4 files changed, 594 insertions, 0 deletions
diff --git a/src/input_common/mouse/mouse_input.cpp b/src/input_common/mouse/mouse_input.cpp
new file mode 100644
index 000000000..3f4264caa
--- /dev/null
+++ b/src/input_common/mouse/mouse_input.cpp
@@ -0,0 +1,125 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "common/logging/log.h"
+#include "common/math_util.h"
+#include "common/param_package.h"
+#include "input_common/mouse/mouse_input.h"
+
+namespace MouseInput {
+
+Mouse::Mouse() {
+    update_thread = std::thread(&Mouse::UpdateThread, this);
+}
+
+Mouse::~Mouse() {
+    update_thread_running = false;
+    if (update_thread.joinable()) {
+        update_thread.join();
+    }
+}
+
+void Mouse::UpdateThread() {
+    constexpr int update_time = 10;
+    while (update_thread_running) {
+        for (MouseInfo& info : mouse_info) {
+            Common::Vec3f angular_direction = {-info.tilt_direction.y, 0.0f,
+                                               -info.tilt_direction.x};
+
+            info.motion.SetGyroscope(angular_direction * info.tilt_speed);
+            info.motion.UpdateRotation(update_time * 1000);
+            info.motion.UpdateOrientation(update_time * 1000);
+            info.tilt_speed = 0;
+            info.data.motion = info.motion.GetMotion();
+        }
+        if (configuring) {
+            UpdateYuzuSettings();
+        }
+        std::this_thread::sleep_for(std::chrono::milliseconds(update_time));
+    }
+}
+
+void Mouse::UpdateYuzuSettings() {
+    MouseStatus pad_status{};
+    if (buttons != 0) {
+        pad_status.button = last_button;
+        mouse_queue.Push(pad_status);
+    }
+}
+
+void Mouse::PressButton(int x, int y, int button_) {
+    if (button_ >= static_cast<int>(mouse_info.size())) {
+        return;
+    }
+
+    int button = 1 << button_;
+    buttons |= static_cast<u16>(button);
+    last_button = static_cast<MouseButton>(button_);
+
+    mouse_info[button_].mouse_origin = Common::MakeVec(x, y);
+    mouse_info[button_].last_mouse_position = Common::MakeVec(x, y);
+    mouse_info[button_].data.pressed = true;
+}
+
+void Mouse::MouseMove(int x, int y) {
+    for (MouseInfo& info : mouse_info) {
+        if (info.data.pressed) {
+            auto mouse_move = Common::MakeVec(x, y) - info.mouse_origin;
+            auto mouse_change = Common::MakeVec(x, y) - info.last_mouse_position;
+            info.last_mouse_position = Common::MakeVec(x, y);
+            info.data.axis = {mouse_move.x, -mouse_move.y};
+
+            if (mouse_change.x == 0 && mouse_change.y == 0) {
+                info.tilt_speed = 0;
+            } else {
+                info.tilt_direction = mouse_change.Cast<float>();
+                info.tilt_speed = info.tilt_direction.Normalize() * info.sensitivity;
+            }
+        }
+    }
+}
+
+void Mouse::ReleaseButton(int button_) {
+    if (button_ >= static_cast<int>(mouse_info.size())) {
+        return;
+    }
+
+    int button = 1 << button_;
+    buttons &= static_cast<u16>(0xFF - button);
+
+    mouse_info[button_].tilt_speed = 0;
+    mouse_info[button_].data.pressed = false;
+    mouse_info[button_].data.axis = {0, 0};
+}
+
+void Mouse::BeginConfiguration() {
+    buttons = 0;
+    last_button = MouseButton::Undefined;
+    mouse_queue.Clear();
+    configuring = true;
+}
+
+void Mouse::EndConfiguration() {
+    buttons = 0;
+    last_button = MouseButton::Undefined;
+    mouse_queue.Clear();
+    configuring = false;
+}
+
+Common::SPSCQueue<MouseStatus>& Mouse::GetMouseQueue() {
+    return mouse_queue;
+}
+
+const Common::SPSCQueue<MouseStatus>& Mouse::GetMouseQueue() const {
+    return mouse_queue;
+}
+
+MouseData& Mouse::GetMouseState(std::size_t button) {
+    return mouse_info[button].data;
+}
+
+const MouseData& Mouse::GetMouseState(std::size_t button) const {
+    return mouse_info[button].data;
+}
+} // namespace MouseInput
diff --git a/src/input_common/mouse/mouse_input.h b/src/input_common/mouse/mouse_input.h
new file mode 100644
index 000000000..761663334
--- /dev/null
+++ b/src/input_common/mouse/mouse_input.h
@@ -0,0 +1,99 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <algorithm>
+#include <functional>
+#include <mutex>
+#include <thread>
+#include <unordered_map>
+#include "common/common_types.h"
+#include "common/threadsafe_queue.h"
+#include "core/frontend/input.h"
+#include "input_common/main.h"
+#include "input_common/motion_input.h"
+
+namespace MouseInput {
+
+enum class MouseButton {
+    Left,
+    Wheel,
+    Right,
+    Foward,
+    Backward,
+    Undefined,
+};
+
+struct MouseStatus {
+    MouseButton button{MouseButton::Undefined};
+};
+
+struct MouseData {
+    bool pressed{};
+    std::array<int, 2> axis{};
+    Input::MotionStatus motion{};
+    Input::TouchStatus touch{};
+};
+
+class Mouse {
+public:
+    Mouse();
+    ~Mouse();
+
+    /// Used for polling
+    void BeginConfiguration();
+    void EndConfiguration();
+
+    /**
+     * Signals that a button is pressed.
