ref: 7cdf839293bf3c0b5c3f52d368635156530ddf85
dir: /jpc_t1dec.c/
/*
* 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
*
* $Id$
*/
/******************************************************************************\
* Includes.
\******************************************************************************/
#include "jpc_t1dec.h"
#include "jpc_bs.h"
#include "jpc_mqdec.h"
#include "jpc_t1cod.h"
#include "jpc_dec.h"
#include "jasper/jas_stream.h"
#include "jasper/jas_math.h"
#include "jasper/jas_debug.h"
/******************************************************************************\
*
\******************************************************************************/
static int jpc_dec_decodecblk(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_mqdec_t *mqdec, unsigned bitpos, enum jpc_tsfb_orient orient,
bool vcausalflag, jas_matrix_t *flags, jas_matrix_t *data);
static int dec_rawsigpass(jpc_bitstream_t *in, unsigned bitpos,
bool vcausalflag, jas_matrix_t *flags, jas_matrix_t *data);
static int dec_refpass(jpc_mqdec_t *mqdec, unsigned bitpos,
jas_matrix_t *flags, jas_matrix_t *data);
static int dec_rawrefpass(jpc_bitstream_t *in, unsigned bitpos,
jas_matrix_t *flags, jas_matrix_t *data);
static int dec_clnpass(jpc_mqdec_t *mqdec, unsigned bitpos, enum jpc_tsfb_orient orient,
bool vcausalflag, bool segsymflag, jas_matrix_t *flags, jas_matrix_t *data);
#ifndef NDEBUG
static long t1dec_cnt = 0;
#endif
JAS_FORCE_INLINE
static bool JPC_T1D_GETBIT(jpc_mqdec_t *mqdec, const char *passtypename, const char *symtypename)
{
bool v = jpc_mqdec_getbit(mqdec);
#ifndef NDEBUG
if (jas_getdbglevel() >= 100) {
jas_eprintf("index = %ld; passtype = %s; symtype = %s; sym = %d\n", t1dec_cnt, passtypename, symtypename, v);
++t1dec_cnt;
}
#else
(void)passtypename;
(void)symtypename;
#endif
return v;
}
JAS_FORCE_INLINE
static bool JPC_T1D_GETBITNOSKEW(jpc_mqdec_t *mqdec, const char *passtypename, const char *symtypename)
{
return JPC_T1D_GETBIT(mqdec, passtypename, symtypename);
}
JAS_FORCE_INLINE
static int JPC_T1D_RAWGETBIT(jpc_bitstream_t *bitstream, const char *passtypename, const char *symtypename)
{
int v = jpc_bitstream_getbit(bitstream);
#ifndef NDEBUG
if (jas_getdbglevel() >= 100) {
jas_eprintf("index = %ld; passtype = %s; symtype = %s; sym = %d\n", t1dec_cnt, passtypename, symtypename, v);
++t1dec_cnt;
}
#else
(void)passtypename;
(void)symtypename;
#endif
return v;
}
/******************************************************************************\
* Code.
