suyu/src/core/frontend/input_interpreter.cpp
Morph f9653a4417 frontend/input_interpreter: Add InputInterpreter API
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.

Co-authored-by: Chloe <25727384+ogniK5377@users.noreply.github.com>
2020-12-18 10:33:28 -05:00

45 lines
1.5 KiB
C++

// 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;
}