Add qmlvideo and qmlvideofx examples

Based on code imported from master branch of QtMobility repo,
ported to Qt Quick 2.

Task-number: QTBUG-23118
Change-Id: Ifd297de0e595c675ff1a8e3218d91b03629295b9
Reviewed-by: Jonas Rabbe <jonas.rabbe@nokia.com>
Reviewed-by: Michael Goddard <michael.goddard@nokia.com>

examples/video/snippets/frequencymonitor/frequencymonitor.cpp

@@ -0,0 +1,250 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 "frequencymonitor.h"
+#include <QtCore/QDebug>
+#include <QtCore/QElapsedTimer>
+#include <QtCore/QString>
+#include <QtCore/QTime>
+#include <QtCore/QTimer>
+
+//#define VERBOSE_TRACE
+
+inline QDebug qtTrace() { return qDebug() << "[frequencymonitor]"; }
+#ifdef VERBOSE_TRACE
+inline QDebug qtVerboseTrace() { return qtTrace(); }
+#else
+inline QNoDebug qtVerboseTrace() { return QNoDebug(); }
+#endif
+
+static const int DefaultSamplingInterval = 100;
+static const int DefaultTraceInterval = 0;
+
+class FrequencyMonitorPrivate : public QObject
+{
+    Q_OBJECT
+public:
+    FrequencyMonitorPrivate(FrequencyMonitor *parent);
+    void calculateInstantaneousFrequency();
+
+private slots:
+    void calculateAverageFrequency();
+    void stalled();
+
+public:
+    FrequencyMonitor *const q_ptr;
+    QString m_label;
+    bool m_active;
+    qreal m_instantaneousFrequency;
+    QElapsedTimer m_instantaneousElapsed;
+    QTimer *m_averageTimer;
+    QElapsedTimer m_averageElapsed;
+    int m_count;
+    qreal m_averageFrequency;
+    QTimer *m_traceTimer;
+    QTimer *m_stalledTimer;
+};
+
+FrequencyMonitorPrivate::FrequencyMonitorPrivate(FrequencyMonitor *parent)
+:   QObject(parent)
+,   q_ptr(parent)
+,   m_active(false)
+,   m_instantaneousFrequency(0)
+,   m_averageTimer(new QTimer(this))
+,   m_count(0)
+,   m_averageFrequency(0)
+,   m_traceTimer(new QTimer(this))
+,   m_stalledTimer(new QTimer(this))
+{
+    m_instantaneousElapsed.start();
+    connect(m_averageTimer, SIGNAL(timeout()),
+            this, SLOT(calculateAverageFrequency()));
+    if (DefaultSamplingInterval)
+        m_averageTimer->start(DefaultSamplingInterval);
+    m_averageElapsed.start();
+    connect(m_traceTimer, SIGNAL(timeout()),
+            q_ptr, SLOT(trace()));
+    if (DefaultTraceInterval)
+        m_traceTimer->start(DefaultTraceInterval);
+    m_stalledTimer->setSingleShot(true);
+    connect(m_stalledTimer, SIGNAL(timeout()),
+            this, SLOT(stalled()));
+}
+
+void FrequencyMonitorPrivate::calculateInstantaneousFrequency()
+{
+    const qint64 ms = m_instantaneousElapsed.restart();
+    m_instantaneousFrequency = ms ? qreal(1000) / ms : 0;
+    m_stalledTimer->start(3 * ms);
+    if (m_instantaneousFrequency)
+        q_ptr->setActive(true);
+    q_ptr->emit instantaneousFrequencyChanged(m_instantaneousFrequency);
+    q_ptr->emit frequencyChanged();
+}
+
+void FrequencyMonitorPrivate::calculateAverageFrequency()
+{
+    const qint64 ms = m_averageElapsed.restart();
+    m_averageFrequency = qreal(m_count * 1000) / ms;
+    q_ptr->emit averageFrequencyChanged(m_averageFrequency);
+    q_ptr->emit frequencyChanged();
+    m_count = 0;
+}
+
+void FrequencyMonitorPrivate::stalled()
+{
+    if (m_instantaneousFrequency) {
+        qtVerboseTrace() << "FrequencyMonitor::stalled";
+        m_instantaneousFrequency = 0;
+        q_ptr->emit instantaneousFrequencyChanged(m_instantaneousFrequency);
+        q_ptr->emit frequencyChanged();
+    }
+}
+
+FrequencyMonitor::FrequencyMonitor(QObject *parent)
+:   QObject(parent)
+,   d_ptr(0)
+{
+    d_ptr = new FrequencyMonitorPrivate(this);
+    qtTrace() << "FrequencyMonitor::FrequencyMonitor";
+}
+
+FrequencyMonitor::~FrequencyMonitor()
+{
+
+}
+
+const QString &FrequencyMonitor::label() const
+{
+    return d_func()->m_label;
+}
+
+bool FrequencyMonitor::active() const
+{
+    return d_func()->m_active;
+}
+
+int FrequencyMonitor::samplingInterval() const
+{
+    return d_ptr->m_averageTimer->isActive() ? d_ptr->m_averageTimer->interval() : 0;
+}
+
+int FrequencyMonitor::traceInterval() const
+{
+    return d_ptr->m_traceTimer->isActive() ? d_ptr->m_traceTimer->interval() : 0;
+}
+
+qreal FrequencyMonitor::instantaneousFrequency() const
+{
+    return d_func()->m_instantaneousFrequency;
+}
+
+qreal FrequencyMonitor::averageFrequency() const
+{
+    return d_func()->m_averageFrequency;
+}
+
+void FrequencyMonitor::notify()
+{
+    Q_D(FrequencyMonitor);
+    ++(d->m_count);
+    d->calculateInstantaneousFrequency();
+}
+
+void FrequencyMonitor::trace()
+{
+    Q_D(FrequencyMonitor);
+    const QString value = QString::fromAscii("instant %1 average %2")
+                            .arg(d->m_instantaneousFrequency, 0, 'f', 2)
+                            .arg(d->m_averageFrequency, 0, 'f', 2);
+    if (d->m_label.isEmpty())
+        qtTrace() << "FrequencyMonitor::trace" << value;
+    else
+        qtTrace() << "FrequencyMonitor::trace" << "label" << d->m_label << value;
+}
+
+void FrequencyMonitor::setLabel(const QString &value)
+{
+    Q_D(FrequencyMonitor);
+    if (d->m_label != value) {
+        d->m_label = value;
+        emit labelChanged(d->m_label);
+    }
+}
+
+void FrequencyMonitor::setActive(bool value)
+{
+    Q_D(FrequencyMonitor);
+    if (d->m_active != value) {
+        d->m_active = value;
+        emit activeChanged(d->m_active);
+    }
+}
+
+void FrequencyMonitor::setSamplingInterval(int value)
+{
+    Q_D(FrequencyMonitor);
+    if (samplingInterval() != value) {
+        if (value) {
+            d->m_averageTimer->setInterval(value);
+            d->m_averageTimer->start();
+        } else {
+            d->m_averageTimer->stop();
+        }
+        emit samplingIntervalChanged(value);
+    }
+}
+
+void FrequencyMonitor::setTraceInterval(int value)
+{
+    Q_D(FrequencyMonitor);
+    if (traceInterval() != value) {
+        if (value) {
+            d->m_traceTimer->setInterval(value);
+            d->m_traceTimer->start();
+        } else {
+            d->m_traceTimer->stop();
+        }
+        emit traceIntervalChanged(value);
+    }
+}
+
+#include "frequencymonitor.moc"

