#[unsafe(no_mangle)]pub unsafe extern "C" fn create_writer_zstd_c(
_filename_c: *const c_char,
) -> *mut RKRConFrameWriter#[unsafe(no_mangle)]pub unsafe extern "C" fn create_writer_zstd_c(
_filename_c: *const c_char,
) -> *mut RKRConFrameWriter