Qt 4.8: fftreal_wrapper.cpp Example File (demos/spectrum/3rdparty/fftreal/fftreal_wrapper.cpp)

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# fftreal_wrapper.cpp Example File

demos/spectrum/3rdparty/fftreal/fftreal_wrapper.cpp

     /***************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** 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/>.
     **
     ***************************************************************************/

     #include "fftreal_wrapper.h"

     // FFTReal code generates quite a lot of 'unused parameter' compiler warnings,
     // which we suppress here in order to get a clean build output.
     #if defined Q_CC_MSVC
     #    pragma warning(disable:4100)
     #elif defined Q_CC_GNU
     #    pragma GCC diagnostic ignored "-Wunused-parameter"
     #elif defined Q_CC_MWERKS
     #    pragma warning off (10182)
     #endif

     #include "FFTRealFixLen.h"

     class FFTRealWrapperPrivate {
     public:
         FFTRealFixLen<FFTLengthPowerOfTwo> m_fft;
     };

     FFTRealWrapper::FFTRealWrapper()
         :   m_private(new FFTRealWrapperPrivate)
     {

     }

     FFTRealWrapper::~FFTRealWrapper()
     {
         delete m_private;
     }

     void FFTRealWrapper::calculateFFT(DataType in[], const DataType out[])
     {
         m_private->m_fft.do_fft(in, out);
     }