examples/video/snippets/frequencymonitor/frequencymonitor.h

@@ -0,0 +1,102 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef FREQUENCYMONITOR_H
+#define FREQUENCYMONITOR_H
+
+#include <QtCore/QObject>
+
+class QTimer;
+
+class FrequencyMonitorPrivate;
+
+/**
+ * Class for measuring frequency of events
+ *
+ * Occurrence of the event is notified by the client via the notify() slot.
+ * On a regular interval, both an instantaneous and a rolling average
+ * event frequency are calculated.
+ */
+class FrequencyMonitor : public QObject
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(FrequencyMonitor)
+    Q_PROPERTY(QString label READ label WRITE setLabel NOTIFY labelChanged)
+    Q_PROPERTY(bool active READ active WRITE setActive NOTIFY activeChanged)
+    Q_PROPERTY(int samplingInterval READ samplingInterval WRITE setSamplingInterval NOTIFY samplingIntervalChanged)
+    Q_PROPERTY(int traceInterval READ traceInterval WRITE setTraceInterval NOTIFY traceIntervalChanged)
+    Q_PROPERTY(qreal instantaneousFrequency READ instantaneousFrequency NOTIFY instantaneousFrequencyChanged)
+    Q_PROPERTY(qreal averageFrequency READ averageFrequency NOTIFY averageFrequencyChanged)
+public:
+    FrequencyMonitor(QObject *parent = 0);
+    ~FrequencyMonitor();
+
+    static void qmlRegisterType();
+
+    const QString &label() const;
+    bool active() const;
+    int samplingInterval() const;
+    int traceInterval() const;
+    qreal instantaneousFrequency() const;
+    qreal averageFrequency() const;
+
+signals:
+    void labelChanged(const QString &value);
+    void activeChanged(bool);
+    void samplingIntervalChanged(int value);
+    void traceIntervalChanged(int value);
+    void frequencyChanged();
+    void instantaneousFrequencyChanged(qreal value);
+    void averageFrequencyChanged(qreal value);
+
+public slots:
+    Q_INVOKABLE void notify();
+    Q_INVOKABLE void trace();
+    void setActive(bool value);
+    void setLabel(const QString &value);
+    void setSamplingInterval(int value);
+    void setTraceInterval(int value);
+
+private:
+    FrequencyMonitorPrivate *d_ptr;
+};
+
+#endif // FREQUENCYMONITOR_H

