jens
dd0f54d3bc
git-svn-id: http://moon:8086/svn/software/trunk/libsrc/iir@1 b431acfa-c32f-4a4a-93f1-934dc6c82436
69 lines
2.0 KiB
Plaintext
Executable File
69 lines
2.0 KiB
Plaintext
Executable File
/******************************************************************************/
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/******************************************************************************/
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#define pi 3.1415926535897932384626433832795
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#define IIR_FILTERTYPE_UNKNOWN 0x00000000
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#define IIR_FILTERTYPE_LOWPASS 0x00000001
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#define IIR_FILTERTYPE_HIGHPASS 0x00000002
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#define IIR_FILTERTYPE_BANDPASS 0x00000003
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#define IIR_FILTERTYPE_BANDSTOP 0x00000004
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/******************************************************************************/
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typedef struct _sComplex
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{
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double pRealData, pImagData;
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} Complex;
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class CIIRCoeff
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{
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public:
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CIIRCoeff(unsigned Na=0, unsigned Nb=0)
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{
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Init(Na, Nb);
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}
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~CIIRCoeff()
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{
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if(m_pak!=0)
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delete [] m_pak;
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if(m_pbk!=0)
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delete [] m_pbk;
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}
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void Init(unsigned Na=0, unsigned Nb=0)
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{
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m_pak= 0;
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m_pbk= 0;
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m_Na = Na;
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m_Nb = Nb;
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m_aScale = 1.0;
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m_bScale = 1.0;
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if(Na!=0)
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m_pak = new double[Na+1];
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if(Nb!=0)
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m_pbk = new double[Nb+1];
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}
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double *m_pak, m_aScale;
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unsigned m_Na;
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double *m_pbk, m_bScale;
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unsigned m_Nb;
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};
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/******************************************************************************/
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int IIRCalcPartFilterCoeff1(CIIRCoeff *pCoeff, double fg, double fa, double Qi, unsigned filterType);
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int IIRCalcPartFilterCoeff2(CIIRCoeff *pCoeff, double fg, double fa, double Qi, unsigned filterType);
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int IIRCalcFilterCoeff(double fg, double fa, double Qi, unsigned N, CIIRCoeff *pCoeff, unsigned filterType);
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double IIRBilTrans(double fg, double fa);
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double IIRCalcQp(unsigned p, unsigned N);
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unsigned IIRMulPolynom(double *pA, unsigned orderA, double *pB, unsigned orderB, double *pProduct);
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void IIR(double *xn, double *yn, CIIRCoeff *pCoeff, unsigned numPoints);
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void IIRPrintCoeff(FILE *pFile, CIIRCoeff *pCoeff, unsigned N);
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void ScaleCoeff(CIIRCoeff *pCoeff);
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double MinMag(double val1, double val2);
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double MaxMag(double val1, double val2);
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/******************************************************************************/
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