/* Read a marker segment from a stream. */
jpc_ms_t *jpc_getms(jas_stream_t *in, jpc_cstate_t *cstate)
{
jpc_ms_t *ms;
jpc_mstabent_t *mstabent;
jas_stream_t *tmpstream;
if (!(ms = jpc_ms_create(0))) {
return 0;
}
/* Get the marker type. */
if (jpc_getuint16(in, &ms->id) || ms->id < JPC_MS_MIN ||
ms->id > JPC_MS_MAX) {
jpc_ms_destroy(ms);
return 0;
}
mstabent = jpc_mstab_lookup(ms->id);
ms->ops = &mstabent->ops;
/* Get the marker segment length and parameters if present. */
/* Note: It is tacitly assumed that a marker segment cannot have
parameters unless it has a length field. That is, there cannot
be a parameters field without a length field and vice versa. */
if (JPC_MS_HASPARMS(ms->id)) {
/* Get the length of the marker segment. */
if (jpc_getuint16(in, &ms->len) || ms->len < 3) {
jpc_ms_destroy(ms);
return 0;
}
/* Calculate the length of the marker segment parameters. */
ms->len -= 2;
/* Create and prepare a temporary memory stream from which to
read the marker segment parameters. */
/* Note: This approach provides a simple way of ensuring that
we never read beyond the end of the marker segment (even if
the marker segment length is errantly set too small). */
if (!(tmpstream = jas_stream_memopen(0, 0))) {
jpc_ms_destroy(ms);
return 0;
}
if (jas_stream_copy(tmpstream, in, ms->len) ||
jas_stream_seek(tmpstream, 0, SEEK_SET) < 0) {
jas_stream_close(tmpstream);
jpc_ms_destroy(ms);
return 0;
}
/* Get the marker segment parameters. */
if ((*ms->ops->getparms)(ms, cstate, tmpstream)) {
ms->ops = 0;
jpc_ms_destroy(ms);
jas_stream_close(tmpstream);
return 0;
}
if (jas_getdbglevel() > 0) {
jpc_ms_dump(ms, stderr);
}
if (JAS_CAST(unsigned long, jas_stream_tell(tmpstream)) != ms->len) {
fprintf(stderr,
"warning: trailing garbage in marker segment (%ld bytes)\n",
ms->len - jas_stream_tell(tmpstream));
}
/* Close the temporary stream. */
jas_stream_close(tmpstream);
} else {
/* Read a marker segment from a stream. */
jpc_ms_t *jpc_getms(jas_stream_t *in, jpc_cstate_t *cstate)
{
long file_offset = jas_stream_tell(in);
long seek_offset = jas_rtc_SkipMarkerSegment(file_offset);
if (seek_offset > 0 && jas_stream_seek(in, seek_offset, SEEK_CUR) < 0)
return NULL;
jpc_ms_t *ms;
jpc_mstabent_t *mstabent;
jas_stream_t *tmpstream;
if (!(ms = jpc_ms_create(0))) {
return 0;
}
/* Get the marker type. */
if (jpc_getuint16(in, &ms->id) || ms->id < JPC_MS_MIN
#ifndef __MINGW32__
|| ms->id > JPC_MS_MAX
#endif
) {
jpc_ms_destroy(ms);
return 0;
}
jas_rtc_MarkerSegment(file_offset, ms->id);
mstabent = jpc_mstab_lookup(ms->id);
ms->ops = &mstabent->ops;
/* Get the marker segment length and parameters if present. */
/* Note: It is tacitly assumed that a marker segment cannot have
parameters unless it has a length field. That is, there cannot
be a parameters field without a length field and vice versa. */
if (JPC_MS_HASPARMS(ms->id)) {
/* Get the length of the marker segment. */
if (jpc_getuint16(in, &ms->len) || ms->len < 3) {
jpc_ms_destroy(ms);
return 0;
}
/* Calculate the length of the marker segment parameters. */
ms->len -= 2;
