Function gst::ffi::gst_message_new_step_start

pub unsafe extern "C" fn gst_message_new_step_start(
    src: *mut GstObject, 
    active: gboolean, 
    format: GstFormat, 
    amount: guint64, 
    rate: gdouble, 
    flush: gboolean, 
    intermediate: gboolean
) -> *mut GstMessage