examples/video/snippets/frequencymonitor/frequencymonitor.pri

@@ -0,0 +1,6 @@
+HEADERS += $$PWD/frequencymonitor.h
+SOURCES += $$PWD/frequencymonitor.cpp
+INCLUDEPATH += $$PWD
+DEFINES += FREQUENCYMONITOR_SUPPORT
+message("frequencymonitor.pri loaded")
+

examples/video/snippets/frequencymonitor/frequencymonitordeclarative.cpp

@@ -0,0 +1,48 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 "frequencymonitor.h"
+#include <QtDeclarative/qdeclarative.h>
+
+void FrequencyMonitor::qmlRegisterType()
+{
+    ::qmlRegisterType<FrequencyMonitor>("FrequencyMonitor", 1, 0, "FrequencyMonitor");
+}

examples/video/snippets/frequencymonitor/frequencymonitordeclarative.pri

@@ -0,0 +1,17 @@
+include($$PWD/frequencymonitor.pri)
+QT += declarative
+SOURCES += $$PWD/frequencymonitordeclarative.cpp
+
+defineTest(frequencyItemAddDeployment) {
+    symbian: frequencyitem_folder.source = $$PWD/$$SNIPPETS_PATH/frequencymonitor/qml/frequencymonitor
+    else: frequencyitem_folder.source = $$SNIPPETS_PATH/frequencymonitor/qml/frequencymonitor
+    frequencyitem_folder.target = qml
+    DEPLOYMENTFOLDERS += frequencyitem_folder
+
+    export(frequencyitem_folder.source)
+    export(frequencyitem_folder.target)
+    export(DEPLOYMENTFOLDERS)
+}
+
+message("frequencymonitordeclarative.pri loaded")
+

examples/video/snippets/frequencymonitor/qml/frequencymonitor/FrequencyItem.qml

@@ -0,0 +1,103 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+import FrequencyMonitor 1.0
+
+Rectangle {
+    id: root
+    property bool logging: true
+    property bool displayed: true
+    property bool enabled: logging || displayed
+    property alias active: monitor.active
+    property int samplingInterval: 500
+    property color textColor: "yellow"
+    property int textSize: 20
+    property alias label: monitor.label
+
+    border.width: 1
+    border.color: "yellow"
+    width: 3.5 * root.textSize
+    height: 3.0 * root.textSize
+    color: "black"
+    opacity: 0.5
+    radius: 10
+    visible: displayed && active
+
+    // This should ensure that the monitor is on top of all other content
+    z: 999
+
+    function notify() {
+        monitor.notify()
+    }
+
+    FrequencyMonitor {
+        id: monitor
+        samplingInterval: root.enabled ? root.samplingInterval : 0
+        onAverageFrequencyChanged: {
+            if (root.logging) trace()
+            instantaneousFrequencyText.text = monitor.instantaneousFrequency.toFixed(2)
+            averageFrequencyText.text = monitor.averageFrequency.toFixed(2)
+        }
+    }
+
+    Text {
+        id: instantaneousFrequencyText
+        anchors {
+            right: parent.right
+            top: parent.top
+            margins: 10
+        }
+        color: root.textColor
+        font.pixelSize: root.textSize
+    }
+
+    Text {
+        id: averageFrequencyText
+        anchors {
+            right: parent.right
+            bottom: parent.bottom
+            margins: 10
+        }
+        color: root.textColor
+        font.pixelSize: root.textSize
+    }
+}

examples/video/snippets/performancemonitor/performancemonitor.cpp

@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 "performancemonitor.h"
+#include <QtCore/QString>
+
+namespace PerformanceMonitor {
+
+    bool parseArgument(const QString &arg, State &state)
+    {
+        bool result = false;
+        if ("-log-perf" == arg) {
+            state.logging = true;
+            state.valid = true;
+            result = true;
+        } else if ("-no-log-perf" == arg) {
+            state.logging = false;
+            state.valid = true;
+            result = true;
+        } else if ("-show-perf" == arg) {
+            state.visible = true;
+            state.valid = true;
+            result = true;
+        } else if ("-hide-perf" == arg) {
+            state.visible = false;
+            state.valid = true;
+            result = true;
+        }
+        return result;
+    }
+
+}

