[FFmpeg-soc] [soc]: r2688 - aacenc/aacenc.c

Michael Niedermayer michaelni at gmx.at
Sat Jul 5 23:17:37 CEST 2008


On Sat, Jul 05, 2008 at 06:17:12PM +0300, Kostya wrote:
> On Sat, Jul 05, 2008 at 12:58:16PM +0200, Michael Niedermayer wrote:
> > On Sat, Jul 05, 2008 at 01:15:20PM +0300, Kostya wrote:
> > > On Sat, Jul 05, 2008 at 12:11:55PM +0200, kostya wrote:
> > > > Author: kostya
> > > > Date: Sat Jul  5 12:11:55 2008
> > > > New Revision: 2688
> > > > 
> > > > Log:
> > > > Make MDCT output more realistic
> > > 
> > > I've tested against libfaac MDCT and seemed to produce
> > > quite different MDCT spectrum from the same input data.
> > > After I moved scaling by 512 lavc MDCT began to produce
> > > almost the same spectrum (without high-freq noise).
> > > 
> > > Can somebody tell me if there's a better way to do that
> > > and obtain the same result?
> > 
> > yes
> > 
> > 1. go find some cola
> 
> Can you send me a couple of thousand liters? Our custom offices definitely
> need a lot of that stuff too. Oh, and SBU must have your address as well.

sorry, i need the cola myself :)


> 
> > 2. think about the difference between short / 512 and float / 512
> > 3. the else case below is buggy in the same way
> 
> Fixed, thanks for pointing at that. Such kind of errors are the nastiest.

Btw, i think the case of switching dct sizes is wrong as well, it if iam not
mistaken needs different windows on the right and left side.

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

If you really think that XML is the answer, then you definitly missunderstood
the question -- Attila Kinali
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