#ifndef FRVCORR
#define FRVCORR
#ifndef _POSIX_SOURCE
#define _POSIX_SOURCE
#endif
/*---------------------------------------------------------------------------*/
/* FrvCorr.h May 31, 2001 by I. Ferrante (from Siesta file USignal.*) */
/*---------------------------------------------------------------------------*/
#include "FrameL.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct FrvCorr FrvCorr;
struct FrvCorr {
/* performs the correlation according to c_k= sum_i v1_i * v2_i+k*/
/*--------------------- input data -------------*/
int normalize; /* 0 -> unbiased 1-> biased */
int maxlag; /* maximum lag */
double * past1; /* past data vector 1 */
double * past2; /* past data vector 2 */
struct FrVect * average; /* average correlation */
struct FrVect * present; /* correlation for the present frame */
double * present0; /* pointer to zero lag present frame correlation*/
double * average0; /* pointer to zero lag average correlation */
int nCall;
char error[256];
};
void FrvCorrFree(FrvCorr* corr);
int FrvCorrProc(FrvCorr *corr, FrVect *vect1, FrVect * vect2);
int FrvCorrInit(FrvCorr *corr, FrVect *vect1, FrVect * vect2);
FrvCorr* FrvCorrNew(int maxlag, int normalize);
void FrvCorrSetPast(FrvCorr* corr, double * past1, double * past2, int flag);
#ifdef __cplusplus
}
#endif
#endif
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