examples/video/snippets/performancemonitor/performancemonitor.h

@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PERFORMANCEMONITOR_H
+#define PERFORMANCEMONITOR_H
+
+class QString;
+
+namespace PerformanceMonitor {
+    struct State {
+        bool valid;
+        bool logging;
+        bool visible;
+
+        State() : valid(true), logging(false), visible(true) { }
+        State(bool l, bool v) : valid(true), logging(l), visible(v) { }
+        bool operator==(const State &other) const
+        { return logging == other.logging && visible == other.visible; }
+        bool operator!=(const State &other) const
+        { return logging != other.logging || visible != other.visible; }
+    };
+
+    bool parseArgument(const QString &arg, State &state);
+}
+
+#endif // PERFORMANCEMONITOR_H
+

examples/video/snippets/performancemonitor/performancemonitor.pri

@@ -0,0 +1,7 @@
+INCLUDEPATH += $$PWD
+HEADERS += $$PWD/performancemonitor.h
+SOURCES += $$PWD/performancemonitor.cpp
+DEFINES += PERFORMANCEMONITOR_SUPPORT
+
+message("performancemonitor.pri loaded")
+

examples/video/snippets/performancemonitor/performancemonitordeclarative.cpp

@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 "frequencymonitor.h"
+#include "performancemonitor.h"
+
+namespace PerformanceMonitor {
+
+    void qmlRegisterTypes()
+    {
+        FrequencyMonitor::qmlRegisterType();
+    }
+}

examples/video/snippets/performancemonitor/performancemonitordeclarative.h

@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PERFORMANCEMONITORDECLARATIVE_H
+#define PERFORMANCEMONITORDECLARATIVE_H
+
+#include "performancemonitor.h"
+
+namespace PerformanceMonitor {
+    void qmlRegisterTypes();
+}
+
+#endif // PERFORMANCEMONITORDECLARATIVE_H

examples/video/snippets/performancemonitor/performancemonitordeclarative.pri

@@ -0,0 +1,22 @@
+include($$PWD/../frequencymonitor/frequencymonitordeclarative.pri)
+include($$PWD/performancemonitor.pri)
+
+HEADERS += $$PWD/performancemonitordeclarative.h
+SOURCES += $$PWD/performancemonitordeclarative.cpp
+
+PERFORMANCE_ROOT = $$PWD
+
+defineTest(performanceItemAddDeployment) {
+    frequencyItemAddDeployment()
+
+    symbian: performanceitem_folder.source = $$PWD/$$SNIPPETS_PATH/performancemonitor/qml/performancemonitor
+    else: performanceitem_folder.source = $$SNIPPETS_PATH/performancemonitor/qml/performancemonitor
+    performanceitem_folder.target = qml
+    DEPLOYMENTFOLDERS += performanceitem_folder
+
+    export(performanceitem_folder.source)
+    export(performanceitem_folder.target)
+    export(DEPLOYMENTFOLDERS)
+}
+
+message("performancemonitordeclarative.pri loaded")

examples/video/snippets/performancemonitor/qml/performancemonitor/PerformanceItem.qml

@@ -0,0 +1,110 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.0
+
+Rectangle {
+    id: root
+    property bool logging: true
+    property bool displayed: true
+    property bool videoActive
+    property int samplingInterval: 500
+    property color textColor: "yellow"
+    property int textSize: 28
+    property int margins: 5
+
+    color: "transparent"
+
+    // This should ensure that the monitor is on top of all other content
+    z: 999
+
+    Loader {
+        id: videoFrameRateItemLoader
+        function init() {
+            source = "../frequencymonitor/FrequencyItem.qml"
+            item.label = "videoFrameRate"
+            item.parent = root
+            item.anchors.left = root.left
+            item.anchors.top = root.top
+            item.anchors.margins = root.margins
+            item.logging = root.logging
+            item.displayed = root.displayed
+            videoFrameRateActiveConnections.target = item
+        }
+
+        Connections {
+            id: videoFrameRateActiveConnections
+            ignoreUnknownSignals: true
+            onActiveChanged: root.videoActive = videoFrameRateActiveConnections.target.active
+        }
+    }
+
+    Loader {
+        id: qmlFrameRateItemLoader
+        function init() {
+            source = "../frequencymonitor/FrequencyItem.qml"
+            item.label = "qmlFrameRate"
+            item.parent = root
+            item.anchors.left = root.left
+            item.anchors.bottom = root.bottom
+            item.anchors.margins = root.margins
+            item.logging = root.logging
+            item.displayed = root.displayed
+        }
+    }
+
+    function init() {
+        videoFrameRateItemLoader.init()
+        qmlFrameRateItemLoader.init()
+    }
+
+    function videoFramePainted() {
+        videoFrameRateItemLoader.item.notify()
+    }
+
+    function qmlFramePainted() {
+        qmlFrameRateItemLoader.item.notify()
+    }
+
+    onVideoActiveChanged: {
+        videoFrameRateItemLoader.item.active = root.videoActive
+    }
+}