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punktfunk/crates
enricobuehler 118758ff0b
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fix(pad-audio): the Linux pad sink speaks GE-Proton's AUX0-3 channel shape
A field report (GE-Proton 11-5, real DualSense on-host) surfaced the missing
constraint: haptics only work when the pad's card runs the Pro Audio profile —
because GE's route opens the node through its bundled pipewire-alsa plugin
with aux_channels=1, and its pulse fallback forces a PA AUX0..3 map with
stream.dont-remix (proton-ds5-haptic patches 0013/0115/0116: "the hidden
PipeWire parent for a DualSense output exposes AUX0 through AUX3"). A
positioned FL FR RL RR sink puts those writers through position channelmix
instead of index passthrough.

The sink now advertises AUX0..AUX3. Proven on the box: an AUX-mapped
rear-pair-only tone captures index-exact (speaker pair 0.0000, coil pair
0.3662); a positioned stray stream folds into the speaker pair and never
excites the coils. The devtest reports per-pair peaks so exactly this class
of remix bug is visible.

Also confirmed from the GE patch set while here: device matching is
device.bus/vendor.id/product.id + the Sony/Wireless_Controller name
substrings (both of which the sink carries), and the MMDevice container is
now synthesized from the wine-side HID USB parent (patch 0112) — the old
pure-PW-node GUID_NULL concern no longer applies on GE >= 11-4.
2026-08-12 18:53:35 +02:00
..