add input common changes

src/input_common/CMakeLists.txt

@@ -1,29 +1,49 @@
 add_library(input_common STATIC
-    analog_from_button.cpp
+    drivers/keyboard.cpp
-    analog_from_button.h
+    drivers/keyboard.h
-    keyboard.cpp
+    drivers/mouse.cpp
-    keyboard.h
+    drivers/mouse.h
+    drivers/touch_screen.cpp
+    drivers/touch_screen.h
+    drivers/udp_client.cpp
+    drivers/udp_client.h
+    drivers/virtual_gamepad.cpp
+    drivers/virtual_gamepad.h
+    helpers/stick_from_buttons.cpp
+    helpers/stick_from_buttons.h
+    helpers/touch_from_buttons.cpp
+    helpers/touch_from_buttons.h
+    helpers/udp_protocol.cpp
+    helpers/udp_protocol.h
+    input_engine.cpp
+    input_engine.h
+    input_mapping.cpp
+    input_mapping.h
+    input_poller.cpp
+    input_poller.h
     main.cpp
     main.h
-    motion_emu.cpp
-    motion_emu.h
     precompiled_headers.h
-    touch_from_button.cpp
-    touch_from_button.h
-    sdl/sdl.cpp
-    sdl/sdl.h
-    udp/client.cpp
-    udp/client.h
-    udp/protocol.cpp
-    udp/protocol.h
-    udp/udp.cpp
-    udp/udp.h
 )
 
+if (MSVC)
+    target_compile_options(input_common PRIVATE
+        /W4
+
+        /we4242 # 'identifier': conversion from 'type1' to 'type2', possible loss of data
+        /we4254 # 'operator': conversion from 'type1:field_bits' to 'type2:field_bits', possible loss of data
+        /we4800 # Implicit conversion from 'type' to bool. Possible information loss
+    )
+else()
+    target_compile_options(input_common PRIVATE
+        -Werror=conversion
+    )
+endif()
+
 if (ENABLE_SDL2)
     target_sources(input_common PRIVATE
-        sdl/sdl_impl.cpp
+        drivers/sdl_driver.cpp
-        sdl/sdl_impl.h
+        drivers/sdl_driver.h
     )
     target_link_libraries(input_common PRIVATE SDL2::SDL2)
     target_compile_definitions(input_common PRIVATE HAVE_SDL2)
@@ -31,14 +51,11 @@ endif()
 
 if (ENABLE_LIBUSB)
     target_sources(input_common PRIVATE
-        gcadapter/gc_adapter.cpp
+        drivers/gc_adapter.cpp
-        gcadapter/gc_adapter.h
+        drivers/gc_adapter.h
-        gcadapter/gc_poller.cpp
-        gcadapter/gc_poller.h
     )
-    target_include_directories(input_common PRIVATE ${LIBUSB_INCLUDE_DIR})
+    target_link_libraries(input_common PRIVATE libusb::usb)
-    target_link_libraries(input_common PRIVATE ${LIBUSB_LIBRARIES})
+    target_compile_definitions(input_common PRIVATE HAVE_LIBUSB)
-    add_definitions(-DENABLE_GCADAPTER)
 endif()
 
 create_target_directory_groups(input_common)

src/input_common/analog_from_button.cpp

@@ -1,58 +0,0 @@
-// Copyright 2017 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include "input_common/analog_from_button.h"
-
-namespace InputCommon {
-
-class Analog final : public Input::AnalogDevice {
-public:
-    using Button = std::unique_ptr<Input::ButtonDevice>;
-
-    Analog(Button up_, Button down_, Button left_, Button right_, Button modifier_,
-           float modifier_scale_)
-        : up(std::move(up_)), down(std::move(down_)), left(std::move(left_)),
-          right(std::move(right_)), modifier(std::move(modifier_)),
-          modifier_scale(modifier_scale_) {}
-
-    std::tuple<float, float> GetStatus() const override {
-        constexpr float SQRT_HALF = 0.707106781f;
-        int x = 0, y = 0;
-
-        if (right->GetStatus())
-            ++x;
-        if (left->GetStatus())
-            --x;
-        if (up->GetStatus())
-            ++y;
-        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));
-    }
-
-private:
-    Button up;
-    Button down;
-    Button left;
-    Button right;
-    Button modifier;
-    float modifier_scale;
-};
-
-std::unique_ptr<Input::AnalogDevice> AnalogFromButton::Create(const Common::ParamPackage& params) {
-    const std::string null_engine = Common::ParamPackage{{"engine", "null"}}.Serialize();
-    auto up = Input::CreateDevice<Input::ButtonDevice>(params.Get("up", null_engine));
-    auto down = Input::CreateDevice<Input::ButtonDevice>(params.Get("down", null_engine));
-    auto left = Input::CreateDevice<Input::ButtonDevice>(params.Get("left", null_engine));
-    auto right = Input::CreateDevice<Input::ButtonDevice>(params.Get("right", null_engine));
-    auto modifier = Input::CreateDevice<Input::ButtonDevice>(params.Get("modifier", null_engine));
-    auto modifier_scale = params.Get("modifier_scale", 0.5f);
-    return std::make_unique<Analog>(std::move(up), std::move(down), std::move(left),
-                                    std::move(right), std::move(modifier), modifier_scale);
-}
-
-} // namespace InputCommon

src/input_common/drivers/gc_adapter.cpp

@@ -0,0 +1,546 @@
+// SPDX-FileCopyrightText: 2014 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <fmt/format.h>
+#include <libusb.h>
+
+#include "common/logging/log.h"
+#include "common/param_package.h"
+#include "common/settings_input.h"
+#include "common/thread.h"
+#include "input_common/drivers/gc_adapter.h"
+
+namespace InputCommon {
+
+class LibUSBContext {
+public:
+    explicit LibUSBContext() {
+        init_result = libusb_init(&ctx);
+    }
+
+    ~LibUSBContext() {
+        libusb_exit(ctx);
+    }
+
+    LibUSBContext& operator=(const LibUSBContext&) = delete;
+    LibUSBContext(const LibUSBContext&) = delete;
+
+    LibUSBContext& operator=(LibUSBContext&&) noexcept = delete;
+    LibUSBContext(LibUSBContext&&) noexcept = delete;
+
+    [[nodiscard]] int InitResult() const noexcept {
+        return init_result;
+    }
+
+    [[nodiscard]] libusb_context* get() noexcept {
+        return ctx;
+    }
+
+private:
+    libusb_context* ctx;
+    int init_result{};
+};
+
+class LibUSBDeviceHandle {
+public:
+    explicit LibUSBDeviceHandle(libusb_context* ctx, uint16_t vid, uint16_t pid) noexcept {
+        handle = libusb_open_device_with_vid_pid(ctx, vid, pid);
+    }
+
+    ~LibUSBDeviceHandle() noexcept {
+        if (handle) {
+            libusb_release_interface(handle, 1);
+            libusb_close(handle);
+        }
+    }
+
+    LibUSBDeviceHandle& operator=(const LibUSBDeviceHandle&) = delete;
+    LibUSBDeviceHandle(const LibUSBDeviceHandle&) = delete;
+
+    LibUSBDeviceHandle& operator=(LibUSBDeviceHandle&&) noexcept = delete;
+    LibUSBDeviceHandle(LibUSBDeviceHandle&&) noexcept = delete;
+
+    [[nodiscard]] libusb_device_handle* get() noexcept {
+        return handle;
+    }
+
+private:
+    libusb_device_handle* handle{};
+};
+
+GCAdapter::GCAdapter(std::string input_engine_) : InputEngine(std::move(input_engine_)) {
+    if (usb_adapter_handle) {
+        return;
+    }
+    LOG_DEBUG(Input, "Initialization started");
+
+    libusb_ctx = std::make_unique<LibUSBContext>();
+    const int init_res = libusb_ctx->InitResult();
+    if (init_res == LIBUSB_SUCCESS) {
+        adapter_scan_thread =
+            std::jthread([this](std::stop_token stop_token) { AdapterScanThread(stop_token); });
+    } else {
+        LOG_ERROR(Input, "libusb could not be initialized. failed with error = {}", init_res);
+    }
+}
+
+GCAdapter::~GCAdapter() {
+    Reset();
+}
+
+void GCAdapter::AdapterInputThread(std::stop_token stop_token) {
+    LOG_DEBUG(Input, "Input thread started");
+    Common::SetCurrentThreadName("GCAdapter");
+    s32 payload_size{};
+    AdapterPayload adapter_payload{};
+
+    adapter_scan_thread = {};
+
+    while (!stop_token.stop_requested()) {
+        libusb_interrupt_transfer(usb_adapter_handle->get(), input_endpoint, adapter_payload.data(),
+                                  static_cast<s32>(adapter_payload.size()), &payload_size, 16);
+        if (IsPayloadCorrect(adapter_payload, payload_size)) {
+            UpdateControllers(adapter_payload);
+            UpdateVibrations();
+        }
+        std::this_thread::yield();
+    }
+
+    if (restart_scan_thread) {
+        adapter_scan_thread =
+            std::jthread([this](std::stop_token token) { AdapterScanThread(token); });
+        restart_scan_thread = false;
+    }
+}
+
+bool GCAdapter::IsPayloadCorrect(const AdapterPayload& adapter_payload, s32 payload_size) {
+    if (payload_size != static_cast<s32>(adapter_payload.size()) ||
+        adapter_payload[0] != LIBUSB_DT_HID) {
+        LOG_DEBUG(Input, "Error reading payload (size: {}, type: {:02x})", payload_size,
+                  adapter_payload[0]);
+        if (input_error_counter++ > 20) {
+            LOG_ERROR(Input, "Timeout, Is the adapter connected?");
+            adapter_input_thread.request_stop();
+            restart_scan_thread = true;
+        }
+        return false;
+    }
+
+    input_error_counter = 0;
+    return true;
+}
+
+void GCAdapter::UpdateControllers(const AdapterPayload& adapter_payload) {
+    for (std::size_t port = 0; port < pads.size(); ++port) {
+        const std::size_t offset = 1 + (9 * port);
+        const auto type = static_cast<ControllerTypes>(adapter_payload[offset] >> 4);
+        UpdatePadType(port, type);
+        if (DeviceConnected(port)) {
+            const u8 b1 = adapter_payload[offset + 1];
+            const u8 b2 = adapter_payload[offset + 2];
+            UpdateStateButtons(port, b1, b2);
+            UpdateStateAxes(port, adapter_payload);
+        }
+    }
+}
+
+void GCAdapter::UpdatePadType(std::size_t port, ControllerTypes pad_type) {
+    if (pads[port].type == pad_type) {
+        return;
+    }
+    // Device changed reset device and set new type
+    pads[port].axis_origin = {};
+    pads[port].reset_origin_counter = {};
+    pads[port].enable_vibration = {};
+    pads[port].rumble_amplitude = {};
+    pads[port].type = pad_type;
+}
+
+void GCAdapter::UpdateStateButtons(std::size_t port, [[maybe_unused]] u8 b1,
+                                   [[maybe_unused]] u8 b2) {
+    if (port >= pads.size()) {
+        return;
+    }
+
+    static constexpr std::array<PadButton, 8> b1_buttons{
+        PadButton::ButtonA,    PadButton::ButtonB,     PadButton::ButtonX,    PadButton::ButtonY,
+        PadButton::ButtonLeft, PadButton::ButtonRight, PadButton::ButtonDown, PadButton::ButtonUp,
+    };
+
+    static constexpr std::array<PadButton, 4> b2_buttons{
+        PadButton::ButtonStart,
+        PadButton::TriggerZ,
+        PadButton::TriggerR,
+        PadButton::TriggerL,
+    };
+
+    for (std::size_t i = 0; i < b1_buttons.size(); ++i) {
+        const bool button_status = (b1 & (1U << i)) != 0;
+        const int button = static_cast<int>(b1_buttons[i]);
+        SetButton(pads[port].identifier, button, button_status);
+    }
+
+    for (std::size_t j = 0; j < b2_buttons.size(); ++j) {
+        const bool button_status = (b2 & (1U << j)) != 0;
+        const int button = static_cast<int>(b2_buttons[j]);
+        SetButton(pads[port].identifier, button, button_status);
+    }
+}
+
+void GCAdapter::UpdateStateAxes(std::size_t port, const AdapterPayload& adapter_payload) {
+    if (port >= pads.size()) {
+        return;
+    }
+
+    const std::size_t offset = 1 + (9 * port);
+    static constexpr std::array<PadAxes, 6> axes{
+        PadAxes::StickX,    PadAxes::StickY,      PadAxes::SubstickX,
+        PadAxes::SubstickY, PadAxes::TriggerLeft, PadAxes::TriggerRight,
+    };
+
+    for (const PadAxes axis : axes) {
+        const auto index = static_cast<std::size_t>(axis);
+        const u8 axis_value = adapter_payload[offset + 3 + index];
+        if (pads[port].reset_origin_counter <= 18) {
+            if (pads[port].axis_origin[index] != axis_value) {
+                pads[port].reset_origin_counter = 0;
+            }
+            pads[port].axis_origin[index] = axis_value;
+            pads[port].reset_origin_counter++;
+        }
+        const f32 axis_status = (axis_value - pads[port].axis_origin[index]) / 100.0f;
+        SetAxis(pads[port].identifier, static_cast<int>(index), axis_status);
+    }
+}
+
+void GCAdapter::AdapterScanThread(std::stop_token stop_token) {
+    Common::SetCurrentThreadName("ScanGCAdapter");
+    usb_adapter_handle = nullptr;
+    pads = {};
+    while (!stop_token.stop_requested() && !Setup()) {
+        std::this_thread::sleep_for(std::chrono::seconds(2));
+    }
+}
+
+bool GCAdapter::Setup() {
+    constexpr u16 nintendo_vid = 0x057e;
+    constexpr u16 gc_adapter_pid = 0x0337;
+    usb_adapter_handle =
+        std::make_unique<LibUSBDeviceHandle>(libusb_ctx->get(), nintendo_vid, gc_adapter_pid);
+    if (!usb_adapter_handle->get()) {
+        return false;
+    }
+    if (!CheckDeviceAccess()) {
+        usb_adapter_handle = nullptr;
+        return false;
+    }
+
+    libusb_device* const device = libusb_get_device(usb_adapter_handle->get());
+
+    LOG_INFO(Input, "GC adapter is now connected");
+    // GC Adapter found and accessible, registering it
+    if (GetGCEndpoint(device)) {
+        rumble_enabled = true;
+        input_error_counter = 0;
+        output_error_counter = 0;
+
+        std::size_t port = 0;
+        for (GCController& pad : pads) {
+            pad.identifier = {
+                .guid = Common::UUID{},
+                .port = port++,
+                .pad = 0,
+            };
+            PreSetController(pad.identifier);
+        }
+
+        adapter_input_thread =
+            std::jthread([this](std::stop_token stop_token) { AdapterInputThread(stop_token); });
+        return true;
+    }
+    return false;
+}
+
+bool GCAdapter::CheckDeviceAccess() {
+    s32 kernel_driver_error = libusb_kernel_driver_active(usb_adapter_handle->get(), 0);
+    if (kernel_driver_error == 1) {
+        kernel_driver_error = libusb_detach_kernel_driver(usb_adapter_handle->get(), 0);
+        if (kernel_driver_error != 0 && kernel_driver_error != LIBUSB_ERROR_NOT_SUPPORTED) {
+            LOG_ERROR(Input, "libusb_detach_kernel_driver failed with error = {}",
+                      kernel_driver_error);
+        }
+    }
+
+    if (kernel_driver_error && kernel_driver_error != LIBUSB_ERROR_NOT_SUPPORTED) {
+        usb_adapter_handle = nullptr;
+        return false;
+    }
+
+    const int interface_claim_error = libusb_claim_interface(usb_adapter_handle->get(), 0);
+    if (interface_claim_error) {
+        LOG_ERROR(Input, "libusb_claim_interface failed with error = {}", interface_claim_error);
+        usb_adapter_handle = nullptr;
+        return false;
+    }
+
+    // This fixes payload problems from offbrand GCAdapters
+    const s32 control_transfer_error =
+        libusb_control_transfer(usb_adapter_handle->get(), 0x21, 11, 0x0001, 0, nullptr, 0, 1000);
+    if (control_transfer_error < 0) {
+        LOG_ERROR(Input, "libusb_control_transfer failed with error= {}", control_transfer_error);
+    }
+
+    return true;
+}
+
+bool GCAdapter::GetGCEndpoint(libusb_device* device) {
+    libusb_config_descriptor* config = nullptr;
+    const int config_descriptor_return = libusb_get_config_descriptor(device, 0, &config);
+    if (config_descriptor_return != LIBUSB_SUCCESS) {
+        LOG_ERROR(Input, "libusb_get_config_descriptor failed with error = {}",
+                  config_descriptor_return);
+        return false;
+    }
+
+    for (u8 ic = 0; ic < config->bNumInterfaces; ic++) {
+        const libusb_interface* interfaceContainer = &config->interface[ic];
+        for (int i = 0; i < interfaceContainer->num_altsetting; i++) {
+            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) != 0) {
+                    input_endpoint = endpoint->bEndpointAddress;
+                } else {
+                    output_endpoint = endpoint->bEndpointAddress;
+                }
+            }
+        }
+    }
+    // This transfer seems to be responsible for clearing the state of the adapter
+    // Used to clear the "busy" state of when the device is unexpectedly unplugged
+    unsigned char clear_payload = 0x13;
+    libusb_interrupt_transfer(usb_adapter_handle->get(), output_endpoint, &clear_payload,
+                              sizeof(clear_payload), nullptr, 16);
+    return true;
+}
+
+Common::Input::VibrationError GCAdapter::SetVibration(
+    const PadIdentifier& identifier, const Common::Input::VibrationStatus& vibration) {
+    const auto mean_amplitude = (vibration.low_amplitude + vibration.high_amplitude) * 0.5f;
+    const auto processed_amplitude =
+        static_cast<u8>((mean_amplitude + std::pow(mean_amplitude, 0.3f)) * 0.5f * 0x8);
+
+    pads[identifier.port].rumble_amplitude = processed_amplitude;
+
+    if (!rumble_enabled) {
+        return Common::Input::VibrationError::Disabled;
+    }
+    return Common::Input::VibrationError::None;
+}
+
+bool GCAdapter::IsVibrationEnabled([[maybe_unused]] const PadIdentifier& identifier) {
+    return rumble_enabled;
+}
+
+void GCAdapter::UpdateVibrations() {
+    // Use 8 states to keep the switching between on/off fast enough for
+    // a human to feel different vibration strenght
+    // More states == more rumble strengths == slower update time
+    constexpr u8 vibration_states = 8;
+
+    vibration_counter = (vibration_counter + 1) % vibration_states;
+
+    for (GCController& pad : pads) {
+        const bool vibrate = pad.rumble_amplitude > vibration_counter;
+        vibration_changed |= vibrate != pad.enable_vibration;
+        pad.enable_vibration = vibrate;
+    }
+    SendVibrations();
+}
+
+void GCAdapter::SendVibrations() {
+    if (!rumble_enabled || !vibration_changed) {
+        return;
+    }
+    s32 size{};
+    constexpr u8 rumble_command = 0x11;
+    const u8 p1 = pads[0].enable_vibration;
+    const u8 p2 = pads[1].enable_vibration;
+    const u8 p3 = pads[2].enable_vibration;
+    const u8 p4 = pads[3].enable_vibration;
+    std::array<u8, 5> payload = {rumble_command, p1, p2, p3, p4};
+    const int err =
+        libusb_interrupt_transfer(usb_adapter_handle->get(), output_endpoint, payload.data(),
+                                  static_cast<s32>(payload.size()), &size, 16);
+    if (err) {
+        LOG_DEBUG(Input, "Libusb write failed: {}", libusb_error_name(err));
+        if (output_error_counter++ > 5) {
+            LOG_ERROR(Input, "Output timeout, Rumble disabled");
+            rumble_enabled = false;
+        }
+        return;
+    }
+    output_error_counter = 0;
+    vibration_changed = false;
+}
+
+bool GCAdapter::DeviceConnected(std::size_t port) const {
+    return pads[port].type != ControllerTypes::None;
+}
+
+void GCAdapter::Reset() {
+    adapter_scan_thread = {};
+    adapter_input_thread = {};
+    usb_adapter_handle = nullptr;
+    pads = {};
+    libusb_ctx = nullptr;
+}
+
+std::vector<Common::ParamPackage> GCAdapter::GetInputDevices() const {
+    std::vector<Common::ParamPackage> devices;
+    for (std::size_t port = 0; port < pads.size(); ++port) {
+        if (!DeviceConnected(port)) {
+            continue;
+        }
+        Common::ParamPackage identifier{};
+        identifier.Set("engine", GetEngineName());
+        identifier.Set("display", fmt::format("Gamecube Controller {}", port + 1));
+        identifier.Set("port", static_cast<int>(port));
+        devices.emplace_back(identifier);
+    }
+    return devices;
+}
+
+ButtonMapping GCAdapter::GetButtonMappingForDevice(const Common::ParamPackage& params) {
+    // 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::ButtonA},
+            {Settings::NativeButton::B, PadButton::ButtonB},
+            {Settings::NativeButton::X, PadButton::ButtonX},
+            {Settings::NativeButton::Y, PadButton::ButtonY},
+            {Settings::NativeButton::Plus, PadButton::ButtonStart},
+            {Settings::NativeButton::DLeft, PadButton::ButtonLeft},
+            {Settings::NativeButton::DUp, PadButton::ButtonUp},
+            {Settings::NativeButton::DRight, PadButton::ButtonRight},
+            {Settings::NativeButton::DDown, PadButton::ButtonDown},
+            {Settings::NativeButton::SL, PadButton::TriggerL},
+            {Settings::NativeButton::SR, PadButton::TriggerR},
+            {Settings::NativeButton::R, PadButton::TriggerZ},
+        };
+    if (!params.Has("port")) {
+        return {};
+    }
+
+    ButtonMapping mapping{};
+    for (const auto& [switch_button, gcadapter_button] : switch_to_gcadapter_button) {
+        Common::ParamPackage button_params{};
+        button_params.Set("engine", GetEngineName());
+        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::tuple<Settings::NativeButton::Values, PadButton, PadAxes>, 2>
+        switch_to_gcadapter_axis = {
+            std::tuple{Settings::NativeButton::ZL, PadButton::TriggerL, PadAxes::TriggerLeft},
+            {Settings::NativeButton::ZR, PadButton::TriggerR, PadAxes::TriggerRight},
+        };
+    for (const auto& [switch_button, gcadapter_buton, gcadapter_axis] : switch_to_gcadapter_axis) {
+        Common::ParamPackage button_params{};
+        button_params.Set("engine", GetEngineName());
+        button_params.Set("port", params.Get("port", 0));
+        button_params.Set("button", static_cast<s32>(gcadapter_buton));
+        button_params.Set("axis", static_cast<s32>(gcadapter_axis));
+        button_params.Set("threshold", 0.5f);
+        button_params.Set("range", 1.9f);
+        button_params.Set("direction", "+");
+        mapping.insert_or_assign(switch_button, std::move(button_params));
+    }
+    return mapping;
+}
+
+AnalogMapping GCAdapter::GetAnalogMappingForDevice(const Common::ParamPackage& params) {
+    if (!params.Has("port")) {
+        return {};
+    }
+
+    AnalogMapping mapping = {};
+    Common::ParamPackage left_analog_params;
+    left_analog_params.Set("engine", GetEngineName());
+    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", GetEngineName());
+    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;
+}
+
+Common::Input::ButtonNames GCAdapter::GetUIButtonName(const Common::ParamPackage& params) const {
+    PadButton button = static_cast<PadButton>(params.Get("button", 0));
+    switch (button) {
+    case PadButton::ButtonLeft:
+        return Common::Input::ButtonNames::ButtonLeft;
+    case PadButton::ButtonRight:
+        return Common::Input::ButtonNames::ButtonRight;
+    case PadButton::ButtonDown:
+        return Common::Input::ButtonNames::ButtonDown;
+    case PadButton::ButtonUp:
+        return Common::Input::ButtonNames::ButtonUp;
+    case PadButton::TriggerZ:
+        return Common::Input::ButtonNames::TriggerZ;
+    case PadButton::TriggerR:
+        return Common::Input::ButtonNames::TriggerR;
+    case PadButton::TriggerL:
+        return Common::Input::ButtonNames::TriggerL;
+    case PadButton::ButtonA:
+        return Common::Input::ButtonNames::ButtonA;
+    case PadButton::ButtonB:
+        return Common::Input::ButtonNames::ButtonB;
+    case PadButton::ButtonX:
+        return Common::Input::ButtonNames::ButtonX;
+    case PadButton::ButtonY:
+        return Common::Input::ButtonNames::ButtonY;
+    case PadButton::ButtonStart:
+        return Common::Input::ButtonNames::ButtonStart;
+    default:
+        return Common::Input::ButtonNames::Undefined;
+    }
+}
+
+Common::Input::ButtonNames GCAdapter::GetUIName(const Common::ParamPackage& params) const {
+    if (params.Has("button")) {
+        return GetUIButtonName(params);
+    }
+    if (params.Has("axis")) {
+        return Common::Input::ButtonNames::Value;
+    }
+
+    return Common::Input::ButtonNames::Invalid;
+}
+
+bool GCAdapter::IsStickInverted(const Common::ParamPackage& params) {
+    if (!params.Has("port")) {
+        return false;
+    }
+
+    const auto x_axis = static_cast<PadAxes>(params.Get("axis_x", 0));
+    const auto y_axis = static_cast<PadAxes>(params.Get("axis_y", 0));
+    if (x_axis != PadAxes::StickY && x_axis != PadAxes::SubstickY) {
+        return false;
+    }
+    if (y_axis != PadAxes::StickX && y_axis != PadAxes::SubstickX) {
+        return false;
+    }
+    return true;
+}
+
+} // namespace InputCommon

src/input_common/drivers/gc_adapter.h

@@ -0,0 +1,137 @@
+// SPDX-FileCopyrightText: 2014 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+#include <memory>
+#include <string>
+#include <thread>
+
+#include "common/polyfill_thread.h"
+#include "input_common/input_engine.h"
+
+struct libusb_context;
+struct libusb_device;
+struct libusb_device_handle;
+
+namespace InputCommon {
+
+class LibUSBContext;
+class LibUSBDeviceHandle;
+
+class GCAdapter : public InputEngine {
+public:
+    explicit GCAdapter(std::string input_engine_);
+    ~GCAdapter() override;
+
+    Common::Input::VibrationError SetVibration(
+        const PadIdentifier& identifier, const Common::Input::VibrationStatus& vibration) override;
+
+    bool IsVibrationEnabled(const PadIdentifier& identifier) override;
+
+    /// Used for automapping features
+    std::vector<Common::ParamPackage> GetInputDevices() const override;
+    ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& params) override;
+    AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& params) override;
+    Common::Input::ButtonNames GetUIName(const Common::ParamPackage& params) const override;
+
+    bool IsStickInverted(const Common::ParamPackage& params) override;
+
+private:
+    enum class PadButton {
+        Undefined = 0x0000,
+        ButtonLeft = 0x0001,
+        ButtonRight = 0x0002,
+        ButtonDown = 0x0004,
+        ButtonUp = 0x0008,
+        TriggerZ = 0x0010,
+        TriggerR = 0x0020,
+        TriggerL = 0x0040,
+        ButtonA = 0x0100,
+        ButtonB = 0x0200,
+        ButtonX = 0x0400,
+        ButtonY = 0x0800,
+        ButtonStart = 0x1000,
+    };
+
+    enum class PadAxes : u8 {
+        StickX,
+        StickY,
+        SubstickX,
+        SubstickY,
+        TriggerLeft,
+        TriggerRight,
+        Undefined,
+    };
+
+    enum class ControllerTypes {
+        None,
+        Wired,
+        Wireless,
+    };
+
+    struct GCController {
+        ControllerTypes type = ControllerTypes::None;
+        PadIdentifier identifier{};
+        bool enable_vibration = false;
+        u8 rumble_amplitude{};
+        std::array<u8, 6> axis_origin{};
+        u8 reset_origin_counter{};
+    };
+
+    using AdapterPayload = std::array<u8, 37>;
+
+    void UpdatePadType(std::size_t port, ControllerTypes pad_type);
+    void UpdateControllers(const AdapterPayload& adapter_payload);
+    void UpdateStateButtons(std::size_t port, u8 b1, u8 b2);
+    void UpdateStateAxes(std::size_t port, const AdapterPayload& adapter_payload);
+
+    void AdapterInputThread(std::stop_token stop_token);
+
+    void AdapterScanThread(std::stop_token stop_token);
+
+    bool IsPayloadCorrect(const AdapterPayload& adapter_payload, s32 payload_size);
+
+    /// For use in initialization, querying devices to find the adapter
+    bool Setup();
+
+    /// Returns true if we successfully gain access to GC Adapter
+    bool CheckDeviceAccess();
+
+    /// Captures GC Adapter endpoint address
+    /// Returns true if the endpoint was set correctly
+    bool GetGCEndpoint(libusb_device* device);
+
+    /// Returns true if there is a device connected to port
+    bool DeviceConnected(std::size_t port) const;
+
+    /// For shutting down, clear all data, join all threads, release usb
+    void Reset();
+
+    void UpdateVibrations();
+
+    /// Updates vibration state of all controllers
+    void SendVibrations();
+
+    Common::Input::ButtonNames GetUIButtonName(const Common::ParamPackage& params) const;
+
+    std::unique_ptr<LibUSBDeviceHandle> usb_adapter_handle;
+    std::array<GCController, 4> pads;
+
+    std::jthread adapter_input_thread;
+    std::jthread adapter_scan_thread;
+    bool restart_scan_thread{};
+
+    std::unique_ptr<LibUSBContext> libusb_ctx;
+
+    u8 input_endpoint{0};
+    u8 output_endpoint{0};
+    u8 input_error_counter{0};
+    u8 output_error_counter{0};
+    int vibration_counter{0};
+
+    bool rumble_enabled{true};
+    bool vibration_changed{true};
+};
+} // namespace InputCommon

src/input_common/drivers/keyboard.cpp

@@ -0,0 +1,40 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/param_package.h"
+#include "input_common/drivers/keyboard.h"
+
+namespace InputCommon {
+
+constexpr PadIdentifier key_identifier = {
+    .guid = Common::UUID{},
+    .port = 0,
+    .pad = 0,
+};
+
+Keyboard::Keyboard(std::string input_engine_) : InputEngine(std::move(input_engine_)) {
+    PreSetController(key_identifier);
+}
+
+void Keyboard::PressKey(int key_code) {
+    SetButton(key_identifier, key_code, true);
+}
+
+void Keyboard::ReleaseKey(int key_code) {
+    SetButton(key_identifier, key_code, false);
+}
+
+void Keyboard::ReleaseAllKeys() {
+    ResetButtonState();
+}
+
+std::vector<Common::ParamPackage> Keyboard::GetInputDevices() const {
+    std::vector<Common::ParamPackage> devices;
+    devices.emplace_back(Common::ParamPackage{
+        {"engine", GetEngineName()},
+        {"display", "Keyboard Only"},
+    });
+    return devices;
+}
+
+} // namespace InputCommon

src/input_common/drivers/keyboard.h

@@ -0,0 +1,37 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "input_common/input_engine.h"
+
+namespace InputCommon {
+
+/**
+ * A button device factory representing a keyboard. It receives keyboard events and forward them
+ * to all button devices it created.
+ */
+class Keyboard final : public InputEngine {
+public:
+    explicit Keyboard(std::string input_engine_);
+
+    /**
+     * Sets the status of all buttons bound with the key to pressed
+     * @param key_code the code of the key to press
+     */
+    void PressKey(int key_code);
+
+    /**
+     * Sets the status of all buttons bound with the key to released
+     * @param key_code the code of the key to release
+     */
+    void ReleaseKey(int key_code);
+
+    /// Sets all keys to the non pressed state
+    void ReleaseAllKeys();
+
+    /// Used for automapping features
+    std::vector<Common::ParamPackage> GetInputDevices() const override;
+};
+
+} // namespace InputCommon

src/input_common/drivers/mouse.cpp

@@ -0,0 +1,148 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <thread>
+#include <fmt/format.h>
+
+#include "common/param_package.h"
+#include "common/settings.h"
+#include "common/thread.h"
+#include "input_common/drivers/mouse.h"
+
+namespace InputCommon {
+constexpr int mouse_axis_x = 0;
+constexpr int mouse_axis_y = 1;
+constexpr int wheel_axis_x = 2;
+constexpr int wheel_axis_y = 3;
+constexpr int motion_wheel_y = 4;
+constexpr int touch_axis_x = 10;
+constexpr int touch_axis_y = 11;
+constexpr PadIdentifier identifier = {
+    .guid = Common::UUID{},
+    .port = 0,
+    .pad = 0,
+};
+
+Mouse::Mouse(std::string input_engine_) : InputEngine(std::move(input_engine_)) {
+    PreSetController(identifier);
+    PreSetAxis(identifier, mouse_axis_x);
+    PreSetAxis(identifier, mouse_axis_y);
+    PreSetAxis(identifier, wheel_axis_x);
+    PreSetAxis(identifier, wheel_axis_y);
+    PreSetAxis(identifier, motion_wheel_y);
+    PreSetAxis(identifier, touch_axis_x);
+    PreSetAxis(identifier, touch_axis_y);
+    update_thread = std::jthread([this](std::stop_token stop_token) { UpdateThread(stop_token); });
+}
+
+void Mouse::UpdateThread(std::stop_token stop_token) {
+    Common::SetCurrentThreadName("Mouse");
+    constexpr int update_time = 10;
+    while (!stop_token.stop_requested()) {
+        SetAxis(identifier, motion_wheel_y, 0.0f);
+        std::this_thread::sleep_for(std::chrono::milliseconds(update_time));
+    }
+}
+
+void Mouse::MouseMove(int x, int y, f32 touch_x, f32 touch_y, int center_x, int center_y) {
+    SetAxis(identifier, touch_axis_x, touch_x);
+    SetAxis(identifier, touch_axis_y, touch_y);
+
+    if (button_pressed) {
+        constexpr float sensitivity = 0.0012f;
+        const auto mouse_move = Common::MakeVec<int>(x, y) - mouse_origin;
+        SetAxis(identifier, mouse_axis_x, static_cast<float>(mouse_move.x) * sensitivity);
+        SetAxis(identifier, mouse_axis_y, static_cast<float>(-mouse_move.y) * sensitivity);
+    }
+}
+
+void Mouse::PressButton(int x, int y, f32 touch_x, f32 touch_y, MouseButton button) {
+    SetAxis(identifier, touch_axis_x, touch_x);
+    SetAxis(identifier, touch_axis_y, touch_y);
+    SetButton(identifier, static_cast<int>(button), true);
+    // Set initial analog parameters
+    mouse_origin = {x, y};
+    last_mouse_position = {x, y};
+    button_pressed = true;
+}
+
+void Mouse::ReleaseButton(MouseButton button) {
+    SetButton(identifier, static_cast<int>(button), false);
+    button_pressed = false;
+}
+
+void Mouse::MouseWheelChange(int x, int y) {
+    wheel_position.x += x;
+    wheel_position.y += y;
+    SetAxis(identifier, wheel_axis_x, static_cast<f32>(wheel_position.x));
+    SetAxis(identifier, wheel_axis_y, static_cast<f32>(wheel_position.y));
+    SetAxis(identifier, motion_wheel_y, static_cast<f32>(y) / 100.0f);
+}
+
+void Mouse::ReleaseAllButtons() {
+    ResetButtonState();
+    button_pressed = false;
+}
+
+std::vector<Common::ParamPackage> Mouse::GetInputDevices() const {
+    std::vector<Common::ParamPackage> devices;
+    devices.emplace_back(Common::ParamPackage{
+        {"engine", GetEngineName()},
+        {"display", "Keyboard/Mouse"},
+    });
+    return devices;
+}
+
+AnalogMapping Mouse::GetAnalogMappingForDevice(
+    [[maybe_unused]] const Common::ParamPackage& params) {
+    // Only overwrite different buttons from default
+    AnalogMapping mapping = {};
+    Common::ParamPackage right_analog_params;
+    right_analog_params.Set("engine", GetEngineName());
+    right_analog_params.Set("axis_x", 0);
+    right_analog_params.Set("axis_y", 1);
+    right_analog_params.Set("threshold", 0.5f);
+    right_analog_params.Set("range", 1.0f);
+    right_analog_params.Set("deadzone", 0.0f);
+    mapping.insert_or_assign(Settings::NativeAnalog::CStick, std::move(right_analog_params));
+    return mapping;
+}
+
+Common::Input::ButtonNames Mouse::GetUIButtonName(const Common::ParamPackage& params) const {
+    const auto button = static_cast<MouseButton>(params.Get("button", 0));
+    switch (button) {
+    case MouseButton::Left:
+        return Common::Input::ButtonNames::ButtonLeft;
+    case MouseButton::Right:
+        return Common::Input::ButtonNames::ButtonRight;
+    case MouseButton::Wheel:
+        return Common::Input::ButtonNames::ButtonMouseWheel;
+    case MouseButton::Backward:
+        return Common::Input::ButtonNames::ButtonBackward;
+    case MouseButton::Forward:
+        return Common::Input::ButtonNames::ButtonForward;
+    case MouseButton::Task:
+        return Common::Input::ButtonNames::ButtonTask;
+    case MouseButton::Extra:
+        return Common::Input::ButtonNames::ButtonExtra;
+    case MouseButton::Undefined:
+    default:
+        return Common::Input::ButtonNames::Undefined;
+    }
+}
+
+Common::Input::ButtonNames Mouse::GetUIName(const Common::ParamPackage& params) const {
+    if (params.Has("button")) {
+        return GetUIButtonName(params);
+    }
+    if (params.Has("axis")) {
+        return Common::Input::ButtonNames::Value;
+    }
+    if (params.Has("axis_x") && params.Has("axis_y") && params.Has("axis_z")) {
+        return Common::Input::ButtonNames::Engine;
+    }
+
+    return Common::Input::ButtonNames::Invalid;
+}
+
+} // namespace InputCommon

