How to increase the priority of the thread corresponding to video decode in Android port for beagle?

Hi,
I am using Android port for beagle released by Embunux and I am
disabling the GStreamer there. As my video decode is suffering little
bit, I want to know "How to increase the priority of the thread
corresponding to video decode ?"
Help shall be greatly appreciated!!!

Thanks and Regards,
Sanjeev Kumar Verma