?? csensordatafilter.h
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/*
============================================================================
* Name : CSonsorDataFilter.h
* Part of : Example3D
* Description : Definition of CSensorDataFilter
* Copyright (c) 2008 Nokia Corporation
============================================================================
*/
#ifndef CSENSORDATAFILTER_H_
#define CSENSORDATAFILTER_H_
#include <e32base.h>
// Size of sensor data ring buffers for the use of moving average filter.
// Smaller value gives quicker reaction speed to the changes in the sensor data
// but also the amplitude of the random noise from the physical sensor is higher.
const TInt KSensorBufferSize = 8;
class CSensorDataFilter : public CBase
{
public:
/// Two-phased constructor
static CSensorDataFilter* NewL( TInt aRingBufferSize );
/// Destructor
~CSensorDataFilter();
private:
/// Second-phase constructor
void ConstructL();
/// Default constructor
CSensorDataFilter( TInt aRingBufferSize );
public:
/// Calculates moving average value for given ring buffer
TInt FilterSensorData( TInt aNewValue );
private:
TInt iRingBufferSize;
TInt* iRingBuffer;
TInt* iRingBufferPointer;
};
#endif /*CSENSORDATAFILTER_H_*/
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