--- /dev/null
+/*
+ * 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 1.2 2008-05-26 09:40:52 vp153 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) {
+ 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;
+}
projects / opencv / blobdiff