3 files changed, 159 insertions, 54 deletions

diff --git a/src/input_common/gcadapter/gc_adapter.cpp b/src/input_common/gcadapter/gc_adapter.cpp
index 74759ea7d..c95feb0d7 100644
--- a/src/input_common/gcadapter/gc_adapter.cpp
+++ b/src/input_common/gcadapter/gc_adapter.cpp
@@ -4,13 +4,24 @@
 
 #include <chrono>
 #include <thread>
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4200) // nonstandard extension used : zero-sized array in struct/union
+#endif
 #include <libusb.h>
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
 #include "common/logging/log.h"
+#include "common/param_package.h"
 #include "input_common/gcadapter/gc_adapter.h"
+#include "input_common/settings.h"
 
 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,
@@ -18,6 +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;
@@ -67,17 +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];
         }
 
@@ -89,17 +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");
 
@@ -239,7 +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;
@@ -283,7 +295,93 @@ void Adapter::Reset() {
     }
 }
 
-bool Adapter::DeviceConnected(std::size_t port) {
+std::vector<Common::ParamPackage> Adapter::GetInputDevices() const {
+    std::vector<Common::ParamPackage> devices;
+    for (std::size_t port = 0; port < state.size(); ++port) {
+        if (!DeviceConnected(port)) {
+            continue;
+        }
+        std::string name = fmt::format("Gamecube Controller {}", port);
+        devices.emplace_back(Common::ParamPackage{
+            {"class", "gcpad"},
+            {"display", std::move(name)},
+            {"port", std::to_string(port)},
+        });
+    }
+    return devices;
+}
+
+InputCommon::ButtonMapping Adapter::GetButtonMappingForDevice(
+    const Common::ParamPackage& params) const {
+    // This list is missing ZL/ZR since those are not considered buttons.
+    // We will add those afterwards
+    // This list also excludes any button that can't be really mapped
+    static constexpr std::array<std::pair<Settings::NativeButton::Values, PadButton>, 12>
+        switch_to_gcadapter_button = {
+            std::pair{Settings::NativeButton::A, PadButton::PAD_BUTTON_A},
+            {Settings::NativeButton::B, PadButton::PAD_BUTTON_B},
+            {Settings::NativeButton::X, PadButton::PAD_BUTTON_X},
+            {Settings::NativeButton::Y, PadButton::PAD_BUTTON_Y},
+            {Settings::NativeButton::Plus, PadButton::PAD_BUTTON_START},
+            {Settings::NativeButton::DLeft, PadButton::PAD_BUTTON_LEFT},
+            {Settings::NativeButton::DUp, PadButton::PAD_BUTTON_UP},
+            {Settings::NativeButton::DRight, PadButton::PAD_BUTTON_RIGHT},
+            {Settings::NativeButton::DDown, PadButton::PAD_BUTTON_DOWN},
+            {Settings::NativeButton::SL, PadButton::PAD_TRIGGER_L},
+            {Settings::NativeButton::SR, PadButton::PAD_TRIGGER_R},
+            {Settings::NativeButton::R, PadButton::PAD_TRIGGER_Z},
+        };
+    if (!params.Has("port")) {
+        return {};
+    }
+
+    InputCommon::ButtonMapping mapping{};
+    for (const auto& [switch_button, gcadapter_button] : switch_to_gcadapter_button) {
+        Common::ParamPackage button_params({{"engine", "gcpad"}});
+        button_params.Set("port", params.Get("port", 0));
+        button_params.Set("button", static_cast<int>(gcadapter_button));
+        mapping.insert_or_assign(switch_button, std::move(button_params));
+    }
+
+    // Add the missing bindings for ZL/ZR
+    static constexpr std::array<std::pair<Settings::NativeButton::Values, PadAxes>, 2>
+        switch_to_gcadapter_axis = {
+            std::pair{Settings::NativeButton::ZL, PadAxes::TriggerLeft},
+            {Settings::NativeButton::ZR, PadAxes::TriggerRight},
+        };
+    for (const auto& [switch_button, gcadapter_axis] : switch_to_gcadapter_axis) {
+        Common::ParamPackage button_params({{"engine", "gcpad"}});
+        button_params.Set("port", params.Get("port", 0));
+        button_params.Set("button", static_cast<int>(PadButton::PAD_STICK));
+        button_params.Set("axis", static_cast<int>(gcadapter_axis));
+        mapping.insert_or_assign(switch_button, std::move(button_params));
+    }
+    return mapping;
+}
+
+InputCommon::AnalogMapping Adapter::GetAnalogMappingForDevice(
+    const Common::ParamPackage& params) const {
+    if (!params.Has("port")) {
+        return {};
+    }
+
+    InputCommon::AnalogMapping mapping = {};
+    Common::ParamPackage left_analog_params;
+    left_analog_params.Set("engine", "gcpad");
+    left_analog_params.Set("port", params.Get("port", 0));
+    left_analog_params.Set("axis_x", static_cast<int>(PadAxes::StickX));
+    left_analog_params.Set("axis_y", static_cast<int>(PadAxes::StickY));
+    mapping.insert_or_assign(Settings::NativeAnalog::LStick, std::move(left_analog_params));
+    Common::ParamPackage right_analog_params;
+    right_analog_params.Set("engine", "gcpad");
+    right_analog_params.Set("port", params.Get("port", 0));
+    right_analog_params.Set("axis_x", static_cast<int>(PadAxes::SubstickX));
+    right_analog_params.Set("axis_y", static_cast<int>(PadAxes::SubstickY));
+    mapping.insert_or_assign(Settings::NativeAnalog::RStick, std::move(right_analog_params));
+    return mapping;
+}
+
+bool Adapter::DeviceConnected(std::size_t port) const {
     return adapter_controllers_status[port] != ControllerTypes::None;
 }
 
