WebSVN - AndroidProjects - Rev 244 - /tools/osframework/source/ImageLib/jpeg2000/jpc

/*
* 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 Software License
*
* IMAGE POWER JPEG-2000 PUBLIC LICENSE
* ************************************
*
* GRANT:
*
* Permission is hereby granted, free of charge, to any person (the "User")
* obtaining a copy of this software and associated documentation, to deal
* in the JasPer Software without restriction, including without limitation
* the right to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the JasPer Software (in source and binary forms),
* and to permit persons to whom the JasPer Software is furnished to do so,
* provided further that the License Conditions below are met.
*
* License Conditions
* ******************
*
* A. Redistributions of source code must retain the above copyright notice,
* and this list of conditions, and the following disclaimer.
*
* B. Redistributions in binary form must reproduce the above copyright
* notice, and this list of conditions, and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* C. Neither the name of Image Power, Inc. nor any other contributor
* (including, but not limited to, the University of British Columbia and
* Michael David Adams) may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* D. User agrees that it shall not commence any action against Image Power,
* Inc., the University of British Columbia, Michael David Adams, or any
* other contributors (collectively "Licensors") for infringement of any
* intellectual property rights ("IPR") held by the User in respect of any
* technology that User owns or has a right to license or sublicense and
* which is an element required in order to claim compliance with ISO/IEC
* 15444-1 (i.e., JPEG-2000 Part 1). "IPR" means all intellectual property
* rights worldwide arising under statutory or common law, and whether
* or not perfected, including, without limitation, all (i) patents and
* patent applications owned or licensable by User; (ii) rights associated
* with works of authorship including copyrights, copyright applications,
* copyright registrations, mask work rights, mask work applications,
* mask work registrations; (iii) rights relating to the protection of
* trade secrets and confidential information; (iv) any right analogous
* to those set forth in subsections (i), (ii), or (iii) and any other
* proprietary rights relating to intangible property (other than trademark,
* trade dress, or service mark rights); and (v) divisions, continuations,
* renewals, reissues and extensions of the foregoing (as and to the extent
* applicable) now existing, hereafter filed, issued or acquired.
*
* E. If User commences an infringement action against any Licensor(s) then
* such Licensor(s) shall have the right to terminate User's license and
* all sublicenses that have been granted hereunder by User to other parties.
*
* F. This software is for use only in hardware or software products that
* are compliant with ISO/IEC 15444-1 (i.e., JPEG-2000 Part 1). No license
* or right to this Software is granted for products that do not comply
* with ISO/IEC 15444-1. The JPEG-2000 Part 1 standard can be purchased
* from the ISO.
*
* THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE.
* NO USE OF THE JASPER SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
* THIS DISCLAIMER. THE JASPER SOFTWARE IS PROVIDED BY THE LICENSORS AND
* CONTRIBUTORS UNDER THIS LICENSE ON AN ``AS-IS'' BASIS, WITHOUT WARRANTY
* OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION,
* WARRANTIES THAT THE JASPER SOFTWARE IS FREE OF DEFECTS, IS MERCHANTABLE,
* IS FIT FOR A PARTICULAR PURPOSE OR IS NON-INFRINGING. THOSE INTENDING
* TO USE THE JASPER SOFTWARE OR MODIFICATIONS THEREOF FOR USE IN HARDWARE
* OR SOFTWARE PRODUCTS ARE ADVISED THAT THEIR USE MAY INFRINGE EXISTING
* PATENTS, COPYRIGHTS, TRADEMARKS, OR OTHER INTELLECTUAL PROPERTY RIGHTS.
* THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE JASPER SOFTWARE
* IS WITH THE USER. SHOULD ANY PART OF THE JASPER SOFTWARE PROVE DEFECTIVE
* IN ANY RESPECT, THE USER (AND NOT THE INITIAL DEVELOPERS, THE UNIVERSITY
* OF BRITISH COLUMBIA, IMAGE POWER, INC., MICHAEL DAVID ADAMS, OR ANY
* OTHER CONTRIBUTOR) SHALL ASSUME THE COST OF ANY NECESSARY SERVICING,
* REPAIR OR CORRECTION. UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY,
* WHETHER TORT (INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL THE
* INITIAL DEVELOPER, THE UNIVERSITY OF BRITISH COLUMBIA, IMAGE POWER, INC.,
* MICHAEL DAVID ADAMS, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF THE
* JASPER SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE LIABLE TO
* THE USER OR ANY OTHER PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
* CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT LIMITATION,
* DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, COMPUTER FAILURE OR
* MALFUNCTION, OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES, EVEN IF
* SUCH PARTY HAD BEEN INFORMED, OR OUGHT TO HAVE KNOWN, OF THE POSSIBILITY
* OF SUCH DAMAGES. THE JASPER SOFTWARE AND UNDERLYING TECHNOLOGY ARE NOT
* FAULT-TOLERANT AND ARE NOT DESIGNED, MANUFACTURED OR INTENDED FOR USE OR
* RESALE AS ON-LINE CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING
* FAIL-SAFE PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES,
* AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT
* LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
* JASPER SOFTWARE OR UNDERLYING TECHNOLOGY OR PRODUCT COULD LEAD DIRECTLY
* TO DEATH, PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE
* ("HIGH RISK ACTIVITIES"). LICENSOR SPECIFICALLY DISCLAIMS ANY EXPRESS
* OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES. USER WILL NOT
* KNOWINGLY USE, DISTRIBUTE OR RESELL THE JASPER SOFTWARE OR UNDERLYING
* TECHNOLOGY OR PRODUCTS FOR HIGH RISK ACTIVITIES AND WILL ENSURE THAT ITS
* CUSTOMERS AND END-USERS OF ITS PRODUCTS ARE PROVIDED WITH A COPY OF THE
* NOTICE SPECIFIED IN THIS SECTION.
*
* __END_OF_JASPER_LICENSE__
*/

