From cb16d20f2d4ed1ebf150b6ba4d64fe469c1263f1 Mon Sep 17 00:00:00 2001
From: JosJuice <josjuice@gmail.com>
Date: Sun, 21 Mar 2021 20:27:00 +0100
Subject: [PATCH] ControllerEmu: Add new "input override" system

---
 Source/Core/Core/HW/GCPadEmu.cpp              | 13 +--
 Source/Core/Core/HW/WiimoteEmu/Dynamics.cpp   |  6 +-
 Source/Core/Core/HW/WiimoteEmu/Dynamics.h     |  4 +-
 .../Core/HW/WiimoteEmu/Extension/Classic.cpp  | 19 ++--
 .../WiimoteEmu/Extension/DrawsomeTablet.cpp   |  4 +-
 .../Core/HW/WiimoteEmu/Extension/Drums.cpp    |  7 +-
 .../Core/HW/WiimoteEmu/Extension/Guitar.cpp   | 15 +--
 .../Core/HW/WiimoteEmu/Extension/Nunchuk.cpp  | 37 +++++---
 .../Core/HW/WiimoteEmu/Extension/TaTaCon.cpp  |  4 +-
 .../HW/WiimoteEmu/Extension/Turntable.cpp     | 13 +--
 Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp | 95 ++++++++++++++++---
 Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h   | 14 ++-
 .../ControlGroup/AnalogStick.cpp              | 29 ++++++
 .../ControllerEmu/ControlGroup/AnalogStick.h  |  2 +
 .../ControllerEmu/ControlGroup/Buttons.h      | 17 ++++
 .../ControllerEmu/ControlGroup/ControlGroup.h |  7 ++
 .../ControllerEmu/ControlGroup/Cursor.cpp     | 25 +++--
 .../ControllerEmu/ControlGroup/Cursor.h       |  3 +
 .../ControlGroup/MixedTriggers.cpp            | 48 ++++++++++
 .../ControlGroup/MixedTriggers.h              |  2 +
 .../ControllerEmu/ControlGroup/Slider.cpp     | 17 ++++
 .../ControllerEmu/ControlGroup/Slider.h       |  3 +
 .../ControllerEmu/ControlGroup/Triggers.cpp   | 22 +++++
 .../ControllerEmu/ControlGroup/Triggers.h     |  1 +
 .../ControllerEmu/ControllerEmu.cpp           | 12 +++
 .../InputCommon/ControllerEmu/ControllerEmu.h |  6 ++
 .../InputCommon/ControllerEmu/StickGate.h     |  4 +
 27 files changed, 355 insertions(+), 74 deletions(-)

diff --git a/Source/Core/Core/HW/GCPadEmu.cpp b/Source/Core/Core/HW/GCPadEmu.cpp
index e387d4765a..94f1605edb 100644
--- a/Source/Core/Core/HW/GCPadEmu.cpp
+++ b/Source/Core/Core/HW/GCPadEmu.cpp
@@ -138,14 +138,15 @@ GCPadStatus GCPad::GetInput() const
   const auto lock = GetStateLock();
   GCPadStatus pad = {};
 
-  if (!(m_always_connected_setting.GetValue() || IsDefaultDeviceConnected()))
+  if (!(m_always_connected_setting.GetValue() || IsDefaultDeviceConnected() ||
+        m_input_override_function))
   {
     pad.isConnected = false;
     return pad;
   }
 
   // buttons
-  m_buttons->GetState(&pad.button, button_bitmasks);
+  m_buttons->GetState(&pad.button, button_bitmasks, m_input_override_function);
 
   // set analog A/B analog to full or w/e, prolly not needed
   if (pad.button & PAD_BUTTON_A)
@@ -154,20 +155,20 @@ GCPadStatus GCPad::GetInput() const
     pad.analogB = 0xFF;
 
   // dpad
-  m_dpad->GetState(&pad.button, dpad_bitmasks);
+  m_dpad->GetState(&pad.button, dpad_bitmasks, m_input_override_function);
 
   // sticks
-  const auto main_stick_state = m_main_stick->GetState();
+  const auto main_stick_state = m_main_stick->GetState(m_input_override_function);
   pad.stickX = MapFloat<u8>(main_stick_state.x, GCPadStatus::MAIN_STICK_CENTER_X, 1);
   pad.stickY = MapFloat<u8>(main_stick_state.y, GCPadStatus::MAIN_STICK_CENTER_Y, 1);
 
-  const auto c_stick_state = m_c_stick->GetState();
+  const auto c_stick_state = m_c_stick->GetState(m_input_override_function);
   pad.substickX = MapFloat<u8>(c_stick_state.x, GCPadStatus::C_STICK_CENTER_X, 1);
   pad.substickY = MapFloat<u8>(c_stick_state.y, GCPadStatus::C_STICK_CENTER_Y, 1);
 
   // triggers
   std::array<ControlState, 2> triggers;
-  m_triggers->GetState(&pad.button, trigger_bitmasks, triggers.data());
+  m_triggers->GetState(&pad.button, trigger_bitmasks, triggers.data(), m_input_override_function);
   pad.triggerLeft = MapFloat<u8>(triggers[0], 0);
   pad.triggerRight = MapFloat<u8>(triggers[1], 0);
 
diff --git a/Source/Core/Core/HW/WiimoteEmu/Dynamics.cpp b/Source/Core/Core/HW/WiimoteEmu/Dynamics.cpp
index 4b4109a119..dd21cd721a 100644
--- a/Source/Core/Core/HW/WiimoteEmu/Dynamics.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/Dynamics.cpp
@@ -5,6 +5,7 @@
 
 #include <algorithm>
 #include <cmath>
+#include <optional>
 
 #include "Common/MathUtil.h"
 #include "Core/Config/SYSCONFSettings.h"
@@ -221,9 +222,10 @@ WiimoteCommon::AccelData ConvertAccelData(const Common::Vec3& accel, u16 zero_g,
        u16(std::clamp(std::lround(scaled_accel.z + zero_g), 0l, MAX_VALUE))});
 }
 
