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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 <mutex>
#include <thread>
#include <unordered_map>
#include <SDL.h>
#include "common/common_types.h"
#include "common/threadsafe_queue.h"
#include "input_common/input_engine.h"
union SDL_Event;
using SDL_GameController = struct _SDL_GameController;
using SDL_Joystick = struct _SDL_Joystick;
using SDL_JoystickID = s32;
namespace InputCommon {
class SDLJoystick;
using ButtonBindings =
std::array<std::pair<Settings::NativeButton::Values, SDL_GameControllerButton>, 18>;
using ZButtonBindings =
std::array<std::pair<Settings::NativeButton::Values, SDL_GameControllerAxis>, 2>;
class SDLDriver : public InputEngine {
public:
/// Initializes and registers SDL device factories
explicit SDLDriver(std::string input_engine_);
/// Unregisters SDL device factories and shut them down.
~SDLDriver() 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);
std::vector<Common::ParamPackage> GetInputDevices() const override;
ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& params) override;
AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& params) override;
MotionMapping GetMotionMappingForDevice(const Common::ParamPackage& params) override;
Common::Input::ButtonNames GetUIName(const Common::ParamPackage& params) const override;
std::string GetHatButtonName(u8 direction_value) const override;
u8 GetHatButtonId(const std::string& direction_name) const override;
bool IsStickInverted(const Common::ParamPackage& params) override;
Common::Input::VibrationError SetRumble(
const PadIdentifier& identifier, const Common::Input::VibrationStatus& vibration) override;
private:
struct VibrationRequest {
PadIdentifier identifier;
Common::Input::VibrationStatus vibration;
};
void InitJoystick(int joystick_index);
void CloseJoystick(SDL_Joystick* sdl_joystick);
/// Needs to be called before SDL_QuitSubSystem.
void CloseJoysticks();
/// Takes all vibrations from the queue and sends the command to the controller
void SendVibrations();
Common::ParamPackage BuildAnalogParamPackageForButton(int port, std::string guid, s32 axis,
float value = 0.1f) const;
Common::ParamPackage BuildButtonParamPackageForButton(int port, std::string guid,
s32 button) const;
Common::ParamPackage BuildHatParamPackageForButton(int port, std::string guid, s32 hat,
u8 value) const;
Common::ParamPackage BuildMotionParam(int port, std::string guid) const;
Common::ParamPackage BuildParamPackageForBinding(
int port, const std::string& guid, const SDL_GameControllerButtonBind& binding) const;
Common::ParamPackage BuildParamPackageForAnalog(PadIdentifier identifier, int axis_x,
int axis_y, float offset_x,
float offset_y) const;
/// 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;
/// Queue of vibration request to controllers
Common::SPSCQueue<VibrationRequest> vibration_queue;
/// 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;
bool start_thread = false;
std::atomic<bool> initialized = false;
std::thread poll_thread;
};
} // namespace InputCommon
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