It will be out there by the end of the week, we already have ARM specific
64-bit precise version which runs within around 30 MIPS and does not sound
noisy, I'm finishing general 64-bit thing (uses long long for multiplication
result) to make it complete and currently integrating it into the a2dp code.
I'm on vacation now, so the progress is slow...
Victor.
----- Original Message -----
From: "Brad Midgley" <[email protected]>
To: <[email protected]>
Sent: Wednesday, August 17, 2005 17:03
Subject: Re: [Bluez-devel] SBC Fixed Point for A2Dp
> Roberto
>
>> I have read some transcoding to SBC fixed point somewhere , do you know
>> where become available ? We are working on a mobile version of A2DP with
>> headphones for Symbian and we would like to port this part of code to
>> mobile and deliver the library under LGPL
>
> I hope you are able to help us with this. We currently have no
> implementation. Victor Shcherbatyuk has been tinkering with fixed point
> but was getting noisy audio last I heard and has not contributed anything
> yet.
>
> If you look in sbc/sbc.h, you'll see some fixed point functions like
> fxmult and conversion functions. Currently, the precision is set to 20
> bits. This is probably not enough, but after you change it to get more
> precision, the fixed point tables in sbc_tables_f.h need to be
> regenerated; build gen_fixed.c by hand and run
>
> ./gen_fixed > sbc_tables_f.h
>
> to do that.
>
> Can I help in any other way?
>
> thanks!
> Brad
>
>
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