This commit was manufactured by cvs2svn to create tag 'start'.start

1 files changed, 225 insertions, 0 deletions

diff --git a/libopenjpeg/tgt.c b/libopenjpeg/tgt.c
new file mode 100644
index 00000000..4d4e2beb
--- /dev/null
+++ b/libopenjpeg/tgt.c
@@ -0,0 +1,225 @@
+/*
+ * Copyright (c) 2001-2002, David Janssens
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "tgt.h"
+#include "bio.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+/* <summary> */
+/* Reset tag-tree. */
+/* </summary> */
+void tgt_reset(tgt_tree_t * tree)
+{
+	int i;
+	/* new */
+	if (!tree || tree == NULL)
+		return;
+
+	for (i = 0; i < tree->numnodes; i++) {
+		tree->nodes[i].value = 999;
+		tree->nodes[i].low = 0;
+		tree->nodes[i].known = 0;
+	}
+}
+
+/* <summary> */
+/* Create tag-tree. */
+/* </summary> */
+tgt_tree_t *tgt_create(int numleafsh, int numleafsv)
+{
+	int nplh[32];
+	int nplv[32];
+	tgt_node_t *node;
+	tgt_node_t *parentnode;
+	tgt_node_t *parentnode0;
+	tgt_tree_t *tree;
+	int i, j, k;
+	int numlvls;
+	int n;
+
+	tree = (tgt_tree_t *) malloc(sizeof(tgt_tree_t));
+	tree->numleafsh = numleafsh;
+	tree->numleafsv = numleafsv;
+
+	numlvls = 0;
+	nplh[0] = numleafsh;
+	nplv[0] = numleafsv;
+	tree->numnodes = 0;
+	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);
+
+	/* ADD */
+	if (tree->numnodes == 0) {
+		free(tree);
+		return NULL;
+	}
+
+	tree->nodes = (tgt_node_t *) malloc(tree->numnodes * sizeof(tgt_node_t));
+
+	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;
+
+	tgt_reset(tree);
+
+	return tree;
+}
+
+/* <summary> */
+/* Destroy tag-tree. */
+/* </summary> */
+void tgt_destroy(tgt_tree_t * t)
+{
+	free(t->nodes);
+	free(t);
+}
+
+/* <summary> */
+/* Set the value of a leaf of the tag-tree. */
+/* </summary> */
+void tgt_setvalue(tgt_tree_t * tree, int leafno, int value)
+{
+	tgt_node_t *node;
+	node = &tree->nodes[leafno];
+	while (node && node->value > value) {
+		node->value = value;
+		node = node->parent;
+	}
+}
+
+/* <summary> */
+/* Encode the value of a leaf of the tag-tree. */
+/* </summary> */
+void tgt_encode(tgt_tree_t * tree, int leafno, int threshold)
+{
+	tgt_node_t *stk[31];
+	tgt_node_t **stkptr;
+	tgt_node_t *node;
+	int low;
+
+	stkptr = stk;
+	node = &tree->nodes[leafno];
+	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) {
+			if (low >= node->value) {
+				if (!node->known) {
+					bio_write(1, 1);
+					node->known = 1;
+				}
+				break;
+			}
+			bio_write(0, 1);
+			++low;
+		}
+
+		node->low = low;
+		if (stkptr == stk)
+			break;
+		node = *--stkptr;
+	}
+
+}
+
+/* <summary> */
+/* Decode the value of a leaf of the tag-tree. */
+/* </summary> */
+int tgt_decode(tgt_tree_t * tree, int leafno, int threshold)
+{
+	tgt_node_t *stk[31];
+	tgt_node_t **stkptr;
+	tgt_node_t *node;
+	int low;
+
+	stkptr = stk;
+	node = &tree->nodes[leafno];
+	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 (bio_read(1)) {
+				node->value = low;
+			} else {
+				++low;
+			}
+		}
+		node->low = low;
+		if (stkptr == stk) {
+			break;
+		}
+		node = *--stkptr;
+	}
+
+	return (node->value < threshold) ? 1 : 0;
+}