[FFmpeg-devel] 4xm idct computation

[Michael Niedermayer]

On Wed, Dec 28, 2011 at 05:07:43AM +0100, yann.lepetitcorps at free.fr wrote:
> Selon yann.lepetitcorps at free.fr:
> 
> > Hi,
> >
> > I have take a look into the libavcodec/4xm.c
> > => can the IDCT to be remplaced by something more simpler like Haar wavelets
> > ?
> > (for to can be accellerated by MMX instructions for example)
> >
> >
> > @+
> > Yannoo
> > _______________________________________________
> > ffmpeg-devel mailing list
> > ffmpeg-devel at ffmpeg.org
> > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> >
> 
> More precisely, I search an encoder/decoder that work like the DCT/iDCT but with
> the De Haar, Debauchies and/or others lifting schemes transforms instead the
> [Fast] Fourrier Transform

look at dirac, snow, indeo4/5 and jpeg2000 they use things in that
direction. most are not block based though

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Let us carefully observe those good qualities wherein our enemies excel us
and endeavor to excel them, by avoiding what is faulty, and imitating what
is excellent in them. -- Plutarch
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