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4680 | right-hear | 1 | /* |
2 | * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium |
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3 | * Copyright (c) 2002-2007, Professor Benoit Macq |
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4 | * Copyright (c) 2001-2003, David Janssens |
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5 | * Copyright (c) 2002-2003, Yannick Verschueren |
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6 | * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe |
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7 | * Copyright (c) 2005, Herve Drolon, FreeImage Team |
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8 | * All rights reserved. |
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9 | * |
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10 | * Redistribution and use in source and binary forms, with or without |
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11 | * modification, are permitted provided that the following conditions |
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12 | * are met: |
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13 | * 1. Redistributions of source code must retain the above copyright |
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14 | * notice, this list of conditions and the following disclaimer. |
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15 | * 2. Redistributions in binary form must reproduce the above copyright |
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16 | * notice, this list of conditions and the following disclaimer in the |
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17 | * documentation and/or other materials provided with the distribution. |
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18 | * |
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19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' |
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20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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29 | * POSSIBILITY OF SUCH DAMAGE. |
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30 | */ |
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31 | |||
32 | #ifndef __TGT_H |
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33 | #define __TGT_H |
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34 | /** |
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35 | @file tgt.h |
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36 | @brief Implementation of a tag-tree coder (TGT) |
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37 | |||
38 | The functions in TGT.C have for goal to realize a tag-tree coder. The functions in TGT.C |
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39 | are used by some function in T2.C. |
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40 | */ |
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41 | |||
42 | /** @defgroup TGT TGT - Implementation of a tag-tree coder */ |
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43 | /*@{*/ |
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44 | |||
45 | /** |
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46 | Tag node |
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47 | */ |
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48 | typedef struct opj_tgt_node { |
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49 | struct opj_tgt_node *parent; |
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50 | int value; |
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51 | int low; |
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52 | int known; |
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53 | } opj_tgt_node_t; |
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54 | |||
55 | /** |
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56 | Tag tree |
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57 | */ |
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58 | typedef struct opj_tgt_tree { |
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59 | int numleafsh; |
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60 | int numleafsv; |
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61 | int numnodes; |
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62 | opj_tgt_node_t *nodes; |
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63 | } opj_tgt_tree_t; |
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64 | |||
65 | /** @name Exported functions */ |
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66 | /*@{*/ |
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67 | /* ----------------------------------------------------------------------- */ |
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68 | /** |
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69 | Create a tag-tree |
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70 | @param numleafsh Width of the array of leafs of the tree |
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71 | @param numleafsv Height of the array of leafs of the tree |
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72 | @return Returns a new tag-tree if successful, returns NULL otherwise |
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73 | */ |
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74 | opj_tgt_tree_t *tgt_create(int numleafsh, int numleafsv); |
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75 | /** |
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76 | Destroy a tag-tree, liberating memory |
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77 | @param tree Tag-tree to destroy |
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78 | */ |
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79 | void tgt_destroy(opj_tgt_tree_t *tree); |
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80 | /** |
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81 | Reset a tag-tree (set all leaves to 0) |
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82 | @param tree Tag-tree to reset |
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83 | */ |
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84 | void tgt_reset(opj_tgt_tree_t *tree); |
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85 | /** |
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86 | Set the value of a leaf of a tag-tree |
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87 | @param tree Tag-tree to modify |
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88 | @param leafno Number that identifies the leaf to modify |
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89 | @param value New value of the leaf |
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90 | */ |
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91 | void tgt_setvalue(opj_tgt_tree_t *tree, int leafno, int value); |
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92 | /** |
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93 | Encode the value of a leaf of the tag-tree up to a given threshold |
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94 | @param bio Pointer to a BIO handle |
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95 | @param tree Tag-tree to modify |
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96 | @param leafno Number that identifies the leaf to encode |
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97 | @param threshold Threshold to use when encoding value of the leaf |
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98 | */ |
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99 | void tgt_encode(opj_bio_t *bio, opj_tgt_tree_t *tree, int leafno, int threshold); |
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100 | /** |
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101 | Decode the value of a leaf of the tag-tree up to a given threshold |
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102 | @param bio Pointer to a BIO handle |
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103 | @param tree Tag-tree to decode |
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104 | @param leafno Number that identifies the leaf to decode |
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105 | @param threshold Threshold to use when decoding value of the leaf |
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106 | @return Returns 1 if the node's value < threshold, returns 0 otherwise |
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107 | */ |
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108 | int tgt_decode(opj_bio_t *bio, opj_tgt_tree_t *tree, int leafno, int threshold); |
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109 | /* ----------------------------------------------------------------------- */ |
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110 | /*@}*/ |
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111 | |||
112 | /*@}*/ |
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113 | |||
114 | #endif /* __TGT_H */> |