Stage-2's present-on-arrival saturates CAMetalLayer's FIFO image queue
whenever the stream rate runs at the panel's refresh (iOS always
vsync-latches; the macOS 26 compositor latch-paces our out-of-band
presents the same way): one early burst fills the queue to
maximumDrawableCount and — arrivals then matching latches one-for-one —
it never drains. That sticky depth is the measured 29-30 ms display
stage on the 120 Hz ProMotion devices, and the full-queue regime is
where host<->panel clock drift turns into the reported fixed-interval
repeats/drops. The 240 Hz Studio never saturates, which is why it never
showed either symptom.
Stage-3 is the same pipeline with a PresentGate: at most ONE
presented-but-undisplayed drawable in flight; the drawable's presented
handler reopens the gate and re-signals the render thread, so the next
present always takes the freshest newest-wins ring frame — the hidden
queue latency becomes explicit, correct frame drops. A 100 ms stale
fallback force-opens a gate whose handler never fires (the "presents
aren't damage" hazard class) so a pathological system degrades visibly
instead of freezing; the PUNKTFUNK_PRESENT_DEBUG `forced` counter
exposes it (0 on healthy systems).
Selection: the Settings > Display presenter picker now ships in release
builds (stage 2 default / stage 3 experimental; the freeze-prone
stage-1 diagnostic stays DEBUG-only), resolved per session with a
PUNKTFUNK_PRESENTER=stage1|stage2|stage3 env override for CLI A/B. The
pf-present debug line gains gated/forced/inflightMax — inflightMax is
the direct image-queue-depth measurement for the A/B.
Live-verified both ways against a real host at 1080p120: stage-3 holds
120/120 fps with inflightMax=1, forced=0, glass deltas p50 8.33 ms;
stage-2 is behaviorally unchanged (120/120 fps, inflightMax=2 even on
the wired 240 Hz setup — the saturation signal in miniature). Unit
tests cover the gate (one-in-flight, stale force-open, idempotent
release) and the presenter resolution (env override, release stage-1
gating); macOS tests green, iOS/tvOS xcodebuild clean.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Add an "Allow VRR" toggle (Settings → Display; default on, non-tvOS) that
hands the presenter's display link a wide frame-rate RANGE — preferred =
the stream rate — so a ProMotion / adaptive-sync display can vary its
physical refresh to match the stream. `SessionPresenter.syncFrameRate`
now runs on macOS too: on it requests min 24 / max display / preferred
stream Hz; off restores the prior behavior (macOS free-runs at the native
rate, iOS keeps its 30 Hz floor). A no-op on fixed-refresh displays.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Align the macOS/iPad Stream menu on the cross-client Ctrl+Alt+Shift set
the Windows and Linux clients reserve — Release Mouse (⌃⌥⇧Q), Disconnect
(⌃⌥⇧D), HUD toggle (⌃⌥⇧S) — with ⌘⎋ kept as the macOS/iPad capture
toggle, and surface them on a 6-second banner at stream start.
Add an opt-in V-Sync present mode (punktfunk.vsync, default OFF =
lowest-latency immediate present; PUNKTFUNK_PRESENT_MODE overrides for
A/B), with the presenter reworked to a frame-arrival-triggered render
thread across Stage2Pipeline / MetalVideoPresenter / SessionPresenter,
plus the windowed title-bar safe-area handling.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
One stat model everywhere (design/stats-unification.md): four measurement
points (capture/received/decoded/displayed), three stages that tile the
interval exactly, and a HUD that shows the addition explicitly —
end-to-end 14.2 ms p50 · 19.8 p95 · capture→on-glass
= host+network 9.8 + decode 2.1 + display 2.3
replacing each client's ad-hoc mix of overlapping absolutes (the Apple HUD's
three arrow lines that looked sequential but weren't), mean-vs-median decode
times (Windows/Linux), missing same-host-clock flags (Windows/Linux), and
three different names for the same capture→received measurement (probe's
"reassembled", Apple/Android's "client", Windows/Linux's post-decode "lat").
Per client: Apple threads receivedNs through the VT decode via the frame
refcon bit pattern so the decode stage exists at all (stage-1 fallback
honestly degrades to a capture→received headline); Windows carries
FrameTimes through the existing frame channel to the render thread and adds
e2e p50/p95 post-Present; Linux stamps received at AU pop and rides
decoded_ns on DecodedFrame to the paintable-set site; Android pairs receipt
stamps with MediaCodec output buffers via the codec's pts round-trip (JNI
stats array 14→16 doubles, indexes 0-13 unchanged). fps now uniformly counts
received AUs; lost/(received+lost) per window, hidden at zero.
docs-site gains "Understanding the Stats Overlay": what each line means, why
the equation only approximately sums (percentiles), and a line-by-line
Moonlight/Sunshine matrix — including that Moonlight has no end-to-end
number and its "network latency" is an ENet control RTT, so punktfunk's
headline must not be compared against any single Moonlight line.
Verified here: linux client + probe + core check/clippy/fmt green, android
native cargo-ndk arm64 check green. Pending: Windows CI + on-glass, swift
test on the mac, on-device Android.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Sources reorganized (client: Home/Session/Settings/Stores/Support/Trust; kit:
Audio/Connection/Gamepad/Input/Support/Video/Views) with the big files split
along the same seams.
The gamepad mode is couch-complete, and now on macOS too (the living-room
Mac case), not just iOS/iPadOS:
- GamepadSettingsView: a console-style, fully controller-navigable settings
screen (X from the launcher) — up/down moves focus, left/right steps values
(clamped, boundary thud), A cycles/toggles, B closes; the focused row shows a
one-line description. Backed by GamepadMenuList, the vertical sibling of
GamepadCarousel, and SettingsOptions — the option lists hoisted out of
SettingsView statics and shared by the touch, tvOS and gamepad settings.
- GamepadAddHostView + GamepadKeyboard: register a host end to end with a pad
— field rows open an on-screen controller keyboard (dpad grid, A types,
X backspaces, B done); the launcher carousel ends in an Add Host tile, so
the dead-end "add one with touch first" empty state is gone.
- Launcher polish: contextual hint bar with the pad's real button glyphs,
controller name + battery chip, one shared console chrome.
- GamepadScreenBackground: an animated aurora (TimelineView-driven drifting
blobs in the brand's violet family, breathing radii, slow hue shift,
legibility scrim; freezes under Reduce Motion). Pure SwiftUI on purpose — a
.metal library only bundles reliably in one of the two build systems (SPM vs
the xcodeproj's synced folders) these sources compile under.
- macOS port: settings/add-host/library present as sized sheets (a macOS sheet
takes its content's IDEAL size, and the GeometryReader-driven screens
collapsed to nothing), NSScreen-based mode lists, scroll indicators .never
(the "always show scroll bars" setting overrides .hidden), tray scrims so
scrolled rows dim under the pinned title/hints, extra title clearance, and a
PUNKTFUNK_FORCE_GAMEPAD_UI=1 dev hook — launcher/settings/add-host/keyboard/
library render-verified live on a real Mac + LAN hosts.
- GamepadMenuInput: X button support, and (re)start now snapshots held buttons
so a controller handoff press never fires twice (the B that closed the
keyboard no longer also cancels the screen underneath).
- Cleanups: one "Connection failed" alert in ContentView instead of one per
home screen; HostDiscovery.advertises/unsaved shared by both home screens.
- host: can_encode_444 stub for the non-Linux/Windows host build (the macOS
synthetic-source loopback used by the Swift tests).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
enricobuehlerandClaude Fable 5