主循环切换首发音频、标记

main/application.cc

@@ -642,6 +642,7 @@ void Application::Schedule(std::function<void()> callback) {
 // The Main Loop controls the chat state and websocket connection
 // If other tasks need to access the websocket or chat state,
 // they should use Schedule to call this function
+//主循环切换首发音频
 void Application::MainLoop() {
     while (true) {
         auto bits = xEventGroupWaitBits(event_group_,