diff -r dee5afe5301f -r 3f74d0d4af4c doc/src/snippets/phonon/samplebackend/main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/doc/src/snippets/phonon/samplebackend/main.cpp	Thu Apr 08 14:19:33 2010 +0300
@@ -0,0 +1,156 @@
+/****************************************************************************
+**
+** 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 documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [snippet]
+QObject *Backend::createObject(BackendInterface::Class c, QObject *parent, const QList<QVariant> &args)
+{
+    switch (c) {
+    case MediaObjectClass:
+        return new MediaObject(parent);
+    case VolumeFaderEffectClass:
+        return new VolumeFaderEffect(parent);
+    case AudioOutputClass:
+        return new AudioOutput(parent);
+    case AudioDataOutputClass:
+        return new AudioDataOutput(parent);
+    case VisualizationClass:
+        return new Visualization(parent);
+    case VideoDataOutputClass:
+        return new VideoDataOutput(parent);
+    case EffectClass:
+        return new Effect(args[0].toInt(), parent);
+    case VideoWidgetClass:
+        return new VideoWidget(qobject_cast<QWidget *>(parent));
+    }
+    return 0;
+}
+
+QSet<int> Backend::objectDescriptionIndexes(ObjectDescriptionType type) const
+{
+    QSet<int> set;
+    switch(type)
+    {
+    case Phonon::AudioOutputDeviceType:
+        // use AudioDeviceEnumerator to list ALSA and OSS devices
+        set << 10000 << 10001;
+        break;
+    case Phonon::AudioCaptureDeviceType:
+        set << 20000 << 20001;
+        break;
+    case Phonon::VideoOutputDeviceType:
+        break;
+    case Phonon::VideoCaptureDeviceType:
+        set << 30000 << 30001;
+        break;
+    case Phonon::VisualizationType:
+    case Phonon::AudioCodecType:
+    case Phonon::VideoCodecType:
+    case Phonon::ContainerFormatType:
+        break;
+    case Phonon::EffectType:
+        set << 0x7F000001;
+        break;
+    }
+    return set;
+}
+
+QHash<QByteArray, QVariant> Backend::objectDescriptionProperties(ObjectDescriptionType type, int index) const
+{
+    QHash<QByteArray, QVariant> ret;
+    switch (type) {
+    case Phonon::AudioOutputDeviceType:
+        switch (index) {
+        case 10000:
+            ret.insert("name", QLatin1String("internal Soundcard"));
+            break;
+        case 10001:
+            ret.insert("name", QLatin1String("USB Headset"));
+            ret.insert("icon", KIcon("usb-headset"));
+            ret.insert("available", false);
+            break;
+        }
+        break;
+    case Phonon::AudioCaptureDeviceType:
+        switch (index) {
+        case 20000:
+            ret.insert("name", QLatin1String("Soundcard"));
+            ret.insert("description", QLatin1String("first description"));
+            break;
+        case 20001:
+            ret.insert("name", QLatin1String("DV"));
+            ret.insert("description", QLatin1String("second description"));
+            break;
+        }
+        break;
+    case Phonon::VideoOutputDeviceType:
+        break;
+    case Phonon::VideoCaptureDeviceType:
+        switch (index) {
+        case 30000:
+            ret.insert("name", QLatin1String("USB Webcam"));
+            ret.insert("description", QLatin1String("first description"));
+            break;
+        case 30001:
+            ret.insert("name", QLatin1String("DV"));
+            ret.insert("description", QLatin1String("second description"));
+            break;
+        }
+        break;
+    case Phonon::VisualizationType:
+        break;
+    case Phonon::AudioCodecType:
+        break;
+    case Phonon::VideoCodecType:
+        break;
+    case Phonon::ContainerFormatType:
+        break;
+    case Phonon::EffectType:
+        switch (index) {
+        case 0x7F000001:
+            ret.insert("name", QLatin1String("Delay"));
+            ret.insert("description", QLatin1String("Simple delay effect with time, feedback and level controls."));
+            break;
+        }
+        break;
+    }
+    return ret;
+}
+//! [snippet]