/*
* Tag Tree Library
*
* $Id: jpc_tagtree.c,v 1.1 2003/05/15 01:30:32 ace Exp $
*/

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

#include <limits.h>
#include <stdlib.h>
#include <assert.h>
#include <stdio.h>

#include "jas_malloc.h"

#include "jpc_tagtree.h"

/******************************************************************************\
* Prototypes.
\******************************************************************************/

static jpc_tagtree_t *jpc_tagtree_alloc(void);

/******************************************************************************\
* Code for creating and destroying tag trees.
\******************************************************************************/

/* Create a tag tree. */

jpc_tagtree_t *jpc_tagtree_create(int numleafsh, int numleafsv)
{
int nplh[JPC_TAGTREE_MAXDEPTH];
int nplv[JPC_TAGTREE_MAXDEPTH];
jpc_tagtreenode_t *node;
jpc_tagtreenode_t *parentnode;
jpc_tagtreenode_t *parentnode0;
jpc_tagtree_t *tree;
int i;
int j;
int k;
int numlvls;
int n;

assert(numleafsh > 0 && numleafsv > 0);

if (!(tree = jpc_tagtree_alloc())) {
return 0;
}
tree->numleafsh_ = numleafsh;
tree->numleafsv_ = numleafsv;

numlvls = 0;
nplh[0] = numleafsh;
nplv[0] = numleafsv;
do {
n = nplh[numlvls] * nplv[numlvls];
nplh[numlvls + 1] = (nplh[numlvls] + 1) / 2;
nplv[numlvls + 1] = (nplv[numlvls] + 1) / 2;
tree->numnodes_ += n;
++numlvls;
} while (n > 1);

if (!(tree->nodes_ = jas_malloc(tree->numnodes_ * sizeof(jpc_tagtreenode_t)))) {
return 0;
}

/* Initialize the parent links for all nodes in the tree. */

node = tree->nodes_;
parentnode = &tree->nodes_[tree->numleafsh_ * tree->numleafsv_];
parentnode0 = parentnode;

for (i = 0; i < numlvls - 1; ++i) {
for (j = 0; j < nplv[i]; ++j) {
k = nplh[i];
while (--k >= 0) {
node->parent_ = parentnode;
++node;
if (--k >= 0) {
node->parent_ = parentnode;
++node;
}
++parentnode;
}
if ((j & 1) || j == nplv[i] - 1) {
parentnode0 = parentnode;
} else {
parentnode = parentnode0;
parentnode0 += nplh[i];
}
}
}
node->parent_ = 0;

/* Initialize the data values to something sane. */

jpc_tagtree_reset(tree);

return tree;
}

/* Destroy a tag tree. */

void jpc_tagtree_destroy(jpc_tagtree_t *tree)
{
if (tree->nodes_) {
jas_free(tree->nodes_);
}
jas_free(tree);
}

static jpc_tagtree_t *jpc_tagtree_alloc()
{
jpc_tagtree_t *tree;

if (!(tree = jas_malloc(sizeof(jpc_tagtree_t)))) {
return 0;
}
tree->numleafsh_ = 0;
tree->numleafsv_ = 0;
tree->numnodes_ = 0;
tree->nodes_ = 0;

return tree;
}

/******************************************************************************\
* Code.
\******************************************************************************/

/* Copy state information from one tag tree to another. */

void jpc_tagtree_copy(jpc_tagtree_t *dsttree, jpc_tagtree_t *srctree)
{
int n;
jpc_tagtreenode_t *srcnode;
jpc_tagtreenode_t *dstnode;