@@ -322,7 +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 bed81915c..4f5f3de8e 100644
--- a/src/input_common/gcadapter/gc_adapter.h
+++ b/src/input_common/gcadapter/gc_adapter.h
@@ -10,6 +10,7 @@
 #include <unordered_map>
 #include "common/common_types.h"
 #include "common/threadsafe_queue.h"
+#include "input_common/main.h"
 
 struct libusb_context;
 struct libusb_device;
@@ -59,7 +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 };
@@ -75,8 +76,12 @@ public:
     void BeginConfiguration();
     void EndConfiguration();
 
+    std::vector<Common::ParamPackage> GetInputDevices() const;
+    InputCommon::ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& params) const;
+    InputCommon::AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& params) const;
+
     /// Returns true if there is a device connected to port
-    bool DeviceConnected(std::size_t port);
+    bool DeviceConnected(std::size_t port) const;
 
     std::array<Common::SPSCQueue<GCPadStatus>, 4>& GetPadQueue();
     const std::array<Common::SPSCQueue<GCPadStatus>, 4>& GetPadQueue() const;
@@ -84,13 +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 b346fdf8e..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_, GCAdapter::Adapter* adapter)
+    explicit GCButton(u32 port_, int button_, const GCAdapter::Adapter* adapter)
         : port(port_), button(button_), gcadapter(adapter) {}
 
     ~GCButton() override;
@@ -28,17 +28,18 @@ public:
     }
 
 private:
-    const int port;
+    const u32 port;
     const int button;
-    GCAdapter::Adapter* gcadapter;
+    const GCAdapter::Adapter* gcadapter;
 };
 
 class GCAxisButton final : public Input::ButtonDevice {
 public:
-    explicit GCAxisButton(int port_, int axis_, float threshold_, bool trigger_if_greater_,
-                          GCAdapter::Adapter* adapter)
+    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), origin_value(adapter->GetOriginValue(port_, axis_)) {}
+          gcadapter(adapter),
+          origin_value(static_cast<float>(adapter->GetOriginValue(port_, axis_))) {}
 
     bool GetStatus() const override {
         if (gcadapter->DeviceConnected(port)) {
@@ -55,11 +56,11 @@ public:
     }
 
 private:
-    const int port;
-    const int axis;
+    const u32 port;
+    const u32 axis;
     float threshold;
     bool trigger_if_greater;
-    GCAdapter::Adapter* gcadapter;
+    const GCAdapter::Adapter* gcadapter;
     const float origin_value;
 };
 
@@ -69,8 +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);
 
@@ -148,24 +149,27 @@ void GCButtonFactory::EndConfiguration() {
 
 class GCAnalog final : public Input::AnalogDevice {
 public:
-    GCAnalog(int port_, int axis_x_, int axis_y_, float deadzone_, 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(adapter->GetOriginValue(port_, axis_x_)),
-          origin_value_y(adapter->GetOriginValue(port_, axis_y_)), range(range_) {}
+          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.
@@ -191,7 +195,7 @@ public:
 
     bool GetAnalogDirectionStatus(Input::AnalogDirection direction) const override {
         const auto [x, y] = GetStatus();
-        const float directional_deadzone = 0.4f;
+        const float directional_deadzone = 0.5f;
         switch (direction) {
         case Input::AnalogDirection::RIGHT:
             return x > directional_deadzone;
@@ -206,11 +210,11 @@ 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;
-    GCAdapter::Adapter* gcadapter;
+    const GCAdapter::Adapter* gcadapter;
     const float origin_value_x;
     const float origin_value_y;
     const float range;
@@ -229,11 +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, .99f);
-    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);
 }
@@ -254,7 +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