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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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20
host/src/main.cpp
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@@ -117,6 +117,10 @@ int run()
coop::UiState ui;
coop::FrameStats stats;
// Last rumble forwarded per slot, so we only re-send on change.
std::uint16_t last_rumble_l[coop::kMaxPads] = {};
std::uint16_t last_rumble_r[coop::kMaxPads] = {};
while (window.pump_messages())
{
#ifdef COOP_WITH_STEAM
@@ -148,6 +152,22 @@ int run()
injection.set_test_input(controllers.test_input()); // toggle lives in the Controllers panel
injection.publish(input->pads());
injection.tick(); // refresh target liveness before the mirror panels read game_hwnd()
// Forward the rumble the game requested back to the guest's controller (only
// when it changes, to avoid spamming XInputSetState / TriggerVibration).
{
const coop::HookStatusView hs = injection.hook_status();
for (int i = 0; i < static_cast<int>(coop::kMaxPads); ++i)
{
if (hs.rumble_left[i] != last_rumble_l[i] || hs.rumble_right[i] != last_rumble_r[i])
{
input->set_rumble(i, hs.rumble_left[i], hs.rumble_right[i]);
last_rumble_l[i] = hs.rumble_left[i];
last_rumble_r[i] = hs.rumble_right[i];
}
}
}
const HWND game = injection.game_hwnd();
capture.set_target(game);
audio.set_target(game);