src/input_common/drivers/mouse.h

@@ -0,0 +1,79 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <thread>
+
+#include "common/vector_math.h"
+#include "input_common/input_engine.h"
+
+namespace InputCommon {
+
+enum class MouseButton {
+    Left,
+    Right,
+    Wheel,
+    Backward,
+    Forward,
+    Task,
+    Extra,
+    Undefined,
+};
+
+/**
+ * A button device factory representing a keyboard. It receives keyboard events and forward them
+ * to all button devices it created.
+ */
+class Mouse final : public InputEngine {
+public:
+    explicit Mouse(std::string input_engine_);
+
+    /**
+     * Signals that mouse has moved.
+     * @param x the x-coordinate of the cursor
+     * @param y the y-coordinate of the cursor
+     * @param center_x the x-coordinate of the middle of the screen
+     * @param center_y the y-coordinate of the middle of the screen
+     */
+    void MouseMove(int x, int y, f32 touch_x, f32 touch_y, int center_x, int center_y);
+
+    /**
+     * Sets the status of all buttons bound with the key to pressed
+     * @param key_code the code of the key to press
+     */
+    void PressButton(int x, int y, f32 touch_x, f32 touch_y, MouseButton button);
+
+    /**
+     * Sets the status of all buttons bound with the key to released
+     * @param key_code the code of the key to release
+     */
+    void ReleaseButton(MouseButton button);
+
+    /**
+     * Sets the status of the mouse wheel
+     * @param x delta movement in the x direction
+     * @param y delta movement in the y direction
+     */
+    void MouseWheelChange(int x, int y);
+
+    void ReleaseAllButtons();
+
+    std::vector<Common::ParamPackage> GetInputDevices() const override;
+    AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& params) override;
+    Common::Input::ButtonNames GetUIName(const Common::ParamPackage& params) const override;
+
+private:
+    void UpdateThread(std::stop_token stop_token);
+
+    Common::Input::ButtonNames GetUIButtonName(const Common::ParamPackage& params) const;
+
+    Common::Vec2<int> mouse_origin;
+    Common::Vec2<int> last_mouse_position;
+    Common::Vec2<float> last_mouse_change;
+    Common::Vec2<int> wheel_position;
+    bool button_pressed;
+    std::jthread update_thread;
+};
+
+} // namespace InputCommon

src/input_common/drivers/sdl_driver.cpp

@@ -0,0 +1,818 @@
+// SPDX-FileCopyrightText: 2018 Citra Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/logging/log.h"
+#include "common/math_util.h"
+#include "common/param_package.h"
+#include "common/settings.h"
+#include "common/thread.h"
+#include "common/vector_math.h"
+#include "input_common/drivers/sdl_driver.h"
+
+namespace InputCommon {
+
+namespace {
+Common::UUID GetGUID(SDL_Joystick* joystick) {
+    const SDL_JoystickGUID guid = SDL_JoystickGetGUID(joystick);
+    std::array<u8, 16> data{};
+    std::memcpy(data.data(), guid.data, sizeof(data));
+    // Clear controller name crc
+    std::memset(data.data() + 2, 0, sizeof(u16));
+    return Common::UUID{data};
+}
+} // Anonymous namespace
+
+static int SDLEventWatcher(void* user_data, SDL_Event* event) {
+    auto* const sdl_state = static_cast<SDLDriver*>(user_data);
+
+    sdl_state->HandleGameControllerEvent(*event);
+
+    return 0;
+}
+
+class SDLJoystick {
+public:
+    SDLJoystick(Common::UUID guid_, int port_, SDL_Joystick* joystick,
+                SDL_GameController* game_controller)
+        : guid{guid_}, port{port_}, sdl_joystick{joystick, &SDL_JoystickClose},
+          sdl_controller{game_controller, &SDL_GameControllerClose} {
+        EnableMotion();
+    }
+
+    void EnableMotion() {
+        if (sdl_controller) {
+            SDL_GameController* controller = sdl_controller.get();
+            has_accel = SDL_GameControllerHasSensor(controller, SDL_SENSOR_ACCEL) == SDL_TRUE;
+            has_gyro = SDL_GameControllerHasSensor(controller, SDL_SENSOR_GYRO) == SDL_TRUE;
+            if (has_accel) {
+                SDL_GameControllerSetSensorEnabled(controller, SDL_SENSOR_ACCEL, SDL_TRUE);
+            }
+            if (has_gyro) {
+                SDL_GameControllerSetSensorEnabled(controller, SDL_SENSOR_GYRO, SDL_TRUE);
+            }
+        }
+    }
+
+    bool HasGyro() const {
+        return has_gyro;
+    }
+
+    bool HasAccel() const {
+        return has_accel;
+    }
+
+    bool UpdateMotion(SDL_ControllerSensorEvent event) {
+        constexpr float gravity_constant = 9.80665f;
+        std::scoped_lock lock{mutex};
+        const u64 time_difference = event.timestamp - last_motion_update;
+        last_motion_update = event.timestamp;
+        switch (event.sensor) {
+        case SDL_SENSOR_ACCEL: {
+            motion.accel_x = -event.data[0] / gravity_constant;
+            motion.accel_y = event.data[2] / gravity_constant;
+            motion.accel_z = -event.data[1] / gravity_constant;
+            break;
+        }
+        case SDL_SENSOR_GYRO: {
+            motion.gyro_x = event.data[0] / (Common::PI * 2);
+            motion.gyro_y = -event.data[2] / (Common::PI * 2);
+            motion.gyro_z = event.data[1] / (Common::PI * 2);
+            break;
+        }
+        }
+
+        // Ignore duplicated timestamps
+        if (time_difference == 0) {
+            return false;
+        }
+        motion.delta_timestamp = time_difference * 1000;
+        return true;
+    }
+
+    const BasicMotion& GetMotion() const {
+        return motion;
+    }
+
+    /**
+     * The Pad identifier of the joystick
+     */
+    const PadIdentifier GetPadIdentifier() const {
+        return {
+            .guid = guid,
+            .port = static_cast<std::size_t>(port),
+            .pad = 0,
+        };
+    }
+
+    /**
+     * The guid of the joystick
+     */
+    const Common::UUID& GetGUID() const {
+        return guid;
+    }
+
+    /**
+     * The number of joystick from the same type that were connected before this joystick
+     */
+    int GetPort() const {
+        return port;
+    }
+
+    SDL_Joystick* GetSDLJoystick() const {
+        return sdl_joystick.get();
+    }
+
+    SDL_GameController* GetSDLGameController() const {
+        return sdl_controller.get();
+    }
+
+    void SetSDLJoystick(SDL_Joystick* joystick, SDL_GameController* controller) {
+        sdl_joystick.reset(joystick);
+        sdl_controller.reset(controller);
+    }
+
+    std::string GetControllerName() const {
+        if (sdl_controller) {
+            switch (SDL_GameControllerGetType(sdl_controller.get())) {
+            case SDL_CONTROLLER_TYPE_XBOX360:
+                return "Xbox 360 Controller";
+            case SDL_CONTROLLER_TYPE_XBOXONE:
+                return "Xbox One Controller";
+            case SDL_CONTROLLER_TYPE_PS3:
+                return "DualShock 3 Controller";
+            case SDL_CONTROLLER_TYPE_PS4:
+                return "DualShock 4 Controller";
+            case SDL_CONTROLLER_TYPE_PS5:
+                return "DualSense Controller";
+            default:
+                break;
+            }
+            const auto name = SDL_GameControllerName(sdl_controller.get());
+            if (name) {
+                return name;
+            }
+        }
+
+        if (sdl_joystick) {
+            const auto name = SDL_JoystickName(sdl_joystick.get());
+            if (name) {
+                return name;
+            }
+        }
+
+        return "Unknown";
+    }
+
+private:
+    Common::UUID guid;
+    int port;
+    std::unique_ptr<SDL_Joystick, decltype(&SDL_JoystickClose)> sdl_joystick;
+    std::unique_ptr<SDL_GameController, decltype(&SDL_GameControllerClose)> sdl_controller;
+    mutable std::mutex mutex;
+
+    u64 last_motion_update{};
+    bool has_gyro{false};
+    bool has_accel{false};
+    BasicMotion motion;
+};
+
+std::shared_ptr<SDLJoystick> SDLDriver::GetSDLJoystickByGUID(const Common::UUID& guid, int port) {
+    std::scoped_lock lock{joystick_map_mutex};
+    const auto it = joystick_map.find(guid);
+
+    if (it != joystick_map.end()) {
+        while (it->second.size() <= static_cast<std::size_t>(port)) {
+            auto joystick = std::make_shared<SDLJoystick>(guid, static_cast<int>(it->second.size()),
+                                                          nullptr, nullptr);
+            it->second.emplace_back(std::move(joystick));
+        }
+
+        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));
+}
+
+std::shared_ptr<SDLJoystick> SDLDriver::GetSDLJoystickByGUID(const std::string& guid, int port) {
+    return GetSDLJoystickByGUID(Common::UUID{guid}, port);
+}
+
+std::shared_ptr<SDLJoystick> SDLDriver::GetSDLJoystickBySDLID(SDL_JoystickID sdl_id) {
+    auto sdl_joystick = SDL_JoystickFromInstanceID(sdl_id);
+    const auto guid = GetGUID(sdl_joystick);
+
+    std::scoped_lock lock{joystick_map_mutex};
+    const auto map_it = joystick_map.find(guid);
+
+    if (map_it == joystick_map.end()) {
+        return nullptr;
+    }
+
+    const auto vec_it = std::find_if(map_it->second.begin(), map_it->second.end(),
+                                     [&sdl_joystick](const auto& joystick) {
+                                         return joystick->GetSDLJoystick() == sdl_joystick;
+                                     });
+
+    if (vec_it == map_it->second.end()) {
+        return nullptr;
+    }
+
+    return *vec_it;
+}
+
+void SDLDriver::InitJoystick(int joystick_index) {
+    SDL_Joystick* sdl_joystick = SDL_JoystickOpen(joystick_index);
+    SDL_GameController* sdl_gamecontroller = nullptr;
+
+    if (SDL_IsGameController(joystick_index)) {
+        sdl_gamecontroller = SDL_GameControllerOpen(joystick_index);
+    }
+
+    if (!sdl_joystick) {
+        LOG_ERROR(Input, "Failed to open joystick {}", joystick_index);
+        return;
+    }
+
+    const auto guid = GetGUID(sdl_joystick);
+
+    std::scoped_lock lock{joystick_map_mutex};
+    if (joystick_map.find(guid) == joystick_map.end()) {
+        auto joystick = std::make_shared<SDLJoystick>(guid, 0, sdl_joystick, sdl_gamecontroller);
+        PreSetController(joystick->GetPadIdentifier());
+        joystick->EnableMotion();
+        joystick_map[guid].emplace_back(std::move(joystick));
+        return;
+    }
+
+    auto& joystick_guid_list = joystick_map[guid];
+    const auto joystick_it =
+        std::find_if(joystick_guid_list.begin(), joystick_guid_list.end(),
+                     [](const auto& joystick) { return !joystick->GetSDLJoystick(); });
+
+    if (joystick_it != joystick_guid_list.end()) {
+        (*joystick_it)->SetSDLJoystick(sdl_joystick, sdl_gamecontroller);
+        (*joystick_it)->EnableMotion();
+        return;
+    }
+
+    const int port = static_cast<int>(joystick_guid_list.size());
+    auto joystick = std::make_shared<SDLJoystick>(guid, port, sdl_joystick, sdl_gamecontroller);
+    PreSetController(joystick->GetPadIdentifier());
+    joystick->EnableMotion();
+    joystick_guid_list.emplace_back(std::move(joystick));
+}
+
+void SDLDriver::CloseJoystick(SDL_Joystick* sdl_joystick) {
+    const auto guid = GetGUID(sdl_joystick);
+
+    std::scoped_lock 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 auto& joystick) {
+                                              return joystick->GetSDLJoystick() == sdl_joystick;
+                                          });
+
+    if (joystick_it != joystick_guid_list.end()) {
+        (*joystick_it)->SetSDLJoystick(nullptr, nullptr);
+    }
+}
+
+void SDLDriver::PumpEvents() const {
+    if (initialized) {
+        SDL_PumpEvents();
+    }
+}
+
+void SDLDriver::HandleGameControllerEvent(const SDL_Event& event) {
+    switch (event.type) {
+    case SDL_JOYBUTTONUP: {
+        if (const auto joystick = GetSDLJoystickBySDLID(event.jbutton.which)) {
+            const PadIdentifier identifier = joystick->GetPadIdentifier();
+            SetButton(identifier, event.jbutton.button, false);
+        }
+        break;
+    }
+    case SDL_JOYBUTTONDOWN: {
+        if (const auto joystick = GetSDLJoystickBySDLID(event.jbutton.which)) {
+            const PadIdentifier identifier = joystick->GetPadIdentifier();
+            SetButton(identifier, event.jbutton.button, true);
+        }
+        break;
+    }
+    case SDL_JOYHATMOTION: {
+        if (const auto joystick = GetSDLJoystickBySDLID(event.jhat.which)) {
+            const PadIdentifier identifier = joystick->GetPadIdentifier();
+            SetHatButton(identifier, event.jhat.hat, event.jhat.value);
+        }
+        break;
+    }
+    case SDL_JOYAXISMOTION: {
+        if (const auto joystick = GetSDLJoystickBySDLID(event.jaxis.which)) {
+            const PadIdentifier identifier = joystick->GetPadIdentifier();
+            SetAxis(identifier, event.jaxis.axis, event.jaxis.value / 32767.0f);
+        }
+        break;
+    }
+    case SDL_CONTROLLERSENSORUPDATE: {
+        if (auto joystick = GetSDLJoystickBySDLID(event.csensor.which)) {
+            if (joystick->UpdateMotion(event.csensor)) {
+                const PadIdentifier identifier = joystick->GetPadIdentifier();
+                SetMotion(identifier, 0, joystick->GetMotion());
+            }
+        }
+        break;
+    }
+    case SDL_JOYDEVICEREMOVED:
+        LOG_DEBUG(Input, "Controller removed with Instance_ID {}", event.jdevice.which);
+        CloseJoystick(SDL_JoystickFromInstanceID(event.jdevice.which));
+        break;
+    case SDL_JOYDEVICEADDED:
+        LOG_DEBUG(Input, "Controller connected with device index {}", event.jdevice.which);
+        InitJoystick(event.jdevice.which);
+        break;
+    }
+}
+
+void SDLDriver::CloseJoysticks() {
+    std::scoped_lock lock{joystick_map_mutex};
+    joystick_map.clear();
+}
+
+SDLDriver::SDLDriver(std::string input_engine_) : InputEngine(std::move(input_engine_)) {
+    // Prevent SDL from adding undesired axis
+    SDL_SetHint(SDL_HINT_ACCELEROMETER_AS_JOYSTICK, "0");
+
+    // Enable HIDAPI rumble. This prevents SDL from disabling motion on PS4 and PS5 controllers
+    SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_PS4_RUMBLE, "1");
+    SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_PS5_RUMBLE, "1");
+    SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1");
+
+    // Use hidapi driver for joycons. This will allow joycons to be detected as a GameController and
+    // not a generic one
+    SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_JOY_CONS, "1");
+
+    // Disable hidapi driver for xbox. Already default on Windows, this causes conflict with native
+    // driver on Linux.
+    SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_XBOX, "0");
+
+    // If the frontend is going to manage the event loop, then we don't start one here
+    start_thread = SDL_WasInit(SDL_INIT_JOYSTICK | SDL_INIT_GAMECONTROLLER) == 0;
+    if (start_thread && SDL_Init(SDL_INIT_JOYSTICK | SDL_INIT_GAMECONTROLLER) < 0) {
+        LOG_CRITICAL(Input, "SDL_Init failed with: {}", SDL_GetError());
+        return;
+    }
+
+    SDL_AddEventWatch(&SDLEventWatcher, this);
+
+    initialized = true;
+    // Because the events for joystick connection happens before we have our event watcher added, we
+    // can just open all the joysticks right here
+    for (int i = 0; i < SDL_NumJoysticks(); ++i) {
+        InitJoystick(i);
+    }
+}
+
+SDLDriver::~SDLDriver() {
+    CloseJoysticks();
+    SDL_DelEventWatch(&SDLEventWatcher, this);
+
+    initialized = false;
+    if (start_thread) {
+        SDL_QuitSubSystem(SDL_INIT_JOYSTICK | SDL_INIT_GAMECONTROLLER);
+    }
+}
+
+std::vector<Common::ParamPackage> SDLDriver::GetInputDevices() const {
+    std::vector<Common::ParamPackage> devices;
+    std::unordered_map<int, std::shared_ptr<SDLJoystick>> joycon_pairs;
+    for (const auto& [key, value] : joystick_map) {
+        for (const auto& joystick : value) {
+            if (!joystick->GetSDLJoystick()) {
+                continue;
+            }
+            const std::string name =
+                fmt::format("{} {}", joystick->GetControllerName(), joystick->GetPort());
+            devices.emplace_back(Common::ParamPackage{
+                {"engine", GetEngineName()},
+                {"display", std::move(name)},
+                {"guid", joystick->GetGUID().RawString()},
+                {"port", std::to_string(joystick->GetPort())},
+            });
+        }
+    }
+
+    return devices;
+}
+
+Common::ParamPackage SDLDriver::BuildAnalogParamPackageForButton(int port, const Common::UUID& guid,
+                                                                 s32 axis, float value) const {
+    Common::ParamPackage params{};
+    params.Set("engine", GetEngineName());
+    params.Set("port", port);
+    params.Set("guid", guid.RawString());
+    params.Set("axis", axis);
+    params.Set("threshold", "0.5");
+    params.Set("invert", value < 0 ? "-" : "+");
+    return params;
+}
+
+Common::ParamPackage SDLDriver::BuildButtonParamPackageForButton(int port, const Common::UUID& guid,
+                                                                 s32 button) const {
+    Common::ParamPackage params{};
+    params.Set("engine", GetEngineName());
+    params.Set("port", port);
+    params.Set("guid", guid.RawString());
+    params.Set("button", button);
+    return params;
+}
+
+Common::ParamPackage SDLDriver::BuildHatParamPackageForButton(int port, const Common::UUID& guid,
+                                                              s32 hat, u8 value) const {
+    Common::ParamPackage params{};
+    params.Set("engine", GetEngineName());
+    params.Set("port", port);
+    params.Set("guid", guid.RawString());
+    params.Set("hat", hat);
+    params.Set("direction", GetHatButtonName(value));
+    return params;
+}
+
+Common::ParamPackage SDLDriver::BuildMotionParam(int port, const Common::UUID& guid) const {
+    Common::ParamPackage params{};
+    params.Set("engine", GetEngineName());
+    params.Set("motion", 0);
+    params.Set("port", port);
+    params.Set("guid", guid.RawString());
+    return params;
+}
+
+Common::ParamPackage SDLDriver::BuildParamPackageForBinding(
+    int port, const Common::UUID& guid, const SDL_GameControllerButtonBind& binding) const {
+    switch (binding.bindType) {
+    case SDL_CONTROLLER_BINDTYPE_NONE:
+        break;
+    case SDL_CONTROLLER_BINDTYPE_AXIS:
+        return BuildAnalogParamPackageForButton(port, guid, binding.value.axis);
+    case SDL_CONTROLLER_BINDTYPE_BUTTON:
+        return BuildButtonParamPackageForButton(port, guid, binding.value.button);
+    case SDL_CONTROLLER_BINDTYPE_HAT:
+        return BuildHatParamPackageForButton(port, guid, binding.value.hat.hat,
+                                             static_cast<u8>(binding.value.hat.hat_mask));
+    }
+    return {};
+}
+
+Common::ParamPackage SDLDriver::BuildParamPackageForAnalog(PadIdentifier identifier, int axis_x,
+                                                           int axis_y, float offset_x,
+                                                           float offset_y) const {
+    Common::ParamPackage params;
+    params.Set("engine", GetEngineName());
+    params.Set("port", static_cast<int>(identifier.port));
+    params.Set("guid", identifier.guid.RawString());
+    params.Set("axis_x", axis_x);
+    params.Set("axis_y", axis_y);
+    params.Set("offset_x", offset_x);
+    params.Set("offset_y", offset_y);
+    params.Set("invert_x", "+");
+    params.Set("invert_y", "+");
+    return params;
+}
+
+ButtonMapping SDLDriver::GetButtonMappingForDevice(const Common::ParamPackage& params) {
+    if (!params.Has("guid") || !params.Has("port")) {
+        return {};
+    }
+    const auto joystick = GetSDLJoystickByGUID(params.Get("guid", ""), params.Get("port", 0));
+
+    auto* controller = joystick->GetSDLGameController();
+    if (controller == nullptr) {
+        return {};
+    }
+
+    // This list is missing ZL/ZR since those are not considered buttons in SDL GameController.
+    // We will add those afterwards
+    // This list also excludes Screenshot since theres not really a mapping for that
+    ButtonBindings switch_to_sdl_button;
+
+    if (SDL_GameControllerGetType(controller) == SDL_CONTROLLER_TYPE_NINTENDO_SWITCH_PRO) {
+        switch_to_sdl_button = GetNintendoButtonBinding(joystick);
+    } else {
+        switch_to_sdl_button = GetDefaultButtonBinding();
+    }
+
+    // Add the missing bindings for ZL/ZR
+    static constexpr ZButtonBindings switch_to_sdl_axis{{
+        {Settings::NativeButton::ZL, SDL_CONTROLLER_AXIS_TRIGGERLEFT},
+        {Settings::NativeButton::ZR, SDL_CONTROLLER_AXIS_TRIGGERRIGHT},
+    }};
+
+    // Parameters contain two joysticks return dual
+    if (params.Has("guid2")) {
+        const auto joystick2 = GetSDLJoystickByGUID(params.Get("guid2", ""), params.Get("port", 0));
+
+        if (joystick2->GetSDLGameController() != nullptr) {
+            return GetDualControllerMapping(joystick, joystick2, switch_to_sdl_button,
+                                            switch_to_sdl_axis);
+        }
+    }
+
+    return GetSingleControllerMapping(joystick, switch_to_sdl_button, switch_to_sdl_axis);
+}
+
+ButtonBindings SDLDriver::GetDefaultButtonBinding() const {
+    return {
+        std::pair{Settings::NativeButton::A, SDL_CONTROLLER_BUTTON_B},
+        {Settings::NativeButton::B, SDL_CONTROLLER_BUTTON_A},
+        {Settings::NativeButton::X, SDL_CONTROLLER_BUTTON_Y},
+        {Settings::NativeButton::Y, SDL_CONTROLLER_BUTTON_X},
+        {Settings::NativeButton::L, SDL_CONTROLLER_BUTTON_LEFTSHOULDER},
+        {Settings::NativeButton::R, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER},
+        {Settings::NativeButton::Start, SDL_CONTROLLER_BUTTON_START},
+        {Settings::NativeButton::Select, SDL_CONTROLLER_BUTTON_BACK},
+        {Settings::NativeButton::DLeft, SDL_CONTROLLER_BUTTON_DPAD_LEFT},
+        {Settings::NativeButton::DUp, SDL_CONTROLLER_BUTTON_DPAD_UP},
+        {Settings::NativeButton::DRight, SDL_CONTROLLER_BUTTON_DPAD_RIGHT},
+        {Settings::NativeButton::DDown, SDL_CONTROLLER_BUTTON_DPAD_DOWN},
+        {Settings::NativeButton::ZL, SDL_CONTROLLER_BUTTON_LEFTSHOULDER},
+        {Settings::NativeButton::ZR, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER},
+        {Settings::NativeButton::Home, SDL_CONTROLLER_BUTTON_GUIDE},
+    };
+}
+
+ButtonBindings SDLDriver::GetNintendoButtonBinding(
+    const std::shared_ptr<SDLJoystick>& joystick) const {
+    return {
+        std::pair{Settings::NativeButton::A, SDL_CONTROLLER_BUTTON_A},
+        {Settings::NativeButton::B, SDL_CONTROLLER_BUTTON_B},
+        {Settings::NativeButton::X, SDL_CONTROLLER_BUTTON_X},
+        {Settings::NativeButton::Y, SDL_CONTROLLER_BUTTON_Y},
+        {Settings::NativeButton::L, SDL_CONTROLLER_BUTTON_LEFTSHOULDER},
+        {Settings::NativeButton::R, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER},
+        {Settings::NativeButton::Start, SDL_CONTROLLER_BUTTON_START},
+        {Settings::NativeButton::Select, SDL_CONTROLLER_BUTTON_BACK},
+        {Settings::NativeButton::DLeft, SDL_CONTROLLER_BUTTON_DPAD_LEFT},
+        {Settings::NativeButton::DUp, SDL_CONTROLLER_BUTTON_DPAD_UP},
+        {Settings::NativeButton::DRight, SDL_CONTROLLER_BUTTON_DPAD_RIGHT},
+        {Settings::NativeButton::DDown, SDL_CONTROLLER_BUTTON_DPAD_DOWN},
+        {Settings::NativeButton::ZL, SDL_CONTROLLER_BUTTON_LEFTSHOULDER},
+        {Settings::NativeButton::ZR, SDL_CONTROLLER_BUTTON_RIGHTSHOULDER},
+        {Settings::NativeButton::Home, SDL_CONTROLLER_BUTTON_GUIDE},
+    };
+}
+
+ButtonMapping SDLDriver::GetSingleControllerMapping(
+    const std::shared_ptr<SDLJoystick>& joystick, const ButtonBindings& switch_to_sdl_button,
+    const ZButtonBindings& switch_to_sdl_axis) const {
+    ButtonMapping mapping;
+    mapping.reserve(switch_to_sdl_button.size() + switch_to_sdl_axis.size());
+    auto* controller = joystick->GetSDLGameController();
+
+    for (const auto& [switch_button, sdl_button] : switch_to_sdl_button) {
+        const auto& binding = SDL_GameControllerGetBindForButton(controller, sdl_button);
+        mapping.insert_or_assign(
+            switch_button,
+            BuildParamPackageForBinding(joystick->GetPort(), joystick->GetGUID(), binding));
+    }
+    for (const auto& [switch_button, sdl_axis] : switch_to_sdl_axis) {
+        const auto& binding = SDL_GameControllerGetBindForAxis(controller, sdl_axis);
+        mapping.insert_or_assign(
+            switch_button,
+            BuildParamPackageForBinding(joystick->GetPort(), joystick->GetGUID(), binding));
+    }
+
+    return mapping;
+}
+
+ButtonMapping SDLDriver::GetDualControllerMapping(const std::shared_ptr<SDLJoystick>& joystick,
+                                                  const std::shared_ptr<SDLJoystick>& joystick2,
+                                                  const ButtonBindings& switch_to_sdl_button,
+                                                  const ZButtonBindings& switch_to_sdl_axis) const {
+    ButtonMapping mapping;
+    mapping.reserve(switch_to_sdl_button.size() + switch_to_sdl_axis.size());
+    auto* controller = joystick->GetSDLGameController();
+    auto* controller2 = joystick2->GetSDLGameController();
+
+    for (const auto& [switch_button, sdl_button] : switch_to_sdl_button) {
+        if (IsButtonOnLeftSide(switch_button)) {
+            const auto& binding = SDL_GameControllerGetBindForButton(controller2, sdl_button);
+            mapping.insert_or_assign(
+                switch_button,
+                BuildParamPackageForBinding(joystick2->GetPort(), joystick2->GetGUID(), binding));
+            continue;
+        }
+        const auto& binding = SDL_GameControllerGetBindForButton(controller, sdl_button);
+        mapping.insert_or_assign(
+            switch_button,
+            BuildParamPackageForBinding(joystick->GetPort(), joystick->GetGUID(), binding));
+    }
+    for (const auto& [switch_button, sdl_axis] : switch_to_sdl_axis) {
+        if (IsButtonOnLeftSide(switch_button)) {
+            const auto& binding = SDL_GameControllerGetBindForAxis(controller2, sdl_axis);
+            mapping.insert_or_assign(
+                switch_button,
+                BuildParamPackageForBinding(joystick2->GetPort(), joystick2->GetGUID(), binding));
+            continue;
+        }
+        const auto& binding = SDL_GameControllerGetBindForAxis(controller, sdl_axis);
+        mapping.insert_or_assign(
+            switch_button,
+            BuildParamPackageForBinding(joystick->GetPort(), joystick->GetGUID(), binding));
+    }
+
+    return mapping;
+}
+
+bool SDLDriver::IsButtonOnLeftSide(Settings::NativeButton::Values button) const {
+    switch (button) {
+    case Settings::NativeButton::DDown:
+    case Settings::NativeButton::DLeft:
+    case Settings::NativeButton::DRight:
+    case Settings::NativeButton::DUp:
+    case Settings::NativeButton::L:
+    case Settings::NativeButton::Start:
+    case Settings::NativeButton::ZL:
+        return true;
+    default:
+        return false;
+    }
+}
+
+AnalogMapping SDLDriver::GetAnalogMappingForDevice(const Common::ParamPackage& params) {
+    if (!params.Has("guid") || !params.Has("port")) {
+        return {};
+    }
+    const auto joystick = GetSDLJoystickByGUID(params.Get("guid", ""), params.Get("port", 0));
+    const auto joystick2 = GetSDLJoystickByGUID(params.Get("guid2", ""), params.Get("port", 0));
+    auto* controller = joystick->GetSDLGameController();
+    if (controller == nullptr) {
+        return {};
+    }
+
+    AnalogMapping mapping = {};
+    const auto& binding_left_x =
+        SDL_GameControllerGetBindForAxis(controller, SDL_CONTROLLER_AXIS_LEFTX);
+    const auto& binding_left_y =
+        SDL_GameControllerGetBindForAxis(controller, SDL_CONTROLLER_AXIS_LEFTY);
+    if (params.Has("guid2")) {
+        const auto identifier = joystick2->GetPadIdentifier();
+        PreSetController(identifier);
+        PreSetAxis(identifier, binding_left_x.value.axis);
+        PreSetAxis(identifier, binding_left_y.value.axis);
+        const auto left_offset_x = -GetAxis(identifier, binding_left_x.value.axis);
+        const auto left_offset_y = GetAxis(identifier, binding_left_y.value.axis);
+        mapping.insert_or_assign(Settings::NativeAnalog::CirclePad,
+                                 BuildParamPackageForAnalog(identifier, binding_left_x.value.axis,
+                                                            binding_left_y.value.axis,
+                                                            left_offset_x, left_offset_y));
+    } else {
+        const auto identifier = joystick->GetPadIdentifier();
+        PreSetController(identifier);
+        PreSetAxis(identifier, binding_left_x.value.axis);
+        PreSetAxis(identifier, binding_left_y.value.axis);
+        const auto left_offset_x = -GetAxis(identifier, binding_left_x.value.axis);
+        const auto left_offset_y = GetAxis(identifier, binding_left_y.value.axis);
+        mapping.insert_or_assign(Settings::NativeAnalog::CirclePad,
+                                 BuildParamPackageForAnalog(identifier, binding_left_x.value.axis,
+                                                            binding_left_y.value.axis,
+                                                            left_offset_x, left_offset_y));
+    }
+    const auto& binding_right_x =
+        SDL_GameControllerGetBindForAxis(controller, SDL_CONTROLLER_AXIS_RIGHTX);
+    const auto& binding_right_y =
+        SDL_GameControllerGetBindForAxis(controller, SDL_CONTROLLER_AXIS_RIGHTY);
+    const auto identifier = joystick->GetPadIdentifier();
+    PreSetController(identifier);
+    PreSetAxis(identifier, binding_right_x.value.axis);
+    PreSetAxis(identifier, binding_right_y.value.axis);
+    const auto right_offset_x = -GetAxis(identifier, binding_right_x.value.axis);
+    const auto right_offset_y = GetAxis(identifier, binding_right_y.value.axis);
+    mapping.insert_or_assign(Settings::NativeAnalog::CStick,
+                             BuildParamPackageForAnalog(identifier, binding_right_x.value.axis,
+                                                        binding_right_y.value.axis, right_offset_x,
+                                                        right_offset_y));
+    return mapping;
+}
+
+MotionMapping SDLDriver::GetMotionMappingForDevice(const Common::ParamPackage& params) {
+    if (!params.Has("guid") || !params.Has("port")) {
+        return {};
+    }
+    const auto joystick = GetSDLJoystickByGUID(params.Get("guid", ""), params.Get("port", 0));
+    const auto joystick2 = GetSDLJoystickByGUID(params.Get("guid2", ""), params.Get("port", 0));
+    auto* controller = joystick->GetSDLGameController();
+    if (controller == nullptr) {
+        return {};
+    }
+
+    MotionMapping mapping = {};
+    joystick->EnableMotion();
+
+    if (joystick->HasGyro() || joystick->HasAccel()) {
+        mapping.insert_or_assign(Settings::NativeMotion::MotionRight,
+                                 BuildMotionParam(joystick->GetPort(), joystick->GetGUID()));
+    }
+    if (params.Has("guid2")) {
+        joystick2->EnableMotion();
+        if (joystick2->HasGyro() || joystick2->HasAccel()) {
+            mapping.insert_or_assign(Settings::NativeMotion::MotionLeft,
+                                     BuildMotionParam(joystick2->GetPort(), joystick2->GetGUID()));
+        }
+    } else {
+        if (joystick->HasGyro() || joystick->HasAccel()) {
+            mapping.insert_or_assign(Settings::NativeMotion::MotionLeft,
+                                     BuildMotionParam(joystick->GetPort(), joystick->GetGUID()));
+        }
+    }
+
+    return mapping;
+}
+
+Common::Input::ButtonNames SDLDriver::GetUIName(const Common::ParamPackage& params) const {
+    if (params.Has("button")) {
+        // TODO(German77): Find how to substitue the values for real button names
+        return Common::Input::ButtonNames::Value;
+    }
+    if (params.Has("hat")) {
+        return Common::Input::ButtonNames::Value;
+    }
+    if (params.Has("axis")) {
+        return Common::Input::ButtonNames::Value;
+    }
+    if (params.Has("axis_x") && params.Has("axis_y") && params.Has("axis_z")) {
+        return Common::Input::ButtonNames::Value;
+    }
+    if (params.Has("motion")) {
+        return Common::Input::ButtonNames::Engine;
+    }
+
+    return Common::Input::ButtonNames::Invalid;
+}
+
+std::string SDLDriver::GetHatButtonName(u8 direction_value) const {
+    switch (direction_value) {
+    case SDL_HAT_UP:
+        return "up";
+    case SDL_HAT_DOWN:
+        return "down";
+    case SDL_HAT_LEFT:
+        return "left";
+    case SDL_HAT_RIGHT:
+        return "right";
+    default:
+        return {};
+    }
+}
+
+u8 SDLDriver::GetHatButtonId(const std::string& direction_name) const {
+    Uint8 direction;
+    if (direction_name == "up") {
+        direction = SDL_HAT_UP;
+    } else if (direction_name == "down") {
+        direction = SDL_HAT_DOWN;
+    } else if (direction_name == "left") {
+        direction = SDL_HAT_LEFT;
+    } else if (direction_name == "right") {
+        direction = SDL_HAT_RIGHT;
+    } else {
+        direction = 0;
+    }
+    return direction;
+}
+
+bool SDLDriver::IsStickInverted(const Common::ParamPackage& params) {
+    if (!params.Has("guid") || !params.Has("port")) {
+        return false;
+    }
+    const auto joystick = GetSDLJoystickByGUID(params.Get("guid", ""), params.Get("port", 0));
+    if (joystick == nullptr) {
+        return false;
+    }
+    auto* controller = joystick->GetSDLGameController();
+    if (controller == nullptr) {
+        return false;
+    }
+
+    const auto& axis_x = params.Get("axis_x", 0);
+    const auto& axis_y = params.Get("axis_y", 0);
+    const auto& binding_left_x =
+        SDL_GameControllerGetBindForAxis(controller, SDL_CONTROLLER_AXIS_LEFTX);
+    const auto& binding_right_x =
+        SDL_GameControllerGetBindForAxis(controller, SDL_CONTROLLER_AXIS_RIGHTX);
+    const auto& binding_left_y =
+        SDL_GameControllerGetBindForAxis(controller, SDL_CONTROLLER_AXIS_LEFTY);
+    const auto& binding_right_y =
+        SDL_GameControllerGetBindForAxis(controller, SDL_CONTROLLER_AXIS_RIGHTY);
+
+    if (axis_x != binding_left_y.value.axis && axis_x != binding_right_y.value.axis) {
+        return false;
+    }
+    if (axis_y != binding_left_x.value.axis && axis_y != binding_right_x.value.axis) {
+        return false;
+    }
+    return true;
+}
+
+} // namespace InputCommon

