Cppcheck report - Godot - branch: 3.x, commit: cd92ad0f69a842d94dc2d56f83cbd8f724ed2959 (2024-12-15): platform/windows/joypad_windows.cpp

/**************************************************************************/
/*  joypad_windows.cpp                                                    */
/**************************************************************************/
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#include "joypad_windows.h"

#include <oleauto.h>
#include <wbemidl.h>

#if defined(__GNUC__)
// Workaround GCC warning from -Wcast-function-type.
#define GetProcAddress (void *)GetProcAddress
#endif

DWORD WINAPI _xinput_get_state(DWORD dwUserIndex, XINPUT_STATE *pState) {
	return ERROR_DEVICE_NOT_CONNECTED;
}
DWORD WINAPI _xinput_set_state(DWORD dwUserIndex, XINPUT_VIBRATION *pVibration) {
	return ERROR_DEVICE_NOT_CONNECTED;
}

JoypadWindows::JoypadWindows() {
}

JoypadWindows::JoypadWindows(InputDefault *_input, HWND *hwnd) {
	input = _input;
	hWnd = hwnd;
	joypad_count = 0;
	dinput = NULL;
<--- Variable 'dinput' is assigned in constructor body. Consider performing initialization in initialization list. [+]
When an object of a class is created, the constructors of all member variables are called consecutively in the order the variables are declared, even if you don't explicitly write them to the initialization list. You could avoid assigning 'dinput' a value by passing the value to the constructor in the initialization list.
	xinput_dll = NULL;
<--- Variable 'xinput_dll' is assigned in constructor body. Consider performing initialization in initialization list. [+]
When an object of a class is created, the constructors of all member variables are called consecutively in the order the variables are declared, even if you don't explicitly write them to the initialization list. You could avoid assigning 'xinput_dll' a value by passing the value to the constructor in the initialization list.
	xinput_get_state = NULL;
	xinput_set_state = NULL;

	load_xinput();

	for (int i = 0; i < JOYPADS_MAX; i++)
		attached_joypads[i] = false;

	HRESULT result = DirectInput8Create(GetModuleHandle(nullptr), DIRECTINPUT_VERSION, IID_IDirectInput8, (void **)&dinput, nullptr);
	if (result == DI_OK) {
		probe_joypads();
	} else {
		ERR_PRINT("Couldn't initialize DirectInput. Error: " + itos(result));
		if (result == DIERR_OUTOFMEMORY) {
			ERR_PRINT("The Windows DirectInput subsystem could not allocate sufficient memory.");
			ERR_PRINT("Rebooting your PC may solve this issue.");
		}
		// Ensure dinput is still a nullptr.
		dinput = nullptr;
	}
}

JoypadWindows::~JoypadWindows() {
	close_joypad();
	if (dinput) {
		dinput->Release();
	}
	unload_xinput();
}

bool JoypadWindows::have_device(const GUID &p_guid) {
	for (int i = 0; i < JOYPADS_MAX; i++) {
		if (d_joypads[i].guid == p_guid) {
			d_joypads[i].confirmed = true;
			return true;
		}
	}
	return false;
}

// adapted from SDL2, works a lot better than the MSDN version
bool JoypadWindows::is_xinput_device(const GUID *p_guid) {
	static GUID IID_ValveStreamingGamepad = { MAKELONG(0x28DE, 0x11FF), 0x28DE, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_X360WiredGamepad = { MAKELONG(0x045E, 0x02A1), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_X360WirelessGamepad = { MAKELONG(0x045E, 0x028E), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_XSWirelessGamepad = { MAKELONG(0x045E, 0x0B13), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_XEliteWirelessGamepad = { MAKELONG(0x045E, 0x0B05), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_XOneWiredGamepad = { MAKELONG(0x045E, 0x02FF), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_XOneWirelessGamepad = { MAKELONG(0x045E, 0x02DD), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_XOneNewWirelessGamepad = { MAKELONG(0x045E, 0x02D1), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_XOneSWirelessGamepad = { MAKELONG(0x045E, 0x02EA), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_XOneSBluetoothGamepad = { MAKELONG(0x045E, 0x02E0), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_XOneEliteWirelessGamepad = { MAKELONG(0x045E, 0x02E3), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };
	static GUID IID_XOneElite2WirelessGamepad = { MAKELONG(0x045E, 0x0B22), 0x0000, 0x0000, { 0x00, 0x00, 0x50, 0x49, 0x44, 0x56, 0x49, 0x44 } };

