jpc_mqenc_t *jpc_mqenc_create(int maxctxs, jas_stream_t *out)
{
jpc_mqenc_t *mqenc;
/* Allocate memory for the MQ encoder. */
if (!(mqenc = jas_malloc(sizeof(jpc_mqenc_t)))) {
goto error;
}
mqenc->out = out;
mqenc->maxctxs = maxctxs;
/* Allocate memory for the per-context state information. */
if (!(mqenc->ctxs = jas_malloc(mqenc->maxctxs * sizeof(jpc_mqstate_t *)))) {
goto error;
}
/* Set the current context to the first one. */
mqenc->curctx = mqenc->ctxs;
jpc_mqenc_init(mqenc);
/* Initialize the per-context state information to something sane. */
jpc_mqenc_setctxs(mqenc, 0, 0);
return mqenc;
error:
if (mqenc) {
jpc_mqenc_destroy(mqenc);
}
return 0;
}
/* Encode a single code block. */
int jpc_enc_enccblk(jpc_enc_t *enc, jas_stream_t *out, jpc_enc_tcmpt_t *tcmpt, jpc_enc_band_t *band, jpc_enc_cblk_t *cblk)
{
jpc_enc_pass_t *pass;
jpc_enc_pass_t *endpasses;
int bitpos;
int n;
int adjust;
int ret;
int passtype;
int t;
jpc_bitstream_t *bout;
jpc_enc_pass_t *termpass;
jpc_enc_rlvl_t *rlvl;
int vcausal;
int segsym;
int termmode;
int c;
bout = 0;
rlvl = band->rlvl;
cblk->stream = jas_stream_memopen(0, 0);
assert(cblk->stream);
cblk->mqenc = jpc_mqenc_create(JPC_NUMCTXS, cblk->stream);
assert(cblk->mqenc);
jpc_mqenc_setctxs(cblk->mqenc, JPC_NUMCTXS, jpc_mqctxs);
cblk->numpasses = (cblk->numbps > 0) ? (3 * cblk->numbps - 2) : 0;
if (cblk->numpasses > 0) {
cblk->passes = jas_malloc(cblk->numpasses * sizeof(jpc_enc_pass_t));
assert(cblk->passes);
} else {
cblk->passes = 0;
}
endpasses = &cblk->passes[cblk->numpasses];
for (pass = cblk->passes; pass != endpasses; ++pass) {
pass->start = 0;
pass->end = 0;
pass->term = JPC_ISTERMINATED(pass - cblk->passes, 0, cblk->numpasses, (tcmpt->cblksty & JPC_COX_TERMALL) != 0, (tcmpt->cblksty & JPC_COX_LAZY) != 0);
pass->type = JPC_SEGTYPE(pass - cblk->passes, 0, (tcmpt->cblksty & JPC_COX_LAZY) != 0);
pass->lyrno = -1;
if (pass == endpasses - 1) {
assert(pass->term == 1);
pass->term = 1;
}
}
cblk->flags = jas_matrix_create(jas_matrix_numrows(cblk->data) + 2,
jas_matrix_numcols(cblk->data) + 2);
assert(cblk->flags);
bitpos = cblk->numbps - 1;
pass = cblk->passes;
n = cblk->numpasses;
while (--n >= 0) {
if (pass->type == JPC_SEG_MQ) {
/* NOP */
} else {
assert(pass->type == JPC_SEG_RAW);
if (!bout) {
bout = jpc_bitstream_sopen(cblk->stream, "w");
assert(bout);
}
}
#if 1
passtype = (pass - cblk->passes + 2) % 3;
#else
passtype = JPC_PASSTYPE(pass - cblk->passes + 2);
#endif
pass->start = jas_stream_tell(cblk->stream);
#if 0
assert(jas_stream_tell(cblk->stream) == jas_stream_getrwcount(cblk->stream));
#endif
assert(bitpos >= 0);
vcausal = (tcmpt->cblksty & JPC_COX_VSC) != 0;
segsym = (tcmpt->cblksty & JPC_COX_SEGSYM) != 0;
if (pass->term) {
termmode = ((tcmpt->cblksty & JPC_COX_PTERM) ?
