A game's DualSense output report bundles rumble + lightbar + player-LEDs
+ adaptive-triggers into one report, so a pad that is merely rumbling
re-sends its unchanged lightbar / LED / trigger state on every output
report. The managers already dedup rumble, but forwarded every rich
`HidOutput` event verbatim — flooding the 0xCD feedback plane to the
client during continuous rumble.
Add a shared `HidoutDedup` (dualsense_proto, used by both the Linux UHID
and Windows UMDF managers) that forwards Led/PlayerLeds/Trigger only on a
value change (per side for the two triggers) and always forwards one-shot
TrackpadHaptic pulses — mirroring the rumble dedup two lines above and the
DS4 backend's lightbar dedup. Reset per pad on create/unplug.
Verified on Linux .21 (clippy -D warnings clean, new HidoutDedup unit
test + full suite green); Windows .173 with the rest of Phase 3.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler
59fc820226