/****************************************************************************

**

** 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 "qmemoryvideobuffer_p.h"

#include "qabstractvideobuffer_p.h"

#include <qbytearray.h>

QT_BEGIN_NAMESPACE

class QMemoryVideoBufferPrivate : public QAbstractVideoBufferPrivate

{

public:

    QMemoryVideoBufferPrivate()

        : bytesPerLine(0)

        , mapMode(QAbstractVideoBuffer::NotMapped)

    {

    }

    int bytesPerLine;

    QAbstractVideoBuffer::MapMode mapMode;

    QByteArray data;

};

/*!

    \class QMemoryVideoBuffer

    \brief The QMemoryVideoBuffer class provides a system memory allocated video data buffer.

    \internal

    QMemoryVideoBuffer is the default video buffer for allocating system memory.  It may be used to

    allocate memory for a QVideoFrame without implementing your own QAbstractVideoBuffer.

*/

/*!

    Constructs a video buffer with an image stride of \a bytesPerLine from a byte \a array.

*/

QMemoryVideoBuffer::QMemoryVideoBuffer(const QByteArray &array, int bytesPerLine)

    : QAbstractVideoBuffer(*new QMemoryVideoBufferPrivate, NoHandle)

{

    Q_D(QMemoryVideoBuffer);

    d->data = array;

    d->bytesPerLine = bytesPerLine;

}

/*!

    Destroys a system memory allocated video buffer.

*/

QMemoryVideoBuffer::~QMemoryVideoBuffer()

{

}

/*!

    \reimp

*/

QAbstractVideoBuffer::MapMode QMemoryVideoBuffer::mapMode() const

{

    return d_func()->mapMode;

}

/*!

    \reimp

*/

uchar *QMemoryVideoBuffer::map(MapMode mode, int *numBytes, int *bytesPerLine)

{

    Q_D(QMemoryVideoBuffer);

    if (d->mapMode == NotMapped && d->data.data() && mode != NotMapped) {

        d->mapMode = mode;

        if (numBytes)

            *numBytes = d->data.size();

        if (bytesPerLine)

            *bytesPerLine = d->bytesPerLine;

        return reinterpret_cast<uchar *>(d->data.data());

    } else {

        return 0;

    }

}

/*!

    \reimp

*/

void QMemoryVideoBuffer::unmap()

{

    d_func()->mapMode = NotMapped;

}

QT_END_NAMESPACE