Function gst_message_parse_step_start

pub unsafe extern "C" fn gst_message_parse_step_start(
    message: *mut GstMessage,
    active: *mut gboolean,
    format: *mut GstFormat,
    amount: *mut u64,
    rate: *mut c_double,
    flush: *mut gboolean,
    intermediate: *mut gboolean,
)