If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
I'm not very into this, but on my XP machine there is no ATI gpu-hardware acceleration of videofiles in any software (Xmbc, Vlc).
You need to use a player that uses DXVA to use UVD on Windows.
http://mpc-hc.sourceforge.net/ does, although I have found some H264 broadcast streams that don't work. I don't have a clue if it's the player, DXVA, the drivers or UVD on my card that's the problem. Most H264 seems to work - the ones that didn't were 1088x1920 so maybe that confused things.
As for OSS, UVD may be out of question, due to HDCP, but the devs have already said that there is enough info out for 3D engine GPU assisted decoding, just no one has written it yet.
In fact if there are UVD limitations to precise stream types, using the 3D engine may end up being a better and more flexible solution.
All of the documentation needed to accelerate video decode on AMD GPUs is available. Cooper is already working on accelerating video on r3xx-r5xx using gallium. r6xx+ will follow eventually. The devrel address is mostly oem/isv focused, so they don't really track the open source projects that closely.