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-rw-r--r--src/core/CMakeLists.txt2
-rw-r--r--src/core/frontend/input_interpreter.cpp45
-rw-r--r--src/core/frontend/input_interpreter.h120
3 files changed, 167 insertions, 0 deletions
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 949748178..56c165336 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -135,6 +135,8 @@ add_library(core STATIC
frontend/emu_window.h
frontend/framebuffer_layout.cpp
frontend/framebuffer_layout.h
+ frontend/input_interpreter.cpp
+ frontend/input_interpreter.h
frontend/input.h
hardware_interrupt_manager.cpp
hardware_interrupt_manager.h
diff --git a/src/core/frontend/input_interpreter.cpp b/src/core/frontend/input_interpreter.cpp
new file mode 100644
index 000000000..66ae506cd
--- /dev/null
+++ b/src/core/frontend/input_interpreter.cpp
@@ -0,0 +1,45 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/core.h"
+#include "core/frontend/input_interpreter.h"
+#include "core/hle/service/hid/controllers/npad.h"
+#include "core/hle/service/hid/hid.h"
+#include "core/hle/service/sm/sm.h"
+
+InputInterpreter::InputInterpreter(Core::System& system)
+ : npad{system.ServiceManager()
+ .GetService<Service::HID::Hid>("hid")
+ ->GetAppletResource()
+ ->GetController<Service::HID::Controller_NPad>(Service::HID::HidController::NPad)} {}
+
+InputInterpreter::~InputInterpreter() = default;
+
+void InputInterpreter::PollInput() {
+ const u32 button_state = npad.GetAndResetPressState();
+
+ previous_index = current_index;
+ current_index = (current_index + 1) % button_states.size();
+
+ button_states[current_index] = button_state;
+}
+
+bool InputInterpreter::IsButtonPressedOnce(HIDButton button) const {
+ const bool current_press =
+ (button_states[current_index] & (1U << static_cast<u8>(button))) != 0;
+ const bool previous_press =
+ (button_states[previous_index] & (1U << static_cast<u8>(button))) != 0;
+
+ return current_press && !previous_press;
+}
+
+bool InputInterpreter::IsButtonHeld(HIDButton button) const {
+ u32 held_buttons{button_states[0]};
+
+ for (std::size_t i = 1; i < button_states.size(); ++i) {
+ held_buttons &= button_states[i];
+ }
+
+ return (held_buttons & (1U << static_cast<u8>(button))) != 0;
+}
diff --git a/src/core/frontend/input_interpreter.h b/src/core/frontend/input_interpreter.h
new file mode 100644
index 000000000..fea9aebe6
--- /dev/null
+++ b/src/core/frontend/input_interpreter.h
@@ -0,0 +1,120 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+
+#include "common/common_types.h"
+
+namespace Core {
+class System;
+}
+
+namespace Service::HID {
+class Controller_NPad;
+}
+
+enum class HIDButton : u8 {
+ A,
+ B,
+ X,
+ Y,
+ LStick,
+ RStick,
+ L,
+ R,
+ ZL,
+ ZR,
+ Plus,
+ Minus,
+
+ DLeft,
+ DUp,
+ DRight,
+ DDown,
+
+ LStickLeft,
+ LStickUp,
+ LStickRight,
+ LStickDown,
+
+ RStickLeft,
+ RStickUp,
+ RStickRight,
+ RStickDown,
+
+ LeftSL,
+ LeftSR,
+
+ RightSL,
+ RightSR,
+};
+
+/**
+ * The InputInterpreter class interfaces with HID to retrieve button press states.
+ * Input is intended to be polled every 50ms so that a button is considered to be
+ * held down after 400ms has elapsed since the initial button press and subsequent
+ * repeated presses occur every 50ms.
+ */
+class InputInterpreter {
+public:
+ explicit InputInterpreter(Core::System& system);
+ virtual ~InputInterpreter();
+
+ /// Gets a button state from HID and inserts it into the array of button states.
+ void PollInput();
+
+ /**
+ * The specified button is considered to be pressed once
+ * if it is currently pressed and not pressed previously.
+ *
+ * @param button The button to check.
+ *
+ * @returns True when the button is pressed once.
+ */
+ [[nodiscard]] bool IsButtonPressedOnce(HIDButton button) const;
+
+ /**
+ * Checks whether any of the buttons in the parameter list is pressed once.
+ *
+ * @tparam HIDButton The buttons to check.
+ *
+ * @returns True when at least one of the buttons is pressed once.
+ */
+ template <HIDButton... T>
+ [[nodiscard]] bool IsAnyButtonPressedOnce() {
+ return (IsButtonPressedOnce(T) || ...);
+ }
+
+ /**
+ * The specified button is considered to be held down if it is pressed in all 9 button states.
+ *
+ * @param button The button to check.
+ *
+ * @returns True when the button is held down.
+ */
+ [[nodiscard]] bool IsButtonHeld(HIDButton button) const;
+
+ /**
+ * Checks whether any of the buttons in the parameter list is held down.
+ *
+ * @tparam HIDButton The buttons to check.
+ *
+ * @returns True when at least one of the buttons is held down.
+ */
+ template <HIDButton... T>
+ [[nodiscard]] bool IsAnyButtonHeld() {
+ return (IsButtonHeld(T) || ...);
+ }
+
+private:
+ Service::HID::Controller_NPad& npad;
+
+ /// Stores 9 consecutive button states polled from HID.
+ std::array<u32, 9> button_states{};
+
+ std::size_t previous_index{};
+ std::size_t current_index{};
+};