XXFastFourierTransfrom.h

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#ifndef XXFastFourierTransfromH
#define XXFastFourierTransfromH
 
#include "XXAudioExportDef.h"
 
#include <QException>
 
#include <complex>
 
#include "XXSampleAbstract.h"
 
// may throw Exception
namespace XX
{
 
   class XXAUDIO_DECLSPEC FastFourierTransfrom
   {
   public:
      using ComplexType = std::complex<float>;
      using ComplexData = QList<ComplexType>;
 
   public:
      FastFourierTransfrom(const size_t size);
 
   public:
      static ComplexData fill(const Sample::Data& data);
      static Sample::Data strip(const ComplexData& data);
 
      ComplexData forward(const ComplexData& input);
      ComplexData inverse(const ComplexData& input);
 
      const size_t& getSize() const;
 
   private:
      void bitReverse(ComplexData& data) const;
      void transform(ComplexData& data, bool forward) const;
 
      void bitReverseB(ComplexData& data) const;
      void transformB(ComplexData& data, bool forward) const;
 
   private:
      const size_t size;
   };
} // namespace XX
 
#endif // NOT XXFastFourierTransfromH