Vorbis dev - Jan 2007 - Making Ogg Vorbis encoder use emulated FPU class

Hello!

I have written a class which emulates FPU on fixed point. I was told to test
its efficiency in some real application, by making it use my class instead
of hardware FPU. Somehow I thought about Ogg Vorbis encoder, because I was
told it uses FPU for encoding. I have some questions on this:
- does it make sense to do it with Ogg Vorbis encoder?
- is it possible to do it in reasonable time?
- if so, where is the code I would have to alter
- what problems can occur

I would really appreaciate any anwer to these questions, and any hint you
think might be useful for this.

Best regards

Tomek Wr?bel
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Hi!
> - does it make sense to do it with Ogg Vorbis encoder?
Sure.
> - is it possible to do it in reasonable time?
I don''t think so.
> - if so, where is the code I would have to alter
All over the place in the encoder. Or you mean where to get the encoder 
sources?
> - what problems can occur
You miss some places to alter in the source, etc.

> I would really appreaciate any anwer to these questions, and any hint you
> think might be useful for this.
>
> Best regards
>
> Tomek Wr?bel
bye
Denes

-- 
---
What kills me, doesn''t make me stronger.

Hi,

The standard decoder also use FPU. I didn''t look at the encoder, but I
suppose the decoder is simpler, so you could use it if you are short in
time.

If this class define function with the same name as the standard
operation on FPU (+,-,*,/). Meaby you could just change the type of the
used variables instead of changing the operation. This way you will have
less change to do. If this work, you could just a "cherche and
replace"
to replace "double" and "float" type to your class.

Hope this help

Fr?d?ric Bastien

Balatoni Denes wrote:
> Hi!
>
>   
>> - does it make sense to do it with Ogg Vorbis encoder?
>>     
> Sure.
>
>   
>> - is it possible to do it in reasonable time?
>>     
> I don''t think so.
>
>   
>> - if so, where is the code I would have to alter
>>     
> All over the place in the encoder. Or you mean where to get the encoder 
> sources?
>
>   
>> - what problems can occur
>>     
> You miss some places to alter in the source, etc.
>
>
>   
>> I would really appreaciate any anwer to these questions, and any hint
you
>> think might be useful for this.
>>
>> Best regards
>>
>> Tomek Wr?bel
>>     
>
> bye
> Denes
>
>