tree 30a5e2aceaafc42e2a5e979ccee909aabc0b1505
parent 37ef61586adaa295902515d69fca0f30b0e7ecaa
author Hyunjun Ko <zzoon@igalia.com> 1520541510 -0900
committer Sreerenj Balachandran <sreerenj.balachandran@intel.com> 1520541510 -0900

msdk: manage child sessions on parent GstMsdkContext

Sometimes parent context is released before its children get released.
In this case MFXClose of parent session fails.

To make sure that child sessions are closed before closing a parent
session,
Parent context needs to manage child sessions and close them first when
it's released.

https://bugzilla.gnome.org/show_bug.cgi?id=793412