pub unsafe extern "C" fn pixRandomHarmonicWarp(
    pixs: *mut PIX,
    xmag: l_float32,
    ymag: l_float32,
    xfreq: l_float32,
    yfreq: l_float32,
    nx: l_int32,
    ny: l_int32,
    seed: l_uint32,
    grayval: l_int32
) -> *mut PIX