/*
* 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 1.1 2008/10/17 06:15:00 scuri 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) {
// GeoJasper: dima - progress
jas_do_progress( (tcomp->numrlvls-rlvlcnt), (tcomp->numrlvls-1), "jpc: decode" );
if (jas_test_abort() == 1) return -1;
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;
}