UI: Add adv. settings checkbox for browser HW accel

Adds a checkbox to advanced settings that allows the user to
enable/disable browser source hardware acceleration on windows.

UI/obs-app.cpp

@@ -437,6 +437,7 @@ bool OBSApp::InitGlobalConfigDefaults()
 #ifdef _WIN32
 	config_set_default_bool(globalConfig, "Audio", "DisableAudioDucking",
 			true);
+	config_set_default_bool(globalConfig, "General", "BrowserHWAccel", true);
 #endif
 
 #ifdef __APPLE__
@@ -1226,6 +1227,19 @@ bool OBSApp::OBSInit()
 		if (!StartupOBS(locale.c_str(), GetProfilerNameStore()))
 			return false;
 
+#ifdef _WIN32
+		bool browserHWAccel = config_get_bool(globalConfig, "General",
+				"BrowserHWAccel");
+
+		obs_data_t *settings = obs_data_create();
+		obs_data_set_bool(settings, "BrowserHWAccel", browserHWAccel);
+		obs_apply_private_data(settings);
+		obs_data_release(settings);
+
+		blog(LOG_INFO, "Browser Hardware Acceleration: %s",
+				browserHWAccel ? "true" : "false");
+#endif
+
 		blog(LOG_INFO, "Portable mode: %s",
 				portable_mode ? "true" : "false");