Function gst::ffi::gst_debug_log_valist

pub unsafe extern "C" fn gst_debug_log_valist(
    category: *mut GstDebugCategory, 
    level: GstDebugLevel, 
    file: *const gchar, 
    function: *const gchar, 
    line: gint, 
    object: *mut GObject, 
    format: *const gchar, 
    args: va_list
)