3 files changed, 103 insertions, 1 deletions

diff --git a/src/input_common/gcadapter/gc_adapter.cpp b/src/input_common/gcadapter/gc_adapter.cpp
index c507c9891..89c148aba 100644
--- a/src/input_common/gcadapter/gc_adapter.cpp
+++ b/src/input_common/gcadapter/gc_adapter.cpp
@@ -15,7 +15,9 @@
 #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 {
 
@@ -292,6 +294,92 @@ void Adapter::Reset() {
     }
 }
 
+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;
 }
diff --git a/src/input_common/gcadapter/gc_adapter.h b/src/input_common/gcadapter/gc_adapter.h
index 20e97d283..75bf9fe74 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;
@@ -75,6 +76,10 @@ 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) const;
 
diff --git a/src/input_common/main.cpp b/src/input_common/main.cpp
index 062ec66b5..8da829132 100644
--- a/src/input_common/main.cpp
+++ b/src/input_common/main.cpp
@@ -22,7 +22,7 @@ namespace InputCommon {
 
 struct InputSubsystem::Impl {
     void Initialize() {
-        auto gcadapter = std::make_shared<GCAdapter::Adapter>();
+        gcadapter = std::make_shared<GCAdapter::Adapter>();
         gcbuttons = std::make_shared<GCButtonFactory>(gcadapter);
         Input::RegisterFactory<Input::ButtonDevice>("gcpad", gcbuttons);
         gcanalog = std::make_shared<GCAnalogFactory>(gcadapter);
@@ -82,6 +82,8 @@ struct InputSubsystem::Impl {
 #endif
         auto udp_devices = udp->GetInputDevices();
         devices.insert(devices.end(), udp_devices.begin(), udp_devices.end());
+        auto gcpad_devices = gcadapter->GetInputDevices();
+        devices.insert(devices.end(), gcpad_devices.begin(), gcpad_devices.end());
         return devices;
     }
 
@@ -94,6 +96,9 @@ struct InputSubsystem::Impl {
             // TODO consider returning the SDL key codes for the default keybindings
             return {};
         }
+        if (params.Get("class", "") == "gcpad") {
+            return gcadapter->GetAnalogMappingForDevice(params);
+        }
 #ifdef HAVE_SDL2
         if (params.Get("class", "") == "sdl") {
             return sdl->GetAnalogMappingForDevice(params);
@@ -111,6 +116,9 @@ struct InputSubsystem::Impl {
             // TODO consider returning the SDL key codes for the default keybindings
             return {};
         }
+        if (params.Get("class", "") == "gcpad") {
+            return gcadapter->GetButtonMappingForDevice(params);
+        }
 #ifdef HAVE_SDL2
         if (params.Get("class", "") == "sdl") {
             return sdl->GetButtonMappingForDevice(params);
@@ -141,6 +149,7 @@ struct InputSubsystem::Impl {
     std::shared_ptr<UDPMotionFactory> udpmotion;
     std::shared_ptr<UDPTouchFactory> udptouch;
     std::shared_ptr<CemuhookUDP::Client> udp;
+    std::shared_ptr<GCAdapter::Adapter> gcadapter;
 };
 
 InputSubsystem::InputSubsystem() : impl{std::make_unique<Impl>()} {}