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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef MEEGOSENSORBASE_H
#define MEEGOSENSORBASE_H
#include <qsensorbackend.h>
#include <sensormanagerinterface.h>
#include <abstractsensor_i.h>
QTM_USE_NAMESPACE
class meegosensorbase : public QSensorBackend
{
public:
meegosensorbase(QSensor *sensor);
virtual ~meegosensorbase();
protected:
virtual bool doConnect()=0;
virtual void start();
virtual void stop();
static const char* const ALWAYS_ON;
static const char* const BUFFER_SIZE;
static const char* const MAX_BUFFER_SIZE;
static const char* const EFFICIENT_BUFFER_SIZE;
static const float GRAVITY_EARTH;
static const float GRAVITY_EARTH_THOUSANDTH; //for speed
static const int KErrNotFound;
static const int KErrInUse;
void setRanges(qreal correctionFactor=1);
virtual const QString sensorName()=0;
template<typename T>
void initSensor(bool &initDone)
{
const QString name = sensorName();
if (!initDone) {
if (!m_remoteSensorManager->loadPlugin(name)){
sensorError(KErrNotFound);
return;
}
m_remoteSensorManager->registerSensorInterface<T>(name);
}
m_sensorInterface = T::controlInterface(name);
if (!m_sensorInterface) {
m_sensorInterface = const_cast<T*>(T::listenInterface(name));
}
if (!m_sensorInterface) {
sensorError(KErrNotFound);
return;
}
if (!m_sensorInterface) {
sensorError(KErrNotFound);
return;
}
initDone = true;
//metadata
QList<DataRange> intervals = m_sensorInterface->getAvailableIntervals();
for (int i=0, l=intervals.size(); i<l; i++){
qreal intervalMax = ((DataRange)(intervals.at(i))).max;
qreal intervalMin =((DataRange)(intervals.at(i))).min;
if (intervalMin==0 && intervalMax==0){
// 0 interval has different meanings in e.g. magge/acce
// magge -> best-effort
// acce -> lowest possible
// in Qt API setting 0 means default
continue;
}
qreal rateMin = intervalMax<1 ? 1 : 1/intervalMax * 1000;
rateMin = rateMin<1 ? 1 : rateMin;
intervalMin = intervalMin<1 ? 10: intervalMin; // do not divide with 0
qreal rateMax = 1/intervalMin * 1000;
addDataRate(rateMin, rateMax);
}
//bufferSizes
IntegerRangeList sizes = m_sensorInterface->getAvailableBufferSizes();
int l = sizes.size();
for (int i=0; i<l; i++){
int second = sizes.at(i).second;
m_maxBufferSize = second>m_bufferSize? second:m_maxBufferSize;
}
m_maxBufferSize = m_maxBufferSize<0?1:m_maxBufferSize;
//SensorFW guarantees to provide the most efficient size first
//TODO: remove from comments
// m_efficientBufferSize = m_sensorInterface->hwBuffering()? (l>0?sizes.at(0).first:1) : 1;
sensor()->setProperty(MAX_BUFFER_SIZE, m_maxBufferSize);
sensor()->setProperty(EFFICIENT_BUFFER_SIZE, m_efficientBufferSize);
if (sensor()->type()=="QAmbientLightSensor") return; // SensorFW returns lux values, plugin enumerated values
if (name=="accelerometersensor") return; // SensorFW returns milliGs, plugin m/s^2
if (name=="magnetometersensor") return; // SensorFW returns nanoTeslas, plugin Teslas
if (name=="gyroscopesensor") return; // SensorFW returns DSPs, plugin milliDSPs
setDescription(m_sensorInterface->description());
if (name=="tapsensor") return;
setRanges();
};
AbstractSensorChannelInterface* m_sensorInterface;
int m_bufferSize;
const int bufferSize();
virtual const qreal correctionFactor();
private:
static SensorManagerInterface* m_remoteSensorManager;
int m_prevOutputRange;
bool doConnectAfterCheck();
int m_efficientBufferSize, m_maxBufferSize;
};
#endif
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