16 files changed, 237 insertions, 191 deletions

diff --git a/src/input_common/CMakeLists.txt b/src/input_common/CMakeLists.txt
index c84685214..7b39a38c1 100644
--- a/src/input_common/CMakeLists.txt
+++ b/src/input_common/CMakeLists.txt
@@ -29,6 +29,35 @@ add_library(input_common STATIC
     udp/udp.h
 )
 
+if (MSVC)
+    target_compile_options(input_common PRIVATE
+        # 'expression' : signed/unsigned mismatch
+        /we4018
+        # 'argument' : conversion from 'type1' to 'type2', possible loss of data (floating-point)
+        /we4244
+        # 'conversion' : conversion from 'type1' to 'type2', signed/unsigned mismatch
+        /we4245
+        # 'operator': conversion from 'type1:field_bits' to 'type2:field_bits', possible loss of data
+        /we4254
+        # 'var' : conversion from 'size_t' to 'type', possible loss of data
+        /we4267
+        # 'context' : truncation from 'type1' to 'type2'
+        /we4305
+    )
+else()
+    target_compile_options(input_common PRIVATE
+        -Werror=conversion
+        -Werror=ignored-qualifiers
+        -Werror=implicit-fallthrough
+        -Werror=reorder
+        -Werror=shadow
+        -Werror=sign-compare
+        -Werror=unused-but-set-parameter
+        -Werror=unused-but-set-variable
+        -Werror=unused-variable
+    )
+endif()
+
 if(SDL2_FOUND)
     target_sources(input_common PRIVATE
         sdl/sdl_impl.cpp
diff --git a/src/input_common/analog_from_button.cpp b/src/input_common/analog_from_button.cpp
index 6cabdaa3c..74744d7f3 100755
--- a/src/input_common/analog_from_button.cpp
+++ b/src/input_common/analog_from_button.cpp
@@ -20,18 +20,22 @@ public:
         constexpr float SQRT_HALF = 0.707106781f;
         int x = 0, y = 0;
 
-        if (right->GetStatus())
+        if (right->GetStatus()) {
             ++x;
-        if (left->GetStatus())
+        }
+        if (left->GetStatus()) {
             --x;
-        if (up->GetStatus())
+        }
+        if (up->GetStatus()) {
             ++y;
-        if (down->GetStatus())
+        }
+        if (down->GetStatus()) {
             --y;
+        }
 
-        float coef = modifier->GetStatus() ? modifier_scale : 1.0f;
-        return std::make_tuple(x * coef * (y == 0 ? 1.0f : SQRT_HALF),
-                               y * coef * (x == 0 ? 1.0f : SQRT_HALF));
+        const float coef = modifier->GetStatus() ? modifier_scale : 1.0f;
+        return std::make_tuple(static_cast<float>(x) * coef * (y == 0 ? 1.0f : SQRT_HALF),
+                               static_cast<float>(y) * coef * (x == 0 ? 1.0f : SQRT_HALF));
     }
 
     bool GetAnalogDirectionStatus(Input::AnalogDirection direction) const override {
diff --git a/src/input_common/gcadapter/gc_adapter.cpp b/src/input_common/gcadapter/gc_adapter.cpp
index 89c148aba..c95feb0d7 100644
--- a/src/input_common/gcadapter/gc_adapter.cpp
+++ b/src/input_common/gcadapter/gc_adapter.cpp
@@ -21,7 +21,7 @@
 
 namespace GCAdapter {
 
-/// Used to loop through and assign button in poller
+// Used to loop through and assign button in poller
 constexpr std::array<PadButton, 12> PadButtonArray{
     PadButton::PAD_BUTTON_LEFT, PadButton::PAD_BUTTON_RIGHT, PadButton::PAD_BUTTON_DOWN,
     PadButton::PAD_BUTTON_UP,   PadButton::PAD_TRIGGER_Z,    PadButton::PAD_TRIGGER_R,
@@ -29,6 +29,18 @@ constexpr std::array<PadButton, 12> PadButtonArray{
     PadButton::PAD_BUTTON_X,    PadButton::PAD_BUTTON_Y,     PadButton::PAD_BUTTON_START,
 };
 
+static void PadToState(const GCPadStatus& pad, GCState& out_state) {
+    for (const auto& button : PadButtonArray) {
+        const auto button_key = static_cast<u16>(button);
+        const auto button_value = (pad.button & button_key) != 0;
+        out_state.buttons.insert_or_assign(static_cast<s32>(button_key), button_value);
+    }
+
+    for (std::size_t i = 0; i < pad.axis_values.size(); ++i) {
+        out_state.axes.insert_or_assign(static_cast<u32>(i), pad.axis_values[i]);
+    }
+}
+
 Adapter::Adapter() {
     if (usb_adapter_handle != nullptr) {
         return;
@@ -78,17 +90,17 @@ GCPadStatus Adapter::GetPadStatus(std::size_t port, const std::array<u8, 37>& ad
 
         for (std::size_t i = 0; i < b1_buttons.size(); ++i) {
             if ((b1 & (1U << i)) != 0) {
-                pad.button |= static_cast<u16>(b1_buttons[i]);
+                pad.button = static_cast<u16>(pad.button | static_cast<u16>(b1_buttons[i]));
             }
         }
 
         for (std::size_t j = 0; j < b2_buttons.size(); ++j) {
             if ((b2 & (1U << j)) != 0) {
-                pad.button |= static_cast<u16>(b2_buttons[j]);
+                pad.button = static_cast<u16>(pad.button | static_cast<u16>(b2_buttons[j]));
             }
         }
         for (PadAxes axis : axes) {
-            const std::size_t index = static_cast<std::size_t>(axis);
+            const auto index = static_cast<std::size_t>(axis);
             pad.axis_values[index] = adapter_payload[offset + 3 + index];
         }
 
@@ -100,17 +112,6 @@ GCPadStatus Adapter::GetPadStatus(std::size_t port, const std::array<u8, 37>& ad
     return pad;
 }
 
-void Adapter::PadToState(const GCPadStatus& pad, GCState& state) {
-    for (const auto& button : PadButtonArray) {
-        const u16 button_value = static_cast<u16>(button);
-        state.buttons.insert_or_assign(button_value, pad.button & button_value);
-    }
-
-    for (size_t i = 0; i < pad.axis_values.size(); ++i) {
-        state.axes.insert_or_assign(static_cast<u8>(i), pad.axis_values[i]);
-    }
-}
-
 void Adapter::Read() {
     LOG_DEBUG(Input, "GC Adapter Read() thread started");
 
@@ -250,7 +251,7 @@ void Adapter::GetGCEndpoint(libusb_device* device) {
             const libusb_interface_descriptor* interface = &interfaceContainer->altsetting[i];
             for (u8 e = 0; e < interface->bNumEndpoints; e++) {
                 const libusb_endpoint_descriptor* endpoint = &interface->endpoint[e];
-                if (endpoint->bEndpointAddress & LIBUSB_ENDPOINT_IN) {
+                if ((endpoint->bEndpointAddress & LIBUSB_ENDPOINT_IN) != 0) {
                     input_endpoint = endpoint->bEndpointAddress;
                 } else {
                     output_endpoint = endpoint->bEndpointAddress;
@@ -419,7 +420,7 @@ const std::array<GCState, 4>& Adapter::GetPadState() const {
     return state;
 }
 
