#ifndef MMS24_25_H_
#define MMS24_25_H_

typedef struct {
        int iNumLocalExtrema;
        int *piLocalExtremaPos;
} LocalExtrema;

typedef struct {
        int iGlobalMinPos;
        int iGlobalMaxPos;
        LocalExtrema *pexLocalMax;
        LocalExtrema *pexLocalMin;
} Extrema;

typedef struct {
  double *pdValues;
  int iNumValues;
  double dArea;
  double dMean;
  double dStdDev;
  double dMedian;
  Extrema *pexExtrema;
} MMSignal;

typedef struct {
	double dIntervalMin;
	double dIntervalMax;
	double dBinWidth;
	int iNumBins;
	double *pdBinValues;
} Histogram;

/***************************
*  AUFGABE 1
****************************/

double interpolateLine(double dX1,double dY1,double dX2, double dY2, double dXq);
void rescaleDoubleArray(double *pdIn, int iLen, double dMin, double dFactor, double *pdOut);
double *generateSineValues(int iNumValues, int iNumSamplesPerPeriod, double dAmp);
void writeDoubleArray(double *pdOut, int iLen, char *pcOutName);

/**************************************
* read a linebreak separated numbers from a file
*
* input:
*       pcInName - Name of the file to be read
*       ppdIn - pointer holding the reference to the data array created by this function after reading
*
* output:
*       Length of the array of double values created by this function
*
***************************************/
int readDoubleArray(char *pcInName, double **ppdIn);

MMSignal *createSignal();
MMSignal *createSignalFromSignal(MMSignal *pmmsIn);
MMSignal *createSignalWithDefault(int iArrayLen, double dDefaultValue);
MMSignal *createSignalFromDoubleArray(int iArrayLen, double *pdIn);
MMSignal *createSignalFromFile(char *pcInName);
void writeMMSignal(char *pcInName, MMSignal *pmmsIn);

void deleteSignal(MMSignal *pmmsIn);

/********************************
* AUFGABE 2
********************************/

double calculateArea(double *pdIn, int iLen);
double calculateMean(double *pdIn, int iLen);
double calculateStddev(double *pdIn, int iLen);
double calculateMedian(double *pdIn, int iLen);
Extrema *initExtrema(double *pdIn, int iLen);
void deleteExtrema(Extrema *pexIn);
void initMMSignalFeatures(MMSignal *pmmsIn);

Histogram *initHistogram(double *pdIn, int iLen, int iNumBins);
void deleteHistogram(Histogram *phisIn);
double calculateEntropy(Histogram *phisIn);

/********************************
* AUFGABE 3
********************************/
MMSignal *convoluteSignals(MMSignal *pmmsInA,MMSignal *pmmsInB);
MMSignal *getPascalLine(int iLinenum);

/********************************
* AUFGABE 4
********************************/
void computeDFT(int iLen,
		double *pdRealIn, double *pdImgIn,
		double *pdRealOut, double *pdImgOut,
		int iDirection /*-1,1*/);
void convertCart2Polar(double *pdRealIn, double *pdImgIn, double *pdRadiusOut, double *pdAngleOut, int iLen);
void convertPolar2Cart(double *pdRadiusIn, double *pdAngleIn, double *pdRealOut, double *pdImgOut, int iLen);
#endif