[Feature] Deadzone removal (aka antideadzone)

[Switch123456789]

Many controllers have some sort of own internal deadzone (e.g. Razer Wolverine v2). Many games have a fixed deadzone (mostly 25% like GTA V). This makes for a horrible experience, therefore having a antideadzone feature would be a blessing.

I used to use SteamInput to work around that, however they never fixed a bug that shifts the antideadzone when a sensitivity-curve is applied. But worse, to this day, neither Steam nor the Steam Overlay (which includes SteamInput) do support native Wayland, despite people desperately begging for it. Using xwayland comes with plenty of other flaws (bad performance, crashes & glitches in some games). Also I tried other tools like Input Remapper, SC-Controller & more, but they are all heavily flawed in their own way. So Input Plumber seems to be the perfect fit for these features imo.

In case the concept isn't exactly clear: What antideadzone does is to change the output-range. For example if set to 25%: If the stick is centered, the output will be 0% but if you move the stick, the range will go from 25% - 100%, skipping the range 0% - 25% that a game like GTA V doesn't react to due to hardcoded deadzone of 25%.

[pastaq]

This is an interesting idea & shouldn't be too difficult to implement. I assume this would need to be user configurable so we would need to add it to the dbus & cli interfaces, probably at the composite device level.