The #GstClockID to wait on
a pointer that will contain the jitter, can be %NULL.
the result of the blocking wait. #GST_CLOCK_EARLY will be returned if the current clock time is past the time of @id, #GST_CLOCK_OK if @id was scheduled in time. #GST_CLOCK_UNSCHEDULED if @id was unscheduled with gst_clock_id_unschedule().
MT safe.
Perform a blocking wait on @id. @id should have been created with gst_clock_new_single_shot_id() or gst_clock_new_periodic_id() and should not have been unscheduled with a call to gst_clock_id_unschedule().
If the @jitter argument is not %NULL and this function returns #GST_CLOCK_OK or #GST_CLOCK_EARLY, it will contain the difference against the clock and the time of @id when this method was called. Positive values indicate how late @id was relative to the clock (in which case this function will return #GST_CLOCK_EARLY). Negative values indicate how much time was spent waiting on the clock before this function returned.