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Subject: Re: dsp.c help needed

Re: dsp.c help needed

From: Ronald Teune <rtwolf_at_gmx.net>
Date: 2005-07-07

Now you got me even more puzzled about your weird non-codec/non-plugin
thingy.
What is it that you want to code? (not that I'm curious...)
Have no answer to your question btw, sorry.

Ronald

On Thu, 07 Jul 2005 15:16:55 +0200, lear@algonet.se <lear@algonet.se>
wrote:

> Hi,
>
> I want to add a processing step in dsp.c, but I must say I find it
> difficult to
> fully understand how it works. A few questions and things I've noticed:
>
> * Which format are the samples in during processing? I want to multiply
> them
> with a fixed-point number - before clipping - so I need to know the exact
> format.
>
> * Which input sample depths are supported? The code implies 16 and 32
> only,
> but it isn't clear from the API.
>
> * Samples seem to be scaled differently, depending on the stereo format
> (if
> scaling is needed).
>
> * When "rendering" the final samples, the scaling and clipping seems to
> do
> things that aren't needed (unless GCC is smart enough to optimize away
> that).
>
> Perhaps a cleanup would be in order? :)
>
> Magnus
>
> _______________________________________________
> http://cool.haxx.se/mailman/listinfo/rockbox
>

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Received on Thu Jul 7 15:35:02 2005

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