atsc3-route

ATSC A/331 Annex A ROUTE binary framing: EXT_ROUTE_PRESENTATION_TIME / EXT_TOL LCT header extensions, source/repair FEC Payload ID layouts, and the Codepoint (CP) delivery-object semantics table. Built on rmt-flute's LCT/ALC/FLUTE; no XML/S-TSID/SLS.