[vorbis-dev] mdct

Segher Boessenkool segher at eastsite.nl
Tue Aug 15 05:30:47 PDT 2000



> On Tue, 15 Aug 2000, Segher Boessenkool wrote:
> 
> > blocklength is 256/2048 for short/long?
> 
> It's not fixed in the format, just must be a power of two. :) 

Okay, but what are the sizes used _now_?
Need to know to unroll my loops :-)
My mdct thingy is a recursive function (actually, two mutually recursive
functions: a dct II and a dct IV).

>  
> > and the mdct window is some generic function, i.e. not always a sine window?
> 
> It's called the 'vorbis window' it's documented in the source.

The sin(sin) thing still? Weird function. But no sin window. OK.

Ciao,

Segher

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