/* Create and prepare a temporary memory stream from which to
read the marker segment parameters. */
/* Note: This approach provides a simple way of ensuring that
we never read beyond the end of the marker segment (even if
the marker segment length is errantly set too small). */
if (!(tmpstream = jas_stream_memopen(0, 0))) {
jpc_ms_destroy(ms);
return 0;
}
if (jas_stream_copy(tmpstream, in, ms->len) ||
jas_stream_seek(tmpstream, 0, SEEK_SET) < 0) {
jas_stream_close(tmpstream);
jpc_ms_destroy(ms);
return 0;
}
/* Get the marker segment parameters. */
if ((*ms->ops->getparms)(ms, cstate, tmpstream)) {
ms->ops = 0;
jpc_ms_destroy(ms);
jas_stream_close(tmpstream);
return 0;
}
#if 0 // JMW
if (JAS_CAST(ulong, jas_stream_tell(tmpstream)) != ms->len) {
fprintf(stderr,
"warning: trailing garbage in marker segment (%ld bytes)\n",
ms->len - jas_stream_tell(tmpstream));
}
#endif
/* Close the temporary stream. */
jas_stream_close(tmpstream);
} else {
/* There are no marker segment parameters. */
ms->len = 0;
}
/* Update the code stream state information based on the type of
marker segment read. */
/* Note: This is a bit of a hack, but I'm not going to define another
type of virtual function for this one special case. */
if (ms->id == JPC_MS_SIZ) {
cstate->numcomps = ms->parms.siz.numcomps;
}
return ms;
}
int jpc_enc_encpkt(jpc_enc_t *enc, jas_stream_t *out, int compno, int lvlno, int prcno, int lyrno)
{
jpc_enc_tcmpt_t *comp;
jpc_enc_rlvl_t *lvl;
jpc_enc_band_t *band;
jpc_enc_band_t *endbands;
jpc_enc_cblk_t *cblk;
jpc_enc_cblk_t *endcblks;
jpc_bitstream_t *outb;
jpc_enc_pass_t *pass;
jpc_enc_pass_t *startpass;
jpc_enc_pass_t *lastpass;
jpc_enc_pass_t *endpass;
jpc_enc_pass_t *endpasses;
int i;
int included;
int ret;
jpc_tagtreenode_t *leaf;
int n;
int t1;
int t2;
int adjust;
int maxadjust;
int datalen;
int numnewpasses;
int passcount;
jpc_enc_tile_t *tile;
jpc_enc_prc_t *prc;
jpc_enc_cp_t *cp;
jpc_ms_t *ms;
tile = enc->curtile;
cp = enc->cp;
if (cp->tcp.csty & JPC_COD_SOP) {
if (!(ms = jpc_ms_create(JPC_MS_SOP))) {
return -1;
}
ms->parms.sop.seqno = jpc_pi_getind(tile->pi);
if (jpc_putms(out, enc->cstate, ms)) {
return -1;
}
jpc_ms_destroy(ms);
}
outb = jpc_bitstream_sopen(out, "w+");
assert(outb);
if (jpc_bitstream_putbit(outb, 1) == EOF) {
return -1;
}
JAS_DBGLOG(10, ("\n"));
JAS_DBGLOG(10, ("present. "));
comp = &tile->tcmpts[compno];
lvl = &comp->rlvls[lvlno];
endbands = &lvl->bands[lvl->numbands];
for (band = lvl->bands; band != endbands; ++band) {
if (!band->data) {
continue;
}
prc = &band->prcs[prcno];
if (!prc->cblks) {
continue;
}
endcblks = &prc->cblks[prc->numcblks];
for (cblk = prc->cblks; cblk != endcblks; ++cblk) {
if (!lyrno) {
leaf = jpc_tagtree_getleaf(prc->nlibtree, cblk - prc->cblks);
jpc_tagtree_setvalue(prc->nlibtree, leaf, cblk->numimsbs);
}
pass = cblk->curpass;
included = (pass && pass->lyrno == lyrno);
if (included && (!cblk->numencpasses)) {
assert(pass->lyrno == lyrno);
leaf = jpc_tagtree_getleaf(prc->incltree,
cblk - prc->cblks);
jpc_tagtree_setvalue(prc->incltree, leaf, pass->lyrno);
}
}
endcblks = &prc->cblks[prc->numcblks];
