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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtSensors module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef SENSORFWSENSORBASE_H
#define SENSORFWSENSORBASE_H
#include <qsensorbackend.h>
#include <sensormanagerinterface.h>
#include <abstractsensor_i.h>
#include <QAmbientLightSensor>
#include <QIRProximitySensor>
#include <QTapSensor>
#include <QProximitySensor>
class SensorfwSensorBase : public QSensorBackend
{
public:
SensorfwSensorBase(QSensor *sensor);
virtual ~SensorfwSensorBase();
protected:
virtual bool doConnect()=0;
virtual void start();
virtual void stop();
static const float GRAVITY_EARTH;
static const float GRAVITY_EARTH_THOUSANDTH; //for speed
static const int KErrNotFound;
static const int KErrInUse;
static QStringList m_bufferingSensors;
void setRanges(qreal correctionFactor=1);
virtual QString sensorName() const=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
if (m_bufferingSensors.contains(sensor()->identifier())) {
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;
}
else
m_maxBufferSize = 1;
sensor()->setMaxBufferSize(m_maxBufferSize);
sensor()->setEfficientBufferSize(m_efficientBufferSize);
QByteArray type = sensor()->type();
if (type == QAmbientLightSensor::type) return; // SensorFW returns lux values, plugin enumerated values
if (type == QIRProximitySensor::type) return; // SensorFW returns raw reflectance values, plugin % of max reflectance
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;
int bufferSize() const;
virtual qreal correctionFactor() const;
private:
static SensorManagerInterface* m_remoteSensorManager;
int m_prevOutputRange;
bool doConnectAfterCheck();
int m_efficientBufferSize, m_maxBufferSize;
};
#endif
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