-int Adapter::GetOriginValue(int port, int axis) const {
+int Adapter::GetOriginValue(u32 port, u32 axis) const {
     return origin_status[port].axis_values[axis];
 }
 
diff --git a/src/input_common/gcadapter/gc_adapter.h b/src/input_common/gcadapter/gc_adapter.h
index 75bf9fe74..4f5f3de8e 100644
--- a/src/input_common/gcadapter/gc_adapter.h
+++ b/src/input_common/gcadapter/gc_adapter.h
@@ -60,7 +60,7 @@ struct GCPadStatus {
 
 struct GCState {
     std::unordered_map<int, bool> buttons;
-    std::unordered_map<int, u16> axes;
+    std::unordered_map<u32, u16> axes;
 };
 
 enum class ControllerTypes { None, Wired, Wireless };
@@ -89,13 +89,11 @@ public:
     std::array<GCState, 4>& GetPadState();
     const std::array<GCState, 4>& GetPadState() const;
 
-    int GetOriginValue(int port, int axis) const;
+    int GetOriginValue(u32 port, u32 axis) const;
 
 private:
     GCPadStatus GetPadStatus(std::size_t port, const std::array<u8, 37>& adapter_payload);
 
-    void PadToState(const GCPadStatus& pad, GCState& state);
-
     void Read();
 
     /// Resets status of device connected to port
diff --git a/src/input_common/gcadapter/gc_poller.cpp b/src/input_common/gcadapter/gc_poller.cpp
index 92e9e8e89..893556916 100644
--- a/src/input_common/gcadapter/gc_poller.cpp
+++ b/src/input_common/gcadapter/gc_poller.cpp
@@ -15,7 +15,7 @@ namespace InputCommon {
 
 class GCButton final : public Input::ButtonDevice {
 public:
-    explicit GCButton(int port_, int button_, const GCAdapter::Adapter* adapter)
+    explicit GCButton(u32 port_, int button_, const GCAdapter::Adapter* adapter)
         : port(port_), button(button_), gcadapter(adapter) {}
 
     ~GCButton() override;
@@ -28,14 +28,14 @@ public:
     }
 
 private:
-    const int port;
+    const u32 port;
     const int button;
     const GCAdapter::Adapter* gcadapter;
 };
 
 class GCAxisButton final : public Input::ButtonDevice {
 public:
-    explicit GCAxisButton(int port_, int axis_, float threshold_, bool trigger_if_greater_,
+    explicit GCAxisButton(u32 port_, u32 axis_, float threshold_, bool trigger_if_greater_,
                           const GCAdapter::Adapter* adapter)
         : port(port_), axis(axis_), threshold(threshold_), trigger_if_greater(trigger_if_greater_),
           gcadapter(adapter),
@@ -56,8 +56,8 @@ public:
     }
 
 private:
-    const int port;
-    const int axis;
+    const u32 port;
+    const u32 axis;
     float threshold;
     bool trigger_if_greater;
     const GCAdapter::Adapter* gcadapter;
@@ -70,8 +70,8 @@ GCButtonFactory::GCButtonFactory(std::shared_ptr<GCAdapter::Adapter> adapter_)
 GCButton::~GCButton() = default;
 
 std::unique_ptr<Input::ButtonDevice> GCButtonFactory::Create(const Common::ParamPackage& params) {
-    const int button_id = params.Get("button", 0);
-    const int port = params.Get("port", 0);
+    const auto button_id = params.Get("button", 0);
+    const auto port = static_cast<u32>(params.Get("port", 0));
 
     constexpr int PAD_STICK_ID = static_cast<u16>(GCAdapter::PadButton::PAD_STICK);
 
@@ -149,25 +149,27 @@ void GCButtonFactory::EndConfiguration() {
 
 class GCAnalog final : public Input::AnalogDevice {
 public:
-    GCAnalog(int port_, int axis_x_, int axis_y_, float deadzone_,
-             const GCAdapter::Adapter* adapter, float range_)
+    explicit GCAnalog(u32 port_, u32 axis_x_, u32 axis_y_, float deadzone_,
+                      const GCAdapter::Adapter* adapter, float range_)
         : port(port_), axis_x(axis_x_), axis_y(axis_y_), deadzone(deadzone_), gcadapter(adapter),
           origin_value_x(static_cast<float>(adapter->GetOriginValue(port_, axis_x_))),
           origin_value_y(static_cast<float>(adapter->GetOriginValue(port_, axis_y_))),
           range(range_) {}
 
-    float GetAxis(int axis) const {
+    float GetAxis(u32 axis) const {
         if (gcadapter->DeviceConnected(port)) {
             std::lock_guard lock{mutex};
             const auto origin_value = axis % 2 == 0 ? origin_value_x : origin_value_y;
-            return (gcadapter->GetPadState()[port].axes.at(axis) - origin_value) / (100.0f * range);
+            const auto axis_value =
+                static_cast<float>(gcadapter->GetPadState()[port].axes.at(axis));
+            return (axis_value - origin_value) / (100.0f * range);
         }
         return 0.0f;
     }
 
-    std::pair<float, float> GetAnalog(int axis_x, int axis_y) const {
-        float x = GetAxis(axis_x);
-        float y = GetAxis(axis_y);
+    std::pair<float, float> GetAnalog(u32 analog_axis_x, u32 analog_axis_y) const {
+        float x = GetAxis(analog_axis_x);
+        float y = GetAxis(analog_axis_y);
 
         // Make sure the coordinates are in the unit circle,
         // otherwise normalize it.
@@ -208,9 +210,9 @@ public:
     }
 
 private:
-    const int port;
-    const int axis_x;
-    const int axis_y;
+    const u32 port;
+    const u32 axis_x;
+    const u32 axis_y;
     const float deadzone;
     const GCAdapter::Adapter* gcadapter;
     const float origin_value_x;
@@ -231,11 +233,11 @@ GCAnalogFactory::GCAnalogFactory(std::shared_ptr<GCAdapter::Adapter> adapter_)
  *     - "axis_y": the index of the axis to be bind as y-axis
  */
 std::unique_ptr<Input::AnalogDevice> GCAnalogFactory::Create(const Common::ParamPackage& params) {
-    const int port = params.Get("port", 0);
-    const int axis_x = params.Get("axis_x", 0);
-    const int axis_y = params.Get("axis_y", 1);
-    const float deadzone = std::clamp(params.Get("deadzone", 0.0f), 0.0f, 1.0f);
-    const float range = std::clamp(params.Get("range", 1.0f), 0.50f, 1.50f);
+    const auto port = static_cast<u32>(params.Get("port", 0));
+    const auto axis_x = static_cast<u32>(params.Get("axis_x", 0));
+    const auto axis_y = static_cast<u32>(params.Get("axis_y", 1));
+    const auto deadzone = std::clamp(params.Get("deadzone", 0.0f), 0.0f, 1.0f);
+    const auto range = std::clamp(params.Get("range", 1.0f), 0.50f, 1.50f);
 
