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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 Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "meegosensorbase.h"
SensorManagerInterface* meegosensorbase::m_remoteSensorManager = 0;
//According to wikipedia link http://en.wikipedia.org/wiki/Standard_gravity
//const float meegosensorbase::GRAVITY_EARTH = 9.812865328;
const float meegosensorbase::GRAVITY_EARTH_THOUSANDTH = 0.009812865328;
const int meegosensorbase::KErrNotFound=-1;
const int meegosensorbase::KErrInUse=-14;
const char* const meegosensorbase::ALWAYS_ON = "alwaysOn";
const char* const meegosensorbase::BUFFER_SIZE = "bufferSize";
const char* const meegosensorbase::MAX_BUFFER_SIZE = "maxBufferSize";
const char* const meegosensorbase::EFFICIENT_BUFFER_SIZE = "efficientBufferSize";
QStringList meegosensorbase::m_bufferingSensors = QStringList()<<"meego.accelerometer"<<"meego.magnetometer"<<"meego.gyroscope"<<"meego.rotationsensor";
meegosensorbase::meegosensorbase(QSensor *sensor)
: QSensorBackend(sensor), m_sensorInterface(0), m_bufferSize(-1), m_prevOutputRange(0), m_efficientBufferSize(1), m_maxBufferSize(1)
{
if (!m_remoteSensorManager)
m_remoteSensorManager = &SensorManagerInterface::instance();
}
meegosensorbase::~meegosensorbase()
{
if (m_sensorInterface) {
stop();
QObject::disconnect(m_sensorInterface);
delete m_sensorInterface, m_sensorInterface = 0;
}
}
void meegosensorbase::start()
{
if (m_sensorInterface) {
// dataRate
QString type = sensor()->type();
if (type!="QTapSensor" && type!="QProximitySensor"){
int dataRate = sensor()->dataRate();
int interval = dataRate>0 ? 1000 / dataRate : 0;
// for testing maximum speed
//interval = 1;
//dataRate = 1000;
qDebug() << "Setting data rate" << dataRate << "Hz (interval" << interval << "ms) for" << sensor()->identifier();
m_sensorInterface->setInterval(interval);
}
// outputRange
int currentRange = sensor()->outputRange();
int l = sensor()->outputRanges().size();
if (l>1){
if (currentRange != m_prevOutputRange){
#ifdef Q_WS_MAEMO_6
bool isOk = m_sensorInterface->setDataRangeIndex(currentRange); //NOTE THAT THE CHANGE MIGHT NOT SUCCEED, FIRST COME FIRST SERVED
if (!isOk) sensorError(KErrInUse);
else m_prevOutputRange = currentRange;
#else
// TODO: remove when sensord integrated, in MeeGo env there is a delay
qoutputrange range = sensor()->outputRanges().at(currentRange);
qreal correction = 1/correctionFactor();
DataRange range1(range.minimum*correction, range.maximum*correction, range.accuracy*correction);
m_sensorInterface->requestDataRange(range1);
m_prevOutputRange = currentRange;
#endif
}
}
// always on
QVariant alwaysOn = sensor()->property(ALWAYS_ON);
alwaysOn.isValid()?
m_sensorInterface->setStandbyOverride(alwaysOn.toBool()):
m_sensorInterface->setStandbyOverride(false);
// connects after buffering checks
doConnectAfterCheck();
int returnCode = m_sensorInterface->start().error().type();
if (returnCode==0) return;
qWarning()<<"m_sensorInterface did not start, error code:"<<returnCode;
}
sensorStopped();
}
void meegosensorbase::stop()
{
if (m_sensorInterface) m_sensorInterface->stop();
}
void meegosensorbase::setRanges(qreal correctionFactor){
if (!m_sensorInterface) return;
QList<DataRange> ranges = m_sensorInterface->getAvailableDataRanges();
for (int i=0, l=ranges.size(); i<l; i++){
DataRange range = ranges.at(i);
qreal rangeMin = range.min * correctionFactor;
qreal rangeMax = range.max * correctionFactor;
qreal resolution = range.resolution * correctionFactor;
addOutputRange(rangeMin, rangeMax, resolution);
}
}
bool meegosensorbase::doConnectAfterCheck(){
if (!m_sensorInterface) return false;
// buffer size
int size = bufferSize();
if (size == m_bufferSize) return true;
if (m_bufferingSensors.contains(sensor()->identifier()))
m_sensorInterface->setBufferSize(size);
else size = 1;
// if multiple->single or single->multiple or if uninitialized
if ((m_bufferSize>1 && size==1) || (m_bufferSize==1 && size>1) || m_bufferSize==-1){
m_bufferSize = size;
disconnect(this);
if (!doConnect()){
qWarning() << "Unable to connect "<< sensorName();
return false;
}
return true;
}
m_bufferSize = size;
return true;
}
int meegosensorbase::bufferSize() const{
QVariant bufferVariant = sensor()->property(BUFFER_SIZE);
int bufferSize = bufferVariant.isValid()?bufferVariant.toInt():1;
if (bufferSize==1) return 1;
// otherwise check validity
if (bufferSize<1){
qWarning()<<"bufferSize cannot be "<<bufferSize<<", must be a positive number >= 1";
return 1;
}
if (bufferSize>m_maxBufferSize){
qWarning()<<"bufferSize cannot be "<<bufferSize<<", MAX value is "<<m_maxBufferSize;
return m_maxBufferSize;
}
return bufferSize;
}
qreal meegosensorbase::correctionFactor() const{return 1;}
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