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3 Commits
Author SHA1 Message Date
enricobuehlerandClaude Fable 5 f3c3a9427b feat(client/abr): learn the host's rate cap from short acks, and read host encode time as a signal
Two client-side halves of the §ABR-overdrive fix (the 4K120 sessions that
climbed to 1 Gbps against a 794 Mbps encoder and a 8.33 ms budget):

- Short-ack cap learning: the host now resolves a climb it can't serve to what
  the encoder actually runs at (its codec-level ceiling, or the current rate
  while encode is behind cadence). Two consecutive identical short acks latch
  that value as a host cap the climb logic folds into its ceiling — one short
  ack stays a transient (a failed rebuild also acks short once). The cap is
  mode-scoped (cleared on an accepted mode switch, tracked via a mode
  generation counter the control task bumps) and re-probes one step after ~60 s
  parked clean, so a heavy-scene refusal can't quietly cap the whole session.

- Host-encode-latency down-driver: the per-AU 0xCF `encode_us` the host
  already ships (and the overlay already draws) now feeds the controller
  through its own window accumulator — the overlay channel is lossy and
  embedder-drained, so the ABR gets a dedicated mirror of the decode-latency
  path. Baseline-relative like the decode signal (an escalated host reports
  encode_us inflated by ~a frame of queue depth; an absolute budget threshold
  would read permanently red), with the baseline rebased after our own
  decreases so one backoff doesn't train-fire into the floor. This is the only
  signal that can push an already-too-high rate back under the encoder's
  compute knee — host climb refusal stops the climb, but nothing else descends
  on a clean LAN.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-25 01:44:54 +02:00
enricobuehlerandClaude Fable 5 de7b54d4e0 fix(core): remaining 15 sweep lows — client, clipboard, C ABI (v10), FEC, GSO, GTK
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Second and final batch from the 2026-07-20 core-sweep lows:

client:
- connect() timeout now sets `quit` before shutdown, so a handshake that
  completes after the deadline closes with QUIT_CLOSE_CODE instead of
  leaving the host lingering (virtual display up) for a reconnect that
  never comes.
- probe_result: saturating_add on the wire-supplied wire_packets +
  send_dropped counters (debug-build overflow panic / release wrap).
- the standing-latency bleed no longer sets flush_in_window: that flag
  is the ABR's SEVERE (×0.7) verdict, and the bleed fires only on
  provably loss-free windows the controller itself scores as fine.

clipboard:
- fetch_cancels pruned on every new fetch (was: one dead oneshot per
  paste for the session).
- serve chunks gated on a parked waiter + capped at CLIP_FETCH_CAP with
  an Error event (was: unbounded silent accumulation under any req_id).
- serve_inbound park bounded by FETCH_STALL_SECS + send.stopped() (was:
  an unanswered FetchRequest parked the task, waiter, and bi-stream
  forever; ~100 of them exhaust the connection's bidi budget).

C ABI (ABI_VERSION 9 → 10, header regenerated, additive only):
- new punktfunk_connection_clock_offset_now_ns — the LIVE re-synced
  offset (Swift/Kotlin latency math read the frozen connect-time value
  ~40ms wrong after a wall-clock step).
- to_config: checked u64→usize narrowing of max_frame_bytes (32-bit
  armeabi truncated >4GiB to a plausible residue).
- host_poll_input: no &mut held across the embedder callback (re-entry
  aliased it — UB under noalias); mid-drain callback clears now stick.
- next_audio_pcm: DTX (empty) payloads skipped — decode synthesized
  120ms of concealment per 5ms slot and grew the playout ring forever.
- next_clipboard releases the parked payload on an empty poll (a one-off
  50MiB paste stayed resident all session).
- frames_dropped / wants_decode_latency write their documented 0/false
  defaults before the NULL-handle check.
- gamepad constant docs match pick_gamepad() reality (DualSenseEdge/
  SwitchPro landed; DualSense/DS4 honored on Windows UMDF too).

FEC:
- gf8 reconstruct/reconstruct_into reuse the (k,m) codec cache like
  encode_into (was: fresh 230×200 generator + decode inversion per
  lossy block on the pump thread).
- vendored fec-rs: the 8 safe wrap_mul_slice shims assert equal lengths
  (x86 SIMD callees bound stores on input.len() — safe-code OOB write);
  ReconstructShard's safety contract gains the len()==get().len()
  clause and reconstruct_internal sizes raw slices from the slice.

transport/GTK:
- Linux GSO super-buffer capped at the real UDP payload ceiling (65487)
  not 65535 — seg sizes ≥1024 could EMSGSIZE and latch GSO off
  process-wide, blamed on the network.
- GTK settings dialog no longer rewrites an unlisted-but-valid stored
  gamepad preference to "auto" on close.

Already fixed on main (verified stale, skipped): the reassembler FEC
ceiling, wants_decode_latency's third term, request_probe rollback +
the generalized probe watchdog.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-20 18:26:43 +02:00
enricobuehlerandClaude Fable 5 ce51a2ba74 refactor(core): decompose the client run_pump monolith into pump/ submodules
client/pump.rs was a single 1192-line async fn stacking six concerns.
It is now a 190-line orchestrator (same spawn order, same channel
wiring) over five focused modules:

- pump/handshake.rs   — connect + Hello/Welcome/Start + skew handshake +
                        hole punch + Session construction (HandshakeOut)
- pump/input_task.rs  — the gamepad snapshot/removal/arrival re-send
                        state machine + passthrough input forwarding
- pump/control_task.rs— the control-stream select loop (renegotiation,
                        probes, bitrate acks, clock re-sync, clip
                        metadata), bundled as ControlTask
- pump/datagram_task.rs — the datagram tag demux + rumble reorder gate
- pump/data.rs        — the blocking data-plane pump (loss reports, ABR
                        + capacity probe, jump-to-live detectors,
                        standing-latency bleed), bundled as DataPump

Every body moved verbatim (dedent + arg-struct destructures aliasing
the original binding names); no per-frame indirection added — the pump
loop, its locals, and the hot-path shape are byte-equivalent. The
Ctrl/DataPump arg structs exist only to stay under too_many_arguments.

196 lib tests pass; clippy clean on --features quic AND
--no-default-features (--all-targets); include/punktfunk_core.h
byte-identical; fmt clean.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-20 18:07:14 +02:00