     return std::make_unique<GCAnalog>(port, axis_x, axis_y, deadzone, adapter.get(), range);
 }
@@ -256,7 +258,7 @@ Common::ParamPackage GCAnalogFactory::GetNextInput() {
     for (std::size_t port = 0; port < queue.size(); ++port) {
         while (queue[port].Pop(pad)) {
             if (pad.axis == GCAdapter::PadAxes::Undefined ||
-                std::abs((pad.axis_value - 128.0f) / 128.0f) < 0.1) {
+                std::abs((static_cast<float>(pad.axis_value) - 128.0f) / 128.0f) < 0.1f) {
                 continue;
             }
             // An analog device needs two axes, so we need to store the axis for later and wait for
diff --git a/src/input_common/keyboard.cpp b/src/input_common/keyboard.cpp
index afb8e6612..24a6f7a33 100644
--- a/src/input_common/keyboard.cpp
+++ b/src/input_common/keyboard.cpp
@@ -49,8 +49,9 @@ public:
     void ChangeKeyStatus(int key_code, bool pressed) {
         std::lock_guard guard{mutex};
         for (const KeyButtonPair& pair : list) {
-            if (pair.key_code == key_code)
+            if (pair.key_code == key_code) {
                 pair.key_button->status.store(pressed);
+            }
         }
     }
 
@@ -73,7 +74,7 @@ KeyButton::~KeyButton() {
 }
 
 std::unique_ptr<Input::ButtonDevice> Keyboard::Create(const Common::ParamPackage& params) {
-    int key_code = params.Get("code", 0);
+    const int key_code = params.Get("code", 0);
     std::unique_ptr<KeyButton> button = std::make_unique<KeyButton>(key_button_list);
     key_button_list->AddKeyButton(key_code, button.get());
     return button;
diff --git a/src/input_common/main.cpp b/src/input_common/main.cpp
index 3d97d95f7..d32fd8b81 100644
--- a/src/input_common/main.cpp
+++ b/src/input_common/main.cpp
@@ -196,6 +196,10 @@ ButtonMapping InputSubsystem::GetButtonMappingForDevice(const Common::ParamPacka
     return impl->GetButtonMappingForDevice(device);
 }
 
+MotionMapping InputSubsystem::GetMotionMappingForDevice(const Common::ParamPackage& device) const {
+    return impl->GetMotionMappingForDevice(device);
+}
+
 GCAnalogFactory* InputSubsystem::GetGCAnalogs() {
     return impl->gcanalog.get();
 }
diff --git a/src/input_common/motion_emu.cpp b/src/input_common/motion_emu.cpp
index 69fd3c1d2..d4da5596b 100644
--- a/src/input_common/motion_emu.cpp
+++ b/src/input_common/motion_emu.cpp
@@ -18,11 +18,11 @@ namespace InputCommon {
 // Implementation class of the motion emulation device
 class MotionEmuDevice {
 public:
-    MotionEmuDevice(int update_millisecond, float sensitivity)
-        : update_millisecond(update_millisecond),
+    explicit MotionEmuDevice(int update_millisecond_, float sensitivity_)
+        : update_millisecond(update_millisecond_),
           update_duration(std::chrono::duration_cast<std::chrono::steady_clock::duration>(
               std::chrono::milliseconds(update_millisecond))),
-          sensitivity(sensitivity), motion_emu_thread(&MotionEmuDevice::MotionEmuThread, this) {}
+          sensitivity(sensitivity_), motion_emu_thread(&MotionEmuDevice::MotionEmuThread, this) {}
 
     ~MotionEmuDevice() {
         if (motion_emu_thread.joinable()) {
@@ -37,16 +37,18 @@ public:
     }
 
     void Tilt(int x, int y) {
-        auto mouse_move = Common::MakeVec(x, y) - mouse_origin;
-        if (is_tilting) {
-            std::lock_guard guard{tilt_mutex};
-            if (mouse_move.x == 0 && mouse_move.y == 0) {
-                tilt_angle = 0;
-            } else {
-                tilt_direction = mouse_move.Cast<float>();
-                tilt_angle =
-                    std::clamp(tilt_direction.Normalize() * sensitivity, 0.0f, Common::PI * 0.5f);
-            }
+        if (!is_tilting) {
+            return;
+        }
+
+        std::lock_guard guard{tilt_mutex};
+        const auto mouse_move = Common::MakeVec(x, y) - mouse_origin;
+        if (mouse_move.x == 0 && mouse_move.y == 0) {
+            tilt_angle = 0;
+        } else {
+            tilt_direction = mouse_move.Cast<float>();
+            tilt_angle =
+                std::clamp(tilt_direction.Normalize() * sensitivity, 0.0f, Common::PI * 0.5f);
         }
     }
 
@@ -86,11 +88,10 @@ private:
     void MotionEmuThread() {
         auto update_time = std::chrono::steady_clock::now();
         Common::Quaternion<float> q = Common::MakeQuaternion(Common::Vec3<float>(), 0);
-        Common::Quaternion<float> old_q;
 
         while (!shutdown_event.WaitUntil(update_time)) {
             update_time += update_duration;
-            old_q = q;
+            const Common::Quaternion<float> old_q = q;
 
             {
                 std::lock_guard guard{tilt_mutex};
@@ -100,14 +101,14 @@ private:
                     Common::MakeVec(-tilt_direction.y, 0.0f, tilt_direction.x), tilt_angle);
             }
 
-            auto inv_q = q.Inverse();
+            const auto inv_q = q.Inverse();
 
             // Set the gravity vector in world space
             auto gravity = Common::MakeVec(0.0f, -1.0f, 0.0f);
 
             // Find the angular rate vector in world space
             auto angular_rate = ((q - old_q) * inv_q).xyz * 2;
-            angular_rate *= 1000 / update_millisecond / Common::PI * 180;
+            angular_rate *= static_cast<float>(1000 / update_millisecond) / Common::PI * 180.0f;
 
             // Transform the two vectors from world space to 3DS space
             gravity = QuaternionRotate(inv_q, gravity);
@@ -136,7 +137,7 @@ private:
 // can forward all the inputs to the implementation only when it is valid.
 class MotionEmuDeviceWrapper : public Input::MotionDevice {
 public:
-    MotionEmuDeviceWrapper(int update_millisecond, float sensitivity) {
+    explicit MotionEmuDeviceWrapper(int update_millisecond, float sensitivity) {
         device = std::make_shared<MotionEmuDevice>(update_millisecond, sensitivity);
     }
 
@@ -148,8 +149,8 @@ public:
 };
 
 std::unique_ptr<Input::MotionDevice> MotionEmu::Create(const Common::ParamPackage& params) {
-    int update_period = params.Get("update_period", 100);
-    float sensitivity = params.Get("sensitivity", 0.01f);
+    const int update_period = params.Get("update_period", 100);
+    const float sensitivity = params.Get("sensitivity", 0.01f);
     auto device_wrapper = std::make_unique<MotionEmuDeviceWrapper>(update_period, sensitivity);
     // Previously created device is disconnected here. Having two motion devices for 3DS is not
     // expected.
diff --git a/src/input_common/motion_from_button.cpp b/src/input_common/motion_from_button.cpp
index 9d459f963..29045a673 100644
--- a/src/input_common/motion_from_button.cpp
+++ b/src/input_common/motion_from_button.cpp
@@ -11,7 +11,7 @@ class MotionKey final : public Input::MotionDevice {
 public:
     using Button = std::unique_ptr<Input::ButtonDevice>;
 
