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104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
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/***********************************************************************
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qfouriertransformer.h - Header file for QFourierTransformer
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Facade class for calculating FFTs from a set of samples.
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************************************************************************
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This file is part of QRealFourier.
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QRealFourier is free software: you can redistribute it and/or modify it
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under the terms of the Lesser GNU General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Foobar is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
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License for more details.
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You should have received a copy of the Lesser GNU General Public License
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along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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************************************************************************
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Copyright © 2012 - 2013 Christoph Stallmann, University of Pretoria
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Developer: Christoph Stallmann
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University of Pretoria
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Department of Computer Science
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http://www.visore.org
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http://sourceforge.net/projects/qrealfourier
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http://github.com/visore/QRealFourier
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qrealfourier@visore.org
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qrealfourier@gmail.com
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***********************************************************************/
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#ifndef QFOURIERTRANSFORMER_H
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#define QFOURIERTRANSFORMER_H
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#include "qfouriercalculator.h"
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#include "qwindowfunction.h"
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#include "qcomplexnumber.h"
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#include <QMap>
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typedef QVector<QComplexFloat> QComplexVector;
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class QFourierTransformer
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{
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public:
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enum Direction
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{
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Forward = 0,
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Inverse = 1
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};
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enum Initialization
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{
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VariableSize = 0,
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FixedSize = 1,
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InvalidSize = 2
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};
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public:
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QFourierTransformer(int size = 0, QString functionName = "");
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~QFourierTransformer();
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Initialization setSize(int size);
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bool setWindowFunction(QString functionName);
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QStringList windowFunctions();
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void transform(float input[], float output[], Direction direction = QFourierTransformer::Forward);
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void forwardTransform(float *input, float *output);
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void inverseTransform(float input[], float output[]);
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void rescale(float input[]);
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void conjugate(float input[]);
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QComplexVector toComplex(float input[]);
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protected:
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void initialize();
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int sizeToKey(int size);
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bool isValidSize(int value);
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private:
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int mSize;
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QMap<int, QFourierCalculator*> mFixedCalculators;
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QFourierCalculator* mVariableCalculator;
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QFourierCalculator *mCalculator;
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QStringList mWindowFunctions;
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QWindowFunction<float> *mWindowFunction;
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};
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#endif
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