VIDIOC_G_CTRL
case VIDIOC_G_CTRL:
case VIDIOC_G_CTRL:
error = ioctl(video_fd, VIDIOC_G_CTRL, &ctrl);
error = ioctl(video_fd, VIDIOC_G_CTRL, &ctrl);
error = ioctl(video_fd, VIDIOC_G_CTRL, &ctrl);