Test-hardening release, no runtime changes. Adds spec-grounded unit tests
across the silent-corruption surfaces — UDF/MPLS/CLPI/IFO parsing, BD/DVD
title + extent assembly, AACS/CSS key handling, TS/PS demux + codec parsers,
MKV/EBML container output, the mux pipeline, sector prefetch + decrypt
decorator, drive/SCSI sense decoding, label extraction, and core I/O. Each
test is grounded in the format spec or real on-disc behavior and verified to
fail under a targeted source mutation. No behavior changed.
Library-wide review-and-fix pass: tightened AACS keydb/handshake/variant
handling and trailing-partial-unit policy, corrected MPLS mark offset and
added UDF allocation bounds, hardened the mux/codec framing and M2TS paths,
guarded SCSI READ CAPACITY short transfers and unified error mapping, added
overflow guards on untrusted disc input, and made prefetch shutdown
deterministic. Release profile now builds with thin LTO + single codegen unit.
- m2ts_mux: replace u64::is_multiple_of (stable in 1.87+) with %.
CI on the pinned 1.86 toolchain rejected the unstable feature use.
- mux/{fmp4,hevc,m2ts_mux}: rustfmt drift cleanup (test-code wrapping).
SocketSink + UdpSocketSink (`src/io/sink/socket.rs`) — sequential-only
TCP/UDP write destinations. SocketSink wraps BufWriter<TcpStream> with
1 MiB capacity, tunes SO_SNDBUF on construction, calls shutdown(Write)
on finish(). UdpSocketSink emits one datagram per write — caller
packetizes. Both impl Write+Send and thus satisfy SequentialSink via
the Phase 2 blanket; neither impls Seek, so RandomAccessSink is
correctly inaccessible (compile error to mux MKV onto a socket).
New sequential container muxers in src/mux/:
- hevc/ — raw HEVC Annex B elementary stream. Length-prefixed NALU
→ 00 00 00 01 NALU. hvcC parsing emits VPS/SPS/PPS once at stream
head. Fully ships.
- m2ts_mux/ — standard MPEG-TS (188-byte packets). Single program,
HEVC video on PID 0x100, optional AC3/TrueHD audio on PID 0x101.
PAT+PMT re-emitted every 250 packets; PCR stamped on video every
40 packets. Hand-rolled, no new deps. Distinct from the existing
BD-TS (192-byte) `mux::m2ts::M2tsStream` — that path stays as-is.
- fmp4/ — fragmented MP4. STUB: ftyp + minimal moov skeleton with
one HEVC video trak + mvex/trex. Media fragments (moof+mdat) are
TODO for v0.22.0 — write_video accumulates frames into a pending
buffer that finish() clears. Init segment is well-formed enough
that init_segment_starts_with_ftyp_then_moov asserts the box
chain.
17 new unit tests added (socket round-trip, HEVC Annex B conversion,
M2TS packet alignment + PAT/PMT cadence + per-PID CC, fMP4 box chain).
All 514 lib tests + 17 new = pass on Rust 1.86 (fmt + clippy + test
via (internal)/scripts/precommit.sh libfreemkv).
No new dependencies. No version bump. Don't-touch list clean.
Matthew Jackson