GST_PAD_GET_PREROLL_COND  852 gst/gstpad.h       g_cond_wait (GST_PAD_GET_PREROLL_COND (pad), GST_PAD_GET_PREROLL_LOCK (pad))
GST_PAD_GET_PREROLL_COND  854 gst/gstpad.h       g_cond_timed_wait (GST_PAD_GET_PREROLL_COND (pad), GST_PAD_GET_PREROLL_LOCK (pad), timeval)
GST_PAD_GET_PREROLL_COND  855 gst/gstpad.h   #define GST_PAD_PREROLL_SIGNAL(pad)     g_cond_signal (GST_PAD_GET_PREROLL_COND (pad));
GST_PAD_GET_PREROLL_COND  856 gst/gstpad.h   #define GST_PAD_PREROLL_BROADCAST(pad)  g_cond_broadcast (GST_PAD_GET_PREROLL_COND (pad));