#if ! defined (FFTRealFixLen_HEADER_INCLUDED)
#define FFTRealFixLen_HEADER_INCLUDED
#if defined (_MSC_VER)
#pragma once
#pragma warning (4 : 4250) // "Inherits via dominance."
#endif
#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:
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:
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;
private:
FFTRealFixLen (const FFTRealFixLen &other);
FFTRealFixLen& operator = (const FFTRealFixLen &other);
bool operator == (const FFTRealFixLen &other);
bool operator != (const FFTRealFixLen &other);
};
#include "FFTRealFixLen.hpp"
#endif // FFTRealFixLen_HEADER_INCLUDED