V4L2_CID_USER_UVC_BASE
#define V4L2_CID_UVC_REGION_OF_INTEREST_RECT (V4L2_CID_USER_UVC_BASE + 1)
#define V4L2_CID_UVC_REGION_OF_INTEREST_AUTO (V4L2_CID_USER_UVC_BASE + 2)