#ifndef _QCamV4L_hpp_
#define _QCamV4L_hpp_

#include <qobject.h>
#include <qimage.h>
#include <qtimer.h>

#include <stdio.h>
#include <stdlib.h>
#include <linux/types.h>
#include <linux/videodev.h>

#include "QCam.hpp"

class QCamSlider;

class QCamV4L : public QCam {
   Q_OBJECT
public:
   static QCam * openBestDevice(const char * devpath = "/dev/video0");
   QCamV4L(const char * devpath="/dev/video0",
           bool NONBLOCK=false,
           int preferedPalette=0 /* auto palette*/);
   const uchar * yuvFrame() const { return yuvBuffer_;};
   const QSize & size() const;
   void resize(const QSize & s);
   ~QCamV4L();
   int getBightness() const;
   int getContrast() const;
protected:
   int device_;
   struct video_capability capability_;
   struct video_window window_;
   struct video_picture picture_;
   void updatePictureSettings();
   bool dropFrame();
   /** should be overloaded.
       set x an y to allowed value.
   */
   virtual void checkSize(unsigned int & x, unsigned int & y) const;
private:
   bool setSize(unsigned int x, unsigned int y);
   void init(int preferedPalette);
   void initRemoteControl(QWidget * remoteCTRL);
   void allocBuffers();
   uchar * yuvBuffer_;
   uchar * tmpBuffer_;
   QTimer timer_;
   QSize size_;
   /* for remote controle */
   QCamSlider * remoteCTRLbrightness_;
   QCamSlider * remoteCTRLcontrast_;
   
public slots:
   void setContrast(int value);
   void setBrightness(int value);
protected slots:
   virtual bool updateFrame();
signals:
   void contrastChange(int);
   void brightnessChange(int);
};

#endif