CL/CL_CycleDetect.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_CycleDetect.h ( Clip Library, C++)
 *
 * COMMENTS:
 *
 *      Detects the most likely period of a repeating but not quite periodic
 *      waveform.
 */

#ifndef __CL_CycleDetect__
#define __CL_CycleDetect__

#include "CL_API.h"

class CL_API CL_CycleDetect
{
public:

        CL_CycleDetect(int mincyclelength = 30, int maxcyclelength = 200,
                       int cyclestouse = 2);
        ~CL_CycleDetect();

    // returns 1 if a cycle could be found, 0 otherwise.
    // start/end set to the start and end of one period of the waveform.
    // start/end should initially be the start and end of the array data (0-n)
    int         determineCycle(const float *data,int &start, int &end,
                               int straightcompare = 0);

private:

    void        trimAwaySilence(const float *data,int &start, int &end);
    void        findFlattestRegion(const float *data,int &start, int &end);
    int         findCycle(const float *data, int &start,int &end);
    void        halfCheck(const float *data, int &start, int &end,float prev);
    
    int myMaxCycle;
    int myMinCycle;
    int myNumCycles;
    
};

#endif

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