src/input_common/drivers/sdl_driver.h

@@ -0,0 +1,117 @@
+// SPDX-FileCopyrightText: 2018 Citra Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <atomic>
+#include <mutex>
+#include <thread>
+#include <unordered_map>
+
+#include <SDL.h>
+
+#include "common/common_types.h"
+#include "common/threadsafe_queue.h"
+#include "input_common/input_engine.h"
+
+union SDL_Event;
+using SDL_GameController = struct _SDL_GameController;
+using SDL_Joystick = struct _SDL_Joystick;
+using SDL_JoystickID = s32;
+
+namespace InputCommon {
+
+class SDLJoystick;
+
+using ButtonBindings =
+    std::array<std::pair<Settings::NativeButton::Values, SDL_GameControllerButton>, 18>;
+using ZButtonBindings =
+    std::array<std::pair<Settings::NativeButton::Values, SDL_GameControllerAxis>, 2>;
+
+class SDLDriver : public InputEngine {
+public:
+    /// Initializes and registers SDL device factories
+    explicit SDLDriver(std::string input_engine_);
+
+    /// Unregisters SDL device factories and shut them down.
+    ~SDLDriver() override;
+
+    void PumpEvents() const;
+
+    /// Handle SDL_Events for joysticks from SDL_PollEvent
+    void HandleGameControllerEvent(const SDL_Event& event);
+
+    /// Get the nth joystick with the corresponding GUID
+    std::shared_ptr<SDLJoystick> GetSDLJoystickBySDLID(SDL_JoystickID sdl_id);
+
+    /**
+     * Check how many identical joysticks (by guid) were connected before the one with sdl_id and so
+     * tie it to a SDLJoystick with the same guid and that port
+     */
+    std::shared_ptr<SDLJoystick> GetSDLJoystickByGUID(const Common::UUID& guid, int port);
+    std::shared_ptr<SDLJoystick> GetSDLJoystickByGUID(const std::string& guid, int port);
+
+    std::vector<Common::ParamPackage> GetInputDevices() const override;
+
+    ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& params) override;
+    AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& params) override;
+    MotionMapping GetMotionMappingForDevice(const Common::ParamPackage& params) override;
+    Common::Input::ButtonNames GetUIName(const Common::ParamPackage& params) const override;
+
+    std::string GetHatButtonName(u8 direction_value) const override;
+    u8 GetHatButtonId(const std::string& direction_name) const override;
+
+    bool IsStickInverted(const Common::ParamPackage& params) override;
+
+private:
+    void InitJoystick(int joystick_index);
+    void CloseJoystick(SDL_Joystick* sdl_joystick);
+
+    /// Needs to be called before SDL_QuitSubSystem.
+    void CloseJoysticks();
+
+    Common::ParamPackage BuildAnalogParamPackageForButton(int port, const Common::UUID& guid,
+                                                          s32 axis, float value = 0.1f) const;
+    Common::ParamPackage BuildButtonParamPackageForButton(int port, const Common::UUID& guid,
+                                                          s32 button) const;
+
+    Common::ParamPackage BuildHatParamPackageForButton(int port, const Common::UUID& guid, s32 hat,
+                                                       u8 value) const;
+
+    Common::ParamPackage BuildMotionParam(int port, const Common::UUID& guid) const;
+
+    Common::ParamPackage BuildParamPackageForBinding(
+        int port, const Common::UUID& guid, const SDL_GameControllerButtonBind& binding) const;
+
+    Common::ParamPackage BuildParamPackageForAnalog(PadIdentifier identifier, int axis_x,
+                                                    int axis_y, float offset_x,
+                                                    float offset_y) const;
+
+    /// Returns the default button bindings list for generic controllers
+    ButtonBindings GetDefaultButtonBinding() const;
+
+    /// Returns the default button bindings list for nintendo controllers
+    ButtonBindings GetNintendoButtonBinding(const std::shared_ptr<SDLJoystick>& joystick) const;
+
+    /// Returns the button mappings from a single controller
+    ButtonMapping GetSingleControllerMapping(const std::shared_ptr<SDLJoystick>& joystick,
+                                             const ButtonBindings& switch_to_sdl_button,
+                                             const ZButtonBindings& switch_to_sdl_axis) const;
+
+    /// Returns the button mappings from two different controllers
+    ButtonMapping GetDualControllerMapping(const std::shared_ptr<SDLJoystick>& joystick,
+                                           const std::shared_ptr<SDLJoystick>& joystick2,
+                                           const ButtonBindings& switch_to_sdl_button,
+                                           const ZButtonBindings& switch_to_sdl_axis) const;
+
+    /// Returns true if the button is on the left joycon
+    bool IsButtonOnLeftSide(Settings::NativeButton::Values button) const;
+
+    /// Map of GUID of a list of corresponding virtual Joysticks
+    std::unordered_map<Common::UUID, std::vector<std::shared_ptr<SDLJoystick>>> joystick_map;
+    std::mutex joystick_map_mutex;
+
+    bool start_thread = false;
+    std::atomic<bool> initialized = false;
+};
+} // namespace InputCommon

src/input_common/drivers/touch_screen.cpp

@@ -0,0 +1,107 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/param_package.h"
+#include "input_common/drivers/touch_screen.h"
+
+namespace InputCommon {
+
+constexpr PadIdentifier identifier = {
+    .guid = Common::UUID{},
+    .port = 0,
+    .pad = 0,
+};
+
+TouchScreen::TouchScreen(std::string input_engine_) : InputEngine(std::move(input_engine_)) {
+    PreSetController(identifier);
+    ReleaseAllTouch();
+}
+
+void TouchScreen::TouchMoved(float x, float y, std::size_t finger_id) {
+    const auto index = GetIndexFromFingerId(finger_id);
+    if (!index) {
+        // Touch doesn't exist handle it as a new one
+        TouchPressed(x, y, finger_id);
+        return;
+    }
+    const auto i = index.value();
+    fingers[i].is_active = true;
+    SetButton(identifier, static_cast<int>(i), true);
+    SetAxis(identifier, static_cast<int>(i * 2), x);
+    SetAxis(identifier, static_cast<int>(i * 2 + 1), y);
+}
+
+void TouchScreen::TouchPressed(float x, float y, std::size_t finger_id) {
+    if (GetIndexFromFingerId(finger_id)) {
+        // Touch already exist. Just update the data
+        TouchMoved(x, y, finger_id);
+        return;
+    }
+    const auto index = GetNextFreeIndex();
+    if (!index) {
+        // No free entries. Ignore input
+        return;
+    }
+    const auto i = index.value();
+    fingers[i].is_enabled = true;
+    fingers[i].finger_id = finger_id;
+    TouchMoved(x, y, finger_id);
+}
+
+void TouchScreen::TouchReleased(std::size_t finger_id) {
+    const auto index = GetIndexFromFingerId(finger_id);
+    if (!index) {
+        return;
+    }
+    const auto i = index.value();
+    fingers[i].is_enabled = false;
+    SetButton(identifier, static_cast<int>(i), false);
+    SetAxis(identifier, static_cast<int>(i * 2), 0.0f);
+    SetAxis(identifier, static_cast<int>(i * 2 + 1), 0.0f);
+}
+
+std::optional<std::size_t> TouchScreen::GetIndexFromFingerId(std::size_t finger_id) const {
+    for (std::size_t index = 0; index < MAX_FINGER_COUNT; ++index) {
+        const auto& finger = fingers[index];
+        if (!finger.is_enabled) {
+            continue;
+        }
+        if (finger.finger_id == finger_id) {
+            return index;
+        }
+    }
+    return std::nullopt;
+}
+
+std::optional<std::size_t> TouchScreen::GetNextFreeIndex() const {
+    for (std::size_t index = 0; index < MAX_FINGER_COUNT; ++index) {
+        if (!fingers[index].is_enabled) {
+            return index;
+        }
+    }
+    return std::nullopt;
+}
+
+void TouchScreen::ClearActiveFlag() {
+    for (auto& finger : fingers) {
+        finger.is_active = false;
+    }
+}
+
+void TouchScreen::ReleaseInactiveTouch() {
+    for (const auto& finger : fingers) {
+        if (!finger.is_active) {
+            TouchReleased(finger.finger_id);
+        }
+    }
+}
+
+void TouchScreen::ReleaseAllTouch() {
+    for (const auto& finger : fingers) {
+        if (finger.is_enabled) {
+            TouchReleased(finger.finger_id);
+        }
+    }
+}
+
+} // namespace InputCommon

src/input_common/drivers/touch_screen.h

@@ -0,0 +1,67 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <optional>
+
+#include "input_common/input_engine.h"
+
+namespace InputCommon {
+
+/**
+ * A touch device factory representing a touch screen. It receives touch events and forward them
+ * to all touch devices it created.
+ */
+class TouchScreen final : public InputEngine {
+public:
+    explicit TouchScreen(std::string input_engine_);
+
+    /**
+     * Signals that touch has moved and marks this touch point as active
+     * @param x new horizontal position
+     * @param y new vertical position
+     * @param finger_id of the touch point to be updated
+     */
+    void TouchMoved(float x, float y, std::size_t finger_id);
+
+    /**
+     * Signals and creates a new touch point with this finger id
+     * @param x starting horizontal position
+     * @param y starting vertical position
+     * @param finger_id to be assigned to the new touch point
+     */
+    void TouchPressed(float x, float y, std::size_t finger_id);
+
+    /**
+     * Signals and resets the touch point related to the this finger id
+     * @param finger_id to be released
+     */
+    void TouchReleased(std::size_t finger_id);
+
+    /// Resets the active flag for each touch point
+    void ClearActiveFlag();
+
+    /// Releases all touch that haven't been marked as active
+    void ReleaseInactiveTouch();
+
+    /// Resets all inputs to their initial value
+    void ReleaseAllTouch();
+
+private:
+    static constexpr std::size_t MAX_FINGER_COUNT = 16;
+
+    struct TouchStatus {
+        std::size_t finger_id{};
+        bool is_enabled{};
+        bool is_active{};
+    };
+
+    std::optional<std::size_t> GetIndexFromFingerId(std::size_t finger_id) const;
+
+    std::optional<std::size_t> GetNextFreeIndex() const;
+
+    std::array<TouchStatus, MAX_FINGER_COUNT> fingers{};
+};
+
+} // namespace InputCommon

src/input_common/drivers/udp_client.cpp

@@ -0,0 +1,648 @@
+// SPDX-FileCopyrightText: 2018 Citra Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <random>
+#include <boost/asio.hpp>
+#include <fmt/format.h>
+
+#include "common/logging/log.h"
+#include "common/param_package.h"
+#include "common/settings.h"
+#include "input_common/drivers/udp_client.h"
+#include "input_common/helpers/udp_protocol.h"
+
+using boost::asio::ip::udp;
+
+namespace InputCommon::CemuhookUDP {
+
+struct SocketCallback {
+    std::function<void(Response::Version)> version;
+    std::function<void(Response::PortInfo)> port_info;
+    std::function<void(Response::PadData)> pad_data;
+};
+
+class Socket {
+public:
+    using clock = std::chrono::system_clock;
+
+    explicit Socket(const std::string& host, u16 port, SocketCallback callback_)
+        : callback(std::move(callback_)), timer(io_service),
+          socket(io_service, udp::endpoint(udp::v4(), 0)), client_id(GenerateRandomClientId()) {
+        boost::system::error_code ec{};
+        auto ipv4 = boost::asio::ip::make_address_v4(host, ec);
+        if (ec.value() != boost::system::errc::success) {
+            LOG_ERROR(Input, "Invalid IPv4 address \"{}\" provided to socket", host);
+            ipv4 = boost::asio::ip::address_v4{};
+        }
+
+        send_endpoint = {udp::endpoint(ipv4, port)};
+    }
+
+    void Stop() {
+        io_service.stop();
+    }
+
+    void Loop() {
+        io_service.run();
+    }
+
+    void StartSend(const clock::time_point& from) {
+        timer.expires_at(from + std::chrono::seconds(3));
+        timer.async_wait([this](const boost::system::error_code& error) { HandleSend(error); });
+    }
+
+    void StartReceive() {
+        socket.async_receive_from(
+            boost::asio::buffer(receive_buffer), receive_endpoint,
+            [this](const boost::system::error_code& error, std::size_t bytes_transferred) {
+                HandleReceive(error, bytes_transferred);
+            });
+    }
+
+private:
+    u32 GenerateRandomClientId() const {
+        std::random_device device;
+        return device();
+    }
+
+    void HandleReceive(const boost::system::error_code&, std::size_t bytes_transferred) {
+        if (auto type = Response::Validate(receive_buffer.data(), bytes_transferred)) {
+            switch (*type) {
+            case Type::Version: {
+                Response::Version version;
+                std::memcpy(&version, &receive_buffer[sizeof(Header)], sizeof(Response::Version));
+                callback.version(std::move(version));
+                break;
+            }
+            case Type::PortInfo: {
+                Response::PortInfo port_info;
+                std::memcpy(&port_info, &receive_buffer[sizeof(Header)],
+                            sizeof(Response::PortInfo));
+                callback.port_info(std::move(port_info));
+                break;
+            }
+            case Type::PadData: {
+                Response::PadData pad_data;
+                std::memcpy(&pad_data, &receive_buffer[sizeof(Header)], sizeof(Response::PadData));
+                callback.pad_data(std::move(pad_data));
+                break;
+            }
+            }
+        }
+        StartReceive();
+    }
+
+    void HandleSend(const boost::system::error_code&) {
+        boost::system::error_code _ignored{};
+        // Send a request for getting port info for the pad
+        const Request::PortInfo port_info{4, {0, 1, 2, 3}};
+        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
+        const Request::PadData pad_data{
+            Request::RegisterFlags::AllPads,
+            0,
+            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);
+        StartSend(timer.expiry());
+    }
+
+    SocketCallback callback;
+    boost::asio::io_service io_service;
+    boost::asio::basic_waitable_timer<clock> timer;
+    udp::socket socket;
+
+    const u32 client_id;
+
+    static constexpr std::size_t PORT_INFO_SIZE = sizeof(Message<Request::PortInfo>);
+    static constexpr std::size_t PAD_DATA_SIZE = sizeof(Message<Request::PadData>);
+    std::array<u8, PORT_INFO_SIZE> send_buffer1;
+    std::array<u8, PAD_DATA_SIZE> send_buffer2;
+    udp::endpoint send_endpoint;
+
+    std::array<u8, MAX_PACKET_SIZE> receive_buffer;
+    udp::endpoint receive_endpoint;
+};
+
+static void SocketLoop(Socket* socket) {
+    socket->StartReceive();
+    socket->StartSend(Socket::clock::now());
+    socket->Loop();
+}
+
+UDPClient::UDPClient(std::string input_engine_) : InputEngine(std::move(input_engine_)) {
+    LOG_INFO(Input, "Udp Initialization started");
+    ReloadSockets();
+}
+
+UDPClient::~UDPClient() {
+    Reset();
+}
+
+UDPClient::ClientConnection::ClientConnection() = default;
+
+UDPClient::ClientConnection::~ClientConnection() = default;
+
+void UDPClient::ReloadSockets() {
+    Reset();
+
+    std::stringstream servers_ss(Settings::values.udp_input_servers.GetValue());
+    std::string server_token;
+    std::size_t client = 0;
+    while (std::getline(servers_ss, server_token, ',')) {
+        if (client == MAX_UDP_CLIENTS) {
+            break;
+        }
+        std::stringstream server_ss(server_token);
+        std::string token;
+        std::getline(server_ss, token, ':');
+        std::string udp_input_address = token;
+        std::getline(server_ss, token, ':');
+        char* temp;
+        const u16 udp_input_port = static_cast<u16>(std::strtol(token.c_str(), &temp, 0));
+        if (*temp != '\0') {
+            LOG_ERROR(Input, "Port number is not valid {}", token);
+            continue;
+        }
+
+        const std::size_t client_number = GetClientNumber(udp_input_address, udp_input_port);
+        if (client_number != MAX_UDP_CLIENTS) {
+            LOG_ERROR(Input, "Duplicated UDP servers found");
+            continue;
+        }
+        StartCommunication(client++, udp_input_address, udp_input_port);
+    }
+}
+
+std::size_t UDPClient::GetClientNumber(std::string_view host, u16 port) const {
+    for (std::size_t client = 0; client < clients.size(); client++) {
+        if (clients[client].active == -1) {
+            continue;
+        }
+        if (clients[client].host == host && clients[client].port == port) {
+            return client;
+        }
+    }
+    return MAX_UDP_CLIENTS;
+}
+
+Common::Input::BatteryLevel UDPClient::GetBatteryLevel(Response::Battery battery) const {
+    switch (battery) {
+    case Response::Battery::Dying:
+        return Common::Input::BatteryLevel::Empty;
+    case Response::Battery::Low:
+        return Common::Input::BatteryLevel::Critical;
+    case Response::Battery::Medium:
+        return Common::Input::BatteryLevel::Low;
+    case Response::Battery::High:
+        return Common::Input::BatteryLevel::Medium;
+    case Response::Battery::Full:
+    case Response::Battery::Charged:
+        return Common::Input::BatteryLevel::Full;
+    case Response::Battery::Charging:
+    default:
+        return Common::Input::BatteryLevel::Charging;
+    }
+}
+
+void UDPClient::OnVersion([[maybe_unused]] Response::Version data) {
+    LOG_TRACE(Input, "Version packet received: {}", data.version);
+}
+
+void UDPClient::OnPortInfo([[maybe_unused]] Response::PortInfo data) {
+    LOG_TRACE(Input, "PortInfo packet received: {}", data.model);
+}
+
+void UDPClient::OnPadData(Response::PadData data, std::size_t client) {
+    const std::size_t pad_index = (client * PADS_PER_CLIENT) + data.info.id;
+
+    if (pad_index >= pads.size()) {
+        LOG_ERROR(Input, "Invalid pad id {}", data.info.id);
+        return;
+    }
+
+    LOG_TRACE(Input, "PadData packet received");
+    if (data.packet_counter == pads[pad_index].packet_sequence) {
+        LOG_WARNING(
+            Input,
+            "PadData packet dropped because its stale info. Current count: {} Packet count: {}",
+            pads[pad_index].packet_sequence, data.packet_counter);
+        pads[pad_index].connected = false;
+        return;
+    }
+
+    clients[client].active = 1;
+    pads[pad_index].connected = true;
+    pads[pad_index].packet_sequence = data.packet_counter;
+
+    const auto now = std::chrono::steady_clock::now();
+    const auto time_difference = static_cast<u64>(
+        std::chrono::duration_cast<std::chrono::microseconds>(now - pads[pad_index].last_update)
+            .count());
+    pads[pad_index].last_update = now;
+
+    // Gyroscope values are not it the correct scale from better joy.
+    // Dividing by 312 allows us to make one full turn = 1 turn
+    // This must be a configurable valued called sensitivity
+    const float gyro_scale = 1.0f / 312.0f;
+
+    const BasicMotion motion{
+        .gyro_x = data.gyro.pitch * gyro_scale,
+        .gyro_y = data.gyro.roll * gyro_scale,
+        .gyro_z = -data.gyro.yaw * gyro_scale,
+        .accel_x = data.accel.x,
+        .accel_y = -data.accel.z,
+        .accel_z = data.accel.y,
+        .delta_timestamp = time_difference,
+    };
+    const PadIdentifier identifier = GetPadIdentifier(pad_index);
+    SetMotion(identifier, 0, motion);
+
+    for (std::size_t id = 0; id < data.touch.size(); ++id) {
+        const auto touch_pad = data.touch[id];
+        const auto touch_axis_x_id =
+            static_cast<int>(id == 0 ? PadAxes::Touch1X : PadAxes::Touch2X);
+        const auto touch_axis_y_id =
+            static_cast<int>(id == 0 ? PadAxes::Touch1Y : PadAxes::Touch2Y);
+        const auto touch_button_id =
+            static_cast<int>(id == 0 ? PadButton::Touch1 : PadButton::Touch2);
+
+        // TODO: Use custom calibration per device
+        const Common::ParamPackage touch_param(Settings::values.touch_device.GetValue());
+        const u16 min_x = static_cast<u16>(touch_param.Get("min_x", 100));
+        const u16 min_y = static_cast<u16>(touch_param.Get("min_y", 50));
+        const u16 max_x = static_cast<u16>(touch_param.Get("max_x", 1800));
+        const u16 max_y = static_cast<u16>(touch_param.Get("max_y", 850));
+
+        const f32 x =
+            static_cast<f32>(std::clamp(static_cast<u16>(touch_pad.x), min_x, max_x) - min_x) /
+            static_cast<f32>(max_x - min_x);
+        const f32 y =
+            static_cast<f32>(std::clamp(static_cast<u16>(touch_pad.y), min_y, max_y) - min_y) /
+            static_cast<f32>(max_y - min_y);
+
+        if (touch_pad.is_active) {
+            SetAxis(identifier, touch_axis_x_id, x);
+            SetAxis(identifier, touch_axis_y_id, y);
+            SetButton(identifier, touch_button_id, true);
+            continue;
+        }
+        SetAxis(identifier, touch_axis_x_id, 0);
+        SetAxis(identifier, touch_axis_y_id, 0);
+        SetButton(identifier, touch_button_id, false);
+    }
+
+    SetAxis(identifier, static_cast<int>(PadAxes::LeftStickX),
+            (data.left_stick_x - 127.0f) / 127.0f);
+    SetAxis(identifier, static_cast<int>(PadAxes::LeftStickY),
+            (data.left_stick_y - 127.0f) / 127.0f);
+    SetAxis(identifier, static_cast<int>(PadAxes::RightStickX),
+            (data.right_stick_x - 127.0f) / 127.0f);
+    SetAxis(identifier, static_cast<int>(PadAxes::RightStickY),
+            (data.right_stick_y - 127.0f) / 127.0f);
+
+    static constexpr std::array<PadButton, 16> buttons{
+        PadButton::Share,    PadButton::L3,     PadButton::R3,    PadButton::Options,
+        PadButton::Up,       PadButton::Right,  PadButton::Down,  PadButton::Left,
+        PadButton::L2,       PadButton::R2,     PadButton::L1,    PadButton::R1,
+        PadButton::Triangle, PadButton::Circle, PadButton::Cross, PadButton::Square};
+
+    for (std::size_t i = 0; i < buttons.size(); ++i) {
+        const bool button_status = (data.digital_button & (1U << i)) != 0;
+        const int button = static_cast<int>(buttons[i]);
+        SetButton(identifier, button, button_status);
+    }
+
+    SetButton(identifier, static_cast<int>(PadButton::Home), data.home != 0);
+    SetButton(identifier, static_cast<int>(PadButton::TouchHardPress), data.touch_hard_press != 0);
+
+    SetBattery(identifier, GetBatteryLevel(data.info.battery));
+}
+
+void UDPClient::StartCommunication(std::size_t client, const std::string& host, u16 port) {
+    SocketCallback callback{[this](Response::Version version) { OnVersion(version); },
+                            [this](Response::PortInfo info) { OnPortInfo(info); },
+                            [this, client](Response::PadData data) { OnPadData(data, client); }};
+    LOG_INFO(Input, "Starting communication with UDP input server on {}:{}", host, port);
+    clients[client].uuid = GetHostUUID(host);
+    clients[client].host = host;
+    clients[client].port = port;
+    clients[client].active = 0;
+    clients[client].socket = std::make_unique<Socket>(host, port, callback);
+    clients[client].thread = std::thread{SocketLoop, clients[client].socket.get()};
+    for (std::size_t index = 0; index < PADS_PER_CLIENT; ++index) {
+        const PadIdentifier identifier = GetPadIdentifier(client * PADS_PER_CLIENT + index);
+        PreSetController(identifier);
+    }
+}
+
+PadIdentifier UDPClient::GetPadIdentifier(std::size_t pad_index) const {
+    const std::size_t client = pad_index / PADS_PER_CLIENT;
+    return {
+        .guid = clients[client].uuid,
+        .port = static_cast<std::size_t>(clients[client].port),
+        .pad = pad_index,
+    };
+}
+
+Common::UUID UDPClient::GetHostUUID(const std::string& host) const {
+    const auto ip = boost::asio::ip::make_address_v4(host);
+    const auto hex_host = fmt::format("00000000-0000-0000-0000-0000{:06x}", ip.to_uint());
+    return Common::UUID{hex_host};
+}
+
+void UDPClient::Reset() {
+    for (auto& client : clients) {
+        if (client.thread.joinable()) {
+            client.active = -1;
+            client.socket->Stop();
+            client.thread.join();
+        }
+    }
+}
+
+std::vector<Common::ParamPackage> UDPClient::GetInputDevices() const {
+    std::vector<Common::ParamPackage> devices;
+    if (!Settings::values.enable_udp_controller) {
+        return devices;
+    }
+    for (std::size_t client = 0; client < clients.size(); client++) {
+        if (clients[client].active != 1) {
+            continue;
+        }
+        for (std::size_t index = 0; index < PADS_PER_CLIENT; ++index) {
+            const std::size_t pad_index = client * PADS_PER_CLIENT + index;
+            if (!pads[pad_index].connected) {
+                continue;
+            }
+            const auto pad_identifier = GetPadIdentifier(pad_index);
+            Common::ParamPackage identifier{};
+            identifier.Set("engine", GetEngineName());
+            identifier.Set("display", fmt::format("UDP Controller {}", pad_identifier.pad));
+            identifier.Set("guid", pad_identifier.guid.RawString());
+            identifier.Set("port", static_cast<int>(pad_identifier.port));
+            identifier.Set("pad", static_cast<int>(pad_identifier.pad));
+            devices.emplace_back(identifier);
+        }
+    }
+    return devices;
+}
+
+ButtonMapping UDPClient::GetButtonMappingForDevice(const Common::ParamPackage& params) {
+    // This list excludes any button that can't be really mapped
+    static constexpr std::array<std::pair<Settings::NativeButton::Values, PadButton>, 20>
+        switch_to_dsu_button = {
+            std::pair{Settings::NativeButton::A, PadButton::Circle},
+            {Settings::NativeButton::B, PadButton::Cross},
+            {Settings::NativeButton::X, PadButton::Triangle},
+            {Settings::NativeButton::Y, PadButton::Square},
+            {Settings::NativeButton::Start, PadButton::Options},
+            {Settings::NativeButton::Select, PadButton::Share},
+            {Settings::NativeButton::DLeft, PadButton::Left},
+            {Settings::NativeButton::DUp, PadButton::Up},
+            {Settings::NativeButton::DRight, PadButton::Right},
+            {Settings::NativeButton::DDown, PadButton::Down},
+            {Settings::NativeButton::L, PadButton::L1},
+            {Settings::NativeButton::R, PadButton::R1},
+            {Settings::NativeButton::ZL, PadButton::L2},
+            {Settings::NativeButton::ZR, PadButton::R2},
+            {Settings::NativeButton::ZL, PadButton::L2},
+            {Settings::NativeButton::ZR, PadButton::R2},
+            {Settings::NativeButton::Home, PadButton::Home},
+        };
+    if (!params.Has("guid") || !params.Has("port") || !params.Has("pad")) {
+        return {};
+    }
+
+    ButtonMapping mapping{};
+    for (const auto& [switch_button, dsu_button] : switch_to_dsu_button) {
+        Common::ParamPackage button_params{};
+        button_params.Set("engine", GetEngineName());
+        button_params.Set("guid", params.Get("guid", ""));
+        button_params.Set("port", params.Get("port", 0));
+        button_params.Set("pad", params.Get("pad", 0));
+        button_params.Set("button", static_cast<int>(dsu_button));
+        mapping.insert_or_assign(switch_button, std::move(button_params));
+    }
+
+    return mapping;
+}
+
+AnalogMapping UDPClient::GetAnalogMappingForDevice(const Common::ParamPackage& params) {
+    if (!params.Has("guid") || !params.Has("port") || !params.Has("pad")) {
+        return {};
+    }
+
+    AnalogMapping mapping = {};
+    Common::ParamPackage left_analog_params;
+    left_analog_params.Set("engine", GetEngineName());
+    left_analog_params.Set("guid", params.Get("guid", ""));
+    left_analog_params.Set("port", params.Get("port", 0));
+    left_analog_params.Set("pad", params.Get("pad", 0));
+    left_analog_params.Set("axis_x", static_cast<int>(PadAxes::LeftStickX));
+    left_analog_params.Set("axis_y", static_cast<int>(PadAxes::LeftStickY));
+    mapping.insert_or_assign(Settings::NativeAnalog::LStick, std::move(left_analog_params));
+
+    Common::ParamPackage right_analog_params;
+    right_analog_params.Set("engine", GetEngineName());
+    right_analog_params.Set("guid", params.Get("guid", ""));
+    right_analog_params.Set("port", params.Get("port", 0));
+    right_analog_params.Set("pad", params.Get("pad", 0));
+    right_analog_params.Set("axis_x", static_cast<int>(PadAxes::RightStickX));
+    right_analog_params.Set("axis_y", static_cast<int>(PadAxes::RightStickY));
+    mapping.insert_or_assign(Settings::NativeAnalog::RStick, std::move(right_analog_params));
+    return mapping;
+}
+
+MotionMapping UDPClient::GetMotionMappingForDevice(const Common::ParamPackage& params) {
+    if (!params.Has("guid") || !params.Has("port") || !params.Has("pad")) {
+        return {};
+    }
+
+    MotionMapping mapping = {};
+    Common::ParamPackage left_motion_params;
+    left_motion_params.Set("engine", GetEngineName());
+    left_motion_params.Set("guid", params.Get("guid", ""));
+    left_motion_params.Set("port", params.Get("port", 0));
+    left_motion_params.Set("pad", params.Get("pad", 0));
+    left_motion_params.Set("motion", 0);
+
+    Common::ParamPackage right_motion_params;
+    right_motion_params.Set("engine", GetEngineName());
+    right_motion_params.Set("guid", params.Get("guid", ""));
+    right_motion_params.Set("port", params.Get("port", 0));
+    right_motion_params.Set("pad", params.Get("pad", 0));
+    right_motion_params.Set("motion", 0);
+
+    mapping.insert_or_assign(Settings::NativeMotion::MotionLeft, std::move(left_motion_params));
+    mapping.insert_or_assign(Settings::NativeMotion::MotionRight, std::move(right_motion_params));
+    return mapping;
+}
+
+Common::Input::ButtonNames UDPClient::GetUIButtonName(const Common::ParamPackage& params) const {
+    PadButton button = static_cast<PadButton>(params.Get("button", 0));
+    switch (button) {
+    case PadButton::Left:
+        return Common::Input::ButtonNames::ButtonLeft;
+    case PadButton::Right:
+        return Common::Input::ButtonNames::ButtonRight;
+    case PadButton::Down:
+        return Common::Input::ButtonNames::ButtonDown;
+    case PadButton::Up:
+        return Common::Input::ButtonNames::ButtonUp;
+    case PadButton::L1:
+        return Common::Input::ButtonNames::L1;
+    case PadButton::L2:
+        return Common::Input::ButtonNames::L2;
+    case PadButton::L3:
+        return Common::Input::ButtonNames::L3;
+    case PadButton::R1:
+        return Common::Input::ButtonNames::R1;
+    case PadButton::R2:
+        return Common::Input::ButtonNames::R2;
+    case PadButton::R3:
+        return Common::Input::ButtonNames::R3;
+    case PadButton::Circle:
+        return Common::Input::ButtonNames::Circle;
+    case PadButton::Cross:
+        return Common::Input::ButtonNames::Cross;
+    case PadButton::Square:
+        return Common::Input::ButtonNames::Square;
+    case PadButton::Triangle:
+        return Common::Input::ButtonNames::Triangle;
+    case PadButton::Share:
+        return Common::Input::ButtonNames::Share;
+    case PadButton::Options:
+        return Common::Input::ButtonNames::Options;
+    case PadButton::Home:
+        return Common::Input::ButtonNames::Home;
+    case PadButton::Touch1:
+    case PadButton::Touch2:
+    case PadButton::TouchHardPress:
+        return Common::Input::ButtonNames::Touch;
+    default:
+        return Common::Input::ButtonNames::Undefined;
+    }
+}
+
+Common::Input::ButtonNames UDPClient::GetUIName(const Common::ParamPackage& params) const {
+    if (params.Has("button")) {
+        return GetUIButtonName(params);
+    }
+    if (params.Has("axis")) {
+        return Common::Input::ButtonNames::Value;
+    }
+    if (params.Has("motion")) {
+        return Common::Input::ButtonNames::Engine;
+    }
+
+    return Common::Input::ButtonNames::Invalid;
+}
+
+bool UDPClient::IsStickInverted(const Common::ParamPackage& params) {
+    if (!params.Has("guid") || !params.Has("port") || !params.Has("pad")) {
+        return false;
+    }
+
+    const auto x_axis = static_cast<PadAxes>(params.Get("axis_x", 0));
+    const auto y_axis = static_cast<PadAxes>(params.Get("axis_y", 0));
+    if (x_axis != PadAxes::LeftStickY && x_axis != PadAxes::RightStickY) {
+        return false;
+    }
+    if (y_axis != PadAxes::LeftStickX && y_axis != PadAxes::RightStickX) {
+        return false;
+    }
+    return true;
+}
+
+void TestCommunication(const std::string& host, u16 port,
+                       const std::function<void()>& success_callback,
+                       const std::function<void()>& failure_callback) {
+    std::thread([=] {
+        Common::Event success_event;
+        SocketCallback callback{
+            .version = [](Response::Version) {},
+            .port_info = [](Response::PortInfo) {},
+            .pad_data = [&](Response::PadData) { success_event.Set(); },
+        };
+        Socket socket{host, port, std::move(callback)};
+        std::thread worker_thread{SocketLoop, &socket};
+        const bool result =
+            success_event.WaitUntil(std::chrono::steady_clock::now() + std::chrono::seconds(10));
+        socket.Stop();
+        worker_thread.join();
+        if (result) {
+            success_callback();
+        } else {
+            failure_callback();
+        }
+    }).detach();
+}
+
+CalibrationConfigurationJob::CalibrationConfigurationJob(
+    const std::string& host, u16 port, std::function<void(Status)> status_callback,
+    std::function<void(u16, u16, u16, u16)> data_callback) {
+
+    std::thread([=, this] {
+        u16 min_x{UINT16_MAX};
+        u16 min_y{UINT16_MAX};
+        u16 max_x{};
+        u16 max_y{};
+
+        Status current_status{Status::Initialized};
+        SocketCallback callback{[](Response::Version) {}, [](Response::PortInfo) {},
+                                [&](Response::PadData data) {
+                                    constexpr u16 CALIBRATION_THRESHOLD = 100;
+
+                                    if (current_status == Status::Initialized) {
+                                        // Receiving data means the communication is ready now
+                                        current_status = Status::Ready;
+                                        status_callback(current_status);
+                                    }
+                                    if (data.touch[0].is_active == 0) {
+                                        return;
+                                    }
+                                    LOG_DEBUG(Input, "Current touch: {} {}", data.touch[0].x,
+                                              data.touch[0].y);
+                                    min_x = std::min(min_x, static_cast<u16>(data.touch[0].x));
+                                    min_y = std::min(min_y, static_cast<u16>(data.touch[0].y));
+                                    if (current_status == Status::Ready) {
+                                        // First touch - min data (min_x/min_y)
+                                        current_status = Status::Stage1Completed;
+                                        status_callback(current_status);
+                                    }
+                                    if (data.touch[0].x - min_x > CALIBRATION_THRESHOLD &&
+                                        data.touch[0].y - min_y > CALIBRATION_THRESHOLD) {
+                                        // Set the current position as max value and finishes
+                                        // configuration
+                                        max_x = data.touch[0].x;
+                                        max_y = data.touch[0].y;
+                                        current_status = Status::Completed;
+                                        data_callback(min_x, min_y, max_x, max_y);
+                                        status_callback(current_status);
+
+                                        complete_event.Set();
+                                    }
+                                }};
+        Socket socket{host, port, std::move(callback)};
+        std::thread worker_thread{SocketLoop, &socket};
+        complete_event.Wait();
+        socket.Stop();
+        worker_thread.join();
+    }).detach();
+}
+
+CalibrationConfigurationJob::~CalibrationConfigurationJob() {
+    Stop();
+}
+
+void CalibrationConfigurationJob::Stop() {
+    complete_event.Set();
+}
+
+} // namespace InputCommon::CemuhookUDP

