1 /*
2  *  Copyright (C) 2010  Regents of the University of Michigan
3  *
4  *   This program is free software: you can redistribute it and/or modify
5  *   it under the terms of the GNU General Public License as published by
6  *   the Free Software Foundation, either version 3 of the License, or
7  *   (at your option) any later version.
8  *
9  *   This program is distributed in the hope that it will be useful,
10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  *   GNU General Public License for more details.
13  *
14  *   You should have received a copy of the GNU General Public License
15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 #include "BaseQualityHelper.h"
19 
20 #include <math.h>
21 
22 baseQualityConvertor bQualityConvertor;
23 
baseQualityConvertor()24 baseQualityConvertor::baseQualityConvertor()
25 {
26     // Create a quick lookup table to speed up conversion of
27     // base quality values stored as log10 (error rates) into
28     // fractional error rates
29     for (int i = 0; i <= 255; i++)
30         doubleLookup[i] = pow(0.1, i * 0.1);
31     // doubleLookup[255] = 0.0;
32 }
33 
toDouble(unsigned char bq)34 double baseQualityConvertor::toDouble(unsigned char bq)
35 {
36     return doubleLookup[bq];
37 }
38 
39