Matching GCController and IOHIDDeviceRef

Question

shchvova OP

Created Nov ’15

Replies 2

Boosts 0

Views 1.5k

Participants 3

Hello!

I encountered a problem in my OS X app. I'm using both IOKit HID devices and GameController.framework devices.

Problem is, all GCController devices have HID devices, and I didn't find any way of matching them.

So, here are questions:

1. Is there a way to say "this

IOHIDDeviceRef

device is MFi controller which would be handled by GameController.framework"?

2. This

GCController

and

IOHIDDeviceRef

object refer to same physical controller and I can ignore/blacklist one of them in my code to avoid duplications

N.B.

There is

[GCController deviceRef]

field. In fact it is

IOHIDDeviceRef

, so I can get their

IOHIDDeviceGetService

and then

IORegistryEntryGetRegistryEntryID

to see if they're same connected device.

Problem is -

deviceRef

is a private field. I'm not sure if I can use it when submitting app to App Store

Boost

Answer 1

step_jac OP

Dec ’21

Wow, 6 years ago and find a post about a current issue.

We are hitting the same issue with an SDL2 based app whereby MFi / IOKit compatible controllers (PS/XB/Switch Pro) get detected twice resulting in the appearance that 2 gamepads are connected when there is only 1 in actuality. Is there a method for filtering this out to avoid duplicates?

0

Answer 2

step_jac OP

Dec ’21

Looks like as of OSX 11, GCController implements supportsHIDDevice: which should allow for filtering duplicates. This is used within SDL2 but likely a bug or order of operations issue depending on whether GC or IOKit detects first.

0