App-Input/win_keyboard.cpp at master · labstreaminglayer/App-Input · GitHub

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#include <iostream>
#include <lsl_cpp.h>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

// names for the Windows virtual-key codes
const std::string key_names[256] = {"RESERVED00", "LBUTTON", "RBUTTON", "CANCEL", "MBUTTON",
	"XBUTTON1", "XBUTTON2", "BELL", "BACK", "TAB", "RESERVED0A", "RESERVED0B", "CLEAR", "RETURN",
	"RESERVED0E", "RESERVED0F", "SHIFT", "CONTROL", "MENU", "PAUSE", "CAPITAL", "KANA",
	"RESERVED16", "JUNJA", "FINAL", "KANJI", "UNASSIGNED1A", "ESCAPE", "CONVERT", "NONCONVERT",
	"ACCEPT", "MODECHANGE", "SPACE", "PRIOR", "NEXT", "END", "HOME", "LEFT", "UP", "RIGHT", "DOWN",
	"SELECT", "PRINT", "EXECUTE", "SNAPSHOT", "INSERT", "DELETE", "HELP", "0", "1", "2", "3", "4",
	"5", "6", "7", "8", "9", "UNASSIGNED3A", "UNASSIGNED3B", "UNASSIGNED3C", "UNASSIGNED3D",
	"UNASSIGNED3E", "UNASSIGNED3F", "UNASSIGNED40", "A", "B", "C", "D", "E", "F", "G", "H", "I",
	"J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "LWIN",
	"RWIN", "APPS", "RESERVED5E", "SLEEP", "NUMPAD0", "NUMPAD1", "NUMPAD2", "NUMPAD3", "NUMPAD4",
	"NUMPAD5", "NUMPAD6", "NUMPAD7", "NUMPAD8", "NUMPAD9", "MULTIPLY", "ADD", "SEPARATOR",
	"SUBTRACT", "DECIMAL", "DIVIDE", "F1", "F2", "F3", "F4", "F5", "F6", "F7", "F8", "F9", "F10",
	"F11", "F12", "F13", "F14", "F15", "F16", "F17", "F18", "F19", "F20", "F21", "F22", "F23",
	"F24", "UNASSIGNED88", "UNASSIGNED89", "UNASSIGNED8A", "UNASSIGNED8B", "UNASSIGNED8C",
	"UNASSIGNED8D", "UNASSIGNED8E", "UNASSIGNED8F", "NUMLOCK", "SCROLL", "OEM_FJ_JISHO",
	"OEM_FJ_MASSHOU", "OEM_FJ_TOUROKU", "OEM_FJ_LOYA", "OEM_FJ_ROYA", "UNASSIGNED97",
	"UNASSIGNED98", "UNASSIGNED99", "UNASSIGNED9A", "UNASSIGNED9B", "UNASSIGNED9C", "UNASSIGNED9D",
	"UNASSIGNED9E", "UNASSIGNED9F", "LSHIFT", "RSHIFT", "LCONTROL", "RCONTROL", "LMENU", "RMENU",
	"BROWSER_BACK", "BROWSER_FORWARD", "BROWSER_REFRESH", "BROWSER_STOP", "BROWSER_SEARCH",
	"BROWSER_FAVORITES", "BROWSER_HOME", "VOLUME_MUTE", "VOLUME_DOWN", "VOLUME_UP",
	"MEDIA_NEXT_TRACK", "MEDIA_PREV_TRACK", "MEDIA_STOP", "MEDIA_PLAY_PAUSE", "LAUNCH_MAIL",
	"LAUNCH_MEDIA_SELECT", "LAUNCH_APP1", "LAUNCH_APP2", "RESERVEDB8", "RESERVEDB9", "US_SEMICOLON",
	"PLUS", "COMMA", "MINUS", "PERIOD", "US_SLASH", "US_TILDE", "RESERVEDC1", "RESERVEDC2",
	"RESERVEDC3", "RESERVEDC4", "RESERVEDC5", "RESERVEDC6", "RESERVEDC7", "RESERVEDC8",
	"RESERVEDC9", "RESERVEDCA", "RESERVEDCB", "RESERVEDCC", "RESERVEDCD", "RESERVEDCE",
	"RESERVEDCF", "RESERVEDD0", "RESERVEDD1", "RESERVEDD2", "RESERVEDD3", "RESERVEDD4",
	"RESERVEDD5", "RESERVEDD6", "RESERVEDD7", "UNASSIGNEDD8", "UNASSIGNEDD9", "UNASSIGNEDDA",
	"US_SQUARE_BRACKET_OPEN", "US_BACKSLASH", "US_SQUARE_BRACKET_CLOSE", "US_QUOTE", "OEM_8",
	"RESERVEDE0", "OEM_AX", "OEM_102", "ICO_HELP", "ICO_00", "PROCESSKEY", "ICO_CLEAR", "PACKET",
	"RESERVEDE8", "OEM_RESET", "OEM_JUMP", "OEM_PA1", "OEM_PA2", "OEM_PA3", "OEM_WSCTRL",
	"OEM_CUSEL", "OEM_ATTN", "OEM_FINISH", "OEM_COPY", "OEM_AUTO", "OEM_ENLW", "OEM_BACKTAB",
	"ATTN", "CRSEL", "EXSEL", "EREOF", "PLAY", "ZOOM", "NONAME", "PA1", "OEM_CLEAR", "RESERVEDFF"};

static lsl::stream_outlet* outlet = nullptr;
static HHOOK kbdHook = nullptr;
static bool isPressed[256] = {0};

LRESULT CALLBACK keyboard_callback(int code, WPARAM wParam, LPARAM lParam) {
	if (code >= 0 && outlet) {
		unsigned char key = 0;
		switch (wParam) {
		case WM_KEYDOWN:
		case WM_SYSKEYDOWN:
			key = ((KBDLLHOOKSTRUCT *)lParam)->vkCode & 0xFF;
			if (!isPressed[key]) {
				std::string evstr{key_names[key] + " pressed"};
				outlet->push_sample(&evstr);
				std::cout << evstr << std::endl;
				isPressed[key] = true;
			}
			break;
		case WM_KEYUP:
		case WM_SYSKEYUP:
			key = ((KBDLLHOOKSTRUCT *)lParam)->vkCode & 0xFF;
			{
				std::string evstr{key_names[key] + " released"};
				outlet->push_sample(&evstr);
			}
			isPressed[key] = false;
			break;
		default:;
		}
	}
	return CallNextHookEx(kbdHook, code, wParam, lParam);
}

int main(int argc, char *argv[]) {
	try {
		kbdHook =
			SetWindowsHookEx(WH_KEYBOARD_LL, (HOOKPROC)keyboard_callback, GetModuleHandle(nullptr), 0);
		if (!kbdHook)
			throw std::runtime_error(
				"Cannot install keyboard hook. Please make sure that this program has the "
				"permission to grab the Windows keyboard events.");
		std::cout << "Keyboard successfully hooked" << std::endl;
		// create streaminfo and outlet
		lsl::stream_info info("Keyboard", "Markers", 1, lsl::IRREGULAR_RATE, lsl::cf_string);
		outlet = new lsl::stream_outlet(info);
		std::cout << "Outlet created. Close this window to stop streaming." << std::endl;
	} catch (std::exception &e) { std::cerr << "Error: " << e.what() << std::endl; }
	MSG msg;
	while (GetMessage(&msg, NULL, 0, 0) > 0) {
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	if (kbdHook > 0) UnhookWindowsHookEx(kbdHook);
	if (outlet) delete outlet;
}