The two-pair investigation (wired Mac clients stuck at a rock-steady
~18-19 ms "network" that survived the load ending and cleared only on
reconnect) exposed two structural gaps, one of measurement and one of
recovery:
- Receipt was stamped at the hand-off PULL (Swift nextAU, pf-client-core,
Android decode loops), not at reassembly completion — so any client-side
standing state between the reassembler and the pull read as NETWORK
latency, undiagnosable from the HUD. ABI v9: `PunktfunkFrame`/`Frame`
grow `received_ns`, stamped by `Session::poll_frame` as the AU crosses
the session boundary. Every embedder now uses the core stamp; the Apple
client keeps the pull instant as `AccessUnit.pulledNs` and shows the
receipt→pull wait as its own "client queue" term (detailed HUD tier from
2 ms + a `queue_p50` stats-log field). Decode stages keep their pull
anchor on all platforms, so no historical stage shifts meaning.
- The jump-to-live detectors deliberately ignore anything under 6 queued
frames / 400 ms behind — so a small, constant, loss-free elevation (a
sub-frame standing backlog, or a stale clock offset after a wall-clock
step/slew) is carried for the rest of the session. New third detector
(`StandingLatency`, unit-tested ladder): window-MIN one-way delay
≥ 10 ms above the session floor with zero loss for ~4.5 s escalates
gently — a free clock re-sync first (an applied re-sync re-bases the
floor), then at most 3 flush+keyframe bleeds sharing the jump-to-live
cooldown, then a loud disarm naming what it means. Loss windows reset
the run: congestion belongs to FEC/ABR, not this detector.
Also: mid-stream re-sync apply/discard logs debug→info — they are the
forensic trail for the stale-offset case and were invisible in the field.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Break the 1747-line clients/android/native/src/decode.rs into a decode/ directory
module (mod.rs + 5 concern submodules):
- decode/setup.rs : codec creation + low-latency config + thread/frame-rate
tuning + HDR static-info encode
- decode/display.rs : DisplayTracker + render-callback registration + HDR dataspace
- decode/latency.rs : realtime clock + decoded-pts / user-flags stat recording
- decode/sync_loop.rs : the synchronous poll decode loop (+ feed/drain) — moved WHOLE
- decode/async_loop.rs : the event-driven async decode loop (+ helpers) — moved WHOLE
decode/mod.rs keeps the consts, DecodeOptions, and the `run` entry point + the
`codec_mime`/`codec_label` re-export, so every crate::decode::X path stays byte-stable.
The module has no decoder struct (free functions + small types), so both decode loops
move byte-for-byte and their separately-inlined received-stat recording is NOT unified.
16 helper fns/types became pub(super) for sibling access; zero field bumps. lib.rs
unchanged (`#[cfg(target_os="android")] mod decode;` resolves to decode/mod.rs).
Verified: cargo-ndk check (aarch64-linux-android, clean) + the gradle cargoNdkDebug
build (arm64-v8a / armeabi-v7a / x86_64). On-device runtime re-verification still owed
per the plan (the two decode loops are a hot path).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehlerandClaude Fable 5