/* * 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 1 Decoder * * $Id$ */ /******************************************************************************\* Includes.\******************************************************************************/ #include "jpc_t1dec.h"#include "jpc_bs.h"#include "jpc_mqdec.h"#include "jpc_t1cod.h"#include "jpc_dec.h" #include "jasper/jas_thread.h"#include "jasper/jas_stream.h"#include "jasper/jas_math.h"#include "jasper/jas_debug.h" /******************************************************************************\*\******************************************************************************/ static int jpc_dec_decodecblk(jpc_dec_tile_t *tile, jpc_dec_tcomp_t *tcomp, jpc_dec_band_t *band,  jpc_dec_cblk_t *cblk, int dopartial, int maxlyrs);static int dec_sigpass(jpc_mqdec_t *mqdec, unsigned bitpos, enum jpc_tsfb_orient orient,  bool vcausalflag, jas_matrix_t *flags, jas_matrix_t *data);static int dec_rawsigpass(jpc_bitstream_t *in, unsigned bitpos,  bool vcausalflag, jas_matrix_t *flags, jas_matrix_t *data);static int dec_refpass(jpc_mqdec_t *mqdec, unsigned bitpos,  jas_matrix_t *flags, jas_matrix_t *data);static int dec_rawrefpass(jpc_bitstream_t *in, unsigned bitpos,  jas_matrix_t *flags, jas_matrix_t *data);static int dec_clnpass(jpc_mqdec_t *mqdec, unsigned bitpos, enum jpc_tsfb_orient orient,  bool vcausalflag, bool segsymflag, jas_matrix_t *flags, jas_matrix_t *data); #if defined(JAS_ENABLE_NON_THREAD_SAFE_DEBUGGING)static size_t t1dec_cnt = 0;#endif JAS_FORCE_INLINEstatic bool JPC_T1D_GETBIT(jpc_mqdec_t *mqdec, const char *passtypename, const char *symtypename){	bool v = jpc_mqdec_getbit(mqdec);#if defined(JAS_ENABLE_NON_THREAD_SAFE_DEBUGGING)	if (jas_get_debug_level() >= 100) {		jas_logdebugf(100, "index = %zu; passtype = %s; symtype = %s; sym = %d\n",		  t1dec_cnt, passtypename, symtypename, v);		++t1dec_cnt;	}#else	JAS_UNUSED(passtypename);	JAS_UNUSED(symtypename);#endif	return v;} JAS_FORCE_INLINEstatic bool JPC_T1D_GETBITNOSKEW(jpc_mqdec_t *mqdec, const char *passtypename, const char *symtypename){	return JPC_T1D_GETBIT(mqdec, passtypename, symtypename);} JAS_FORCE_INLINEstatic int JPC_T1D_RAWGETBIT(jpc_bitstream_t *bitstream, const char *passtypename, const char *symtypename){	int v = jpc_bitstream_getbit(bitstream);#if defined(JAS_ENABLE_NON_THREAD_SAFE_DEBUGGING)	if (jas_get_debug_level() >= 100) {		jas_logdebugf(100, "index = %ld; passtype = %s; symtype = %s; sym = %d\n", t1dec_cnt, passtypename, symtypename, v);		++t1dec_cnt;	}#else	JAS_UNUSED(passtypename);	JAS_UNUSED(symtypename);#endif	return v;} /******************************************************************************\* Code.\******************************************************************************/ int jpc_dec_decodecblks(jpc_dec_t *dec, jpc_dec_tile_t *tile){	jpc_dec_tcomp_t *tcomp;	jpc_dec_rlvl_t *rlvl;	jpc_dec_band_t *band;	jpc_dec_prc_t *prc;	jpc_dec_cblk_t *cblk; 	unsigned compcnt;	for (compcnt = dec->numcomps, tcomp = tile->tcomps; compcnt > 0;	  --compcnt, ++tcomp) {		unsigned rlvlcnt;		for (rlvlcnt = tcomp->numrlvls, rlvl = tcomp->rlvls;		  rlvlcnt > 0; --rlvlcnt, ++rlvl) {			if (!rlvl->bands) {				continue;			}			unsigned bandcnt;			for (bandcnt = rlvl->numbands, band = rlvl->bands;			  bandcnt > 0; --bandcnt, ++band) {				if (!band->data) {					continue;				}				unsigned prccnt;				for (prccnt = rlvl->numprcs, prc = band->prcs;				  prccnt > 0; --prccnt, ++prc) {					if (!prc->cblks) {						continue;					}					unsigned cblkcnt;					for (cblkcnt = prc->numcblks,					  cblk = prc->cblks; cblkcnt > 0;					  --cblkcnt, ++cblk) {						if (jpc_dec_decodecblk(tile, tcomp,						  band, cblk, 1, JPC_MAXLYRS)) {							return -1;						}					}				} 			}		}	} 	return 0;} static int