CL/CL_Filter.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * Produced by:
 *      Mark Alexander
 *      Side Effects Software Inc
 *      477 Richmond Street West
 *      Toronto, Ontario
 *      Canada   M5V 3E7
 *      416-504-9876
 *
 * NAME:        CL_Filter.h ( Clip Library, C++)
 *
 * COMMENTS:
 *      Does continuous digital filtering
 *
 */


#ifndef __CL_Filter__
#define __CL_Filter__

#include "CL_API.h"
#include "CL_SlidingWindow.h"

class UT_FFT;
class UT_IStream;

class CL_API CL_Filter : public CL_SlidingWindow
{
public:

                         CL_Filter(int size, int overlap);
                         CL_Filter(UT_IStream &is);
    virtual             ~CL_Filter();

    // must be 'size' floats long.
    void                setFilter(float *filter,float *phase = 0);
    
    virtual void        reset(float val = 0.0F);
    virtual int         maxFilterSamples();

private:
    virtual void doWindowOp(int nsamples, float *dest);

    // Should only be called from the constructor
    void        initialize();

    void        window(float *windower);
    void        filter();
    void        computeWindow();

    float        myLastDataSample;
    float        myLastSlope;
    
    float       *myData;
    float       *myReal, * myImag;
    float       *myFilter;
    float       *myPhaseFilter;

    float       *myWindow;
    float       *myUnWindow;

    UT_FFT      *myTransform;
    
};

#endif

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