GST_PAD_PREROLL_SIGNAL 1407 libs/gst/base/gstbasesink.c   GST_PAD_PREROLL_SIGNAL (pad);
GST_PAD_PREROLL_SIGNAL 3873 libs/gst/base/gstbasesink.c       GST_PAD_PREROLL_SIGNAL (sink->sinkpad);
GST_PAD_PREROLL_SIGNAL 4834 libs/gst/base/gstbasesink.c           GST_PAD_PREROLL_SIGNAL (basesink->sinkpad);