pub unsafe extern "C" fn ff_mpv_motion(
s: *mut MpegEncContext,
dest_y: *mut u8,
dest_cb: *mut u8,
dest_cr: *mut u8,
dir: c_int,
ref_picture: *mut *mut u8,
pix_op: *mut [op_pixels_func; 4],
qpix_op: *mut [qpel_mc_func; 16],
)