H.264, hardware acceleration, and the free "radeon" driver

[me at beroal.in.ua]

Hello.

The free "radeon" driver provides only VDPAU API. I was told I can use 
the library
http://cgit.freedesktop.org/vaapi/vdpau-driver/
which provides VAAPI using VDPAU. But I can't get it to work. What is 
the best way to proceed?

0. Port GStreamer VDPAU H.264 plugin from GStreamer 0.10 to 1.0 
("gst-plugins-bad")?
1. Fiddle with "vaapi/vdpau-driver" until it works?
2. Beg the developers of the free "radeon" driver to add VAAPI?