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Forward rumble back to the guest controller (both backends)

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The XInput hook used to swallow XInputSetState; now it records the requested
left/right motor speeds into the status back-channel (protocol v8->v9: per-slot
rumble_left/right in HookStatus). Each frame the host reads them and, only on
change, drives the guest's actuator via the active backend:
- XInput: XInputSetState on the guest's slot (the open question is whether Steam's
  RPT virtual pad accepts vibration and routes it to the guest -- needs live RPT);
- Steam Input: SteamInput TriggerVibration on the slot's controller handle, with the
  XInput fallback for slots Steam isn't driving.

InputSource gains a set_rumble(slot,left,right) hook (default no-op) implemented by
both backends; SteamInputSource now tracks per-slot controller handles + which slots
it drives.

Verified: hook_selftest (x64 + x86) now asserts the hook records the rumble from
XInputSetState into the status; full build x64 + x86 clean; ctest x64 9/9, x86 3/3.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
BlackMark
2026-06-21 05:11:33 +02:00
parent 7673f186db
commit 056a478e19
13 changed files with 108 additions and 13 deletions
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12
hook/src/xinput_hook.cpp
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@@ -138,16 +138,20 @@ DWORD WINAPI hk_XInputGetCapabilities(DWORD user_index, DWORD /*flags*/, XINPUT_
return ERROR_SUCCESS;
}
// Swallow rumble: it would otherwise be sent to whatever physical device sits at
// this index on the host machine. Forwarding it back to the guest is a later
// phase; for now report success so the game's logic is happy.
DWORD WINAPI hk_XInputSetState(DWORD user_index, XINPUT_VIBRATION* /*vibration*/)
// Don't drive a physical device at this index on the host; instead record the
// requested motor speeds so the host can forward them to the guest's controller.
// Still report success so the game's logic is happy.
DWORD WINAPI hk_XInputSetState(DWORD user_index, XINPUT_VIBRATION* vibration)
{
hook_note_call(g_id_setstate);
if (user_index >= kMaxPads || !g_cache[user_index].connected)
{
return ERROR_DEVICE_NOT_CONNECTED;
}
if (g_ipc != nullptr && vibration != nullptr)
{
g_ipc->note_rumble(user_index, vibration->wLeftMotorSpeed, vibration->wRightMotorSpeed);
}
return ERROR_SUCCESS;
}