[Libva] Poor performance in portrait mode using IEGD 10.3

[andreas.larsson at multiq.se]

Hi!

We've experienced poor performance when displaying video using mplayer 
with vaapi, when we have the display rotated to anything other that 0 
degrees.

We've talked with the premier support at Intel and they say simply that 
HW-accelleration is disabled in IEGD when the display is rotated.

It this the whole truth? From what we can see, video decoding still seems 
accellerated, but video display otoh seems to use SW.

Another thing we notice is that when the performance is bad the CPU still 
isn't maxed out, so where is the bottle neck?

Also, not only bad performance can be seen, but also increased tearing 
artefacts.

Any ideas what we can do to improve performance? In landscape mode the 
performance is really good. How can it be that a chip capable of OpenGL 
acceleration and other features can't rotate the screen in HW?

Kind regards, Andreas Larsson


----------------------------------------------------
Andreas Larsson
Software Design Manager



MultiQ Media Solutions
Industrigatan 14
SE 212 14 Malm, Sweden
Phone +46 (0)40 143503
Fax +46 (0)40 143502
Mobile +46 (0)736 601030
andreas.larsson at multiq.se
multiq.se