On Sun, Apr 22, 2001 at 05:27:35PM +0200, Benjamin Herrenschmidt wrote: > >Other point: performance. I am getting around 70 dropped frames out of > >each block of 200... Which makes DVD useable, but impossible to really > >_watch_ a movie. What are others getting? This is on a G4/400 TiBook. > >Has anybody made any atttempt at using Altivec to speed things up? > > I'm pretty sure most of the performance problem is not due to decoding > but to PCI throughput in Xv. This could probably be improved either by > using bust mastering within Xv (using DRI) but that would be quite > complicated, or by figuring out a way for Xv to map the YUV overlay
mmm, i have thought about doing something similar (on i386 and glint/permedia3, altough it should work also for the proformance boards on ppc hardware). Why do you say, it would be difficult to use the dma engine from the DRI stuff ? Friendly, Sven Luther