+     * @param x the x-coordinate of the cursor
+     * @param y the y-coordinate of the cursor
+     * @param button the button pressed
+     */
+    void PressButton(int x, int y, int button_);
+
+    /**
+     * Signals that mouse has moved.
+     * @param x the x-coordinate of the cursor
+     * @param y the y-coordinate of the cursor
+     */
+    void MouseMove(int x, int y);
+
+    /**
+     * Signals that a motion sensor tilt has ended.
+     */
+    void ReleaseButton(int button_);
+
+    [[nodiscard]] Common::SPSCQueue<MouseStatus>& GetMouseQueue();
+    [[nodiscard]] const Common::SPSCQueue<MouseStatus>& GetMouseQueue() const;
+
+    [[nodiscard]] MouseData& GetMouseState(std::size_t button);
+    [[nodiscard]] const MouseData& GetMouseState(std::size_t button) const;
+
+private:
+    void UpdateThread();
+    void UpdateYuzuSettings();
+
+    struct MouseInfo {
+        InputCommon::MotionInput motion{0.0f, 0.0f, 0.0f};
+        Common::Vec2<int> mouse_origin;
+        Common::Vec2<int> last_mouse_position;
+        bool is_tilting = false;
+        float sensitivity{0.120f};
+
+        float tilt_speed = 0;
+        Common::Vec2<float> tilt_direction;
+        MouseData data;
+    };
+
+    u16 buttons{};
+    std::thread update_thread;
+    MouseButton last_button{MouseButton::Undefined};
+    std::array<MouseInfo, 5> mouse_info;
+    Common::SPSCQueue<MouseStatus> mouse_queue;
+    bool configuring{false};
+    bool update_thread_running{true};
+};
+} // namespace MouseInput
diff --git a/src/input_common/mouse/mouse_poller.cpp b/src/input_common/mouse/mouse_poller.cpp
new file mode 100644
index 000000000..6213f3dbd
--- /dev/null
+++ b/src/input_common/mouse/mouse_poller.cpp
@@ -0,0 +1,261 @@
+// 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/mouse/mouse_input.h"
+#include "input_common/mouse/mouse_poller.h"
+
+namespace InputCommon {
+
+class MouseButton final : public Input::ButtonDevice {
+public:
+    explicit MouseButton(u32 button_, const MouseInput::Mouse* mouse_input_)
+        : button(button_), mouse_input(mouse_input_) {}
+
+    bool GetStatus() const override {
+        return mouse_input->GetMouseState(button).pressed;
+    }
+
+private:
+    const u32 button;
+    const MouseInput::Mouse* mouse_input;
+};
+
+MouseButtonFactory::MouseButtonFactory(std::shared_ptr<MouseInput::Mouse> mouse_input_)
+    : mouse_input(std::move(mouse_input_)) {}
+
+std::unique_ptr<Input::ButtonDevice> MouseButtonFactory::Create(
+    const Common::ParamPackage& params) {
+    const auto button_id = params.Get("button", 0);
+
+    return std::make_unique<MouseButton>(button_id, mouse_input.get());
+}
+
+Common::ParamPackage MouseButtonFactory::GetNextInput() const {
+    MouseInput::MouseStatus pad;
+    Common::ParamPackage params;
+    auto& queue = mouse_input->GetMouseQueue();
+    while (queue.Pop(pad)) {
+        // This while loop will break on the earliest detected button
+        if (pad.button != MouseInput::MouseButton::Undefined) {
+            params.Set("engine", "mouse");
+            params.Set("button", static_cast<u16>(pad.button));
+            return params;
+        }
+    }
+    return params;
+}
+
+void MouseButtonFactory::BeginConfiguration() {
+    polling = true;
+    mouse_input->BeginConfiguration();
+}
+
+void MouseButtonFactory::EndConfiguration() {
+    polling = false;
+    mouse_input->EndConfiguration();
+}
+
+class MouseAnalog final : public Input::AnalogDevice {
+public:
+    explicit MouseAnalog(u32 port_, u32 axis_x_, u32 axis_y_, float deadzone_, float range_,
+                         const MouseInput::Mouse* mouse_input_)
+        : button(port_), axis_x(axis_x_), axis_y(axis_y_), deadzone(deadzone_), range(range_),
+          mouse_input(mouse_input_) {}
+
+    float GetAxis(u32 axis) const {
+        std::lock_guard lock{mutex};
+        const auto axis_value =
+            static_cast<float>(mouse_input->GetMouseState(button).axis.at(axis));
