add sensorfw based sensor plugin

ported from qtmobility.

Change-Id: Ia4ee6e2b7ecbc441c5f6605f1bbabfec22ddcd09
Reviewed-by: Lorn Potter <lorn.potter@jollamobile.com>

1 files changed, 189 insertions, 0 deletions

diff --git a/src/plugins/sensors/sensorfw/sensorfwsensorbase.cpp b/src/plugins/sensors/sensorfw/sensorfwsensorbase.cpp
new file mode 100644
index 00000000..85968e22
--- /dev/null
+++ b/src/plugins/sensors/sensorfw/sensorfwsensorbase.cpp
@@ -0,0 +1,189 @@
+/****************************************************************************
+**
+** 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "sensorfwsensorbase.h"
+
+
+SensorManagerInterface* SensorfwSensorBase::m_remoteSensorManager = 0;
+
+//According to wikipedia link http://en.wikipedia.org/wiki/Standard_gravity
+//const float sensorfwsensorbase::GRAVITY_EARTH = 9.812865328;
+const float SensorfwSensorBase::GRAVITY_EARTH_THOUSANDTH = 0.009812865328;
+const int SensorfwSensorBase::KErrNotFound=-1;
+const int SensorfwSensorBase::KErrInUse=-14;
+QStringList SensorfwSensorBase::m_bufferingSensors = QStringList()
+        <<"sensorfw.accelerometer"<<"sensorfw.magnetometer"
+       <<"sensorfw.gyroscope"<<"sensorfw.rotationsensor";
+
+SensorfwSensorBase::SensorfwSensorBase(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();
+}
+
+SensorfwSensorBase::~SensorfwSensorBase()
+{
+    if (m_sensorInterface) {
+        stop();
+        delete m_sensorInterface, m_sensorInterface = 0;
+    }
+}
+
+void SensorfwSensorBase::start()
+{
+    if (m_sensorInterface) {
+        // dataRate
+        QByteArray type = sensor()->type();
+        if (type != QTapSensor::type() && type != QProximitySensor::type()) {
+            int dataRate = sensor()->dataRate();
+            int interval = dataRate > 0 ? 1000 / dataRate : 0;
+            // for testing maximum speed
+            //interval = 1;
+            //dataRate = 1000;
+            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 sensorfw 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
+        bool alwaysOn = sensor()->isAlwaysOn();
+        m_sensorInterface->setStandbyOverride(alwaysOn);
+
+        // 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 SensorfwSensorBase::stop()
+{
+    if (m_sensorInterface) m_sensorInterface->stop();
+}
+
+void SensorfwSensorBase::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 SensorfwSensorBase::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 SensorfwSensorBase::bufferSize() const
+{
+    int bufferSize = sensor()->bufferSize();
+    if (bufferSize == 1)
+        return 1;
+
+    // otherwise check validit
+    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 SensorfwSensorBase::correctionFactor() const
+{
+    return 1;
+}
+