flycast/core/sdl/sdl_gamepad.h

#include "../input/gamepad_device.h"
#include "oslib/oslib.h"
#include "sdl.h"

class DefaultInputMapping : public InputMapping
{
public:
	DefaultInputMapping()
	{
		name = "Default";
		set_button(DC_BTN_Y, 0);
		set_button(DC_BTN_B, 1);
		set_button(DC_BTN_A, 2);
		set_button(DC_BTN_X, 3);
		set_button(DC_BTN_START, 9);

		set_axis(DC_AXIS_X, 0, false);
		set_axis(DC_AXIS_Y, 1, false);
		dirty = false;
	}
};

class Xbox360InputMapping : public InputMapping
{
public:
	Xbox360InputMapping()
	{
		name = "Xbox 360";
		set_button(DC_BTN_A, 0);
		set_button(DC_BTN_B, 1);
		set_button(DC_BTN_X, 2);
		set_button(DC_BTN_Y, 3);
		set_button(DC_BTN_START, 7);

		set_axis(DC_AXIS_X, 0, false);
		set_axis(DC_AXIS_Y, 1, false);
		set_axis(DC_AXIS_LT, 2, false);
		set_axis(DC_AXIS_RT, 5, false);
		set_axis(DC_DPAD_LEFT, 6, false);
		set_axis(DC_DPAD_UP, 7, false);
		dirty = false;
	}
};

class SDLGamepadDevice : public GamepadDevice
{
public:
	SDLGamepadDevice(int maple_port, SDL_Joystick* sdl_joystick) : GamepadDevice(maple_port, "SDL"), sdl_joystick(sdl_joystick)
	{
		_name = SDL_JoystickName(sdl_joystick);
		sdl_joystick_instance = SDL_JoystickInstanceID(sdl_joystick);
		INFO_LOG(INPUT, "SDL: Opened joystick on port %d: '%s'", maple_port, _name.c_str());
		SDL_JoystickGUID guid = SDL_JoystickGetGUID(sdl_joystick);
		char buf[33];
		SDL_JoystickGetGUIDString(guid, buf, sizeof(buf));
		_unique_id = buf;
		if (_unique_id.empty())
			_unique_id = _name;

		if (!find_mapping())
		{
			if (_name == "Microsoft X-Box 360 pad")
			{
				input_mapper = new Xbox360InputMapping();
				INFO_LOG(INPUT, "using Xbox 360 mapping");
			}
			else
			{
				input_mapper = new DefaultInputMapping();
				INFO_LOG(INPUT, "using default mapping");
			}
			save_mapping();
		}
		else
			INFO_LOG(INPUT, "using custom mapping '%s'", input_mapper->name.c_str());
		sdl_haptic = SDL_HapticOpenFromJoystick(sdl_joystick);
		if (SDL_HapticRumbleInit(sdl_haptic) != 0)
		{
			SDL_HapticClose(sdl_haptic);
			sdl_haptic = NULL;
		}

	}

	virtual void rumble(float power, float inclination, u32 duration_ms) override
	{
		if (sdl_haptic != NULL)
		{
			vib_inclination = inclination * power;
			vib_stop_time = os_GetSeconds() + duration_ms / 1000.0;

			SDL_HapticRumblePlay(sdl_haptic, power, duration_ms);
		}
	}
	virtual void update_rumble() override
	{
		if (sdl_haptic == NULL)
			return;
		if (vib_inclination > 0)
		{
			int rem_time = (vib_stop_time - os_GetSeconds()) * 1000;
			if (rem_time <= 0)
				vib_inclination = 0;
			else
				SDL_HapticRumblePlay(sdl_haptic, vib_inclination * rem_time, rem_time);
		}
	}

	void close()
	{
		INFO_LOG(INPUT, "SDL: Joystick '%s' on port %d disconnected", _name.c_str(), maple_port());
		if (sdl_haptic != NULL)
			SDL_HapticClose(sdl_haptic);
		SDL_JoystickClose(sdl_joystick);
		GamepadDevice::Unregister(sdl_gamepads[sdl_joystick_instance]);
		sdl_gamepads.erase(sdl_joystick_instance);
	}