-void EmulatePoint(MotionState* state, ControllerEmu::Cursor* ir_group, float time_elapsed)
+void EmulatePoint(MotionState* state, ControllerEmu::Cursor* ir_group,
+                  const ControllerEmu::InputOverrideFunction& override_func, float time_elapsed)
 {
-  const auto cursor = ir_group->GetState(true);
+  const auto cursor = ir_group->GetState(true, override_func);
 
   if (!cursor.IsVisible())
   {
diff --git a/Source/Core/Core/HW/WiimoteEmu/Dynamics.h b/Source/Core/Core/HW/WiimoteEmu/Dynamics.h
index 2933fbb7c3..08b3cbda9a 100644
--- a/Source/Core/Core/HW/WiimoteEmu/Dynamics.h
+++ b/Source/Core/Core/HW/WiimoteEmu/Dynamics.h
@@ -15,6 +15,7 @@
 #include "InputCommon/ControllerEmu/ControlGroup/IMUCursor.h"
 #include "InputCommon/ControllerEmu/ControlGroup/IMUGyroscope.h"
 #include "InputCommon/ControllerEmu/ControlGroup/Tilt.h"
+#include "InputCommon/ControllerEmu/ControllerEmu.h"
 
 namespace WiimoteEmu
 {
@@ -81,7 +82,8 @@ void ApproachAngleWithAccel(RotationalState* state, const Common::Vec3& target,
 void EmulateShake(PositionalState* state, ControllerEmu::Shake* shake_group, float time_elapsed);
 void EmulateTilt(RotationalState* state, ControllerEmu::Tilt* tilt_group, float time_elapsed);
 void EmulateSwing(MotionState* state, ControllerEmu::Force* swing_group, float time_elapsed);
-void EmulatePoint(MotionState* state, ControllerEmu::Cursor* ir_group, float time_elapsed);
+void EmulatePoint(MotionState* state, ControllerEmu::Cursor* ir_group,
+                  const ControllerEmu::InputOverrideFunction& override_func, float time_elapsed);
 void EmulateIMUCursor(IMUCursorState* state, ControllerEmu::IMUCursor* imu_ir_group,
                       ControllerEmu::IMUAccelerometer* imu_accelerometer_group,
                       ControllerEmu::IMUGyroscope* imu_gyroscope_group, float time_elapsed);
diff --git a/Source/Core/Core/HW/WiimoteEmu/Extension/Classic.cpp b/Source/Core/Core/HW/WiimoteEmu/Extension/Classic.cpp
index 3cdc02e0b3..24ab805a86 100644
--- a/Source/Core/Core/HW/WiimoteEmu/Extension/Classic.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/Extension/Classic.cpp
@@ -113,7 +113,8 @@ void Classic::BuildDesiredExtensionState(DesiredExtensionState* target_state)
 
   // left stick
   {
-    const ControllerEmu::AnalogStick::StateData left_stick_state = m_left_stick->GetState();
+    const ControllerEmu::AnalogStick::StateData left_stick_state =
+        m_left_stick->GetState(m_input_override_function);
 
     const u8 x = static_cast<u8>(LEFT_STICK_CENTER + (left_stick_state.x * LEFT_STICK_RADIUS));
     const u8 y = static_cast<u8>(LEFT_STICK_CENTER + (left_stick_state.y * LEFT_STICK_RADIUS));
@@ -123,7 +124,8 @@ void Classic::BuildDesiredExtensionState(DesiredExtensionState* target_state)
 
   // right stick
   {
-    const ControllerEmu::AnalogStick::StateData right_stick_data = m_right_stick->GetState();
+    const ControllerEmu::AnalogStick::StateData right_stick_data =
+        m_right_stick->GetState(m_input_override_function);
 
     const u8 x = static_cast<u8>(RIGHT_STICK_CENTER + (right_stick_data.x * RIGHT_STICK_RADIUS));
     const u8 y = static_cast<u8>(RIGHT_STICK_CENTER + (right_stick_data.y * RIGHT_STICK_RADIUS));
@@ -135,19 +137,20 @@ void Classic::BuildDesiredExtensionState(DesiredExtensionState* target_state)
 
   // triggers
   {
-    ControlState trigs[2] = {0, 0};
-    m_triggers->GetState(&buttons, classic_trigger_bitmasks.data(), trigs);
+    ControlState triggers[2] = {0, 0};
+    m_triggers->GetState(&buttons, classic_trigger_bitmasks.data(), triggers,
+                         m_input_override_function);
 
-    const u8 lt = static_cast<u8>(trigs[0] * TRIGGER_RANGE);
-    const u8 rt = static_cast<u8>(trigs[1] * TRIGGER_RANGE);
+    const u8 lt = static_cast<u8>(triggers[0] * TRIGGER_RANGE);
+    const u8 rt = static_cast<u8>(triggers[1] * TRIGGER_RANGE);
 
     classic_data.SetLeftTrigger(lt);
     classic_data.SetRightTrigger(rt);
   }
 
   // buttons and dpad
-  m_buttons->GetState(&buttons, classic_button_bitmasks.data());
-  m_dpad->GetState(&buttons, classic_dpad_bitmasks.data());
+  m_buttons->GetState(&buttons, classic_button_bitmasks.data(), m_input_override_function);
+  m_dpad->GetState(&buttons, classic_dpad_bitmasks.data(), m_input_override_function);
 
   classic_data.SetButtons(buttons);
 
diff --git a/Source/Core/Core/HW/WiimoteEmu/Extension/DrawsomeTablet.cpp b/Source/Core/Core/HW/WiimoteEmu/Extension/DrawsomeTablet.cpp
index 9a0d16790e..e093c9ac67 100644
--- a/Source/Core/Core/HW/WiimoteEmu/Extension/DrawsomeTablet.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/Extension/DrawsomeTablet.cpp
@@ -47,7 +47,7 @@ void DrawsomeTablet::BuildDesiredExtensionState(DesiredExtensionState* target_st
   constexpr double CENTER_X = (MAX_X + MIN_X) / 2.0;
   constexpr double CENTER_Y = (MAX_Y + MIN_Y) / 2.0;
 
-  const auto stylus_state = m_stylus->GetState();
+  const auto stylus_state = m_stylus->GetState(m_input_override_function);
   const auto stylus_x = u16(std::lround(CENTER_X + stylus_state.x * (MAX_X - CENTER_X)));
   const auto stylus_y = u16(std::lround(CENTER_Y + stylus_state.y * (MAX_Y - CENTER_Y)));
 
