[Bug 20505] radeon planar textured video

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=20505





--- Comment #9 from Alex Deucher <agd5f at yahoo.com>  2009-04-17 08:42:30 PST ---
(In reply to comment #8)
> Nice but I noticed two problems with my RV530:
> 1) the new attributes have effects only when BICUBIC is 0, but not when BICUBIC
> is 2 but disabled because the image is not scaled;

This is the intended behavior.  If bicubic is enabled or auto, I don't enable
the attributes since it would be confusing to have the effects suddenly
disappear when the video gets scaled.  The only way to use them is to disable
bicubic (XV_BICUBIC = 0).

> 2) with a small video (512x368) I noticed a 8% speedup (with mplayer -benchmark
> -quiet -nosound filename) no matter XV_SYNC, with a larger video (1280x720) I
> noticed a slowdown (over 61% and the video is jerkily), unless XV_SYNC is
> disabled, where I get the same performance. But maybe this is a collateral
> effect of the XV_SYNC that must paint all the frames and is noticeable only
> when doing benchmark (i.e. fps > video refresh)?
> 

XV_VSYNC is unrelated to these changes.  It will decrease performance in
benchmark type scenarios because it stalls the engine while it waits for the
current vline to pass beyond the video.  It's used to avoid tearing.  Turn it
off for benchmarking.


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