	static void AddSDLGamepad(std::shared_ptr<SDLGamepadDevice> gamepad)
	{
		sdl_gamepads[gamepad->sdl_joystick_instance] = gamepad;
		GamepadDevice::Register(gamepad);
	}
	static std::shared_ptr<SDLGamepadDevice> GetSDLGamepad(SDL_JoystickID id)
	{
		auto it = sdl_gamepads.find(id);
		if (it != sdl_gamepads.end())
			return it->second;
		else
			return NULL;
	}
	static void UpdateRumble()
	{
		for (auto& pair : sdl_gamepads)
			pair.second->update_rumble();
	}

protected:
	virtual void load_axis_min_max(u32 axis) override
	{
		axis_min_values[axis] = -32768;
		axis_ranges[axis] = 65535;
	}

private:
	SDL_Joystick* sdl_joystick;
	SDL_JoystickID sdl_joystick_instance;
	SDL_Haptic *sdl_haptic;
	float vib_inclination = 0;
	double vib_stop_time = 0;
	static std::map<SDL_JoystickID, std::shared_ptr<SDLGamepadDevice>> sdl_gamepads;
};

std::map<SDL_JoystickID, std::shared_ptr<SDLGamepadDevice>> SDLGamepadDevice::sdl_gamepads;

class KbInputMapping : public InputMapping
{
public:
	KbInputMapping()
	{
		name = "SDL Keyboard";
		set_button(DC_BTN_A, SDLK_x);
		set_button(DC_BTN_B, SDLK_c);
		set_button(DC_BTN_X, SDLK_s);
		set_button(DC_BTN_Y, SDLK_d);
		set_button(DC_DPAD_UP, SDLK_UP);
		set_button(DC_DPAD_DOWN, SDLK_DOWN);
		set_button(DC_DPAD_LEFT, SDLK_LEFT);
		set_button(DC_DPAD_RIGHT, SDLK_RIGHT);
		set_button(DC_BTN_START, SDLK_RETURN);
		set_button(EMU_BTN_TRIGGER_LEFT, SDLK_f);
		set_button(EMU_BTN_TRIGGER_RIGHT, SDLK_v);
		set_button(EMU_BTN_MENU, SDLK_TAB);

		dirty = false;
	}
};

class SDLKbGamepadDevice : public GamepadDevice
{
public:
	SDLKbGamepadDevice(int maple_port) : GamepadDevice(maple_port, "SDL")
	{
		_name = "Keyboard";
		_unique_id = "sdl_keyboard";
		if (!find_mapping())
			input_mapper = new KbInputMapping();
	}
	virtual ~SDLKbGamepadDevice() {}
};

class MouseInputMapping : public InputMapping
{
public:
	MouseInputMapping()
	{
		name = "SDL Mouse";
		set_button(DC_BTN_A, SDL_BUTTON_LEFT);
		set_button(DC_BTN_B, SDL_BUTTON_RIGHT);
		set_button(DC_BTN_START, SDL_BUTTON_MIDDLE);

		dirty = false;
	}
};

class SDLMouseGamepadDevice : public GamepadDevice
{
public:
	SDLMouseGamepadDevice(int maple_port) : GamepadDevice(maple_port, "SDL")
	{
		_name = "Mouse";
		_unique_id = "sdl_mouse";
		if (!find_mapping())
			input_mapper = new MouseInputMapping();
	}
	virtual ~SDLMouseGamepadDevice() {}
	bool gamepad_btn_input(u32 code, bool pressed) override
	{
		if (gui_is_open())
			// Don't register mouse clicks as gamepad presses when gui is open
			// This makes the gamepad presses to be handled first and the mouse position to be ignored
			// TODO Make this generic
			return false;
		else
			return GamepadDevice::gamepad_btn_input(code, pressed);
	}
};