intentionally add input lag for fair parsec VS

[Mistawani]

Hi everyone,

is this possible to create a feature for intentionnaly add input lag, like a slider to choose between "1 to 5 frames" or whatever.
it will be usefull when i play with a friend a fighting game via parsec, for simulate the same input lag of the guest.

i saw the ds4 BT poll rate option who can give potentially "16 ms" of lag so 1 frame, but it's not enough and it will be cool if it work wired.

i dont know if a request must be done here or in issue section.

Thank you for reading.

[Ryochan7]

Part of the whole goal of this project has been to reduce input lag as much as possible and allow for more customized mapping. Never would have considered intentional adding input lag back in.

Besides the DS4 BT Poll rate setting, one other possible avenue would be to increase the input buffer size used by Windows via the HidD_SetNumInputBuffers system call. Currently using a buffer size of 3 for DS4 controllers. I want to believe the default in Windows is set to something like 20 elements but I am likely mistaken. For reference, the minimum allowed buffer size is 2 elements.

[Mistawani]

I totally understand your point of view and i always did my best for reduce input lag, but for the specific case of "parsec fair and competitive" it will be a good option. I play a game called "aquapazza" for ps3 with a friend, and today its only playable online via emulation and parsec.
But when i host a game, i have the advantage of having 1 at 2 frame less than the guest.

Anyway thank you for your work ryochan, i will give a shot to your "HidD_SetNumInputBuffers system call" possible solution.

[Yohoki]

...That's.... an..... interesting request....?

But, it is actually (kinda) already possible.

When you create a profile, instead of binding a button, bind a macro with the "Record a Macro" button above the mouse. You can then hit "Record" and press the button you want to press. Hit "Stop", and before saving, click the first line of the record, and then hit "Insert wait". You'll now have a 100ms delay, then the button press to simulate lag. Many games will also need a slight delay between the button press and lift. A 5-10ms delay should be more than enough to seem human. Set this up for each button and you should be good to go. The only issue I can see is that it won't let you hold the button, but you should be able to easily do a single press of either a keyboard or controller button. It should end up looking something like this:

Just tried this out on PlateUp, which requires holding the button for some tasks. Holding the button no longer works, but single presses are delayed just enough to be annoying. So, if you don't need to hold any buttons, this should work just fine and you can tune the delays how you need.

If you need a more precise control, like being able to tell the difference between pressing or holding buttons, that could be done with an AutoHotKey script. It's much more specialized for this kind of automation.

[Mistawani]

Thank you for your answer, but i already try this method before, the exact same way ^^. And yeah u cannot hold buttons, and it is not possible for my use.

I tried with ahk too but without success :'(