CL/CL_SlidingWindow.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_SlidingWindow.h ( Clip Library, C++)
 *
 * COMMENTS:
 *      Implements a queue-style sliding window for continuous windowed
 *      operations
 *
 */


#ifndef __CL_SlidingWindow__
#define __CL_SlidingWindow__

#include "CL_API.h"
#include <iostream.h>

class UT_IStream;

class CL_API CL_SlidingWindow
{
public:

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

    void         filterSamples(int n,const float *source,float *dest);
    void         shiftSamples(int nsource, const float *source,
                              int ndest, float *dest, int shift);
    
    void                setOverlap(int overlap);
    void                resize(int size, int preserve = 0);

    virtual void        reset(float val = 0.0F);
    virtual int         maxFilterSamples();

    virtual void        save(ostream &os, int binary);
    virtual bool        load(UT_IStream &is, int version);

private:

    // override this function to do the operation you want
    virtual void        doWindowOp(int nsamples,float *dest);
    virtual void        doShiftOp(int nsamples,const float *source,int nshift);

protected:
    int          myWindowSize;
    int          myOverlap;
    int          myLastFilteredSample;
    
    float       *myPreviousData;
    float       *myMirrorData;
};

#endif

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