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// Internal Headers

#include "accelerometersym.h"

#include <sensrvgeneralproperties.h>

#define GRAVITATION_CONSTANT 9.812865328        //According to wikipedia link http://en.wikipedia.org/wiki/Standard_gravity

/**

 * set the id of the accelerometer sensor

 */

const char *CAccelerometerSensorSym::id("sym.accelerometer");

/**

 * Factory function, this is used to create the accelerometer object

 * @return CAccelerometerSensorSym if successful, leaves on failure

 */

CAccelerometerSensorSym* CAccelerometerSensorSym::NewL(QSensor *sensor)

    {

    CAccelerometerSensorSym* self = new (ELeave) CAccelerometerSensorSym(sensor);

    CleanupStack::PushL(self);

    self->ConstructL();

    CleanupStack::Pop();

    return self;    

    }

/**

 * Destructor

 * Closes the backend resources

 */

CAccelerometerSensorSym::~CAccelerometerSensorSym()

    {

    // Release the backend resources

    Close();

    }

/**

 * Default constructor

 */

CAccelerometerSensorSym::CAccelerometerSensorSym(QSensor *sensor):CSensorBackendSym(sensor),

        iScale(0),

        iUnit(0)

        {

        setReading<QAccelerometerReading>(&iReading);

        iBackendData.iSensorType = KSensrvChannelTypeIdAccelerometerXYZAxisData;    

        //Disable property listening

        SetListening(ETrue, EFalse);

        }

/*

 * RecvData is used to retrieve the sensor reading from sensor server

 * It is implemented here to handle accelerometer sensor specific

 * reading data and provides conversion and utility code

 */

void CAccelerometerSensorSym::RecvData(CSensrvChannel &aChannel)

    {

    TPckg<TSensrvAccelerometerAxisData> accelerometerpkg( iData );

    TInt ret = aChannel.GetData( accelerometerpkg );

    if(KErrNone != ret)

        {

        // If there is no reading available, return without setting

        return;

        }

    TReal x = iData.iAxisX;

    TReal y = iData.iAxisY;

    TReal z = iData.iAxisZ;

    //Converting unit to m/s^2

    qoutputrangelist rangeList = sensor()->outputRanges();

    TReal maxValue = rangeList[sensor()->outputRange()].maximum;

    if(iScale && iUnit == ESensevChannelUnitAcceleration)

        {

        x = (x/iScale) * maxValue;

        y = (y/iScale) * maxValue;

        z = (z/iScale) * maxValue;

        }

    else if(iUnit == ESensrvChannelUnitGravityConstant)

        {

        //conversion is yet to done

        }

    // Get a lock on the reading data

    iBackendData.iReadingLock.Wait();

    // Set qt mobility accelerometer reading with data from sensor server

    iReading.setX(x);

    iReading.setY(y);

    iReading.setZ(z);

    // Set the timestamp

    iReading.setTimestamp(iData.iTimeStamp.Int64());

    // Release the lock

    iBackendData.iReadingLock.Signal();

    }

/**

 * Second phase constructor

 * Initialize the backend resources

 */

void CAccelerometerSensorSym::ConstructL()

    {

    //Initialize the backend resources

    InitializeL(); 

    TSensrvProperty unitProperty;

    TRAPD(err, iBackendData.iSensorChannel->GetPropertyL(KSensrvPropIdChannelUnit, ESensrvSingleProperty, unitProperty));

    if(err == KErrNone)

        {

        unitProperty.GetValue(iUnit);

        }

    TSensrvProperty dataFormatProperty;

    iBackendData.iSensorChannel->GetPropertyL(KSensrvPropIdChannelDataFormat, ESensrvSingleProperty, dataFormatProperty);

    TInt dataFormat;

    dataFormatProperty.GetValue(dataFormat);

    if(dataFormat == ESensrvChannelDataFormatScaled)

        {

        TSensrvProperty scaleRangeProperty;

        TRAPD(err, iBackendData.iSensorChannel->GetPropertyL(KSensrvPropIdScaledRange, ESensrvSingleProperty, scaleRangeProperty));         //Slight confusion

        scaleRangeProperty.GetMaxValue(iScale);

        }

    }