JPC_MQENC_PTERM : JPC_MQENC_DEFTERM) + 1;
} else {
termmode = 0;
}
switch (passtype) {
case JPC_SIGPASS:
ret = (pass->type == JPC_SEG_MQ) ? jpc_encsigpass(cblk->mqenc,
bitpos, band->orient, vcausal, cblk->flags,
cblk->data, termmode, &pass->nmsedec) :
jpc_encrawsigpass(bout, bitpos, vcausal, cblk->flags,
cblk->data, termmode, &pass->nmsedec);
break;
case JPC_REFPASS:
ret = (pass->type == JPC_SEG_MQ) ? jpc_encrefpass(cblk->mqenc,
bitpos, vcausal, cblk->flags, cblk->data, termmode,
&pass->nmsedec) : jpc_encrawrefpass(bout, bitpos,
vcausal, cblk->flags, cblk->data, termmode,
&pass->nmsedec);
break;
case JPC_CLNPASS:
assert(pass->type == JPC_SEG_MQ);
ret = jpc_encclnpass(cblk->mqenc, bitpos, band->orient,
vcausal, segsym, cblk->flags, cblk->data, termmode,
&pass->nmsedec);
break;
default:
assert(0);
break;
}
if (pass->type == JPC_SEG_MQ) {
if (pass->term) {
jpc_mqenc_init(cblk->mqenc);
}
jpc_mqenc_getstate(cblk->mqenc, &pass->mqencstate);
pass->end = jas_stream_tell(cblk->stream);
if (tcmpt->cblksty & JPC_COX_RESET) {
jpc_mqenc_setctxs(cblk->mqenc, JPC_NUMCTXS, jpc_mqctxs);
}
} else {
if (pass->term) {
if (jpc_bitstream_pending(bout)) {
jpc_bitstream_outalign(bout, 0x2a);
}
jpc_bitstream_close(bout);
bout = 0;
pass->end = jas_stream_tell(cblk->stream);
} else {
pass->end = jas_stream_tell(cblk->stream) +
jpc_bitstream_pending(bout);
/* NOTE - This will not work. need to adjust by # of pending output bytes */
}
}
#if 0
/* XXX - This assertion fails sometimes when various coding modes are used.
This seems to be harmless, but why does it happen at all? */
assert(jas_stream_tell(cblk->stream) == jas_stream_getrwcount(cblk->stream));
#endif
pass->wmsedec = jpc_fixtodbl(band->rlvl->tcmpt->synweight) *
jpc_fixtodbl(band->rlvl->tcmpt->synweight) *
jpc_fixtodbl(band->synweight) *
jpc_fixtodbl(band->synweight) *
jpc_fixtodbl(band->absstepsize) * jpc_fixtodbl(band->absstepsize) *
((double) (1 << bitpos)) * ((double)(1 << bitpos)) *
jpc_fixtodbl(pass->nmsedec);
pass->cumwmsedec = pass->wmsedec;
if (pass != cblk->passes) {
pass->cumwmsedec += pass[-1].cumwmsedec;
}
if (passtype == JPC_CLNPASS) {
--bitpos;
}
++pass;
}
#if 0
dump_passes(cblk->passes, cblk->numpasses, cblk);
#endif
n = 0;
endpasses = &cblk->passes[cblk->numpasses];
for (pass = cblk->passes; pass != endpasses; ++pass) {
if (pass->start < n) {
pass->start = n;
}
if (pass->end < n) {
pass->end = n;
}
if (!pass->term) {
termpass = pass;
while (termpass - pass < cblk->numpasses &&
!termpass->term) {
++termpass;
}
if (pass->type == JPC_SEG_MQ) {
t = (pass->mqencstate.lastbyte == 0xff) ? 1 : 0;
if (pass->mqencstate.ctreg >= 5) {
adjust = 4 + t;
} else {
adjust = 5 + t;
}
pass->end += adjust;
}
if (pass->end > termpass->end) {
pass->end = termpass->end;
}
if ((c = getthebyte(cblk->stream, pass->end - 1)) == EOF) {
abort();
}
if (c == 0xff) {
++pass->end;
}
n = JAS_MAX(n, pass->end);
} else {
n = JAS_MAX(n, pass->end);
}
}
#if 0
dump_passes(cblk->passes, cblk->numpasses, cblk);
#endif
if (bout) {
jpc_bitstream_close(bout);
}
return 0;
}
