[MPlayer-dev-eng] mplayer libtremor patch

[Michael Niedermayer]

Hi

On Thu, Aug 10, 2006 at 10:14:22PM +0200, Balatoni Denes wrote:
> Hi!
> 
> csütörtök 10 augusztus 2006 12.13-kor Michael Niedermayer ezeket a bolcs 
> gondolatokat fogalmazta meg:
> >
> > or write a fixed-point imdct for ffmpeg
> 
> I have a theoretical question to this: would it be sufficient to brainlessly 
> convert the current fft/mdct to use 32 bit integers instead of floats (kind 
> of like it would be done to vorbis) ? Or the precission would suffer 
> unaccaptebly ?

depends, if you do multiplies like (a*(int64_t)b + bias)>>shift then 
precission should be fine
if you expect to do 32bit*32bit->32bit multiplies only then precission will
suffer, how much i dont know

[...]

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Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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