Callback from gstreamer to application

[deepthips]

I have a gstreamer code (say playback.c) with basic functions such as load,
play, stop, seek etc.
I have a testapp which will link the playback.c library and call those
functions.
I need to post current position from playback.c to my testapp (to update the
progress bar). Like a callback function. How is it done in gstreamer. Saw
posting to gst bus and all. But my testapp should not be using gstreamer
directly. It is like an independent application.



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