\******************************************************************************/
int jpc_dec_decodecblks(jpc_dec_t *dec, jpc_dec_tile_t *tile)
{
jpc_dec_tcomp_t *tcomp;
jpc_dec_rlvl_t *rlvl;
jpc_dec_band_t *band;
jpc_dec_prc_t *prc;
jpc_dec_cblk_t *cblk;
unsigned compcnt;
for (compcnt = dec->numcomps, tcomp = tile->tcomps; compcnt > 0;
--compcnt, ++tcomp) {
unsigned rlvlcnt;
for (rlvlcnt = tcomp->numrlvls, rlvl = tcomp->rlvls;
rlvlcnt > 0; --rlvlcnt, ++rlvl) {
if (!rlvl->bands) {
continue;
}
unsigned bandcnt;
for (bandcnt = rlvl->numbands, band = rlvl->bands;
bandcnt > 0; --bandcnt, ++band) {
if (!band->data) {
continue;
}
unsigned prccnt;
for (prccnt = rlvl->numprcs, prc = band->prcs;
prccnt > 0; --prccnt, ++prc) {
if (!prc->cblks) {
continue;
}
unsigned cblkcnt;
for (cblkcnt = prc->numcblks,
cblk = prc->cblks; cblkcnt > 0;
--cblkcnt, ++cblk) {
if (jpc_dec_decodecblk(tile, tcomp,
band, cblk, 1, JPC_MAXLYRS)) {
return -1;
}
}
}
}
}
}
return 0;
}
static int jpc_dec_decodecblk(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 bpno;
int ret = -1;
int filldata;
int fillmask;
const size_t compno = tcomp - tile->tcomps;
const jpc_dec_ccp_t *const ccp = &tile->cp->ccps[compno];
/* The MQ decoder. */
jpc_mqdec_t *mqdec = NULL;
/* The raw bit stream decoder. */
jpc_bitstream_t *nulldec = NULL;
/* The per-sample state information for this code block. */
/* Note: matrix is assumed to be zeroed */
jas_matrix_t *const flags = jas_matrix_create(jas_matrix_numrows(cblk->data) + 2, jas_matrix_numcols(cblk->data) + 2);
if (!flags)
goto error;
seg = cblk->segs.head;
while (seg && (seg != cblk->curseg || dopartial) && (maxlyrs < 0 ||
seg->lyrno < (unsigned)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 (!mqdec) {
if (!(mqdec = jpc_mqdec_create(JPC_NUMCTXS, 0))) {
goto error;
}
jpc_mqdec_setctxs(mqdec, JPC_NUMCTXS, jpc_mqctxs);
}
jpc_mqdec_setinput(mqdec, seg->stream);
jpc_mqdec_init(mqdec);
} else {
assert(seg->type == JPC_SEG_RAW);
if (!nulldec) {
if (!(nulldec = jpc_bitstream_sopen(seg->stream, "r"))) {
goto error;
}
}
}
for (unsigned i = 0; i < seg->numpasses; ++i) {
if (cblk->numimsbs > band->numbps) {
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;
}
enum jpc_passtype passtype = JPC_PASSTYPE(seg->passno + i);
assert(bpno >= 0 && bpno < 31);
switch (passtype) {
case JPC_SIGPASS:
ret = (seg->type == JPC_SEG_MQ) ? dec_sigpass(mqdec, bpno, band->orient,
(ccp->cblkctx & JPC_COX_VSC) != 0,
flags, cblk->data) :
dec_rawsigpass(nulldec, bpno,
(ccp->cblkctx & JPC_COX_VSC) != 0,
flags, cblk->data);
break;
case JPC_REFPASS:
ret = (seg->type == JPC_SEG_MQ) ?
dec_refpass(mqdec, bpno,
flags, cblk->data) :
dec_rawrefpass(nulldec, bpno,
flags, cblk->data);
break;
case JPC_CLNPASS:
assert(seg->type == JPC_SEG_MQ);
ret = dec_clnpass(mqdec, bpno,
band->orient, (ccp->cblkctx &
JPC_COX_VSC) != 0, (ccp->cblkctx &
JPC_COX_SEGSYM) != 0, flags,
cblk->data);
break;
default:
assert(false);
JAS_UNREACHABLE();
}
/* Do we need to reset after each coding pass? */
if ((ccp->cblkctx & JPC_COX_RESET) && mqdec) {
jpc_mqdec_setctxs(mqdec, JPC_NUMCTXS, jpc_mqctxs);
}
if (ret) {
jas_eprintf("coding pass failed passtype=%d segtype=%d\n", passtype, seg->type);
goto error;
}
}
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 (ccp->cblkctx & JPC_COX_PTERM) {
fillmask = 0x7f;
filldata = 0x2a;
} else {
fillmask = 0;
filldata = 0;
}
if ((ret = jpc_bitstream_inalign(nulldec, fillmask,
filldata)) < 0) {
goto error;
} else if (ret > 0) {
jas_eprintf("warning: bad termination pattern detected\n");
}
jpc_bitstream_close(nulldec);
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:
if (mqdec)
jpc_mqdec_destroy(mqdec);
if (nulldec)
jpc_bitstream_close(nulldec);
if (flags)
jas_matrix_destroy(flags);
return 0;
error:
if (mqdec)
jpc_mqdec_destroy(mqdec);
if (nulldec)
jpc_bitstream_close(nulldec);
if (flags)
jas_matrix_destroy(flags);
return -1;
}
/******************************************************************************\
* Code for significance pass.
