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+/****************************************************************************
+**
+** 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 QtMultimedia module 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qabstractvideobuffer_p.h"
+
+#include <qvariant.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QAbstractVideoBuffer
+    \brief The QAbstractVideoBuffer class is an abstraction for video data.
+    \since 4.6
+
+    The QVideoFrame class makes use of a QAbstractVideoBuffer internally to reference a buffer of
+    video data.  Creating a subclass of QAbstractVideoBuffer will allow you to construct video
+    frames from preallocated or static buffers.
+
+    The contents of a buffer can be accessed by mapping the buffer to memory using the map()
+    function which returns a pointer to memory containing the contents of the the video buffer.
+    The memory returned by map() is released by calling the unmap() function.
+
+    The handle() of a buffer may also be used to manipulate it's contents using type specific APIs.
+    The type of a buffer's handle is given by the handleType() function.
+
+    \sa QVideoFrame
+*/
+
+/*!
+    \enum QAbstractVideoBuffer::HandleType
+
+    Identifies the type of a video buffers handle.
+
+    \value NoHandle The buffer has no handle, its data can only be accessed by mapping the buffer.
+    \value GLTextureHandle The handle of the buffer is an OpenGL texture ID.
+    \value XvShmImageHandle The handle contains pointer to shared memory XVideo image.
+    \value CoreImageHandle The handle contains pointer to Mac OS X CIImage.
+    \value UserHandle Start value for user defined handle types.
+
+    \sa handleType()
+*/
+
+/*!
+    \enum QAbstractVideoBuffer::MapMode
+
+    Enumerates how a video buffer's data is mapped to memory.
+
+    \value NotMapped The video buffer has is not mapped to memory.
+    \value ReadOnly The mapped memory is populated with data from the video buffer when mapped, but
+    the content of the mapped memory may be discarded when unmapped.
+    \value WriteOnly The mapped memory in unitialized when mapped, and the content will be used to
+    populate the video buffer when unmapped.
+    \value ReadWrite The mapped memory is populated with data from the video buffer, and the
+    video buffer is repopulated with the content of the mapped memory.
+
+    \sa mapMode(), map()
+*/
+
+/*!
+    Constructs an abstract video buffer of the given \a type.
+*/
+
+QAbstractVideoBuffer::QAbstractVideoBuffer(HandleType type)
+    : d_ptr(new QAbstractVideoBufferPrivate)
+{
+    Q_D(QAbstractVideoBuffer);
+
+    d->handleType = type;
+}
+
+/*!
+    \internal
+*/
+
+QAbstractVideoBuffer::QAbstractVideoBuffer(QAbstractVideoBufferPrivate &dd, HandleType type)
+    : d_ptr(&dd)
+{
+    Q_D(QAbstractVideoBuffer);
+
+    d->handleType = type;
+}
+
+/*!
+    Destroys an abstract video buffer.
+*/
+
+QAbstractVideoBuffer::~QAbstractVideoBuffer()
+{
+    delete d_ptr;
+}
+
+/*!
+    Returns the type of a video buffer's handle.
+
+    \sa handle()
+*/
+
+QAbstractVideoBuffer::HandleType QAbstractVideoBuffer::handleType() const
+{
+    return d_func()->handleType;
+}
+
+/*!
+    \fn QAbstractVideoBuffer::mapMode() const
+
+    Returns the mode a video buffer is mapped in.
+
+    \sa map()
+*/
+
+/*!
+    \fn QAbstractVideoBuffer::map(MapMode mode, int *numBytes, int *bytesPerLine)
+
+    Maps the contents of a video buffer to memory.
+
+    The map \a mode indicates whether the contents of the mapped memory should be read from and/or
+    written to the buffer.  If the map mode includes the QAbstractVideoBuffer::ReadOnly flag the
+    mapped memory will be populated with the content of the video buffer when mapped.  If the map
+    mode includes the QAbstractVideoBuffer::WriteOnly flag the content of the mapped memory will be
+    persisted in the buffer when unmapped.
+
+    When access to the data is no longer needed be sure to call the unmap() function to release the
+    mapped memory.
+
+    Returns a pointer to the mapped memory region, or a null pointer if the mapping failed.  The
+    size in bytes of the mapped memory region is returned in \a numBytes, and the line stride in \a
+    bytesPerLine.
+
+    When access to the data is no longer needed be sure to unmap() the buffer.
+
+    \note Writing to memory that is mapped as read-only is undefined, and may result in changes
+    to shared data.
+
+    \sa unmap(), mapMode()
+*/
+
+/*!
+    \fn QAbstractVideoBuffer::unmap()
+
+    Releases the memory mapped by the map() function
+
+    If the \l {QAbstractVideoBuffer::MapMode}{MapMode} included the QAbstractVideoBuffer::WriteOnly
+    flag this will persist the current content of the mapped memory to the video frame.
+
+    \sa map()
+*/
+
+/*!
+    Returns a type specific handle to the data buffer.
+
+    The type of the handle is given by handleType() function.
+
+    \sa handleType()
+*/
+
+QVariant QAbstractVideoBuffer::handle() const
+{
+    return QVariant();
+}
+
+
+QT_END_NAMESPACE