Message-ID: <41A67F77.3040501@dark-reality.de>
From: Lars Grunewaldt <lgw@dark-reality.de>
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To: bluez-devel@lists.sourceforge.net
Subject: Re: [Bluez-devel] more encoder stuff
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Date: Fri, 26 Nov 2004 01:57:27 +0100

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Marcel Holtmann wrote:
| Hi Lars,
|
|
|>| we can optimize at any time if needed, because the SBC API should hide
|>| this stuff. For me this sounds perfect for a diploma thesis for someone
|>| interested in audio codec stuff and Bluetooth.
|>
|>*raising hand*
|>
|>thing is, on modern CPU you won't get much speedup with fixed point
|>stuff, because the main advantage was eliminated by Intel when they
|>build the pseudo-pipes into their FPU's.
|>But of course there are still some cycles to kill in audio processing
|>always. I'll advertise this project to my professor...
|
|
| a non floating point version is interesting for embedded platforms

good argument

| and
| not all desktops are running with a 3 GHz processor. I think what the
| MAD library does is very good and their MP3 decoding is fast.

Depending on the purpose of the calculations fixed point calculations
add an overhead that can - in some situations - eat up the speed gain
compared to true fpu.

But as you said, not all systems run on CPU/FPU combinations with the
specs of a modern desktop computer, and in fact this is important for
bluetooth stuff as many portable devices also use linux nowadays.

So I think we both have a point, but yours matches the BlueZ situation
much better than mine :)

Not used to it. Strange enough, as I program for PalmOS quite a lot...

cu,
~  Lars
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