jpc_dec_decodecblk(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 bpno;	int ret = -1;	int filldata;	int fillmask; 	const size_t compno = tcomp - tile->tcomps;	const jpc_dec_ccp_t *const ccp = &tile->cp->ccps[compno]; 	/* The MQ decoder. */	jpc_mqdec_t *mqdec = NULL; 	/* The raw bit stream decoder. */	jpc_bitstream_t *nulldec = NULL; 	/* The per-sample state information for this code block. */	/* Note: matrix is assumed to be zeroed */	jas_matrix_t *const flags = jas_matrix_create(jas_matrix_numrows(cblk->data) + 2, jas_matrix_numcols(cblk->data) + 2);	if (!flags)		goto error; 	seg = cblk->segs.head;	while (seg && (seg != cblk->curseg || dopartial) && (maxlyrs < 0 ||	  seg->lyrno < (unsigned)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 (!mqdec) {				if (!(mqdec = jpc_mqdec_create(JPC_NUMCTXS, 0))) {					goto error;				}				jpc_mqdec_setctxs(mqdec, JPC_NUMCTXS, jpc_mqctxs);			}			jpc_mqdec_setinput(mqdec, seg->stream);			jpc_mqdec_init(mqdec);		} else {			assert(seg->type == JPC_SEG_RAW);			if (!nulldec) {				if (!(nulldec = jpc_bitstream_sopen(seg->stream, "r"))) {					goto error;				}			}		}  		for (unsigned i = 0; i < seg->numpasses; ++i) {			if (cblk->numimsbs > band->numbps) {				if (ccp->roishift <= 0) {					jas_logwarnf("warning: corrupt code stream\n");				} else {					if (cblk->numimsbs < ccp->roishift - band->numbps) {						jas_logwarnf("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;}			enum jpc_passtype passtype = JPC_PASSTYPE(seg->passno + i);			assert(bpno >= 0 && bpno < 31);			switch (passtype) {			case JPC_SIGPASS:				ret = (seg->type == JPC_SEG_MQ) ? dec_sigpass(mqdec, bpno, band->orient,				  (ccp->cblkctx & JPC_COX_VSC) != 0,				  flags, cblk->data) :				  dec_rawsigpass(nulldec, bpno,				  (ccp->cblkctx & JPC_COX_VSC) != 0,				  flags, cblk->data);				break;			case JPC_REFPASS:				ret = (seg->type == JPC_SEG_MQ) ?				  dec_refpass(mqdec, bpno,				  flags, cblk->data) :				  dec_rawrefpass(nulldec, bpno,				  flags, cblk->data);				break;			case JPC_CLNPASS:				assert(seg->type == JPC_SEG_MQ);				ret = dec_clnpass(mqdec, bpno,				  band->orient, (ccp->cblkctx &				  JPC_COX_VSC) != 0, (ccp->cblkctx &				  JPC_COX_SEGSYM) != 0, flags,				  cblk->data);				break;			default:				assert(false);				JAS_UNREACHABLE();			}			/* Do we need to reset after each coding pass? */			if ((ccp->cblkctx & JPC_COX_RESET) && mqdec) {				jpc_mqdec_setctxs(mqdec, JPC_NUMCTXS, jpc_mqctxs);			} 			if (ret) {				jas_logerrorf("coding pass failed passtype=%d segtype=%d\n", passtype, seg->type);				goto error;			} 		} 		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 (ccp->cblkctx & JPC_COX_PTERM) {				fillmask = 0x7f;				filldata = 0x2a;			} else {				fillmask = 0;				filldata = 0;			}			if ((ret = jpc_bitstream_inalign(nulldec, fillmask,			  filldata)) < 0) {				goto error;			} else if (ret > 0) {				jas_logwarnf("warning: bad termination pattern detected\n");			}			jpc_bitstream_close(nulldec);			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:	if (mqdec)		jpc_mqdec_destroy(mqdec);	if (nulldec)		jpc_bitstream_close(nulldec);	if (flags)		jas_matrix_destroy(flags);	return 0; error:	if (mqdec)		jpc_mqdec_destroy(mqdec);	if (nulldec)		jpc_bitstream_close(nulldec);	if (flags)		jas_matrix_destroy(flags);	return -1;} /******************************************************************************\* Code for significance pass.\******************************************************************************/ JAS_FORCE_INLINEstatic void jpc_sigpass_step(jpc_fix_t *fp, size_t frowstep, jpc_fix_t *dp, jpc_fix_t oneplushalf, enum jpc_tsfb_orient orient, jpc_mqdec_t *mqdec, bool vcausalflag){	const jpc_fix_t f = *(fp);	if ((f & JPC_OTHSIGMSK) && !