OTHSIGMSK))) && (fp += frowstep,
+			  !((*fp) & (JPC_SIG | JPC_VISIT | JPC_OTHSIGMSK)))) {
+
+				jpc_mqdec_setcurctx(mqdec, JPC_AGGCTXNO);
+				JPC_T1D_GETBIT(mqdec, v, "CLN", "AGG");
+				if (!v) {
+					continue;
+				}
+				jpc_mqdec_setcurctx(mqdec, JPC_UCTXNO);
+				JPC_T1D_GETBITNOSKEW(mqdec, v, "CLN", "RL");
+				runlen = v;
+				JPC_T1D_GETBITNOSKEW(mqdec, v, "CLN", "RL");
+				runlen = (runlen << 1) | v;
+				f = *(fp = fvscanstart + frowstep * runlen);
+				dp = dvscanstart + drowstep * runlen;
+				k = vscanlen - runlen;
+				switch (runlen) {
+				case 0:
+					goto clnpass_partial0;
+					break;
+				case 1:
+					goto clnpass_partial1;
+					break;
+				case 2:
+					goto clnpass_partial2;
+					break;
+				case 3:
+					goto clnpass_partial3;
+					break;
+				}
+			} else {
+				f = *(fp = fvscanstart);
+				dp = dvscanstart;
+				k = vscanlen;
+				goto clnpass_full0;
+			}
+
+			/* Process first sample in vertical scan. */
+			jpc_clnpass_step(f, fp, frowstep, dp, oneplushalf, orient,
+			  mqdec, clnpass_full0:, clnpass_partial0:,
+			  vcausalflag);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process second sample in vertical scan. */
+			f = *fp;
+			jpc_clnpass_step(f, fp, frowstep, dp, oneplushalf, orient,
+				mqdec, ;, clnpass_partial1:, 0);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process third sample in vertical scan. */
+			f = *fp;
+			jpc_clnpass_step(f, fp, frowstep, dp, oneplushalf, orient,
+				mqdec, ;, clnpass_partial2:, 0);
+			if (--k <= 0) {
+				continue;
+			}
+			fp += frowstep;
+			dp += drowstep;
+
+			/* Process fourth sample in vertical scan. */
+			f = *fp;
+			jpc_clnpass_step(f, fp, frowstep, dp, oneplushalf, orient,
+				mqdec, ;, clnpass_partial3:, 0);
+		}
+	}
+
+	if (segsymflag) {
+		int segsymval;
+		segsymval = 0;
+		jpc_mqdec_setcurctx(mqdec, JPC_UCTXNO);
+		JPC_T1D_GETBITNOSKEW(mqdec, v, "CLN", "SEGSYM");
+		segsymval = (segsymval << 1) | (v & 1);
+		JPC_T1D_GETBITNOSKEW(mqdec, v, "CLN", "SEGSYM");
+		segsymval = (segsymval << 1) | (v & 1);
+		JPC_T1D_GETBITNOSKEW(mqdec, v, "CLN", "SEGSYM");
+		segsymval = (segsymval << 1) | (v & 1);
+		JPC_T1D_GETBITNOSKEW(mqdec, v, "CLN", "SEGSYM");
+		segsymval = (segsymval << 1) | (v & 1);
+		if (segsymval != 0xa) {
+			jas_eprintf("warning: bad segmentation symbol\n");
+		}
+	}
+
+	return 0;
+}