1 files changed, 483 insertions, 0 deletions
diff --git a/src/hid_core/frontend/emulated_devices.cpp b/src/hid_core/frontend/emulated_devices.cpp
new file mode 100644
index 000000000..a827aa9b7
--- /dev/null
+++ b/src/hid_core/frontend/emulated_devices.cpp
@@ -0,0 +1,483 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <algorithm>
+#include <fmt/format.h>
+
+#include "hid_core/frontend/emulated_devices.h"
+#include "hid_core/frontend/input_converter.h"
+
+namespace Core::HID {
+
+EmulatedDevices::EmulatedDevices() = default;
+
+EmulatedDevices::~EmulatedDevices() = default;
+
+void EmulatedDevices::ReloadFromSettings() {
+    ReloadInput();
+}
+
+void EmulatedDevices::ReloadInput() {
+    // If you load any device here add the equivalent to the UnloadInput() function
+
+    // Native Mouse is mapped on port 1, pad 0
+    const Common::ParamPackage mouse_params{"engine:mouse,port:1,pad:0"};
+
+    // Keyboard keys is mapped on port 1, pad 0 for normal keys, pad 1 for moddifier keys
+    const Common::ParamPackage keyboard_params{"engine:keyboard,port:1"};
+
+    std::size_t key_index = 0;
+    for (auto& mouse_device : mouse_button_devices) {
+        Common::ParamPackage mouse_button_params = mouse_params;
+        mouse_button_params.Set("button", static_cast<int>(key_index));
+        mouse_device = Common::Input::CreateInputDevice(mouse_button_params);
+        key_index++;
+    }
+
+    Common::ParamPackage mouse_position_params = mouse_params;
+    mouse_position_params.Set("axis_x", 0);
+    mouse_position_params.Set("axis_y", 1);
+    mouse_position_params.Set("deadzone", 0.0f);
+    mouse_position_params.Set("range", 1.0f);
+    mouse_position_params.Set("threshold", 0.0f);
+    mouse_stick_device = Common::Input::CreateInputDevice(mouse_position_params);
+
+    // First two axis are reserved for mouse position
+    key_index = 2;
+    for (auto& mouse_device : mouse_wheel_devices) {
+        Common::ParamPackage mouse_wheel_params = mouse_params;
+        mouse_wheel_params.Set("axis", static_cast<int>(key_index));
+        mouse_device = Common::Input::CreateInputDevice(mouse_wheel_params);
+        key_index++;
+    }
+
+    key_index = 0;
+    for (auto& keyboard_device : keyboard_devices) {
+        Common::ParamPackage keyboard_key_params = keyboard_params;
+        keyboard_key_params.Set("button", static_cast<int>(key_index));
+        keyboard_key_params.Set("pad", 0);
+        keyboard_device = Common::Input::CreateInputDevice(keyboard_key_params);
+        key_index++;
+    }
+
+    key_index = 0;
+    for (auto& keyboard_device : keyboard_modifier_devices) {
+        Common::ParamPackage keyboard_moddifier_params = keyboard_params;
+        keyboard_moddifier_params.Set("button", static_cast<int>(key_index));
+        keyboard_moddifier_params.Set("pad", 1);
+        keyboard_device = Common::Input::CreateInputDevice(keyboard_moddifier_params);
+        key_index++;
+    }
+
+    for (std::size_t index = 0; index < mouse_button_devices.size(); ++index) {
+        if (!mouse_button_devices[index]) {
+            continue;
+        }
+        mouse_button_devices[index]->SetCallback({
+            .on_change =
+                [this, index](const Common::Input::CallbackStatus& callback) {
+                    SetMouseButton(callback, index);
+                },
+        });
+    }
+
+    for (std::size_t index = 0; index < mouse_wheel_devices.size(); ++index) {
+        if (!mouse_wheel_devices[index]) {
+            continue;
+        }
+        mouse_wheel_devices[index]->SetCallback({
+            .on_change =
+                [this, index](const Common::Input::CallbackStatus& callback) {
+                    SetMouseWheel(callback, index);
+                },
+        });
+    }
+
+    if (mouse_stick_device) {
+        mouse_stick_device->SetCallback({
+            .on_change =
+                [this](const Common::Input::CallbackStatus& callback) {
+                    SetMousePosition(callback);
+                },