src/input_common/drivers/udp_client.h

@@ -0,0 +1,192 @@
+// SPDX-FileCopyrightText: 2018 Citra Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <optional>
+
+#include "common/common_types.h"
+#include "common/thread.h"
+#include "input_common/input_engine.h"
+
+namespace InputCommon::CemuhookUDP {
+
+class Socket;
+
+namespace Response {
+enum class Battery : u8;
+struct PadData;
+struct PortInfo;
+struct TouchPad;
+struct Version;
+} // namespace Response
+
+enum class PadTouch {
+    Click,
+    Undefined,
+};
+
+struct UDPPadStatus {
+    std::string host{"127.0.0.1"};
+    u16 port{26760};
+    std::size_t pad_index{};
+};
+
+struct DeviceStatus {
+    std::mutex update_mutex;
+
+    // calibration data for scaling the device's touch area to 3ds
+    struct CalibrationData {
+        u16 min_x{};
+        u16 min_y{};
+        u16 max_x{};
+        u16 max_y{};
+    };
+    std::optional<CalibrationData> touch_calibration;
+};
+
+/**
+ * A button device factory representing a keyboard. It receives keyboard events and forward them
+ * to all button devices it created.
+ */
+class UDPClient final : public InputEngine {
+public:
+    explicit UDPClient(std::string input_engine_);
+    ~UDPClient() override;
+
+    void ReloadSockets();
+
+    /// Used for automapping features
+    std::vector<Common::ParamPackage> GetInputDevices() const override;
+    ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& params) override;
+    AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& params) override;
+    MotionMapping GetMotionMappingForDevice(const Common::ParamPackage& params) override;
+    Common::Input::ButtonNames GetUIName(const Common::ParamPackage& params) const override;
+
+    bool IsStickInverted(const Common::ParamPackage& params) override;
+
+private:
+    enum class PadButton {
+        Undefined = 0x0000,
+        Share = 0x0001,
+        L3 = 0x0002,
+        R3 = 0x0004,
+        Options = 0x0008,
+        Up = 0x0010,
+        Right = 0x0020,
+        Down = 0x0040,
+        Left = 0x0080,
+        L2 = 0x0100,
+        R2 = 0x0200,
+        L1 = 0x0400,
+        R1 = 0x0800,
+        Triangle = 0x1000,
+        Circle = 0x2000,
+        Cross = 0x4000,
+        Square = 0x8000,
+        Touch1 = 0x10000,
+        Touch2 = 0x20000,
+        Home = 0x40000,
+        TouchHardPress = 0x80000,
+    };
+
+    enum class PadAxes : u8 {
+        LeftStickX,
+        LeftStickY,
+        RightStickX,
+        RightStickY,
+        AnalogLeft,
+        AnalogDown,
+        AnalogRight,
+        AnalogUp,
+        AnalogSquare,
+        AnalogCross,
+        AnalogCircle,
+        AnalogTriangle,
+        AnalogR1,
+        AnalogL1,
+        AnalogR2,
+        AnalogL3,
+        AnalogR3,
+        Touch1X,
+        Touch1Y,
+        Touch2X,
+        Touch2Y,
+        Undefined,
+    };
+
+    struct PadData {
+        std::size_t pad_index{};
+        bool connected{};
+        DeviceStatus status;
+        u64 packet_sequence{};
+
+        std::chrono::time_point<std::chrono::steady_clock> last_update;
+    };
+
+    struct ClientConnection {
+        ClientConnection();
+        ~ClientConnection();
+        Common::UUID uuid{"00000000-0000-0000-0000-00007F000001"};
+        std::string host{"127.0.0.1"};
+        u16 port{26760};
+        s8 active{-1};
+        std::unique_ptr<Socket> socket;
+        std::thread thread;
+    };
+
+    // For shutting down, clear all data, join all threads, release usb
+    void Reset();
+
+    // Translates configuration to client number
+    std::size_t GetClientNumber(std::string_view host, u16 port) const;
+
+    // Translates UDP battery level to input engine battery level
+    Common::Input::BatteryLevel GetBatteryLevel(Response::Battery battery) const;
+
+    void OnVersion(Response::Version);
+    void OnPortInfo(Response::PortInfo);
+    void OnPadData(Response::PadData, std::size_t client);
+    void StartCommunication(std::size_t client, const std::string& host, u16 port);
+    PadIdentifier GetPadIdentifier(std::size_t pad_index) const;
+    Common::UUID GetHostUUID(const std::string& host) const;
+
+    Common::Input::ButtonNames GetUIButtonName(const Common::ParamPackage& params) const;
+
+    // Allocate clients for 8 udp servers
+    static constexpr std::size_t MAX_UDP_CLIENTS = 8;
+    static constexpr std::size_t PADS_PER_CLIENT = 4;
+    std::array<PadData, MAX_UDP_CLIENTS * PADS_PER_CLIENT> pads{};
+    std::array<ClientConnection, MAX_UDP_CLIENTS> clients{};
+};
+
+/// An async job allowing configuration of the touchpad calibration.
+class CalibrationConfigurationJob {
+public:
+    enum class Status {
+        Initialized,
+        Ready,
+        Stage1Completed,
+        Completed,
+    };
+    /**
+     * Constructs and starts the job with the specified parameter.
+     *
+     * @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,
+                                         std::function<void(Status)> status_callback,
+                                         std::function<void(u16, u16, u16, u16)> data_callback);
+    ~CalibrationConfigurationJob();
+    void Stop();
+
+private:
+    Common::Event complete_event;
+};
+
+void TestCommunication(const std::string& host, u16 port,
+                       const std::function<void()>& success_callback,
+                       const std::function<void()>& failure_callback);
+
+} // namespace InputCommon::CemuhookUDP

src/input_common/drivers/virtual_gamepad.cpp

@@ -0,0 +1,75 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "input_common/drivers/virtual_gamepad.h"
+
+namespace InputCommon {
+constexpr std::size_t PlayerIndexCount = 10;
+
+VirtualGamepad::VirtualGamepad(std::string input_engine_) : InputEngine(std::move(input_engine_)) {
+    for (std::size_t i = 0; i < PlayerIndexCount; i++) {
+        PreSetController(GetIdentifier(i));
+    }
+}
+
+void VirtualGamepad::SetButtonState(std::size_t player_index, int button_id, bool value) {
+    if (player_index > PlayerIndexCount) {
+        return;
+    }
+    const auto identifier = GetIdentifier(player_index);
+    SetButton(identifier, button_id, value);
+}
+
+void VirtualGamepad::SetButtonState(std::size_t player_index, VirtualButton button_id, bool value) {
+    SetButtonState(player_index, static_cast<int>(button_id), value);
+}
+
+void VirtualGamepad::SetStickPosition(std::size_t player_index, int axis_id, float x_value,
+                                      float y_value) {
+    if (player_index > PlayerIndexCount) {
+        return;
+    }
+    const auto identifier = GetIdentifier(player_index);
+    SetAxis(identifier, axis_id * 2, x_value);
+    SetAxis(identifier, (axis_id * 2) + 1, y_value);
+}
+
+void VirtualGamepad::SetStickPosition(std::size_t player_index, VirtualStick axis_id, float x_value,
+                                      float y_value) {
+    SetStickPosition(player_index, static_cast<int>(axis_id), x_value, y_value);
+}
+
+void VirtualGamepad::ResetControllers() {
+    for (std::size_t i = 0; i < PlayerIndexCount; i++) {
+        SetStickPosition(i, VirtualStick::Left, 0.0f, 0.0f);
+        SetStickPosition(i, VirtualStick::Right, 0.0f, 0.0f);
+
+        SetButtonState(i, VirtualButton::ButtonA, false);
+        SetButtonState(i, VirtualButton::ButtonB, false);
+        SetButtonState(i, VirtualButton::ButtonX, false);
+        SetButtonState(i, VirtualButton::ButtonY, false);
+        SetButtonState(i, VirtualButton::StickL, false);
+        SetButtonState(i, VirtualButton::StickR, false);
+        SetButtonState(i, VirtualButton::TriggerL, false);
+        SetButtonState(i, VirtualButton::TriggerR, false);
+        SetButtonState(i, VirtualButton::TriggerZL, false);
+        SetButtonState(i, VirtualButton::TriggerZR, false);
+        SetButtonState(i, VirtualButton::ButtonStart, false);
+        SetButtonState(i, VirtualButton::ButtonSelect, false);
+        SetButtonState(i, VirtualButton::ButtonLeft, false);
+        SetButtonState(i, VirtualButton::ButtonUp, false);
+        SetButtonState(i, VirtualButton::ButtonRight, false);
+        SetButtonState(i, VirtualButton::ButtonDown, false);
+        SetButtonState(i, VirtualButton::ButtonHome, false);
+    }
+}
+
+PadIdentifier VirtualGamepad::GetIdentifier(std::size_t player_index) const {
+    return {
+        .guid = Common::UUID{},
+        .port = player_index,
+        .pad = 0,
+    };
+}
+
+} // namespace InputCommon

src/input_common/drivers/virtual_gamepad.h

@@ -0,0 +1,70 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "input_common/input_engine.h"
+
+namespace InputCommon {
+
+/**
+ * A virtual controller that is always assigned to the game input
+ */
+class VirtualGamepad final : public InputEngine {
+public:
+    enum class VirtualButton {
+        ButtonA,
+        ButtonB,
+        ButtonX,
+        ButtonY,
+        StickL,
+        StickR,
+        TriggerL,
+        TriggerR,
+        TriggerZL,
+        TriggerZR,
+        ButtonStart,
+        ButtonSelect,
+        ButtonLeft,
+        ButtonUp,
+        ButtonRight,
+        ButtonDown,
+        ButtonHome,
+    };
+
+    enum class VirtualStick {
+        Left = 0,
+        Right = 1,
+    };
+
+    explicit VirtualGamepad(std::string input_engine_);
+
+    /**
+     * Sets the status of all buttons bound with the key to pressed
+     * @param player_index the player number that will take this action
+     * @param button_id the id of the button
+     * @param value indicates if the button is pressed or not
+     */
+    void SetButtonState(std::size_t player_index, int button_id, bool value);
+    void SetButtonState(std::size_t player_index, VirtualButton button_id, bool value);
+
+    /**
+     * Sets the status of all buttons bound with the key to released
+     * @param player_index the player number that will take this action
+     * @param axis_id the id of the axis to move
+     * @param x_value the position of the stick in the x axis
+     * @param y_value the position of the stick in the y axis
+     */
+    void SetStickPosition(std::size_t player_index, int axis_id, float x_value, float y_value);
+    void SetStickPosition(std::size_t player_index, VirtualStick axis_id, float x_value,
+                          float y_value);
+
+    /// Restores all inputs into the neutral position
+    void ResetControllers();
+
+private:
+    /// Returns the correct identifier corresponding to the player index
+    PadIdentifier GetIdentifier(std::size_t player_index) const;
+};
+
+} // namespace InputCommon

src/input_common/gcadapter/gc_adapter.cpp

@@ -1,385 +0,0 @@
-// Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
-
-#include <chrono>
-#include <thread>
-#include <vector>
-
-#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"
-
-// Workaround for older libusb versions not having libusb_init_context.
-// libusb_init is deprecated and causes a compile error in newer versions.
-#if !defined(LIBUSB_API_VERSION) || (LIBUSB_API_VERSION < 0x0100010A)
-#define libusb_init_context(a, b, c) libusb_init(a)
-#endif
-
-namespace GCAdapter {
-
-Adapter::Adapter() {
-    if (usb_adapter_handle != nullptr) {
-        return;
-    }
-    const int init_res = libusb_init_context(&libusb_ctx, nullptr, 0);
-    if (init_res == LIBUSB_SUCCESS) {
-        adapter_scan_thread = std::thread(&Adapter::AdapterScanThread, this);
-    } else {
-        LOG_ERROR(Input, "libusb could not be initialized. failed with error = {}", init_res);
-    }
-}
-
-Adapter::~Adapter() {
-    JoinThreads();
-    ClearLibusbHandle();
-    ResetDevices();
-
-    if (libusb_ctx) {
-        libusb_exit(libusb_ctx);
-    }
-}
-
-void Adapter::AdapterInputThread() {
-    LOG_DEBUG(Input, "GC Adapter input thread started");
-    s32 payload_size{};
-    AdapterPayload adapter_payload{};
-
-    if (adapter_scan_thread.joinable()) {
-        adapter_scan_thread.join();
-    }
-
-    while (adapter_input_thread_running) {
-        libusb_interrupt_transfer(usb_adapter_handle, input_endpoint, adapter_payload.data(),
-                                  static_cast<s32>(adapter_payload.size()), &payload_size, 16);
-        if (IsPayloadCorrect(adapter_payload, payload_size)) {
-            UpdateControllers(adapter_payload);
-        }
-        std::this_thread::yield();
-    }
-
-    if (restart_scan_thread) {
-        adapter_scan_thread = std::thread(&Adapter::AdapterScanThread, this);
-        restart_scan_thread = false;
-    }
-}
-
-bool Adapter::IsPayloadCorrect(const AdapterPayload& adapter_payload, s32 payload_size) {
-    if (payload_size != static_cast<s32>(adapter_payload.size()) ||
-        adapter_payload[0] != LIBUSB_DT_HID) {
-        LOG_DEBUG(Input, "Error reading payload (size: {}, type: {:02x})", payload_size,
-                  adapter_payload[0]);
-        if (++input_error_counter > 20) {
-            LOG_ERROR(Input, "GC adapter timeout, Is the adapter connected?");
-            adapter_input_thread_running = false;
-            restart_scan_thread = true;
-        }
-        return false;
-    }
-
-    input_error_counter = 0;
-    return true;
-}
-
-void Adapter::UpdateControllers(const AdapterPayload& adapter_payload) {
-    for (std::size_t port = 0; port < pads.size(); ++port) {
-        const std::size_t offset = 1 + (9 * port);
-        const auto type = static_cast<ControllerTypes>(adapter_payload[offset] >> 4);
-        UpdatePadType(port, type);
-        if (DeviceConnected(port)) {
-            const u8 b1 = adapter_payload[offset + 1];
-            const u8 b2 = adapter_payload[offset + 2];
-            UpdateStateButtons(port, b1, b2);
-            UpdateStateAxes(port, adapter_payload);
-            if (configuring) {
-                UpdateSettings(port);
-            }
-        }
-    }
-}
-
-void Adapter::UpdatePadType(std::size_t port, ControllerTypes pad_type) {
-    if (pads[port].type == pad_type) {
-        return;
-    }
-    // Device changed reset device and set new type
-    ResetDevice(port);
-    pads[port].type = pad_type;
-}
-
-void Adapter::UpdateStateButtons(std::size_t port, u8 b1, u8 b2) {
-    if (port >= pads.size()) {
-        return;
-    }
-
-    static constexpr std::array<PadButton, 8> b1_buttons{
-        PadButton::ButtonA,    PadButton::ButtonB,     PadButton::ButtonX,    PadButton::ButtonY,
-        PadButton::ButtonLeft, PadButton::ButtonRight, PadButton::ButtonDown, PadButton::ButtonUp,
-    };
-
-    static constexpr std::array<PadButton, 4> b2_buttons{
-        PadButton::ButtonStart,
-        PadButton::TriggerZ,
-        PadButton::TriggerR,
-        PadButton::TriggerL,
-    };
-    pads[port].buttons = 0;
-    for (std::size_t i = 0; i < b1_buttons.size(); ++i) {
-        if ((b1 & (1U << i)) != 0) {
-            pads[port].buttons =
-                static_cast<u16>(pads[port].buttons | static_cast<u16>(b1_buttons[i]));
-            pads[port].last_button = b1_buttons[i];
-        }
-    }
-
-    for (std::size_t j = 0; j < b2_buttons.size(); ++j) {
-        if ((b2 & (1U << j)) != 0) {
-            pads[port].buttons =
-                static_cast<u16>(pads[port].buttons | static_cast<u16>(b2_buttons[j]));
-            pads[port].last_button = b2_buttons[j];
-        }
-    }
-}
-
-void Adapter::UpdateStateAxes(std::size_t port, const AdapterPayload& adapter_payload) {
-    if (port >= pads.size()) {
-        return;
-    }
-
-    const std::size_t offset = 1 + (9 * port);
-    static constexpr std::array<PadAxes, 6> axes{
-        PadAxes::StickX,    PadAxes::StickY,      PadAxes::SubstickX,
-        PadAxes::SubstickY, PadAxes::TriggerLeft, PadAxes::TriggerRight,
-    };
-
-    for (const PadAxes axis : axes) {
-        const auto index = static_cast<std::size_t>(axis);
-        const u8 axis_value = adapter_payload[offset + 3 + index];
-        if (pads[port].axis_origin[index] == 255) {
-            pads[port].axis_origin[index] = axis_value;
-        }
-        pads[port].axis_values[index] =
-            static_cast<s16>(axis_value - pads[port].axis_origin[index]);
-    }
-}
-
-void Adapter::UpdateSettings(std::size_t port) {
-    if (port >= pads.size()) {
-        return;
-    }
-
-    constexpr u8 axis_threshold = 50;
-    GCPadStatus pad_status = {port};
-
-    if (pads[port].buttons != 0) {
-        pad_status.button = pads[port].last_button;
-        pad_queue.Push(pad_status);
-    }
-
-    // Accounting for a threshold here to ensure an intentional press
-    for (std::size_t i = 0; i < pads[port].axis_values.size(); ++i) {
-        const s16 value = pads[port].axis_values[i];
-
-        if (value > axis_threshold || value < -axis_threshold) {
-            pad_status.axis = static_cast<PadAxes>(i);
-            pad_status.axis_value = value;
-            pad_status.axis_threshold = axis_threshold;
-            pad_queue.Push(pad_status);
-        }
-    }
-}
-
-void Adapter::AdapterScanThread() {
-    adapter_scan_thread_running = true;
-    adapter_input_thread_running = false;
-    if (adapter_input_thread.joinable()) {
-        adapter_input_thread.join();
-    }
-    ClearLibusbHandle();
-    ResetDevices();
-    while (adapter_scan_thread_running && !adapter_input_thread_running) {
-        Setup();
-        std::this_thread::sleep_for(std::chrono::seconds(1));
-    }
-}
-
-void Adapter::Setup() {
-    usb_adapter_handle = libusb_open_device_with_vid_pid(libusb_ctx, 0x057e, 0x0337);
-
-    if (usb_adapter_handle == NULL) {
-        return;
-    }
-    if (!CheckDeviceAccess()) {
-        ClearLibusbHandle();
-        return;
-    }
-
-    libusb_device* device = libusb_get_device(usb_adapter_handle);
-
-    LOG_INFO(Input, "GC adapter is now connected");
-    // GC Adapter found and accessible, registering it
-    if (GetGCEndpoint(device)) {
-        adapter_scan_thread_running = false;
-        adapter_input_thread_running = true;
-        input_error_counter = 0;
-        adapter_input_thread = std::thread(&Adapter::AdapterInputThread, this);
-    }
-}
-
-bool Adapter::CheckDeviceAccess() {
-    // This fixes payload problems from offbrand GCAdapters
-    const s32 control_transfer_error =
-        libusb_control_transfer(usb_adapter_handle, 0x21, 11, 0x0001, 0, nullptr, 0, 1000);
-    if (control_transfer_error < 0) {
-        LOG_ERROR(Input, "libusb_control_transfer failed with error= {}", control_transfer_error);
-    }
-
-    s32 kernel_driver_error = libusb_kernel_driver_active(usb_adapter_handle, 0);
-    if (kernel_driver_error == 1) {
-        kernel_driver_error = libusb_detach_kernel_driver(usb_adapter_handle, 0);
-        if (kernel_driver_error != 0 && kernel_driver_error != LIBUSB_ERROR_NOT_SUPPORTED) {
-            LOG_ERROR(Input, "libusb_detach_kernel_driver failed with error = {}",
-                      kernel_driver_error);
-        }
-    }
-
-    if (kernel_driver_error && kernel_driver_error != LIBUSB_ERROR_NOT_SUPPORTED) {
-        libusb_close(usb_adapter_handle);
-        usb_adapter_handle = nullptr;
-        return false;
-    }
-
-    const int interface_claim_error = libusb_claim_interface(usb_adapter_handle, 0);
-    if (interface_claim_error) {
-        LOG_ERROR(Input, "libusb_claim_interface failed with error = {}", interface_claim_error);
-        libusb_close(usb_adapter_handle);
-        usb_adapter_handle = nullptr;
-        return false;
-    }
-
-    return true;
-}
-
-bool Adapter::GetGCEndpoint(libusb_device* device) {
-    libusb_config_descriptor* config = nullptr;
-    const int config_descriptor_return = libusb_get_config_descriptor(device, 0, &config);
-    if (config_descriptor_return != LIBUSB_SUCCESS) {
-        LOG_ERROR(Input, "libusb_get_config_descriptor failed with error = {}",
-                  config_descriptor_return);
-        return false;
-    }
-
-    for (u8 ic = 0; ic < config->bNumInterfaces; ic++) {
-        const libusb_interface* interfaceContainer = &config->interface[ic];
-        for (int i = 0; i < interfaceContainer->num_altsetting; i++) {
-            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) != 0) {
-                    input_endpoint = endpoint->bEndpointAddress;
-                } else {
-                    output_endpoint = endpoint->bEndpointAddress;
-                }
-            }
-        }
-    }
-    // This transfer seems to be responsible for clearing the state of the adapter
-    // Used to clear the "busy" state of when the device is unexpectedly unplugged
-    unsigned char clear_payload = 0x13;
-    libusb_interrupt_transfer(usb_adapter_handle, output_endpoint, &clear_payload,
-                              sizeof(clear_payload), nullptr, 16);
-    return true;
-}
-
-void Adapter::JoinThreads() {
-    restart_scan_thread = false;
-    adapter_input_thread_running = false;
-    adapter_scan_thread_running = false;
-
-    if (adapter_scan_thread.joinable()) {
-        adapter_scan_thread.join();
-    }
-
-    if (adapter_input_thread.joinable()) {
-        adapter_input_thread.join();
-    }
-}
-
-void Adapter::ClearLibusbHandle() {
-    if (usb_adapter_handle) {
-        libusb_release_interface(usb_adapter_handle, 1);
-        libusb_close(usb_adapter_handle);
-        usb_adapter_handle = nullptr;
-    }
-}
-
-void Adapter::ResetDevices() {
-    for (std::size_t i = 0; i < pads.size(); ++i) {
-        ResetDevice(i);
-    }
-}
-
-void Adapter::ResetDevice(std::size_t port) {
-    pads[port].type = ControllerTypes::None;
-    pads[port].buttons = 0;
-    pads[port].last_button = PadButton::Undefined;
-    pads[port].axis_values.fill(0);
-    pads[port].axis_origin.fill(255);
-}
-
-std::vector<Common::ParamPackage> Adapter::GetInputDevices() const {
-    std::vector<Common::ParamPackage> devices;
-    for (std::size_t port = 0; port < pads.size(); ++port) {
-        if (!DeviceConnected(port)) {
-            continue;
-        }
-        std::string name = fmt::format("Gamecube Controller {}", port + 1);
-        devices.emplace_back(Common::ParamPackage{
-            {"class", "gcpad"},
-            {"display", std::move(name)},
-            {"port", std::to_string(port)},
-        });
-    }
-    return devices;
-}
-
-bool Adapter::DeviceConnected(std::size_t port) const {
-    return pads[port].type != ControllerTypes::None;
-}
-
-void Adapter::BeginConfiguration() {
-    pad_queue.Clear();
-    configuring = true;
-}
-
-void Adapter::EndConfiguration() {
-    pad_queue.Clear();
-    configuring = false;
-}
-
-Common::SPSCQueue<GCPadStatus>& Adapter::GetPadQueue() {
-    return pad_queue;
-}
-
-const Common::SPSCQueue<GCPadStatus>& Adapter::GetPadQueue() const {
-    return pad_queue;
-}
-
-GCController& Adapter::GetPadState(std::size_t port) {
-    return pads.at(port);
-}
-
-const GCController& Adapter::GetPadState(std::size_t port) const {
-    return pads.at(port);
-}
-
-} // namespace GCAdapter

src/input_common/gcadapter/gc_adapter.h

@@ -1,153 +0,0 @@
-// Copyright 2014 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <algorithm>
-#include <array>
-#include <functional>
-#include <mutex>
-#include <thread>
-#include <vector>
-#include "common/common_types.h"
-#include "common/threadsafe_queue.h"
-
-struct libusb_context;
-struct libusb_device;
-struct libusb_device_handle;
-
-namespace Common {
-class ParamPackage;
-}
-
-namespace GCAdapter {
-
-enum class PadButton {
-    Undefined = 0x0000,
-    ButtonLeft = 0x0001,
-    ButtonRight = 0x0002,
-    ButtonDown = 0x0004,
-    ButtonUp = 0x0008,
-    TriggerZ = 0x0010,
-    TriggerR = 0x0020,
-    TriggerL = 0x0040,
-    ButtonA = 0x0100,
-    ButtonB = 0x0200,
-    ButtonX = 0x0400,
-    ButtonY = 0x0800,
-    ButtonStart = 0x1000,
-    // Below is for compatibility with "AxisButton" type
-    Stick = 0x2000,
-};
-
-enum class PadAxes : u8 {
-    StickX,
-    StickY,
-    SubstickX,
-    SubstickY,
-    TriggerLeft,
-    TriggerRight,
-    Undefined,
-};
-
-enum class ControllerTypes {
-    None,
-    Wired,
-    Wireless,
-};
-
-struct GCPadStatus {
-    std::size_t port{};
-
-    PadButton button{PadButton::Undefined}; // Or-ed PAD_BUTTON_* and PAD_TRIGGER_* bits
-
-    PadAxes axis{PadAxes::Undefined};
-    s16 axis_value{};
-    u8 axis_threshold{50};
-};
-
-struct GCController {
-    ControllerTypes type{};
-    u16 buttons{};
-    PadButton last_button{};
-    std::array<s16, 6> axis_values{};
-    std::array<u8, 6> axis_origin{};
-};
-
-class Adapter {
-public:
-    Adapter();
-    ~Adapter();
-
-    /// Used for polling
-    void BeginConfiguration();
-    void EndConfiguration();
-
-    Common::SPSCQueue<GCPadStatus>& GetPadQueue();
-    const Common::SPSCQueue<GCPadStatus>& GetPadQueue() const;
-
-    GCController& GetPadState(std::size_t port);
-    const GCController& GetPadState(std::size_t port) const;
-
-    /// Returns true if there is a device connected to port
-    bool DeviceConnected(std::size_t port) const;
-
-    std::vector<Common::ParamPackage> GetInputDevices() const;
-
-private:
-    using AdapterPayload = std::array<u8, 37>;
-
-    void UpdatePadType(std::size_t port, ControllerTypes pad_type);
-    void UpdateControllers(const AdapterPayload& adapter_payload);
-    void UpdateSettings(std::size_t port);
-    void UpdateStateButtons(std::size_t port, u8 b1, u8 b2);
-    void UpdateStateAxes(std::size_t port, const AdapterPayload& adapter_payload);
-
-    void AdapterInputThread();
-
-    void AdapterScanThread();
-
-    bool IsPayloadCorrect(const AdapterPayload& adapter_payload, s32 payload_size);
-
-    /// For use in initialization, querying devices to find the adapter
-    void Setup();
-
-    /// Resets status of all GC controller devices to a disconnected state
-    void ResetDevices();
-
-    /// Resets status of device connected to a disconnected state
-    void ResetDevice(std::size_t port);
-
-    /// Returns true if we successfully gain access to GC Adapter
-    bool CheckDeviceAccess();
-
-    /// Captures GC Adapter endpoint address
-    /// Returns true if the endpoint was set correctly
-    bool GetGCEndpoint(libusb_device* device);
-
-    // Join all threads
-    void JoinThreads();
-
-    // Release usb handles
-    void ClearLibusbHandle();
-
-    libusb_device_handle* usb_adapter_handle = nullptr;
-    std::array<GCController, 4> pads;
-    Common::SPSCQueue<GCPadStatus> pad_queue;
-
-    std::thread adapter_input_thread;
-    std::thread adapter_scan_thread;
-    bool adapter_input_thread_running;
-    bool adapter_scan_thread_running;
-    bool restart_scan_thread;
-
-    libusb_context* libusb_ctx;
-
-    u8 input_endpoint{0};
-    u8 output_endpoint{0};
-    u8 input_error_counter{0};
-
-    bool configuring{false};
-};
-} // namespace GCAdapter

src/input_common/gcadapter/gc_poller.cpp

@@ -1,323 +0,0 @@
-// Copyright 2020 yuzu Emulator Project
-// 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"
-#include "common/threadsafe_queue.h"
-#include "input_common/gcadapter/gc_adapter.h"
-#include "input_common/gcadapter/gc_poller.h"
-
-namespace InputCommon {
-namespace {
-constexpr std::array<GCAdapter::PadButton, Settings::NativeButton::NumButtons> gc_to_3ds_mapping{{
-    GCAdapter::PadButton::ButtonA,
-    GCAdapter::PadButton::ButtonB,
-    GCAdapter::PadButton::ButtonX,
-    GCAdapter::PadButton::ButtonY,
-    GCAdapter::PadButton::ButtonUp,
-    GCAdapter::PadButton::ButtonDown,
-    GCAdapter::PadButton::ButtonLeft,
-    GCAdapter::PadButton::ButtonRight,
-    GCAdapter::PadButton::TriggerL,
-    GCAdapter::PadButton::TriggerR,
-    GCAdapter::PadButton::ButtonStart,
-    GCAdapter::PadButton::TriggerZ,
-    GCAdapter::PadButton::Undefined,
-    GCAdapter::PadButton::Undefined,
-    GCAdapter::PadButton::Undefined,
-    GCAdapter::PadButton::Undefined,
-    GCAdapter::PadButton::Undefined,
-}};
-}
-class GCButton final : public Input::ButtonDevice {
-public:
-    explicit GCButton(int port_, int button_, GCAdapter::Adapter* adapter)
-        : port(port_), button(button_), gcadapter(adapter) {}
-
-    ~GCButton() override;
-
-    bool GetStatus() const override {
-        if (gcadapter->DeviceConnected(port)) {
-            return (gcadapter->GetPadState(port).buttons & button) != 0;
-        }
-        return false;
-    }
-
-private:
-    const int port;
-    const int button;
-    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)
-        : port(port_), axis(axis_), threshold(threshold_), trigger_if_greater(trigger_if_greater_),
-          gcadapter(adapter) {}
-
-    bool GetStatus() const override {
-        if (gcadapter->DeviceConnected(port)) {
-            const float current_axis_value = gcadapter->GetPadState(port).axis_values.at(axis);
-            const float axis_value = current_axis_value / 128.0f;
-            if (trigger_if_greater) {
-                return axis_value > threshold;
-            }
-            return axis_value < -threshold;
-        }
-        return false;
-    }
-
-private:
-    const u32 port;
-    const u32 axis;
-    float threshold;
-    bool trigger_if_greater;
-    const GCAdapter::Adapter* gcadapter;
-};
-
-GCButtonFactory::GCButtonFactory(std::shared_ptr<GCAdapter::Adapter> adapter_)
-    : adapter(std::move(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);
-
-    constexpr s32 PAD_STICK_ID = static_cast<s32>(GCAdapter::PadButton::Stick);
-
-    // button is not an axis/stick button
-    if (button_id != PAD_STICK_ID) {
-        return std::make_unique<GCButton>(port, button_id, adapter.get());
-    }
-
-    // For Axis buttons, used by the binary sticks.
-    if (button_id == PAD_STICK_ID) {
-        const int axis = params.Get("axis", 0);
-        const float threshold = params.Get("threshold", 0.25f);
-        const std::string direction_name = params.Get("direction", "");
-        bool trigger_if_greater;
-        if (direction_name == "+") {
-            trigger_if_greater = true;
-        } else if (direction_name == "-") {
-            trigger_if_greater = false;
-        } else {
-            trigger_if_greater = true;
-            LOG_ERROR(Input, "Unknown direction {}", direction_name);
-        }
-        return std::make_unique<GCAxisButton>(port, axis, threshold, trigger_if_greater,
-                                              adapter.get());
-    }
-
-    UNREACHABLE();
-    return nullptr;
-}
-
-Common::ParamPackage GCButtonFactory::GetNextInput() {
-    Common::ParamPackage params;
-    GCAdapter::GCPadStatus pad;
-    auto& queue = adapter->GetPadQueue();
-    while (queue.Pop(pad)) {
-        // This while loop will break on the earliest detected button
-        params.Set("engine", "gcpad");
-        params.Set("port", static_cast<s32>(pad.port));
-        if (pad.button != GCAdapter::PadButton::Undefined) {
-            params.Set("button", static_cast<u16>(pad.button));
-        }
-
-        // For Axis button implementation
-        if (pad.axis != GCAdapter::PadAxes::Undefined) {
-            params.Set("axis", static_cast<u8>(pad.axis));
-            params.Set("button", static_cast<u16>(GCAdapter::PadButton::Stick));
-            params.Set("threshold", "0.25");
-            if (pad.axis_value > 0) {
-                params.Set("direction", "+");
-            } else {
-                params.Set("direction", "-");
-            }
-            break;
-        }
-    }
-    return params;
-}
-
-Common::ParamPackage GCButtonFactory::GetGcTo3DSMappedButton(
-    int port, Settings::NativeButton::Values button) {
-    Common::ParamPackage params({{"engine", "gcpad"}});
-    params.Set("port", port);
-    auto mapped_button = gc_to_3ds_mapping[static_cast<int>(button)];
-    if (mapped_button != GCAdapter::PadButton::Undefined) {
-        params.Set("button", static_cast<u16>(mapped_button));
-    }
-    return params;
-}
-
-void GCButtonFactory::Start() {
-    polling = true;
-    adapter->BeginConfiguration();
-}
-
-void GCButtonFactory::Stop() {
-    polling = false;
-    adapter->EndConfiguration();
-}
-
-class GCAnalog final : public Input::AnalogDevice {
-public:
-    explicit GCAnalog(u32 port_, u32 axis_x_, u32 axis_y_, float deadzone_,
-                      const GCAdapter::Adapter* adapter)
-        : port(port_), axis_x(axis_x_), axis_y(axis_y_), deadzone(deadzone_), gcadapter(adapter) {}
-
-    float GetAxis(u32 axis) const {
-        if (gcadapter->DeviceConnected(port)) {
-            std::lock_guard lock{mutex};
-            const auto axis_value =
-                static_cast<float>(gcadapter->GetPadState(port).axis_values.at(axis));
-            return (axis_value) / 50.0f;
-        }
-        return 0.0f;
-    }
-
-    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.
-        float r = x * x + y * y;
-        if (r > 1.0f) {
-            r = std::sqrt(r);
-            x /= r;
-            y /= r;
-        }
-
-        return {x, y};
-    }
-
-    std::tuple<float, float> GetStatus() const override {
-        const auto [x, y] = GetAnalog(axis_x, axis_y);
-        const float r = std::sqrt((x * x) + (y * y));
-        if (r > deadzone) {
-            return {x / r * (r - deadzone) / (1 - deadzone),
-                    y / r * (r - deadzone) / (1 - deadzone)};
-        }
-        return {0.0f, 0.0f};
-    }
-
-private:
-    const u32 port;
-    const u32 axis_x;
-    const u32 axis_y;
-    const float deadzone;
-    const GCAdapter::Adapter* gcadapter;
-    mutable std::mutex mutex;
-};
-
-/// An analog device factory that creates analog devices from GC Adapter
-GCAnalogFactory::GCAnalogFactory(std::shared_ptr<GCAdapter::Adapter> adapter_)
-    : adapter(std::move(adapter_)) {}
-
-/**
- * Creates analog device from joystick axes
- * @param params contains parameters for creating the device:
- *     - "port": the nth gcpad on the adapter
- *     - "axis_x": the index of the axis to be bind as x-axis
- *     - "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 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);
-
-    return std::make_unique<GCAnalog>(port, axis_x, axis_y, deadzone, adapter.get());
-}
-
-void GCAnalogFactory::Start() {
-    polling = true;
-    adapter->BeginConfiguration();
-}
-
-void GCAnalogFactory::Stop() {
-    polling = false;
-    adapter->EndConfiguration();
-}
-
-Common::ParamPackage GCAnalogFactory::GetNextInput() {
-    GCAdapter::GCPadStatus pad;
-    Common::ParamPackage params;
-    auto& queue = adapter->GetPadQueue();
-    while (queue.Pop(pad)) {
-        if (pad.button != GCAdapter::PadButton::Undefined) {
-            params.Set("engine", "gcpad");
-            params.Set("port", static_cast<s32>(pad.port));
-            params.Set("button", static_cast<u16>(pad.button));
-            return params;
-        }
-        if (pad.axis == GCAdapter::PadAxes::Undefined ||
-            std::abs(static_cast<float>(pad.axis_value) / 128.0f) < 0.1f) {
-            continue;
-        }
-        // An analog device needs two axes, so we need to store the axis for later and wait for
-        // a second input event. The axes also must be from the same joystick.
-        const u8 axis = static_cast<u8>(pad.axis);
-        if (axis == 0 || axis == 1) {
-            analog_x_axis = 0;
-            analog_y_axis = 1;
-            controller_number = static_cast<s32>(pad.port);
-            break;
-        }
-        if (axis == 2 || axis == 3) {
-            analog_x_axis = 2;
-            analog_y_axis = 3;
-            controller_number = static_cast<s32>(pad.port);
-            break;
-        }
-
-        if (analog_x_axis == -1) {
-            analog_x_axis = axis;
-            controller_number = static_cast<s32>(pad.port);
-        } else if (analog_y_axis == -1 && analog_x_axis != axis &&
-                   controller_number == static_cast<s32>(pad.port)) {
-            analog_y_axis = axis;
-            break;
-        }
-    }
-    if (analog_x_axis != -1 && analog_y_axis != -1) {
-        params.Set("engine", "gcpad");
-        params.Set("port", controller_number);
-        params.Set("axis_x", analog_x_axis);
-        params.Set("axis_y", analog_y_axis);
-        analog_x_axis = -1;
-        analog_y_axis = -1;
-        controller_number = -1;
-        return params;
-    }
-    return params;
-}
-
-Common::ParamPackage GCAnalogFactory::GetGcTo3DSMappedAnalog(
-    int port, Settings::NativeAnalog::Values analog) {
-    int x_axis, y_axis;
-    Common::ParamPackage params({{"engine", "gcpad"}});
-    params.Set("port", port);
-    if (analog == Settings::NativeAnalog::Values::CirclePad) {
-        x_axis = static_cast<s32>(GCAdapter::PadAxes::StickX);
-        y_axis = static_cast<s32>(GCAdapter::PadAxes::StickY);
-    } else if (analog == Settings::NativeAnalog::Values::CStick) {
-        x_axis = static_cast<s32>(GCAdapter::PadAxes::SubstickX);
-        y_axis = static_cast<s32>(GCAdapter::PadAxes::SubstickY);
-    } else {
-        LOG_WARNING(Input, "analog value out of range {}", analog);
-        return {{}};
-    }
-    params.Set("axis_x", x_axis);
-    params.Set("axis_y", y_axis);
-    return params;
-}
-
-} // namespace InputCommon