-    MotionKey(Button key_) : key(std::move(key_)) {}
+    explicit MotionKey(Button key_) : key(std::move(key_)) {}
 
     Input::MotionStatus GetStatus() const override {
 
diff --git a/src/input_common/motion_input.cpp b/src/input_common/motion_input.cpp
index e89019723..f77ba535d 100644
--- a/src/input_common/motion_input.cpp
+++ b/src/input_common/motion_input.cpp
@@ -8,8 +8,7 @@
 
 namespace InputCommon {
 
-MotionInput::MotionInput(f32 new_kp, f32 new_ki, f32 new_kd)
-    : kp(new_kp), ki(new_ki), kd(new_kd), quat{{0, 0, -1}, 0} {}
+MotionInput::MotionInput(f32 new_kp, f32 new_ki, f32 new_kd) : kp(new_kp), ki(new_ki), kd(new_kd) {}
 
 void MotionInput::SetAcceleration(const Common::Vec3f& acceleration) {
     accel = acceleration;
@@ -59,7 +58,7 @@ bool MotionInput::IsCalibrated(f32 sensitivity) const {
 }
 
 void MotionInput::UpdateRotation(u64 elapsed_time) {
-    const f32 sample_period = elapsed_time / 1000000.0f;
+    const auto sample_period = static_cast<f32>(elapsed_time) / 1000000.0f;
     if (sample_period > 0.1f) {
         return;
     }
@@ -75,7 +74,7 @@ void MotionInput::UpdateOrientation(u64 elapsed_time) {
     f32 q2 = quat.xyz[0];
     f32 q3 = quat.xyz[1];
     f32 q4 = quat.xyz[2];
-    const f32 sample_period = elapsed_time / 1000000.0f;
+    const auto sample_period = static_cast<f32>(elapsed_time) / 1000000.0f;
 
     // Ignore invalid elapsed time
     if (sample_period > 0.1f) {
@@ -203,21 +202,21 @@ Input::MotionStatus MotionInput::GetRandomMotion(int accel_magnitude, int gyro_m
     std::random_device device;
     std::mt19937 gen(device());
     std::uniform_int_distribution<s16> distribution(-1000, 1000);
-    const Common::Vec3f gyroscope = {
-        distribution(gen) * 0.001f,
-        distribution(gen) * 0.001f,
-        distribution(gen) * 0.001f,
+    const Common::Vec3f gyroscope{
+        static_cast<f32>(distribution(gen)) * 0.001f,
+        static_cast<f32>(distribution(gen)) * 0.001f,
+        static_cast<f32>(distribution(gen)) * 0.001f,
     };
-    const Common::Vec3f accelerometer = {
-        distribution(gen) * 0.001f,
-        distribution(gen) * 0.001f,
-        distribution(gen) * 0.001f,
+    const Common::Vec3f accelerometer{
+        static_cast<f32>(distribution(gen)) * 0.001f,
+        static_cast<f32>(distribution(gen)) * 0.001f,
+        static_cast<f32>(distribution(gen)) * 0.001f,
     };
-    const Common::Vec3f rotation = {};
-    const std::array<Common::Vec3f, 3> orientation = {
-        Common::Vec3f{1.0f, 0, 0},
-        Common::Vec3f{0, 1.0f, 0},
-        Common::Vec3f{0, 0, 1.0f},
+    constexpr Common::Vec3f rotation;
+    constexpr std::array orientation{
+        Common::Vec3f{1.0f, 0.0f, 0.0f},
+        Common::Vec3f{0.0f, 1.0f, 0.0f},
+        Common::Vec3f{0.0f, 0.0f, 1.0f},
     };
     return {accelerometer * accel_magnitude, gyroscope * gyro_magnitude, rotation, orientation};
 }
@@ -247,9 +246,6 @@ void MotionInput::SetOrientationFromAccelerometer() {
     const f32 sample_period = 0.015f;
 
     const auto normal_accel = accel.Normalized();
-    const f32 ax = -normal_accel.x;
-    const f32 ay = normal_accel.y;
-    const f32 az = -normal_accel.z;
 
     while (!IsCalibrated(0.01f) && ++iterations < 100) {
         // Short name local variable for readability
@@ -258,7 +254,7 @@ void MotionInput::SetOrientationFromAccelerometer() {
         f32 q3 = quat.xyz[1];
         f32 q4 = quat.xyz[2];
 
-        Common::Vec3f rad_gyro = {};
+        Common::Vec3f rad_gyro;
         const f32 ax = -normal_accel.x;
         const f32 ay = normal_accel.y;
         const f32 az = -normal_accel.z;
diff --git a/src/input_common/motion_input.h b/src/input_common/motion_input.h
index 6342d0318..abb957f04 100644
--- a/src/input_common/motion_input.h
+++ b/src/input_common/motion_input.h
@@ -22,7 +22,7 @@ public:
     MotionInput& operator=(MotionInput&&) = default;
 
     void SetAcceleration(const Common::Vec3f& acceleration);
-    void SetGyroscope(const Common::Vec3f& acceleration);
+    void SetGyroscope(const Common::Vec3f& gyroscope);
     void SetQuaternion(const Common::Quaternion<f32>& quaternion);
     void SetGyroDrift(const Common::Vec3f& drift);
     void SetGyroThreshold(f32 threshold);
@@ -49,16 +49,16 @@ private:
     void SetOrientationFromAccelerometer();
 
     // PID constants
-    const f32 kp;
-    const f32 ki;
-    const f32 kd;
+    f32 kp;
+    f32 ki;
+    f32 kd;
 
     // PID errors
     Common::Vec3f real_error;
     Common::Vec3f integral_error;
     Common::Vec3f derivative_error;
 
-    Common::Quaternion<f32> quat;
+    Common::Quaternion<f32> quat{{0.0f, 0.0f, -1.0f}, 0.0f};
     Common::Vec3f rotations;
     Common::Vec3f accel;
     Common::Vec3f gyro;
diff --git a/src/input_common/sdl/sdl_impl.cpp b/src/input_common/sdl/sdl_impl.cpp
index bd480570a..8c2cef35d 100644
--- a/src/input_common/sdl/sdl_impl.cpp
+++ b/src/input_common/sdl/sdl_impl.cpp
@@ -56,9 +56,9 @@ static int SDLEventWatcher(void* user_data, SDL_Event* event) {
 class SDLJoystick {
 public:
     SDLJoystick(std::string guid_, int port_, SDL_Joystick* joystick,
-                SDL_GameController* gamecontroller)
+                SDL_GameController* game_controller)
         : guid{std::move(guid_)}, port{port_}, sdl_joystick{joystick, &SDL_JoystickClose},
-          sdl_controller{gamecontroller, &SDL_GameControllerClose} {}
+          sdl_controller{game_controller, &SDL_GameControllerClose} {}
 
     void SetButton(int button, bool value) {
         std::lock_guard lock{mutex};
@@ -77,10 +77,10 @@ public:
 
     float GetAxis(int axis, float range) const {
         std::lock_guard lock{mutex};
-        return state.axes.at(axis) / (32767.0f * range);
+        return static_cast<float>(state.axes.at(axis)) / (32767.0f * range);
     }
 