/* The two tag trees must have similar sizes. */
assert(srctree->numleafsh_ == dsttree->numleafsh_ &&
srctree->numleafsv_ == dsttree->numleafsv_);

n = srctree->numnodes_;
srcnode = srctree->nodes_;
dstnode = dsttree->nodes_;
while (--n >= 0) {
dstnode->value_ = srcnode->value_;
dstnode->low_ = srcnode->low_;
dstnode->known_ = srcnode->known_;
++dstnode;
++srcnode;
}
}

/* Reset all of the state information associated with a tag tree. */

void jpc_tagtree_reset(jpc_tagtree_t *tree)
{
int n;
jpc_tagtreenode_t *node;

n = tree->numnodes_;
node = tree->nodes_;

while (--n >= 0) {
node->value_ = INT_MAX;
node->low_ = 0;
node->known_ = 0;
++node;
}
}

/* Set the value associated with the specified leaf node, updating
the other nodes as necessary. */

void jpc_tagtree_setvalue(jpc_tagtree_t *tree, jpc_tagtreenode_t *leaf,
int value)
{
jpc_tagtreenode_t *node;

/* Avoid compiler warnings about unused parameters. */
tree = 0;

assert(value >= 0);

node = leaf;
while (node && node->value_ > value) {
node->value_ = value;
node = node->parent_;
}
}

/* Get a particular leaf node. */

jpc_tagtreenode_t *jpc_tagtree_getleaf(jpc_tagtree_t *tree, int n)
{
return &tree->nodes_[n];
}

/* Invoke the tag tree encoding procedure. */

int jpc_tagtree_encode(jpc_tagtree_t *tree, jpc_tagtreenode_t *leaf,
int threshold, jpc_bitstream_t *out)
{
jpc_tagtreenode_t *stk[JPC_TAGTREE_MAXDEPTH - 1];
jpc_tagtreenode_t **stkptr;
jpc_tagtreenode_t *node;
int low;

/* Avoid compiler warnings about unused parameters. */
tree = 0;

assert(leaf);
assert(threshold >= 0);

/* Traverse to the root of the tree, recording the path taken. */
stkptr = stk;
node = leaf;
while (node->parent_) {
*stkptr++ = node;
node = node->parent_;
}

low = 0;
for (;;) {
if (low > node->low_) {
/* Deferred propagation of the lower bound downward in
the tree. */
node->low_ = low;
} else {
low = node->low_;
}

while (low < threshold) {
if (low >= node->value_) {
if (!node->known_) {
if (jpc_bitstream_putbit(out, 1) == EOF) {
return -1;
}
node->known_ = 1;
}
break;
}
if (jpc_bitstream_putbit(out, 0) == EOF) {
return -1;
}
++low;
}
node->low_ = low;
if (stkptr == stk) {
break;
}
node = *--stkptr;

}
return (leaf->low_ < threshold) ? 1 : 0;

}

/* Invoke the tag tree decoding procedure. */

int jpc_tagtree_decode(jpc_tagtree_t *tree, jpc_tagtreenode_t *leaf,
int threshold, jpc_bitstream_t *in)
{
jpc_tagtreenode_t *stk[JPC_TAGTREE_MAXDEPTH - 1];
jpc_tagtreenode_t **stkptr;
jpc_tagtreenode_t *node;
int low;
int ret;

/* Avoid compiler warnings about unused parameters. */
tree = 0;

assert(threshold >= 0);

/* Traverse to the root of the tree, recording the path taken. */
stkptr = stk;
node = leaf;
while (node->parent_) {
*stkptr++ = node;
node = node->parent_;
}

low = 0;
for (;;) {
if (low > node->low_) {
node->low_ = low;
} else {
low = node->low_;
}
while (low < threshold && low < node->value_) {
if ((ret = jpc_bitstream_getbit(in)) < 0) {
return -1;
}
if (ret) {
node->value_ = low;
} else {
++low;
}
}
node->low_ = low;
if (stkptr == stk) {
break;
}
node = *--stkptr;
}

return (node->value_ < threshold) ? 1 : 0;
}

/******************************************************************************\
* Code for debugging.
\******************************************************************************/

void jpc_tagtree_dump(jpc_tagtree_t *tree, FILE *out)
{
jpc_tagtreenode_t *node;
int n;

node = tree->nodes_;
n = tree->numnodes_;
while (--n >= 0) {
fprintf(out, "node %p, parent %p, value %d, lower %d, known %d\n",
(void *) node, (void *) node->parent_, node->value_, node->low_,
node->known_);
++node;
}
}

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