@@ -74,7 +74,7 @@ void DrawsomeTablet::BuildDesiredExtensionState(DesiredExtensionState* target_st
   // Pressure (0 - 0x7ff):
   constexpr u16 MAX_PRESSURE = 0x7ff;
 
-  const auto touch_state = m_touch->GetState();
+  const auto touch_state = m_touch->GetState(m_input_override_function);
   const auto pressure = u16(std::lround(touch_state.data[0] * MAX_PRESSURE));
 
   tablet_data.pressure1 = u8(pressure);
diff --git a/Source/Core/Core/HW/WiimoteEmu/Extension/Drums.cpp b/Source/Core/Core/HW/WiimoteEmu/Extension/Drums.cpp
index 0a37f278d2..01ca315843 100644
--- a/Source/Core/Core/HW/WiimoteEmu/Extension/Drums.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/Extension/Drums.cpp
@@ -84,17 +84,18 @@ void Drums::BuildDesiredExtensionState(DesiredExtensionState* target_state)
   DesiredState& state = target_state->data.emplace<DesiredState>();
 
   {
-    const ControllerEmu::AnalogStick::StateData stick_state = m_stick->GetState();
+    const ControllerEmu::AnalogStick::StateData stick_state =
+        m_stick->GetState(m_input_override_function);
 
     state.stick_x = MapFloat(stick_state.x, STICK_CENTER, STICK_MIN, STICK_MAX);
     state.stick_y = MapFloat(stick_state.y, STICK_CENTER, STICK_MIN, STICK_MAX);
   }
 
   state.buttons = 0;
-  m_buttons->GetState(&state.buttons, drum_button_bitmasks.data());
+  m_buttons->GetState(&state.buttons, drum_button_bitmasks.data(), m_input_override_function);
 
   state.drum_pads = 0;
-  m_pads->GetState(&state.drum_pads, drum_pad_bitmasks.data());
+  m_pads->GetState(&state.drum_pads, drum_pad_bitmasks.data(), m_input_override_function);
 
   state.softness = u8(7 - std::lround(m_hit_strength_setting.GetValue() * 7 / 100));
 }
diff --git a/Source/Core/Core/HW/WiimoteEmu/Extension/Guitar.cpp b/Source/Core/Core/HW/WiimoteEmu/Extension/Guitar.cpp
index cd86a04a32..2776eaef87 100644
--- a/Source/Core/Core/HW/WiimoteEmu/Extension/Guitar.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/Extension/Guitar.cpp
@@ -101,7 +101,8 @@ void Guitar::BuildDesiredExtensionState(DesiredExtensionState* target_state)
 
   // stick
   {
-    const ControllerEmu::AnalogStick::StateData stick_state = m_stick->GetState();
+    const ControllerEmu::AnalogStick::StateData stick_state =
+        m_stick->GetState(m_input_override_function);
 
     guitar_data.sx = static_cast<u8>((stick_state.x * STICK_RADIUS) + STICK_CENTER);
     guitar_data.sy = static_cast<u8>((stick_state.y * STICK_RADIUS) + STICK_CENTER);
@@ -111,7 +112,8 @@ void Guitar::BuildDesiredExtensionState(DesiredExtensionState* target_state)
   if (m_slider_bar->controls[0]->control_ref->BoundCount() &&
       m_slider_bar->controls[1]->control_ref->BoundCount())
   {
-    const ControllerEmu::Slider::StateData slider_data = m_slider_bar->GetState();
+    const ControllerEmu::Slider::StateData slider_data =
+        m_slider_bar->GetState(m_input_override_function);
 
     guitar_data.sb = s_slider_bar_control_codes.lower_bound(slider_data.value)->second;
   }
@@ -122,17 +124,18 @@ void Guitar::BuildDesiredExtensionState(DesiredExtensionState* target_state)
   }
 
   // whammy bar
-  const ControllerEmu::Triggers::StateData whammy_state = m_whammy->GetState();
+  const ControllerEmu::Triggers::StateData whammy_state =
+      m_whammy->GetState(m_input_override_function);
   guitar_data.whammy = static_cast<u8>(whammy_state.data[0] * 0x1F);
 
   // buttons
-  m_buttons->GetState(&guitar_data.bt, guitar_button_bitmasks.data());
+  m_buttons->GetState(&guitar_data.bt, guitar_button_bitmasks.data(), m_input_override_function);
 
   // frets
-  m_frets->GetState(&guitar_data.bt, guitar_fret_bitmasks.data());
+  m_frets->GetState(&guitar_data.bt, guitar_fret_bitmasks.data(), m_input_override_function);
 
   // strum
-  m_strum->GetState(&guitar_data.bt, guitar_strum_bitmasks.data());
+  m_strum->GetState(&guitar_data.bt, guitar_strum_bitmasks.data(), m_input_override_function);
 
   // flip button bits
   guitar_data.bt ^= 0xFFFF;
diff --git a/Source/Core/Core/HW/WiimoteEmu/Extension/Nunchuk.cpp b/Source/Core/Core/HW/WiimoteEmu/Extension/Nunchuk.cpp
index 73f73aadd0..18452641ac 100644
--- a/Source/Core/Core/HW/WiimoteEmu/Extension/Nunchuk.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/Extension/Nunchuk.cpp
@@ -67,29 +67,34 @@ void Nunchuk::BuildDesiredExtensionState(DesiredExtensionState* target_state)
   DataFormat nc_data = {};
 
   // stick
-  const ControllerEmu::AnalogStick::StateData stick_state = m_stick->GetState();
+  bool override_occurred = false;
+  const ControllerEmu::AnalogStick::StateData stick_state =
+      m_stick->GetState(m_input_override_function, &override_occurred);
   nc_data.jx = u8(STICK_CENTER + stick_state.x * STICK_RADIUS);
   nc_data.jy = u8(STICK_CENTER + stick_state.y * STICK_RADIUS);
 