	if (memcmp(p_guid, &IID_ValveStreamingGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_X360WiredGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_X360WirelessGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_XSWirelessGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_XEliteWirelessGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_XOneWiredGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_XOneWirelessGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_XOneNewWirelessGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_XOneSWirelessGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_XOneSBluetoothGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_XOneEliteWirelessGamepad, sizeof(*p_guid)) == 0 ||
			memcmp(p_guid, &IID_XOneElite2WirelessGamepad, sizeof(*p_guid)) == 0)
		return true;

	PRAWINPUTDEVICELIST dev_list = NULL;
	unsigned int dev_list_count = 0;

	if (GetRawInputDeviceList(NULL, &dev_list_count, sizeof(RAWINPUTDEVICELIST)) == (UINT)-1) {
		return false;
	}
	dev_list = (PRAWINPUTDEVICELIST)memalloc(sizeof(RAWINPUTDEVICELIST) * dev_list_count);
	ERR_FAIL_NULL_V_MSG(dev_list, false, "Out of memory.");

	if (GetRawInputDeviceList(dev_list, &dev_list_count, sizeof(RAWINPUTDEVICELIST)) == (UINT)-1) {
		memfree(dev_list);
		return false;
	}
	for (unsigned int i = 0; i < dev_list_count; i++) {
		RID_DEVICE_INFO rdi;
		char dev_name[128];
		UINT rdiSize = sizeof(rdi);
		UINT nameSize = sizeof(dev_name);

		rdi.cbSize = rdiSize;
		if ((dev_list[i].dwType == RIM_TYPEHID) &&
				(GetRawInputDeviceInfoA(dev_list[i].hDevice, RIDI_DEVICEINFO, &rdi, &rdiSize) != (UINT)-1) &&
				(MAKELONG(rdi.hid.dwVendorId, rdi.hid.dwProductId) == (LONG)p_guid->Data1) &&
				(GetRawInputDeviceInfoA(dev_list[i].hDevice, RIDI_DEVICENAME, &dev_name, &nameSize) != (UINT)-1) &&
				(strstr(dev_name, "IG_") != NULL)) {
			memfree(dev_list);
			return true;
		}
	}
	memfree(dev_list);
	return false;
}

bool JoypadWindows::setup_dinput_joypad(const DIDEVICEINSTANCE *instance) {
	ERR_FAIL_NULL_V_MSG(dinput, false, "DirectInput not initialized. Rebooting your PC may solve this issue.");
	HRESULT hr;
	int num = input->get_unused_joy_id();

	if (have_device(instance->guidInstance) || num == -1)
		return false;

	d_joypads[num] = dinput_gamepad();
	dinput_gamepad *joy = &d_joypads[num];

	const DWORD devtype = (instance->dwDevType & 0xFF);

	if ((devtype != DI8DEVTYPE_JOYSTICK) && (devtype != DI8DEVTYPE_GAMEPAD) && (devtype != DI8DEVTYPE_1STPERSON) && (devtype != DI8DEVTYPE_DRIVING)) {
		return false;
	}

	hr = dinput->CreateDevice(instance->guidInstance, &joy->di_joy, NULL);

	if (FAILED(hr)) {
		return false;
	}

	const GUID &guid = instance->guidProduct;
	char uid[128];

