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/*
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) 2008-2008 - INRIA - Allan SIMON
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
*
*/
#ifndef __FFT_INTERNAL_H__
#define __FFT_INTERNAL_H__
#include "addition.h"
#include "subtraction.h"
#define FORWARD 0
#define INVERSE 1
void dfft2 ( double* a , double* b , int nseg , int n , int nspn ,
int isn , int ierr);
void dfftbi ( double* a , double* b , int nseg , int n , int nspn ,
int isn , int ierr );
void fft842 (doubleComplex* b, int size , int in);
void r2tx(int nthpo, doubleComplex* c0, doubleComplex* c1);
void r4tx( int nthpo, doubleComplex* c0, doubleComplex* c1, doubleComplex* c2, doubleComplex* c3);
void r8tx ( int nxtlt,int nthpo,int lengt,
doubleComplex* cc0,doubleComplex* cc1,doubleComplex* cc2,doubleComplex* cc3,
doubleComplex* cc4,doubleComplex* cc5,doubleComplex* cc6,doubleComplex* cc7);
int dfftmx ( double* _pdblA , double* _pdblB , int _iNtot, int _iN, int _iNspan,
int _iIsn, int _iM, int _iKt, double* _pdblWt, double* _pdblCk,
double* _pdblBt, double* _pdblSk, int* _piNp, int* _piNfac);
/* under functions used by dfftmx */
void preliminaryWork (void);
void preliminaryWork (void);
void permute_stage1 (void);
void permute_stage2 (void);
void f4t_150 (void);
void factorOf3Transform (void) ;
void factorOf5Transform (void) ;
void preFOtherTransform (void);
void factorOfOtherTransform (void);
void pre_sqFactor2NormlOrder (void);
void nonSqFactor2NormOrder (void) ;
void detPermutCycles (void);
void reorderMatrix (void ) ;
int f4t_170 (void);
int factorTransform (void);
int pre_fOf2Trans (void);
int factorOf2Transform (void);
int factorOf4Transform (void);
int mulByRotationFactor (void );
int post_sqFactor2NormlOrder (void);
int single_sqFactor2NormlOrder (void);
int preF2transform (void) ;
int multi_sqFactor2NormlOrder (void);
int end (void) ;
#endif /* !__FFT_INTERNAL_H__ */
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