docs: def _format_info(format_int, format_flag=_snd.SFC_GET_FORMAT_INFO):
      """Return the ID and short description of a given format."""
      format_info = _ffi.new("SF_FORMAT_INFO*")
      format_info.format = format_int
      _snd.sf_command(_ffi.NULL, format_flag, format_info,
                      _ffi.sizeof("SF_FORMAT_INFO"))
      name = format_info.name
      return (_format_str(format_info.format),
              _ffi.string(name).decode('utf-8', 'replace') if name else "")