Handling Pause Option in Source Filter

[uday]

Dear Team,

I implemented directshow source filter inheriting the class from
CSourceStream. I can Play, Stop the filter using GraphEdit tool by
overriding OnThreadStartPlay and OnThreadDestroy functions.

But how to distinguish between Play and Pause options.

What I noticed is that the breaks point at OnThreadStartPlay hits for
both Play and Pause options only if I select Stop option in between.
When Play, Pause are selected continuously, the control never comes to
OnThreadStartPlay.

Do I need to override any other related function.

Regards.