ref: 7cdf839293bf3c0b5c3f52d368635156530ddf85
dir: /jpc_t2dec.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 2 Decoder
*
* $Id$
*/
/******************************************************************************\
* Includes.
\******************************************************************************/
#include "jpc_t2dec.h"
#include "jpc_bs.h"
#include "jpc_dec.h"
#include "jpc_cs.h"
#include "jpc_t1cod.h"
#include "jpc_math.h"
#include "jasper/jas_types.h"
#include "jasper/jas_malloc.h"
#include "jasper/jas_math.h"
#include "jasper/jas_stream.h"
#include "jasper/jas_debug.h"
/******************************************************************************\
*
\******************************************************************************/
static long jpc_dec_lookahead(jas_stream_t *in);
static int jpc_getcommacode(jpc_bitstream_t *in);
static int jpc_getnumnewpasses(jpc_bitstream_t *in);
static int jpc_dec_decodepkt(jpc_dec_t *dec, jas_stream_t *pkthdrstream, jas_stream_t *in, int compno, int lvlno,
int prcno, unsigned lyrno);
/******************************************************************************\
* Code.
\******************************************************************************/
static int jpc_getcommacode(jpc_bitstream_t *in)
{
int n;
int v;
n = 0;
for (;;) {
if ((v = jpc_bitstream_getbit(in)) < 0) {
return -1;
}
if (jpc_bitstream_eof(in)) {
return -1;
}
if (!v) {
break;
}
++n;
}
return n;
}
static int jpc_getnumnewpasses(jpc_bitstream_t *in)
{
int n;
if ((n = jpc_bitstream_getbit(in)) > 0) {
if ((n = jpc_bitstream_getbit(in)) > 0) {
if ((n = jpc_bitstream_getbits(in, 2)) == 3) {
if ((n = jpc_bitstream_getbits(in, 5)) == 31) {
if ((n = jpc_bitstream_getbits(in, 7)) >= 0) {
n += 36 + 1;
}
} else if (n >= 0) {
n += 5 + 1;
}
} else if (n >= 0) {
n += 2 + 1;
}
} else if (!n) {
n += 2;
}
} else if (!n) {
++n;
}
return n;
}
static int jpc_dec_decodepkt(jpc_dec_t *dec, jas_stream_t *pkthdrstream, jas_stream_t *in, int compno, int rlvlno,
int prcno, unsigned lyrno)
{
jpc_bitstream_t *inb;
jpc_dec_tcomp_t *tcomp;
jpc_dec_rlvl_t *rlvl;
jpc_dec_band_t *band;
jpc_dec_cblk_t *cblk;
int m;
jpc_tagtreenode_t *leaf;
int included;
int ret;
int numnewpasses;
jpc_dec_seg_t *seg;
int len;
int present;
jpc_ms_t *ms;
jpc_dec_tile_t *tile;
jpc_dec_ccp_t *ccp;
jpc_dec_cp_t *cp;
jpc_dec_prc_t *prc;
uint_fast32_t bodylen;
bool discard;
/* Avoid compiler warning about possible use of uninitialized
variable. */
bodylen = 0;
discard = (lyrno >= dec->maxlyrs);
tile = dec->curtile;
cp = tile->cp;
ccp = &cp->ccps[compno];
/*
* Decode the packet header.