\******************************************************************************/
JAS_FORCE_INLINE
static void jpc_sigpass_step(jpc_fix_t *fp, size_t frowstep, jpc_fix_t *dp, jpc_fix_t oneplushalf, enum jpc_tsfb_orient orient, jpc_mqdec_t *mqdec, bool vcausalflag)
{
const jpc_fix_t f = *(fp);
if ((f & JPC_OTHSIGMSK) && !(f & (JPC_SIG | JPC_VISIT))) {
jpc_mqdec_setcurctx(mqdec, JPC_GETZCCTXNO(f, orient));
if (JPC_T1D_GETBIT(mqdec, "SIG", "ZC")) {
jpc_mqdec_setcurctx(mqdec, JPC_GETSCCTXNO(f));
bool v = JPC_T1D_GETBIT(mqdec, "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_mqdec_t *mqdec, unsigned bitpos, enum jpc_tsfb_orient orient,
bool vcausalflag, jas_matrix_t *flags, jas_matrix_t *data)
{
int i;
jpc_fix_t *fp;
jpc_fix_t *fstripestart;
jpc_fix_t *fvscanstart;
jpc_fix_t *dp;
jpc_fix_t *dstripestart;
jpc_fix_t *dvscanstart;
const unsigned width = jas_matrix_numcols(data);
const unsigned height = jas_matrix_numrows(data);
const unsigned frowstep = jas_matrix_rowstep(flags);
const unsigned drowstep = jas_matrix_rowstep(data);
const unsigned fstripestep = frowstep << 2;
const unsigned dstripestep = drowstep << 2;
const jpc_fix_t one = (jpc_fix_t)1 << bitpos;
const jpc_fix_t half = one >> 1;
const jpc_fix_t 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;
const unsigned vscanlen = JAS_MIN(i, 4);
for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
fp = fvscanstart;
dp = dvscanstart;
unsigned k = vscanlen;
/* Process first sample in vertical scan. */
jpc_sigpass_step(fp, frowstep, dp, oneplushalf,
orient, mqdec, vcausalflag);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
/* Process second sample in vertical scan. */
jpc_sigpass_step(fp, frowstep, dp, oneplushalf,
orient, mqdec, 0);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
/* Process third sample in vertical scan. */
jpc_sigpass_step(fp, frowstep, dp, oneplushalf,
orient, mqdec, 0);
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
/* Process fourth sample in vertical scan. */
jpc_sigpass_step(fp, frowstep, dp, oneplushalf,
orient, mqdec, 0);
}
}
return 0;
}
JAS_FORCE_INLINE
static int jpc_rawsigpass_step(jpc_fix_t *fp, size_t frowstep, jpc_fix_t *dp, jpc_fix_t oneplushalf, jpc_bitstream_t *in, bool vcausalflag)
{
const jpc_fix_t f = *fp;
if ((f & JPC_OTHSIGMSK) && !(f & (JPC_SIG | JPC_VISIT))) {
int v = JPC_T1D_RAWGETBIT(in, "SIG", "ZC");
if (v < 0) {
return -1;
}
if (v) {
v = JPC_T1D_RAWGETBIT(in, "SIG", "SC");
if (v < 0) {
return -1;
}
JPC_UPDATEFLAGS4(fp, frowstep, v, vcausalflag);
*fp |= JPC_SIG;
*dp = v ? -oneplushalf : oneplushalf;
}
*fp |= JPC_VISIT;
}
return 0;
}
static int dec_rawsigpass(jpc_bitstream_t *in, unsigned bitpos, bool vcausalflag,
jas_matrix_t *flags, jas_matrix_t *data)
{
int i;
jpc_fix_t *fp;
jpc_fix_t *fstripestart;
jpc_fix_t *fvscanstart;
jpc_fix_t *dp;
jpc_fix_t *dstripestart;
jpc_fix_t *dvscanstart;
const unsigned width = jas_matrix_numcols(data);
const unsigned height = jas_matrix_numrows(data);
const unsigned frowstep = jas_matrix_rowstep(flags);
const unsigned drowstep = jas_matrix_rowstep(data);
const unsigned fstripestep = frowstep << 2;
const unsigned dstripestep = drowstep << 2;
const jpc_fix_t one = (jpc_fix_t)1 << bitpos;
const jpc_fix_t half = one >> 1;
const jpc_fix_t 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;
const unsigned vscanlen = JAS_MIN(i, 4);
for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
fp = fvscanstart;
dp = dvscanstart;
unsigned k = vscanlen;
/* Process first sample in vertical scan. */
if (jpc_rawsigpass_step(fp, frowstep, dp, oneplushalf, in, vcausalflag))
return -1;
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
/* Process second sample in vertical scan. */
if (jpc_rawsigpass_step(fp, frowstep, dp, oneplushalf, in, 0))
return -1;
if (--k <= 0) {
continue;
}
fp += frowstep;
dp += drowstep;
/* Process third sample in vertical scan. */
if (jpc_rawsigpass_step(fp, frowstep, dp, oneplushalf, in, 0))
return -1;
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.