	ERR_FAIL_COND_V_MSG(memcmp(&guid.Data4[2], "PIDVID", 6), false, "DirectInput device not recognised.");
	WORD type = BSWAP16(0x03);
	WORD vendor = BSWAP16(LOWORD(guid.Data1));
	WORD product = BSWAP16(HIWORD(guid.Data1));
	WORD version = 0;
	sprintf_s(uid, "%04x%04x%04x%04x%04x%04x%04x%04x", type, 0, vendor, 0, product, 0, version, 0);

	id_to_change = num;
	slider_count = 0;

	joy->di_joy->SetDataFormat(&c_dfDIJoystick2);
	joy->di_joy->SetCooperativeLevel(*hWnd, DISCL_FOREGROUND);
	joy->di_joy->EnumObjects(objectsCallback, this, 0);
	joy->joy_axis.sort();

	joy->guid = instance->guidInstance;
	input->joy_connection_changed(num, true, instance->tszProductName, uid);
	joy->attached = true;
	joy->id = num;
	attached_joypads[num] = true;
	joy->confirmed = true;
	joypad_count++;
	return true;
}

void JoypadWindows::setup_joypad_object(const DIDEVICEOBJECTINSTANCE *ob, int p_joy_id) {
	if (ob->dwType & DIDFT_AXIS) {
		HRESULT res;
		DIPROPRANGE prop_range;
		DIPROPDWORD dilong;
		LONG ofs;
		if (ob->guidType == GUID_XAxis)
			ofs = DIJOFS_X;
		else if (ob->guidType == GUID_YAxis)
			ofs = DIJOFS_Y;
		else if (ob->guidType == GUID_ZAxis)
			ofs = DIJOFS_Z;
		else if (ob->guidType == GUID_RxAxis)
			ofs = DIJOFS_RX;
		else if (ob->guidType == GUID_RyAxis)
			ofs = DIJOFS_RY;
		else if (ob->guidType == GUID_RzAxis)
			ofs = DIJOFS_RZ;
		else if (ob->guidType == GUID_Slider) {
			if (slider_count < 2) {
				ofs = DIJOFS_SLIDER(slider_count);
				slider_count++;
			} else {
				return;
			}
		} else
			return;
		prop_range.diph.dwSize = sizeof(DIPROPRANGE);
		prop_range.diph.dwHeaderSize = sizeof(DIPROPHEADER);
		prop_range.diph.dwObj = ob->dwType;
		prop_range.diph.dwHow = DIPH_BYID;
		prop_range.lMin = -MAX_JOY_AXIS;
		prop_range.lMax = +MAX_JOY_AXIS;

		dinput_gamepad &joy = d_joypads[p_joy_id];

		res = IDirectInputDevice8_SetProperty(joy.di_joy, DIPROP_RANGE, &prop_range.diph);
		if (FAILED(res))
			return;

		dilong.diph.dwSize = sizeof(dilong);
		dilong.diph.dwHeaderSize = sizeof(dilong.diph);
		dilong.diph.dwObj = ob->dwType;
		dilong.diph.dwHow = DIPH_BYID;
		dilong.dwData = 0;

		res = IDirectInputDevice8_SetProperty(joy.di_joy, DIPROP_DEADZONE, &dilong.diph);
		if (FAILED(res))
			return;

		joy.joy_axis.push_back(ofs);
	}
}

BOOL CALLBACK JoypadWindows::enumCallback(const DIDEVICEINSTANCE *p_instance, void *p_context) {
	JoypadWindows *self = (JoypadWindows *)p_context;
<--- C-style pointer casting [+]
C-style pointer casting detected. C++ offers four different kinds of casts as replacements: static_cast, const_cast, dynamic_cast and reinterpret_cast. A C-style cast could evaluate to any of those automatically, thus it is considered safer if the programmer explicitly states which kind of cast is expected. See also: https://www.securecoding.cert.org/confluence/display/cplusplus/EXP05-CPP.+Do+not+use+C-style+casts.
	if (self->is_xinput_device(&p_instance->guidProduct)) {
		return DIENUM_CONTINUE;
	}
	self->setup_dinput_joypad(p_instance);
	return DIENUM_CONTINUE;
}

