v0.25.2: DTS-HD codec ID + PGS BlockDuration
- MkvTrack::audio emits A_DTS/MA, A_DTS/HR, A_DTS per the DTS family instead of mislabelling everything as A_DTS. Plex transcoder and strict hardware decoders reject DTS-HD MA payload under a plain A_DTS track. - PgsParser is now stateful: pairs display PCS with the following empty PCS to compute a duration. Frame::duration_ns + PesFrame::duration_ns carry it through; MkvMuxer::write_frame gains a final Option<u64> parameter that emits BlockGroup + BlockDuration when set. Fixes subtitle bitmaps lingering past their intended end-time.
This commit is contained in:
MattJackson
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# Changelog
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## 0.25.2 (2026-05-19)
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### Fixed
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- **DTS-HD codec ID** — `MkvTrack::audio` now emits `A_DTS/MA` for
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DTS-HD MA and `A_DTS/HR` for DTS-HD HR instead of mislabelling
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both as plain `A_DTS`. Strict players (Plex transcoder, some
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hardware decoders, AV receivers) reject lossless DTS-HD MA
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payload when the track advertises `A_DTS` because the ID
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implies the 1.5 Mbps core-only bitstream.
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- **PGS subtitle BlockDuration** — the PGS parser is now stateful:
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it pairs each display PCS with the following empty/clear PCS to
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compute a duration, and the MKV muxer emits a `BlockGroup` +
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`BlockDuration` for subtitles that carry one. Without this the
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last bitmap lingered on screen until the next display set
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replaced it (or until end of file).
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### Changed
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- `codec::Frame` gains `duration_ns: Option<u64>` (set by parsers
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that can compute one; currently only PGS).
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- `pes::PesFrame` gains `duration_ns: Option<u64>` (in-memory only;
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not part of the on-wire serialization).
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- `MkvMuxer::write_frame` now takes a final `duration_ns: Option<u64>`
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parameter. When `Some`, the frame is emitted as a `BlockGroup`
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with `BlockDuration` instead of a `SimpleBlock`.
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## 0.25.1 (2026-05-19)
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### New — autorip event_fn plumbing
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- `PrefetchedSectorSource::new_with_events(reader, extents, batch,
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halt, event_fn)` — same producer-thread pipeline as `new()`, plus
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an optional callback fired from the producer with `BytesRead`
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events after every successful batch. Lets the autorip multipass
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+ resume mux paths drive their progress UI from the highway
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without polling the consumer side.
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- `build_iso_pipeline` gains an `event_fn` parameter so callers can
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wire the same callback through one ctor.
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### Changed
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- `pes::Stream` trait: new default `errors() -> u64` method
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(default returns 0). Lets `Box<dyn Stream>` callers query the
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skip-on-error counter without downcasting. `DiscStream` overrides
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to surface its existing `errors` field.
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### Removed (breaking)
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- `DiscStream::new_pipeline` and `DiscStream::read_pipeline`
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deleted. All file-backed mux now uses `build_iso_pipeline` →
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`PipelinedPesStream`. `DiscStream` is now the single-threaded
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inline reader used by autorip's live-drive single-pass path only.
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- `DiscStream::demux_thread` and `demux_rx` fields removed.
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- `M2tsStream::open` deleted; `Mode::Read` variant removed.
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`m2ts://` URLs go through the internal `build_m2ts_pipeline`
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helper in `mux/resolve.rs` → `PipelinedPesStream`. `M2tsStream`
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is a write-only sink now.
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## 0.25.0 (2026-05-19)
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### New — the freemkv mux throughput "highway"
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Three-stage pipelined PES read path. Read+decrypt runs on a
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producer thread, M2TS demux runs on a second thread, codec parse
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runs on the caller's thread. Communication between stages is via
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bounded `crossbeam_channel` with a recycled buffer pool — no
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allocations or memcpys in the steady-state hot loop.
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**Throughput on the rip1 testbed (Civil_War UHD, 62 GiB ISO →
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`null://`, single-thread caller):**
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| | MB/s |
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| ------------------------------------- | -----: |
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| 0.23.2 baseline | 60 |
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| + memchr SIMD HEVC start-code scan | 69 |
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| + ts.feed no-copy boundary | 72 |
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| + `PrefetchedSectorSource` (producer) | 124 |
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| + `DemuxThread` (3-stage pipeline) | 135 |
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| + zero-copy recycled buffer pool | 148 |
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| + 16 KiB initial PesAssembler buffer | 162 |
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| + mimalloc allocator in freemkv CLI | 200+ |
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| **+ warm cache** | **660** |
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The new public API:
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- `libfreemkv::PrefetchedSectorSource` — wraps any `SectorSource`,
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spawns a producer thread, exposes recycled-buffer channels.
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- `libfreemkv::io::byte_prefetcher::BytePrefetcher` —
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`std::io::Read` analogue for byte-stream sources (m2ts files,
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sockets, stdin).
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- `libfreemkv::mux::demux_thread::DemuxThread` — the M2TS demux
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worker; `spawn_zero_copy` takes either prefetcher's channels.
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- `libfreemkv::PipelinedPesStream` — the read-side `Stream` impl
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that runs codec parse on the caller thread.
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- `libfreemkv::build_iso_pipeline(reader, title, keys, batch,
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format, halt)` — the canonical ctor that wires all three stages
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for an ISO file source.
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### Changed (breaking)
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- `IsoSectorReader` (the naive duplicate of `FileSectorSource`)
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deleted. `FileSectorSource` is the sole file-backed sector
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source; it carries the SEQUENTIAL fadvise hint, the periodic
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DONTNEED page-cache eviction, and (new) the per-read
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`readahead()` async-prefetch syscall.
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- `mux::input("iso://...", &opts)` now returns a
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`PipelinedPesStream`. Function signature
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`input(&str, &InputOptions) -> io::Result<Box<dyn Stream>>` is
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unchanged; callers that treated the return value as
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`Box<dyn Stream>` keep working.
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### Other
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- `FileSectorSource` exposes per-OS `prefetch()` hooks
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(`readahead(2)` on Linux, `fcntl(F_RDADVISE)` on macOS, no-op on
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Windows + other).
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- AACS decrypt thread-pool: env var renamed from
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`FREEMKV_DECRYPT_THREADS` to `FREEMKV_THREADS`; default raised
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to `cores.clamp(1, 64)`.
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- `PesAssembler` initial buffer capacity 256 KiB → 16 KiB (avoids
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the 64-page first-touch fault tax on every PES boundary).
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- HEVC / H.264 `find_start_code` swapped onto
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`memchr::memmem::find` (SIMD).
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## 0.18.4 (2026-05-09)
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### Build / CI hardening — no library code changes
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