\******************************************************************************/
JAS_FORCE_INLINE
static void jpc_refpass_step(jpc_fix_t *fp, jpc_fix_t *dp, jpc_fix_t poshalf, jpc_fix_t neghalf, jpc_mqdec_t *mqdec)
{
if (((*(fp)) & (JPC_SIG | JPC_VISIT)) == JPC_SIG) { \
jpc_mqdec_setcurctx(mqdec, JPC_GETMAGCTXNO(*fp));
const bool v = JPC_T1D_GETBITNOSKEW(mqdec, "REF", "MR");
const jpc_fix_t t = v ? poshalf : neghalf;
*dp += *dp < 0 ? -t : t;
*fp |= JPC_REFINE;
}
}
static int dec_refpass(jpc_mqdec_t *mqdec, unsigned bitpos,
jas_matrix_t *flags, jas_matrix_t *data)
{
int i;
jpc_fix_t *fp;
jpc_fix_t *fstripestart;
jpc_fix_t *fvscanstart;
jpc_fix_t *dp;
jpc_fix_t *dstripestart;
jpc_fix_t *dvscanstart;
const unsigned width = jas_matrix_numcols(data);
const unsigned height = jas_matrix_numrows(data);
const unsigned frowstep = jas_matrix_rowstep(flags);
const unsigned drowstep = jas_matrix_rowstep(data);
const unsigned fstripestep = frowstep << 2;
const unsigned dstripestep = drowstep << 2;
const jpc_fix_t one = (jpc_fix_t)1 << bitpos;
const jpc_fix_t poshalf = one >> 1;
const jpc_fix_t 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;
const unsigned vscanlen = JAS_MIN(i, 4);
for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
fp = fvscanstart;
dp = dvscanstart;
for (unsigned k = 0; k < vscanlen; ++k) {
jpc_refpass_step(fp, dp, poshalf, neghalf, mqdec);
fp += frowstep;
dp += drowstep;
}
}
}
return 0;
}
static int jpc_rawrefpass_step(jpc_fix_t *fp, jpc_fix_t *dp, jpc_fix_t poshalf, jpc_fix_t neghalf, jpc_bitstream_t *in)
{
if ((*fp & (JPC_SIG | JPC_VISIT)) == JPC_SIG) {
int v = JPC_T1D_RAWGETBIT(in, "REF", "MAGREF");
if (v < 0) {
return -1;
}
jpc_fix_t t = v ? poshalf : neghalf;
*dp += *dp < 0 ? -t : t;
*fp |= JPC_REFINE;
}
return 0;
}
static int dec_rawrefpass(jpc_bitstream_t *in, unsigned bitpos,
jas_matrix_t *flags, jas_matrix_t *data)
{
int i;
jpc_fix_t *fp;
jpc_fix_t *fstripestart;
jpc_fix_t *fvscanstart;
jpc_fix_t *dp;
jpc_fix_t *dstripestart;
jpc_fix_t *dvscanstart;
const unsigned width = jas_matrix_numcols(data);
const unsigned height = jas_matrix_numrows(data);
const unsigned frowstep = jas_matrix_rowstep(flags);
const unsigned drowstep = jas_matrix_rowstep(data);
const unsigned fstripestep = frowstep << 2;
const unsigned dstripestep = drowstep << 2;
const jpc_fix_t one = (jpc_fix_t)1 << bitpos;
const jpc_fix_t poshalf = one >> 1;
const jpc_fix_t 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;
const unsigned vscanlen = JAS_MIN(i, 4);
for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
fp = fvscanstart;
dp = dvscanstart;
for (unsigned k = 0; k < vscanlen; ++k) {
if (jpc_rawrefpass_step(fp, dp, poshalf, neghalf, in))
return -1;
fp += frowstep;
dp += drowstep;
}
}
}
return 0;
}
/******************************************************************************\
* Code for cleanup pass.
