+++ /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