src/input_common/gcadapter/gc_poller.h

@@ -1,70 +0,0 @@
-// Copyright 2020 yuzu Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <memory>
-#include "common/settings.h"
-#include "core/frontend/input.h"
-#include "input_common/gcadapter/gc_adapter.h"
-#include "input_common/main.h"
-
-namespace InputCommon {
-
-/**
- * A button device factory representing a gcpad. It receives gcpad events and forward them
- * to all button devices it created.
- */
-class GCButtonFactory final : public Input::Factory<Input::ButtonDevice>,
-                              public Polling::DevicePoller {
-public:
-public:
-    explicit GCButtonFactory(std::shared_ptr<GCAdapter::Adapter> adapter_);
-
-    std::unique_ptr<Input::ButtonDevice> Create(const Common::ParamPackage& params) override;
-
-    Common::ParamPackage GetNextInput() override;
-    Common::ParamPackage GetGcTo3DSMappedButton(int port, Settings::NativeButton::Values button);
-
-    /// For device input configuration/polling
-    void Start() override;
-    void Stop() override;
-
-    bool IsPolling() const {
-        return polling;
-    }
-
-private:
-    std::shared_ptr<GCAdapter::Adapter> adapter;
-    bool polling{false};
-};
-
-/// An analog device factory that creates analog devices from GC Adapter
-class GCAnalogFactory final : public Input::Factory<Input::AnalogDevice>,
-                              public Polling::DevicePoller {
-public:
-    explicit GCAnalogFactory(std::shared_ptr<GCAdapter::Adapter> adapter_);
-
-    std::unique_ptr<Input::AnalogDevice> Create(const Common::ParamPackage& params) override;
-
-    Common::ParamPackage GetNextInput() override;
-    Common::ParamPackage GetGcTo3DSMappedAnalog(int port, Settings::NativeAnalog::Values analog);
-
-    /// For device input configuration/polling
-    void Start() override;
-    void Stop() override;
-
-    bool IsPolling() const {
-        return polling;
-    }
-
-private:
-    std::shared_ptr<GCAdapter::Adapter> adapter;
-    int analog_x_axis{-1};
-    int analog_y_axis{-1};
-    int controller_number{-1};
-    bool polling{false};
-};
-
-} // namespace InputCommon

src/input_common/helpers/stick_from_buttons.cpp

@@ -0,0 +1,334 @@
+// SPDX-FileCopyrightText: 2017 Citra Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <chrono>
+#include <cmath>
+#include "common/math_util.h"
+#include "common/settings.h"
+#include "input_common/helpers/stick_from_buttons.h"
+
+namespace InputCommon {
+
+class Stick final : public Common::Input::InputDevice {
+public:
+    using Button = std::unique_ptr<Common::Input::InputDevice>;
+
+    Stick(Button up_, Button down_, Button left_, Button right_, Button modifier_,
+          float modifier_scale_, float modifier_angle_)
+        : up(std::move(up_)), down(std::move(down_)), left(std::move(left_)),
+          right(std::move(right_)), modifier(std::move(modifier_)), modifier_scale(modifier_scale_),
+          modifier_angle(modifier_angle_) {
+        up->SetCallback({
+            .on_change =
+                [this](const Common::Input::CallbackStatus& callback_) {
+                    UpdateUpButtonStatus(callback_);
+                },
+        });
+        down->SetCallback({
+            .on_change =
+                [this](const Common::Input::CallbackStatus& callback_) {
+                    UpdateDownButtonStatus(callback_);
+                },
+        });
+        left->SetCallback({
+            .on_change =
+                [this](const Common::Input::CallbackStatus& callback_) {
+                    UpdateLeftButtonStatus(callback_);
+                },
+        });
+        right->SetCallback({
+            .on_change =
+                [this](const Common::Input::CallbackStatus& callback_) {
+                    UpdateRightButtonStatus(callback_);
+                },
+        });
+        modifier->SetCallback({
+            .on_change =
+                [this](const Common::Input::CallbackStatus& callback_) {
+                    UpdateModButtonStatus(callback_);
+                },
+        });
+        last_x_axis_value = 0.0f;
+        last_y_axis_value = 0.0f;
+    }
+
+    bool IsAngleGreater(float old_angle, float new_angle) const {
+        constexpr float TAU = Common::PI * 2.0f;
+        // Use wider angle to ease the transition.
+        constexpr float aperture = TAU * 0.15f;
+        const float top_limit = new_angle + aperture;
+        return (old_angle > new_angle && old_angle <= top_limit) ||
+               (old_angle + TAU > new_angle && old_angle + TAU <= top_limit);
+    }
+
+    bool IsAngleSmaller(float old_angle, float new_angle) const {
+        constexpr float TAU = Common::PI * 2.0f;
+        // Use wider angle to ease the transition.
+        constexpr float aperture = TAU * 0.15f;
+        const float bottom_limit = new_angle - aperture;
+        return (old_angle >= bottom_limit && old_angle < new_angle) ||
+               (old_angle - TAU >= bottom_limit && old_angle - TAU < new_angle);
+    }
+
+    float GetAngle(std::chrono::time_point<std::chrono::steady_clock> now) const {
+        constexpr float TAU = Common::PI * 2.0f;
+        float new_angle = angle;
+
+        auto time_difference = static_cast<float>(
+            std::chrono::duration_cast<std::chrono::microseconds>(now - last_update).count());
+        time_difference /= 1000.0f * 1000.0f;
+        if (time_difference > 0.5f) {
+            time_difference = 0.5f;
+        }
+
+        if (IsAngleGreater(new_angle, goal_angle)) {
+            new_angle -= modifier_angle * time_difference;
+            if (new_angle < 0) {
+                new_angle += TAU;
+            }
+            if (!IsAngleGreater(new_angle, goal_angle)) {
+                return goal_angle;
+            }
+        } else if (IsAngleSmaller(new_angle, goal_angle)) {
+            new_angle += modifier_angle * time_difference;
+            if (new_angle >= TAU) {
+                new_angle -= TAU;
+            }
+            if (!IsAngleSmaller(new_angle, goal_angle)) {
+                return goal_angle;
+            }
+        } else {
+            return goal_angle;
+        }
+        return new_angle;
+    }
+
+    void SetGoalAngle(bool r, bool l, bool u, bool d) {
+        // Move to the right
+        if (r && !u && !d) {
+            goal_angle = 0.0f;
+        }
+
+        // Move to the upper right
+        if (r && u && !d) {
+            goal_angle = Common::PI * 0.25f;
+        }
+
+        // Move up
+        if (u && !l && !r) {
+            goal_angle = Common::PI * 0.5f;
+        }
+
+        // Move to the upper left
+        if (l && u && !d) {
+            goal_angle = Common::PI * 0.75f;
+        }
+
+        // Move to the left
+        if (l && !u && !d) {
+            goal_angle = Common::PI;
+        }
+
+        // Move to the bottom left
+        if (l && !u && d) {
+            goal_angle = Common::PI * 1.25f;
+        }
+
+        // Move down
+        if (d && !l && !r) {
+            goal_angle = Common::PI * 1.5f;
+        }
+
+        // Move to the bottom right
+        if (r && !u && d) {
+            goal_angle = Common::PI * 1.75f;
+        }
+    }
+
+    void UpdateUpButtonStatus(const Common::Input::CallbackStatus& button_callback) {
+        up_status = button_callback.button_status.value;
+        UpdateStatus();
+    }
+
+    void UpdateDownButtonStatus(const Common::Input::CallbackStatus& button_callback) {
+        down_status = button_callback.button_status.value;
+        UpdateStatus();
+    }
+
+    void UpdateLeftButtonStatus(const Common::Input::CallbackStatus& button_callback) {
+        left_status = button_callback.button_status.value;
+        UpdateStatus();
+    }
+
+    void UpdateRightButtonStatus(const Common::Input::CallbackStatus& button_callback) {
+        right_status = button_callback.button_status.value;
+        UpdateStatus();
+    }
+
+    void UpdateModButtonStatus(const Common::Input::CallbackStatus& button_callback) {
+        const auto& new_status = button_callback.button_status;
+        const bool new_button_value = new_status.inverted ? !new_status.value : new_status.value;
+        modifier_status.toggle = new_status.toggle;
+
+        // Update button status with current
+        if (!modifier_status.toggle) {
+            modifier_status.locked = false;
+            if (modifier_status.value != new_button_value) {
+                modifier_status.value = new_button_value;
+            }
+        } else {
+            // Toggle button and lock status
+            if (new_button_value && !modifier_status.locked) {
+                modifier_status.locked = true;
+                modifier_status.value = !modifier_status.value;
+            }
+
+            // Unlock button ready for next press
+            if (!new_button_value && modifier_status.locked) {
+                modifier_status.locked = false;
+            }
+        }
+
+        UpdateStatus();
+    }
+
+    void UpdateStatus() {
+        const float coef = modifier_status.value ? modifier_scale : 1.0f;
+
+        bool r = right_status;
+        bool l = left_status;
+        bool u = up_status;
+        bool d = down_status;
+
+        // Eliminate contradictory movements
+        if (r && l) {
+            r = false;
+            l = false;
+        }
+        if (u && d) {
+            u = false;
+            d = false;
+        }
+
+        // Move if a key is pressed
+        if (r || l || u || d) {
+            amplitude = coef;
+        } else {
+            amplitude = 0;
+        }
+
+        const auto now = std::chrono::steady_clock::now();
+        const auto time_difference = static_cast<u64>(
+            std::chrono::duration_cast<std::chrono::milliseconds>(now - last_update).count());
+
+        if (time_difference < 10) {
+            // Disable analog mode if inputs are too fast
+            SetGoalAngle(r, l, u, d);
+            angle = goal_angle;
+        } else {
+            angle = GetAngle(now);
+            SetGoalAngle(r, l, u, d);
+        }
+
+        last_update = now;
+        Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Stick,
+            .stick_status = GetStatus(),
+        };
+        last_x_axis_value = status.stick_status.x.raw_value;
+        last_y_axis_value = status.stick_status.y.raw_value;
+        TriggerOnChange(status);
+    }
+
+    void ForceUpdate() override {
+        up->ForceUpdate();
+        down->ForceUpdate();
+        left->ForceUpdate();
+        right->ForceUpdate();
+        modifier->ForceUpdate();
+    }
+
+    void SoftUpdate() override {
+        Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Stick,
+            .stick_status = GetStatus(),
+        };
+        if (last_x_axis_value == status.stick_status.x.raw_value &&
+            last_y_axis_value == status.stick_status.y.raw_value) {
+            return;
+        }
+        last_x_axis_value = status.stick_status.x.raw_value;
+        last_y_axis_value = status.stick_status.y.raw_value;
+        TriggerOnChange(status);
+    }
+
+    Common::Input::StickStatus GetStatus() const {
+        Common::Input::StickStatus status{};
+        status.x.properties = properties;
+        status.y.properties = properties;
+        constexpr float SQRT_HALF = 0.707106781f;
+        int x = 0, y = 0;
+        if (right_status) {
+            ++x;
+        }
+        if (left_status) {
+            --x;
+        }
+        if (up_status) {
+            ++y;
+        }
+        if (down_status) {
+            --y;
+        }
+        const float coef = modifier_status.value ? modifier_scale : 1.0f;
+        status.x.raw_value = static_cast<float>(x) * coef * (y == 0 ? 1.0f : SQRT_HALF);
+        status.y.raw_value = static_cast<float>(y) * coef * (x == 0 ? 1.0f : SQRT_HALF);
+        return status;
+    }
+
+private:
+    static constexpr Common::Input::AnalogProperties properties{
+        .deadzone = 0.0f,
+        .range = 1.0f,
+        .threshold = 0.5f,
+        .offset = 0.0f,
+        .inverted = false,
+        .toggle = false,
+    };
+
+    Button up;
+    Button down;
+    Button left;
+    Button right;
+    Button modifier;
+    float modifier_scale{};
+    float modifier_angle{};
+    float angle{};
+    float goal_angle{};
+    float amplitude{};
+    bool up_status{};
+    bool down_status{};
+    bool left_status{};
+    bool right_status{};
+    float last_x_axis_value{};
+    float last_y_axis_value{};
+    Common::Input::ButtonStatus modifier_status{};
+    std::chrono::time_point<std::chrono::steady_clock> last_update;
+};
+
+std::unique_ptr<Common::Input::InputDevice> StickFromButton::Create(
+    const Common::ParamPackage& params) {
+    const std::string null_engine = Common::ParamPackage{{"engine", "null"}}.Serialize();
+    auto up = Common::Input::CreateInputDeviceFromString(params.Get("up", null_engine));
+    auto down = Common::Input::CreateInputDeviceFromString(params.Get("down", null_engine));
+    auto left = Common::Input::CreateInputDeviceFromString(params.Get("left", null_engine));
+    auto right = Common::Input::CreateInputDeviceFromString(params.Get("right", null_engine));
+    auto modifier = Common::Input::CreateInputDeviceFromString(params.Get("modifier", null_engine));
+    auto modifier_scale = params.Get("modifier_scale", 0.5f);
+    auto modifier_angle = params.Get("modifier_angle", 5.5f);
+    return std::make_unique<Stick>(std::move(up), std::move(down), std::move(left),
+                                   std::move(right), std::move(modifier), modifier_scale,
+                                   modifier_angle);
+}
+
+} // namespace InputCommon

src/input_common/helpers/stick_from_buttons.h

@@ -1,11 +1,9 @@
-// Copyright 2017 Citra Emulator Project
+// SPDX-FileCopyrightText: 2017 Citra Emulator Project
-// Licensed under GPLv2 or any later version
+// SPDX-License-Identifier: GPL-2.0-or-later
-// Refer to the license.txt file included.
 
 #pragma once
 
-#include <memory>
+#include "common/input.h"
-#include "core/frontend/input.h"
 
 namespace InputCommon {
 
@@ -13,7 +11,7 @@ namespace InputCommon {
  * An analog device factory that takes direction button devices and combines them into a analog
  * device.
  */
-class AnalogFromButton final : public Input::Factory<Input::AnalogDevice> {
+class StickFromButton final : public Common::Input::Factory<Common::Input::InputDevice> {
 public:
     /**
      * Creates an analog device from direction button devices
@@ -25,7 +23,7 @@ public:
      *     - "modifier": a serialized ParamPackage for creating a button device as the modifier
      *     - "modifier_scale": a float for the multiplier the modifier gives to the position
      */
-    std::unique_ptr<Input::AnalogDevice> Create(const Common::ParamPackage& params) override;
+    std::unique_ptr<Common::Input::InputDevice> Create(const Common::ParamPackage& params) override;
 };
 
 } // namespace InputCommon

src/input_common/helpers/touch_from_buttons.cpp

@@ -0,0 +1,86 @@
+// SPDX-FileCopyrightText: 2020 Citra Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <algorithm>
+#include "common/settings.h"
+#include "input_common/helpers/touch_from_buttons.h"
+
+namespace InputCommon {
+
+class TouchFromButtonDevice final : public Common::Input::InputDevice {
+public:
+    using Button = std::unique_ptr<Common::Input::InputDevice>;
+    TouchFromButtonDevice(Button button_, float x_, float y_)
+        : button(std::move(button_)), x(x_), y(y_) {
+        last_button_value = false;
+        button->SetCallback({
+            .on_change =
+                [this](const Common::Input::CallbackStatus& callback_) {
+                    UpdateButtonStatus(callback_);
+                },
+        });
+        button->ForceUpdate();
+    }
+
+    void ForceUpdate() override {
+        button->ForceUpdate();
+    }
+
+    Common::Input::TouchStatus GetStatus(bool pressed) const {
+        const Common::Input::ButtonStatus button_status{
+            .value = pressed,
+        };
+        Common::Input::TouchStatus status{
+            .pressed = button_status,
+            .x = {},
+            .y = {},
+        };
+        status.x.properties = properties;
+        status.y.properties = properties;
+
+        if (!pressed) {
+            return status;
+        }
+
+        status.x.raw_value = x;
+        status.y.raw_value = y;
+        return status;
+    }
+
+    void UpdateButtonStatus(const Common::Input::CallbackStatus& button_callback) {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Touch,
+            .touch_status = GetStatus(button_callback.button_status.value),
+        };
+        if (last_button_value != button_callback.button_status.value) {
+            last_button_value = button_callback.button_status.value;
+            TriggerOnChange(status);
+        }
+    }
+
+private:
+    static constexpr Common::Input::AnalogProperties properties{
+        .deadzone = 0.0f,
+        .range = 1.0f,
+        .threshold = 0.5f,
+        .offset = 0.0f,
+        .inverted = false,
+        .toggle = false,
+    };
+
+    Button button;
+    bool last_button_value;
+    const float x;
+    const float y;
+};
+
+std::unique_ptr<Common::Input::InputDevice> TouchFromButton::Create(
+    const Common::ParamPackage& params) {
+    const std::string null_engine = Common::ParamPackage{{"engine", "null"}}.Serialize();
+    auto button = Common::Input::CreateInputDeviceFromString(params.Get("button", null_engine));
+    const float x = params.Get("x", 0.0f) / 1280.0f;
+    const float y = params.Get("y", 0.0f) / 720.0f;
+    return std::make_unique<TouchFromButtonDevice>(std::move(button), x, y);
+}
+
+} // namespace InputCommon

src/input_common/helpers/touch_from_buttons.h

@@ -0,0 +1,21 @@
+// SPDX-FileCopyrightText: 2020 Citra Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "common/input.h"
+
+namespace InputCommon {
+
+/**
+ * A touch device factory that takes a list of button devices and combines them into a touch device.
+ */
+class TouchFromButton final : public Common::Input::Factory<Common::Input::InputDevice> {
+public:
+    /**
+     * Creates a touch device from a list of button devices
+     */
+    std::unique_ptr<Common::Input::InputDevice> Create(const Common::ParamPackage& params) override;
+};
+
+} // namespace InputCommon

src/input_common/helpers/udp_protocol.cpp

@@ -1,11 +1,10 @@
-// Copyright 2018 Citra Emulator Project
+// SPDX-FileCopyrightText: 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
+// SPDX-License-Identifier: GPL-2.0-or-later
-// Refer to the license.txt file included.
 
 #include <cstddef>
 #include <cstring>
 #include "common/logging/log.h"
-#include "input_common/udp/protocol.h"
+#include "input_common/helpers/udp_protocol.h"
 
 namespace InputCommon::CemuhookUDP {
 

src/input_common/helpers/udp_protocol.h

@@ -1,14 +1,23 @@
-// Copyright 2018 Citra Emulator Project
+// SPDX-FileCopyrightText: 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
+// SPDX-License-Identifier: GPL-2.0-or-later
-// Refer to the license.txt file included.
 
 #pragma once
 
 #include <array>
 #include <optional>
 #include <type_traits>
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4701) // Potentially uninitialized local variable 'result' used
+#endif
+
 #include <boost/crc.hpp>
-#include "common/bit_field.h"
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
 #include "common/swap.h"
 
 namespace InputCommon::CemuhookUDP {
@@ -52,12 +61,30 @@ struct Message {
 template <typename T>
 constexpr Type GetMessageType();
 
+template <typename T>
+Message<T> CreateMessage(const u32 magic, const T data, const u32 sender_id) {
+    boost::crc_32_type crc;
+    Header header{
+        magic, PROTOCOL_VERSION, sizeof(T) + sizeof(Type), 0, sender_id, GetMessageType<T>(),
+    };
+    Message<T> message{header, data};
+    crc.process_bytes(&message, sizeof(Message<T>));
+    message.header.crc = crc.checksum();
+    return message;
+}
+
 namespace Request {
 
+enum RegisterFlags : u8 {
+    AllPads,
+    PadID,
+    PadMACAdddress,
+};
+
 struct Version {};
 /**
  * Requests the server to send information about what controllers are plugged into the ports
- * In citra's case, we only have one controller, so for simplicity's sake, we can just send a
+ * In yuzu's case, we only have one controller, so for simplicity's sake, we can just send a
  * request explicitly for the first controller port and leave it at that. In the future it would be
  * nice to make this configurable
  */
@@ -75,13 +102,8 @@ static_assert(std::is_trivially_copyable_v<PortInfo>,
  * timeout seems to be 5 seconds.
  */
 struct PadData {
-    enum class Flags : u8 {
-        AllPorts,
-        Id,
-        Mac,
-    };
     /// Determines which method will be used as a look up for the controller
-    Flags flags{};
+    RegisterFlags flags{};
     /// Index of the port of the controller to retrieve data about
     u8 port_id{};
     /// Mac address of the controller to retrieve data about
@@ -93,24 +115,47 @@ static_assert(std::is_trivially_copyable_v<PadData>,
 
 /**
  * Creates a message with the proper header data that can be sent to the server.
- * @param T data Request body to send
+ * @param data Request body to send
  * @param client_id ID of the udp client (usually not checked on the server)
  */
 template <typename T>
 Message<T> Create(const T data, const u32 client_id = 0) {
-    boost::crc_32_type crc;
+    return CreateMessage(CLIENT_MAGIC, data, client_id);
-    Header header{
-        CLIENT_MAGIC, PROTOCOL_VERSION, sizeof(T) + sizeof(Type), 0, client_id, GetMessageType<T>(),
-    };
-    Message<T> message{header, data};
-    crc.process_bytes(&message, sizeof(Message<T>));
-    message.header.crc = crc.checksum();
-    return message;
 }
 } // namespace Request
 
 namespace Response {
 
+enum class ConnectionType : u8 {
+    None,
+    Usb,
+    Bluetooth,
+};
+
+enum class State : u8 {
+    Disconnected,
+    Reserved,
+    Connected,
+};
+
+enum class Model : u8 {
+    None,
+    PartialGyro,
+    FullGyro,
+    Generic,
+};
+
+enum class Battery : u8 {
+    None = 0x00,
+    Dying = 0x01,
+    Low = 0x02,
+    Medium = 0x03,
+    High = 0x04,
+    Full = 0x05,
+    Charging = 0xEE,
+    Charged = 0xEF,
+};
+
 struct Version {
     u16_le version{};
 };
@@ -120,17 +165,25 @@ static_assert(std::is_trivially_copyable_v<Version>,
 
 struct PortInfo {
     u8 id{};
-    u8 state{};
+    State state{};
-    u8 model{};
+    Model model{};
-    u8 connection_type{};
+    ConnectionType connection_type{};
     MacAddress mac;
-    u8 battery{};
+    Battery battery{};
     u8 is_pad_active{};
 };
 static_assert(sizeof(PortInfo) == 12, "UDP Response PortInfo struct has wrong size");
 static_assert(std::is_trivially_copyable_v<PortInfo>,
               "UDP Response PortInfo is not trivially copyable");
 
+struct TouchPad {
+    u8 is_active{};
+    u8 id{};
+    u16_le x{};
+    u16_le y{};
+};
+static_assert(sizeof(TouchPad) == 6, "UDP Response TouchPad struct has wrong size ");
+
 #pragma pack(push, 1)
 struct PadData {
     PortInfo info{};
@@ -167,26 +220,21 @@ struct PadData {
     u8 right_stick_y{};
 
     struct AnalogButton {
-        u8 button_8{};
+        u8 button_dpad_left_analog{};
-        u8 button_7{};
+        u8 button_dpad_down_analog{};
-        u8 button_6{};
+        u8 button_dpad_right_analog{};
-        u8 button_5{};
+        u8 button_dpad_up_analog{};
-        u8 button_12{};
+        u8 button_square_analog{};
-        u8 button_11{};
+        u8 button_cross_analog{};
-        u8 button_10{};
+        u8 button_circle_analog{};
-        u8 button_9{};
+        u8 button_triangle_analog{};
-        u8 button_16{};
+        u8 button_r1_analog{};
-        u8 button_15{};
+        u8 button_l1_analog{};
-        u8 button_14{};
+        u8 trigger_r2{};
-        u8 button_13{};
+        u8 trigger_l2{};
     } analog_button;
 
-    struct TouchPad {
+    std::array<TouchPad, 2> touch;
-        u8 is_active{};
-        u8 id{};
-        u16_le x{};
-        u16_le y{};
-    } touch_1, touch_2;
 
     u64_le motion_timestamp;
 
@@ -213,7 +261,6 @@ static_assert(sizeof(Message<PadData>) == MAX_PACKET_SIZE,
 
 static_assert(sizeof(PadData::AnalogButton) == 12,
               "UDP Response AnalogButton struct has wrong size ");
-static_assert(sizeof(PadData::TouchPad) == 6, "UDP Response TouchPad struct has wrong size ");
 static_assert(sizeof(PadData::Accelerometer) == 12,
               "UDP Response Accelerometer struct has wrong size ");
 static_assert(sizeof(PadData::Gyroscope) == 12, "UDP Response Gyroscope struct has wrong size ");

src/input_common/input_engine.cpp

@@ -0,0 +1,331 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/logging/log.h"
+#include "input_common/input_engine.h"
+
+namespace InputCommon {
+
+void InputEngine::PreSetController(const PadIdentifier& identifier) {
+    std::scoped_lock lock{mutex};
+    controller_list.try_emplace(identifier);
+}
+
+void InputEngine::PreSetButton(const PadIdentifier& identifier, int button) {
+    std::scoped_lock lock{mutex};
+    ControllerData& controller = controller_list.at(identifier);
+    controller.buttons.try_emplace(button, false);
+}
+
+void InputEngine::PreSetHatButton(const PadIdentifier& identifier, int button) {
+    std::scoped_lock lock{mutex};
+    ControllerData& controller = controller_list.at(identifier);
+    controller.hat_buttons.try_emplace(button, u8{0});
+}
+
+void InputEngine::PreSetAxis(const PadIdentifier& identifier, int axis) {
+    std::scoped_lock lock{mutex};
+    ControllerData& controller = controller_list.at(identifier);
+    controller.axes.try_emplace(axis, 0.0f);
+}
+
+void InputEngine::PreSetMotion(const PadIdentifier& identifier, int motion) {
+    std::scoped_lock lock{mutex};
+    ControllerData& controller = controller_list.at(identifier);
+    controller.motions.try_emplace(motion);
+}
+
+void InputEngine::SetButton(const PadIdentifier& identifier, int button, bool value) {
+    {
+        std::scoped_lock lock{mutex};
+        ControllerData& controller = controller_list.at(identifier);
+        if (!configuring) {
+            controller.buttons.insert_or_assign(button, value);
+        }
+    }
+    TriggerOnButtonChange(identifier, button, value);
+}
+
+void InputEngine::SetHatButton(const PadIdentifier& identifier, int button, u8 value) {
+    {
+        std::scoped_lock lock{mutex};
+        ControllerData& controller = controller_list.at(identifier);
+        if (!configuring) {
+            controller.hat_buttons.insert_or_assign(button, value);
+        }
+    }
+    TriggerOnHatButtonChange(identifier, button, value);
+}
+
+void InputEngine::SetAxis(const PadIdentifier& identifier, int axis, f32 value) {
+    {
+        std::scoped_lock lock{mutex};
+        ControllerData& controller = controller_list.at(identifier);
+        if (!configuring) {
+            controller.axes.insert_or_assign(axis, value);
+        }
+    }
+    TriggerOnAxisChange(identifier, axis, value);
+}
+
+void InputEngine::SetMotion(const PadIdentifier& identifier, int motion, const BasicMotion& value) {
+    {
+        std::scoped_lock lock{mutex};
+        ControllerData& controller = controller_list.at(identifier);
+        if (!configuring) {
+            controller.motions.insert_or_assign(motion, value);
+        }
+    }
+    TriggerOnMotionChange(identifier, motion, value);
+}
+
+bool InputEngine::GetButton(const PadIdentifier& identifier, int button) const {
+    std::scoped_lock lock{mutex};
+    const auto controller_iter = controller_list.find(identifier);
+    if (controller_iter == controller_list.cend()) {
+        LOG_ERROR(Input, "Invalid identifier guid={}, pad={}, port={}", identifier.guid.RawString(),
+                  identifier.pad, identifier.port);
+        return false;
+    }
+    const ControllerData& controller = controller_iter->second;
+    const auto button_iter = controller.buttons.find(button);
+    if (button_iter == controller.buttons.cend()) {
+        LOG_ERROR(Input, "Invalid button {}", button);
+        return false;
+    }
+    return button_iter->second;
+}
+
+bool InputEngine::GetHatButton(const PadIdentifier& identifier, int button, u8 direction) const {
+    std::scoped_lock lock{mutex};
+    const auto controller_iter = controller_list.find(identifier);
+    if (controller_iter == controller_list.cend()) {
+        LOG_ERROR(Input, "Invalid identifier guid={}, pad={}, port={}", identifier.guid.RawString(),
+                  identifier.pad, identifier.port);
+        return false;
+    }
+    const ControllerData& controller = controller_iter->second;
+    const auto hat_iter = controller.hat_buttons.find(button);
+    if (hat_iter == controller.hat_buttons.cend()) {
+        LOG_ERROR(Input, "Invalid hat button {}", button);
+        return false;
+    }
+    return (hat_iter->second & direction) != 0;
+}
+
+f32 InputEngine::GetAxis(const PadIdentifier& identifier, int axis) const {
+    std::scoped_lock lock{mutex};
+    const auto controller_iter = controller_list.find(identifier);
+    if (controller_iter == controller_list.cend()) {
+        LOG_ERROR(Input, "Invalid identifier guid={}, pad={}, port={}", identifier.guid.RawString(),
+                  identifier.pad, identifier.port);
+        return 0.0f;
+    }
+    const ControllerData& controller = controller_iter->second;
+    const auto axis_iter = controller.axes.find(axis);
+    if (axis_iter == controller.axes.cend()) {
+        LOG_ERROR(Input, "Invalid axis {}", axis);
+        return 0.0f;
+    }
+    return axis_iter->second;
+}
+
+BasicMotion InputEngine::GetMotion(const PadIdentifier& identifier, int motion) const {
+    std::scoped_lock lock{mutex};
+    const auto controller_iter = controller_list.find(identifier);
+    if (controller_iter == controller_list.cend()) {
+        LOG_ERROR(Input, "Invalid identifier guid={}, pad={}, port={}", identifier.guid.RawString(),
+                  identifier.pad, identifier.port);
+        return {};
+    }
+    const ControllerData& controller = controller_iter->second;
+    return controller.motions.at(motion);
+}
+
+void InputEngine::ResetButtonState() {
+    for (const auto& controller : controller_list) {
+        for (const auto& button : controller.second.buttons) {
+            SetButton(controller.first, button.first, false);
+        }
+        for (const auto& button : controller.second.hat_buttons) {
+            SetHatButton(controller.first, button.first, 0);
+        }
+    }
+}
+
+void InputEngine::ResetAnalogState() {
+    for (const auto& controller : controller_list) {
+        for (const auto& axis : controller.second.axes) {
+            SetAxis(controller.first, axis.first, 0.0);
+        }
+    }
+}
+
+void InputEngine::TriggerOnButtonChange(const PadIdentifier& identifier, int button, bool value) {
+    std::scoped_lock lock{mutex_callback};
+    for (const auto& poller_pair : callback_list) {
+        const InputIdentifier& poller = poller_pair.second;
+        if (!IsInputIdentifierEqual(poller, identifier, EngineInputType::Button, button)) {
+            continue;
+        }
+        if (poller.callback.on_change) {
+            poller.callback.on_change();
+        }
+    }
+    if (!configuring || !mapping_callback.on_data) {
+        return;
+    }
+
+    PreSetButton(identifier, button);
+    if (value == GetButton(identifier, button)) {
+        return;
+    }
+    mapping_callback.on_data(MappingData{
+        .engine = GetEngineName(),
+        .pad = identifier,
+        .type = EngineInputType::Button,
+        .index = button,
+        .button_value = value,
+    });
+}
+
+void InputEngine::TriggerOnHatButtonChange(const PadIdentifier& identifier, int button, u8 value) {
+    std::scoped_lock lock{mutex_callback};
+    for (const auto& poller_pair : callback_list) {
+        const InputIdentifier& poller = poller_pair.second;
+        if (!IsInputIdentifierEqual(poller, identifier, EngineInputType::HatButton, button)) {
+            continue;
+        }
+        if (poller.callback.on_change) {
+            poller.callback.on_change();
+        }
+    }
+    if (!configuring || !mapping_callback.on_data) {
+        return;
+    }
+    for (std::size_t index = 1; index < 0xff; index <<= 1) {
+        bool button_value = (value & index) != 0;
+        if (button_value == GetHatButton(identifier, button, static_cast<u8>(index))) {
+            continue;
+        }
+        mapping_callback.on_data(MappingData{
+            .engine = GetEngineName(),
+            .pad = identifier,
+            .type = EngineInputType::HatButton,
+            .index = button,
+            .hat_name = GetHatButtonName(static_cast<u8>(index)),
+        });
+    }
+}
+
+void InputEngine::TriggerOnAxisChange(const PadIdentifier& identifier, int axis, f32 value) {
+    std::scoped_lock lock{mutex_callback};
+    for (const auto& poller_pair : callback_list) {
+        const InputIdentifier& poller = poller_pair.second;
+        if (!IsInputIdentifierEqual(poller, identifier, EngineInputType::Analog, axis)) {
+            continue;
+        }
+        if (poller.callback.on_change) {
+            poller.callback.on_change();
+        }
+    }
+    if (!configuring || !mapping_callback.on_data) {
+        return;
+    }
+    if (std::abs(value - GetAxis(identifier, axis)) < 0.5f) {
+        return;
+    }
+    mapping_callback.on_data(MappingData{
+        .engine = GetEngineName(),
+        .pad = identifier,
+        .type = EngineInputType::Analog,
+        .index = axis,
+        .axis_value = value,
+    });
+}
+
+void InputEngine::TriggerOnMotionChange(const PadIdentifier& identifier, int motion,
+                                        const BasicMotion& value) {
+    std::scoped_lock lock{mutex_callback};
+    for (const auto& poller_pair : callback_list) {
+        const InputIdentifier& poller = poller_pair.second;
+        if (!IsInputIdentifierEqual(poller, identifier, EngineInputType::Motion, motion)) {
+            continue;
+        }
+        if (poller.callback.on_change) {
+            poller.callback.on_change();
+        }
+    }
+    if (!configuring || !mapping_callback.on_data) {
+        return;
+    }
+    bool is_active = false;
+    if (std::abs(value.accel_x) > 1.5f || std::abs(value.accel_y) > 1.5f ||
+        std::abs(value.accel_z) > 1.5f) {
+        is_active = true;
+    }
+    if (std::abs(value.gyro_x) > 0.6f || std::abs(value.gyro_y) > 0.6f ||
+        std::abs(value.gyro_z) > 0.6f) {
+        is_active = true;
+    }
+    if (!is_active) {
+        return;
+    }
+    mapping_callback.on_data(MappingData{
+        .engine = GetEngineName(),
+        .pad = identifier,
+        .type = EngineInputType::Motion,
+        .index = motion,
+        .motion_value = value,
+    });
+}
+
+bool InputEngine::IsInputIdentifierEqual(const InputIdentifier& input_identifier,
+                                         const PadIdentifier& identifier, EngineInputType type,
+                                         int index) const {
+    if (input_identifier.type != type) {
+        return false;
+    }
+    if (input_identifier.index != index) {
+        return false;
+    }
+    if (input_identifier.identifier != identifier) {
+        return false;
+    }
+    return true;
+}
+
+void InputEngine::BeginConfiguration() {
+    configuring = true;
+}
+
+void InputEngine::EndConfiguration() {
+    configuring = false;
+}
+
+const std::string& InputEngine::GetEngineName() const {
+    return input_engine;
+}
+
+int InputEngine::SetCallback(InputIdentifier input_identifier) {
+    std::scoped_lock lock{mutex_callback};
+    callback_list.insert_or_assign(last_callback_key, std::move(input_identifier));
+    return last_callback_key++;
+}
+
+void InputEngine::SetMappingCallback(MappingCallback callback) {
+    std::scoped_lock lock{mutex_callback};
+    mapping_callback = std::move(callback);
+}
+
+void InputEngine::DeleteCallback(int key) {
+    std::scoped_lock lock{mutex_callback};
+    const auto& iterator = callback_list.find(key);
+    if (iterator == callback_list.end()) {
+        LOG_ERROR(Input, "Tried to delete non-existent callback {}", key);
+        return;
+    }
+    callback_list.erase(iterator);
+}
+
+} // namespace InputCommon

