pub unsafe extern "C" fn libmv_trackRegion(
options: *const libmv_TrackRegionOptions,
image1: *const f32,
image1_width: c_int,
image1_height: c_int,
image2: *const f32,
image2_width: c_int,
image2_height: c_int,
x1: *const f64,
y1: *const f64,
result: *mut libmv_TrackRegionResult,
x2: *mut f64,
y2: *mut f64,
) -> c_int