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#ifndef QX11VIDEOSURFACE_H
#define QX11VIDEOSURFACE_H

#include <QtWidgets/qwidget.h>
#include <qabstractvideosurface.h>

#include <X11/Xlib.h>
#include <X11/extensions/Xv.h>
#include <X11/extensions/Xvlib.h>

QT_BEGIN_NAMESPACE

class QX11VideoSurface : public QAbstractVideoSurface
{
    Q_OBJECT
public:
    QX11VideoSurface(QObject *parent = 0);
    ~QX11VideoSurface();

    WId winId() const;
    void setWinId(WId id);

    QRect displayRect() const;
    void setDisplayRect(const QRect &rect);

    QRect viewport() const;
    void setViewport(const QRect &rect);

    int brightness() const;
    void setBrightness(int brightness);

    int contrast() const;
    void setContrast(int contrast);

    int hue() const;
    void setHue(int hue);

    int saturation() const;
    void setSaturation(int saturation);

    QList<QVideoFrame::PixelFormat> supportedPixelFormats(
            QAbstractVideoBuffer::HandleType handleType = QAbstractVideoBuffer::NoHandle) const;

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

    bool present(const QVideoFrame &frame);

private:
    Display *display() const;

    WId m_winId;
    XvPortID m_portId;
    GC m_gc;
    XvImage *m_image;
    QList<QVideoFrame::PixelFormat> m_supportedPixelFormats;
    QVector<int> m_formatIds;
    QRect m_viewport;
    QRect m_displayRect;
    QPair<int, int> m_brightnessRange;
    QPair<int, int> m_contrastRange;
    QPair<int, int> m_hueRange;
    QPair<int, int> m_saturationRange;

    bool findPort();
    void querySupportedFormats();

    int getAttribute(const char *attribute, int minimum, int maximum) const;
    void setAttribute(const char *attribute, int value, int minimum, int maximum);

    static int redistribute(int value, int fromLower, int fromUpper, int toLower, int toUpper);
};

QT_END_NAMESPACE

#endif
