RealFFTf48x.h

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#ifndef __realfftf48x_h
#define __realfftf48x_h
 
#include "MemoryX.h"
 
using fft_type = float;
 
int SmallRB(int bits, int numberBits);
 
enum {
   FFT_SinCosBRTable,
   FFT_SinCosTableVBR16,
   FFT_SinCosTableBR16,
   FFT_FastMathBR16,
   FFT_FastMathBR24
};
 
struct FFTParam;
 
/* wrapper functions. If passed -1 function choice will be made locally */
void RealFFTf1x(fft_type *, FFTParam*, int functionType=-1);
void InverseRealFFTf1x(fft_type *, FFTParam*, int functionType=-1);
void ReorderToTime1x(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut, int functionType=-1);
void ReorderToFreq1x(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut, int functionType=-1);
void RealFFTf4x(fft_type *, FFTParam *, int functionType=-1);
void InverseRealFFTf4x(fft_type *, FFTParam *, int functionType=-1);
void ReorderToTime4x(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut, int functionType=-1);
void ReorderToFreq4x(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut, int functionType=-1);
 
/* SinCosBRTable versions */
void RealFFTf1xSinCosBRTable(fft_type *, FFTParam*);
void InverseRealFFTf1xSinCosBRTable(fft_type *, FFTParam*);
void ReorderToTime1xSinCosBRTable(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut);
void ReorderToFreq1xSinCosBRTable(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut);
void RealFFTf4xSinCosBRTable(fft_type *, FFTParam *);
void InverseRealFFTf4xSinCosBRTable(fft_type *, FFTParam *);
void ReorderToTime4xSinCosBRTable(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut);
void ReorderToFreq4xSinCosBRTable(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut);
 
/* Fast Math BR16 versions */
void RealFFTf1xFastMathBR16(fft_type *, FFTParam*);
void InverseRealFFTf1xFastMathBR16(fft_type *, FFTParam*);
void ReorderToTime1xFastMathBR16(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut);
void ReorderToFreq1xFastMathBR16(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut);
void RealFFTf4xFastMathBR16(fft_type *, FFTParam *);
void InverseRealFFTf4xFastMathBR16(fft_type *, FFTParam *);
void ReorderToTime4xFastMathBR16(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut);
void ReorderToFreq4xFastMathBR16(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut);
 
/* Fast Math BR24 versions */
void RealFFTf1xFastMathBR24(fft_type *, FFTParam*);
void InverseRealFFTf1xFastMathBR24(fft_type *, FFTParam*);
void ReorderToTime1xFastMathBR24(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut);
void ReorderToFreq1xFastMathBR24(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut);
void RealFFTf4xFastMathBR24(fft_type *, FFTParam *);
void InverseRealFFTf4xFastMathBR24(fft_type *, FFTParam *);
void ReorderToTime4xFastMathBR24(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut);
void ReorderToFreq4xFastMathBR24(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut);
 
/* SinCosTable virtual BR versions */
void RealFFTf1xSinCosTableVBR16(fft_type *, FFTParam*);
void InverseRealFFTf1xSinCosTableVBR16(fft_type *, FFTParam*);
void ReorderToTime1xSinCosTableVBR16(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut);
void ReorderToFreq1xSinCosTableVBR16(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut);
void RealFFTf4xSinCosTableVBR16(fft_type *, FFTParam *);
void InverseRealFFTf4xSinCosTableVBR16(fft_type *, FFTParam *);
void ReorderToTime4xSinCosTableVBR16(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut);
void ReorderToFreq4xSinCosTableVBR16(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut);
 
/* SinCosTable BR16 versions */
void RealFFTf1xSinCosTableBR16(fft_type *, FFTParam*);
void InverseRealFFTf1xSinCosTableBR16(fft_type *, FFTParam*);
void ReorderToTime1xSinCosTableBR16(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut);
void ReorderToFreq1xSinCosTableBR16(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut);
void RealFFTf4xSinCosTableBR16(fft_type *, FFTParam *);
void InverseRealFFTf4xSinCosTableBR16(fft_type *, FFTParam *);
void ReorderToTime4xSinCosTableBR16(FFTParam *hFFT, fft_type *buffer, fft_type *TimeOut);
void ReorderToFreq4xSinCosTableBR16(FFTParam *hFFT, fft_type *buffer, fft_type *RealOut, fft_type *ImagOut);
 
void TableUsage(int iMask);
 
#ifndef M_PI
#define  M_PI     3.14159265358979323846  /* pi */
#endif
 
typedef struct  {
   float mSin;
   float mCos;
} SinCosStruct;
 
class SinCosTable {
public:
   int mSinCosTablePow;
   ArrayOf<SinCosStruct> mSinCosTable;
   SinCosTable();
};
 
int SmallRB(int bits, int numberBits);
extern int (*SmallVRB[])(int bits);
 
 
#endif