- 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.
Introduces the freemkv mux throughput highway: a three-stage thread
pipeline that replaces the inline single-thread read path for any
file-backed source (ISO and m2ts file URLs both route through it).
Thread A: read + decrypt (PrefetchedSectorSource / BytePrefetcher)
Thread B: M2TS demux (DemuxThread)
Thread C: codec parse (PipelinedPesStream, on caller thread)
Each handoff uses a bounded crossbeam channel with a recycled buffer
pool — no allocations or memcpys in the steady-state hot loop.
Component map:
* io/byte_prefetcher.rs (new) — std::io::Read producer thread with
recycled Vec<u8> pool. Pairs with PrefetchedSectorSource (sector
side) so demux_thread::spawn_zero_copy can wire either upstream.
* sector/prefetched.rs — recycled buffer pool added; into_channels()
peels off the rx/recycle_tx/shell triple for zero-copy demux.
* mux/demux_thread.rs (new) — owns the TsDemuxer/PsDemuxer, runs
feed() on its thread, ships Vec<PesPacket> batches.
* mux/pipelined_stream.rs (new) — the read-side Stream impl. Pulls
packets from the demux thread and runs codec parse on the caller.
* mux/resolve.rs — build_iso_pipeline (public) / build_m2ts_pipeline
(private) assemble the three stages; iso:// and m2ts:// both
return PipelinedPesStream.
* mux/m2ts.rs — collapsed to a write-only sink (Mode::Read deleted;
the read direction lives on the highway now).
* mux/codec/h264.rs — find_start_code uses memchr SIMD memmem::find.
* mux/codec/hevc.rs — tightened frame_data initial capacity.
* mux/ts.rs — boundary-packet handling avoids the per-batch 16 MiB
remainder copy; PesAssembler starts at 16 KiB to dodge the 64-page
first-touch fault tax that the previous 256 KiB pre-alloc paid on
every PES boundary.
* mux/disc.rs — gains DiscStream::new_pipeline + read_pipeline as
the legacy autorip ingress (drive + multipass paths still need
on_event / skip_errors before they migrate to the highway).
* io/file_sector_source/* — per-OS prefetch() syscall hook
(Linux readahead, macOS F_RDADVISE, Windows/other no-op).
* decrypt.rs — FREEMKV_DECRYPT_THREADS renamed to FREEMKV_THREADS;
pool sized to all cores by default.
Measured on rip1 testbed (Civil War UHD, 62 GiB ISO → null://):
60 → 322 MB/s warm cache (old new_pipeline path)
60 → 660 MB/s warm cache (highway path, this commit)
60 → 126 MB/s sustained disk-bound
The IsoSectorReader baseline reader was deleted in favour of
FileSectorSource so the freemkv CLI and autorip exercise the same
read path.
Stream trait: read() returns PesFrame, write() accepts PesFrame.
A stream is a stream — you read from it or write to it.
No separate Input/Output traits.
API: libfreemkv::input(url) and libfreemkv::output(url, title, codecs)
Returns Box<dyn Stream>.
MattJackson