+        return axis_value / (100.0f * range);
+    }
+
+    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 button;
+    const u32 axis_x;
+    const u32 axis_y;
+    const float deadzone;
+    const float range;
+    const MouseInput::Mouse* mouse_input;
+    mutable std::mutex mutex;
+};
+
+/// An analog device factory that creates analog devices from GC Adapter
+MouseAnalogFactory::MouseAnalogFactory(std::shared_ptr<MouseInput::Mouse> mouse_input_)
+    : mouse_input(std::move(mouse_input_)) {}
+
+/**
+ * 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> MouseAnalogFactory::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);
+    const auto range = std::clamp(params.Get("range", 1.0f), 0.50f, 1.50f);
+
+    return std::make_unique<MouseAnalog>(port, axis_x, axis_y, deadzone, range, mouse_input.get());
+}
+
+void MouseAnalogFactory::BeginConfiguration() {
+    polling = true;
+    mouse_input->BeginConfiguration();
+}
+
+void MouseAnalogFactory::EndConfiguration() {
+    polling = false;
+    mouse_input->EndConfiguration();
+}
+
+Common::ParamPackage MouseAnalogFactory::GetNextInput() const {
+    MouseInput::MouseStatus pad;
+    Common::ParamPackage params;
+    auto& queue = mouse_input->GetMouseQueue();
+    while (queue.Pop(pad)) {
+        // This while loop will break on the earliest detected button
+        if (pad.button != MouseInput::MouseButton::Undefined) {
+            params.Set("engine", "mouse");
+            params.Set("port", static_cast<u16>(pad.button));
+            params.Set("axis_x", 0);
+            params.Set("axis_y", 1);
+            return params;
+        }
+    }
+    return params;
+}
+
+class MouseMotion final : public Input::MotionDevice {
+public:
+    explicit MouseMotion(u32 button_, const MouseInput::Mouse* mouse_input_)
+        : button(button_), mouse_input(mouse_input_) {}
+
+    Input::MotionStatus GetStatus() const override {
+        return mouse_input->GetMouseState(button).motion;
+    }
+
+private:
+    const u32 button;
+    const MouseInput::Mouse* mouse_input;
+};
+
+MouseMotionFactory::MouseMotionFactory(std::shared_ptr<MouseInput::Mouse> mouse_input_)
+    : mouse_input(std::move(mouse_input_)) {}
+
+std::unique_ptr<Input::MotionDevice> MouseMotionFactory::Create(
+    const Common::ParamPackage& params) {
+    const auto button_id = params.Get("button", 0);
+
+    return std::make_unique<MouseMotion>(button_id, mouse_input.get());
+}
+
+Common::ParamPackage MouseMotionFactory::GetNextInput() const {
+    MouseInput::MouseStatus pad;
+    Common::ParamPackage params;
+    auto& queue = mouse_input->GetMouseQueue();
+    while (queue.Pop(pad)) {
+        // This while loop will break on the earliest detected button
+        if (pad.button != MouseInput::MouseButton::Undefined) {
+            params.Set("engine", "mouse");
+            params.Set("button", static_cast<u16>(pad.button));
+            return params;
+        }
+    }
+    return params;
+}
+
+void MouseMotionFactory::BeginConfiguration() {
+    polling = true;
+    mouse_input->BeginConfiguration();
+}
+
+void MouseMotionFactory::EndConfiguration() {
+    polling = false;
+    mouse_input->EndConfiguration();
+}
+
+class MouseTouch final : public Input::TouchDevice {
+public:
+    explicit MouseTouch(u32 button_, const MouseInput::Mouse* mouse_input_)
+        : button(button_), mouse_input(mouse_input_) {}
+
+    Input::TouchStatus GetStatus() const override {
+        return mouse_input->GetMouseState(button).touch;
+    }
+
+private:
+    const u32 button;
+    const MouseInput::Mouse* mouse_input;
+};
+
+MouseTouchFactory::MouseTouchFactory(std::shared_ptr<MouseInput::Mouse> mouse_input_)
+    : mouse_input(std::move(mouse_input_)) {}
+
+std::unique_ptr<Input::TouchDevice> MouseTouchFactory::Create(const Common::ParamPackage& params) {
+    const auto button_id = params.Get("button", 0);
+
+    return std::make_unique<MouseTouch>(button_id, mouse_input.get());
