Function heif_image_get_polarization_pattern_data 

pub unsafe extern "C" fn heif_image_get_polarization_pattern_data(
    arg1: *const heif_image,
    pattern_index: c_int,
    out_component_indices: *mut u32,
    out_polarization_angles: *mut f32,
) -> heif_error

Get the actual data of a polarization pattern. Caller must provide pre-allocated arrays: out_component_indices: num_component_indices entries (may be NULL if num_component_indices == 0) out_polarization_angles: pattern_width * pattern_height entries