-    bool RumblePlay(f32 amp_low, f32 amp_high, int time) {
+    bool RumblePlay(f32 amp_low, f32 amp_high, u32 time) {
         const u16 raw_amp_low = static_cast<u16>(amp_low * 0xFFFF);
         const u16 raw_amp_high = static_cast<u16>(amp_high * 0xFFFF);
         // Lower drastically the number of state changes
@@ -124,7 +124,7 @@ public:
         return std::make_tuple(x, y);
     }
 
-    const InputCommon::MotionInput& GetMotion() const {
+    const MotionInput& GetMotion() const {
         return motion;
     }
 
@@ -172,15 +172,15 @@ private:
     } state;
     std::string guid;
     int port;
-    u16 last_state_rumble_high;
-    u16 last_state_rumble_low;
+    u16 last_state_rumble_high = 0;
+    u16 last_state_rumble_low = 0;
     std::chrono::time_point<std::chrono::system_clock> last_vibration;
     std::unique_ptr<SDL_Joystick, decltype(&SDL_JoystickClose)> sdl_joystick;
     std::unique_ptr<SDL_GameController, decltype(&SDL_GameControllerClose)> sdl_controller;
     mutable std::mutex mutex;
 
-    // motion is initalized without PID values as motion input is not aviable for SDL2
-    InputCommon::MotionInput motion{0.0f, 0.0f, 0.0f};
+    // Motion is initialized without PID values as motion input is not aviable for SDL2
+    MotionInput motion{0.0f, 0.0f, 0.0f};
 };
 
 std::shared_ptr<SDLJoystick> SDLState::GetSDLJoystickByGUID(const std::string& guid, int port) {
@@ -192,7 +192,7 @@ std::shared_ptr<SDLJoystick> SDLState::GetSDLJoystickByGUID(const std::string& g
                                                           nullptr, nullptr);
             it->second.emplace_back(std::move(joystick));
         }
-        return it->second[port];
+        return it->second[static_cast<std::size_t>(port)];
     }
     auto joystick = std::make_shared<SDLJoystick>(guid, 0, nullptr, nullptr);
     return joystick_map[guid].emplace_back(std::move(joystick));
@@ -212,7 +212,7 @@ std::shared_ptr<SDLJoystick> SDLState::GetSDLJoystickBySDLID(SDL_JoystickID sdl_
                              return sdl_joystick == joystick->GetSDLJoystick();
                          });
         if (vec_it != map_it->second.end()) {
-            // This is the common case: There is already an existing SDL_Joystick maped to a
+            // This is the common case: There is already an existing SDL_Joystick mapped to a
             // SDLJoystick. return the SDLJoystick
             return *vec_it;
         }
@@ -220,7 +220,7 @@ std::shared_ptr<SDLJoystick> SDLState::GetSDLJoystickBySDLID(SDL_JoystickID sdl_
         // Search for a SDLJoystick without a mapped SDL_Joystick...
         const auto nullptr_it = std::find_if(map_it->second.begin(), map_it->second.end(),
                                              [](const std::shared_ptr<SDLJoystick>& joystick) {
-                                                 return !joystick->GetSDLJoystick();
+                                                 return joystick->GetSDLJoystick() == nullptr;
                                              });
         if (nullptr_it != map_it->second.end()) {
             // ... and map it
@@ -273,22 +273,21 @@ void SDLState::InitJoystick(int joystick_index) {
 void SDLState::CloseJoystick(SDL_Joystick* sdl_joystick) {
     const std::string guid = GetGUID(sdl_joystick);
 
-    std::shared_ptr<SDLJoystick> joystick;
+    std::shared_ptr<SDLJoystick> found_joystick;
     {
         std::lock_guard lock{joystick_map_mutex};
         // This call to guid is safe since the joystick is guaranteed to be in the map
         const auto& joystick_guid_list = joystick_map[guid];
-        const auto joystick_it =
-            std::find_if(joystick_guid_list.begin(), joystick_guid_list.end(),
-                         [&sdl_joystick](const std::shared_ptr<SDLJoystick>& joystick) {
-                             return joystick->GetSDLJoystick() == sdl_joystick;
-                         });
-        joystick = *joystick_it;
+        const auto joystick_it = std::find_if(joystick_guid_list.begin(), joystick_guid_list.end(),
+                                              [&sdl_joystick](const auto& joystick) {
+                                                  return joystick->GetSDLJoystick() == sdl_joystick;
+                                              });
+        found_joystick = *joystick_it;
     }
 
     // Destruct SDL_Joystick outside the lock guard because SDL can internally call the
     // event callback which locks the mutex again.
-    joystick->SetSDLJoystick(nullptr, nullptr);
+    found_joystick->SetSDLJoystick(nullptr, nullptr);
 }
 
 void SDLState::HandleGameControllerEvent(const SDL_Event& event) {
@@ -392,8 +391,8 @@ private:
 
 class SDLAnalog final : public Input::AnalogDevice {
 public:
-    SDLAnalog(std::shared_ptr<SDLJoystick> joystick_, int axis_x_, int axis_y_, float deadzone_,
-              float range_)
+    explicit SDLAnalog(std::shared_ptr<SDLJoystick> joystick_, int axis_x_, int axis_y_,
+                       float deadzone_, float range_)
         : joystick(std::move(joystick_)), axis_x(axis_x_), axis_y(axis_y_), deadzone(deadzone_),
           range(range_) {}
 
@@ -672,13 +671,13 @@ SDLState::SDLState() {
     RegisterFactory<ButtonDevice>("sdl", button_factory);
     RegisterFactory<MotionDevice>("sdl", motion_factory);
 
-    // If the frontend is going to manage the event loop, then we dont start one here
-    start_thread = !SDL_WasInit(SDL_INIT_JOYSTICK);
+    // If the frontend is going to manage the event loop, then we don't start one here
+    start_thread = SDL_WasInit(SDL_INIT_JOYSTICK) == 0;
     if (start_thread && SDL_Init(SDL_INIT_JOYSTICK) < 0) {
         LOG_CRITICAL(Input, "SDL_Init(SDL_INIT_JOYSTICK) failed with: {}", SDL_GetError());
         return;
     }
-    has_gamecontroller = SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER);
+    has_gamecontroller = SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER) != 0;
     if (SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1") == SDL_FALSE) {
         LOG_ERROR(Input, "Failed to set hint for background events with: {}", SDL_GetError());
     }
@@ -723,8 +722,8 @@ std::vector<Common::ParamPackage> SDLState::GetInputDevices() {
     std::vector<Common::ParamPackage> devices;
     for (const auto& [key, value] : joystick_map) {
         for (const auto& joystick : value) {
-            auto joy = joystick->GetSDLJoystick();
-            if (auto controller = joystick->GetSDLGameController()) {
+            auto* joy = joystick->GetSDLJoystick();
+            if (auto* controller = joystick->GetSDLGameController()) {
                 std::string name =
                     fmt::format("{} {}", SDL_GameControllerName(controller), joystick->GetPort());
                 devices.emplace_back(Common::ParamPackage{
@@ -748,7 +747,7 @@ std::vector<Common::ParamPackage> SDLState::GetInputDevices() {
 }
 
 namespace {
-Common::ParamPackage BuildAnalogParamPackageForButton(int port, std::string guid, u8 axis,
+Common::ParamPackage BuildAnalogParamPackageForButton(int port, std::string guid, s32 axis,
                                                       float value = 0.1f) {
     Common::ParamPackage params({{"engine", "sdl"}});
     params.Set("port", port);
@@ -764,7 +763,7 @@ Common::ParamPackage BuildAnalogParamPackageForButton(int port, std::string guid
     return params;
 }
 
