/***************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the examples of the Qt Toolkit.

**

** This program is free software: you can redistribute it and/or modify

** it under the terms of the GNU Lesser General Public License as

** published by the Free Software Foundation, either version 2.1. This

** program is distributed in the hope that it will be useful, but WITHOUT

** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

** FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License

** for more details. You should have received a copy of the GNU General

** Public License along with this program. If not, see

** <http://www.gnu.org/licenses/>.

**

***************************************************************************/

#ifndef FFTREAL_WRAPPER_H

#define FFTREAL_WRAPPER_H

#include <QtCore/QtGlobal>

#if defined(FFTREAL_LIBRARY)

#  define FFTREAL_EXPORT Q_DECL_EXPORT

#else

#  define FFTREAL_EXPORT Q_DECL_IMPORT

#endif

class FFTRealWrapperPrivate;

// Each pass of the FFT processes 2^X samples, where X is the

// number below.

static const int FFTLengthPowerOfTwo = 12;

/**

 * Wrapper around the FFTRealFixLen template provided by the FFTReal

 * library

 *

 * This class instantiates a single instance of FFTRealFixLen, using

 * FFTLengthPowerOfTwo as the template parameter.  It then exposes

 * FFTRealFixLen<FFTLengthPowerOfTwo>::do_fft via the calculateFFT

 * function, thereby allowing an application to dynamically link

 * against the FFTReal implementation.

 *

 * See http://ldesoras.free.fr/prod.html

 */

class FFTREAL_EXPORT FFTRealWrapper

{

public:

    FFTRealWrapper();

    ~FFTRealWrapper();

    typedef float DataType;

    void calculateFFT(DataType in[], const DataType out[]);

private:

    FFTRealWrapperPrivate*  m_private;

};

#endif // FFTREAL_WRAPPER_H