2 * The copyright in this software is being made available under the 2-clauses
3 * BSD License, included below. This software may be subject to other third
4 * party and contributor rights, including patent rights, and no such rights
5 * are granted under this license.
7 * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
8 * Copyright (c) 2002-2014, Professor Benoit Macq
9 * Copyright (c) 2001-2003, David Janssens
10 * Copyright (c) 2002-2003, Yannick Verschueren
11 * Copyright (c) 2003-2007, Francois-Olivier Devaux
12 * Copyright (c) 2003-2014, Antonin Descampe
13 * Copyright (c) 2005, Herve Drolon, FreeImage Team
14 * Copyright (c) 2008, 2011-2012, Centre National d'Etudes Spatiales (CNES), FR
15 * Copyright (c) 2012, CS Systemes d'Information, France
16 * All rights reserved.
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19 * modification, are permitted provided that the following conditions
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40 #include "opj_includes.h"
43 ==========================================================
44 Tag-tree coder interface
45 ==========================================================
48 opj_tgt_tree_t *opj_tgt_create(OPJ_UINT32 numleafsh, OPJ_UINT32 numleafsv,
49 opj_event_mgr_t *p_manager)
53 opj_tgt_node_t *node = 00;
54 opj_tgt_node_t *l_parent_node = 00;
55 opj_tgt_node_t *l_parent_node0 = 00;
56 opj_tgt_tree_t *tree = 00;
62 tree = (opj_tgt_tree_t *) opj_calloc(1, sizeof(opj_tgt_tree_t));
64 opj_event_msg(p_manager, EVT_ERROR, "Not enough memory to create Tag-tree\n");
68 tree->numleafsh = numleafsh;
69 tree->numleafsv = numleafsv;
72 nplh[0] = (OPJ_INT32)numleafsh;
73 nplv[0] = (OPJ_INT32)numleafsv;
76 n = (OPJ_UINT32)(nplh[numlvls] * nplv[numlvls]);
77 nplh[numlvls + 1] = (nplh[numlvls] + 1) / 2;
78 nplv[numlvls + 1] = (nplv[numlvls] + 1) / 2;
84 if (tree->numnodes == 0) {
89 tree->nodes = (opj_tgt_node_t*) opj_calloc(tree->numnodes,
90 sizeof(opj_tgt_node_t));
92 opj_event_msg(p_manager, EVT_ERROR,
93 "Not enough memory to create Tag-tree nodes\n");
97 tree->nodes_size = tree->numnodes * (OPJ_UINT32)sizeof(opj_tgt_node_t);
100 l_parent_node = &tree->nodes[tree->numleafsh * tree->numleafsv];
101 l_parent_node0 = l_parent_node;
103 for (i = 0; i < numlvls - 1; ++i) {
104 for (j = 0; j < nplv[i]; ++j) {
107 node->parent = l_parent_node;
110 node->parent = l_parent_node;
115 if ((j & 1) || j == nplv[i] - 1) {
116 l_parent_node0 = l_parent_node;
118 l_parent_node = l_parent_node0;
119 l_parent_node0 += nplh[i];
129 * Reinitialises a tag-tree from an existing one.
131 * @param p_tree the tree to reinitialize.
