X-Git-Url: https://vcs.maemo.org/git/?a=blobdiff_plain;f=3rdparty%2Flibjasper%2Fjpc_t1dec.c;fp=3rdparty%2Flibjasper%2Fjpc_t1dec.c;h=4578c5d86296948372d8a92f386458144258e557;hb=e4c14cdbdf2fe805e79cd96ded236f57e7b89060;hp=0000000000000000000000000000000000000000;hpb=454138ff8a20f6edb9b65a910101403d8b520643;p=opencv diff --git a/3rdparty/libjasper/jpc_t1dec.c b/3rdparty/libjasper/jpc_t1dec.c new file mode 100644 index 0000000..4578c5d --- /dev/null +++ b/3rdparty/libjasper/jpc_t1dec.c @@ -0,0 +1,922 @@ +/* + * 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 +#include +#include + +#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; +}