Speex dev - Nov 2006 - Speex WBB decoder on AT91SAM7S microcontroller?

Hi,

I would like to compile the Speex fixed-point, WB decoder for an 
AT91SAM7S256 ARM7 microcontroller using gcc-arm-elf and was wondering, 
before I roll up my sleeves and try to figure out all the autoconf 
things that I'm really unfamiliar with, if anyone else has done this and 
can share their experiences.

I see in the archives that some folk have compiled for this processor 
before but I am not sure if that included the WB decoder.

Basically I'm anxious to know what the resource requirements are for the 
fixed-point WB decoder on its own and how difficult it is to strip out 
what I don't need. I only need to support 32ksps, mono.

Any pointers or suggestions would be greatly appreciated.

Regards,
Dennis.

Stripping out usused stuff is very easy, especially with static
libraries. The only thing that could cause problem is the speed of the
CPU. It's very hard to say what the requirements are because it depends
a lot on the exact CPU you're using and (for ARM) the configuration of
the cache and the speed of the bus.

	Jean-Marc

Dennis Greenwood a ?crit :
> Hi,
> 
> I would like to compile the Speex fixed-point, WB decoder for an
> AT91SAM7S256 ARM7 microcontroller using gcc-arm-elf and was wondering,
> before I roll up my sleeves and try to figure out all the autoconf
> things that I'm really unfamiliar with, if anyone else has done this
and
> can share their experiences.
> 
> I see in the archives that some folk have compiled for this processor
> before but I am not sure if that included the WB decoder.
> 
> Basically I'm anxious to know what the resource requirements are for
the
> fixed-point WB decoder on its own and how difficult it is to strip out
> what I don't need. I only need to support 32ksps, mono.
> 
> Any pointers or suggestions would be greatly appreciated.
> 
> Regards,
> Dennis.
> 
> 
> _______________________________________________
> Speex-dev mailing list
> Speex-dev@xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev
> 
>

Jean-Marc Valin wrote:
>  Stripping out usused stuff is very easy, especially with static
>  libraries.
Thanks, that's encouraging to hear 8^).
>  The only thing that could cause problem is the speed of the CPU. It's
>  very hard to say what the requirements are because it depends a lot
>  on the exact CPU you're using and (for ARM) the configuration of the
>  cache and the speed of the bus.
>
Yes, this is the part that I'm hoping someone who's also used this CPU 
can shed some light on. I guess I'll know soon enough...

I am *really* hoping to be able to decode WB files in real time at 
24MHz. I can go up to 55MHz but the power consumption will then be a 
problem.

-Dennis.
>  Dennis Greenwood a ?crit :
>
> > Hi,
> >
> > I would like to compile the Speex fixed-point, WB decoder for an
> > AT91SAM7S256 ARM7 microcontroller using gcc-arm-elf and was
> > wondering, before I roll up my sleeves and try to figure out all
> > the autoconf things that I'm really unfamiliar with, if anyone
else
> > has done this and can share their experiences.
> >
> > I see in the archives that some folk have compiled for this
> > processor before but I am not sure if that included the WB decoder.
> >
> >
> > Basically I'm anxious to know what the resource requirements are
> > for the fixed-point WB decoder on its own and how difficult it is
> > to strip out what I don't need. I only need to support 32ksps,
> > mono.
> >
> > Any pointers or suggestions would be greatly appreciated.
> >
> > Regards, Dennis.
<snip>