Function point_at_qp_map 

fn point_at_qp_map(pic: &mut NV_ENC_PIC_PARAMS, map: &mut [i8], api: (u32, u32))

Hand pic the QP delta map map at API api. Below 12.0 the codec union runs eight bytes shorter and the driver reads the map’s pointer and size where the pinned layout keeps reserved5.