diff options
Diffstat (limited to 'src/libjasper/jpc/jpc_t2dec.c')
| -rw-r--r-- | src/libjasper/jpc/jpc_t2dec.c | 581 |
1 files changed, 581 insertions, 0 deletions
diff --git a/src/libjasper/jpc/jpc_t2dec.c b/src/libjasper/jpc/jpc_t2dec.c new file mode 100644 index 0000000..0a79c88 --- /dev/null +++ b/src/libjasper/jpc/jpc_t2dec.c @@ -0,0 +1,581 @@ +/* + * 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: jpc_t2dec.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_types.h" +#include "jasper/jas_fix.h" +#include "jasper/jas_malloc.h" +#include "jasper/jas_math.h" +#include "jasper/jas_stream.h" +#include "jasper/jas_debug.h" + +#include "jpc_bs.h" +#include "jpc_dec.h" +#include "jpc_cs.h" +#include "jpc_mqdec.h" +#include "jpc_t2dec.h" +#include "jpc_t1cod.h" +#include "jpc_math.h" + +/******************************************************************************\ +* +\******************************************************************************/ + +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, int 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, int 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 n; + int m; + int i; + jpc_tagtreenode_t *leaf; + int included; + int ret; + int numnewpasses; + jpc_dec_seg_t *seg; + int len; + int present; + int savenumnewpasses; + int mycounter; + jpc_ms_t *ms; + jpc_dec_tile_t *tile; + jpc_dec_ccp_t *ccp; + jpc_dec_cp_t *cp; + int bandno; + jpc_dec_prc_t *prc; + int usedcblkcnt; + int cblkno; + uint_fast32_t bodylen; + bool discard; + int passno; + int maxpasses; + int hdrlen; + int hdroffstart; + int hdroffend; + + /* 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("missing SOP marker segment\n"); + return -1; + } + jpc_ms_destroy(ms); + } + } + +hdroffstart = jas_stream_getrwcount(pkthdrstream); + + if (!(inb = jpc_bitstream_sopen(pkthdrstream, "r"))) { + return -1; + } + + if ((present = jpc_bitstream_getbit(inb)) < 0) { + 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; + for (bandno = 0, band = rlvl->bands; bandno < rlvl->numbands; + ++bandno, ++band) { + if (!band->data) { + continue; + } + prc = &band->prcs[prcno]; + if (!prc->cblks) { + continue; + } + usedcblkcnt = 0; + for (cblkno = 0, cblk = prc->cblks; cblkno < 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) { + return -1; + } + } else { + if ((included = jpc_bitstream_getbit(inb)) < 0) { + return -1; + } + } + JAS_DBGLOG(10, ("\n")); + JAS_DBGLOG(10, ("included=%d ", included)); + if (!included) { + continue; + } + if (!cblk->numpasses) { + i = 1; + leaf = jpc_tagtree_getleaf(prc->numimsbstagtree, usedcblkcnt - 1); + for (;;) { + if ((ret = jpc_tagtree_decode(prc->numimsbstagtree, leaf, i, inb)) < 0) { + return -1; + } + if (ret) { + break; + } + ++i; + } + cblk->numimsbs = i - 1; + cblk->firstpassno = cblk->numimsbs * 3; + } + if ((numnewpasses = jpc_getnumnewpasses(inb)) < 0) { + return -1; + } + JAS_DBGLOG(10, ("numnewpasses=%d ", numnewpasses)); + seg = cblk->curseg; + savenumnewpasses = numnewpasses; + mycounter = 0; + if (numnewpasses > 0) { + if ((m = jpc_getcommacode(inb)) < 0) { + return -1; + } + cblk->numlenbits += m; + JAS_DBGLOG(10, ("increment=%d ", m)); + while (numnewpasses > 0) { + passno = cblk->firstpassno + cblk->numpasses + mycounter; + /* XXX - the maxpasses is not set precisely but this doesn't matter... */ + 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())) { + 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; + } + n = JAS_MIN(numnewpasses, maxpasses); + mycounter += n; + numnewpasses -= n; + if ((len = jpc_bitstream_getbits(inb, cblk->numlenbits + jpc_floorlog2(n))) < 0) { + 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"); + return -1; + } + } + jpc_bitstream_close(inb); + + hdroffend = jas_stream_getrwcount(pkthdrstream); + hdrlen = hdroffend - hdroffstart; + if (jas_getdbglevel() >= 5) { + jas_eprintf("hdrlen=%lu bodylen=%lu \n", (unsigned long) hdrlen, + (unsigned long) bodylen); + } + + if (cp->csty & JPC_COD_EPH) { + if (jpc_dec_lookahead(pkthdrstream) == JPC_MS_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]; + for (bandno = 0, band = rlvl->bands; bandno < rlvl->numbands; + ++bandno, ++band) { + if (!band->data) { + continue; + } + prc = &band->prcs[prcno]; + if (!prc->cblks) { + continue; + } + for (cblkno = 0, cblk = prc->cblks; cblkno < 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; + break; + case JPC_MS_SOP: + case JPC_MS_EPH: + case 0: + break; + default: + return -1; + break; + } +} + if ((ret = jpc_pi_next(pi))) { + return ret; + } +if (dec->maxpkts >= 0 && dec->numpkts >= 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; + } + + return 0; +} + +jpc_pi_t *jpc_dec_pi_create(jpc_dec_t *dec, jpc_dec_tile_t *tile) +{ + jpc_pi_t *pi; + int compno; + jpc_picomp_t *picomp; + jpc_pirlvl_t *pirlvl; + jpc_dec_tcomp_t *tcomp; + int rlvlno; + jpc_dec_rlvl_t *rlvl; + int prcno; + int *prclyrno; + jpc_dec_cmpt_t *cmpt; + + if (!(pi = jpc_pi_create0())) { + return 0; + } + pi->numcomps = dec->numcomps; + if (!(pi->picomps = jas_malloc(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_malloc(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_malloc(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; +} + +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 && x <= JPC_MS_INMAX) { + return x; + } + return 0; +} |