Lossless Adapter (GameCube Controller Adapter) support

[AL2009man]

Input Integrity's Lossless Adapter (https://www.input-integrity.com/) is, for all intents and purposes: an low-latency adapter for GameCube Controllers for PC.

I've been talking to someone while trying to do some verifications for GameCube Controller support (while learning about GameCube Controller on USB Adapters at the same time), they happen to have a third-party GameCube Adapter (which they revealed to be Lossless Adapter) and wanted to test it on Steam client.

normally: you'd need Zadig to do a driver swap inorder to get GameCube support to work for this, and it's something i've noticed in most tutorials during my research. Lossless Adapter apparently doesn't need it.

According to said claim: when on Console mode; Lossless Adapter works on every game and program, even in Dolphin (that's to be expected)....but not on Steam Client and in extension: SDL.

[slouken]

Feel free to create a PR for this!

[AL2009man]

Feel free to create a PR for this!

i don't have the skills to do that...but the owner provided me the VID/PID! it should be VID_057E & PID_0337 if I got the text format correct.

[slouken]

Yeah, that's not super helpful, that's the VID/PID for the standard GameCube controller adapter. I'm curious why it wouldn't work out of the box with SDL, since we already support the normal adapter.

Please let them know I'm happy to do a debug session over Zoom and they can contact me to coordinate at slouken@libsdl.org.

[AL2009man]

btw, i just so happen to be talking with @mitchellcairns (from the SInput/Hand Held Legends series) at the same time. They also confirmed to me that, even with libusb and zadig: it doesn't work.

[mitchellcairns]

Chiming in, I also have the lossless adapter and a Nintendo brand adapter, neither seem to get picked up by Steam. I also checked with Wireshark and it doesn't seem any packets are sent to/from the adapter.