[FFmpeg-devel] IDCT permutation (was: pre discussion around Blackfin dct_quantize_bfin routine)
Thu Jun 14 19:20:03 CEST 2007
2007/6/13, Siarhei Siamashka <siarhei.siamashka at gmail.com>:
> > > On Blackfin you want to elliminate those permutations they are costly.
> > > Basically, something like:
> > >
> > > j=scantable[i];
> > > x=data[j];
Actually you can combine both lookups. however in that case you'd have
to reorder the quantizer matrix accordingly.
However when I tried this approach in mpeg2 decoder the results
weren't amazing. (Athlon TBird).
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