+        });
+    }
+
+    for (std::size_t index = 0; index < keyboard_devices.size(); ++index) {
+        if (!keyboard_devices[index]) {
+            continue;
+        }
+        keyboard_devices[index]->SetCallback({
+            .on_change =
+                [this, index](const Common::Input::CallbackStatus& callback) {
+                    SetKeyboardButton(callback, index);
+                },
+        });
+    }
+
+    for (std::size_t index = 0; index < keyboard_modifier_devices.size(); ++index) {
+        if (!keyboard_modifier_devices[index]) {
+            continue;
+        }
+        keyboard_modifier_devices[index]->SetCallback({
+            .on_change =
+                [this, index](const Common::Input::CallbackStatus& callback) {
+                    SetKeyboardModifier(callback, index);
+                },
+        });
+    }
+}
+
+void EmulatedDevices::UnloadInput() {
+    for (auto& button : mouse_button_devices) {
+        button.reset();
+    }
+    for (auto& analog : mouse_wheel_devices) {
+        analog.reset();
+    }
+    mouse_stick_device.reset();
+    for (auto& button : keyboard_devices) {
+        button.reset();
+    }
+    for (auto& button : keyboard_modifier_devices) {
+        button.reset();
+    }
+}
+
+void EmulatedDevices::EnableConfiguration() {
+    is_configuring = true;
+    SaveCurrentConfig();
+}
+
+void EmulatedDevices::DisableConfiguration() {
+    is_configuring = false;
+}
+
+bool EmulatedDevices::IsConfiguring() const {
+    return is_configuring;
+}
+
+void EmulatedDevices::SaveCurrentConfig() {
+    if (!is_configuring) {
+        return;
+    }
+}
+
+void EmulatedDevices::RestoreConfig() {
+    if (!is_configuring) {
+        return;
+    }
+    ReloadFromSettings();
+}
+
+void EmulatedDevices::SetKeyboardButton(const Common::Input::CallbackStatus& callback,
+                                        std::size_t index) {
+    if (index >= device_status.keyboard_values.size()) {
+        return;
+    }
+    std::unique_lock lock{mutex};
+    bool value_changed = false;
+    const auto new_status = TransformToButton(callback);
+    auto& current_status = device_status.keyboard_values[index];
+    current_status.toggle = new_status.toggle;
+
+    // Update button status with current status
+    if (!current_status.toggle) {
+        current_status.locked = false;
+        if (current_status.value != new_status.value) {
+            current_status.value = new_status.value;
+            value_changed = true;
+        }
+    } else {
+        // Toggle button and lock status
+        if (new_status.value && !current_status.locked) {
+            current_status.locked = true;
+            current_status.value = !current_status.value;
+            value_changed = true;
+        }
+
+        // Unlock button, ready for next press
+        if (!new_status.value && current_status.locked) {
+            current_status.locked = false;
+        }
+    }
+
+    if (!value_changed) {
+        return;
+    }
+
+    if (is_configuring) {
+        lock.unlock();
+        TriggerOnChange(DeviceTriggerType::Keyboard);
+        return;
+    }
+
+    // Index should be converted from NativeKeyboard to KeyboardKeyIndex
+    UpdateKey(index, current_status.value);
+
+    lock.unlock();
+    TriggerOnChange(DeviceTriggerType::Keyboard);
+}
+
+void EmulatedDevices::UpdateKey(std::size_t key_index, bool status) {
+    constexpr std::size_t KEYS_PER_BYTE = 8;
+    auto& entry = device_status.keyboard_state.key[key_index / KEYS_PER_BYTE];
+    const u8 mask = static_cast<u8>(1 << (key_index % KEYS_PER_BYTE));
+    if (status) {
+        entry = entry | mask;
+    } else {
+        entry = static_cast<u8>(entry & ~mask);
+    }
+}
+
+void EmulatedDevices::SetKeyboardModifier(const Common::Input::CallbackStatus& callback,
+                                          std::size_t index) {
+    if (index >= device_status.keyboard_moddifier_values.size()) {
+        return;
+    }
+    std::unique_lock lock{mutex};