BOOL CALLBACK JoypadWindows::objectsCallback(const DIDEVICEOBJECTINSTANCE *instance, void *context) {
	JoypadWindows *self = (JoypadWindows *)context;
<--- C-style pointer casting [+]
C-style pointer casting detected. C++ offers four different kinds of casts as replacements: static_cast, const_cast, dynamic_cast and reinterpret_cast. A C-style cast could evaluate to any of those automatically, thus it is considered safer if the programmer explicitly states which kind of cast is expected. See also: https://www.securecoding.cert.org/confluence/display/cplusplus/EXP05-CPP.+Do+not+use+C-style+casts.
	self->setup_joypad_object(instance, self->id_to_change);

	return DIENUM_CONTINUE;
}

void JoypadWindows::close_joypad(int id) {
	if (id == -1) {
		for (int i = 0; i < JOYPADS_MAX; i++) {
			close_joypad(i);
		}
		return;
	}

	if (!d_joypads[id].attached)
		return;

	d_joypads[id].di_joy->Unacquire();
	d_joypads[id].di_joy->Release();
	d_joypads[id].attached = false;
	attached_joypads[d_joypads[id].id] = false;
	d_joypads[id].guid.Data1 = d_joypads[id].guid.Data2 = d_joypads[id].guid.Data3 = 0;
	input->joy_connection_changed(d_joypads[id].id, false, "");
	joypad_count--;
}

void JoypadWindows::probe_joypads() {
	ERR_FAIL_NULL_MSG(dinput, "DirectInput not initialized. Rebooting your PC may solve this issue.");
	DWORD dwResult;
	for (DWORD i = 0; i < XUSER_MAX_COUNT; i++) {
		ZeroMemory(&x_joypads[i].state, sizeof(XINPUT_STATE));

		dwResult = xinput_get_state(i, &x_joypads[i].state);
		if (dwResult == ERROR_SUCCESS) {
			int id = input->get_unused_joy_id();
			if (id != -1 && !x_joypads[i].attached) {
				x_joypads[i].attached = true;
				x_joypads[i].id = id;
				x_joypads[i].ff_timestamp = 0;
				x_joypads[i].ff_end_timestamp = 0;
				x_joypads[i].vibrating = false;
				attached_joypads[id] = true;
				input->joy_connection_changed(id, true, "XInput Gamepad", "__XINPUT_DEVICE__");
			}
		} else if (x_joypads[i].attached) {
			x_joypads[i].attached = false;
			attached_joypads[x_joypads[i].id] = false;
			input->joy_connection_changed(x_joypads[i].id, false, "");
		}
	}

	for (int i = 0; i < joypad_count; i++) {
		d_joypads[i].confirmed = false;
	}

	dinput->EnumDevices(DI8DEVCLASS_GAMECTRL, enumCallback, this, DIEDFL_ATTACHEDONLY);

	for (int i = 0; i < joypad_count; i++) {
		if (!d_joypads[i].confirmed) {
			close_joypad(i);
		}
	}
}

void JoypadWindows::process_joypads() {
	HRESULT hr;

	for (int i = 0; i < XUSER_MAX_COUNT; i++) {
		xinput_gamepad &joy = x_joypads[i];
		if (!joy.attached) {
			continue;
		}
		ZeroMemory(&joy.state, sizeof(XINPUT_STATE));

		xinput_get_state(i, &joy.state);
		if (joy.state.dwPacketNumber != joy.last_packet) {
			int button_mask = XINPUT_GAMEPAD_DPAD_UP;
			for (int j = 0; j <= 16; j++) {
				input->joy_button(joy.id, j, joy.state.Gamepad.wButtons & button_mask);
				button_mask = button_mask * 2;
			}

