1 /***************************************************************************

     2 **

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

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

     5 **

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

     7 **

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

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

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

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

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

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

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

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

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

    17 **

    18 ***************************************************************************/

    19 

    20 #ifndef FFTREAL_WRAPPER_H

    21 #define FFTREAL_WRAPPER_H

    22 

    23 #include <QtCore/QtGlobal>

    24 

    25 #if defined(FFTREAL_LIBRARY)

    26 #  define FFTREAL_EXPORT Q_DECL_EXPORT

    27 #else

    28 #  define FFTREAL_EXPORT Q_DECL_IMPORT

    29 #endif

    30 

    31 class FFTRealWrapperPrivate;

    32 

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

    34 // number below.

    35 static const int FFTLengthPowerOfTwo = 12;

    36 

    37 /**

    38  * Wrapper around the FFTRealFixLen template provided by the FFTReal

    39  * library

    40  *

    41  * This class instantiates a single instance of FFTRealFixLen, using

    42  * FFTLengthPowerOfTwo as the template parameter.  It then exposes

    43  * FFTRealFixLen<FFTLengthPowerOfTwo>::do_fft via the calculateFFT

    44  * function, thereby allowing an application to dynamically link

    45  * against the FFTReal implementation.

    46  *

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

    48  */

    49 class FFTREAL_EXPORT FFTRealWrapper

    50 {

    51 public:

    52     FFTRealWrapper();

    53     ~FFTRealWrapper();

    54 

    55     typedef float DataType;

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

    57 

    58 private:

    59     FFTRealWrapperPrivate*  m_private;

    60 };

    61 

    62 #endif // FFTREAL_WRAPPER_H

    63