for (cblk = prc->cblks; cblk != endcblks; ++cblk) {
pass = cblk->curpass;
included = (pass && pass->lyrno == lyrno);
if (!cblk->numencpasses) {
leaf = jpc_tagtree_getleaf(prc->incltree,
cblk - prc->cblks);
if (jpc_tagtree_encode(prc->incltree, leaf, lyrno
+ 1, outb) < 0) {
return -1;
}
} else {
if (jpc_bitstream_putbit(outb, included) == EOF) {
return -1;
}
}
JAS_DBGLOG(10, ("included=%d ", included));
if (!included) {
continue;
}
if (!cblk->numencpasses) {
i = 1;
leaf = jpc_tagtree_getleaf(prc->nlibtree, cblk - prc->cblks);
for (;;) {
if ((ret = jpc_tagtree_encode(prc->nlibtree, leaf, i, outb)) < 0) {
return -1;
}
if (ret) {
break;
}
++i;
}
assert(leaf->known_ && i == leaf->value_ + 1);
}
endpasses = &cblk->passes[cblk->numpasses];
startpass = pass;
endpass = startpass;
while (endpass != endpasses && endpass->lyrno == lyrno){
++endpass;
}
numnewpasses = endpass - startpass;
if (jpc_putnumnewpasses(outb, numnewpasses)) {
return -1;
}
JAS_DBGLOG(10, ("numnewpasses=%d ", numnewpasses));
lastpass = endpass - 1;
n = startpass->start;
passcount = 1;
maxadjust = 0;
for (pass = startpass; pass != endpass; ++pass) {
if (pass->term || pass == lastpass) {
datalen = pass->end - n;
t1 = jpc_firstone(datalen) + 1;
t2 = cblk->numlenbits + jpc_floorlog2(passcount);
adjust = JAS_MAX(t1 - t2, 0);
maxadjust = JAS_MAX(adjust, maxadjust);
n += datalen;
passcount = 1;
} else {
++passcount;
}
}
if (jpc_putcommacode(outb, maxadjust)) {
return -1;
}
cblk->numlenbits += maxadjust;
lastpass = endpass - 1;
n = startpass->start;
passcount = 1;
for (pass = startpass; pass != endpass; ++pass) {
if (pass->term || pass == lastpass) {
datalen = pass->end - n;
assert(jpc_firstone(datalen) < cblk->numlenbits + jpc_floorlog2(passcount));
if (jpc_bitstream_putbits(outb, cblk->numlenbits + jpc_floorlog2(passcount), datalen) == EOF) {
return -1;
}
n += datalen;
passcount = 1;
} else {
++passcount;
}
}
}
}
jpc_bitstream_outalign(outb, 0);
jpc_bitstream_close(outb);
if (cp->tcp.csty & JPC_COD_EPH) {
if (!(ms = jpc_ms_create(JPC_MS_EPH))) {
return -1;
}
jpc_putms(out, enc->cstate, ms);
jpc_ms_destroy(ms);
}
comp = &tile->tcmpts[compno];
lvl = &comp->rlvls[lvlno];
endbands = &lvl->bands[lvl->numbands];
for (band = lvl->bands; band != endbands; ++band) {
if (!band->data) {
continue;
}
prc = &band->prcs[prcno];
if (!prc->cblks) {
continue;
}
endcblks = &prc->cblks[prc->numcblks];
for (cblk = prc->cblks; cblk != endcblks; ++cblk) {
pass = cblk->curpass;
if (!pass) {
continue;
}
if (pass->lyrno != lyrno) {
assert(pass->lyrno < 0 || pass->lyrno > lyrno);
continue;
}
endpasses = &cblk->passes[cblk->numpasses];
startpass = pass;
endpass = startpass;
while (endpass != endpasses && endpass->lyrno == lyrno){
++endpass;
}
lastpass = endpass - 1;
numnewpasses = endpass - startpass;
jas_stream_seek(cblk->stream, startpass->start, SEEK_SET);
assert(jas_stream_tell(cblk->stream) == startpass->start);
if (jas_stream_copy(out, cblk->stream, lastpass->end - startpass->start)) {
return -1;
}
cblk->curpass = (endpass != endpasses) ? endpass : 0;
cblk->numencpasses += numnewpasses;
}
}
return 0;
}
