[MrTarantula]

If the button was held for 100ms, do you emulate a button press from 100ms to 200ms? If the button was held for 900ms, do you emulate a 900ms-long button press until 1800ms after the initial press?

If it doesn't reach the threshold for longpress, then the duration shouldn't really matter. Just send a default button press, if such a thing exists. The shortest amount of time for libretro to register the press. I'd like to see someone try to press a button twice in 5ms.

So that's the challenge: if the button is held for less than 1000ms, when do we send a button press to the game? When do we send a release? What if the button is repressed before the release is sent?

For the typical longpress buttons (Start, Select, Home, PS, XB) timing isn't that important to me. If the joystick API handles things like OnButtonDown and OnButtonUp, you could:

1. Detect the pause button is currently being pressed and queue up the default action (prepare to emulate it but wait to execute)
   
2. When button press passes the threshold for longpress, send the longpress action. I wouldn't even wait for OnButtonUp
   
3. If threshold isn't reached, then send the default action when OnButtonUp is called. Like I said, length of the press shouldn't matter if threshold isn't reached