New crate crates/punktfunk-client-linux (binary punktfunk-client), the
native Linux client on the Option A architecture (2026-06-12 research):
- GTK4/libadwaita shell linking punktfunk-core directly (no C ABI):
mDNS host list, TOFU fingerprint prompt, SPAKE2 PIN pairing dialog,
preferences (mode/bitrate/gamepad/shortcut capture), stats overlay,
--connect host[:port] for scripting.
- Video: FFmpeg software HEVC decode (LOW_DELAY, slice threads) ->
RGBA -> GdkMemoryTexture inside GtkGraphicsOffload (the dmabuf
subsurface path lights up when VAAPI lands; black-background keeps
fullscreen scanout-eligible).
- Audio: Opus -> PipeWire playback stream, the host virtual-mic's
adaptive jitter ring inverted.
- Input: keyboard as the exact inverse of the host VK table (evdev
keycodes, layout-independent; unit-tested), absolute mouse through
the Contain-fit transform, WHEEL_DELTA(120) scroll, compositor
shortcut inhibition while streaming, Ctrl+Alt+Shift+Q release chord,
F11 fullscreen. SDL3 gamepad capture (single pad-0 model) + rumble
and DualSense lightbar feedback on the same thread.
- Session pump owns video+audio pulls; the gamepad thread owns
rumble+hidout — possible because NativeClient's plane receivers are
now mutexed, making it Sync (Arc-shared, compiler-verified per-plane
contract instead of the ABI's manual assertion).
- Linux-gated deps + a stub main keep cargo build --workspace green on
macOS.
Validated live against serve --native on this box: 1920x1080@60,
locked 60 fps, capture->decoded p50 ~6.4 ms (software decode, debug
build). Teardown keys off AdwNavigationPage::hidden — NavigationView
push fires a transient unmap/map cycle that must not end the session.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
