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

#ifndef QCVDISPLAYLINK_H
#define QCVDISPLAYLINK_H

#include <QtCore/qobject.h>
#include <QtCore/qmutex.h>

#include <qtmultimediadefs.h>

#include <QuartzCore/CVDisplayLink.h>

QT_BEGIN_NAMESPACE

class QCvDisplayLink : public QObject
{
Q_OBJECT
public:
    QCvDisplayLink(QObject *parent = 0);
    virtual ~QCvDisplayLink();

    bool isValid();
    bool isActive() const;

public Q_SLOTS:
    void start();
    void stop();

Q_SIGNALS:
    void tick(const CVTimeStamp &ts);

public:
    void displayLinkEvent(const CVTimeStamp *);

protected:
    virtual bool event(QEvent *);
    
private:
    CVDisplayLinkRef m_displayLink;
    QMutex m_displayLinkMutex;
    bool m_pendingDisplayLinkEvent;
    bool m_isActive;
    CVTimeStamp m_frameTimeStamp;
};

QT_END_NAMESPACE

#endif