TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO move this into the context
TODO: Handle VC-1 IDUs (Transport level?)
TODO: Decypher remaining bits in extra_data