			input->joy_axis(joy.id, JOY_AXIS_0, axis_correct(joy.state.Gamepad.sThumbLX, true));
			input->joy_axis(joy.id, JOY_AXIS_1, axis_correct(joy.state.Gamepad.sThumbLY, true, false, true));
			input->joy_axis(joy.id, JOY_AXIS_2, axis_correct(joy.state.Gamepad.sThumbRX, true));
			input->joy_axis(joy.id, JOY_AXIS_3, axis_correct(joy.state.Gamepad.sThumbRY, true, false, true));
			input->joy_axis(joy.id, JOY_AXIS_4, axis_correct(joy.state.Gamepad.bLeftTrigger, true, true));
			input->joy_axis(joy.id, JOY_AXIS_5, axis_correct(joy.state.Gamepad.bRightTrigger, true, true));
			joy.last_packet = joy.state.dwPacketNumber;
		}
		uint64_t timestamp = input->get_joy_vibration_timestamp(joy.id);
		if (timestamp > joy.ff_timestamp) {
			Vector2 strength = input->get_joy_vibration_strength(joy.id);
			float duration = input->get_joy_vibration_duration(joy.id);
			if (strength.x == 0 && strength.y == 0) {
				joypad_vibration_stop_xinput(i, timestamp);
			} else {
				joypad_vibration_start_xinput(i, strength.x, strength.y, duration, timestamp);
			}
		} else if (joy.vibrating && joy.ff_end_timestamp != 0) {
			uint64_t current_time = OS::get_singleton()->get_ticks_usec();
			if (current_time >= joy.ff_end_timestamp)
				joypad_vibration_stop_xinput(i, current_time);
		}
	}

	for (int i = 0; i < JOYPADS_MAX; i++) {
		dinput_gamepad *joy = &d_joypads[i];

		if (!joy->attached)
			continue;

		DIJOYSTATE2 js;
		hr = joy->di_joy->Poll();
		if (hr == DIERR_INPUTLOST || hr == DIERR_NOTACQUIRED) {
			IDirectInputDevice8_Acquire(joy->di_joy);
			joy->di_joy->Poll();
		}

		hr = joy->di_joy->GetDeviceState(sizeof(DIJOYSTATE2), &js);
		if (FAILED(hr)) {
			continue;
		}

		post_hat(joy->id, js.rgdwPOV[0]);

		for (int j = 0; j < 128; j++) {
			if (js.rgbButtons[j] & 0x80) {
				if (!joy->last_buttons[j]) {
					input->joy_button(joy->id, j, true);
					joy->last_buttons[j] = true;
				}
			} else {
				if (joy->last_buttons[j]) {
					input->joy_button(joy->id, j, false);
					joy->last_buttons[j] = false;
				}
			}
		}

		// on mingw, these constants are not constants
		int count = 8;
		LONG axes[] = { DIJOFS_X, DIJOFS_Y, DIJOFS_Z, DIJOFS_RX, DIJOFS_RY, DIJOFS_RZ, (LONG)DIJOFS_SLIDER(0), (LONG)DIJOFS_SLIDER(1) };<--- Variable 'axes' can be declared with const
		int values[] = { js.lX, js.lY, js.lZ, js.lRx, js.lRy, js.lRz, js.rglSlider[0], js.rglSlider[1] };

		for (int j = 0; j < joy->joy_axis.size(); j++) {
			for (int k = 0; k < count; k++) {
				if (joy->joy_axis[j] == axes[k]) {
					input->joy_axis(joy->id, j, axis_correct(values[k]));
					break;
				};
			};
		};
	}
	return;
}

void JoypadWindows::post_hat(int p_device, DWORD p_dpad) {
	int dpad_val = 0;

	// Should be -1 when centered, but according to docs:
	// "Some drivers report the centered position of the POV indicator as 65,535. Determine whether the indicator is centered as follows:
	//  BOOL POVCentered = (LOWORD(dwPOV) == 0xFFFF);"
	// https://docs.microsoft.com/en-us/previous-versions/windows/desktop/ee416628(v%3Dvs.85)#remarks
	if (LOWORD(p_dpad) == 0xFFFF) {
		dpad_val = InputDefault::HAT_MASK_CENTER;
	}
	if (p_dpad == 0) {
		dpad_val = InputDefault::HAT_MASK_UP;

	} else if (p_dpad == 4500) {
		dpad_val = (InputDefault::HAT_MASK_UP | InputDefault::HAT_MASK_RIGHT);

