Function iowr

rustcv-camera/src/backend/linux/sys.rs:39–41

(typ: u8, nr: u8)

    ioc(1, typ, nr, mem::size_of::<T>())
}
const fn iowr<T>(typ: u8, nr: u8) -> u32 {
    ioc(3, typ, nr, mem::size_of::<T>())
}

const VIDIOC_QUERYCAP: u32 = ior::<v4l2_capability>(b'V', 0);
const VIDIOC_ENUM_FMT: u32 = iowr::<v4l2_fmtdesc>(b'V', 2);