[FFmpeg-devel] Optimizations for Cell Broadband Engine

John Kelley john
Tue May 8 10:26:13 CEST 2007

On 5/7/07, Loren Merritt <lorenm at u.washington.edu> wrote:
> On Mon, 7 May 2007, John Kelley wrote:
> >
> > We've been working on some general optimisations in #ps3dev on
> > irc.freenode.net, so far we have an optimised CSC algo that runs at
> > around 700fps at 720P using one SPU and also a bilinear scaler that
> > runs at around 70fps at 720P right now (needs some more optimisations)
> > and I've been working on an optimised 8x8 iDCT for the SPU but so far
> > have only had the spare time to implement the row operations but not
> > the cloumns.
> Are row transforms even useful on Cell? Both SSE2 and Altivec can run
> column/transpose/column faster than row/column.
Do you have any details on this, I'm rather new when it comes to iDCT
algos but this sounda promising.

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