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Re: [ts-7000] can ts-7300 handle floating point intensive stuff like ogg

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Subject: Re: [ts-7000] can ts-7300 handle floating point intensive stuff like ogg playback
From: uhmgawa <>
Date: Thu, 25 May 2006 13:09:06 -0400
Mike Taht wrote:
> In theory the mavcrunch should be good for floating point assist and be 
> of great use for floating point intensive ops.
> 
> In actuality the toolchain doesn't do it. You can, with some effort, 
> generate a static binary that has maverick crunch support, but that 
> barely works, and threads and shared libraries are right out.
> 
> I note that there is a fixed point ogg decoder called "tremor", perhaps 
> that will have enough oomph to do ogg.
> 
> http://www.xiph.org/vorbis/

I've heard a fixed point decoder was underway for
vorbis years back but never followed up.  It would
be interesting to see what bandwidth that consumes
on a 93xx.  I'm using libmad in my decoder and find
a bandwidth consumption of about 32% running at a
166Mhz clock rate.

Although I haven't done the comparison myself I hear
empirical reports of floating vs. fixed point decode
algorithms to net roughly the same bandwidth consumption.
BTW, mad is used in applications even where hardware
floating point support exists due to the accuracy of
its decode algorithm.

> On 5/24/06, *Dustin Harriman* < 
> <>> wrote:
> 
>     Hi,
> 
>     I've heard that on some other ARM based boards, like the NSLU2, floating
>     point calculation completely sucks.  So if you want to use one as a
>     music
>     jukebox, you need to use madplay (which uses only fixed point
>     operations,
>     but is limited to playing only .mp3), or use some kind of audio-over-tcp
>     mechanism where some other machine does the floating point for you, and
>     sends TCP packets that contain the audio that can be easily played.
> 
>     How does the ts-7300 fair in this department?  Perhaps that
>     "Maverickrunch" thingy in the ARM does good floating point operation?
> 
>     Basically, I want to know if it's worth my time to buy a (Creative
>     Labs)
>     USB sound card so I can play my .ogg collection in xmms on my ts-7300.
> 
>     Thanks,
> 
>     Dustin Harriman
>     http://annexia.ca/
>     RSS feed of my blog: http://annexia.ca/news/RSS
> 
> 
> 
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> -- 
> Mike Taht
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