libopenraw
huffman.h
1 /* -*- mode:c++; tab-width:4; c-basic-offset:4 -*- */
2 /*
3  * libopenraw - huffman.h
4  *
5  * Copyright (C) 2008 Rafael Avila de Espindola.
6  *
7  * This library is free software: you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public License
9  * as published by the Free Software Foundation, either version 3 of
10  * the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this library. If not, see
19  * <http://www.gnu.org/licenses/>.
20  */
21 
22 #ifndef __HUFFMAN_H_
23 #define __HUFFMAN_H_
24 
25 #include <string>
26 #include "bititerator.h"
27 
28 namespace OpenRaw {
29 namespace Internals {
30 
31 struct HuffmanNode {
32  unsigned isLeaf :1;
33  unsigned data :31;
34 };
35 
37  unsigned int m_numNodes;
38  const HuffmanNode * const m_p;
39 
40  void printTable_(std::string, unsigned int) const;
41 public:
42  HuffmanDecoder(const HuffmanNode* const);
43  void printTable() const;
44  unsigned int decode(BitIterator& i);
45 };
46 
47 }
48 }
49 
50 #endif