-  // Some terribly coded games check whether to move with a check like
-  //
-  //     if (x != 0 && y != 0)
-  //         do_movement(x, y);
-  //
-  // With keyboard controls, these games break if you simply hit
-  // of the axes. Adjust this if you're hitting one of the axes so that
-  // we slightly tweak the other axis.
-  if (nc_data.jx != STICK_CENTER || nc_data.jy != STICK_CENTER)
+  if (!override_occurred)
   {
-    if (nc_data.jx == STICK_CENTER)
-      ++nc_data.jx;
-    if (nc_data.jy == STICK_CENTER)
-      ++nc_data.jy;
+    // Some terribly coded games check whether to move with a check like
+    //
+    //     if (x != 0 && y != 0)
+    //         do_movement(x, y);
+    //
+    // With keyboard controls, these games break if you simply hit one
+    // of the axes. Adjust this if you're hitting one of the axes so that
+    // we slightly tweak the other axis.
+    if (nc_data.jx != STICK_CENTER || nc_data.jy != STICK_CENTER)
+    {
+      if (nc_data.jx == STICK_CENTER)
+        ++nc_data.jx;
+      if (nc_data.jy == STICK_CENTER)
+        ++nc_data.jy;
+    }
   }
 
   // buttons
   u8 buttons = 0;
-  m_buttons->GetState(&buttons, nunchuk_button_bitmasks.data());
+  m_buttons->GetState(&buttons, nunchuk_button_bitmasks.data(), m_input_override_function);
   nc_data.SetButtons(buttons);
 
   // Acceleration data:
@@ -108,6 +113,8 @@ void Nunchuk::BuildDesiredExtensionState(DesiredExtensionState* target_state)
   // shake
   accel += m_shake_state.acceleration;
 
+  accel = Wiimote::OverrideVec3(m_imu_accelerometer, accel, m_input_override_function);
+
   // Calibration values are 8-bit but we want 10-bit precision, so << 2.
   const auto acc = ConvertAccelData(accel, ACCEL_ZERO_G << 2, ACCEL_ONE_G << 2);
   nc_data.SetAccel(acc.value);
diff --git a/Source/Core/Core/HW/WiimoteEmu/Extension/TaTaCon.cpp b/Source/Core/Core/HW/WiimoteEmu/Extension/TaTaCon.cpp
index 04c13dc961..f81825a0ff 100644
--- a/Source/Core/Core/HW/WiimoteEmu/Extension/TaTaCon.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/Extension/TaTaCon.cpp
@@ -54,8 +54,8 @@ void TaTaCon::BuildDesiredExtensionState(DesiredExtensionState* target_state)
 {
   DataFormat tatacon_data = {};
 
-  m_center->GetState(&tatacon_data.state, center_bitmasks.data());
-  m_rim->GetState(&tatacon_data.state, rim_bitmasks.data());
+  m_center->GetState(&tatacon_data.state, center_bitmasks.data(), m_input_override_function);
+  m_rim->GetState(&tatacon_data.state, rim_bitmasks.data(), m_input_override_function);
 
   // Flip button bits.
   tatacon_data.state ^= 0xff;
diff --git a/Source/Core/Core/HW/WiimoteEmu/Extension/Turntable.cpp b/Source/Core/Core/HW/WiimoteEmu/Extension/Turntable.cpp
index aaa928686f..7c8c36f127 100644
--- a/Source/Core/Core/HW/WiimoteEmu/Extension/Turntable.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/Extension/Turntable.cpp
@@ -86,7 +86,8 @@ void Turntable::BuildDesiredExtensionState(DesiredExtensionState* target_state)
 
   // stick
   {
-    const ControllerEmu::AnalogStick::StateData stick_state = m_stick->GetState();
+    const ControllerEmu::AnalogStick::StateData stick_state =
+        m_stick->GetState(m_input_override_function);
 
     tt_data.sx = static_cast<u8>((stick_state.x * STICK_RADIUS) + STICK_CENTER);
     tt_data.sy = static_cast<u8>((stick_state.y * STICK_RADIUS) + STICK_CENTER);
@@ -94,7 +95,7 @@ void Turntable::BuildDesiredExtensionState(DesiredExtensionState* target_state)
 
   // left table
   {
-    const ControllerEmu::Slider::StateData lt = m_left_table->GetState();
+    const ControllerEmu::Slider::StateData lt = m_left_table->GetState(m_input_override_function);
     const s8 tt = static_cast<s8>(lt.value * TABLE_RANGE);
 
     tt_data.ltable1 = tt;
@@ -103,7 +104,7 @@ void Turntable::BuildDesiredExtensionState(DesiredExtensionState* target_state)
 
   // right table
   {
-    const ControllerEmu::Slider::StateData rt = m_right_table->GetState();
+    const ControllerEmu::Slider::StateData rt = m_right_table->GetState(m_input_override_function);
     const s8 tt = static_cast<s8>(rt.value * TABLE_RANGE);
 
     tt_data.rtable1 = tt;
@@ -114,7 +115,7 @@ void Turntable::BuildDesiredExtensionState(DesiredExtensionState* target_state)
 
   // effect dial
   {
-    const auto dial_state = m_effect_dial->GetState();
+    const auto dial_state = m_effect_dial->GetState(m_input_override_function);
     const u8 dial = static_cast<u8>(dial_state.value * EFFECT_DIAL_RANGE) + EFFECT_DIAL_CENTER;
 
     tt_data.dial1 = dial;
@@ -123,13 +124,13 @@ void Turntable::BuildDesiredExtensionState(DesiredExtensionState* target_state)
 
   // crossfade slider
   {
-    const ControllerEmu::Slider::StateData cfs = m_crossfade->GetState();
+    const ControllerEmu::Slider::StateData cfs = m_crossfade->GetState(m_input_override_function);
 
     tt_data.slider = static_cast<u8>((cfs.value * CROSSFADE_RANGE) + CROSSFADE_CENTER);
   }
 
   // buttons
-  m_buttons->GetState(&tt_data.bt, turntable_button_bitmasks.data());
+  m_buttons->GetState(&tt_data.bt, turntable_button_bitmasks.data(), m_input_override_function);
 
   // flip button bits :/
   tt_data.bt ^= (BUTTON_L_GREEN | BUTTON_L_RED | BUTTON_L_BLUE | BUTTON_R_GREEN | BUTTON_R_RED |
diff --git a/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp b/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp
index 4aa11b3e70..b89dbfcdec 100644
--- a/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp
@@ -5,6 +5,7 @@
 
