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Diffstat (limited to 'src/3rdparty/jasper/src/libjasper/jpc/jpc_tagtree.c')
| -rw-r--r-- | src/3rdparty/jasper/src/libjasper/jpc/jpc_tagtree.c | 393 |
1 files changed, 393 insertions, 0 deletions
diff --git a/src/3rdparty/jasper/src/libjasper/jpc/jpc_tagtree.c b/src/3rdparty/jasper/src/libjasper/jpc/jpc_tagtree.c new file mode 100644 index 0000000..49c3bd0 --- /dev/null +++ b/src/3rdparty/jasper/src/libjasper/jpc/jpc_tagtree.c @@ -0,0 +1,393 @@ +/* + * 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__ + */ + +/* + * Tag Tree Library + * + * $Id$ + */ + +/******************************************************************************\ +* Includes. +\******************************************************************************/ + +#include <limits.h> +#include <stdlib.h> +#include <assert.h> +#include <stdio.h> + +#include "jasper/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; + } +} |