1 files changed, 207 insertions, 0 deletions

diff --git a/src/input_common/input_mapping.cpp b/src/input_common/input_mapping.cpp
new file mode 100644
index 000000000..6e0024b2d
--- /dev/null
+++ b/src/input_common/input_mapping.cpp
@@ -0,0 +1,207 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included
+
+#include "common/common_types.h"
+#include "common/settings.h"
+#include "input_common/input_engine.h"
+#include "input_common/input_mapping.h"
+
+namespace InputCommon {
+
+MappingFactory::MappingFactory() {}
+
+void MappingFactory::BeginMapping(Polling::InputType type) {
+    is_enabled = true;
+    input_type = type;
+    input_queue.Clear();
+    first_axis = -1;
+    second_axis = -1;
+}
+
+[[nodiscard]] const 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 != Common::UUID{}) {
+        new_input.Set("guid", data.pad.guid.Format());
+    }
+    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 != Common::UUID{}) {
+        new_input.Set("guid", data.pad.guid.Format());
+    }
+    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 != Common::UUID{}) {
+        new_input.Set("guid", data.pad.guid.Format());
+    }
+    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:
+    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 == "tas") {
+        return false;
+    }
+    if (data.engine == "touch") {
+        return false;
+    }
+    if (data.engine == "touch_from_button") {
+        return false;
+    }
+    if (data.engine == "analog_from_button") {
+        return false;
+    }
+    return true;
+}
+
+} // namespace InputCommon