 #include <algorithm>
 #include <memory>
+#include <optional>
 #include <string_view>
 
 #include <fmt/format.h>
@@ -458,9 +459,10 @@ void Wiimote::BuildDesiredWiimoteState(DesiredWiimoteState* target_state)
 
   // Fetch pressed buttons from user input.
   target_state->buttons.hex = 0;
-  m_buttons->GetState(&target_state->buttons.hex, button_bitmasks);
+  m_buttons->GetState(&target_state->buttons.hex, button_bitmasks, m_input_override_function);
   m_dpad->GetState(&target_state->buttons.hex,
-                   IsSideways() ? dpad_sideways_bitmasks : dpad_bitmasks);
+                   IsSideways() ? dpad_sideways_bitmasks : dpad_bitmasks,
+                   m_input_override_function);
 
   // Calculate accelerometer state.
   // Calibration values are 8-bit but we want 10-bit precision, so << 2.
@@ -628,9 +630,6 @@ void Wiimote::SendDataReport(const DesiredWiimoteState& target_state)
         std::fill_n(ext_data, ext_size, u8(0xff));
       }
     }
-
-    Movie::CallWiiInputManip(rpt_builder, m_bt_device_index, m_active_extension,
-                             GetExtensionEncryptionKey());
   }
 
   Movie::CheckWiimoteStatus(m_bt_device_index, rpt_builder, m_active_extension,
@@ -651,8 +650,9 @@ ButtonData Wiimote::GetCurrentlyPressedButtons()
   const auto lock = GetStateLock();
 
   ButtonData buttons{};
-  m_buttons->GetState(&buttons.hex, button_bitmasks);
-  m_dpad->GetState(&buttons.hex, IsSideways() ? dpad_sideways_bitmasks : dpad_bitmasks);
+  m_buttons->GetState(&buttons.hex, button_bitmasks, m_input_override_function);
+  m_dpad->GetState(&buttons.hex, IsSideways() ? dpad_sideways_bitmasks : dpad_bitmasks,
+                   m_input_override_function);
 
   return buttons;
 }
@@ -789,7 +789,7 @@ void Wiimote::StepDynamics()
 {
   EmulateSwing(&m_swing_state, m_swing, 1.f / ::Wiimote::UPDATE_FREQ);
   EmulateTilt(&m_tilt_state, m_tilt, 1.f / ::Wiimote::UPDATE_FREQ);
-  EmulatePoint(&m_point_state, m_ir, 1.f / ::Wiimote::UPDATE_FREQ);
+  EmulatePoint(&m_point_state, m_ir, m_input_override_function, 1.f / ::Wiimote::UPDATE_FREQ);
   EmulateShake(&m_shake_state, m_shake, 1.f / ::Wiimote::UPDATE_FREQ);
   EmulateIMUCursor(&m_imu_cursor_state, m_imu_ir, m_imu_accelerometer, m_imu_gyroscope,
                    1.f / ::Wiimote::UPDATE_FREQ);
@@ -831,20 +831,87 @@ Common::Quaternion Wiimote::GetOrientation() const
          Common::Quaternion::RotateX(float(MathUtil::TAU / 4 * IsUpright()));
 }
 
+std::optional<Common::Vec3> Wiimote::OverrideVec3(const ControllerEmu::ControlGroup* control_group,
+                                                  std::optional<Common::Vec3> optional_vec) const
+{
+  bool has_value = optional_vec.has_value();
+  Common::Vec3 vec = has_value ? *optional_vec : Common::Vec3{};
+
+  if (m_input_override_function)
+  {
+    if (const std::optional<ControlState> x_override = m_input_override_function(
+            control_group->name, ControllerEmu::ReshapableInput::X_INPUT_OVERRIDE, vec.x))
+    {
+      has_value = true;
+      vec.x = *x_override;
+    }
+
+    if (const std::optional<ControlState> y_override = m_input_override_function(
+            control_group->name, ControllerEmu::ReshapableInput::Y_INPUT_OVERRIDE, vec.y))
+    {
+      has_value = true;
+      vec.y = *y_override;
+    }
+
+    if (const std::optional<ControlState> z_override = m_input_override_function(
+            control_group->name, ControllerEmu::ReshapableInput::Z_INPUT_OVERRIDE, vec.z))
+    {
+      has_value = true;
+      vec.z = *z_override;
+    }
+  }
+
+  return has_value ? std::make_optional(vec) : std::nullopt;
+}
+
+Common::Vec3 Wiimote::OverrideVec3(const ControllerEmu::ControlGroup* control_group,
+                                   Common::Vec3 vec) const
+{
+  return OverrideVec3(control_group, vec, m_input_override_function);
+}
+
+Common::Vec3
+Wiimote::OverrideVec3(const ControllerEmu::ControlGroup* control_group, Common::Vec3 vec,
+                      const ControllerEmu::InputOverrideFunction& input_override_function)
+{
+  if (input_override_function)
+  {
+    if (const std::optional<ControlState> x_override = input_override_function(
+            control_group->name, ControllerEmu::ReshapableInput::X_INPUT_OVERRIDE, vec.x))
+    {
+      vec.x = *x_override;
+    }
+
+    if (const std::optional<ControlState> y_override = input_override_function(
+            control_group->name, ControllerEmu::ReshapableInput::Y_INPUT_OVERRIDE, vec.y))
+    {
+      vec.y = *y_override;
+    }
+
+    if (const std::optional<ControlState> z_override = input_override_function(
+            control_group->name, ControllerEmu::ReshapableInput::Z_INPUT_OVERRIDE, vec.z))
+    {
+      vec.z = *z_override;
+    }
+  }
+
+  return vec;
+}
+
 Common::Vec3 Wiimote::GetTotalAcceleration() const
 {
-  if (const auto accel = m_imu_accelerometer->GetState())
-    return GetAcceleration(*accel);
+  const Common::Vec3 default_accel = Common::Vec3(0, 0, float(GRAVITY_ACCELERATION));
+  const Common::Vec3 accel = m_imu_accelerometer->GetState().value_or(default_accel);
 