+    bool value_changed = false;
+    const auto new_status = TransformToButton(callback);
+    auto& current_status = device_status.keyboard_moddifier_values[index];
+    current_status.toggle = new_status.toggle;
+
+    // Update button status with current
+    if (!current_status.toggle) {
+        current_status.locked = false;
+        if (current_status.value != new_status.value) {
+            current_status.value = new_status.value;
+            value_changed = true;
+        }
+    } else {
+        // Toggle button and lock status
+        if (new_status.value && !current_status.locked) {
+            current_status.locked = true;
+            current_status.value = !current_status.value;
+            value_changed = true;
+        }
+
+        // Unlock button ready for next press
+        if (!new_status.value && current_status.locked) {
+            current_status.locked = false;
+        }
+    }
+
+    if (!value_changed) {
+        return;
+    }
+
+    if (is_configuring) {
+        lock.unlock();
+        TriggerOnChange(DeviceTriggerType::KeyboardModdifier);
+        return;
+    }
+
+    switch (index) {
+    case Settings::NativeKeyboard::LeftControl:
+    case Settings::NativeKeyboard::RightControl:
+        device_status.keyboard_moddifier_state.control.Assign(current_status.value);
+        break;
+    case Settings::NativeKeyboard::LeftShift:
+    case Settings::NativeKeyboard::RightShift:
+        device_status.keyboard_moddifier_state.shift.Assign(current_status.value);
+        break;
+    case Settings::NativeKeyboard::LeftAlt:
+        device_status.keyboard_moddifier_state.left_alt.Assign(current_status.value);
+        break;
+    case Settings::NativeKeyboard::RightAlt:
+        device_status.keyboard_moddifier_state.right_alt.Assign(current_status.value);
+        break;
+    case Settings::NativeKeyboard::CapsLock:
+        device_status.keyboard_moddifier_state.caps_lock.Assign(current_status.value);
+        break;
+    case Settings::NativeKeyboard::ScrollLock:
+        device_status.keyboard_moddifier_state.scroll_lock.Assign(current_status.value);
+        break;
+    case Settings::NativeKeyboard::NumLock:
+        device_status.keyboard_moddifier_state.num_lock.Assign(current_status.value);
+        break;
+    }
+
+    lock.unlock();
+    TriggerOnChange(DeviceTriggerType::KeyboardModdifier);
+}
+
+void EmulatedDevices::SetMouseButton(const Common::Input::CallbackStatus& callback,
+                                     std::size_t index) {
+    if (index >= device_status.mouse_button_values.size()) {
+        return;
+    }
+    std::unique_lock lock{mutex};
+    bool value_changed = false;
+    const auto new_status = TransformToButton(callback);
+    auto& current_status = device_status.mouse_button_values[index];
+    current_status.toggle = new_status.toggle;
+
+    // Update button status with current
+    if (!current_status.toggle) {
+        current_status.locked = false;
+        if (current_status.value != new_status.value) {
+            current_status.value = new_status.value;
+            value_changed = true;
+        }
+    } else {
+        // Toggle button and lock status
+        if (new_status.value && !current_status.locked) {
+            current_status.locked = true;
+            current_status.value = !current_status.value;
+            value_changed = true;
+        }
+
+        // Unlock button ready for next press
+        if (!new_status.value && current_status.locked) {
+            current_status.locked = false;
+        }
+    }
+
+    if (!value_changed) {
+        return;
+    }
+
+    if (is_configuring) {
+        lock.unlock();
+        TriggerOnChange(DeviceTriggerType::Mouse);
+        return;
+    }
+
+    switch (index) {
+    case Settings::NativeMouseButton::Left:
+        device_status.mouse_button_state.left.Assign(current_status.value);
+        break;
+    case Settings::NativeMouseButton::Right:
+        device_status.mouse_button_state.right.Assign(current_status.value);
