/****************************************************************************
**
** Copyright (C) 2011 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtMultimedia module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the 
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
** $QT_END_LICENSE$
** 
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
****************************************************************************/

#ifndef QABSTRACTVIDEOSURFACE_H
#define QABSTRACTVIDEOSURFACE_H

#include <QtCore/qobject.h>
#include <QtMultimedia/qvideoframe.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(Multimedia)

class QRectF;
class QVideoSurfaceFormat;

class QAbstractVideoSurfacePrivate;

class Q_MULTIMEDIA_EXPORT QAbstractVideoSurface : public QObject
{
    Q_OBJECT

public:
    enum Error
    {
        NoError,
        UnsupportedFormatError,
        IncorrectFormatError,
        StoppedError,
        ResourceError
    };

    explicit QAbstractVideoSurface(QObject *parent = 0);
    ~QAbstractVideoSurface();

    virtual QList<QVideoFrame::PixelFormat> supportedPixelFormats(
            QAbstractVideoBuffer::HandleType handleType = QAbstractVideoBuffer::NoHandle) const = 0;
    virtual bool isFormatSupported(const QVideoSurfaceFormat &format) const;
    virtual QVideoSurfaceFormat nearestFormat(const QVideoSurfaceFormat &format) const;

    QVideoSurfaceFormat surfaceFormat() const;

    virtual bool start(const QVideoSurfaceFormat &format);
    virtual void stop();

    bool isActive() const;

    virtual bool present(const QVideoFrame &frame) = 0;

    Error error() const;

Q_SIGNALS:
    void activeChanged(bool active);
    void surfaceFormatChanged(const QVideoSurfaceFormat &format);
    void supportedFormatsChanged();

protected:
    QAbstractVideoSurface(QAbstractVideoSurfacePrivate &dd, QObject *parent);

    void setError(Error error);

private:
    Q_DECLARE_PRIVATE(QAbstractVideoSurface)
};

QT_END_NAMESPACE

QT_END_HEADER

#endif
