LOCMAF in moqlivemock

LOCMAF (Low Overhead CMAF for Media over QUIC) is specified by the IETF Internet-Draft draft-einarsson-moq-locmaf, which is the normative reference. The codec lives in the reusable Go module github.com/Eyevinn/locmaf, together with the locmaf CLI (round-trip aligner, golden-vector corpus) and the locmaf.dev explainer site.

moqlivemock implements the draft's current packaging version (locmafVersion as reported by locmaf.Version):

• mlmpub encodes each CMSF rendition as both a cmaf track and a locmaf track (<name>_locmaf) sharing one initDataList entry, using locmaf.EncodeCanonical per chunk with one in-group state per MoQ group (internal/asset.go, internal/moqgroup.go).
• mlmsub expands received LOCMAF Objects back to CMAF chunks with locmaf.Decode + locmaf.ReconstructCanonical (internal/sub/sub.go) and rejects tracks whose locmafVersion it does not implement.
• DRM (cbcs and cenc) round-trips through the packaging: the per-sample senc metadata rides as header fields and saiz/saio are regenerated on reconstruction.

Earlier in-repo documents describing LOCMAF v0.1 and v0.2 were removed when the specification moved to the Internet-Draft; they remain available in the git history (and v0.2 at the locmaf-v0.2 tag).