(f & (JPC_SIG | JPC_VISIT))) {		jpc_mqdec_setcurctx(mqdec, JPC_GETZCCTXNO(f, orient)); 		if (JPC_T1D_GETBIT(mqdec, "SIG", "ZC")) {			jpc_mqdec_setcurctx(mqdec, JPC_GETSCCTXNO(f));			bool v = JPC_T1D_GETBIT(mqdec, "SIG", "SC");			v ^= JPC_GETSPB(f);			JPC_UPDATEFLAGS4(fp, frowstep, v, vcausalflag);			*fp |= JPC_SIG;			*dp = v ? -oneplushalf : oneplushalf;		}		*fp |= JPC_VISIT;	}} static int dec_sigpass(jpc_mqdec_t *mqdec, unsigned bitpos, enum jpc_tsfb_orient orient,  bool vcausalflag, jas_matrix_t *flags, jas_matrix_t *data){	int i;	jpc_fix_t *fp;	jpc_fix_t *fstripestart;	jpc_fix_t *fvscanstart;	jpc_fix_t *dp;	jpc_fix_t *dstripestart;	jpc_fix_t *dvscanstart; 	const unsigned width = jas_matrix_numcols(data);	const unsigned height = jas_matrix_numrows(data);	const unsigned frowstep = jas_matrix_rowstep(flags);	const unsigned drowstep = jas_matrix_rowstep(data);	const unsigned fstripestep = frowstep << 2;	const unsigned dstripestep = drowstep << 2; 	const jpc_fix_t one = (jpc_fix_t)1 << bitpos;	const jpc_fix_t half = one >> 1;	const jpc_fix_t oneplushalf = one | half; 	fstripestart = jas_matrix_getref(flags, 1, 1);	dstripestart = jas_matrix_getref(data, 0, 0);	for (i = height; i > 0; i -= 4, fstripestart += fstripestep,	  dstripestart += dstripestep) {		fvscanstart = fstripestart;		dvscanstart = dstripestart;		const unsigned vscanlen = JAS_MIN(i, 4);		for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {			fp = fvscanstart;			dp = dvscanstart;			unsigned k = vscanlen; 			/* Process first sample in vertical scan. */			jpc_sigpass_step(fp, frowstep, dp, oneplushalf,			  orient, mqdec, vcausalflag);			if (--k <= 0) {				continue;			}			fp += frowstep;			dp += drowstep; 			/* Process second sample in vertical scan. */			jpc_sigpass_step(fp, frowstep, dp, oneplushalf,			  orient, mqdec, 0);			if (--k <= 0) {				continue;			}			fp += frowstep;			dp += drowstep; 			/* Process third sample in vertical scan. */			jpc_sigpass_step(fp, frowstep, dp, oneplushalf,			  orient, mqdec, 0);			if (--k <= 0) {				continue;			}			fp += frowstep;			dp += drowstep; 			/* Process fourth sample in vertical scan. */			jpc_sigpass_step(fp, frowstep, dp, oneplushalf,			  orient, mqdec, 0);		}	}	return 0;} JAS_FORCE_INLINEstatic int jpc_rawsigpass_step(jpc_fix_t *fp, size_t frowstep, jpc_fix_t *dp, jpc_fix_t oneplushalf, jpc_bitstream_t *in, bool vcausalflag){	const jpc_fix_t f = *fp;	if ((f & JPC_OTHSIGMSK) && !(f & (JPC_SIG | JPC_VISIT))) {		int v = JPC_T1D_RAWGETBIT(in, "SIG", "ZC");		if (v < 0) {			return -1;		}		if (v) {			v = JPC_T1D_RAWGETBIT(in, "SIG", "SC");			if (v < 0) {				return -1;			}			JPC_UPDATEFLAGS4(fp, frowstep, v, vcausalflag);			*fp |= JPC_SIG;			*dp = v ? -oneplushalf : oneplushalf;		}		*fp |= JPC_VISIT;	} 	return 0;} static int dec_rawsigpass(jpc_bitstream_t *in, unsigned bitpos, bool vcausalflag,  jas_matrix_t *flags, jas_matrix_t *data){	int i;	jpc_fix_t *fp;	jpc_fix_t *fstripestart;	jpc_fix_t *fvscanstart;	jpc_fix_t *dp;	jpc_fix_t *dstripestart;	jpc_fix_t *dvscanstart; 	const unsigned width = jas_matrix_numcols(data);	const unsigned height = jas_matrix_numrows(data);	const unsigned frowstep = jas_matrix_rowstep(flags);	const unsigned drowstep = jas_matrix_rowstep(data);	const unsigned fstripestep = frowstep << 2;	const unsigned dstripestep = drowstep << 2; 	const jpc_fix_t one = (jpc_fix_t)1 << bitpos;	const jpc_fix_t half = one >> 1;	const jpc_fix_t oneplushalf = one | half; 	fstripestart = jas_matrix_getref(flags, 1, 1);	dstripestart = jas_matrix_getref(data, 0, 0);	for (i = height; i > 0; i -= 4, fstripestart += fstripestep,	  dstripestart += dstripestep) {		fvscanstart = fstripestart;		dvscanstart = dstripestart;		const unsigned vscanlen = JAS_MIN(i, 4);		for (unsigned j = width; j > 0; --j, ++fvscanstart, ++dvscanstart) {			fp = fvscanstart;			dp = dvscanstart;			unsigned k = vscanlen; 

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