/****************************************************************************
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** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the QtMultimedia module of the Qt Toolkit.
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****************************************************************************/

#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