00001 // /// // C++ Cross Platform 00002 // ///// //// 00003 // /// XXX XXX /// /////////// ///////// /// /// 00004 // /// XXX XXX /// /// /// /// /// /// 00005 // /// XXX /// ///////// /// // ////// 00006 // /// XXX XXX /// /// /// /// /// /// 00007 // //// XXX XXX //// //////////// ////////// /// /// 00008 // //// //// 00009 // //// M O B O T I X //////////////////////////////////////////////// 00010 // //// Security Vision Systems ////////////////////////////////////////////// 00011 // 00012 // $Author: khe_admin $ 00013 // $LastChangedBy: khe_admin $ 00014 // $LastChangedDate: 2007-06-29 12:31:37 +0200 (Fri, 29 Jun 2007) $ 00015 // $HeadURL: http://svn.mobotix.net/svn/mxsdk/src/MxPEGCoreComponent/trunk/include/mxcpcHuffmanTree.h $ 00016 // 00018 // 00019 // MOBOTIX MxPEG SDK 00020 // 00021 // This file belongs to the C++ library released as part of the MxPEG SDK. 00022 // 00023 // This software is licensed under the BSD licence, 00024 // http://www.opensource.org/licenses/bsd-license.php 00025 // 00026 // Copyright (c) 2005 - 2007, MOBOTIX AG 00027 // All rights reserved. 00028 // 00029 // Redistribution and use in source and binary forms, with or without 00030 // modification, are permitted provided that the following conditions are 00031 // met: 00032 // 00033 // - Redistributions of source code must retain the above copyright 00034 // notice, this list of conditions and the following disclaimer. 00035 // 00036 // - Redistributions in binary form must reproduce the above copyright 00037 // notice, this list of conditions and the following disclaimer in the 00038 // documentation and/or other materials provided with the distribution. 00039 // 00040 // - Neither the name of MOBOTIX AG nor the names of its contributors may 00041 // be used to endorse or promote products derived from this software 00042 // without specific prior written permission. 00043 // 00044 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00045 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00046 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00047 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 00048 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00049 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00050 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00051 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00052 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00053 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00054 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00055 // 00057 00058 00059 00060 #ifndef __MXCPC_HUFFMANTREE_H__ 00061 #define __MXCPC_HUFFMANTREE_H__ 00062 00063 00064 00067 00070 class mxcpcHuffmanTree { 00071 00072 public: 00073 struct Node { 00074 Node *Child0, *Child1; 00075 bool IsLeaf; 00076 unsigned char Value; 00077 }; 00078 00079 private: 00080 Node *RootNode; 00081 Node *GroundNode; 00082 00083 public: 00084 mxcpcHuffmanTree(); 00085 ~mxcpcHuffmanTree(); 00086 00087 public: 00089 const Node *getRoot(void); 00090 00092 void clear(void); 00095 00099 bool configureFromTable(const unsigned char *table, int max_path_len = 16); 00102 00106 bool addLeaf(int path_len, unsigned char value); 00108 int countLeaves(void); 00109 00110 private: 00112 void deleteSubTree(Node *subtree_root); 00115 00119 bool addLeaf(Node *subtree_root, int path_len, Node *leaf); 00122 00128 void groundUnusedPaths(Node *subtree); 00130 int countLeaves(Node *subtree); 00131 }; 00132 00133 00134 00135 #endif // __MXCPC_HUFFMANTREE_H__