IIRFilter.h

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/*
 * Copyright (C) 2013 David McGriffy, all rights reserved
 */

#ifndef IIRFILTER_H_INCLUDED
#define IIRFILTER_H_INCLUDED

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include "Filter.h"
#include "FilterCoefficients.h"

class CIIRFilter : public CFilter
{
public:
    CIIRFilter();               
    CIIRFilter(int form);       
    ~CIIRFilter();              
    void SetXML(CXMLElement *xml);                      
    void setCoefficients(CFilterCoefficients *coef);    
    void setSamplingRate(float sr);                     
    bool canProcess();                                  
    void doFilter(float *node, long sampleFrames);      
    void clearBuffers();                                
    void setCoefficientFileName(long sr, char *fileName);   
protected:
    void init();

    int m_nForm;

    // filter buffers and such
    CFilterCoefficients *m_coefficients;
    int m_nFiltSizeA;
    int m_nFiltSizeB;

    float m_fInBuffer [MAXFILTSIZE];
    float m_fOutBuffer [MAXFILTSIZE];
    short   m_nBufPos;

    float *m_fACoefficients;
    float *m_fBCoefficients;

    float m_fScale;
};

#endif