How do I write a qt application using gobject.MainLoop?
(The latest copy of this document can be found at [www.patrickkidd.com] ) GStreamer-0.10 uses asynchronous calls to control its pipelines, and these calls have async replies. You can get these replies by either polling the pipeline’s bus, or by running a gobject.MainLoop. Problems arise when you are writing a qt application that has its own main loop, and your application doesn’t necessarily have multi-threaded requirements (besides those already implemented by gstreamer). The following class will run the gobject.MainLoop whenever the QApplication is idle by using QTimer.start(0), and gobject.MainLoop.MainContext.pending/iteration. The exception in the constructor protects the singleton-nature of gobject.MainLoop for this application. Now you can just make your async calls from within the main qt thread. Fire away!
