2 * Copyright (C) 2008, Francisco Claude, all rights reserved.
4 * wt_coder_huff definition
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 #ifndef wt_coder_huff_h
23 #define wt_coder_huff_h
27 #include <huffman_codes.h>
28 #include <alphabet_mapper.h>
30 /** Uses huffman codes to determine the shape of the wavelet tree
32 * @author Francisco Claude
34 class wt_coder_huff: public wt_coder {
36 /** Buils a wt_coder_huff using the sequence of length n and the alphabet_mapper
37 * to determine the huffman codes */
38 wt_coder_huff(uint *symbs, uint n, alphabet_mapper * am);
39 virtual ~wt_coder_huff();
40 virtual bool is_set(uint symbol, uint l);
41 virtual bool done(uint symbol, uint l);
43 virtual uint save(FILE *fp);
44 static wt_coder_huff * load(FILE *fp);
45 //uint * get_buffer(uint symbol, uint *n);
51 uint last_symbol, s_len;