Three layered sources of stream labels now, in precedence order:
1. **Framework parser** (paramount/criterion/pixelogic/ctrm/dbp/deluxe)
— editorial labels with purpose/qualifier ("English Atmos",
"Director's Commentary", "English SDH"). High or Medium confidence.
2. **MPLS gap-fill** (`fill_gaps_from_mpls`) — every stream the
playlist references gets at least a basic lang+codec label, even
when the framework parser missed it.
3. **CLPI orphan append** (`append_clpi_orphans`) — streams in
/BDMV/CLIPINF/*.clpi ProgramInfo that NO MPLS playlist references.
Empirical (2026-05-11): ~5% of streams across the 11-disc corpus,
most dramatic on disc-02 (HDMV-only) at 40% CLPI-only.
Orphan numbering: each appended orphan gets
`stream_number = max(existing per type) + N` so playlist-reachable
streams keep their original positions and orphans sort cleanly at
the tail.
Orphan dedup: (stream_type, language, codec_hint) tuple — fuzzier
than PID matching (PIDs aren't carried on StreamLabel) but it's the
only signal available downstream of the gap-fill. False positives
(genuine orphan that happens to share lang+codec with an existing
entry) silently drop, which is the conservative failure mode — the
user-facing display would just see a confusing duplicate otherwise.
`mpls_universal::language_display_name` and `::codec_name` promoted
from private fn to pub(crate) so this module can build orphan labels
with consistent naming.
Tests: 2 new in gap_fill_tests — synthetic-input verification of the
dedup tuple logic and the stream_number assignment. 6/6 tests in the
gap-fill module now passing.
Per-playlist stream_number counters were resetting between MPLS
files, so a disc with 2 MPLS files each listing the same 8 audio
streams produced labels with stream_number 1..8 then 1..8 again
(dedup kept whichever PID was different, leaving the numbering
visibly broken — multiple "audio1: eng" rows).
Move the counters outside the per-file loop and increment only
when an entry survives dedup. Surviving entries now get dense
1..N numbering across the whole disc per stream_type.
Verified on corpus disc-02 (HDMV-only): was `audio1, audio1, audio1`
for the 3 distinct audio codecs (TrueHD/AC-3/DTS-HD MA), now
`audio1, audio2, audio3`. Same fix applies to disc-01 (12 audio
streams across multiple MPLS) and disc-09 (14 audio streams).
Three new modules in the labels platform, all layered so framework-
specific parsers (paramount, criterion, pixelogic, ctrm, dbp, deluxe)
always take precedence over the universal layer.
**mpls_universal.rs** (~600 LOC, 9 tests): consumes the already-parsed
`crate::mpls::Playlist::streams` and emits StreamLabel entries with
language + codec_hint per stream. Returns `Confidence::Low` (new
variant) so framework parsers' Medium/High always win the registry's
max-by-confidence tiebreaker; MPLS only gets picked when no framework
matched. Closes the "no BD-J disc" case (HDMV-only navigation) that
previously produced zero labels — language and base codec are
spec-mandated in MPLS STN tables on every Blu-ray ever made.
**bdmt.rs** (~350 LOC, 10 tests): reads `/BDMV/META/DL/bdmt_<lang>.xml`
files into a new `DiscMetadata` struct (localized title names per
ISO 639-2 code, descriptions, optional box-set position). Runs
independently of the parser registry — disc-level metadata, not
per-stream, so the registry's confidence selection doesn't apply.
Surfaced on a new `LabelAnalysis::disc_metadata` field.
**png_filenames.rs** (noop stub): pattern documentation + dead-code
detect/parse for future reactivation. Deferred because MPLS already
delivers per-stream lang/codec/type on every disc; PNG filename
language tokens only add studio variant disambiguation (FRC vs FRP,
LAS vs CSP) — niche enough to not justify the implementation cost
right now.
Wiring changes in `mod.rs`:
- New `Confidence::Low` variant (PartialOrd places it below Medium/High)
- New `ParseResult::low()` constructor
- `mpls_universal` appended last to `PARSERS` registry
- `LabelAnalysis::disc_metadata: Option<DiscMetadata>` field
- `analyze()` runs `bdmt::parse` independently and surfaces result
- `pub use bdmt::DiscMetadata` re-export so the labels-analyze tool
in freemkv-tools can construct the JSON payload
Total: 151 of 151 labels tests passing (was 132 — added 19 new).
matthew