2 Copyright (C) 2006 Paul Davis
3 Written by Sampo Savolainen
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include <fft_result.h>
22 #include <fft_graph.h>
31 FFTResult::FFTResult(FFTGraph *graph, Gdk::Color color, string trackname)
35 _windowSize = _graph->windowSize();
36 _dataSize = _windowSize / 2;
40 _data = (float *) malloc(sizeof(float) * _dataSize);
41 memset(_data,0,sizeof(float) * _dataSize);
44 _trackname = trackname;
48 FFTResult::analyzeWindow(float *window)
50 _graph->analyze(window, _data);
64 for (int i = 0; i < _dataSize; i++) {
65 _data[i] /= _averages;
66 _data[i] = 10.0f * log10f(_data[i]);
70 _minimum = _maximum = _data[0];
72 for (int i = 1; i < _dataSize; i++) {
73 if (_data[i] < _minimum && !isinf(_data[i])) {
75 } else if (_data[i] > _maximum && !isinf(_data[i])) {
83 FFTResult::~FFTResult()
90 FFTResult::sampleAt(int x)
92 if (x < 0 || x>= _dataSize)