jpc_tsfb.c

在x86平台上运行不可信任代码的sandbox。

/*
 * 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) 1999-2000 Image Power, Inc.
 * Copyright (c) 1999-2000 The University of British Columbia
 * Copyright (c) 2001-2003 Michael David Adams
 * 
 * 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
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 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
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 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
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 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
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 * 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.
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 * __END_OF_JASPER_LICENSE__
 */

/*
 * Tree-Structured Filter Bank (TSFB) Library
 *
 * $Id: jpc_tsfb.c 1918 2005-07-24 14:12:08Z baford $
 */

/******************************************************************************\
* Includes.
\******************************************************************************/

#include <assert.h>

#include "jasper/jas_malloc.h"
#include "jasper/jas_seq.h"

#include "jpc_tsfb.h"
#include "jpc_cod.h"
#include "jpc_cs.h"
#include "jpc_util.h"

/******************************************************************************\
*
\******************************************************************************/

#define	bandnotovind(tsfbnode, x)	((x) / (tsfbnode)->numhchans)
#define	bandnotohind(tsfbnode, x)	((x) % (tsfbnode)->numhchans)

static jpc_tsfb_t *jpc_tsfb_create(void);
static jpc_tsfbnode_t *jpc_tsfbnode_create(void);
static void jpc_tsfbnode_destroy(jpc_tsfbnode_t *node);
static void jpc_tsfbnode_synthesize(jpc_tsfbnode_t *node, int flags, jas_seq2d_t *x);
static void jpc_tsfbnode_analyze(jpc_tsfbnode_t *node, int flags, jas_seq2d_t *x);
static void qmfb2d_getbands(jpc_qmfb1d_t *hqmfb, jpc_qmfb1d_t *vqmfb,
  uint_fast32_t xstart, uint_fast32_t ystart, uint_fast32_t xend,
  uint_fast32_t yend, int maxbands, int *numbandsptr, jpc_tsfbnodeband_t *bands);
static void jpc_tsfbnode_getbandstree(jpc_tsfbnode_t *node, uint_fast32_t posxstart,
  uint_fast32_t posystart, uint_fast32_t xstart, uint_fast32_t ystart,
  uint_fast32_t xend, uint_fast32_t yend, jpc_tsfb_band_t **bands);
static int jpc_tsfbnode_findchild(jpc_tsfbnode_t *parnode, jpc_tsfbnode_t *cldnode);
static int jpc_tsfbnode_getequivfilters(jpc_tsfbnode_t *tsfbnode, int cldind,
  int width, int height, jas_seq_t **vfilter, jas_seq_t **hfilter);

/******************************************************************************\
*
\******************************************************************************/

jpc_tsfb_t *jpc_tsfb_wavelet(jpc_qmfb1d_t *hqmfb, jpc_qmfb1d_t *vqmfb, int numdlvls)
{
	jpc_tsfb_t *tsfb;
	int dlvlno;
	jpc_tsfbnode_t *curnode;
	jpc_tsfbnode_t *prevnode;
	int childno;
	if (!(tsfb = jpc_tsfb_create())) {
		return 0;
	}
	prevnode = 0;
	for (dlvlno = 0; dlvlno < numdlvls; ++dlvlno) {
		if (!(curnode = jpc_tsfbnode_create())) {
			jpc_tsfb_destroy(tsfb);
			return 0;
		}
		if (prevnode) {
			prevnode->children[0] = curnode;
			++prevnode->numchildren;
			curnode->parent = prevnode;
		} else {
			tsfb->root = curnode;
			curnode->parent = 0;
		}
		if (hqmfb) {
			curnode->numhchans = jpc_qmfb1d_getnumchans(hqmfb);
			if (!(curnode->hqmfb = jpc_qmfb1d_copy(hqmfb))) {
				jpc_tsfb_destroy(tsfb);
				return 0;
			}
		} else {
			curnode->hqmfb = 0;
			curnode->numhchans = 1;
		}
		if (vqmfb) {
			curnode->numvchans = jpc_qmfb1d_getnumchans(vqmfb);
			if (!(curnode->vqmfb = jpc_qmfb1d_copy(vqmfb))) {
				jpc_tsfb_destroy(tsfb);
				return 0;
			}
		} else {
			curnode->vqmfb = 0;
			curnode->numvchans = 1;
		}
		curnode->maxchildren = curnode->numhchans * curnode->numvchans;
		for (childno = 0; childno < curnode->maxchildren;
		  ++childno) {
			curnode->children[childno] = 0;
		}
		prevnode = curnode;
	}
	return tsfb;
}

static jpc_tsfb_t *jpc_tsfb_create()
{
	jpc_tsfb_t *tsfb;
	if (!(tsfb = jas_malloc(sizeof(jpc_tsfb_t)))) {
		return 0;
	}
	tsfb->root = 0;
	return tsfb;
}

void jpc_tsfb_destroy(jpc_tsfb_t *tsfb)
{
	if (tsfb->root) {
		jpc_tsfbnode_destroy(tsfb->root);
	}
	jas_free(tsfb);
}

