camera.h

#ifndef CAMERA_H
#define CAMERA_H

#include <QtGui>
#include <QCamera>
#include <QCameraImageCapture>
#include <QSystemScreenSaver>
QTM_USE_NAMESPACE
#include <QAbstractVideoSurface>
#include <QVideoRendererControl>
#include <QVideoSurfaceFormat>

/*****************************************************************************
* MyVideoSurface
*/
class VideoIF
{
public:
    virtual void updateVideo() = 0;
};
class MyVideoSurface: public QAbstractVideoSurface
{
Q_OBJECT

public:
    MyVideoSurface(QWidget* widget, VideoIF* target, QObject * parent = 0);
    ~MyVideoSurface();

    bool start(const QVideoSurfaceFormat &format);

    bool present(const QVideoFrame &frame);

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

    void paint(QPainter*);

private:
    QWidget* m_targetWidget;
    VideoIF* m_target;
    QVideoFrame m_frame;
    QImage::Format m_imageFormat;
    QVideoSurfaceFormat m_videoFormat;
};



/*****************************************************************************
* CameraExample
*/
class Button;
class CameraExample: public QMainWindow, public VideoIF
{
Q_OBJECT

public:
    CameraExample(QWidget *parent = 0);
    ~CameraExample();

    void paintEvent(QPaintEvent*);
    void mousePressEvent(QMouseEvent *);

    void updateVideo();

    void keyPressEvent(QKeyEvent *);


public slots:
    void enableCamera();
    void lockStatusChanged(QCamera::LockStatus status, QCamera::LockChangeReason reason);
    void searchAndLock();
    void captureImage();
    void imageCaptured(int id, const QImage &preview);
    void error(QCamera::Error);

private:
    QWidget*                m_videoWidget;
    QCamera*                m_camera;
    QCameraImageCapture*    m_stillImageCapture;

    QStackedWidget*         m_stackedWidget;
    Button*                 m_exit;
    Button*                 m_cameraBtn;
    QImage                  m_capturedImage;
    QString                 m_imageName;
    QString                 m_focusMessage;
    bool                    m_focusing;

    bool                    pictureCaptured;
    bool                    showViewFinder;
    MyVideoSurface*         m_myVideoSurface;
    QSystemScreenSaver*     m_systemScreenSaver;
};

#endif // CAMERA_H