--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/qtmobility/src/multimedia/audio/qaudiosystemplugin.cpp	Wed Jun 23 19:08:38 2010 +0300
@@ -0,0 +1,135 @@
+/****************************************************************************
+**
+** 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 Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+
+#include "qaudiosystemplugin.h"
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QAudioSystemPlugin
+    \brief The QAudioSystemPlugin class provides an abstract base for audio plugins.
+
+    \ingroup multimedia
+    \inmodule QtMultimedia
+    \internal
+
+    Writing a audio plugin is achieved by subclassing this base class,
+    reimplementing the pure virtual functions keys(), availableDevices(),
+    createInput(), createOutput() and createDeviceInfo() then exporting
+    the class with the Q_EXPORT_PLUGIN2() macro.
+
+    Unit tests are available to help in debugging new plugins.
+
+    \sa QAbstractAudioDeviceInfo, QAbstractAudioOutput, QAbstractAudioInput
+
+    Qt supports win32, linux(alsa) and Mac OS X standard (builtin to the
+    QtMultimedia library at compile time).
+
+    You can support other backends other than these predefined ones by
+    creating a plugin subclassing QAudioSystemPlugin, QAbstractAudioDeviceInfo,
+    QAbstractAudioOutput and QAbstractAudioInput.
+
+    Add "default" to your list of keys() available to override the default
+    audio device to be provided by your plugin.
+
+    -audio-backend configure option will force compiling in of the builtin backend
+    into the QtMultimedia library at compile time. This is automatic by default
+    and will only be compiled into the library if the dependencies are installed.
+    eg. alsa-devel package installed for linux.
+
+    If the builtin backend is not compiled into the QtMultimedia library and
+    no audio plugins are available a fallback dummy backend will be used.
+    This should print out warnings if this is the case when you try and use QAudioInput or QAudioOutput. To fix this problem
+    reconfigure Qt using -audio-backend or create your own plugin with a default
+    key to always override the dummy fallback. The easiest way to determine
+    if you have only a dummy backend is to get a list of available audio devices.
+
+    QAudioDeviceInfo::availableDevices(QAudio::AudioOutput).size() = 0 (dummy backend)
+*/
+
+/*!
+    Construct a new audio plugin with \a parent.
+    This is invoked automatically by the Q_EXPORT_PLUGIN2() macro.
+*/
+
+QAudioSystemPlugin::QAudioSystemPlugin(QObject* parent) :
+    QObject(parent)
+{}
+
+/*!
+   Destroy the audio plugin
+
+   You never have to call this explicitly. Qt destroys a plugin automatically when it is no longer used.
+*/
+
+QAudioSystemPlugin::~QAudioSystemPlugin()
+{}
+
+/*!
+    \fn QStringList QAudioSystemPlugin::keys() const
+    Returns the list of device identifiers this plugin supports.
+*/
+
+/*!
+    \fn QList<QByteArray> QAudioSystemPlugin::availableDevices(QAudio::Mode mode) const
+    Returns a list of available audio devices for \a mode
+*/
+
+/*!
+    \fn QAbstractAudioInput* QAudioSystemPlugin::createInput(const QByteArray& device)
+    Returns a pointer to a QAbstractAudioInput created using \a device identifier
+*/
+
+/*!
+    \fn QAbstractAudioOutput* QAudioSystemPlugin::createOutput(const QByteArray& device)
+    Returns a pointer to a QAbstractAudioOutput created using \a device identifier
+
+*/
+
+/*!
+    \fn QAbstractAudioDeviceInfo* QAudioSystemPlugin::createDeviceInfo(const QByteArray& device, QAudio::Mode mode)
+    Returns a pointer to a QAbstractAudioDeviceInfo created using \a device and \a mode
+
+*/
+
+
+QT_END_NAMESPACE