132 * @param p_num_leafs_h the width of the array of leafs of the tree
133 * @param p_num_leafs_v the height of the array of leafs of the tree
134 * @return a new tag-tree if successful, NULL otherwise
136 opj_tgt_tree_t *opj_tgt_init(opj_tgt_tree_t * p_tree, OPJ_UINT32 p_num_leafs_h,
137 OPJ_UINT32 p_num_leafs_v, opj_event_mgr_t *p_manager)
139 OPJ_INT32 l_nplh[32];
140 OPJ_INT32 l_nplv[32];
141 opj_tgt_node_t *l_node = 00;
142 opj_tgt_node_t *l_parent_node = 00;
143 opj_tgt_node_t *l_parent_node0 = 00;
146 OPJ_UINT32 l_num_levels;
148 OPJ_UINT32 l_node_size;
154 if ((p_tree->numleafsh != p_num_leafs_h) ||
155 (p_tree->numleafsv != p_num_leafs_v)) {
156 p_tree->numleafsh = p_num_leafs_h;
157 p_tree->numleafsv = p_num_leafs_v;
160 l_nplh[0] = (OPJ_INT32)p_num_leafs_h;
161 l_nplv[0] = (OPJ_INT32)p_num_leafs_v;
162 p_tree->numnodes = 0;
164 n = (OPJ_UINT32)(l_nplh[l_num_levels] * l_nplv[l_num_levels]);
165 l_nplh[l_num_levels + 1] = (l_nplh[l_num_levels] + 1) / 2;
166 l_nplv[l_num_levels + 1] = (l_nplv[l_num_levels] + 1) / 2;
167 p_tree->numnodes += n;
172 if (p_tree->numnodes == 0) {
173 opj_tgt_destroy(p_tree);
176 l_node_size = p_tree->numnodes * (OPJ_UINT32)sizeof(opj_tgt_node_t);
178 if (l_node_size > p_tree->nodes_size) {
179 opj_tgt_node_t* new_nodes = (opj_tgt_node_t*) opj_realloc(p_tree->nodes,
182 opj_event_msg(p_manager, EVT_ERROR,
183 "Not enough memory to reinitialize the tag tree\n");
184 opj_tgt_destroy(p_tree);
187 p_tree->nodes = new_nodes;
188 memset(((char *) p_tree->nodes) + p_tree->nodes_size, 0,
189 l_node_size - p_tree->nodes_size);
190 p_tree->nodes_size = l_node_size;
192 l_node = p_tree->nodes;
193 l_parent_node = &p_tree->nodes[p_tree->numleafsh * p_tree->numleafsv];
194 l_parent_node0 = l_parent_node;
196 for (i = 0; i < l_num_levels - 1; ++i) {
197 for (j = 0; j < l_nplv[i]; ++j) {
200 l_node->parent = l_parent_node;
203 l_node->parent = l_parent_node;
208 if ((j & 1) || j == l_nplv[i] - 1) {
209 l_parent_node0 = l_parent_node;
211 l_parent_node = l_parent_node0;
212 l_parent_node0 += l_nplh[i];
218 opj_tgt_reset(p_tree);
223 void opj_tgt_destroy(opj_tgt_tree_t *p_tree)
230 opj_free(p_tree->nodes);
236 void opj_tgt_reset(opj_tgt_tree_t *p_tree)
239 opj_tgt_node_t * l_current_node = 00;;
245 l_current_node = p_tree->nodes;
246 for (i = 0; i < p_tree->numnodes; ++i) {
247 l_current_node->value = 999;
248 l_current_node->low = 0;
249 l_current_node->known = 0;
254 void opj_tgt_setvalue(opj_tgt_tree_t *tree, OPJ_UINT32 leafno, OPJ_INT32 value)
256 opj_tgt_node_t *node;
257 node = &tree->nodes[leafno];
258 while (node && node->value > value) {
264 void opj_tgt_encode(opj_bio_t *bio, opj_tgt_tree_t *tree, OPJ_UINT32 leafno,
267 opj_tgt_node_t *stk[31];
268 opj_tgt_node_t **stkptr;
269 opj_tgt_node_t *node;
273 node = &tree->nodes[leafno];
274 while (node->parent) {
281 if (low > node->low) {
287 while (low < threshold) {
288 if (low >= node->value) {
290 opj_bio_putbit(bio, 1);
295 opj_bio_putbit(bio, 0);
307 OPJ_UINT32 opj_tgt_decode(opj_bio_t *bio, opj_tgt_tree_t *tree,
308 OPJ_UINT32 leafno, OPJ_INT32 threshold)
310 opj_tgt_node_t *stk[31];
311 opj_tgt_node_t **stkptr;
312 opj_tgt_node_t *node;
316 node = &tree->nodes[leafno];
317 while (node->parent) {
324 if (low > node->low) {
329 while (low < threshold && low < node->value) {
330 if (opj_bio_read(bio, 1)) {
343 return (node->value < threshold) ? 1 : 0;