cFFT.h

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//
//
 
#ifndef _INC_cFFT_H
#define _INC_cFFT_H
#ifndef NO_PRAGMA_ONCE
#pragma once
#endif
 
#include "Calc.h"
#include "GrayCore/include/cArray.h"
#include "GrayCore/include/cBits.h"
 
#ifdef GRAY_DLL // force implementation/instantiate for DLL/SO.
namespace Gray
{
        template class GRAYLIB_LINK CArray<BYTE, BYTE>;
        template class GRAYLIB_LINK CArray<short, short>;
        template class GRAYLIB_LINK CArray<LONG, LONG>;
}
#endif
 
namespace GrayLib
{
        UNITTEST2_PREDEF(cFFT);
        class GRAYLIB_LINK cHammingWindow
        {
        };
 
        class GRAYLIB_LINK cFFT
        {
 
        public:
                bool    m_bAutoScale;           
                static const BIT_ENUM_t k_DATASHIFT = 8;        // number of bits.
                cArrayVal<LONG> m_Data;                 
                LONG    m_lScale;                               
 
        private:
                const BIT_ENUM_t m_iFrameLengthBits;    
                const ITERATE_t m_iFrameLength;         
                const ITERATE_t m_iFrameHalf;                   
 
                CArray<BYTE, BYTE> m_HamWin;                    
                CArray<short, short> m_SineTable;       
 
        public:
                cFFT(BIT_ENUM_t iLengthBits, bool bAutoScale = true);
                ~cFFT();
 
                void DoHamWin();
                void DoFFT();
                void DoScale();
 
                UNITTEST_FRIEND(cFFT);
        };
};
#endif  // _INC_cFFT_H