-  return GetAcceleration();
+  return OverrideVec3(m_imu_accelerometer, GetAcceleration(accel));
 }
 
 Common::Vec3 Wiimote::GetTotalAngularVelocity() const
 {
-  if (const auto ang_vel = m_imu_gyroscope->GetState())
-    return GetAngularVelocity(*ang_vel);
+  const Common::Vec3 default_ang_vel = {};
+  const Common::Vec3 ang_vel = m_imu_gyroscope->GetState().value_or(default_ang_vel);
 
-  return GetAngularVelocity();
+  return OverrideVec3(m_imu_gyroscope, GetAngularVelocity(ang_vel));
 }
 
 Common::Matrix44 Wiimote::GetTotalTransformation() const
diff --git a/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h b/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h
index c360f33ab7..ce9b35ae2d 100644
--- a/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h
+++ b/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h
@@ -5,6 +5,7 @@
 
 #include <array>
 #include <numeric>
+#include <optional>
 #include <string>
 
 #include "Core/HW/WiimoteCommon/WiimoteReport.h"
@@ -146,6 +147,10 @@ public:
   // Active extension number is exposed for TAS.
   ExtensionNumber GetActiveExtensionNumber() const;
 
+  static Common::Vec3
+  OverrideVec3(const ControllerEmu::ControlGroup* control_group, Common::Vec3 vec,
+               const ControllerEmu::InputOverrideFunction& input_override_function);
+
 private:
   // Used only for error generation:
   static constexpr u8 EEPROM_I2C_ADDR = 0x50;
@@ -161,11 +166,10 @@ private:
   void BuildDesiredWiimoteState(DesiredWiimoteState* target_state);
 
   // Returns simulated accelerometer data in m/s^2.
-  Common::Vec3 GetAcceleration(
-      Common::Vec3 extra_acceleration = Common::Vec3(0, 0, float(GRAVITY_ACCELERATION))) const;
+  Common::Vec3 GetAcceleration(Common::Vec3 extra_acceleration) const;
 
   // Returns simulated gyroscope data in radians/s.
-  Common::Vec3 GetAngularVelocity(Common::Vec3 extra_angular_velocity = {}) const;
+  Common::Vec3 GetAngularVelocity(Common::Vec3 extra_angular_velocity) const;
 
   // Returns the transformation of the world around the wiimote.
   // Used for simulating camera data and for rotating acceleration data.
@@ -176,6 +180,10 @@ private:
   // Returns the world rotation from the effects of sideways/upright settings.
   Common::Quaternion GetOrientation() const;
 
+  std::optional<Common::Vec3> OverrideVec3(const ControllerEmu::ControlGroup* control_group,
+                                           std::optional<Common::Vec3> optional_vec) const;
+  Common::Vec3 OverrideVec3(const ControllerEmu::ControlGroup* control_group,
+                            Common::Vec3 vec) const;
   Common::Vec3 GetTotalAcceleration() const;
   Common::Vec3 GetTotalAngularVelocity() const;
   Common::Matrix44 GetTotalTransformation() const;
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.cpp b/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.cpp
index 539e02b449..0f30b50f63 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.cpp
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.cpp
@@ -4,6 +4,7 @@
 #include "InputCommon/ControllerEmu/ControlGroup/AnalogStick.h"
 
 #include <cmath>
+#include <optional>
 
 #include "Common/Common.h"
 #include "Common/MathUtil.h"
@@ -48,6 +49,34 @@ AnalogStick::StateData AnalogStick::GetState() const
   return GetReshapableState(true);
 }
 
+AnalogStick::StateData AnalogStick::GetState(const InputOverrideFunction& override_func) const
+{
+  bool override_occurred = false;
+  return GetState(override_func, &override_occurred);
+}
+
+AnalogStick::StateData AnalogStick::GetState(const InputOverrideFunction& override_func,
+                                             bool* override_occurred) const
+{
+  StateData state = GetState();
+  if (!override_func)
+    return state;
+
+  if (const std::optional<ControlState> x_override = override_func(name, X_INPUT_OVERRIDE, state.x))
+  {
+    state.x = *x_override;
+    *override_occurred = true;
+  }
+
+  if (const std::optional<ControlState> y_override = override_func(name, Y_INPUT_OVERRIDE, state.y))
+  {
+    state.y = *y_override;
+    *override_occurred = true;
+  }
+
+  return state;
+}
+
 ControlState AnalogStick::GetGateRadiusAtAngle(double ang) const
 {
   return m_stick_gate->GetRadiusAtAngle(ang);
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.h b/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.h
index 47e3ad5743..377e63251d 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.h
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/AnalogStick.h
@@ -21,6 +21,8 @@ public:
   ControlState GetGateRadiusAtAngle(double ang) const override;
 
   StateData GetState() const;
+  StateData GetState(const InputOverrideFunction& override_func) const;
+  StateData GetState(const InputOverrideFunction& override_func, bool* override_occurred) const;
 
 private:
   Control* GetModifierInput() const override;
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Buttons.h b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Buttons.h
index 2d02adabf1..652f64ae5f 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Buttons.h
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Buttons.h
@@ -3,6 +3,7 @@
 
 #pragma once
 
+#include <cmath>
 #include <string>
 
 #include "InputCommon/ControlReference/ControlReference.h"
@@ -24,5 +25,21 @@ public:
     for (auto& control : controls)
       *buttons |= *(bitmasks++) * control->GetState<bool>();
   }
+
+  template <typename C>
+  void GetState(C* const buttons, const C* bitmasks,
+                const InputOverrideFunction& override_func) const
+  {
+    if (!override_func)
+      return GetState(buttons, bitmasks);
+
+    for (auto& control : controls)
+    {
+      ControlState state = control->GetState();
+      if (std::optional<ControlState> state_override = override_func(name, control->name, state))
+        state = *state_override;
+      *buttons |= *(bitmasks++) * (std::lround(state) > 0);
+    }
+  }
 };
 }  // namespace ControllerEmu
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/ControlGroup.h b/Source/Core/InputCommon/ControllerEmu/ControlGroup/ControlGroup.h
index c08c072aba..fb10bab074 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/ControlGroup.h
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/ControlGroup.h
@@ -5,14 +5,18 @@
 
