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v0.11.18: DiscStream halt flag — Stop works in dense bad-sector regions

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DiscStream::fill_extents loops internally while the demuxer waits for
enough clean data to emit a PES frame. In a dense bad zone that loop
can run for minutes without returning to the outer read() call, so
the caller's Stop signal never gets serviced until a frame is finally
emitted — which may be very far away.

Add DiscStream::set_halt(Arc<AtomicBool>) — typically wired to
Drive::halt_flag() for unified Stop across drive recovery phases and
stream sector processing. fill_extents checks the flag at the top of
every retry iteration; raising it returns Err(Error::Halted) within
one SCSI round-trip.

No behavior change for callers that don't call set_halt. Unblocks the
architectural fix for the "Stop doesn't stop" bug observed on a
damaged UHD disc.
This commit is contained in:
matthew
2026-04-24 07:41:13 -07:00
parent 4a8913be22
commit 9b65cb8fa1
3 changed files with 45 additions and 1 deletions
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CHANGELOG.md
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# Changelog
## 0.11.18 (2026-04-24)
### DiscStream halt flag — Stop works during dense bad-sector regions
`DiscStream::fill_extents` loops internally when the demuxer hasn't accumulated enough data to emit a PES frame — during a dense bad-sector run, that loop can spend many minutes shrinking batch sizes and zero-filling sectors without ever returning to the outer read() call. Without an internal halt check, the caller's Stop request goes unserviced until the demuxer eventually emits a frame, which may be very far away.
- **`DiscStream::set_halt(Arc<AtomicBool>)`** — share a halt flag with the stream. Typically wired to `Drive::halt_flag()` so Stop propagates across both the drive's recovery phases and the stream's sector processing.
- **`fill_extents()` checks the halt flag** at the top of every retry iteration (before each attempt at every size level). Raising the flag aborts within one read round-trip — at most the current SCSI command's timeout.
- Returns `Err(Error::Halted)` (E6010) so the outer rip pipeline terminates cleanly.
No behavior change for callers that don't call `set_halt`. Unblocks the architectural fix for the "Stop doesn't stop" bug observed on a damaged UHD disc where the stream was stuck in a 12+ hour bad-sector grind.
## 0.11.17 (2026-04-23)
### Adaptive batch sizer in DiscStream — no more per-sector descent