+}
+
+Common::ParamPackage MouseTouchFactory::GetNextInput() const {
+    MouseInput::MouseStatus pad;
+    Common::ParamPackage params;
+    auto& queue = mouse_input->GetMouseQueue();
+    while (queue.Pop(pad)) {
+        // This while loop will break on the earliest detected button
+        if (pad.button != MouseInput::MouseButton::Undefined) {
+            params.Set("engine", "mouse");
+            params.Set("button", static_cast<u16>(pad.button));
+            return params;
+        }
+    }
+    return params;
+}
+
+void MouseTouchFactory::BeginConfiguration() {
+    polling = true;
+    mouse_input->BeginConfiguration();
+}
+
+void MouseTouchFactory::EndConfiguration() {
+    polling = false;
+    mouse_input->EndConfiguration();
+}
+
+} // namespace InputCommon
diff --git a/src/input_common/mouse/mouse_poller.h b/src/input_common/mouse/mouse_poller.h
new file mode 100644
index 000000000..cf331293b
--- /dev/null
+++ b/src/input_common/mouse/mouse_poller.h
@@ -0,0 +1,109 @@
+// Copyright 2020 yuzu 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"
+#include "input_common/mouse/mouse_input.h"
+
+namespace InputCommon {
+
+/**
+ * A button device factory representing a mouse. It receives mouse events and forward them
+ * to all button devices it created.
+ */
+class MouseButtonFactory final : public Input::Factory<Input::ButtonDevice> {
+public:
+    explicit MouseButtonFactory(std::shared_ptr<MouseInput::Mouse> mouse_input_);
+
+    /**
+     * Creates a button device from a button press
+     * @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;
+
+    Common::ParamPackage GetNextInput() const;
+
+    /// For device input configuration/polling
+    void BeginConfiguration();
+    void EndConfiguration();
+
+    bool IsPolling() const {
+        return polling;
+    }
+
+private:
+    std::shared_ptr<MouseInput::Mouse> mouse_input;
+    bool polling = false;
+};
+
+/// An analog device factory that creates analog devices from mouse
+class MouseAnalogFactory final : public Input::Factory<Input::AnalogDevice> {
+public:
+    explicit MouseAnalogFactory(std::shared_ptr<MouseInput::Mouse> mouse_input_);
+
+    std::unique_ptr<Input::AnalogDevice> Create(const Common::ParamPackage& params) override;
+
+    Common::ParamPackage GetNextInput() const;
+
+    /// For device input configuration/polling
+    void BeginConfiguration();
+    void EndConfiguration();
+
+    bool IsPolling() const {
+        return polling;
+    }
+
+private:
+    std::shared_ptr<MouseInput::Mouse> mouse_input;
+    bool polling = false;
+};
+
+/// A motion device factory that creates motion devices from mouse
+class MouseMotionFactory final : public Input::Factory<Input::MotionDevice> {
+public:
+    explicit MouseMotionFactory(std::shared_ptr<MouseInput::Mouse> mouse_input_);
+
+    std::unique_ptr<Input::MotionDevice> Create(const Common::ParamPackage& params) override;
+
+    Common::ParamPackage GetNextInput() const;
+
+    /// For device input configuration/polling
+    void BeginConfiguration();
+    void EndConfiguration();
+
+    bool IsPolling() const {
+        return polling;
+    }
+
+private:
+    std::shared_ptr<MouseInput::Mouse> mouse_input;
+    bool polling = false;
+};
+
+/// An touch device factory that creates touch devices from mouse
+class MouseTouchFactory final : public Input::Factory<Input::TouchDevice> {
+public:
+    explicit MouseTouchFactory(std::shared_ptr<MouseInput::Mouse> mouse_input_);
+
+    std::unique_ptr<Input::TouchDevice> Create(const Common::ParamPackage& params) override;
+
+    Common::ParamPackage GetNextInput() const;
+
+    /// For device input configuration/polling
+    void BeginConfiguration();
+    void EndConfiguration();
+
+    bool IsPolling() const {
+        return polling;
+    }
+
+private:
+    std::shared_ptr<MouseInput::Mouse> mouse_input;
+    bool polling = false;
+};
+
+} // namespace InputCommon