/******************************************************************************\
*
\******************************************************************************/

void jpc_tsfb_analyze(jpc_tsfb_t *tsfb, int flags, jas_seq2d_t *x)
{
	if (tsfb->root) {
		jpc_tsfbnode_analyze(tsfb->root, flags, x);
	}
}

static void jpc_tsfbnode_analyze(jpc_tsfbnode_t *node, int flags, jas_seq2d_t *x)
{
	jpc_tsfbnodeband_t nodebands[JPC_TSFB_MAXBANDSPERNODE];
	int numbands;
	jas_seq2d_t *y;
	int bandno;
	jpc_tsfbnodeband_t *band;

	if (node->vqmfb) {
		jpc_qmfb1d_analyze(node->vqmfb, flags | JPC_QMFB1D_VERT, x);
	}
	if (node->hqmfb) {
		jpc_qmfb1d_analyze(node->hqmfb, flags, x);
	}
	if (node->numchildren > 0) {
		qmfb2d_getbands(node->hqmfb, node->vqmfb, jas_seq2d_xstart(x),
		  jas_seq2d_ystart(x), jas_seq2d_xend(x), jas_seq2d_yend(x),
		  JPC_TSFB_MAXBANDSPERNODE, &numbands, nodebands);
		y = jas_seq2d_create(0, 0, 0, 0);
		assert(y);
		for (bandno = 0, band = nodebands; bandno < numbands; ++bandno, ++band) {
			if (node->children[bandno]) {
				if (band->xstart != band->xend && band->ystart != band->yend) {
					jas_seq2d_bindsub(y, x, band->locxstart, band->locystart,
					  band->locxend, band->locyend);
					jas_seq2d_setshift(y, band->xstart, band->ystart);
					jpc_tsfbnode_analyze(node->children[bandno], flags, y);
				}
			}
		}
		jas_matrix_destroy(y);
	}
}

void jpc_tsfb_synthesize(jpc_tsfb_t *tsfb, int flags, jas_seq2d_t *x)
{
	if (tsfb->root) {
		jpc_tsfbnode_synthesize(tsfb->root, flags, x);
	}
}

static void jpc_tsfbnode_synthesize(jpc_tsfbnode_t *node, int flags, jas_seq2d_t *x)
{
	jpc_tsfbnodeband_t nodebands[JPC_TSFB_MAXBANDSPERNODE];
	int numbands;
	jas_seq2d_t *y;
	int bandno;
	jpc_tsfbnodeband_t *band;

	if (node->numchildren > 0) {
		qmfb2d_getbands(node->hqmfb, node->vqmfb, jas_seq2d_xstart(x),
		  jas_seq2d_ystart(x), jas_seq2d_xend(x), jas_seq2d_yend(x),
		  JPC_TSFB_MAXBANDSPERNODE, &numbands, nodebands);
		y = jas_seq2d_create(0, 0, 0, 0);
		for (bandno = 0, band = nodebands; bandno < numbands; ++bandno, ++band) {
			if (node->children[bandno]) {
				if (band->xstart != band->xend && band->ystart != band->yend) {
					jas_seq2d_bindsub(y, x, band->locxstart, band->locystart,
					  band->locxend, band->locyend);
					jas_seq2d_setshift(y, band->xstart, band->ystart);
					jpc_tsfbnode_synthesize(node->children[bandno], flags, y);
				}
			}
		}
		jas_seq2d_destroy(y);
	}
	if (node->hqmfb) {
		jpc_qmfb1d_synthesize(node->hqmfb, flags, x);
	}
	if (node->vqmfb) {
		jpc_qmfb1d_synthesize(node->vqmfb, flags | JPC_QMFB1D_VERT, x);
	}
}

/******************************************************************************\
*
\******************************************************************************/


int jpc_tsfb_getbands(jpc_tsfb_t *tsfb, uint_fast32_t xstart, uint_fast32_t ystart,
  uint_fast32_t xend, uint_fast32_t yend, jpc_tsfb_band_t *bands)
{
	jpc_tsfb_band_t *savbands;
	savbands = bands;
	if (!tsfb->root) {
		bands[0].xstart = xstart;
		bands[0].ystart = ystart;
		bands[0].xend = xend;
		bands[0].yend = yend;
		bands[0].locxstart = xstart;
		bands[0].locystart = ystart;
		bands[0].locxend = xend;
		bands[0].locyend = yend;
		bands[0].orient = JPC_TSFB_LL;
		bands[0].synenergywt = JPC_FIX_ONE;
		++bands;
	} else {
		jpc_tsfbnode_getbandstree(tsfb->root, xstart, ystart,
		  xstart, ystart, xend, yend, &bands);
	}
	return bands - savbands;
}

static void jpc_tsfbnode_getbandstree(jpc_tsfbnode_t *node, uint_fast32_t posxstart,
  uint_fast32_t posystart, uint_fast32_t xstart, uint_fast32_t ystart,
  uint_fast32_t xend, uint_fast32_t yend, jpc_tsfb_band_t **bands)
{
	jpc_tsfbnodeband_t nodebands[JPC_TSFB_MAXBANDSPERNODE];
	jpc_tsfbnodeband_t *nodeband;
	int nodebandno;
	int numnodebands;
	jpc_tsfb_band_t *band;
	jas_seq_t *hfilter;
	jas_seq_t *vfilter;

	qmfb2d_getbands(node->hqmfb, node->vqmfb, xstart, ystart, xend, yend,