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vnl_fft_base.h

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00001 #ifndef vnl_fft_base_h_
00002 #define vnl_fft_base_h_
00003 /*
00004   fsm@robots.ox.ac.uk
00005 */
00006 
00007 //: Base class for in-place ND fast fourier transform.
00008 
00009 #include <vcl_complex.h>
00010 #include <vnl/algo/vnl_fft_prime_factors.h>
00011 
00012 export template <int D, class T>
00013 struct vnl_fft_base
00014 {
00015   vnl_fft_base() { }
00016   
00017   //: dir = +1/-1 according to direction of transform.
00018   void transform(vcl_complex<T> *signal, int dir);
00019   
00020 protected: 
00021   //: prime factorizations of signal dimensions.
00022   vnl_fft_prime_factors<T> factors_[D];
00023 };
00024 
00025 #endif

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