-Common::ParamPackage BuildButtonParamPackageForButton(int port, std::string guid, u8 button) {
+Common::ParamPackage BuildButtonParamPackageForButton(int port, std::string guid, s32 button) {
     Common::ParamPackage params({{"engine", "sdl"}});
     params.Set("port", port);
     params.Set("guid", std::move(guid));
@@ -772,7 +771,7 @@ Common::ParamPackage BuildButtonParamPackageForButton(int port, std::string guid
     return params;
 }
 
-Common::ParamPackage BuildHatParamPackageForButton(int port, std::string guid, u8 hat, u8 value) {
+Common::ParamPackage BuildHatParamPackageForButton(int port, std::string guid, s32 hat, s32 value) {
     Common::ParamPackage params({{"engine", "sdl"}});
 
     params.Set("port", port);
@@ -802,17 +801,19 @@ Common::ParamPackage SDLEventToButtonParamPackage(SDLState& state, const SDL_Eve
     case SDL_JOYAXISMOTION: {
         const auto joystick = state.GetSDLJoystickBySDLID(event.jaxis.which);
         return BuildAnalogParamPackageForButton(joystick->GetPort(), joystick->GetGUID(),
-                                                event.jaxis.axis, event.jaxis.value);
+                                                static_cast<s32>(event.jaxis.axis),
+                                                event.jaxis.value);
     }
     case SDL_JOYBUTTONUP: {
         const auto joystick = state.GetSDLJoystickBySDLID(event.jbutton.which);
         return BuildButtonParamPackageForButton(joystick->GetPort(), joystick->GetGUID(),
-                                                event.jbutton.button);
+                                                static_cast<s32>(event.jbutton.button));
     }
     case SDL_JOYHATMOTION: {
         const auto joystick = state.GetSDLJoystickBySDLID(event.jhat.which);
         return BuildHatParamPackageForButton(joystick->GetPort(), joystick->GetGUID(),
-                                             event.jhat.hat, event.jhat.value);
+                                             static_cast<s32>(event.jhat.hat),
+                                             static_cast<s32>(event.jhat.value));
     }
     }
     return {};
@@ -823,17 +824,19 @@ Common::ParamPackage SDLEventToMotionParamPackage(SDLState& state, const SDL_Eve
     case SDL_JOYAXISMOTION: {
         const auto joystick = state.GetSDLJoystickBySDLID(event.jaxis.which);
         return BuildAnalogParamPackageForButton(joystick->GetPort(), joystick->GetGUID(),
-                                                event.jaxis.axis, event.jaxis.value);
+                                                static_cast<s32>(event.jaxis.axis),
+                                                event.jaxis.value);
     }
     case SDL_JOYBUTTONUP: {
         const auto joystick = state.GetSDLJoystickBySDLID(event.jbutton.which);
         return BuildButtonParamPackageForButton(joystick->GetPort(), joystick->GetGUID(),
-                                                event.jbutton.button);
+                                                static_cast<s32>(event.jbutton.button));
     }
     case SDL_JOYHATMOTION: {
         const auto joystick = state.GetSDLJoystickBySDLID(event.jhat.which);
         return BuildHatParamPackageForButton(joystick->GetPort(), joystick->GetGUID(),
-                                             event.jhat.hat, event.jhat.value);
+                                             static_cast<s32>(event.jhat.hat),
+                                             static_cast<s32>(event.jhat.value));
     }
     }
     return {};
@@ -1062,7 +1065,7 @@ public:
             if (event.type == SDL_JOYAXISMOTION) {
                 const auto axis = event.jaxis.axis;
                 const auto joystick = state.GetSDLJoystickBySDLID(event.jaxis.which);
-                const auto controller = joystick->GetSDLGameController();
+                auto* const controller = joystick->GetSDLGameController();
                 if (controller) {
                     const auto axis_left_x =
                         SDL_GameControllerGetBindForAxis(controller, SDL_CONTROLLER_AXIS_LEFTX)
diff --git a/src/input_common/touch_from_button.cpp b/src/input_common/touch_from_button.cpp
index 98da0ef1a..c37716aae 100644
--- a/src/input_common/touch_from_button.cpp
+++ b/src/input_common/touch_from_button.cpp
@@ -11,9 +11,11 @@ namespace InputCommon {
 class TouchFromButtonDevice final : public Input::TouchDevice {
 public:
     TouchFromButtonDevice() {
-        for (const auto& config_entry :
-             Settings::values.touch_from_button_maps[Settings::values.touch_from_button_map_index]
-                 .buttons) {
+        const auto button_index =
+            static_cast<std::size_t>(Settings::values.touch_from_button_map_index);
+        const auto& buttons = Settings::values.touch_from_button_maps[button_index].buttons;
+
+        for (const auto& config_entry : buttons) {
             const Common::ParamPackage package{config_entry};
             map.emplace_back(
                 Input::CreateDevice<Input::ButtonDevice>(config_entry),
diff --git a/src/input_common/udp/client.cpp b/src/input_common/udp/client.cpp
index 9d0b9f31d..bb109562c 100644
--- a/src/input_common/udp/client.cpp
+++ b/src/input_common/udp/client.cpp
@@ -26,11 +26,11 @@ class Socket {
 public:
     using clock = std::chrono::system_clock;
 
-    explicit Socket(const std::string& host, u16 port, u8 pad_index, u32 client_id,
-                    SocketCallback callback)
-        : callback(std::move(callback)), timer(io_service),
-          socket(io_service, udp::endpoint(udp::v4(), 0)), client_id(client_id),
-          pad_index(pad_index) {
+    explicit Socket(const std::string& host, u16 port, std::size_t pad_index_, u32 client_id_,
+                    SocketCallback callback_)
+        : callback(std::move(callback_)), timer(io_service),
+          socket(io_service, udp::endpoint(udp::v4(), 0)), client_id(client_id_),
+          pad_index(pad_index_) {
         boost::system::error_code ec{};
         auto ipv4 = boost::asio::ip::make_address_v4(host, ec);
         if (ec.value() != boost::system::errc::success) {
@@ -93,13 +93,17 @@ private:
     void HandleSend(const boost::system::error_code& error) {
         boost::system::error_code _ignored{};
         // Send a request for getting port info for the pad
-        Request::PortInfo port_info{1, {pad_index, 0, 0, 0}};
+        const Request::PortInfo port_info{1, {static_cast<u8>(pad_index), 0, 0, 0}};
         const auto port_message = Request::Create(port_info, client_id);
         std::memcpy(&send_buffer1, &port_message, PORT_INFO_SIZE);
         socket.send_to(boost::asio::buffer(send_buffer1), send_endpoint, {}, _ignored);
 
