directsoundsrc plugin. no change_state function pipleline hangs when changing state

[tanmay.ambre]

I am using directsoundsrc plugin to capture audio on windows.

The plugin works fine except when I want to close it gracefully. 

//******
I send an EOS event to the pipeline

/gst_element_send_event(pipeline_sound_capture,gst_event_new_eos());/

capture the EOS message and close the main loop

/g_main_loop_quit (mainLoop);/

and the quit gracefully
/		g_main_loop_run (mainLoop);
		/* Out of the main loop, clean up nicely */
		gst_element_set_state (pipeline_sound_capture, GST_STATE_NULL); ///Stuck
here
		gst_object_unref (GST_OBJECT (pipeline_sound_capture));
		g_mutex_unlock(loopMutex);/

The execution is stuck when I am changing the state to NULL.

I noticed that there is no change_state function assigned in the
gstdirectsoundsrc.c

Could this be causing a problem?

I am guessing that the purpose of the function is to facilitate the change
of state of the plugin.

Another thing I tried was changing the state of the soundcapture element to
NULL. and the execution hangs there as well.

/gst_element_set_state(source,GST_STATE_NULL);/

The same pattern works well for video. using ksvideosrc plugin

Any help appreciated. I will try to add the code for change_state  in
gstdirectsoundsrc.c and see if it works.

I am using OSSBuild 

Cheers 

Tanmay Ambre

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