[vorbis-dev] MDCT_INTEGERIZED

[Rado Buransky]

Hello,

> On Fri, 2004-04-09 at 08:50, Rado Buransky wrote:
> > Hello,
> >
> > I have used "MDCT_INTEGERIZED" version of mdct and the resulting
bitstream
> > is absolutely silent. Do I have to make some other changes to the source
> > code to get it working? I mean some int->float or float->int conversion
> > before/after call a mdct function.
>
> When I try it, I actually get white noise. It appears that the
> MDCT_INTEGERIZED code path is not fully developed, considering the
> warning on the line in mdct.h that you have to un-comment to enable this
> code path.
>
> Also, when compiling with MDCT_INTEGERIZED enabled, I get compiler
> warnings in mapping0.c where mdct_forward and mdct_backward are being
> called. Arguments 2 and 3 in these functions are float vectors, but on
> the MDCT_INTEGERIZED code path, the functions expect them to be int
> vectors, and no conversion is being done.
>
> So, if you insist on using the standard code with just the integerized
> MDCT, it appears that you need some kind of float/int conversions going
> into the mdct functions, and some kind of int/float conversions coming
> out of them. I am wondering, though, can't you just use Tremor, the
> fully integerized decoder?

I need an encoder not decoder. That's why I can't use it.

>
> -Carsten
>
>
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