Add Support for iPhone/iPad internal motion sensor

[Danos0100]

Is your feature request related to a problem? Please describe.
When building from source (the commit is yet to be added into the build on the App Store), you can access the DS4/DS5 gyro and acceleration sensor and use it for a virtual DS4 Controller in Sunshine (nightly). However, there are controllers, whose motion input is not supported (Switch Pro Controller) or who don't have a dedicated motion sensor ("Switch Style" iPhone Gamepads like the Razer Kishi for example). In that case, no motion data is transferred.

Describe the solution you'd like
Offering a fallback if no motion input is exposed by the iOS Controller API would seem a pretty straightforward solution. That way, the iPhone's own acceleration and gyro would be used, thus removing the need for a separate controller with motion control (Steam Link does this as well, but for some reason, its FPS performance is way worse than Sunshine/Moonlight, although my system should handle it just fine. Plus Sunshine offers HDR)

[Danos0100]

As motion has been added to the stable channels of Sunshine and Moonlight, I'd like to push this issue/request. Maybe one could have a toggle to choose which gyro to use, just like it's the case with the on screen controller buttons. Something like
Gyro
(Controller (if available) | Phone | Auto | Off)

[louisdefromont]

It looks like the gyro is being used for android devices (moonlight-stream/moonlight-android#1155). Hopefully, something similar can be done for iOS

[Danos0100]

It looks like the gyro is being used for android devices (moonlight-stream/moonlight-android#1155). Hopefully, something similar can be done for iOS

Having taken a quick look at how Moonlight handles gyro input, it should definitely be possible to implement something similar on Moonlight iOS, by using the correspondig APIs. Unfortunately I am far from skilled enough to implement such a thing :(

[systox]

Bump. Need this also.

[Danos0100]

I actually managed to implement it, however this still needs an UI implementation, because my Controller Grip (GameSir G8) emulates a DS5, thus sending dummy motion data (0,0,0,0,0,0) towards the iPhone. Because of this, it needs a toggle to overwrite the Allegedly motion data from the G8 with the iPhone motion data (so a switch to always use iPhone motion data even if there is a controller connected).

if anybody could help me out with implementing a three state switch (auto [controller if connected, else iPhone], always controller, always iPhone) to the UI (the positions seem pretty hardcoded?), we could get this working!

[Danos0100]

(Bump, i'd really like to get this going, but UI still looks kinda hard to understand for me)

[Danos0100]

Okay, finally managed to understand the UI and the settings. It works. (Whohoooo!) Some Cleanup and I got to read into getting this into a pull request. As moonlight-ios seems pretty on halt atm, I will try to get this working in the https://github.com/Moonlight-the-Fried-Fish/moonlight-ios-NativeMultiTouchPassthrough fork, which seems to get updated more regularly at the moment.

[Danos0100]

Enjoy #664 (comment)