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// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <atomic>
#include <memory>
#include <mutex>
#include <thread>
#include <unordered_map>
#include <SDL.h>
#include "common/common_types.h"
#include "common/threadsafe_queue.h"
#include "input_common/sdl/sdl.h"
union SDL_Event;
using SDL_GameController = struct _SDL_GameController;
using SDL_Joystick = struct _SDL_Joystick;
using SDL_JoystickID = s32;
using ButtonBindings =
std::array<std::pair<Settings::NativeButton::Values, SDL_GameControllerButton>, 17>;
using ZButtonBindings =
std::array<std::pair<Settings::NativeButton::Values, SDL_GameControllerAxis>, 2>;
namespace InputCommon::SDL {
class SDLAnalogFactory;
class SDLButtonFactory;
class SDLMotionFactory;
class SDLVibrationFactory;
class SDLJoystick;
class SDLState : public State {
public:
/// Initializes and registers SDL device factories
SDLState();
/// Unregisters SDL device factories and shut them down.
~SDLState() override;
/// Handle SDL_Events for joysticks from SDL_PollEvent
void HandleGameControllerEvent(const SDL_Event& event);
/// Get the nth joystick with the corresponding GUID
std::shared_ptr<SDLJoystick> GetSDLJoystickBySDLID(SDL_JoystickID sdl_id);
/**
* Check how many identical joysticks (by guid) were connected before the one with sdl_id and so
* tie it to a SDLJoystick with the same guid and that port
*/
std::shared_ptr<SDLJoystick> GetSDLJoystickByGUID(const std::string& guid, int port);
/// Get all DevicePoller that use the SDL backend for a specific device type
Pollers GetPollers(Polling::DeviceType type) override;
/// Used by the Pollers during config
std::atomic<bool> polling = false;
Common::SPSCQueue<SDL_Event> event_queue;
std::vector<Common::ParamPackage> GetInputDevices() override;
ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& params) override;
AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& params) override;
MotionMapping GetMotionMappingForDevice(const Common::ParamPackage& params) override;
private:
void InitJoystick(int joystick_index);
void CloseJoystick(SDL_Joystick* sdl_joystick);
/// Needs to be called before SDL_QuitSubSystem.
void CloseJoysticks();
/// Returns the default button bindings list for generic controllers
ButtonBindings GetDefaultButtonBinding() const;
/// Returns the default button bindings list for nintendo controllers
ButtonBindings GetNintendoButtonBinding(const std::shared_ptr<SDLJoystick>& joystick) const;
/// Returns the button mappings from a single controller
ButtonMapping GetSingleControllerMapping(const std::shared_ptr<SDLJoystick>& joystick,
const ButtonBindings& switch_to_sdl_button,
const ZButtonBindings& switch_to_sdl_axis) const;
/// Returns the button mappings from two different controllers
ButtonMapping GetDualControllerMapping(const std::shared_ptr<SDLJoystick>& joystick,
const std::shared_ptr<SDLJoystick>& joystick2,
const ButtonBindings& switch_to_sdl_button,
const ZButtonBindings& switch_to_sdl_axis) const;
/// Returns true if the button is on the left joycon
bool IsButtonOnLeftSide(Settings::NativeButton::Values button) const;
// Set to true if SDL supports game controller subsystem
bool has_gamecontroller = false;
/// Map of GUID of a list of corresponding virtual Joysticks
std::unordered_map<std::string, std::vector<std::shared_ptr<SDLJoystick>>> joystick_map;
std::mutex joystick_map_mutex;
std::shared_ptr<SDLButtonFactory> button_factory;
std::shared_ptr<SDLAnalogFactory> analog_factory;
std::shared_ptr<SDLVibrationFactory> vibration_factory;
std::shared_ptr<SDLMotionFactory> motion_factory;
bool start_thread = false;
std::atomic<bool> initialized = false;
std::thread poll_thread;
};
} // namespace InputCommon::SDL
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