shadPS4/src/input/controller.h

// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#pragma once

#include <mutex>
#include "common/types.h"

namespace Input {

enum class Axis {
    LeftX = 0,
    LeftY = 1,
    RightX = 2,
    RightY = 3,
    TriggerLeft = 4,
    TriggerRight = 5,

    AxisMax
};

struct State {
    u32 buttonsState = 0;
    u64 time = 0;
    int axes[static_cast<int>(Axis::AxisMax)] = {128, 128, 128, 128, 0, 0};
};

inline int GetAxis(int min, int max, int value) {
    int v = (255 * (value - min)) / (max - min);
    return (v < 0 ? 0 : (v > 255 ? 255 : v));
}

constexpr u32 MAX_STATES = 64;

class GameController {
public:
    GameController();
    virtual ~GameController() = default;

    void ReadState(State* state, bool* isConnected, int* connectedCount);
    int ReadStates(State* states, int states_num, bool* isConnected, int* connectedCount);
    State GetLastState() const;
    void CheckButton(int id, u32 button, bool isPressed);
    void AddState(const State& state);
    void Axis(int id, Input::Axis axis, int value);

private:
    struct StateInternal {
        bool obtained = false;
    };

    std::mutex m_mutex;
    bool m_connected = true;
    State m_last_state;
    int m_connected_count = 0;
    u32 m_states_num = 0;
    u32 m_first_state = 0;
    std::array<State, MAX_STATES> m_states;
    std::array<StateInternal, MAX_STATES> m_private;
};

} // namespace Input