pointer to store the UUID string uniquely identifying a content protection system.
pointer to store a #GstBuffer holding protection system specific information.
pointer to store a value that indicates where the protection information carried by @event was extracted from.
1.6
Parses an event containing protection system specific information and stores the results in @system_id, @data and @origin. The data stored in @system_id, @origin and @data are valid until @event is released.