v4l2-wrapper

a simple c++ wrapper of v4l2

dependences:

pthread opencv-core opencv-highgui

usage:

provide two ways to get image frame

• query

  V4l2Camera webcam("/dev/video0");
  webcam.openCameraDevice(640, 480, V4L2_PIX_FMT_MJPEG);
  grabAndRender(webcam, 60*5, fmt); //60*5 seconds
  webcam.closeCameraDevice();

• callback

  V4l2Camera webcam("/dev/video0");
  webcam.openCameraDevice(640, 480, V4L2_PIX_FMT_MJPEG);
  webcam.startStreaming(callback, &webcam);
  sleep(60*5);
  webcam.stopStreaming();
  webcam.closeCameraDevice();