src/input_common/input_engine.h

@@ -0,0 +1,207 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <functional>
+#include <mutex>
+#include <unordered_map>
+
+#include "common/common_types.h"
+#include "common/input.h"
+#include "common/param_package.h"
+#include "common/uuid.h"
+#include "input_common/main.h"
+
+// Pad Identifier of data source
+struct PadIdentifier {
+    Common::UUID guid{};
+    std::size_t port{};
+    std::size_t pad{};
+
+    friend constexpr bool operator==(const PadIdentifier&, const PadIdentifier&) = default;
+};
+
+// Basic motion data containing data from the sensors and a timestamp in microseconds
+struct BasicMotion {
+    float gyro_x{};
+    float gyro_y{};
+    float gyro_z{};
+    float accel_x{};
+    float accel_y{};
+    float accel_z{};
+    u64 delta_timestamp{};
+};
+
+// Types of input that are stored in the engine
+enum class EngineInputType {
+    None,
+    Analog,
+    Button,
+    HatButton,
+    Motion,
+};
+
+namespace std {
+// Hash used to create lists from PadIdentifier data
+template <>
+struct hash<PadIdentifier> {
+    size_t operator()(const PadIdentifier& pad_id) const noexcept {
+        u64 hash_value = pad_id.guid.Hash();
+        hash_value ^= (static_cast<u64>(pad_id.port) << 32);
+        hash_value ^= static_cast<u64>(pad_id.pad);
+        return static_cast<size_t>(hash_value);
+    }
+};
+
+} // namespace std
+
+namespace InputCommon {
+
+// Data from the engine and device needed for creating a ParamPackage
+struct MappingData {
+    std::string engine{};
+    PadIdentifier pad{};
+    EngineInputType type{};
+    int index{};
+    bool button_value{};
+    std::string hat_name{};
+    f32 axis_value{};
+    BasicMotion motion_value{};
+};
+
+// Triggered if data changed on the controller
+struct UpdateCallback {
+    std::function<void()> on_change;
+};
+
+// Triggered if data changed on the controller and the engine is on configuring mode
+struct MappingCallback {
+    std::function<void(const MappingData&)> on_data;
+};
+
+// Input Identifier of data source
+struct InputIdentifier {
+    PadIdentifier identifier;
+    EngineInputType type;
+    int index;
+    UpdateCallback callback;
+};
+
+class InputEngine {
+public:
+    explicit InputEngine(std::string input_engine_) : input_engine{std::move(input_engine_)} {}
+
+    virtual ~InputEngine() = default;
+
+    // Enable configuring mode for mapping
+    void BeginConfiguration();
+
+    // Disable configuring mode for mapping
+    void EndConfiguration();
+
+    // Sets polling mode to a controller
+    virtual Common::Input::PollingError SetPollingMode(
+        [[maybe_unused]] const PadIdentifier& identifier,
+        [[maybe_unused]] const Common::Input::PollingMode polling_mode) {
+        return Common::Input::PollingError::NotSupported;
+    }
+
+    // Returns the engine name
+    [[nodiscard]] const std::string& GetEngineName() const;
+
+    /// Used for automapping features
+    virtual std::vector<Common::ParamPackage> GetInputDevices() const {
+        return {};
+    }
+
+    /// Retrieves the button mappings for the given device
+    virtual ButtonMapping GetButtonMappingForDevice(
+        [[maybe_unused]] const Common::ParamPackage& params) {
+        return {};
+    }
+
+    /// Retrieves the analog mappings for the given device
+    virtual AnalogMapping GetAnalogMappingForDevice(
+        [[maybe_unused]] const Common::ParamPackage& params) {
+        return {};
+    }
+
+    /// Retrieves the motion mappings for the given device
+    virtual MotionMapping GetMotionMappingForDevice(
+        [[maybe_unused]] const Common::ParamPackage& params) {
+        return {};
+    }
+
+    /// Retrieves the name of the given input.
+    virtual Common::Input::ButtonNames GetUIName(
+        [[maybe_unused]] const Common::ParamPackage& params) const {
+        return Common::Input::ButtonNames::Engine;
+    }
+
+    /// Retrieves the index number of the given hat button direction
+    virtual u8 GetHatButtonId([[maybe_unused]] const std::string& direction_name) const {
+        return 0;
+    }
+
+    /// Returns true if axis of a stick aren't mapped in the correct direction
+    virtual bool IsStickInverted([[maybe_unused]] const Common::ParamPackage& params) {
+        return false;
+    }
+
+    void PreSetController(const PadIdentifier& identifier);
+    void PreSetButton(const PadIdentifier& identifier, int button);
+    void PreSetHatButton(const PadIdentifier& identifier, int button);
+    void PreSetAxis(const PadIdentifier& identifier, int axis);
+    void PreSetMotion(const PadIdentifier& identifier, int motion);
+    void ResetButtonState();
+    void ResetAnalogState();
+
+    bool GetButton(const PadIdentifier& identifier, int button) const;
+    bool GetHatButton(const PadIdentifier& identifier, int button, u8 direction) const;
+    f32 GetAxis(const PadIdentifier& identifier, int axis) const;
+    BasicMotion GetMotion(const PadIdentifier& identifier, int motion) const;
+
+    int SetCallback(InputIdentifier input_identifier);
+    void SetMappingCallback(MappingCallback callback);
+    void DeleteCallback(int key);
+
+protected:
+    void SetButton(const PadIdentifier& identifier, int button, bool value);
+    void SetHatButton(const PadIdentifier& identifier, int button, u8 value);
+    void SetAxis(const PadIdentifier& identifier, int axis, f32 value);
+    void SetMotion(const PadIdentifier& identifier, int motion, const BasicMotion& value);
+
+    virtual std::string GetHatButtonName([[maybe_unused]] u8 direction_value) const {
+        return "Unknown";
+    }
+
+private:
+    struct ControllerData {
+        std::unordered_map<int, bool> buttons;
+        std::unordered_map<int, u8> hat_buttons;
+        std::unordered_map<int, float> axes;
+        std::unordered_map<int, BasicMotion> motions;
+    };
+
+    void TriggerOnButtonChange(const PadIdentifier& identifier, int button, bool value);
+    void TriggerOnHatButtonChange(const PadIdentifier& identifier, int button, u8 value);
+    void TriggerOnAxisChange(const PadIdentifier& identifier, int axis, f32 value);
+    void TriggerOnMotionChange(const PadIdentifier& identifier, int motion,
+                               const BasicMotion& value);
+
+    bool IsInputIdentifierEqual(const InputIdentifier& input_identifier,
+                                const PadIdentifier& identifier, EngineInputType type,
+                                int index) const;
+
+    mutable std::mutex mutex;
+    mutable std::mutex mutex_callback;
+    bool configuring{false};
+    const std::string input_engine;
+    int last_callback_key = 0;
+    std::unordered_map<PadIdentifier, ControllerData> controller_list;
+    std::unordered_map<int, InputIdentifier> callback_list;
+    MappingCallback mapping_callback;
+};
+
+} // namespace InputCommon

src/input_common/input_mapping.cpp

@@ -0,0 +1,212 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/settings.h"
+#include "input_common/input_engine.h"
+#include "input_common/input_mapping.h"
+
+namespace InputCommon {
+
+MappingFactory::MappingFactory() = default;
+
+void MappingFactory::BeginMapping(Polling::InputType type) {
+    is_enabled = true;
+    input_type = type;
+    input_queue.Clear();
+    first_axis = -1;
+    second_axis = -1;
+}
+
+Common::ParamPackage MappingFactory::GetNextInput() {
+    Common::ParamPackage input;
+    input_queue.Pop(input);
+    return input;
+}
+
+void MappingFactory::RegisterInput(const MappingData& data) {
+    if (!is_enabled) {
+        return;
+    }
+    if (!IsDriverValid(data)) {
+        return;
+    }
+
+    switch (input_type) {
+    case Polling::InputType::Button:
+        RegisterButton(data);
+        return;
+    case Polling::InputType::Stick:
+        RegisterStick(data);
+        return;
+    case Polling::InputType::Motion:
+        RegisterMotion(data);
+        return;
+    default:
+        return;
+    }
+}
+
+void MappingFactory::StopMapping() {
+    is_enabled = false;
+    input_type = Polling::InputType::None;
+    input_queue.Clear();
+}
+
+void MappingFactory::RegisterButton(const MappingData& data) {
+    Common::ParamPackage new_input;
+    new_input.Set("engine", data.engine);
+    if (data.pad.guid.IsValid()) {
+        new_input.Set("guid", data.pad.guid.RawString());
+    }
+    new_input.Set("port", static_cast<int>(data.pad.port));
+    new_input.Set("pad", static_cast<int>(data.pad.pad));
+
+    switch (data.type) {
+    case EngineInputType::Button:
+        // Workaround for old compatibility
+        if (data.engine == "keyboard") {
+            new_input.Set("code", data.index);
+            break;
+        }
+        new_input.Set("button", data.index);
+        break;
+    case EngineInputType::HatButton:
+        new_input.Set("hat", data.index);
+        new_input.Set("direction", data.hat_name);
+        break;
+    case EngineInputType::Analog:
+        // Ignore mouse axis when mapping buttons
+        if (data.engine == "mouse") {
+            return;
+        }
+        new_input.Set("axis", data.index);
+        new_input.Set("threshold", 0.5f);
+        break;
+    default:
+        return;
+    }
+    input_queue.Push(new_input);
+}
+
+void MappingFactory::RegisterStick(const MappingData& data) {
+    Common::ParamPackage new_input;
+    new_input.Set("engine", data.engine);
+    if (data.pad.guid.IsValid()) {
+        new_input.Set("guid", data.pad.guid.RawString());
+    }
+    new_input.Set("port", static_cast<int>(data.pad.port));
+    new_input.Set("pad", static_cast<int>(data.pad.pad));
+
+    // If engine is mouse map the mouse position as a joystick
+    if (data.engine == "mouse") {
+        new_input.Set("axis_x", 0);
+        new_input.Set("axis_y", 1);
+        new_input.Set("threshold", 0.5f);
+        new_input.Set("range", 1.0f);
+        new_input.Set("deadzone", 0.0f);
+        input_queue.Push(new_input);
+        return;
+    }
+
+    switch (data.type) {
+    case EngineInputType::Button:
+    case EngineInputType::HatButton:
+        RegisterButton(data);
+        return;
+    case EngineInputType::Analog:
+        if (first_axis == data.index) {
+            return;
+        }
+        if (first_axis == -1) {
+            first_axis = data.index;
+            return;
+        }
+        new_input.Set("axis_x", first_axis);
+        new_input.Set("axis_y", data.index);
+        new_input.Set("threshold", 0.5f);
+        new_input.Set("range", 0.95f);
+        new_input.Set("deadzone", 0.15f);
+        break;
+    default:
+        return;
+    }
+    input_queue.Push(new_input);
+}
+
+void MappingFactory::RegisterMotion(const MappingData& data) {
+    Common::ParamPackage new_input;
+    new_input.Set("engine", data.engine);
+    if (data.pad.guid.IsValid()) {
+        new_input.Set("guid", data.pad.guid.RawString());
+    }
+    new_input.Set("port", static_cast<int>(data.pad.port));
+    new_input.Set("pad", static_cast<int>(data.pad.pad));
+
+    // If engine is mouse map the mouse position as 3 axis motion
+    if (data.engine == "mouse") {
+        new_input.Set("axis_x", 1);
+        new_input.Set("invert_x", "-");
+        new_input.Set("axis_y", 0);
+        new_input.Set("axis_z", 4);
+        new_input.Set("range", 1.0f);
+        new_input.Set("deadzone", 0.0f);
+        input_queue.Push(new_input);
+        return;
+    }
+
+    switch (data.type) {
+    case EngineInputType::Button:
+    case EngineInputType::HatButton:
+        RegisterButton(data);
+        return;
+    case EngineInputType::Analog:
+        if (first_axis == data.index) {
+            return;
+        }
+        if (second_axis == data.index) {
+            return;
+        }
+        if (first_axis == -1) {
+            first_axis = data.index;
+            return;
+        }
+        if (second_axis == -1) {
+            second_axis = data.index;
+            return;
+        }
+        new_input.Set("axis_x", first_axis);
+        new_input.Set("axis_y", second_axis);
+        new_input.Set("axis_z", data.index);
+        new_input.Set("range", 1.0f);
+        new_input.Set("deadzone", 0.20f);
+        break;
+    case EngineInputType::Motion:
+        new_input.Set("motion", data.index);
+        break;
+    default:
+        return;
+    }
+    input_queue.Push(new_input);
+}
+
+bool MappingFactory::IsDriverValid(const MappingData& data) const {
+    // Only port 0 can be mapped on the keyboard
+    if (data.engine == "keyboard" && data.pad.port != 0) {
+        return false;
+    }
+    // To prevent mapping with two devices we disable any UDP except motion
+    if (!Settings::values.enable_udp_controller && data.engine == "cemuhookudp" &&
+        data.type != EngineInputType::Motion) {
+        return false;
+    }
+    // The following drivers don't need to be mapped
+    if (data.engine == "touch_from_button") {
+        return false;
+    }
+    if (data.engine == "analog_from_button") {
+        return false;
+    }
+    return true;
+}
+
+} // namespace InputCommon

src/input_common/input_mapping.h

@@ -0,0 +1,88 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include "common/param_package.h"
+#include "common/threadsafe_queue.h"
+
+namespace InputCommon::Polling {
+enum class InputType;
+}
+
+namespace InputCommon {
+class InputEngine;
+struct MappingData;
+
+class MappingFactory {
+public:
+    MappingFactory();
+
+    /**
+     * Resets all variables to begin the mapping process
+     * @param type type of input desired to be returned
+     */
+    void BeginMapping(Polling::InputType type);
+
+    /// Returns an input event with mapping information from the input_queue
+    [[nodiscard]] Common::ParamPackage GetNextInput();
+
+    /**
+     * Registers mapping input data from the driver
+     * @param data A struct containing all the information needed to create a proper
+     *             ParamPackage
+     */
+    void RegisterInput(const MappingData& data);
+
+    /// Stop polling from all backends
+    void StopMapping();
+
+private:
+    /**
+     * If provided data satisfies the requirements it will push an element to the input_queue
+     * Supported input:
+     *     - Button: Creates a basic button ParamPackage
+     *     - HatButton: Creates a basic hat button ParamPackage
+     *     - Analog: Creates a basic analog ParamPackage
+     * @param data A struct containing all the information needed to create a proper
+     * ParamPackage
+     */
+    void RegisterButton(const MappingData& data);
+
+    /**
+     * If provided data satisfies the requirements it will push an element to the input_queue
+     * Supported input:
+     *     - Button, HatButton: Pass the data to RegisterButton
+     *     - Analog: Stores the first axis and on the second axis creates a basic stick ParamPackage
+     * @param data A struct containing all the information needed to create a proper
+     *             ParamPackage
+     */
+    void RegisterStick(const MappingData& data);
+
+    /**
+     * If provided data satisfies the requirements it will push an element to the input_queue
+     * Supported input:
+     *     - Button, HatButton: Pass the data to RegisterButton
+     *     - Analog: Stores the first two axis and on the third axis creates a basic Motion
+     * ParamPackage
+     *     - Motion: Creates a basic Motion ParamPackage
+     * @param data A struct containing all the information needed to create a proper
+     *             ParamPackage
+     */
+    void RegisterMotion(const MappingData& data);
+
+    /**
+     * Returns true if driver can be mapped
+     * @param data A struct containing all the information needed to create a proper
+     *             ParamPackage
+     */
+    bool IsDriverValid(const MappingData& data) const;
+
+    Common::SPSCQueue<Common::ParamPackage> input_queue;
+    Polling::InputType input_type{Polling::InputType::None};
+    bool is_enabled{};
+    int first_axis = -1;
+    int second_axis = -1;
+};
+
+} // namespace InputCommon

src/input_common/input_poller.cpp

@@ -0,0 +1,790 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/common_types.h"
+#include "common/input.h"
+
+#include "input_common/input_engine.h"
+#include "input_common/input_poller.h"
+
+namespace InputCommon {
+
+class DummyInput final : public Common::Input::InputDevice {
+public:
+    explicit DummyInput() = default;
+};
+
+class InputFromButton final : public Common::Input::InputDevice {
+public:
+    explicit InputFromButton(PadIdentifier identifier_, int button_, bool toggle_, bool inverted_,
+                             InputEngine* input_engine_)
+        : identifier(identifier_), button(button_), toggle(toggle_), inverted(inverted_),
+          input_engine(input_engine_) {
+        UpdateCallback engine_callback{[this]() { OnChange(); }};
+        const InputIdentifier input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Button,
+            .index = button,
+            .callback = engine_callback,
+        };
+        last_button_value = false;
+        callback_key = input_engine->SetCallback(input_identifier);
+    }
+
+    ~InputFromButton() override {
+        input_engine->DeleteCallback(callback_key);
+    }
+
+    Common::Input::ButtonStatus GetStatus() const {
+        return {
+            .value = input_engine->GetButton(identifier, button),
+            .inverted = inverted,
+            .toggle = toggle,
+        };
+    }
+
+    void ForceUpdate() override {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Button,
+            .button_status = GetStatus(),
+        };
+
+        last_button_value = status.button_status.value;
+        TriggerOnChange(status);
+    }
+
+    void OnChange() {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Button,
+            .button_status = GetStatus(),
+        };
+
+        if (status.button_status.value != last_button_value) {
+            last_button_value = status.button_status.value;
+            TriggerOnChange(status);
+        }
+    }
+
+private:
+    const PadIdentifier identifier;
+    const int button;
+    const bool toggle;
+    const bool inverted;
+    int callback_key;
+    bool last_button_value;
+    InputEngine* input_engine;
+};
+
+class InputFromHatButton final : public Common::Input::InputDevice {
+public:
+    explicit InputFromHatButton(PadIdentifier identifier_, int button_, u8 direction_, bool toggle_,
+                                bool inverted_, InputEngine* input_engine_)
+        : identifier(identifier_), button(button_), direction(direction_), toggle(toggle_),
+          inverted(inverted_), input_engine(input_engine_) {
+        UpdateCallback engine_callback{[this]() { OnChange(); }};
+        const InputIdentifier input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::HatButton,
+            .index = button,
+            .callback = engine_callback,
+        };
+        last_button_value = false;
+        callback_key = input_engine->SetCallback(input_identifier);
+    }
+
+    ~InputFromHatButton() override {
+        input_engine->DeleteCallback(callback_key);
+    }
+
+    Common::Input::ButtonStatus GetStatus() const {
+        return {
+            .value = input_engine->GetHatButton(identifier, button, direction),
+            .inverted = inverted,
+            .toggle = toggle,
+        };
+    }
+
+    void ForceUpdate() override {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Button,
+            .button_status = GetStatus(),
+        };
+
+        last_button_value = status.button_status.value;
+        TriggerOnChange(status);
+    }
+
+    void OnChange() {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Button,
+            .button_status = GetStatus(),
+        };
+
+        if (status.button_status.value != last_button_value) {
+            last_button_value = status.button_status.value;
+            TriggerOnChange(status);
+        }
+    }
+
+private:
+    const PadIdentifier identifier;
+    const int button;
+    const u8 direction;
+    const bool toggle;
+    const bool inverted;
+    int callback_key;
+    bool last_button_value;
+    InputEngine* input_engine;
+};
+
+class InputFromStick final : public Common::Input::InputDevice {
+public:
+    explicit InputFromStick(PadIdentifier identifier_, int axis_x_, int axis_y_,
+                            Common::Input::AnalogProperties properties_x_,
+                            Common::Input::AnalogProperties properties_y_,
+                            InputEngine* input_engine_)
+        : identifier(identifier_), axis_x(axis_x_), axis_y(axis_y_), properties_x(properties_x_),
+          properties_y(properties_y_),
+          input_engine(input_engine_), invert_axis_y{input_engine_->GetEngineName() == "sdl"} {
+        UpdateCallback engine_callback{[this]() { OnChange(); }};
+        const InputIdentifier x_input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Analog,
+            .index = axis_x,
+            .callback = engine_callback,
+        };
+        const InputIdentifier y_input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Analog,
+            .index = axis_y,
+            .callback = engine_callback,
+        };
+        last_axis_x_value = 0.0f;
+        last_axis_y_value = 0.0f;
+        callback_key_x = input_engine->SetCallback(x_input_identifier);
+        callback_key_y = input_engine->SetCallback(y_input_identifier);
+    }
+
+    ~InputFromStick() override {
+        input_engine->DeleteCallback(callback_key_x);
+        input_engine->DeleteCallback(callback_key_y);
+    }
+
+    Common::Input::StickStatus GetStatus() const {
+        Common::Input::StickStatus status;
+        status.x = {
+            .raw_value = input_engine->GetAxis(identifier, axis_x),
+            .properties = properties_x,
+        };
+        status.y = {
+            .raw_value = input_engine->GetAxis(identifier, axis_y),
+            .properties = properties_y,
+        };
+        // This is a workaround to keep compatibility with old yuzu versions. Vertical axis is
+        // inverted on SDL compared to Nintendo
+        if (invert_axis_y) {
+            status.y.raw_value = -status.y.raw_value;
+        }
+        return status;
+    }
+
+    void ForceUpdate() override {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Stick,
+            .stick_status = GetStatus(),
+        };
+
+        last_axis_x_value = status.stick_status.x.raw_value;
+        last_axis_y_value = status.stick_status.y.raw_value;
+        TriggerOnChange(status);
+    }
+
+    void OnChange() {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Stick,
+            .stick_status = GetStatus(),
+        };
+
+        if (status.stick_status.x.raw_value != last_axis_x_value ||
+            status.stick_status.y.raw_value != last_axis_y_value) {
+            last_axis_x_value = status.stick_status.x.raw_value;
+            last_axis_y_value = status.stick_status.y.raw_value;
+            TriggerOnChange(status);
+        }
+    }
+
+private:
+    const PadIdentifier identifier;
+    const int axis_x;
+    const int axis_y;
+    const Common::Input::AnalogProperties properties_x;
+    const Common::Input::AnalogProperties properties_y;
+    int callback_key_x;
+    int callback_key_y;
+    float last_axis_x_value;
+    float last_axis_y_value;
+    InputEngine* input_engine;
+    const bool invert_axis_y;
+};
+
+class InputFromTouch final : public Common::Input::InputDevice {
+public:
+    explicit InputFromTouch(PadIdentifier identifier_, int button_, bool toggle_, bool inverted_,
+                            int axis_x_, int axis_y_, Common::Input::AnalogProperties properties_x_,
+                            Common::Input::AnalogProperties properties_y_,
+                            InputEngine* input_engine_)
+        : identifier(identifier_), button(button_), toggle(toggle_), inverted(inverted_),
+          axis_x(axis_x_), axis_y(axis_y_), properties_x(properties_x_),
+          properties_y(properties_y_), input_engine(input_engine_) {
+        UpdateCallback engine_callback{[this]() { OnChange(); }};
+        const InputIdentifier button_input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Button,
+            .index = button,
+            .callback = engine_callback,
+        };
+        const InputIdentifier x_input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Analog,
+            .index = axis_x,
+            .callback = engine_callback,
+        };
+        const InputIdentifier y_input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Analog,
+            .index = axis_y,
+            .callback = engine_callback,
+        };
+        last_axis_x_value = 0.0f;
+        last_axis_y_value = 0.0f;
+        last_button_value = false;
+        callback_key_button = input_engine->SetCallback(button_input_identifier);
+        callback_key_x = input_engine->SetCallback(x_input_identifier);
+        callback_key_y = input_engine->SetCallback(y_input_identifier);
+    }
+
+    ~InputFromTouch() override {
+        input_engine->DeleteCallback(callback_key_button);
+        input_engine->DeleteCallback(callback_key_x);
+        input_engine->DeleteCallback(callback_key_y);
+    }
+
+    Common::Input::TouchStatus GetStatus() const {
+        Common::Input::TouchStatus status{};
+        status.pressed = {
+            .value = input_engine->GetButton(identifier, button),
+            .inverted = inverted,
+            .toggle = toggle,
+        };
+        status.x = {
+            .raw_value = input_engine->GetAxis(identifier, axis_x),
+            .properties = properties_x,
+        };
+        status.y = {
+            .raw_value = input_engine->GetAxis(identifier, axis_y),
+            .properties = properties_y,
+        };
+        return status;
+    }
+
+    void OnChange() {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Touch,
+            .touch_status = GetStatus(),
+        };
+
+        if (status.touch_status.x.raw_value != last_axis_x_value ||
+            status.touch_status.y.raw_value != last_axis_y_value ||
+            status.touch_status.pressed.value != last_button_value) {
+            last_axis_x_value = status.touch_status.x.raw_value;
+            last_axis_y_value = status.touch_status.y.raw_value;
+            last_button_value = status.touch_status.pressed.value;
+            TriggerOnChange(status);
+        }
+    }
+
+private:
+    const PadIdentifier identifier;
+    const int button;
+    const bool toggle;
+    const bool inverted;
+    const int axis_x;
+    const int axis_y;
+    const Common::Input::AnalogProperties properties_x;
+    const Common::Input::AnalogProperties properties_y;
+    int callback_key_button;
+    int callback_key_x;
+    int callback_key_y;
+    bool last_button_value;
+    float last_axis_x_value;
+    float last_axis_y_value;
+    InputEngine* input_engine;
+};
+
+class InputFromAnalog final : public Common::Input::InputDevice {
+public:
+    explicit InputFromAnalog(PadIdentifier identifier_, int axis_,
+                             Common::Input::AnalogProperties properties_,
+                             InputEngine* input_engine_)
+        : identifier(identifier_), axis(axis_), properties(properties_),
+          input_engine(input_engine_) {
+        UpdateCallback engine_callback{[this]() { OnChange(); }};
+        const InputIdentifier input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Analog,
+            .index = axis,
+            .callback = engine_callback,
+        };
+        last_axis_value = 0.0f;
+        callback_key = input_engine->SetCallback(input_identifier);
+    }
+
+    ~InputFromAnalog() override {
+        input_engine->DeleteCallback(callback_key);
+    }
+
+    Common::Input::AnalogStatus GetStatus() const {
+        return {
+            .raw_value = input_engine->GetAxis(identifier, axis),
+            .properties = properties,
+        };
+    }
+
+    void OnChange() {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Analog,
+            .analog_status = GetStatus(),
+        };
+
+        if (status.analog_status.raw_value != last_axis_value) {
+            last_axis_value = status.analog_status.raw_value;
+            TriggerOnChange(status);
+        }
+    }
+
+private:
+    const PadIdentifier identifier;
+    const int axis;
+    const Common::Input::AnalogProperties properties;
+    int callback_key;
+    float last_axis_value;
+    InputEngine* input_engine;
+};
+
+class InputFromMotion final : public Common::Input::InputDevice {
+public:
+    explicit InputFromMotion(PadIdentifier identifier_, int motion_sensor_, float gyro_threshold_,
+                             InputEngine* input_engine_)
+        : identifier(identifier_), motion_sensor(motion_sensor_), gyro_threshold(gyro_threshold_),
+          input_engine(input_engine_) {
+        UpdateCallback engine_callback{[this]() { OnChange(); }};
+        const InputIdentifier input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Motion,
+            .index = motion_sensor,
+            .callback = engine_callback,
+        };
+        callback_key = input_engine->SetCallback(input_identifier);
+    }
+
+    ~InputFromMotion() override {
+        input_engine->DeleteCallback(callback_key);
+    }
+
+    Common::Input::MotionStatus GetStatus() const {
+        const auto basic_motion = input_engine->GetMotion(identifier, motion_sensor);
+        Common::Input::MotionStatus status{};
+        const Common::Input::AnalogProperties properties = {
+            .deadzone = 0.0f,
+            .range = 1.0f,
+            .threshold = gyro_threshold,
+            .offset = 0.0f,
+        };
+        status.accel.x = {.raw_value = basic_motion.accel_x, .properties = properties};
+        status.accel.y = {.raw_value = basic_motion.accel_y, .properties = properties};
+        status.accel.z = {.raw_value = basic_motion.accel_z, .properties = properties};
+        status.gyro.x = {.raw_value = basic_motion.gyro_x, .properties = properties};
+        status.gyro.y = {.raw_value = basic_motion.gyro_y, .properties = properties};
+        status.gyro.z = {.raw_value = basic_motion.gyro_z, .properties = properties};
+        status.delta_timestamp = basic_motion.delta_timestamp;
+        return status;
+    }
+
+    void OnChange() {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Motion,
+            .motion_status = GetStatus(),
+        };
+
+        TriggerOnChange(status);
+    }
+
+private:
+    const PadIdentifier identifier;
+    const int motion_sensor;
+    const float gyro_threshold;
+    int callback_key;
+    InputEngine* input_engine;
+};
+
+class InputFromAxisMotion final : public Common::Input::InputDevice {
+public:
+    explicit InputFromAxisMotion(PadIdentifier identifier_, int axis_x_, int axis_y_, int axis_z_,
+                                 Common::Input::AnalogProperties properties_x_,
+                                 Common::Input::AnalogProperties properties_y_,
+                                 Common::Input::AnalogProperties properties_z_,
+                                 InputEngine* input_engine_)
+        : identifier(identifier_), axis_x(axis_x_), axis_y(axis_y_), axis_z(axis_z_),
+          properties_x(properties_x_), properties_y(properties_y_), properties_z(properties_z_),
+          input_engine(input_engine_) {
+        UpdateCallback engine_callback{[this]() { OnChange(); }};
+        const InputIdentifier x_input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Analog,
+            .index = axis_x,
+            .callback = engine_callback,
+        };
+        const InputIdentifier y_input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Analog,
+            .index = axis_y,
+            .callback = engine_callback,
+        };
+        const InputIdentifier z_input_identifier{
+            .identifier = identifier,
+            .type = EngineInputType::Analog,
+            .index = axis_z,
+            .callback = engine_callback,
+        };
+        last_axis_x_value = 0.0f;
+        last_axis_y_value = 0.0f;
+        last_axis_z_value = 0.0f;
+        callback_key_x = input_engine->SetCallback(x_input_identifier);
+        callback_key_y = input_engine->SetCallback(y_input_identifier);
+        callback_key_z = input_engine->SetCallback(z_input_identifier);
+    }
+
+    ~InputFromAxisMotion() override {
+        input_engine->DeleteCallback(callback_key_x);
+        input_engine->DeleteCallback(callback_key_y);
+        input_engine->DeleteCallback(callback_key_z);
+    }
+
+    Common::Input::MotionStatus GetStatus() const {
+        Common::Input::MotionStatus status{};
+        status.gyro.x = {
+            .raw_value = input_engine->GetAxis(identifier, axis_x),
+            .properties = properties_x,
+        };
+        status.gyro.y = {
+            .raw_value = input_engine->GetAxis(identifier, axis_y),
+            .properties = properties_y,
+        };
+        status.gyro.z = {
+            .raw_value = input_engine->GetAxis(identifier, axis_z),
+            .properties = properties_z,
+        };
+        status.delta_timestamp = 5000;
+        status.force_update = true;
+        return status;
+    }
+
+    void ForceUpdate() override {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Motion,
+            .motion_status = GetStatus(),
+        };
+
+        last_axis_x_value = status.motion_status.gyro.x.raw_value;
+        last_axis_y_value = status.motion_status.gyro.y.raw_value;
+        last_axis_z_value = status.motion_status.gyro.z.raw_value;
+        TriggerOnChange(status);
+    }
+
+    void OnChange() {
+        const Common::Input::CallbackStatus status{
+            .type = Common::Input::InputType::Motion,
+            .motion_status = GetStatus(),
+        };
+
+        if (status.motion_status.gyro.x.raw_value != last_axis_x_value ||
+            status.motion_status.gyro.y.raw_value != last_axis_y_value ||
+            status.motion_status.gyro.z.raw_value != last_axis_z_value) {
+            last_axis_x_value = status.motion_status.gyro.x.raw_value;
+            last_axis_y_value = status.motion_status.gyro.y.raw_value;
+            last_axis_z_value = status.motion_status.gyro.z.raw_value;
+            TriggerOnChange(status);
+        }
+    }
+
+private:
+    const PadIdentifier identifier;
+    const int axis_x;
+    const int axis_y;
+    const int axis_z;
+    const Common::Input::AnalogProperties properties_x;
+    const Common::Input::AnalogProperties properties_y;
+    const Common::Input::AnalogProperties properties_z;
+    int callback_key_x;
+    int callback_key_y;
+    int callback_key_z;
+    float last_axis_x_value;
+    float last_axis_y_value;
+    float last_axis_z_value;
+    InputEngine* input_engine;
+};
+
+class OutputFromIdentifier final : public Common::Input::OutputDevice {
+public:
+    explicit OutputFromIdentifier(PadIdentifier identifier_, InputEngine* input_engine_)
+        : identifier(identifier_), input_engine(input_engine_) {}
+
+    Common::Input::PollingError SetPollingMode(Common::Input::PollingMode polling_mode) override {
+        return input_engine->SetPollingMode(identifier, polling_mode);
+    }
+
+private:
+    const PadIdentifier identifier;
+    InputEngine* input_engine;
+};
+
+std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateButtonDevice(
+    const Common::ParamPackage& params) {
+    const PadIdentifier identifier = {
+        .guid = Common::UUID{params.Get("guid", "")},
+        .port = static_cast<std::size_t>(params.Get("port", 0)),
+        .pad = static_cast<std::size_t>(params.Get("pad", 0)),
+    };
+
+    const auto button_id = params.Get("button", 0);
+    const auto keyboard_key = params.Get("code", 0);
+    const auto toggle = params.Get("toggle", false) != 0;
+    const auto inverted = params.Get("inverted", false) != 0;
+    input_engine->PreSetController(identifier);
+    input_engine->PreSetButton(identifier, button_id);
+    input_engine->PreSetButton(identifier, keyboard_key);
+    if (keyboard_key != 0) {
+        return std::make_unique<InputFromButton>(identifier, keyboard_key, toggle, inverted,
+                                                 input_engine.get());
+    }
+    return std::make_unique<InputFromButton>(identifier, button_id, toggle, inverted,
+                                             input_engine.get());
+}
+
+std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateHatButtonDevice(
+    const Common::ParamPackage& params) {
+    const PadIdentifier identifier = {
+        .guid = Common::UUID{params.Get("guid", "")},
+        .port = static_cast<std::size_t>(params.Get("port", 0)),
+        .pad = static_cast<std::size_t>(params.Get("pad", 0)),
+    };
+
+    const auto button_id = params.Get("hat", 0);
+    const auto direction = input_engine->GetHatButtonId(params.Get("direction", ""));
+    const auto toggle = params.Get("toggle", false) != 0;
+    const auto inverted = params.Get("inverted", false) != 0;
+
+    input_engine->PreSetController(identifier);
+    input_engine->PreSetHatButton(identifier, button_id);
+    return std::make_unique<InputFromHatButton>(identifier, button_id, direction, toggle, inverted,
+                                                input_engine.get());
+}
+
+std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateStickDevice(
+    const Common::ParamPackage& params) {
+    const auto deadzone = std::clamp(params.Get("deadzone", 0.15f), 0.0f, 1.0f);
+    const auto range = std::clamp(params.Get("range", 0.95f), 0.25f, 1.50f);
+    const auto threshold = std::clamp(params.Get("threshold", 0.5f), 0.0f, 1.0f);
+    const PadIdentifier identifier = {
+        .guid = Common::UUID{params.Get("guid", "")},
+        .port = static_cast<std::size_t>(params.Get("port", 0)),
+        .pad = static_cast<std::size_t>(params.Get("pad", 0)),
+    };
+
+    const auto axis_x = params.Get("axis_x", 0);
+    const Common::Input::AnalogProperties properties_x = {
+        .deadzone = deadzone,
+        .range = range,
+        .threshold = threshold,
+        .offset = std::clamp(params.Get("offset_x", 0.0f), -1.0f, 1.0f),
+        .inverted = params.Get("invert_x", "+") == "-",
+    };
+
+    const auto axis_y = params.Get("axis_y", 1);
+    const Common::Input::AnalogProperties properties_y = {
+        .deadzone = deadzone,
+        .range = range,
+        .threshold = threshold,
+        .offset = std::clamp(params.Get("offset_y", 0.0f), -1.0f, 1.0f),
+        .inverted = params.Get("invert_y", "+") != "+",
+    };
+    input_engine->PreSetController(identifier);
+    input_engine->PreSetAxis(identifier, axis_x);
+    input_engine->PreSetAxis(identifier, axis_y);
+    return std::make_unique<InputFromStick>(identifier, axis_x, axis_y, properties_x, properties_y,
+                                            input_engine.get());
+}
+
+std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateAnalogDevice(
+    const Common::ParamPackage& params) {
+    const PadIdentifier identifier = {
+        .guid = Common::UUID{params.Get("guid", "")},
+        .port = static_cast<std::size_t>(params.Get("port", 0)),
+        .pad = static_cast<std::size_t>(params.Get("pad", 0)),
+    };
+
+    const auto axis = params.Get("axis", 0);
+    const Common::Input::AnalogProperties properties = {
+        .deadzone = std::clamp(params.Get("deadzone", 0.0f), 0.0f, 1.0f),
+        .range = std::clamp(params.Get("range", 1.0f), 0.25f, 1.50f),
+        .threshold = std::clamp(params.Get("threshold", 0.5f), 0.0f, 1.0f),
+        .offset = std::clamp(params.Get("offset", 0.0f), -1.0f, 1.0f),
+        .inverted = params.Get("invert", "+") == "-",
+        .toggle = params.Get("toggle", false) != 0,
+    };
+    input_engine->PreSetController(identifier);
+    input_engine->PreSetAxis(identifier, axis);
+    return std::make_unique<InputFromAnalog>(identifier, axis, properties, input_engine.get());
+}
+
+std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateTouchDevice(
+    const Common::ParamPackage& params) {
+    const auto deadzone = std::clamp(params.Get("deadzone", 0.0f), 0.0f, 1.0f);
+    const auto range = std::clamp(params.Get("range", 1.0f), 0.25f, 1.50f);
+    const auto threshold = std::clamp(params.Get("threshold", 0.5f), 0.0f, 1.0f);
+    const PadIdentifier identifier = {
+        .guid = Common::UUID{params.Get("guid", "")},
+        .port = static_cast<std::size_t>(params.Get("port", 0)),
+        .pad = static_cast<std::size_t>(params.Get("pad", 0)),
+    };
+
+    const auto button = params.Get("button", 0);
+    const auto toggle = params.Get("toggle", false) != 0;
+    const auto inverted = params.Get("inverted", false) != 0;
+
+    const auto axis_x = params.Get("axis_x", 0);
+    const Common::Input::AnalogProperties properties_x = {
+        .deadzone = deadzone,
+        .range = range,
+        .threshold = threshold,
+        .offset = std::clamp(params.Get("offset_x", 0.0f), -1.0f, 1.0f),
+        .inverted = params.Get("invert_x", "+") == "-",
+    };
+
+    const auto axis_y = params.Get("axis_y", 1);
+    const Common::Input::AnalogProperties properties_y = {
+        .deadzone = deadzone,
+        .range = range,
+        .threshold = threshold,
+        .offset = std::clamp(params.Get("offset_y", 0.0f), -1.0f, 1.0f),
+        .inverted = params.Get("invert_y", false) != 0,
+    };
+    input_engine->PreSetController(identifier);
+    input_engine->PreSetAxis(identifier, axis_x);
+    input_engine->PreSetAxis(identifier, axis_y);
+    input_engine->PreSetButton(identifier, button);
+    return std::make_unique<InputFromTouch>(identifier, button, toggle, inverted, axis_x, axis_y,
+                                            properties_x, properties_y, input_engine.get());
+}
+
+std::unique_ptr<Common::Input::InputDevice> InputFactory::CreateMotionDevice(
+    Common::ParamPackage params) {
+    const PadIdentifier identifier = {
+        .guid = Common::UUID{params.Get("guid", "")},
+        .port = static_cast<std::size_t>(params.Get("port", 0)),
+        .pad = static_cast<std::size_t>(params.Get("pad", 0)),
+    };
+
+    if (params.Has("motion")) {
+        const auto motion_sensor = params.Get("motion", 0);
+        const auto gyro_threshold = params.Get("threshold", 0.007f);
+        input_engine->PreSetController(identifier);
+        input_engine->PreSetMotion(identifier, motion_sensor);
+        return std::make_unique<InputFromMotion>(identifier, motion_sensor, gyro_threshold,
+                                                 input_engine.get());
+    }
+
+    const auto deadzone = std::clamp(params.Get("deadzone", 0.15f), 0.0f, 1.0f);
+    const auto range = std::clamp(params.Get("range", 1.0f), 0.25f, 1.50f);
+    const auto threshold = std::clamp(params.Get("threshold", 0.5f), 0.0f, 1.0f);
+
+    const auto axis_x = params.Get("axis_x", 0);
+    const Common::Input::AnalogProperties properties_x = {
+        .deadzone = deadzone,
+        .range = range,
+        .threshold = threshold,
+        .offset = std::clamp(params.Get("offset_x", 0.0f), -1.0f, 1.0f),
+        .inverted = params.Get("invert_x", "+") == "-",
+    };
+
+    const auto axis_y = params.Get("axis_y", 1);
+    const Common::Input::AnalogProperties properties_y = {
+        .deadzone = deadzone,
+        .range = range,
+        .threshold = threshold,
+        .offset = std::clamp(params.Get("offset_y", 0.0f), -1.0f, 1.0f),
+        .inverted = params.Get("invert_y", "+") != "+",
+    };
+
+    const auto axis_z = params.Get("axis_z", 1);
+    const Common::Input::AnalogProperties properties_z = {
+        .deadzone = deadzone,
+        .range = range,
+        .threshold = threshold,
+        .offset = std::clamp(params.Get("offset_z", 0.0f), -1.0f, 1.0f),
+        .inverted = params.Get("invert_z", "+") != "+",
+    };
+    input_engine->PreSetController(identifier);
+    input_engine->PreSetAxis(identifier, axis_x);
+    input_engine->PreSetAxis(identifier, axis_y);
+    input_engine->PreSetAxis(identifier, axis_z);
+    return std::make_unique<InputFromAxisMotion>(identifier, axis_x, axis_y, axis_z, properties_x,
+                                                 properties_y, properties_z, input_engine.get());
+}
+
+InputFactory::InputFactory(std::shared_ptr<InputEngine> input_engine_)
+    : input_engine(std::move(input_engine_)) {}
+
+std::unique_ptr<Common::Input::InputDevice> InputFactory::Create(
+    const Common::ParamPackage& params) {
+    if (params.Has("button") && params.Has("axis_x") && params.Has("axis_y")) {
+        return CreateTouchDevice(params);
+    }
+    if (params.Has("button") || params.Has("code")) {
+        return CreateButtonDevice(params);
+    }
+    if (params.Has("hat")) {
+        return CreateHatButtonDevice(params);
+    }
+    if (params.Has("axis_x") && params.Has("axis_y") && params.Has("axis_z")) {
+        return CreateMotionDevice(params);
+    }
+    if (params.Has("motion")) {
+        return CreateMotionDevice(params);
+    }
+    if (params.Has("axis_x") && params.Has("axis_y")) {
+        return CreateStickDevice(params);
+    }
+    if (params.Has("axis")) {
+        return CreateAnalogDevice(params);
+    }
+    LOG_ERROR(Input, "Invalid parameters given");
+    return std::make_unique<DummyInput>();
+}
+
+OutputFactory::OutputFactory(std::shared_ptr<InputEngine> input_engine_)
+    : input_engine(std::move(input_engine_)) {}
+
+std::unique_ptr<Common::Input::OutputDevice> OutputFactory::Create(
+    const Common::ParamPackage& params) {
+    const PadIdentifier identifier = {
+        .guid = Common::UUID{params.Get("guid", "")},
+        .port = static_cast<std::size_t>(params.Get("port", 0)),
+        .pad = static_cast<std::size_t>(params.Get("pad", 0)),
+    };
+
+    input_engine->PreSetController(identifier);
+    return std::make_unique<OutputFromIdentifier>(identifier, input_engine.get());
+}
+
+} // namespace InputCommon

