Example #1
0
int JPC_SEGPASSCNT(int passno, int firstpassno, int numpasses, int bypass, int termall)
{
	int ret;
	int passtype;

	if (termall) {
		ret = 1;
	} else if (bypass) {
		if (passno < firstpassno + 10) {
			ret = 10 - (passno - firstpassno);
		} else {
			passtype = JPC_PASSTYPE(passno);
			switch (passtype) {
			case JPC_SIGPASS:
				ret = 2;
				break;
			case JPC_REFPASS:
				ret = 1;
				break;
			case JPC_CLNPASS:
				ret = 1;
				break;
			default:
				ret = -1;
				assert(0);
				break;
			}
		}
	} else {
		ret = JPC_PREC * 3 - 2;
	}
	ret = JAS_MIN(ret, numpasses - passno);
	return ret;
}
Example #2
0
int JPC_SEGTYPE(int passno, int firstpassno, int bypass)
{
	int passtype;
	if (bypass) {
		passtype = JPC_PASSTYPE(passno);
		if (passtype == JPC_CLNPASS) {
			return JPC_SEG_MQ;
		}
		return ((passno < firstpassno + 10) ? JPC_SEG_MQ : JPC_SEG_RAW);
	} else {
		return JPC_SEG_MQ;
	}
}
/* 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;
}
Example #4
0
static int jpc_dec_decodecblk(jpc_dec_t *dec, 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 i;
	int bpno;
	int passtype;
	int ret;
	int compno;
	int filldata;
	int fillmask;
	jpc_dec_ccp_t *ccp;

	compno = tcomp - tile->tcomps;

	if (!cblk->flags) {
		/* Note: matrix is assumed to be zeroed */
		if (!(cblk->flags = jas_matrix_create(jas_matrix_numrows(cblk->data) +
		  2, jas_matrix_numcols(cblk->data) + 2))) {
			return -1;
		}
	}

	seg = cblk->segs.head;
	while (seg && (seg != cblk->curseg || dopartial) && (maxlyrs < 0 ||
	  seg->lyrno < 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 (!cblk->mqdec) {
				if (!(cblk->mqdec = jpc_mqdec_create(JPC_NUMCTXS, 0))) {
					return -1;
				}
				jpc_mqdec_setctxs(cblk->mqdec, JPC_NUMCTXS, jpc_mqctxs);
			}
			jpc_mqdec_setinput(cblk->mqdec, seg->stream);
			jpc_mqdec_init(cblk->mqdec);
		} else {
			assert(seg->type == JPC_SEG_RAW);
			if (!cblk->nulldec) {
				if (!(cblk->nulldec = jpc_bitstream_sopen(seg->stream, "r"))) {
					assert(0);
				}
			}
		}


		for (i = 0; i < seg->numpasses; ++i) {
			if (cblk->numimsbs > band->numbps) {
				ccp = &tile->cp->ccps[compno];
				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;
}
#if 1
			passtype = (seg->passno + i + 2) % 3;
#else
			passtype = JPC_PASSTYPE(seg->passno + i + 2);
#endif
			assert(bpno >= 0 && bpno < 31);
			switch (passtype) {
			case JPC_SIGPASS:
				ret = (seg->type == JPC_SEG_MQ) ? dec_sigpass(dec,
				  cblk->mqdec, bpno, band->orient,
				  (tile->cp->ccps[compno].cblkctx & JPC_COX_VSC) != 0,
				  cblk->flags, cblk->data) :
				  dec_rawsigpass(dec, cblk->nulldec, bpno,
				  (tile->cp->ccps[compno].cblkctx & JPC_COX_VSC) != 0,
				  cblk->flags, cblk->data);
				break;
			case JPC_REFPASS:
				ret = (seg->type == JPC_SEG_MQ) ?
				  dec_refpass(dec, cblk->mqdec, bpno,
				  (tile->cp->ccps[compno].cblkctx & JPC_COX_VSC) != 0,
				  cblk->flags, cblk->data) :
				  dec_rawrefpass(dec, cblk->nulldec, bpno,
				  (tile->cp->ccps[compno].cblkctx & JPC_COX_VSC) != 0,
				  cblk->flags, cblk->data);
				break;
			case JPC_CLNPASS:
				assert(seg->type == JPC_SEG_MQ);
				ret = dec_clnpass(dec, cblk->mqdec, bpno,
				  band->orient, (tile->cp->ccps[compno].cblkctx &
				  JPC_COX_VSC) != 0, (tile->cp->ccps[compno].cblkctx &
				  JPC_COX_SEGSYM) != 0, cblk->flags,
				  cblk->data);
				break;
			default:
				ret = -1;
				break;
			}
			/* Do we need to reset after each coding pass? */
			if (tile->cp->ccps[compno].cblkctx & JPC_COX_RESET) {
				jpc_mqdec_setctxs(cblk->mqdec, JPC_NUMCTXS, jpc_mqctxs);
			}

			if (ret) {
				jas_eprintf("coding pass failed passtype=%d segtype=%d\n", passtype, seg->type);
				return -1;
			}

		}

		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 (tile->cp->ccps[compno].cblkctx & JPC_COX_PTERM) {
				fillmask = 0x7f;
				filldata = 0x2a;
			} else {
				fillmask = 0;
				filldata = 0;
			}
			if ((ret = jpc_bitstream_inalign(cblk->nulldec, fillmask,
			  filldata)) < 0) {
				return -1;
			} else if (ret > 0) {
				jas_eprintf("warning: bad termination pattern detected\n");
			}
			jpc_bitstream_close(cblk->nulldec);
			cblk->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:
	return 0;
}