	} else if (p_dpad == 9000) {
		dpad_val = InputDefault::HAT_MASK_RIGHT;

	} else if (p_dpad == 13500) {
		dpad_val = (InputDefault::HAT_MASK_RIGHT | InputDefault::HAT_MASK_DOWN);

	} else if (p_dpad == 18000) {
		dpad_val = InputDefault::HAT_MASK_DOWN;

	} else if (p_dpad == 22500) {
		dpad_val = (InputDefault::HAT_MASK_DOWN | InputDefault::HAT_MASK_LEFT);

	} else if (p_dpad == 27000) {
		dpad_val = InputDefault::HAT_MASK_LEFT;

	} else if (p_dpad == 31500) {
		dpad_val = (InputDefault::HAT_MASK_LEFT | InputDefault::HAT_MASK_UP);
	}
	input->joy_hat(p_device, dpad_val);
};

float JoypadWindows::axis_correct(int p_val, bool p_xinput, bool p_trigger, bool p_negate) const {
	if (Math::abs(p_val) < MIN_JOY_AXIS) {
		return p_trigger ? -1.0f : 0.0f;
	}
	if (!p_xinput) {
		return (float)p_val / MAX_JOY_AXIS;
	}
	if (p_trigger) {
		// Convert to a value between -1.0f and 1.0f.
		return 2.0f * p_val / MAX_TRIGGER - 1.0f;
	}
	float value;
	if (p_val < 0) {
		value = (float)p_val / MAX_JOY_AXIS;
	} else {
		value = (float)p_val / (MAX_JOY_AXIS - 1);
	}
	if (p_negate) {
		value = -value;
	}
	return value;
}

void JoypadWindows::joypad_vibration_start_xinput(int p_device, float p_weak_magnitude, float p_strong_magnitude, float p_duration, uint64_t p_timestamp) {
	xinput_gamepad &joy = x_joypads[p_device];
	if (joy.attached) {
		XINPUT_VIBRATION effect;
		effect.wLeftMotorSpeed = (65535 * p_strong_magnitude);
		effect.wRightMotorSpeed = (65535 * p_weak_magnitude);
		if (xinput_set_state(p_device, &effect) == ERROR_SUCCESS) {
			joy.ff_timestamp = p_timestamp;
			joy.ff_end_timestamp = p_duration == 0 ? 0 : p_timestamp + (uint64_t)(p_duration * 1000000.0);
			joy.vibrating = true;
		}
	}
}

void JoypadWindows::joypad_vibration_stop_xinput(int p_device, uint64_t p_timestamp) {
	xinput_gamepad &joy = x_joypads[p_device];
	if (joy.attached) {
		XINPUT_VIBRATION effect;
		effect.wLeftMotorSpeed = 0;
		effect.wRightMotorSpeed = 0;
		if (xinput_set_state(p_device, &effect) == ERROR_SUCCESS) {
			joy.ff_timestamp = p_timestamp;
			joy.vibrating = false;
		}
	}
}

void JoypadWindows::load_xinput() {
	xinput_get_state = &_xinput_get_state;
	xinput_set_state = &_xinput_set_state;
	xinput_dll = LoadLibrary("XInput1_4.dll");
	if (!xinput_dll) {
		xinput_dll = LoadLibrary("XInput1_3.dll");
		if (!xinput_dll) {
			xinput_dll = LoadLibrary("XInput9_1_0.dll");
		}
	}

	if (!xinput_dll) {
		print_verbose("Could not find XInput, using DirectInput only");
		return;
	}

	XInputGetState_t func = (XInputGetState_t)GetProcAddress((HMODULE)xinput_dll, "XInputGetState");
	XInputSetState_t set_func = (XInputSetState_t)GetProcAddress((HMODULE)xinput_dll, "XInputSetState");
	if (!func || !set_func) {
		unload_xinput();
		return;
	}
	xinput_get_state = func;
	xinput_set_state = set_func;
}

void JoypadWindows::unload_xinput() {
	if (xinput_dll) {
		FreeLibrary((HMODULE)xinput_dll);
	}
}