Optional. Instructs subclass to clear any codec caches and discard any pending samples and not yet returned decoded data. @hard indicates whether a FLUSH is being processed, or otherwise a DISCONT (or conceptually similar).
Optional. Instructs subclass to clear any codec caches and discard any pending samples and not yet returned decoded data. @hard indicates whether a FLUSH is being processed, or otherwise a DISCONT (or conceptually similar).