/*  FrvTF.h by  F. Marion and B. Mours   Mau 01, 2002           */

#ifndef FRVTF
#define FRVTF

#ifndef _POSIX_SOURCE
#define _POSIX_SOURCE
#endif

#include "FrameL.h"
#include "FrvBuf.h"
#include "FrvFFT.h"

#ifdef __cplusplus
extern "C" {
#endif

struct FrvTF {
                             /*--------------------- input data -------------*/
  double decay;              /* decay time for averageing (could by changed) */
  long nDecay;               /* #of fft for the mean spectrum(could be reset)*/
  int  outSize;              /* number of bin for the transfert function     */
  int decimate;              /* decimation                                   */
                             /*------------------- internal data ------------*/
  FRBOOL  optionC;           /* if = FR_YES compute the coherence            */
  FRBOOL  optionE;           /* if = FR_YES compute the TF errors            */
  FrVect *output;            /* transfer function (last)                     */
  FrVect *correlation;       /* mean correaltion in the frequency domain     */
  FrVect *modulus;           /* transfer function: module (mean)             */
  FrVect *phase;             /* transfer function: phase (mean)              */
  FrVect *coherence;         /* transfer function: coherence (if optionC=YES)*/
  FrVect *errorM;            /* error on the module (if optionE=YES)         */
  FrVect *errorP;            /* error on the phase  (if optionE=YES)         */
  FrvBuf *bufferS;           /* buffer for the signal                        */
  FrvBuf *bufferR;           /* buffer for the reference                     */
  FrvRFFT *fftS;             /* fft for the signal                           */
  FrvRFFT *fftR;             /* fft for the reference                        */
  long nCall;                /* number of calls                              */
  char err[256];             /* hold error message if any                    */
};

typedef struct FrvTF FrvTF;

void   FrvTFError(FrvTF *tf);
void   FrvTFFree(FrvTF *tf);
int    FrvTFInit(FrvTF *tf, FrVect *signal, FrVect *ref);
FrvTF* FrvTFNew(char* option, int outsize, int decimate);
int    FrvTFProc(FrvTF *tf, FrVect *signal, FrVect *ref);
void   FrvTFSetDecay(FrvTF* tf, double decay);

#ifdef __cplusplus
}
#endif
#endif

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