*/
/* Decode the SOP marker segment if present. */
if (cp->csty & JPC_COD_SOP) {
if (jpc_dec_lookahead(in) == JPC_MS_SOP) {
if (!(ms = jpc_getms(in, dec->cstate))) {
return -1;
}
if (jpc_ms_gettype(ms) != JPC_MS_SOP) {
jpc_ms_destroy(ms);
jas_eprintf("cannot get (SOP) marker segment\n");
return -1;
}
unsigned int maxNsop = 65536;
/* checking the packet sequence number */
if (tile->pi->pktno % maxNsop != ms->parms.sop.seqno) {
jas_eprintf("incorrect packet sequence number %d was found, but expected %d\n",
ms->parms.sop.seqno, tile->pi->pktno % maxNsop);
jpc_ms_destroy(ms);
return -1;
}
jpc_ms_destroy(ms);
}
}
const uint_least64_t hdroffstart = jas_stream_getrwcount(pkthdrstream);
if (!(inb = jpc_bitstream_sopen(pkthdrstream, "r"))) {
return -1;
}
if ((present = jpc_bitstream_getbit(inb)) < 0) {
jpc_bitstream_close(inb);
return 1;
}
JAS_DBGLOG(10, ("\n", present));
JAS_DBGLOG(10, ("present=%d ", present));
/* Is the packet non-empty? */
if (present) {
/* The packet is non-empty. */
tcomp = &tile->tcomps[compno];
rlvl = &tcomp->rlvls[rlvlno];
bodylen = 0;
unsigned bandno;
for (bandno = 0, band = rlvl->bands; bandno < (unsigned)rlvl->numbands;
++bandno, ++band) {
if (!band->data) {
continue;
}
prc = &band->prcs[prcno];
if (!prc->cblks) {
continue;
}
unsigned cblkno;
unsigned usedcblkcnt = 0;
for (cblkno = 0, cblk = prc->cblks; cblkno < (unsigned)prc->numcblks;
++cblkno, ++cblk) {
++usedcblkcnt;
if (!cblk->numpasses) {
leaf = jpc_tagtree_getleaf(prc->incltagtree, usedcblkcnt - 1);
if ((included = jpc_tagtree_decode(prc->incltagtree, leaf, lyrno + 1, inb)) < 0) {
jpc_bitstream_close(inb);
return -1;
}
} else {
if ((included = jpc_bitstream_getbit(inb)) < 0) {
jpc_bitstream_close(inb);
return -1;
}
}
JAS_DBGLOG(10, ("\n"));
JAS_DBGLOG(10, ("included=%d ", included));
if (!included) {
continue;
}
if (!cblk->numpasses) {
unsigned i = 1;
leaf = jpc_tagtree_getleaf(prc->numimsbstagtree, usedcblkcnt - 1);
for (;;) {
if ((ret = jpc_tagtree_decode(prc->numimsbstagtree, leaf, i, inb)) < 0) {
jpc_bitstream_close(inb);
return -1;
}
if (ret) {
break;
}
++i;
}
cblk->numimsbs = i - 1;
cblk->firstpassno = cblk->numimsbs * 3;
}
if ((numnewpasses = jpc_getnumnewpasses(inb)) < 0) {
jpc_bitstream_close(inb);
return -1;
}
JAS_DBGLOG(10, ("numnewpasses=%d ", numnewpasses));
seg = cblk->curseg;
const unsigned savenumnewpasses = numnewpasses;
unsigned mycounter = 0;
if (numnewpasses > 0) {
if (cblk->firstpassno > 10000) {
/* workaround for
CVE-2016-9398: this
large value would
make
JPC_SEGPASSCNT()
return a negative
value, causing an
assertion failure
in
jpc_floorlog2() */
jpc_bitstream_close(inb);
return -1;
}
if ((m = jpc_getcommacode(inb)) < 0) {
jpc_bitstream_close(inb);
return -1;
}
cblk->numlenbits += m;
JAS_DBGLOG(10, ("increment=%d ", m));
while (numnewpasses > 0) {
const unsigned passno = cblk->firstpassno + cblk->numpasses + mycounter;
if (passno >= 10000) {
/* with this value,
JPC_SEGPASSCNT()
would return 0,
which is an illegal
value and would
later crash in
jpc_floorlog2() */
jpc_bitstream_close(inb);
return -1;
}
/* XXX - the maxpasses is not set precisely but this doesn't matter... */
const unsigned maxpasses = JPC_SEGPASSCNT(passno, cblk->firstpassno, 10000, (ccp->cblkctx & JPC_COX_LAZY) != 0, (ccp->cblkctx & JPC_COX_TERMALL) != 0);
if (!discard && !seg) {
