/* * 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; }