 #include <algorithm>
 #include <cmath>
+#include <functional>
 #include <memory>
+#include <optional>
 #include <string>
+#include <string_view>
 #include <type_traits>
 #include <vector>
 
 #include "Common/CommonTypes.h"
 #include "Common/IniFile.h"
 #include "InputCommon/ControllerEmu/Control/Control.h"
+#include "InputCommon/ControllerInterface/CoreDevice.h"
 
 namespace ControllerEmu
 {
@@ -27,6 +31,9 @@ class NumericSetting;
 template <typename T>
 class SettingValue;
 
+using InputOverrideFunction = std::function<std::optional<ControlState>(
+    const std::string_view group_name, const std::string_view control_name, ControlState state)>;
+
 enum class GroupType
 {
   Other,
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Cursor.cpp b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Cursor.cpp
index 043ef37356..7359a4e66d 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Cursor.cpp
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Cursor.cpp
@@ -82,15 +82,28 @@ ControlState Cursor::GetGateRadiusAtAngle(double ang) const
 
 Cursor::StateData Cursor::GetState(const bool adjusted)
 {
-  if (!adjusted)
-  {
-    const auto raw_input = GetReshapableState(false);
+  const ReshapeData input = GetReshapableState(adjusted);
+  const StateData state = adjusted ? UpdateState(input) : StateData{input.x, input.y};
+  return state;
+}
 
-    return {raw_input.x, raw_input.y};
-  }
+Cursor::StateData Cursor::GetState(const bool adjusted,
+                                   const ControllerEmu::InputOverrideFunction& override_func)
+{
+  StateData state = GetState(adjusted);
+  if (!override_func)
+    return state;
 
-  const auto input = GetReshapableState(true);
+  if (const std::optional<ControlState> x_override = override_func(name, X_INPUT_OVERRIDE, state.x))
+    state.x = *x_override;
+  if (const std::optional<ControlState> y_override = override_func(name, Y_INPUT_OVERRIDE, state.y))
+    state.y = *y_override;
 
+  return state;
+}
+
+Cursor::StateData Cursor::UpdateState(Cursor::ReshapeData input)
+{
   // TODO: Using system time is ugly.
   // Kill this after state is moved into wiimote rather than this class.
   const auto now = Clock::now();
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Cursor.h b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Cursor.h
index 5e64ce86dc..3710a40d92 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Cursor.h
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Cursor.h
@@ -29,6 +29,7 @@ public:
 
   // Modifies the state
   StateData GetState(bool adjusted);
+  StateData GetState(bool adjusted, const ControllerEmu::InputOverrideFunction& override_func);
 
   // Yaw movement in radians.
   ControlState GetTotalYaw() const;
@@ -40,6 +41,8 @@ public:
   ControlState GetVerticalOffset() const;
 
 private:
+  Cursor::StateData UpdateState(Cursor::ReshapeData input);
+
   // This is used to reduce the cursor speed for relative input
   // to something that makes sense with the default range.
   static constexpr double STEP_PER_SEC = 0.01 * 200;
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/MixedTriggers.cpp b/Source/Core/InputCommon/ControllerEmu/ControlGroup/MixedTriggers.cpp
index 8c2f4cbac5..8783087650 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/MixedTriggers.cpp
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/MixedTriggers.cpp
@@ -4,6 +4,7 @@
 #include "InputCommon/ControllerEmu/ControlGroup/MixedTriggers.h"
 
 #include <algorithm>
+#include <cmath>
 #include <cstddef>
 #include <memory>
 #include <string>
@@ -63,6 +64,53 @@ void MixedTriggers::GetState(u16* const digital, const u16* bitmasks, ControlSta
   }
 }
 
+void MixedTriggers::GetState(u16* digital, const u16* bitmasks, ControlState* analog,
+                             const InputOverrideFunction& override_func, bool adjusted) const
+{
+  if (!override_func)
+    return GetState(digital, bitmasks, analog, adjusted);
+
+  const ControlState threshold = GetThreshold();
+  ControlState deadzone = GetDeadzone();
+
+  // Return raw values. (used in UI)
+  if (!adjusted)
+  {
+    deadzone = 0.0;
+  }
+
+  const int trigger_count = int(controls.size() / 2);
+  for (int i = 0; i != trigger_count; ++i)
+  {
+    bool button_bool = false;
+    const ControlState button_value = ApplyDeadzone(controls[i]->GetState(), deadzone);
+    ControlState analog_value = ApplyDeadzone(controls[trigger_count + i]->GetState(), deadzone);
+
+    // Apply threshold:
+    if (button_value > threshold)
+    {
+      analog_value = 1.0;
+      button_bool = true;
+    }
+
+    if (const std::optional<ControlState> button_override =
+            override_func(name, controls[i]->name, static_cast<ControlState>(button_bool)))
+    {
+      button_bool = std::lround(*button_override) > 0;
+    }
+
+    if (const std::optional<ControlState> analog_override =
+            override_func(name, controls[trigger_count + i]->name, analog_value))
+    {
+      analog_value = *analog_override;
+    }
+
+    if (button_bool)
+      *digital |= bitmasks[i];
+    analog[i] = std::min(analog_value, 1.0);
+  }
+}
+
 ControlState MixedTriggers::GetDeadzone() const
 {
   return m_deadzone_setting.GetValue() / 100;
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/MixedTriggers.h b/Source/Core/InputCommon/ControllerEmu/ControlGroup/MixedTriggers.h
index fcd98b279e..2e1014d047 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/MixedTriggers.h
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/MixedTriggers.h
@@ -17,6 +17,8 @@ public:
 
   void GetState(u16* digital, const u16* bitmasks, ControlState* analog,
                 bool adjusted = true) const;
+  void GetState(u16* digital, const u16* bitmasks, ControlState* analog,
+                const InputOverrideFunction& override_func, bool adjusted = true) const;
 