if (!(seg = jpc_seg_alloc())) {
jpc_bitstream_close(inb);
return -1;
}
jpc_seglist_insert(&cblk->segs, cblk->segs.tail, seg);
if (!cblk->curseg) {
cblk->curseg = seg;
}
seg->passno = passno;
seg->type = JPC_SEGTYPE(seg->passno, cblk->firstpassno, (ccp->cblkctx & JPC_COX_LAZY) != 0);
seg->maxpasses = maxpasses;
}
const unsigned n = JAS_MIN((unsigned)numnewpasses, maxpasses);
mycounter += n;
numnewpasses -= n;
if ((len = jpc_bitstream_getbits(inb, cblk->numlenbits + jpc_floorlog2(n))) < 0) {
jpc_bitstream_close(inb);
return -1;
}
JAS_DBGLOG(10, ("len=%d ", len));
if (!discard) {
seg->lyrno = lyrno;
seg->numpasses += n;
seg->cnt = len;
seg = seg->next;
}
bodylen += len;
}
}
cblk->numpasses += savenumnewpasses;
}
}
jpc_bitstream_inalign(inb, 0, 0);
} else {
if (jpc_bitstream_inalign(inb, 0x7f, 0)) {
jas_eprintf("alignment failed\n");
jpc_bitstream_close(inb);
return -1;
}
}
jpc_bitstream_close(inb);
if (jas_getdbglevel() >= 5) {
const uint_least64_t hdroffend = jas_stream_getrwcount(pkthdrstream);
const unsigned long hdrlen = hdroffend - hdroffstart;
jas_eprintf("hdrlen=%lu bodylen=%lu \n", (unsigned long) hdrlen,
(unsigned long) bodylen);
}
if (cp->csty & JPC_COD_EPH) {
if (!(ms = jpc_getms(pkthdrstream, dec->cstate))) {
jas_eprintf("cannot get (EPH) marker segment\n");
return -1;
}
if (jpc_ms_gettype(ms) != JPC_MS_EPH) {
jpc_ms_destroy(ms);
jas_eprintf("missing EPH marker segment\n");
return -1;
}
jpc_ms_destroy(ms);
}
/* decode the packet body. */
if (jas_getdbglevel() >= 1) {
jas_eprintf("packet body offset=%06ld\n", (long) jas_stream_getrwcount(in));
}
if (!discard) {
tcomp = &tile->tcomps[compno];
rlvl = &tcomp->rlvls[rlvlno];
unsigned bandno;
for (bandno = 0, band = rlvl->bands; bandno < (unsigned)rlvl->numbands;
++bandno, ++band) {
if (!band->data) {
continue;
}
prc = &band->prcs[prcno];
if (!prc->cblks) {
continue;
}
unsigned cblkno;
for (cblkno = 0, cblk = prc->cblks; cblkno < (unsigned)prc->numcblks;
++cblkno, ++cblk) {
seg = cblk->curseg;
while (seg) {
if (!seg->stream) {
if (!(seg->stream = jas_stream_memopen(0, 0))) {
return -1;
}
}
#if 0
jas_eprintf("lyrno=%02d, compno=%02d, lvlno=%02d, prcno=%02d, bandno=%02d, cblkno=%02d, passno=%02d numpasses=%02d cnt=%d numbps=%d, numimsbs=%d\n", lyrno, compno, rlvlno, prcno, band - rlvl->bands, cblk - prc->cblks, seg->passno, seg->numpasses, seg->cnt, band->numbps, cblk->numimsbs);
#endif
if (seg->cnt > 0) {
if (jpc_getdata(in, seg->stream, seg->cnt) < 0) {
return -1;
}
seg->cnt = 0;
}
if (seg->numpasses >= seg->maxpasses) {
cblk->curseg = seg->next;
}
seg = seg->next;
}
}
}
} else {
if (jas_stream_gobble(in, bodylen) != JAS_CAST(int, bodylen)) {
return -1;
}
}
return 0;
}
/********************************************************************************************/
/********************************************************************************************/
int jpc_dec_decodepkts(jpc_dec_t *dec, jas_stream_t *pkthdrstream, jas_stream_t *in)
{
jpc_dec_tile_t *tile;
jpc_pi_t *pi;
int ret;
tile = dec->curtile;
pi = tile->pi;
for (;;) {
if (!tile->pkthdrstream || jas_stream_peekc(tile->pkthdrstream) == EOF) {
switch (jpc_dec_lookahead(in)) {
case JPC_MS_EOC:
case JPC_MS_SOT:
return 0;
case JPC_MS_SOP:
case JPC_MS_EPH:
case 0:
break;
default:
return -1;
}
}
if ((ret = jpc_pi_next(pi))) {
