[gst-devel] [PATCH] audioconvert: add NEON acceleration for some conversions

[Rob Clark]

On Aug 10, 2009, at 9:59 AM, Sebastian Dröge wrote:

>
> FYI, David Schleef has partially converted audioconvert to use orc[0].
> Together with the orc VFP backend this would obsolete your patch I  
> guess.
>
> [0] http://cgit.freedesktop.org/~ds/gst-plugins-base/log/?h=orc

ahh, looks like so far just the integer unpack functions.  So not the  
two functions I needed (unpack_float_le and quantize_signed_tpdf_none)

Any rough estimate on timeframe for orc-ified audioconvert?  Is it  
worthwhile for me to try and cleanup my current patch to integrate as  
a temporary solution.  Or should I just try and learn orc and see if I  
could help there.

Also.. I saw something on David's blog about a NEON backend for orc,  
but not opensrc.  Anyone know if this is something that will  
eventually be opensrc?


To be honest, in most use-cases most of the multimedia related heavy- 
lifting on our platform is done by hw or DSP.  Most of the time we  
don't use audioconvert, audioresample, software volume, software  
colorspace conversion, etc, etc.  It is only a few cases (like this)  
where we need some NEON acceleration.  Is it possible to plug-in hand- 
written optimized versions of a few functions without needing a whole  
NEON backend for orc?


BR,
-R