   ControlState GetDeadzone() const;
   ControlState GetThreshold() const;
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Slider.cpp b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Slider.cpp
index f0516a567f..708831a4c3 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Slider.cpp
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Slider.cpp
@@ -35,4 +35,21 @@ Slider::StateData Slider::GetState() const
 
   return {std::clamp(ApplyDeadzone(state, deadzone), -1.0, 1.0)};
 }
+
+Slider::StateData Slider::GetState(const InputOverrideFunction& override_func) const
+{
+  if (!override_func)
+    return GetState();
+
+  const ControlState deadzone = m_deadzone_setting.GetValue() / 100;
+  ControlState state = controls[1]->GetState() - controls[0]->GetState();
+
+  state = ApplyDeadzone(state, deadzone);
+
+  if (std::optional<ControlState> state_override = override_func(name, X_INPUT_OVERRIDE, state))
+    state = *state_override;
+
+  return {std::clamp(state, -1.0, 1.0)};
+}
+
 }  // namespace ControllerEmu
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Slider.h b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Slider.h
index 9d1bf697a5..0e635da235 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Slider.h
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Slider.h
@@ -23,6 +23,9 @@ public:
   explicit Slider(const std::string& name_);
 
   StateData GetState() const;
+  StateData GetState(const InputOverrideFunction& override_func) const;
+
+  static constexpr const char* X_INPUT_OVERRIDE = "X";
 
 private:
   SettingValue<double> m_deadzone_setting;
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Triggers.cpp b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Triggers.cpp
index 17e64d2a8b..321c9272d0 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Triggers.cpp
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Triggers.cpp
@@ -6,6 +6,7 @@
 #include <algorithm>
 #include <cstddef>
 #include <memory>
+#include <optional>
 #include <string>
 
 #include "Common/Common.h"
@@ -31,4 +32,25 @@ Triggers::StateData Triggers::GetState() const
 
   return result;
 }
+
+Triggers::StateData Triggers::GetState(const InputOverrideFunction& override_func) const
+{
+  if (!override_func)
+    return GetState();
+
+  const size_t trigger_count = controls.size();
+  const ControlState deadzone = m_deadzone_setting.GetValue() / 100;
+
+  StateData result(trigger_count);
+  for (size_t i = 0; i < trigger_count; ++i)
+  {
+    ControlState state = ApplyDeadzone(controls[i]->GetState(), deadzone);
+    if (std::optional<ControlState> state_override = override_func(name, controls[i]->name, state))
+      state = *state_override;
+    result.data[i] = std::min(state, 1.0);
+  }
+
+  return result;
+}
+
 }  // namespace ControllerEmu
diff --git a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Triggers.h b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Triggers.h
index 2ea02bedb5..c73dee9cfa 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControlGroup/Triggers.h
+++ b/Source/Core/InputCommon/ControllerEmu/ControlGroup/Triggers.h
@@ -26,6 +26,7 @@ public:
   explicit Triggers(const std::string& name);
 
   StateData GetState() const;
+  StateData GetState(const InputOverrideFunction& override_func) const;
 
 private:
   SettingValue<double> m_deadzone_setting;
diff --git a/Source/Core/InputCommon/ControllerEmu/ControllerEmu.cpp b/Source/Core/InputCommon/ControllerEmu/ControllerEmu.cpp
index 0a3de3e391..dc9830de3f 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControllerEmu.cpp
+++ b/Source/Core/InputCommon/ControllerEmu/ControllerEmu.cpp
@@ -6,6 +6,7 @@
 #include <memory>
 #include <mutex>
 #include <string>
+#include <utility>
 
 #include "Common/IniFile.h"
 
@@ -176,4 +177,15 @@ void EmulatedController::LoadDefaults(const ControllerInterface& ciface)
     SetDefaultDevice(default_device_string);
   }
 }
+
+void EmulatedController::SetInputOverrideFunction(InputOverrideFunction override_func)
+{
+  m_input_override_function = std::move(override_func);
+}
+
+void EmulatedController::ClearInputOverrideFunction()
+{
+  m_input_override_function = {};
+}
+
 }  // namespace ControllerEmu
diff --git a/Source/Core/InputCommon/ControllerEmu/ControllerEmu.h b/Source/Core/InputCommon/ControllerEmu/ControllerEmu.h
index 2db991eb82..b0e514d20a 100644
--- a/Source/Core/InputCommon/ControllerEmu/ControllerEmu.h
+++ b/Source/Core/InputCommon/ControllerEmu/ControllerEmu.h
@@ -15,6 +15,7 @@
 #include "Common/IniFile.h"
 #include "Common/MathUtil.h"
 #include "InputCommon/ControlReference/ExpressionParser.h"
+#include "InputCommon/ControllerEmu/ControlGroup/ControlGroup.h"
 #include "InputCommon/ControllerInterface/CoreDevice.h"
 
 class ControllerInterface;
@@ -184,6 +185,9 @@ public:
   void SetDefaultDevice(const std::string& device);
   void SetDefaultDevice(ciface::Core::DeviceQualifier devq);
 
+  void SetInputOverrideFunction(InputOverrideFunction override_func);
+  void ClearInputOverrideFunction();
+
   void UpdateReferences(const ControllerInterface& devi);
   void UpdateSingleControlReference(const ControllerInterface& devi, ControlReference* ref);
 
@@ -228,6 +232,8 @@ protected:
   // so theirs won't be used (and thus shouldn't even exist).
   ciface::ExpressionParser::ControlEnvironment::VariableContainer m_expression_vars;
 
+  InputOverrideFunction m_input_override_function;
+
   void UpdateReferences(ciface::ExpressionParser::ControlEnvironment& env);
 
 private:
diff --git a/Source/Core/InputCommon/ControllerEmu/StickGate.h b/Source/Core/InputCommon/ControllerEmu/StickGate.h
index 528aa4a5c8..831762fda3 100644
--- a/Source/Core/InputCommon/ControllerEmu/StickGate.h
+++ b/Source/Core/InputCommon/ControllerEmu/StickGate.h
@@ -106,6 +106,10 @@ public:
   const ReshapeData& GetCenter() const;
   void SetCenter(ReshapeData center);
 
+  static constexpr const char* X_INPUT_OVERRIDE = "X";
+  static constexpr const char* Y_INPUT_OVERRIDE = "Y";
+  static constexpr const char* Z_INPUT_OVERRIDE = "Z";
+
 protected:
   ReshapeData Reshape(ControlState x, ControlState y, ControlState modifier = 0.0,
                       ControlState clamp = 1.0) const;