return ret;
}
if (dec->maxpkts >= 0 && dec->numpkts >= (unsigned)dec->maxpkts) {
jas_eprintf("warning: stopping decode prematurely as requested\n");
return 0;
}
if (jas_getdbglevel() >= 1) {
jas_eprintf("packet offset=%08ld prg=%d cmptno=%02d "
"rlvlno=%02d prcno=%03d lyrno=%02d\n", (long)
jas_stream_getrwcount(in), jpc_pi_prg(pi), jpc_pi_cmptno(pi),
jpc_pi_rlvlno(pi), jpc_pi_prcno(pi), jpc_pi_lyrno(pi));
}
if (jpc_dec_decodepkt(dec, pkthdrstream, in, jpc_pi_cmptno(pi),
jpc_pi_rlvlno(pi), jpc_pi_prcno(pi), jpc_pi_lyrno(pi))) {
return -1;
}
++dec->numpkts;
}
}
jpc_pi_t *jpc_dec_pi_create(jpc_dec_t *dec, jpc_dec_tile_t *tile)
{
jpc_pi_t *pi;
unsigned compno;
jpc_picomp_t *picomp;
jpc_pirlvl_t *pirlvl;
jpc_dec_tcomp_t *tcomp;
unsigned rlvlno;
jpc_dec_rlvl_t *rlvl;
unsigned prcno;
unsigned *prclyrno;
jpc_dec_cmpt_t *cmpt;
if (!(pi = jpc_pi_create0())) {
return 0;
}
pi->numcomps = dec->numcomps;
if (!(pi->picomps = jas_alloc2(pi->numcomps, sizeof(jpc_picomp_t)))) {
jpc_pi_destroy(pi);
return 0;
}
for (compno = 0, picomp = pi->picomps; compno < pi->numcomps; ++compno,
++picomp) {
picomp->pirlvls = 0;
}
for (compno = 0, tcomp = tile->tcomps, picomp = pi->picomps;
compno < pi->numcomps; ++compno, ++tcomp, ++picomp) {
picomp->numrlvls = tcomp->numrlvls;
if (!(picomp->pirlvls = jas_alloc2(picomp->numrlvls,
sizeof(jpc_pirlvl_t)))) {
jpc_pi_destroy(pi);
return 0;
}
for (rlvlno = 0, pirlvl = picomp->pirlvls; rlvlno <
picomp->numrlvls; ++rlvlno, ++pirlvl) {
pirlvl->prclyrnos = 0;
}
for (rlvlno = 0, pirlvl = picomp->pirlvls, rlvl = tcomp->rlvls;
rlvlno < picomp->numrlvls; ++rlvlno, ++pirlvl, ++rlvl) {
/* XXX sizeof(long) should be sizeof different type */
pirlvl->numprcs = rlvl->numprcs;
if (!(pirlvl->prclyrnos = jas_alloc2(pirlvl->numprcs,
sizeof(long)))) {
jpc_pi_destroy(pi);
return 0;
}
}
}
pi->maxrlvls = 0;
for (compno = 0, tcomp = tile->tcomps, picomp = pi->picomps, cmpt =
dec->cmpts; compno < pi->numcomps; ++compno, ++tcomp, ++picomp,
++cmpt) {
picomp->hsamp = cmpt->hstep;
picomp->vsamp = cmpt->vstep;
for (rlvlno = 0, pirlvl = picomp->pirlvls, rlvl = tcomp->rlvls;
rlvlno < picomp->numrlvls; ++rlvlno, ++pirlvl, ++rlvl) {
pirlvl->prcwidthexpn = rlvl->prcwidthexpn;
pirlvl->prcheightexpn = rlvl->prcheightexpn;
for (prcno = 0, prclyrno = pirlvl->prclyrnos;
prcno < pirlvl->numprcs; ++prcno, ++prclyrno) {
*prclyrno = 0;
}
pirlvl->numhprcs = rlvl->numhprcs;
}
if (pi->maxrlvls < tcomp->numrlvls) {
pi->maxrlvls = tcomp->numrlvls;
}
}
pi->numlyrs = tile->cp->numlyrs;
pi->xstart = tile->xstart;
pi->ystart = tile->ystart;
pi->xend = tile->xend;
pi->yend = tile->yend;
pi->picomp = 0;
pi->pirlvl = 0;
pi->x = 0;
pi->y = 0;
pi->compno = 0;
pi->rlvlno = 0;
pi->prcno = 0;
pi->lyrno = 0;
pi->xstep = 0;
pi->ystep = 0;
pi->pchgno = -1;
pi->defaultpchg.prgord = tile->cp->prgord;
pi->defaultpchg.compnostart = 0;
pi->defaultpchg.compnoend = pi->numcomps;
pi->defaultpchg.rlvlnostart = 0;
pi->defaultpchg.rlvlnoend = pi->maxrlvls;
pi->defaultpchg.lyrnoend = pi->numlyrs;
pi->pchg = 0;
pi->valid = 0;
return pi;
}
static long jpc_dec_lookahead(jas_stream_t *in)
{
uint_fast16_t x;
if (jpc_getuint16(in, &x)) {
return -1;
}
if (jas_stream_ungetc(in, x & 0xff) == EOF ||
jas_stream_ungetc(in, x >> 8) == EOF) {
return -1;
}
if (x >= JPC_MS_INMIN) {
return x;
}
return 0;
}