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itkFFTWComplexConjugateToRealImageFilter.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkFFTWComplexConjugateToRealImageFilter.h,v $
00005   Language:  C++
00006   Date:      $Date: 2009-05-12 17:26:20 $
00007   Version:   $Revision: 1.10 $
00008 
00009   Copyright (c) Insight Software Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 #ifndef __itkFFTWComplexConjugateToRealImageFilter_h
00018 #define __itkFFTWComplexConjugateToRealImageFilter_h
00019 
00020 #include "itkFFTComplexConjugateToRealImageFilter.h"
00021 
00022 //
00023 // FFTWCommon defines proxy classes based on data types
00024 #include "itkFFTWCommon.h"
00025 
00026 
00027 namespace itk
00028 {
00029 
00030 template <typename TPixel,unsigned int VDimension>
00031 class ITK_EXPORT FFTWComplexConjugateToRealImageFilter :
00032     public FFTComplexConjugateToRealImageFilter<TPixel,VDimension>
00033 {
00034 public:
00035   typedef FFTWComplexConjugateToRealImageFilter                   Self;
00036   typedef FFTComplexConjugateToRealImageFilter<TPixel,VDimension> Superclass;
00037   typedef SmartPointer<Self>                                      Pointer;
00038   typedef SmartPointer<const Self>                                ConstPointer;
00039   //
00040   // the proxy type is a wrapper for the fftw API
00041   // since the proxy is only defined over double and float,
00042   // trying to use any other pixel type is inoperative, as
00043   // is trying to use double if only the float FFTW version is 
00044   // configured in, or float if only double is configured.
00045   //
00046   typedef typename fftw::Proxy<TPixel> FFTWProxyType;
00047 
00049   typedef typename Superclass::TInputImageType  TInputImageType;
00050   typedef typename Superclass::TOutputImageType TOutputImageType;
00051 
00053   itkNewMacro(Self);
00054 
00056   itkTypeMacro(FFTWComplexConjugateToRealImageFilter,
00057                FFTComplexConjugateToRealImageFilter);
00058 
00060   typedef TInputImageType              ImageType;
00061   typedef typename ImageType::SizeType ImageSizeType;
00062 
00063   //
00064   // these should be defined in every FFT filter class
00065   virtual void GenerateData();  // generates output from input
00066   virtual bool FullMatrix();
00067 protected:
00068   FFTWComplexConjugateToRealImageFilter() : m_PlanComputed(false),
00069                                             m_LastImageSize(0),
00070                                             m_InputBuffer(0),
00071                                             m_OutputBuffer(0)
00072     {
00073     }
00074   virtual ~FFTWComplexConjugateToRealImageFilter()
00075     {
00076     if(m_PlanComputed)
00077       {
00078       FFTWProxyType::DestroyPlan(m_Plan);
00079       delete [] m_InputBuffer;
00080       delete [] m_OutputBuffer;
00081       }
00082     }
00083 
00084 private:
00085   FFTWComplexConjugateToRealImageFilter(const Self&); //purposely not implemented
00086   void operator=(const Self&); //purposely not implemented
00087   bool                             m_PlanComputed;
00088   typename FFTWProxyType::PlanType m_Plan;
00089   unsigned int                     m_LastImageSize;
00090   // local storage needed to keep fftw from scribbling on
00091   typename FFTWProxyType::ComplexType *m_InputBuffer;
00092   TPixel                              *m_OutputBuffer;
00093 };
00094 
00095 
00096 } // namespace itk
00097 
00098 #ifndef ITK_MANUAL_INSTANTIATION
00099 #include "itkFFTWComplexConjugateToRealImageFilter.txx"
00100 #endif
00101 
00102 #endif //__itkFFTWComplexConjugateToRealImageFilter_h
00103 

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