src/input_common/input_poller.h

@@ -0,0 +1,181 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+namespace Input {
+class InputDevice;
+
+template <typename InputDevice>
+class Factory;
+}; // namespace Input
+
+namespace InputCommon {
+class InputEngine;
+
+class OutputFactory final : public Common::Input::Factory<Common::Input::OutputDevice> {
+public:
+    explicit OutputFactory(std::shared_ptr<InputEngine> input_engine_);
+
+    /**
+     * Creates an output device from the parameters given.
+     * @param params contains parameters for creating the device:
+     *               - "guid" text string for identifying controllers
+     *               - "port": port of the connected device
+     *               - "pad": slot of the connected controller
+     * @returns a unique output device with the parameters specified
+     */
+    std::unique_ptr<Common::Input::OutputDevice> Create(
+        const Common::ParamPackage& params) override;
+
+private:
+    std::shared_ptr<InputEngine> input_engine;
+};
+
+/**
+ * An Input factory. It receives input events and forward them to all input devices it created.
+ */
+class InputFactory final : public Common::Input::Factory<Common::Input::InputDevice> {
+public:
+    explicit InputFactory(std::shared_ptr<InputEngine> input_engine_);
+
+    /**
+     * Creates an input device from the parameters given. Identifies the type of input to be
+     * returned if it contains the following parameters:
+     * - button: Contains "button" or "code"
+     * - hat_button: Contains "hat"
+     * - analog: Contains "axis"
+     * - stick: Contains "axis_x" and "axis_y"
+     * - motion: Contains "axis_x", "axis_y" and "axis_z"
+     * - motion: Contains "motion"
+     * - touch: Contains "button", "axis_x" and "axis_y"
+     * - output: Contains "output"
+     * @param params contains parameters for creating the device:
+     *               - "code": the code of the keyboard key to bind with the input
+     *               - "button": same as "code" but for controller buttons
+     *               - "hat": similar as "button" but it's a group of hat buttons from SDL
+     *               - "axis": the axis number of the axis to bind with the input
+     *               - "motion": the motion number of the motion to bind with the input
+     *               - "axis_x": same as axis but specifying horizontal direction
+     *               - "axis_y": same as axis but specifying vertical direction
+     *               - "axis_z": same as axis but specifying forward direction
+     * @returns a unique input device with the parameters specified
+     */
+    std::unique_ptr<Common::Input::InputDevice> Create(const Common::ParamPackage& params) override;
+
+private:
+    /**
+     * Creates a button device from the parameters given.
+     * @param params contains parameters for creating the device:
+     *               - "code": the code of the keyboard key to bind with the input
+     *               - "button": same as "code" but for controller buttons
+     *               - "toggle": press once to enable, press again to disable
+     *               - "inverted": inverts the output of the button
+     *               - "guid": text string for identifying controllers
+     *               - "port": port of the connected device
+     *               - "pad": slot of the connected controller
+     * @returns a unique input device with the parameters specified
+     */
+    std::unique_ptr<Common::Input::InputDevice> CreateButtonDevice(
+        const Common::ParamPackage& params);
+
+    /**
+     * Creates a hat button device from the parameters given.
+     * @param params contains parameters for creating the device:
+     *               - "button": the controller hat id to bind with the input
+     *               - "direction": the direction id to be detected
+     *               - "toggle": press once to enable, press again to disable
+     *               - "inverted": inverts the output of the button
+     *               - "guid": text string for identifying controllers
+     *               - "port": port of the connected device
+     *               - "pad": slot of the connected controller
+     * @returns a unique input device with the parameters specified
+     */
+    std::unique_ptr<Common::Input::InputDevice> CreateHatButtonDevice(
+        const Common::ParamPackage& params);
+
+    /**
+     * Creates a stick device from the parameters given.
+     * @param params contains parameters for creating the device:
+     *               - "axis_x": the controller horizontal axis id to bind with the input
+     *               - "axis_y": the controller vertical axis id to bind with the input
+     *               - "deadzone": the minimum required value to be detected
+     *               - "range": the maximum value required to reach 100%
+     *               - "threshold": the minimum required value to considered pressed
+     *               - "offset_x": the amount of offset in the x axis
+     *               - "offset_y": the amount of offset in the y axis
+     *               - "invert_x": inverts the sign of the horizontal axis
+     *               - "invert_y": inverts the sign of the vertical axis
+     *               - "guid": text string for identifying controllers
+     *               - "port": port of the connected device
+     *               - "pad": slot of the connected controller
+     * @returns a unique input device with the parameters specified
+     */
+    std::unique_ptr<Common::Input::InputDevice> CreateStickDevice(
+        const Common::ParamPackage& params);
+
+    /**
+     * Creates an analog device from the parameters given.
+     * @param params contains parameters for creating the device:
+     *               - "axis": the controller axis id to bind with the input
+     *               - "deadzone": the minimum required value to be detected
+     *               - "range": the maximum value required to reach 100%
+     *               - "threshold": the minimum required value to considered pressed
+     *               - "offset": the amount of offset in the axis
+     *               - "invert": inverts the sign of the axis
+     *               - "guid": text string for identifying controllers
+     *               - "port": port of the connected device
+     *               - "pad": slot of the connected controller
+     * @returns a unique input device with the parameters specified
+     */
+    std::unique_ptr<Common::Input::InputDevice> CreateAnalogDevice(
+        const Common::ParamPackage& params);
+
+    /**
+     * Creates a touch device from the parameters given.
+     * @param params contains parameters for creating the device:
+     *               - "button": the controller hat id to bind with the input
+     *               - "direction": the direction id to be detected
+     *               - "toggle": press once to enable, press again to disable
+     *               - "inverted": inverts the output of the button
+     *               - "axis_x": the controller horizontal axis id to bind with the input
+     *               - "axis_y": the controller vertical axis id to bind with the input
+     *               - "deadzone": the minimum required value to be detected
+     *               - "range": the maximum value required to reach 100%
+     *               - "threshold": the minimum required value to considered pressed
+     *               - "offset_x": the amount of offset in the x axis
+     *               - "offset_y": the amount of offset in the y axis
+     *               - "invert_x": inverts the sign of the horizontal axis
+     *               - "invert_y": inverts the sign of the vertical axis
+     *               - "guid": text string for identifying controllers
+     *               - "port": port of the connected device
+     *               - "pad": slot of the connected controller
+     * @returns a unique input device with the parameters specified
+     */
+    std::unique_ptr<Common::Input::InputDevice> CreateTouchDevice(
+        const Common::ParamPackage& params);
+
+    /**
+     * Creates a motion device from the parameters given.
+     * @param params contains parameters for creating the device:
+     *               - "axis_x": the controller horizontal axis id to bind with the input
+     *               - "axis_y": the controller vertical axis id to bind with the input
+     *               - "axis_z": the controller forward axis id to bind with the input
+     *               - "deadzone": the minimum required value to be detected
+     *               - "range": the maximum value required to reach 100%
+     *               - "offset_x": the amount of offset in the x axis
+     *               - "offset_y": the amount of offset in the y axis
+     *               - "offset_z": the amount of offset in the z axis
+     *               - "invert_x": inverts the sign of the horizontal axis
+     *               - "invert_y": inverts the sign of the vertical axis
+     *               - "invert_z": inverts the sign of the forward axis
+     *               - "guid": text string for identifying controllers
+     *               - "port": port of the connected device
+     *               - "pad": slot of the connected controller
+     * @returns a unique input device with the parameters specified
+     */
+    std::unique_ptr<Common::Input::InputDevice> CreateMotionDevice(Common::ParamPackage params);
+
+    std::shared_ptr<InputEngine> input_engine;
+};
+} // namespace InputCommon

src/input_common/keyboard.cpp

@@ -1,89 +0,0 @@
-// Copyright 2017 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <algorithm>
-#include <atomic>
-#include <list>
-#include <mutex>
-#include <utility>
-#include "input_common/keyboard.h"
-
-namespace InputCommon {
-
-class KeyButton final : public Input::ButtonDevice {
-public:
-    explicit KeyButton(std::atomic<bool>& status_) : status(status_) {}
-
-    ~KeyButton() override = default;
-
-    bool GetStatus() const override {
-        return status.load();
-    }
-
-    friend class KeyButtonList;
-
-private:
-    std::atomic<bool>& status;
-};
-
-struct KeyButtonPair {
-    explicit KeyButtonPair(int key_code_) : key_code(key_code_) {}
-    int key_code;
-    std::atomic<bool> status{false};
-};
-
-class KeyButtonList {
-public:
-    KeyButtonPair& AddKeyButton(int key_code) {
-        std::lock_guard guard{mutex};
-        auto it = std::find_if(list.begin(), list.end(), [key_code](const KeyButtonPair& pair) {
-            return pair.key_code == key_code;
-        });
-        if (it == list.end()) {
-            return list.emplace_back(key_code);
-        }
-        return *it;
-    }
-
-    void ChangeKeyStatus(int key_code, bool pressed) {
-        std::lock_guard guard{mutex};
-        for (KeyButtonPair& pair : list) {
-            if (pair.key_code == key_code)
-                pair.status.store(pressed);
-        }
-    }
-
-    void ChangeAllKeyStatus(bool pressed) {
-        std::lock_guard guard{mutex};
-        for (KeyButtonPair& pair : list) {
-            pair.status.store(pressed);
-        }
-    }
-
-private:
-    std::mutex mutex;
-    std::list<KeyButtonPair> list;
-};
-
-Keyboard::Keyboard() : key_button_list{std::make_shared<KeyButtonList>()} {}
-
-std::unique_ptr<Input::ButtonDevice> Keyboard::Create(const Common::ParamPackage& params) {
-    int key_code = params.Get("code", 0);
-    auto& pair = key_button_list->AddKeyButton(key_code);
-    return std::make_unique<KeyButton>(pair.status);
-}
-
-void Keyboard::PressKey(int key_code) {
-    key_button_list->ChangeKeyStatus(key_code, true);
-}
-
-void Keyboard::ReleaseKey(int key_code) {
-    key_button_list->ChangeKeyStatus(key_code, false);
-}
-
-void Keyboard::ReleaseAllKeys() {
-    key_button_list->ChangeAllKeyStatus(false);
-}
-
-} // namespace InputCommon

src/input_common/keyboard.h

@@ -1,47 +0,0 @@
-// Copyright 2017 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <memory>
-#include "core/frontend/input.h"
-
-namespace InputCommon {
-
-class KeyButtonList;
-
-/**
- * A button device factory representing a keyboard. It receives keyboard events and forward them
- * to all button devices it created.
- */
-class Keyboard final : public Input::Factory<Input::ButtonDevice> {
-public:
-    Keyboard();
-
-    /**
-     * Creates a button device from a keyboard key
-     * @param params contains parameters for creating the device:
-     *     - "code": the code of the key to bind with the button
-     */
-    std::unique_ptr<Input::ButtonDevice> Create(const Common::ParamPackage& params) override;
-
-    /**
-     * Sets the status of all buttons bound with the key to pressed
-     * @param key_code the code of the key to press
-     */
-    void PressKey(int key_code);
-
-    /**
-     * Sets the status of all buttons bound with the key to released
-     * @param key_code the code of the key to release
-     */
-    void ReleaseKey(int key_code);
-
-    void ReleaseAllKeys();
-
-private:
-    std::shared_ptr<KeyButtonList> key_button_list;
-};
-
-} // namespace InputCommon

src/input_common/main.cpp

@@ -1,27 +1,41 @@
-// Copyright 2017 Citra Emulator Project
+// SPDX-FileCopyrightText: 2017 Citra Emulator Project
-// Licensed under GPLv2 or any later version
+// SPDX-License-Identifier: GPL-2.0-or-later
-// Refer to the license.txt file included.
 
 #include <memory>
-#include <thread>
+#include "common/input.h"
 #include "common/param_package.h"
+<<<<<<< HEAD
 #include "input_common/analog_from_button.h"
 #ifdef ENABLE_GCADAPTER
 #include "input_common/gcadapter/gc_adapter.h"
 #include "input_common/gcadapter/gc_poller.h"
 #endif
 #include "input_common/keyboard.h"
+    == == == =
+#include "input_common/drivers/keyboard.h"
+#include "input_common/drivers/mouse.h"
+#include "input_common/drivers/touch_screen.h"
+#include "input_common/drivers/udp_client.h"
+#include "input_common/drivers/virtual_gamepad.h"
+#include "input_common/helpers/stick_from_buttons.h"
+#include "input_common/helpers/touch_from_buttons.h"
+#include "input_common/input_engine.h"
+#include "input_common/input_mapping.h"
+#include "input_common/input_poller.h"
+>>>>>>> 6e5fec9fe (add input common changes)
                  #include "input_common/main.h"
-#include "input_common/motion_emu.h"
+
-#include "input_common/sdl/sdl.h"
+#ifdef HAVE_LIBUSB
-#include "input_common/sdl/sdl_impl.h"
+#include "input_common/drivers/gc_adapter.h"
-#include "input_common/touch_from_button.h"
+#endif
-#include "input_common/udp/udp.h"
+#ifdef HAVE_SDL2
+#include "input_common/drivers/sdl_driver.h"
+#endif
 
     namespace InputCommon {
 
-#ifdef ENABLE_GCADAPTER
+<<<<<<< HEAD
-std::shared_ptr<GCButtonFactory> gcbuttons;
+#ifdef ENABLE_GCADAPTER std::shared_ptr < GCButtonFactory> gcbuttons;
     std::shared_ptr<GCAnalogFactory> gcanalog;
     std::shared_ptr<GCAdapter::Adapter> gcadapter;
 #endif
@@ -46,12 +60,262 @@ void Init() {
         Input::RegisterFactory<Input::MotionDevice>("motion_emu", motion_emu);
         Input::RegisterFactory<Input::TouchDevice>("touch_from_button",
                                                    std::make_shared<TouchFromButtonFactory>());
+        == == == = struct InputSubsystem::Impl {
+            template <typename Engine>
+            void RegisterEngine(std::string name, std::shared_ptr<Engine>& engine) {
+                MappingCallback mapping_callback{
+                    [this](const MappingData& data) { RegisterInput(data); }};
 
-    sdl = SDL::Init();
+                engine = std::make_shared<Engine>(name);
+                engine->SetMappingCallback(mapping_callback);
+>>>>>>> 6e5fec9fe (add input common changes)
 
-    udp = CemuhookUDP::Init();
+                std::shared_ptr<InputFactory> input_factory =
+                    std::make_shared<InputFactory>(engine);
+                std::shared_ptr<OutputFactory> output_factory =
+                    std::make_shared<OutputFactory>(engine);
+                Common::Input::RegisterInputFactory(engine->GetEngineName(),
+                                                    std::move(input_factory));
+                Common::Input::RegisterOutputFactory(engine->GetEngineName(),
+                                                     std::move(output_factory));
             }
 
+            void Initialize() {
+                mapping_factory = std::make_shared<MappingFactory>();
+
+                RegisterEngine("keyboard", keyboard);
+                RegisterEngine("mouse", mouse);
+                RegisterEngine("touch", touch_screen);
+#ifdef HAVE_LIBUSB
+                RegisterEngine("gcpad", gcadapter);
+#endif
+                RegisterEngine("cemuhookudp", udp_client);
+                RegisterEngine("virtual_gamepad", virtual_gamepad);
+#ifdef HAVE_SDL2
+                RegisterEngine("sdl", sdl);
+#endif
+
+                Common::Input::RegisterInputFactory("touch_from_button",
+                                                    std::make_shared<TouchFromButton>());
+                Common::Input::RegisterInputFactory("analog_from_button",
+                                                    std::make_shared<StickFromButton>());
+            }
+
+            template <typename Engine>
+            void UnregisterEngine(std::shared_ptr<Engine>& engine) {
+                Common::Input::UnregisterInputFactory(engine->GetEngineName());
+                Common::Input::UnregisterOutputFactory(engine->GetEngineName());
+                engine.reset();
+            }
+
+            void Shutdown() {
+                UnregisterEngine(keyboard);
+                UnregisterEngine(mouse);
+                UnregisterEngine(touch_screen);
+#ifdef HAVE_LIBUSB
+                UnregisterEngine(gcadapter);
+#endif
+                UnregisterEngine(udp_client);
+                UnregisterEngine(virtual_gamepad);
+#ifdef HAVE_SDL2
+                UnregisterEngine(sdl);
+#endif
+
+                Common::Input::UnregisterInputFactory("touch_from_button");
+                Common::Input::UnregisterInputFactory("analog_from_button");
+            }
+
+            [[nodiscard]] std::vector<Common::ParamPackage> GetInputDevices() const {
+                std::vector<Common::ParamPackage> devices = {
+                    Common::ParamPackage{{"display", "Any"}, {"engine", "any"}},
+                };
+
+                auto keyboard_devices = keyboard->GetInputDevices();
+                devices.insert(devices.end(), keyboard_devices.begin(), keyboard_devices.end());
+                auto mouse_devices = mouse->GetInputDevices();
+                devices.insert(devices.end(), mouse_devices.begin(), mouse_devices.end());
+#ifdef HAVE_LIBUSB
+                auto gcadapter_devices = gcadapter->GetInputDevices();
+                devices.insert(devices.end(), gcadapter_devices.begin(), gcadapter_devices.end());
+#endif
+                auto udp_devices = udp_client->GetInputDevices();
+                devices.insert(devices.end(), udp_devices.begin(), udp_devices.end());
+#ifdef HAVE_SDL2
+                auto sdl_devices = sdl->GetInputDevices();
+                devices.insert(devices.end(), sdl_devices.begin(), sdl_devices.end());
+#endif
+
+                return devices;
+            }
+
+            [[nodiscard]] std::shared_ptr<InputEngine> GetInputEngine(
+                const Common::ParamPackage& params) const {
+                if (!params.Has("engine") || params.Get("engine", "") == "any") {
+                    return nullptr;
+                }
+                const std::string engine = params.Get("engine", "");
+                if (engine == keyboard->GetEngineName()) {
+                    return keyboard;
+                }
+                if (engine == mouse->GetEngineName()) {
+                    return mouse;
+                }
+#ifdef HAVE_LIBUSB
+                if (engine == gcadapter->GetEngineName()) {
+                    return gcadapter;
+                }
+#endif
+                if (engine == udp_client->GetEngineName()) {
+                    return udp_client;
+                }
+#ifdef HAVE_SDL2
+                if (engine == sdl->GetEngineName()) {
+                    return sdl;
+                }
+#endif
+                return nullptr;
+            }
+
+            [[nodiscard]] AnalogMapping GetAnalogMappingForDevice(
+                const Common::ParamPackage& params) const {
+                const auto input_engine = GetInputEngine(params);
+
+                if (input_engine == nullptr) {
+                    return {};
+                }
+
+                return input_engine->GetAnalogMappingForDevice(params);
+            }
+
+            [[nodiscard]] ButtonMapping GetButtonMappingForDevice(
+                const Common::ParamPackage& params) const {
+                const auto input_engine = GetInputEngine(params);
+
+                if (input_engine == nullptr) {
+                    return {};
+                }
+
+                return input_engine->GetButtonMappingForDevice(params);
+            }
+
+            [[nodiscard]] MotionMapping GetMotionMappingForDevice(
+                const Common::ParamPackage& params) const {
+                const auto input_engine = GetInputEngine(params);
+
+                if (input_engine == nullptr) {
+                    return {};
+                }
+
+                return input_engine->GetMotionMappingForDevice(params);
+            }
+
+            Common::Input::ButtonNames GetButtonName(const Common::ParamPackage& params) const {
+                if (!params.Has("engine") || params.Get("engine", "") == "any") {
+                    return Common::Input::ButtonNames::Undefined;
+                }
+                const auto input_engine = GetInputEngine(params);
+
+                if (input_engine == nullptr) {
+                    return Common::Input::ButtonNames::Invalid;
+                }
+
+                return input_engine->GetUIName(params);
+            }
+
+            bool IsStickInverted(const Common::ParamPackage& params) {
+                const auto input_engine = GetInputEngine(params);
+
+                if (input_engine == nullptr) {
+                    return false;
+                }
+
+                return input_engine->IsStickInverted(params);
+            }
+
+            bool IsController(const Common::ParamPackage& params) {
+                const std::string engine = params.Get("engine", "");
+                if (engine == mouse->GetEngineName()) {
+                    return true;
+                }
+#ifdef HAVE_LIBUSB
+                if (engine == gcadapter->GetEngineName()) {
+                    return true;
+                }
+#endif
+                if (engine == udp_client->GetEngineName()) {
+                    return true;
+                }
+                if (engine == virtual_gamepad->GetEngineName()) {
+                    return true;
+                }
+#ifdef HAVE_SDL2
+                if (engine == sdl->GetEngineName()) {
+                    return true;
+                }
+#endif
+                return false;
+            }
+
+            void BeginConfiguration() {
+                keyboard->BeginConfiguration();
+                mouse->BeginConfiguration();
+#ifdef HAVE_LIBUSB
+                gcadapter->BeginConfiguration();
+#endif
+                udp_client->BeginConfiguration();
+#ifdef HAVE_SDL2
+                sdl->BeginConfiguration();
+#endif
+            }
+
+            void EndConfiguration() {
+                keyboard->EndConfiguration();
+                mouse->EndConfiguration();
+#ifdef HAVE_LIBUSB
+                gcadapter->EndConfiguration();
+#endif
+                udp_client->EndConfiguration();
+#ifdef HAVE_SDL2
+                sdl->EndConfiguration();
+#endif
+            }
+
+            void PumpEvents() const {
+#ifdef HAVE_SDL2
+                sdl->PumpEvents();
+#endif
+            }
+
+            void RegisterInput(const MappingData& data) {
+                mapping_factory->RegisterInput(data);
+            }
+
+            std::shared_ptr<MappingFactory> mapping_factory;
+
+            std::shared_ptr<Keyboard> keyboard;
+            std::shared_ptr<Mouse> mouse;
+            std::shared_ptr<TouchScreen> touch_screen;
+            std::shared_ptr<CemuhookUDP::UDPClient> udp_client;
+            std::shared_ptr<VirtualGamepad> virtual_gamepad;
+
+#ifdef HAVE_LIBUSB
+            std::shared_ptr<GCAdapter> gcadapter;
+#endif
+
+#ifdef HAVE_SDL2
+            std::shared_ptr<SDLDriver> sdl;
+#endif
+        };
+
+        InputSubsystem::InputSubsystem() : impl{std::make_unique<Impl>()} {}
+
+        InputSubsystem::~InputSubsystem() = default;
+
+        void InputSubsystem::Initialize() {
+            impl->Initialize();
+        }
+
+<<<<<<< HEAD
         void Shutdown() {
 #ifdef ENABLE_GCADAPTER
             Input::UnregisterFactory<Input::ButtonDevice>("gcpad");
@@ -68,26 +332,111 @@ void Shutdown() {
             Input::UnregisterFactory<Input::TouchDevice>("touch_from_button");
             sdl.reset();
             udp.reset();
+            == == == = void InputSubsystem::Shutdown() {
+                impl->Shutdown();
+>>>>>>> 6e5fec9fe (add input common changes)
             }
 
-Keyboard* GetKeyboard() {
+            Keyboard* InputSubsystem::GetKeyboard() {
-    return keyboard.get();
+                return impl->keyboard.get();
             }
 
-MotionEmu* GetMotionEmu() {
+            const Keyboard* InputSubsystem::GetKeyboard() const {
-    return motion_emu.get();
+                return impl->keyboard.get();
+            }
+
+            Mouse* InputSubsystem::GetMouse() {
+                return impl->mouse.get();
+            }
+
+            const Mouse* InputSubsystem::GetMouse() const {
+                return impl->mouse.get();
+            }
+
+            TouchScreen* InputSubsystem::GetTouchScreen() {
+                return impl->touch_screen.get();
+            }
+
+            const TouchScreen* InputSubsystem::GetTouchScreen() const {
+                return impl->touch_screen.get();
+            }
+
+            VirtualGamepad* InputSubsystem::GetVirtualGamepad() {
+                return impl->virtual_gamepad.get();
+            }
+
+            const VirtualGamepad* InputSubsystem::GetVirtualGamepad() const {
+                return impl->virtual_gamepad.get();
+            }
+
+            std::vector<Common::ParamPackage> InputSubsystem::GetInputDevices() const {
+                return impl->GetInputDevices();
+            }
+
+            AnalogMapping InputSubsystem::GetAnalogMappingForDevice(
+                const Common::ParamPackage& device) const {
+                return impl->GetAnalogMappingForDevice(device);
+            }
+
+            ButtonMapping InputSubsystem::GetButtonMappingForDevice(
+                const Common::ParamPackage& device) const {
+                return impl->GetButtonMappingForDevice(device);
+            }
+
+            MotionMapping InputSubsystem::GetMotionMappingForDevice(
+                const Common::ParamPackage& device) const {
+                return impl->GetMotionMappingForDevice(device);
+            }
+
+            Common::Input::ButtonNames InputSubsystem::GetButtonName(
+                const Common::ParamPackage& params) const {
+                return impl->GetButtonName(params);
+            }
+
+            bool InputSubsystem::IsController(const Common::ParamPackage& params) const {
+                return impl->IsController(params);
+            }
+
+            bool InputSubsystem::IsStickInverted(const Common::ParamPackage& params) const {
+                if (params.Has("axis_x") && params.Has("axis_y")) {
+                    return impl->IsStickInverted(params);
+                }
+                return false;
+            }
+
+            void InputSubsystem::ReloadInputDevices() {
+                impl->udp_client.get()->ReloadSockets();
+            }
+
+            void InputSubsystem::BeginMapping(Polling::InputType type) {
+                impl->BeginConfiguration();
+                impl->mapping_factory->BeginMapping(type);
+            }
+
+            Common::ParamPackage InputSubsystem::GetNextInput() const {
+                return impl->mapping_factory->GetNextInput();
+            }
+
+            void InputSubsystem::StopMapping() const {
+                impl->EndConfiguration();
+                impl->mapping_factory->StopMapping();
+            }
+
+            void InputSubsystem::PumpEvents() const {
+                impl->PumpEvents();
             }
 
             std::string GenerateKeyboardParam(int key_code) {
-    Common::ParamPackage param{
+                Common::ParamPackage param;
-        {"engine", "keyboard"},
+                param.Set("engine", "keyboard");
-        {"code", std::to_string(key_code)},
+                param.Set("code", key_code);
-    };
+                param.Set("toggle", false);
                 return param.Serialize();
             }
 
-std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left, int key_right,
+            std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left,
-                                        int key_modifier, float modifier_scale) {
+                                                    int key_right, int key_modifier,
+                                                    float modifier_scale) {
                 Common::ParamPackage circle_pad_param{
                     {"engine", "analog_from_button"},
                     {"up", GenerateKeyboardParam(key_up)},
@@ -99,13 +448,16 @@ std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left,
                 };
                 return circle_pad_param.Serialize();
             }
+<<<<<<< HEAD
 
-Common::ParamPackage GetControllerButtonBinds(const Common::ParamPackage& params, int button) {
+            Common::ParamPackage GetControllerButtonBinds(const Common::ParamPackage& params,
+                                                          int button) {
                 const auto native_button{static_cast<Settings::NativeButton::Values>(button)};
                 const auto engine{params.Get("engine", "")};
                 if (engine == "sdl") {
-        return dynamic_cast<SDL::SDLState*>(sdl.get())->GetSDLControllerButtonBindByGUID(
+                    return dynamic_cast<SDL::SDLState*>(sdl.get())
-            params.Get("guid", "0"), params.Get("port", 0), native_button);
+                        ->GetSDLControllerButtonBindByGUID(params.Get("guid", "0"),
+                                                           params.Get("port", 0), native_button);
                 }
 #ifdef ENABLE_GCADAPTER
                 if (engine == "gcpad") {
@@ -115,12 +467,14 @@ Common::ParamPackage GetControllerButtonBinds(const Common::ParamPackage& params
                 return {};
             }
 
-Common::ParamPackage GetControllerAnalogBinds(const Common::ParamPackage& params, int analog) {
+            Common::ParamPackage GetControllerAnalogBinds(const Common::ParamPackage& params,
+                                                          int analog) {
                 const auto native_analog{static_cast<Settings::NativeAnalog::Values>(analog)};
                 const auto engine{params.Get("engine", "")};
                 if (engine == "sdl") {
-        return dynamic_cast<SDL::SDLState*>(sdl.get())->GetSDLControllerAnalogBindByGUID(
+                    return dynamic_cast<SDL::SDLState*>(sdl.get())
-            params.Get("guid", "0"), params.Get("port", 0), native_analog);
+                        ->GetSDLControllerAnalogBindByGUID(params.Get("guid", "0"),
+                                                           params.Get("port", 0), native_analog);
                 }
 #ifdef ENABLE_GCADAPTER
                 if (engine == "gcpad") {
@@ -162,4 +516,6 @@ std::vector<std::unique_ptr<DevicePoller>> GetPollers(DeviceType type) {
             }
 
             } // namespace Polling
+            == == == =
+>>>>>>> 6e5fec9fe (add input common changes)
         } // namespace InputCommon

src/input_common/main.h

@@ -1,72 +1,147 @@
-// Copyright 2017 Citra Emulator Project
+// SPDX-FileCopyrightText: 2017 Citra Emulator Project
-// Licensed under GPLv2 or any later version
+// SPDX-License-Identifier: GPL-2.0-or-later
-// Refer to the license.txt file included.
 
