/***************************************************************************** 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 \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/

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