         // Send a request for getting pad data for the pad
-        Request::PadData pad_data{Request::PadData::Flags::Id, pad_index, EMPTY_MAC_ADDRESS};
+        const Request::PadData pad_data{
+            Request::PadData::Flags::Id,
+            static_cast<u8>(pad_index),
+            EMPTY_MAC_ADDRESS,
+        };
         const auto pad_message = Request::Create(pad_data, client_id);
         std::memcpy(send_buffer2.data(), &pad_message, PAD_DATA_SIZE);
         socket.send_to(boost::asio::buffer(send_buffer2), send_endpoint, {}, _ignored);
@@ -112,7 +116,7 @@ private:
     udp::socket socket;
 
     u32 client_id{};
-    u8 pad_index{};
+    std::size_t pad_index{};
 
     static constexpr std::size_t PORT_INFO_SIZE = sizeof(Message<Request::PortInfo>);
     static constexpr std::size_t PAD_DATA_SIZE = sizeof(Message<Request::PadData>);
@@ -133,7 +137,7 @@ static void SocketLoop(Socket* socket) {
 Client::Client() {
     LOG_INFO(Input, "Udp Initialization started");
     for (std::size_t client = 0; client < clients.size(); client++) {
-        u8 pad = client % 4;
+        const auto pad = client % 4;
         StartCommunication(client, Settings::values.udp_input_address,
                            Settings::values.udp_input_port, pad, 24872);
         // Set motion parameters
@@ -166,9 +170,9 @@ std::vector<Common::ParamPackage> Client::GetInputDevices() const {
 bool Client::DeviceConnected(std::size_t pad) const {
     // Use last timestamp to detect if the socket has stopped sending data
     const auto now = std::chrono::system_clock::now();
-    u64 time_difference =
+    const auto time_difference = static_cast<u64>(
         std::chrono::duration_cast<std::chrono::milliseconds>(now - clients[pad].last_motion_update)
-            .count();
+            .count());
     return time_difference < 1000 && clients[pad].active == 1;
 }
 
@@ -177,9 +181,9 @@ void Client::ReloadUDPClient() {
         ReloadSocket(Settings::values.udp_input_address, Settings::values.udp_input_port, client);
     }
 }
-void Client::ReloadSocket(const std::string& host, u16 port, u8 pad_index, u32 client_id) {
+void Client::ReloadSocket(const std::string& host, u16 port, std::size_t pad_index, u32 client_id) {
     // client number must be determined from host / port and pad index
-    std::size_t client = pad_index;
+    const std::size_t client = pad_index;
     clients[client].socket->Stop();
     clients[client].thread.join();
     StartCommunication(client, host, port, pad_index, client_id);
@@ -194,8 +198,8 @@ void Client::OnPortInfo(Response::PortInfo data) {
 }
 
 void Client::OnPadData(Response::PadData data) {
-    // client number must be determined from host / port and pad index
-    std::size_t client = data.info.id;
+    // Client number must be determined from host / port and pad index
+    const std::size_t client = data.info.id;
     LOG_TRACE(Input, "PadData packet received");
     if (data.packet_counter == clients[client].packet_sequence) {
         LOG_WARNING(
@@ -207,11 +211,12 @@ void Client::OnPadData(Response::PadData data) {
     clients[client].active = data.info.is_pad_active;
     clients[client].packet_sequence = data.packet_counter;
     const auto now = std::chrono::system_clock::now();
-    u64 time_difference = std::chrono::duration_cast<std::chrono::microseconds>(
-                              now - clients[client].last_motion_update)
-                              .count();
+    const auto time_difference =
+        static_cast<u64>(std::chrono::duration_cast<std::chrono::microseconds>(
+                             now - clients[client].last_motion_update)
+                             .count());
     clients[client].last_motion_update = now;
-    Common::Vec3f raw_gyroscope = {data.gyro.pitch, data.gyro.roll, -data.gyro.yaw};
+    const Common::Vec3f raw_gyroscope = {data.gyro.pitch, data.gyro.roll, -data.gyro.yaw};
     clients[client].motion.SetAcceleration({data.accel.x, -data.accel.z, data.accel.y});
     // Gyroscope values are not it the correct scale from better joy.
     // Dividing by 312 allows us to make one full turn = 1 turn
@@ -237,9 +242,11 @@ void Client::OnPadData(Response::PadData data) {
             const u16 min_y = clients[client].status.touch_calibration->min_y;
             const u16 max_y = clients[client].status.touch_calibration->max_y;
 
-            x = (std::clamp(static_cast<u16>(data.touch_1.x), min_x, max_x) - min_x) /
+            x = static_cast<float>(std::clamp(static_cast<u16>(data.touch_1.x), min_x, max_x) -
+                                   min_x) /
                 static_cast<float>(max_x - min_x);
-            y = (std::clamp(static_cast<u16>(data.touch_1.y), min_y, max_y) - min_y) /
+            y = static_cast<float>(std::clamp(static_cast<u16>(data.touch_1.y), min_y, max_y) -
+                                   min_y) /
                 static_cast<float>(max_y - min_y);
         }
 
@@ -253,8 +260,8 @@ void Client::OnPadData(Response::PadData data) {
     }
 }
 
-void Client::StartCommunication(std::size_t client, const std::string& host, u16 port, u8 pad_index,
-                                u32 client_id) {
+void Client::StartCommunication(std::size_t client, const std::string& host, u16 port,
+                                std::size_t pad_index, u32 client_id) {
     SocketCallback callback{[this](Response::Version version) { OnVersion(version); },
                             [this](Response::PortInfo info) { OnPortInfo(info); },
                             [this](Response::PadData data) { OnPadData(data); }};
@@ -264,9 +271,9 @@ void Client::StartCommunication(std::size_t client, const std::string& host, u16
 }
 
 void Client::Reset() {
-    for (std::size_t client = 0; client < clients.size(); client++) {
-        clients[client].socket->Stop();
-        clients[client].thread.join();
+    for (auto& client : clients) {
+        client.socket->Stop();
+        client.thread.join();
     }
 }
 
@@ -325,7 +332,7 @@ const std::array<Common::SPSCQueue<UDPPadStatus>, 4>& Client::GetPadQueue() cons
     return pad_queue;
 }
 
-void TestCommunication(const std::string& host, u16 port, u8 pad_index, u32 client_id,
+void TestCommunication(const std::string& host, u16 port, std::size_t pad_index, u32 client_id,
                        std::function<void()> success_callback,
                        std::function<void()> failure_callback) {
     std::thread([=] {
@@ -346,7 +353,7 @@ void TestCommunication(const std::string& host, u16 port, u8 pad_index, u32 clie
 }
 
