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Diffstat (limited to 'converter/other/jpeg2000/libjasper/jpc/jpc_t1dec.c')
| -rw-r--r-- | converter/other/jpeg2000/libjasper/jpc/jpc_t1dec.c | 954 |
1 files changed, 954 insertions, 0 deletions
diff --git a/converter/other/jpeg2000/libjasper/jpc/jpc_t1dec.c b/converter/other/jpeg2000/libjasper/jpc/jpc_t1dec.c new file mode 100644 index 00000000..01a54ea8 --- /dev/null +++ b/converter/other/jpeg2000/libjasper/jpc/jpc_t1dec.c @@ -0,0 +1,954 @@ +/* + * Copyright (c) 1999-2000 Image Power, Inc. and the University of + * British Columbia. + * Copyright (c) 2001-2002 Michael David Adams. + * All rights reserved. + */ + +/* __START_OF_JASPER_LICENSE__ + * + * JasPer Software License + * + * IMAGE POWER JPEG-2000 PUBLIC LICENSE + * ************************************ + * + * GRANT: + * + * Permission is hereby granted, free of charge, to any person (the "User") + * obtaining a copy of this software and associated documentation, to deal + * in the JasPer Software without restriction, including without limitation + * the right to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the JasPer Software (in source and binary forms), + * and to permit persons to whom the JasPer Software is furnished to do so, + * provided further that the License Conditions below are met. + * + * License Conditions + * ****************** + * + * A. Redistributions of source code must retain the above copyright notice, + * and this list of conditions, and the following disclaimer. + * + * B. Redistributions in binary form must reproduce the above copyright + * notice, and this list of conditions, and the following disclaimer in + * the documentation and/or other materials provided with the distribution. + * + * C. Neither the name of Image Power, Inc. nor any other contributor + * (including, but not limited to, the University of British Columbia and + * Michael David Adams) may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * D. User agrees that it shall not commence any action against Image Power, + * Inc., the University of British Columbia, Michael David Adams, or any + * other contributors (collectively "Licensors") for infringement of any + * intellectual property rights ("IPR") held by the User in respect of any + * technology that User owns or has a right to license or sublicense and + * which is an element required in order to claim compliance with ISO/IEC + * 15444-1 (i.e., JPEG-2000 Part 1). "IPR" means all intellectual property + * rights worldwide arising under statutory or common law, and whether + * or not perfected, including, without limitation, all (i) patents and + * patent applications owned or licensable by User; (ii) rights associated + * with works of authorship including copyrights, copyright applications, + * copyright registrations, mask work rights, mask work applications, + * mask work registrations; (iii) rights relating to the protection of + * trade secrets and confidential information; (iv) any right analogous + * to those set forth in subsections (i), (ii), or (iii) and any other + * proprietary rights relating to intangible property (other than trademark, + * trade dress, or service mark rights); and (v) divisions, continuations, + * renewals, reissues and extensions of the foregoing (as and to the extent + * applicable) now existing, hereafter filed, issued or acquired. + * + * E. If User commences an infringement action against any Licensor(s) then + * such Licensor(s) shall have the right to terminate User's license and + * all sublicenses that have been granted hereunder by User to other parties. + * + * F. This software is for use only in hardware or software products that + * are compliant with ISO/IEC 15444-1 (i.e., JPEG-2000 Part 1). No license + * or right to this Software is granted for products that do not comply + * with ISO/IEC 15444-1. The JPEG-2000 Part 1 standard can be purchased + * from the ISO. + * + * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. + * NO USE OF THE JASPER SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER + * THIS DISCLAIMER. THE JASPER SOFTWARE IS PROVIDED BY THE LICENSORS AND + * CONTRIBUTORS UNDER THIS LICENSE ON AN ``AS-IS'' BASIS, WITHOUT WARRANTY + * OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, + * WARRANTIES THAT THE JASPER SOFTWARE IS FREE OF DEFECTS, IS MERCHANTABLE, + * IS FIT FOR A PARTICULAR PURPOSE OR IS NON-INFRINGING. THOSE INTENDING + * TO USE THE JASPER SOFTWARE OR MODIFICATIONS THEREOF FOR USE IN HARDWARE + * OR SOFTWARE PRODUCTS ARE ADVISED THAT THEIR USE MAY INFRINGE EXISTING + * PATENTS, COPYRIGHTS, TRADEMARKS, OR OTHER INTELLECTUAL PROPERTY RIGHTS. + * THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE JASPER SOFTWARE + * IS WITH THE USER. SHOULD ANY PART OF THE JASPER SOFTWARE PROVE DEFECTIVE + * IN ANY RESPECT, THE USER (AND NOT THE INITIAL DEVELOPERS, THE UNIVERSITY + * OF BRITISH COLUMBIA, IMAGE POWER, INC., MICHAEL DAVID ADAMS, OR ANY + * OTHER CONTRIBUTOR) SHALL ASSUME THE COST OF ANY NECESSARY SERVICING, + * REPAIR OR CORRECTION. UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, + * WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL THE + * INITIAL DEVELOPER, THE UNIVERSITY OF BRITISH COLUMBIA, IMAGE POWER, INC., + * MICHAEL DAVID ADAMS, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF THE + * JASPER SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO + * THE USER OR ANY OTHER PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR + * CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION, + * DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR + * MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES, EVEN IF + * SUCH PARTY HAD BEEN INFORMED, OR OUGHT TO HAVE KNOWN, OF THE POSSIBILITY + * OF SUCH DAMAGES. THE JASPER SOFTWARE AND UNDERLYING TECHNOLOGY ARE NOT + * FAULT-TOLERANT AND ARE NOT DESIGNED, MANUFACTURED OR INTENDED FOR USE OR + * RESALE AS ON-LINE CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING + * FAIL-SAFE PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, + * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT + * LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE + * JASPER SOFTWARE OR UNDERLYING TECHNOLOGY OR PRODUCT COULD LEAD DIRECTLY + * TO DEATH, PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE + * ("HIGH RISK ACTIVITIES"). LICENSOR SPECIFICALLY DISCLAIMS ANY EXPRESS + * OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. USER WILL NOT + * KNOWINGLY USE, DISTRIBUTE OR RESELL THE JASPER SOFTWARE OR UNDERLYING + * TECHNOLOGY OR PRODUCTS FOR HIGH RISK ACTIVITIES AND WILL ENSURE THAT ITS + * CUSTOMERS AND END-USERS OF ITS PRODUCTS ARE PROVIDED WITH A COPY OF THE + * NOTICE SPECIFIED IN THIS SECTION. + * + * __END_OF_JASPER_LICENSE__ + */ + +/* + * Tier 1 Decoder + * + * $Id$ + */ + +/******************************************************************************\ +* 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) { \ + fprintf(stderr, "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) { \ + fprintf(stderr, "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) { + fprintf(stderr, "warning: corrupt code stream\n"); + } else { + if (cblk->numimsbs < ccp->roishift - band->numbps) { + fprintf(stderr, "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) { + fprintf(stderr, "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) { + fprintf(stderr, "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; + + 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; + + 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; + + 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; + + 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; + + 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) { + fprintf(stderr, "warning: bad segmentation symbol\n"); + } + } + + return 0; +} |