+        break;
+    case Settings::NativeMouseButton::Middle:
+        device_status.mouse_button_state.middle.Assign(current_status.value);
+        break;
+    case Settings::NativeMouseButton::Forward:
+        device_status.mouse_button_state.forward.Assign(current_status.value);
+        break;
+    case Settings::NativeMouseButton::Back:
+        device_status.mouse_button_state.back.Assign(current_status.value);
+        break;
+    }
+
+    lock.unlock();
+    TriggerOnChange(DeviceTriggerType::Mouse);
+}
+
+void EmulatedDevices::SetMouseWheel(const Common::Input::CallbackStatus& callback,
+                                    std::size_t index) {
+    if (index >= device_status.mouse_wheel_values.size()) {
+        return;
+    }
+    std::unique_lock lock{mutex};
+    const auto analog_value = TransformToAnalog(callback);
+
+    device_status.mouse_wheel_values[index] = analog_value;
+
+    if (is_configuring) {
+        device_status.mouse_wheel_state = {};
+        lock.unlock();
+        TriggerOnChange(DeviceTriggerType::Mouse);
+        return;
+    }
+
+    switch (index) {
+    case Settings::NativeMouseWheel::X:
+        device_status.mouse_wheel_state.x = static_cast<s32>(analog_value.value);
+        break;
+    case Settings::NativeMouseWheel::Y:
+        device_status.mouse_wheel_state.y = static_cast<s32>(analog_value.value);
+        break;
+    }
+
+    lock.unlock();
+    TriggerOnChange(DeviceTriggerType::Mouse);
+}
+
+void EmulatedDevices::SetMousePosition(const Common::Input::CallbackStatus& callback) {
+    std::unique_lock lock{mutex};
+    const auto touch_value = TransformToTouch(callback);
+
+    device_status.mouse_stick_value = touch_value;
+
+    if (is_configuring) {
+        device_status.mouse_position_state = {};
+        lock.unlock();
+        TriggerOnChange(DeviceTriggerType::Mouse);
+        return;
+    }
+
+    device_status.mouse_position_state.x = touch_value.x.value;
+    device_status.mouse_position_state.y = touch_value.y.value;
+
+    lock.unlock();
+    TriggerOnChange(DeviceTriggerType::Mouse);
+}
+
+KeyboardValues EmulatedDevices::GetKeyboardValues() const {
+    std::scoped_lock lock{mutex};
+    return device_status.keyboard_values;
+}
+
+KeyboardModifierValues EmulatedDevices::GetKeyboardModdifierValues() const {
+    std::scoped_lock lock{mutex};
+    return device_status.keyboard_moddifier_values;
+}
+
+MouseButtonValues EmulatedDevices::GetMouseButtonsValues() const {
+    std::scoped_lock lock{mutex};
+    return device_status.mouse_button_values;
+}
+
+KeyboardKey EmulatedDevices::GetKeyboard() const {
+    std::scoped_lock lock{mutex};
+    return device_status.keyboard_state;
+}
+
+KeyboardModifier EmulatedDevices::GetKeyboardModifier() const {
+    std::scoped_lock lock{mutex};
+    return device_status.keyboard_moddifier_state;
+}
+
+MouseButton EmulatedDevices::GetMouseButtons() const {
+    std::scoped_lock lock{mutex};
+    return device_status.mouse_button_state;
+}
+
+MousePosition EmulatedDevices::GetMousePosition() const {
+    std::scoped_lock lock{mutex};
+    return device_status.mouse_position_state;
+}
+
+AnalogStickState EmulatedDevices::GetMouseWheel() const {
+    std::scoped_lock lock{mutex};
+    return device_status.mouse_wheel_state;
+}
+
+void EmulatedDevices::TriggerOnChange(DeviceTriggerType type) {
+    std::scoped_lock lock{callback_mutex};
+    for (const auto& poller_pair : callback_list) {
+        const InterfaceUpdateCallback& poller = poller_pair.second;
+        if (poller.on_change) {
+            poller.on_change(type);
+        }
+    }
+}
+
+int EmulatedDevices::SetCallback(InterfaceUpdateCallback update_callback) {
+    std::scoped_lock lock{callback_mutex};
+    callback_list.insert_or_assign(last_callback_key, std::move(update_callback));
+    return last_callback_key++;
+}
+
+void EmulatedDevices::DeleteCallback(int key) {
+    std::scoped_lock lock{callback_mutex};
+    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 Core::HID