FFTRealFixLen.h Example File

/*****************************************************************************
        FFTRealFixLen.h
        Copyright (c) 2005 Laurent de Soras
--- Legal stuff ---
This library 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 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*Tab=3***********************************************************************/
#if ! defined (FFTRealFixLen_HEADER_INCLUDED)
#define FFTRealFixLen_HEADER_INCLUDED
#if defined (_MSC_VER)
        #pragma once
        #pragma warning (4 : 4250) // "Inherits via dominance."
#endif
/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
#include        "Array.h"
#include        "DynArray.h"
#include        "FFTRealFixLenParam.h"
#include        "OscSinCos.h"
template <int LL2>
class FFTRealFixLen
{
        typedef int     CompileTimeCheck1 [(LL2 >=  0) ? 1 : -1];
        typedef int     CompileTimeCheck2 [(LL2 <= 30) ? 1 : -1];
/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
public:
   typedef      FFTRealFixLenParam::DataType   DataType;
        typedef OscSinCos <DataType>    OscType;
        enum {                  FFT_LEN_L2      = LL2   };
        enum {                  FFT_LEN         = 1 << FFT_LEN_L2       };
                                                FFTRealFixLen ();
        inline long             get_length () const;
        void                            do_fft (DataType f [], const DataType x []);
        void                            do_ifft (const DataType f [], DataType x []);
        void                            rescale (DataType x []) const;
/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
protected:
/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
private:
        enum {                  TRIGO_BD_LIMIT  = FFTRealFixLenParam::TRIGO_BD_LIMIT    };
        enum {                  BR_ARR_SIZE_L2  = ((FFT_LEN_L2 - 3) < 0) ? 0 : (FFT_LEN_L2 - 2) };
        enum {                  BR_ARR_SIZE             = 1 << BR_ARR_SIZE_L2   };
   enum {                       TRIGO_BD                        =   ((FFT_LEN_L2 - TRIGO_BD_LIMIT) < 0)
                                                                                          ? (int)FFT_LEN_L2
                                                                                          : (int)TRIGO_BD_LIMIT };
        enum {                  TRIGO_TABLE_ARR_SIZE_L2 = (LL2 < 4) ? 0 : (TRIGO_BD - 2)        };
        enum {                  TRIGO_TABLE_ARR_SIZE    = 1 << TRIGO_TABLE_ARR_SIZE_L2  };
        enum {                  NBR_TRIGO_OSC                   = FFT_LEN_L2 - TRIGO_BD };
        enum {                  TRIGO_OSC_ARR_SIZE      =       (NBR_TRIGO_OSC > 0) ? NBR_TRIGO_OSC : 1 };
        void                            build_br_lut ();
        void                            build_trigo_lut ();
        void                            build_trigo_osc ();
        DynArray <DataType>
                                                _buffer;
        DynArray <long>
                                                _br_data;
        DynArray <DataType>
                                                _trigo_data;
   Array <OscType, TRIGO_OSC_ARR_SIZE>
                                                _trigo_osc;
/*\\\ FORBIDDEN MEMBER FUNCTIONS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
private:
                                                FFTRealFixLen (const FFTRealFixLen &other);
        FFTRealFixLen&  operator = (const FFTRealFixLen &other);
        bool                            operator == (const FFTRealFixLen &other);
        bool                            operator != (const FFTRealFixLen &other);
};      // class FFTRealFixLen
#include        "FFTRealFixLen.hpp"
#endif  // FFTRealFixLen_HEADER_INCLUDED
/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/