contrib/oul/oufgl/frame_grabber_vil.h

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#ifndef __frame_grabber__
#define __frame_grabber__ 1

#include <sys/mman.h>
#include <sys/ioctl.h>
#include <vcl_sys/types.h>
#include <linux/videodev.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/signal.h>
#include <vcl_cstdlib.h> // for exit()
#include <vcl_iostream.h>
#include <vil/vil_image_view.h>
#include <unistd.h>

// The framegrabber class. Very easy to use. Uses the video-4-linux
// interface. Simply create an object of type FrameGrabber and then
// call grab_frame which returns a greyscale image.

using namespace std;

class FrameGrabberVil
{
 public:
  FrameGrabberVil(const string &device_name="/dev/video0",
                  int width=320, int height=240);
  ~FrameGrabberVil();
  FrameGrabberVil(const FrameGrabberVil &cpy)
  { vcl_cerr << "Can't copy framegrabber\n"; vcl_exit(-1); }
  FrameGrabberVil &operator=(const FrameGrabberVil &cpy)
  { vcl_cerr << "Can't copy framegrabber\n"; vcl_exit(-1); return *this; }
  vil_image_view<vxl_byte> *grab_frame();

 private:
  int fd; // the file descriptor for the v4l device
  struct video_mmap mm;
  vil_image_view<vxl_byte> **frame;
  unsigned char *bigbuf;
  struct video_mbuf vm;
};

#endif