 #pragma once
 
 #include <memory>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
 namespace Common {
 class ParamPackage;
 }
 
+namespace Common::Input {
+enum class ButtonNames;
+}
+
+namespace Settings::NativeAnalog {
+enum Values : int;
+}
+
+namespace Settings::NativeButton {
+enum Values : int;
+}
+
+namespace Settings::NativeMotion {
+enum Values : int;
+}
+
 namespace InputCommon {
+class Keyboard;
+class Mouse;
+class TouchScreen;
+class VirtualGamepad;
+struct MappingData;
+} // namespace InputCommon
+
+namespace InputCommon {
+namespace Polling {
+/// Type of input desired for mapping purposes
+enum class InputType { None, Button, Stick, Motion, Touch };
+} // namespace Polling
+
+/**
+ * Given a ParamPackage for a Device returned from `GetInputDevices`, attempt to get the default
+ * mapping for the device.
+ */
+using AnalogMapping = std::unordered_map<Settings::NativeAnalog::Values, Common::ParamPackage>;
+using ButtonMapping = std::unordered_map<Settings::NativeButton::Values, Common::ParamPackage>;
+using MotionMapping = std::unordered_map<Settings::NativeMotion::Values, Common::ParamPackage>;
+
+class InputSubsystem {
+public:
+    explicit InputSubsystem();
+    ~InputSubsystem();
+
+    InputSubsystem(const InputSubsystem&) = delete;
+    InputSubsystem& operator=(const InputSubsystem&) = delete;
+
+    InputSubsystem(InputSubsystem&&) = delete;
+    InputSubsystem& operator=(InputSubsystem&&) = delete;
 
     /// Initializes and registers all built-in input device factories.
-void Init();
+    void Initialize();
 
-/// Deregisters all built-in input device factories and shuts them down.
+    /// Unregisters all built-in input device factories and shuts them down.
     void Shutdown();
 
-class Keyboard;
+    /// Retrieves the underlying keyboard device.
+    [[nodiscard]] Keyboard* GetKeyboard();
 
-/// Gets the keyboard button device factory.
+    /// Retrieves the underlying keyboard device.
-Keyboard* GetKeyboard();
+    [[nodiscard]] const Keyboard* GetKeyboard() const;
 
-class MotionEmu;
+    /// Retrieves the underlying mouse device.
+    [[nodiscard]] Mouse* GetMouse();
 
-/// Gets the motion emulation factory.
+    /// Retrieves the underlying mouse device.
-MotionEmu* GetMotionEmu();
+    [[nodiscard]] const Mouse* GetMouse() const;
 
-/// Generates a serialized param package for creating a keyboard button device
+    /// Retrieves the underlying touch screen device.
-std::string GenerateKeyboardParam(int key_code);
+    [[nodiscard]] TouchScreen* GetTouchScreen();
 
-/// Generates a serialized param package for creating an analog device taking input from keyboard
+    /// Retrieves the underlying touch screen device.
-std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left, int key_right,
+    [[nodiscard]] const TouchScreen* GetTouchScreen() const;
-                                        int key_modifier, float modifier_scale);
 
-Common::ParamPackage GetControllerButtonBinds(const Common::ParamPackage& params, int button);
+    /// Retrieves the underlying virtual gamepad input device.
-Common::ParamPackage GetControllerAnalogBinds(const Common::ParamPackage& params, int analog);
+    [[nodiscard]] VirtualGamepad* GetVirtualGamepad();
 
-/// Reloads the input devices
+    /// Retrieves the underlying virtual gamepad input device.
+    [[nodiscard]] const VirtualGamepad* GetVirtualGamepad() const;
+
+    /**
+     * Returns all available input devices that this Factory can create a new device with.
+     * Each returned ParamPackage should have a `display` field used for display, a `engine` field
+     * for backends to determine if this backend is meant to service the request and any other
+     * information needed to identify this in the backend later.
+     */
+    [[nodiscard]] std::vector<Common::ParamPackage> GetInputDevices() const;
+
+    /// Retrieves the analog mappings for the given device.
+    [[nodiscard]] AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& device) const;
+
+    /// Retrieves the button mappings for the given device.
+    [[nodiscard]] ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& device) const;
+
+    /// Retrieves the motion mappings for the given device.
+    [[nodiscard]] MotionMapping GetMotionMappingForDevice(const Common::ParamPackage& device) const;
+
+    /// Returns an enum contaning the name to be displayed from the input engine.
+    [[nodiscard]] Common::Input::ButtonNames GetButtonName(
+        const Common::ParamPackage& params) const;
+
+    /// Returns true if device is a controller.
+    [[nodiscard]] bool IsController(const Common::ParamPackage& params) const;
+
+    /// Returns true if axis of a stick aren't mapped in the correct direction
+    [[nodiscard]] bool IsStickInverted(const Common::ParamPackage& device) const;
+
+    /// Reloads the input devices.
     void ReloadInputDevices();
 
-namespace Polling {
+    /// Start polling from all backends for a desired input type.
+    void BeginMapping(Polling::InputType type);
 
-enum class DeviceType { Button, Analog };
+    /// Returns an input event with mapping information.
+    [[nodiscard]] Common::ParamPackage GetNextInput() const;
 
-/**
+    /// Stop polling from all backends.
- * A class that can be used to get inputs from an input device like controllers without having to
+    void StopMapping() const;
- * poll the device's status yourself
+
- */
+    /// Signals SDL driver for new input events
-class DevicePoller {
+    void PumpEvents() const;
-public:
+
-    virtual ~DevicePoller() = default;
+private:
-    /// Setup and start polling for inputs, should be called before GetNextInput
+    struct Impl;
-    virtual void Start() = 0;
+    std::unique_ptr<Impl> impl;
-    /// Stop polling
-    virtual void Stop() = 0;
-    /**
-     * Every call to this function returns the next input recorded since calling Start
-     * @return A ParamPackage of the recorded input, which can be used to create an InputDevice.
-     *         If there has been no input, the package is empty
-     */
-    virtual Common::ParamPackage GetNextInput() = 0;
 };
 
-// Get all DevicePoller from all backends for a specific device type
+/// Generates a serialized param package for creating a keyboard button device.
-std::vector<std::unique_ptr<DevicePoller>> GetPollers(DeviceType type);
+std::string GenerateKeyboardParam(int key_code);
-} // namespace Polling
+
+/// Generates a serialized param package for creating an analog device taking input from keyboard.
+std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left, int key_right,
+                                        int key_modifier, float modifier_scale);
 } // namespace InputCommon

src/input_common/motion_emu.cpp

@@ -1,173 +0,0 @@
-// Copyright 2017 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <algorithm>
-#include <chrono>
-#include <mutex>
-#include <thread>
-#include <tuple>
-#include "common/math_util.h"
-#include "common/quaternion.h"
-#include "common/thread.h"
-#include "common/vector_math.h"
-#include "input_common/motion_emu.h"
-
-namespace InputCommon {
-
-// Implementation class of the motion emulation device
-class MotionEmuDevice {
-public:
-    MotionEmuDevice(int update_millisecond, float sensitivity, float tilt_clamp)
-        : update_millisecond(update_millisecond),
-          update_duration(std::chrono::duration_cast<std::chrono::steady_clock::duration>(
-              std::chrono::milliseconds(update_millisecond))),
-          sensitivity(sensitivity), tilt_clamp(tilt_clamp),
-          motion_emu_thread(&MotionEmuDevice::MotionEmuThread, this) {}
-
-    ~MotionEmuDevice() {
-        if (motion_emu_thread.joinable()) {
-            shutdown_event.Set();
-            motion_emu_thread.join();
-        }
-    }
-
-    void BeginTilt(int x, int y) {
-        mouse_origin = Common::MakeVec(x, y);
-        is_tilting = true;
-    }
-
-    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 * this->tilt_clamp / 180.0f);
-            }
-        }
-    }
-
-    void EndTilt() {
-        std::lock_guard guard{tilt_mutex};
-        tilt_angle = 0;
-        is_tilting = false;
-    }
-
-    std::tuple<Common::Vec3<float>, Common::Vec3<float>> GetStatus() {
-        std::lock_guard guard{status_mutex};
-        return status;
-    }
-
-private:
-    const int update_millisecond;
-    const std::chrono::steady_clock::duration update_duration;
-    const float sensitivity;
-
-    Common::Vec2<int> mouse_origin;
-
-    std::mutex tilt_mutex;
-    Common::Vec2<float> tilt_direction;
-    float tilt_angle = 0;
-    float tilt_clamp = 90;
-
-    bool is_tilting = false;
-
-    Common::Event shutdown_event;
-
-    std::tuple<Common::Vec3<float>, Common::Vec3<float>> status;
-    std::mutex status_mutex;
-
-    // Note: always keep the thread declaration at the end so that other objects are initialized
-    // before this!
-    std::thread motion_emu_thread;
-
-    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;
-
-            {
-                std::lock_guard guard{tilt_mutex};
-
-                // Find the quaternion describing current 3DS tilting
-                q = Common::MakeQuaternion(
-                    Common::MakeVec(-tilt_direction.y, 0.0f, tilt_direction.x), tilt_angle);
-            }
-
-            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;
-
-            // Transform the two vectors from world space to 3DS space
-            gravity = QuaternionRotate(inv_q, gravity);
-            angular_rate = QuaternionRotate(inv_q, angular_rate);
-
-            // Update the sensor state
-            {
-                std::lock_guard guard{status_mutex};
-                status = std::make_tuple(gravity, angular_rate);
-            }
-        }
-    }
-};
-
-// Interface wrapper held by input receiver as a unique_ptr. It holds the implementation class as
-// a shared_ptr, which is also observed by the factory class as a weak_ptr. In this way the factory
-// 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, float tilt_clamp) {
-        device = std::make_shared<MotionEmuDevice>(update_millisecond, sensitivity, tilt_clamp);
-    }
-
-    std::tuple<Common::Vec3<float>, Common::Vec3<float>> GetStatus() const override {
-        return device->GetStatus();
-    }
-
-    std::shared_ptr<MotionEmuDevice> device;
-};
-
-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);
-    float tilt_clamp = params.Get("tilt_clamp", 90.0f);
-    auto device_wrapper =
-        std::make_unique<MotionEmuDeviceWrapper>(update_period, sensitivity, tilt_clamp);
-    // Previously created device is disconnected here. Having two motion devices for 3DS is not
-    // expected.
-    current_device = device_wrapper->device;
-    return std::move(device_wrapper);
-}
-
-void MotionEmu::BeginTilt(int x, int y) {
-    if (auto ptr = current_device.lock()) {
-        ptr->BeginTilt(x, y);
-    }
-}
-
-void MotionEmu::Tilt(int x, int y) {
-    if (auto ptr = current_device.lock()) {
-        ptr->Tilt(x, y);
-    }
-}
-
-void MotionEmu::EndTilt() {
-    if (auto ptr = current_device.lock()) {
-        ptr->EndTilt();
-    }
-}
-
-} // namespace InputCommon

src/input_common/motion_emu.h

@@ -1,46 +0,0 @@
-// Copyright 2017 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include "core/frontend/input.h"
-
-namespace InputCommon {
-
-class MotionEmuDevice;
-
-class MotionEmu : public Input::Factory<Input::MotionDevice> {
-public:
-    /**
-     * Creates a motion device emulated from mouse input
-     * @param params contains parameters for creating the device:
-     *     - "update_period": update period in milliseconds
-     *     - "sensitivity": the coefficient converting mouse movement to tilting angle
-     */
-    std::unique_ptr<Input::MotionDevice> Create(const Common::ParamPackage& params) override;
-
-    /**
-     * Signals that a motion sensor tilt has begun.
-     * @param x the x-coordinate of the cursor
-     * @param y the y-coordinate of the cursor
-     */
-    void BeginTilt(int x, int y);
-
-    /**
-     * Signals that a motion sensor tilt is occurring.
-     * @param x the x-coordinate of the cursor
-     * @param y the y-coordinate of the cursor
-     */
-    void Tilt(int x, int y);
-
-    /**
-     * Signals that a motion sensor tilt has ended.
-     */
-    void EndTilt();
-
-private:
-    std::weak_ptr<MotionEmuDevice> current_device;
-};
-
-} // namespace InputCommon

src/input_common/sdl/sdl.cpp

@@ -1,19 +0,0 @@
-// Copyright 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include "input_common/sdl/sdl.h"
-#ifdef HAVE_SDL2
-#include "input_common/sdl/sdl_impl.h"
-#endif
-
-namespace InputCommon::SDL {
-
-std::unique_ptr<State> Init() {
-#ifdef HAVE_SDL2
-    return std::make_unique<SDLState>();
-#else
-    return std::make_unique<NullState>();
-#endif
-}
-} // namespace InputCommon::SDL

src/input_common/sdl/sdl.h

@@ -1,44 +0,0 @@
-// Copyright 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <memory>
-#include <vector>
-#include "core/frontend/input.h"
-#include "input_common/main.h"
-
-union SDL_Event;
-
-namespace Common {
-class ParamPackage;
-} // namespace Common
-
-namespace InputCommon::Polling {
-class DevicePoller;
-enum class DeviceType;
-} // namespace InputCommon::Polling
-
-namespace InputCommon::SDL {
-
-class State {
-public:
-    using Pollers = std::vector<std::unique_ptr<Polling::DevicePoller>>;
-
-    /// Unregisters SDL device factories and shut them down.
-    virtual ~State() = default;
-
-    virtual Pollers GetPollers(Polling::DeviceType type) = 0;
-};
-
-class NullState : public State {
-public:
-    Pollers GetPollers(Polling::DeviceType type) override {
-        return {};
-    }
-};
-
-std::unique_ptr<State> Init();
-
-} // namespace InputCommon::SDL

src/input_common/sdl/sdl_impl.h

@@ -1,85 +0,0 @@
-// Copyright 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <atomic>
-#include <memory>
-#include <thread>
-#include <unordered_map>
-#include "common/settings.h"
-#include "common/threadsafe_queue.h"
-#include "input_common/sdl/sdl.h"
-
-union SDL_Event;
-using SDL_Joystick = struct _SDL_Joystick;
-using SDL_JoystickID = s32;
-using SDL_GameController = struct _SDL_GameController;
-
-namespace InputCommon::SDL {
-
-class SDLJoystick;
-class SDLGameController;
-class SDLButtonFactory;
-class SDLAnalogFactory;
-class SDLMotionFactory;
-
-class SDLState : public State {
-public:
-    /// Initializes and registers SDL device factories
-    SDLState();
-
-    /// Unregisters SDL device factories and shut them down.
-    ~SDLState() override;
-
-    /// Handle SDL_Events for joysticks from SDL_PollEvent
-    void HandleGameControllerEvent(const SDL_Event& event);
-
-    std::shared_ptr<SDLJoystick> GetSDLJoystickBySDLID(SDL_JoystickID sdl_id);
-    std::shared_ptr<SDLJoystick> GetSDLJoystickByGUID(const std::string& guid, int port);
-
-    std::shared_ptr<SDLGameController> GetSDLGameControllerByGUID(const std::string& guid,
-                                                                  int port);
-
-    Common::ParamPackage GetSDLControllerButtonBindByGUID(const std::string& guid, int port,
-                                                          Settings::NativeButton::Values button);
-    Common::ParamPackage GetSDLControllerAnalogBindByGUID(const std::string& guid, int port,
-                                                          Settings::NativeAnalog::Values analog);
-
-    /// Get all DevicePoller that use the SDL backend for a specific device type
-    Pollers GetPollers(Polling::DeviceType type) override;
-
-    /// Used by the Pollers during config
-    std::atomic<bool> polling = false;
-    Common::SPSCQueue<SDL_Event> event_queue;
-
-private:
-    void InitJoystick(int joystick_index);
-    void CloseJoystick(SDL_Joystick* sdl_joystick);
-
-    void InitGameController(int joystick_index);
-    void CloseGameController(SDL_GameController* sdl_controller);
-
-    /// Needs to be called before SDL_QuitSubSystem.
-    void CloseJoysticks();
-    void CloseGameControllers();
-
-    /// Map of GUID of a list of corresponding virtual Joysticks
-    std::unordered_map<std::string, std::vector<std::shared_ptr<SDLJoystick>>> joystick_map;
-    std::mutex joystick_map_mutex;
-
-    /// Map of GUID of a list of corresponding virtual Controllers
-    std::unordered_map<std::string, std::vector<std::shared_ptr<SDLGameController>>> controller_map;
-    std::mutex controller_map_mutex;
-
-    std::shared_ptr<SDLButtonFactory> button_factory;
-    std::shared_ptr<SDLAnalogFactory> analog_factory;
-    std::shared_ptr<SDLMotionFactory> motion_factory;
-
-    bool start_thread = false;
-    std::atomic<bool> initialized = false;
-
-    std::thread poll_thread;
-};
-} // namespace InputCommon::SDL

src/input_common/touch_from_button.cpp

@@ -1,49 +0,0 @@
-// Copyright 2020 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include "common/settings.h"
-#include "core/3ds.h"
-#include "input_common/touch_from_button.h"
-
-namespace InputCommon {
-
-class TouchFromButtonDevice final : public Input::TouchDevice {
-public:
-    TouchFromButtonDevice() {
-        for (const auto& config_entry :
-             Settings::values
-                 .touch_from_button_maps[Settings::values.current_input_profile
-                                             .touch_from_button_map_index]
-                 .buttons) {
-
-            const Common::ParamPackage package{config_entry};
-            map.emplace_back(Input::CreateDevice<Input::ButtonDevice>(config_entry),
-                             std::clamp(package.Get("x", 0), 0, Core::kScreenBottomWidth),
-                             std::clamp(package.Get("y", 0), 0, Core::kScreenBottomHeight));
-        }
-    }
-
-    std::tuple<float, float, bool> GetStatus() const override {
-        for (const auto& m : map) {
-            const bool state = std::get<0>(m)->GetStatus();
-            if (state) {
-                const float x = static_cast<float>(std::get<1>(m)) / Core::kScreenBottomWidth;
-                const float y = static_cast<float>(std::get<2>(m)) / Core::kScreenBottomHeight;
-                return {x, y, true};
-            }
-        }
-        return {};
-    }
-
-private:
-    // A vector of the mapped button, its x and its y-coordinate
-    std::vector<std::tuple<std::unique_ptr<Input::ButtonDevice>, int, int>> map;
-};
-
-std::unique_ptr<Input::TouchDevice> TouchFromButtonFactory::Create(
-    const Common::ParamPackage& params) {
-    return std::make_unique<TouchFromButtonDevice>();
-}
-
-} // namespace InputCommon

src/input_common/touch_from_button.h

@@ -1,23 +0,0 @@
-// Copyright 2020 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <memory>
-#include "core/frontend/input.h"
-
-namespace InputCommon {
-
-/**
- * A touch device factory that takes a list of button devices and combines them into a touch device.
- */
-class TouchFromButtonFactory final : public Input::Factory<Input::TouchDevice> {
-public:
-    /**
-     * Creates a touch device from a list of button devices
-     */
-    std::unique_ptr<Input::TouchDevice> Create(const Common::ParamPackage& params) override;
-};
-
-} // namespace InputCommon

src/input_common/udp/client.cpp

@@ -1,293 +0,0 @@
-// Copyright 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <algorithm>
-#include <array>
-#include <chrono>
-#include <cstring>
-#include <functional>
-#include <thread>
-#include <boost/asio.hpp>
-#include "common/logging/log.h"
-#include "input_common/udp/client.h"
-#include "input_common/udp/protocol.h"
-
-using boost::asio::ip::udp;
-
-namespace InputCommon::CemuhookUDP {
-
-struct SocketCallback {
-    std::function<void(Response::Version)> version;
-    std::function<void(Response::PortInfo)> port_info;
-    std::function<void(Response::PadData)> pad_data;
-};
-
-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) {
-        boost::system::error_code ec{};
-        auto ipv4 = boost::asio::ip::make_address_v4(host, ec);
-        if (ec.value() != boost::system::errc::success) {
-            LOG_ERROR(Input, "Invalid IPv4 address \"{}\" provided to socket", host);
-            ipv4 = boost::asio::ip::address_v4{};
-        }
-
-        send_endpoint = {udp::endpoint(ipv4, port)};
-    }
-
-    void Stop() {
-        io_service.stop();
-    }
-
-    void Loop() {
-        io_service.run();
-    }
-
-    void StartSend(const clock::time_point& from) {
-        timer.expires_at(from + std::chrono::seconds(3));
-        timer.async_wait([this](const boost::system::error_code& error) { HandleSend(error); });
-    }
-
-    void StartReceive() {
-        socket.async_receive_from(
-            boost::asio::buffer(receive_buffer), receive_endpoint,
-            [this](const boost::system::error_code& error, std::size_t bytes_transferred) {
-                HandleReceive(error, bytes_transferred);
-            });
-    }
-
-private:
-    void HandleReceive(const boost::system::error_code& error, std::size_t bytes_transferred) {
-        if (auto type = Response::Validate(receive_buffer.data(), bytes_transferred)) {
-            switch (*type) {
-            case Type::Version: {
-                Response::Version version;
-                std::memcpy(&version, &receive_buffer[sizeof(Header)], sizeof(Response::Version));
-                callback.version(std::move(version));
-                break;
-            }
-            case Type::PortInfo: {
-                Response::PortInfo port_info;
-                std::memcpy(&port_info, &receive_buffer[sizeof(Header)],
-                            sizeof(Response::PortInfo));
-                callback.port_info(std::move(port_info));
-                break;
-            }
-            case Type::PadData: {
-                Response::PadData pad_data;
-                std::memcpy(&pad_data, &receive_buffer[sizeof(Header)], sizeof(Response::PadData));
-                callback.pad_data(std::move(pad_data));
-                break;
-            }
-            }
-        }
-        StartReceive();
-    }
-
-    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 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 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);
-        StartSend(timer.expiry());
-    }
-
-    SocketCallback callback;
-    boost::asio::io_service io_service;
-    boost::asio::basic_waitable_timer<clock> timer;
-    udp::socket socket;
-
-    u32 client_id{};
-    u8 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>);
-    std::array<u8, PORT_INFO_SIZE> send_buffer1;
-    std::array<u8, PAD_DATA_SIZE> send_buffer2;
-    udp::endpoint send_endpoint;
-
-    std::array<u8, MAX_PACKET_SIZE> receive_buffer;
-    udp::endpoint receive_endpoint;
-};
-
-static void SocketLoop(Socket* socket) {
-    socket->StartReceive();
-    socket->StartSend(Socket::clock::now());
-    socket->Loop();
-}
-
-Client::Client(std::shared_ptr<DeviceStatus> status, const std::string& host, u16 port,
-               u8 pad_index, u32 client_id)
-    : status(std::move(status)) {
-    StartCommunication(host, port, pad_index, client_id);
-}
-
-Client::~Client() {
-    socket->Stop();
-    thread.join();
-}
-
-void Client::ReloadSocket(const std::string& host, u16 port, u8 pad_index, u32 client_id) {
-    socket->Stop();
-    thread.join();
-    StartCommunication(host, port, pad_index, client_id);
-}
-
-void Client::OnVersion(Response::Version data) {
-    LOG_TRACE(Input, "Version packet received: {}", data.version);
-}
-
-void Client::OnPortInfo(Response::PortInfo data) {
-    LOG_TRACE(Input, "PortInfo packet received: {}", data.model);
-}
-
-void Client::OnPadData(Response::PadData data) {
-    LOG_TRACE(Input, "PadData packet received");
-    if (data.packet_counter <= packet_sequence) {
-        LOG_WARNING(
-            Input,
-            "PadData packet dropped because its stale info. Current count: {} Packet count: {}",
-            packet_sequence, data.packet_counter);
-        return;
-    }
-    packet_sequence = data.packet_counter;
-    // Due to differences between the 3ds and cemuhookudp motion directions, we need to invert
-    // accel.x and accel.z and also invert pitch and yaw. See
-    // https://github.com/citra-emu/citra/pull/4049 for more details on gyro/accel
-    Common::Vec3f accel = Common::MakeVec<float>(-data.accel.x, data.accel.y, -data.accel.z);
-    Common::Vec3f gyro = Common::MakeVec<float>(-data.gyro.pitch, -data.gyro.yaw, data.gyro.roll);
-    {
-        std::lock_guard guard(status->update_mutex);
-
-        status->motion_status = {accel, gyro};
-
-        // TODO: add a setting for "click" touch. Click touch refers to a device that differentiates
-        // between a simple "tap" and a hard press that causes the touch screen to click.
-        const bool is_active = data.touch_1.is_active != 0;
-
-        float x = 0;
-        float y = 0;
-
-        if (is_active && status->touch_calibration) {
-            const u16 min_x = status->touch_calibration->min_x;
-            const u16 max_x = status->touch_calibration->max_x;
-            const u16 min_y = status->touch_calibration->min_y;
-            const u16 max_y = status->touch_calibration->max_y;
-
-            x = (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) /
-                static_cast<float>(max_y - min_y);
-        }
-
-        status->touch_status = {x, y, is_active};
-    }
-}
-
-void Client::StartCommunication(const std::string& host, u16 port, u8 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); }};
-    LOG_INFO(Input, "Starting communication with UDP input server on {}:{}", host, port);
-    socket = std::make_unique<Socket>(host, port, pad_index, client_id, callback);
-    thread = std::thread{SocketLoop, this->socket.get()};
-}
-
-void TestCommunication(const std::string& host, u16 port, u8 pad_index, u32 client_id,
-                       const std::function<void()>& success_callback,
-                       const std::function<void()>& failure_callback) {
-    std::thread([=] {
-        Common::Event success_event;
-        SocketCallback callback{[](Response::Version version) {}, [](Response::PortInfo info) {},
-                                [&](Response::PadData data) { success_event.Set(); }};
-        Socket socket{host, port, pad_index, client_id, std::move(callback)};
-        std::thread worker_thread{SocketLoop, &socket};
-        bool result = success_event.WaitFor(std::chrono::seconds(8));
-        socket.Stop();
-        worker_thread.join();
-        if (result) {
-            success_callback();
-        } else {
-            failure_callback();
-        }
-    }).detach();
-}
-
-CalibrationConfigurationJob::CalibrationConfigurationJob(
-    const std::string& host, u16 port, u8 pad_index, u32 client_id,
-    std::function<void(Status)> status_callback,
-    std::function<void(u16, u16, u16, u16)> data_callback) {
-
-    std::thread([=, this] {
-        u16 min_x{UINT16_MAX};
-        u16 min_y{UINT16_MAX};
-        u16 max_x{};
-        u16 max_y{};
-
-        Status current_status{Status::Initialized};
-        SocketCallback callback{[](Response::Version version) {}, [](Response::PortInfo info) {},
-                                [&](Response::PadData data) {
-                                    constexpr u16 CALIBRATION_THRESHOLD = 100;
-
-                                    if (current_status == Status::Initialized) {
-                                        // Receiving data means the communication is ready now
-                                        current_status = Status::Ready;
-                                        status_callback(current_status);
-                                    }
-                                    if (!data.touch_1.is_active) {
-                                        return;
-                                    }
-                                    LOG_DEBUG(Input, "Current touch: {} {}", data.touch_1.x,
-                                              data.touch_1.y);
-                                    min_x = std::min(min_x, static_cast<u16>(data.touch_1.x));
-                                    min_y = std::min(min_y, static_cast<u16>(data.touch_1.y));
-                                    if (current_status == Status::Ready) {
-                                        // First touch - min data (min_x/min_y)
-                                        current_status = Status::Stage1Completed;
-                                        status_callback(current_status);
-                                    }
-                                    if (data.touch_1.x - min_x > CALIBRATION_THRESHOLD &&
-                                        data.touch_1.y - min_y > CALIBRATION_THRESHOLD) {
-                                        // Set the current position as max value and finishes
-                                        // configuration
-                                        max_x = data.touch_1.x;
-                                        max_y = data.touch_1.y;
-                                        current_status = Status::Completed;
-                                        data_callback(min_x, min_y, max_x, max_y);
-                                        status_callback(current_status);
-
-                                        complete_event.Set();
-                                    }
-                                }};
-        Socket socket{host, port, pad_index, client_id, std::move(callback)};
-        std::thread worker_thread{SocketLoop, &socket};
-        complete_event.Wait();
-        socket.Stop();
-        worker_thread.join();
-    }).detach();
-}
-
-CalibrationConfigurationJob::~CalibrationConfigurationJob() {
-    Stop();
-}
-
-void CalibrationConfigurationJob::Stop() {
-    complete_event.Set();
-}
-
-} // namespace InputCommon::CemuhookUDP

src/input_common/udp/client.h

@@ -1,95 +0,0 @@
-// Copyright 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <functional>
-#include <memory>
-#include <mutex>
-#include <optional>
-#include <string>
-#include <thread>
-#include <tuple>
-#include "common/common_types.h"
-#include "common/thread.h"
-#include "common/vector_math.h"
-
-namespace InputCommon::CemuhookUDP {
-
-constexpr u16 DEFAULT_PORT = 26760;
-constexpr char DEFAULT_ADDR[] = "127.0.0.1";
-
-class Socket;
-
-namespace Response {
-struct PadData;
-struct PortInfo;
-struct Version;
-} // namespace Response
-
-struct DeviceStatus {
-    std::mutex update_mutex;
-    std::tuple<Common::Vec3<float>, Common::Vec3<float>> motion_status;
-    std::tuple<float, float, bool> touch_status;
-
-    // calibration data for scaling the device's touch area to 3ds
-    struct CalibrationData {
-        u16 min_x{};
-        u16 min_y{};
-        u16 max_x{};
-        u16 max_y{};
-    };
-    std::optional<CalibrationData> touch_calibration;
-};
-
-class Client {
-public:
-    explicit Client(std::shared_ptr<DeviceStatus> status, const std::string& host = DEFAULT_ADDR,
-                    u16 port = DEFAULT_PORT, u8 pad_index = 0, u32 client_id = 24872);
-    ~Client();
-    void ReloadSocket(const std::string& host = "127.0.0.1", u16 port = 26760, u8 pad_index = 0,
-                      u32 client_id = 24872);
-
-private:
-    void OnVersion(Response::Version);
-    void OnPortInfo(Response::PortInfo);
-    void OnPadData(Response::PadData);
-    void StartCommunication(const std::string& host, u16 port, u8 pad_index, u32 client_id);
-
-    std::unique_ptr<Socket> socket;
-    std::shared_ptr<DeviceStatus> status;
-    std::thread thread;
-    u64 packet_sequence = 0;
-};
-
-/// An async job allowing configuration of the touchpad calibration.
-class CalibrationConfigurationJob {
-public:
-    enum class Status {
-        Initialized,
-        Ready,
-        Stage1Completed,
-        Completed,
-    };
-    /**
-     * Constructs and starts the job with the specified parameter.
-     *
-     * @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,
-                                         u32 client_id, std::function<void(Status)> status_callback,
-                                         std::function<void(u16, u16, u16, u16)> data_callback);
-    ~CalibrationConfigurationJob();
-    void Stop();
-
-private:
-    Common::Event complete_event;
-};
-
-void TestCommunication(const std::string& host, u16 port, u8 pad_index, u32 client_id,
-                       const std::function<void()>& success_callback,
-                       const std::function<void()>& failure_callback);
-
-} // namespace InputCommon::CemuhookUDP

src/input_common/udp/udp.cpp

@@ -1,100 +0,0 @@
-// Copyright 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#include <mutex>
-#include <optional>
-#include <tuple>
-#include "common/param_package.h"
-#include "common/settings.h"
-#include "core/frontend/input.h"
-#include "input_common/udp/client.h"
-#include "input_common/udp/udp.h"
-
-namespace InputCommon::CemuhookUDP {
-
-class UDPTouchDevice final : public Input::TouchDevice {
-public:
-    explicit UDPTouchDevice(std::shared_ptr<DeviceStatus> status_) : status(std::move(status_)) {}
-    std::tuple<float, float, bool> GetStatus() const override {
-        std::lock_guard guard(status->update_mutex);
-        return status->touch_status;
-    }
-
-private:
-    std::shared_ptr<DeviceStatus> status;
-};
-
-class UDPMotionDevice final : public Input::MotionDevice {
-public:
-    explicit UDPMotionDevice(std::shared_ptr<DeviceStatus> status_) : status(std::move(status_)) {}
-    std::tuple<Common::Vec3<float>, Common::Vec3<float>> GetStatus() const override {
-        std::lock_guard guard(status->update_mutex);
-        return status->motion_status;
-    }
-
-private:
-    std::shared_ptr<DeviceStatus> status;
-};
-
-class UDPTouchFactory final : public Input::Factory<Input::TouchDevice> {
-public:
-    explicit UDPTouchFactory(std::shared_ptr<DeviceStatus> status_) : status(std::move(status_)) {}
-
-    std::unique_ptr<Input::TouchDevice> Create(const Common::ParamPackage& params) override {
-        {
-            std::lock_guard guard(status->update_mutex);
-            status->touch_calibration = DeviceStatus::CalibrationData{};
-            // These default values work well for DS4 but probably not other touch inputs
-            status->touch_calibration->min_x = params.Get("min_x", 100);
-            status->touch_calibration->min_y = params.Get("min_y", 50);
-            status->touch_calibration->max_x = params.Get("max_x", 1800);
-            status->touch_calibration->max_y = params.Get("max_y", 850);
-        }
-        return std::make_unique<UDPTouchDevice>(status);
-    }
-
-private:
-    std::shared_ptr<DeviceStatus> status;
-};
-
-class UDPMotionFactory final : public Input::Factory<Input::MotionDevice> {
-public:
-    explicit UDPMotionFactory(std::shared_ptr<DeviceStatus> status_) : status(std::move(status_)) {}
-
-    std::unique_ptr<Input::MotionDevice> Create(const Common::ParamPackage& params) override {
-        return std::make_unique<UDPMotionDevice>(status);
-    }
-
-private:
-    std::shared_ptr<DeviceStatus> status;
-};
-
-State::State() {
-    auto status = std::make_shared<DeviceStatus>();
-    client =
-        std::make_unique<Client>(status, Settings::values.current_input_profile.udp_input_address,
-                                 Settings::values.current_input_profile.udp_input_port,
-                                 Settings::values.current_input_profile.udp_pad_index);
-
-    Input::RegisterFactory<Input::TouchDevice>("cemuhookudp",
-                                               std::make_shared<UDPTouchFactory>(status));
-    Input::RegisterFactory<Input::MotionDevice>("cemuhookudp",
-                                                std::make_shared<UDPMotionFactory>(status));
-}
-
-State::~State() {
-    Input::UnregisterFactory<Input::TouchDevice>("cemuhookudp");
-    Input::UnregisterFactory<Input::MotionDevice>("cemuhookudp");
-}
-
-void State::ReloadUDPClient() {
-    client->ReloadSocket(Settings::values.current_input_profile.udp_input_address,
-                         Settings::values.current_input_profile.udp_input_port,
-                         Settings::values.current_input_profile.udp_pad_index);
-}
-
-std::unique_ptr<State> Init() {
-    return std::make_unique<State>();
-}
-} // namespace InputCommon::CemuhookUDP

src/input_common/udp/udp.h

@@ -1,24 +0,0 @@
-// Copyright 2018 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <memory>
-#include "input_common/udp/client.h"
-
-namespace InputCommon::CemuhookUDP {
-
-class State {
-public:
-    State();
-    ~State();
-    void ReloadUDPClient();
-
-private:
-    std::unique_ptr<Client> client;
-};
-
-std::unique_ptr<State> Init();
-
-} // namespace InputCommon::CemuhookUDP