 CalibrationConfigurationJob::CalibrationConfigurationJob(
-    const std::string& host, u16 port, u8 pad_index, u32 client_id,
+    const std::string& host, u16 port, std::size_t pad_index, u32 client_id,
     std::function<void(Status)> status_callback,
     std::function<void(u16, u16, u16, u16)> data_callback) {
 
@@ -366,7 +373,7 @@ CalibrationConfigurationJob::CalibrationConfigurationJob(
                                         current_status = Status::Ready;
                                         status_callback(current_status);
                                     }
-                                    if (!data.touch_1.is_active) {
+                                    if (data.touch_1.is_active == 0) {
                                         return;
                                     }
                                     LOG_DEBUG(Input, "Current touch: {} {}", data.touch_1.x,
diff --git a/src/input_common/udp/client.h b/src/input_common/udp/client.h
index 523dc6a7a..2491a03a2 100644
--- a/src/input_common/udp/client.h
+++ b/src/input_common/udp/client.h
@@ -84,8 +84,8 @@ public:
 
     bool DeviceConnected(std::size_t pad) const;
     void ReloadUDPClient();
-    void ReloadSocket(const std::string& host = "127.0.0.1", u16 port = 26760, u8 pad_index = 0,
-                      u32 client_id = 24872);
+    void ReloadSocket(const std::string& host = "127.0.0.1", u16 port = 26760,
+                      std::size_t pad_index = 0, u32 client_id = 24872);
 
     std::array<Common::SPSCQueue<UDPPadStatus>, 4>& GetPadQueue();
     const std::array<Common::SPSCQueue<UDPPadStatus>, 4>& GetPadQueue() const;
@@ -99,7 +99,7 @@ private:
         DeviceStatus status;
         std::thread thread;
         u64 packet_sequence = 0;
-        u8 active;
+        u8 active = 0;
 
         // Realtime values
         // motion is initalized with PID values for drift correction on joycons
@@ -113,8 +113,8 @@ private:
     void OnVersion(Response::Version);
     void OnPortInfo(Response::PortInfo);
     void OnPadData(Response::PadData);
-    void StartCommunication(std::size_t client, const std::string& host, u16 port, u8 pad_index,
-                            u32 client_id);
+    void StartCommunication(std::size_t client, const std::string& host, u16 port,
+                            std::size_t pad_index, u32 client_id);
     void UpdateYuzuSettings(std::size_t client, const Common::Vec3<float>& acc,
                             const Common::Vec3<float>& gyro, bool touch);
 
@@ -139,7 +139,7 @@ public:
      * @param status_callback Callback for job status updates
      * @param data_callback Called when calibration data is ready
      */
-    explicit CalibrationConfigurationJob(const std::string& host, u16 port, u8 pad_index,
+    explicit CalibrationConfigurationJob(const std::string& host, u16 port, std::size_t pad_index,
                                          u32 client_id, std::function<void(Status)> status_callback,
                                          std::function<void(u16, u16, u16, u16)> data_callback);
     ~CalibrationConfigurationJob();
@@ -149,7 +149,7 @@ private:
     Common::Event complete_event;
 };
 
-void TestCommunication(const std::string& host, u16 port, u8 pad_index, u32 client_id,
+void TestCommunication(const std::string& host, u16 port, std::size_t pad_index, u32 client_id,
                        std::function<void()> success_callback,
                        std::function<void()> failure_callback);
 
diff --git a/src/input_common/udp/udp.cpp b/src/input_common/udp/udp.cpp
index eba077a36..71a76a7aa 100644
--- a/src/input_common/udp/udp.cpp
+++ b/src/input_common/udp/udp.cpp
@@ -2,8 +2,6 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <atomic>
-#include <list>
 #include <mutex>
 #include <utility>
 #include "common/assert.h"
@@ -15,8 +13,8 @@ namespace InputCommon {
 
 class UDPMotion final : public Input::MotionDevice {
 public:
-    UDPMotion(std::string ip_, int port_, int pad_, CemuhookUDP::Client* client_)
-        : ip(ip_), port(port_), pad(pad_), client(client_) {}
+    explicit UDPMotion(std::string ip_, int port_, u32 pad_, CemuhookUDP::Client* client_)
+        : ip(std::move(ip_)), port(port_), pad(pad_), client(client_) {}
 
     Input::MotionStatus GetStatus() const override {
         return client->GetPadState(pad).motion_status;
@@ -25,7 +23,7 @@ public:
 private:
     const std::string ip;
     const int port;
-    const int pad;
+    const u32 pad;
     CemuhookUDP::Client* client;
     mutable std::mutex mutex;
 };
@@ -40,11 +38,11 @@ UDPMotionFactory::UDPMotionFactory(std::shared_ptr<CemuhookUDP::Client> client_)
  *     - "port": the nth jcpad on the adapter
  */
 std::unique_ptr<Input::MotionDevice> UDPMotionFactory::Create(const Common::ParamPackage& params) {
-    const std::string ip = params.Get("ip", "127.0.0.1");
-    const int port = params.Get("port", 26760);
-    const int pad = params.Get("pad_index", 0);
+    auto ip = params.Get("ip", "127.0.0.1");
+    const auto port = params.Get("port", 26760);
+    const auto pad = static_cast<u32>(params.Get("pad_index", 0));
 
-    return std::make_unique<UDPMotion>(ip, port, pad, client.get());
+    return std::make_unique<UDPMotion>(std::move(ip), port, pad, client.get());
 }
 
 void UDPMotionFactory::BeginConfiguration() {
@@ -79,7 +77,7 @@ Common::ParamPackage UDPMotionFactory::GetNextInput() {
 
 class UDPTouch final : public Input::TouchDevice {
 public:
-    UDPTouch(std::string ip_, int port_, int pad_, CemuhookUDP::Client* client_)
+    explicit UDPTouch(std::string ip_, int port_, u32 pad_, CemuhookUDP::Client* client_)
         : ip(std::move(ip_)), port(port_), pad(pad_), client(client_) {}
 
     std::tuple<float, float, bool> GetStatus() const override {
@@ -89,7 +87,7 @@ public:
 private:
     const std::string ip;
     const int port;
-    const int pad;
+    const u32 pad;
     CemuhookUDP::Client* client;
     mutable std::mutex mutex;
 };
@@ -104,11 +102,11 @@ UDPTouchFactory::UDPTouchFactory(std::shared_ptr<CemuhookUDP::Client> client_)
  *     - "port": the nth jcpad on the adapter
  */
 std::unique_ptr<Input::TouchDevice> UDPTouchFactory::Create(const Common::ParamPackage& params) {
-    const std::string ip = params.Get("ip", "127.0.0.1");
-    const int port = params.Get("port", 26760);
-    const int pad = params.Get("pad_index", 0);
+    auto ip = params.Get("ip", "127.0.0.1");
+    const auto port = params.Get("port", 26760);
+    const auto pad = static_cast<u32>(params.Get("pad_index", 0));
 
-    return std::make_unique<UDPTouch>(ip, port, pad, client.get());
+    return std::make_unique<UDPTouch>(std::move(ip), port, pad, client.get());
 }
 
 void UDPTouchFactory::BeginConfiguration() {