\******************************************************************************/
#define jpc_clnpass_step(f, fp, frowstep, dp, oneplushalf, orient, mqdec, flabel, plabel, vcausalflag) \
{ \
flabel \
if (!((f) & (JPC_SIG | JPC_VISIT))) { \
jpc_mqdec_setcurctx((mqdec), JPC_GETZCCTXNO((f), (orient))); \
if (JPC_T1D_GETBIT((mqdec), "CLN", "ZC")) { \
plabel \
/* Coefficient is significant. */ \
jpc_mqdec_setcurctx((mqdec), JPC_GETSCCTXNO(f)); \
bool v = JPC_T1D_GETBIT((mqdec), "CLN", "SC"); \
v ^= JPC_GETSPB(f); \
*(dp) = (v) ? (-(jpc_fix_t)(oneplushalf)) : (jpc_fix_t)(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_mqdec_t *mqdec, unsigned bitpos, enum jpc_tsfb_orient orient,
bool vcausalflag, bool segsymflag, jas_matrix_t *flags, jas_matrix_t *data)
{
int f;
jpc_fix_t *fp;
jpc_fix_t *fstripestart;
jpc_fix_t *fvscanstart;
jpc_fix_t *dp;
jpc_fix_t *dstripestart;
jpc_fix_t *dvscanstart;
const jpc_fix_t one = (jpc_fix_t)1 << bitpos;
const jpc_fix_t half = one >> 1;
const jpc_fix_t oneplushalf = one | half;
const unsigned width = jas_matrix_numcols(data);
const unsigned height = jas_matrix_numrows(data);
const unsigned frowstep = jas_matrix_rowstep(flags);
const unsigned drowstep = jas_matrix_rowstep(data);
const unsigned fstripestep = frowstep << 2;
const unsigned dstripestep = drowstep << 2;
fstripestart = jas_matrix_getref(flags, 1, 1);
dstripestart = jas_matrix_getref(data, 0, 0);
for (unsigned i = 0; i < height; i += 4, fstripestart += fstripestep,
dstripestart += dstripestep) {
fvscanstart = fstripestart;
dvscanstart = dstripestart;
const unsigned vscanlen = JAS_MIN(4, height - i);
for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {
fp = fvscanstart;
unsigned k;
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);
if (!JPC_T1D_GETBIT(mqdec, "CLN", "AGG")) {
continue;
}
jpc_mqdec_setcurctx(mqdec, JPC_UCTXNO);
unsigned runlen = JPC_T1D_GETBITNOSKEW(mqdec, "CLN", "RL");
runlen = (runlen << 1) | JPC_T1D_GETBITNOSKEW(mqdec, "CLN", "RL");
f = *(fp = fvscanstart + frowstep * runlen);
dp = dvscanstart + drowstep * runlen;
k = vscanlen - runlen;
switch (runlen) {
case 0:
goto clnpass_partial0;
case 1:
goto clnpass_partial1;
case 2:
goto clnpass_partial2;
case 3:
goto clnpass_partial3;
}
} 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) {
unsigned segsymval = 0;
jpc_mqdec_setcurctx(mqdec, JPC_UCTXNO);
segsymval = (segsymval << 1) | JPC_T1D_GETBITNOSKEW(mqdec, "CLN", "SEGSYM");
segsymval = (segsymval << 1) | JPC_T1D_GETBITNOSKEW(mqdec, "CLN", "SEGSYM");
segsymval = (segsymval << 1) | JPC_T1D_GETBITNOSKEW(mqdec, "CLN", "SEGSYM");
segsymval = (segsymval << 1) | JPC_T1D_GETBITNOSKEW(mqdec, "CLN", "SEGSYM");
if (segsymval != 0xa) {
jas_eprintf("warning: bad segmentation symbol\n");
}
}
return 0;
}