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.
 *
 * 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 <UT/UT_NonCopyable.h>
#include <SYS/SYS_Types.h>

class UT_IStream;
class UT_OStream;

class CL_API CL_SlidingWindow
{
public:

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

                 UT_NON_COPYABLE(CL_SlidingWindow)

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

    virtual void        reset(fpreal val = 0.0);
    virtual int         maxFilterSamples();

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

private:

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

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

#endif