[opus] Using opus on ATMEL 32-bit RISC microcontroller

Larry Fenske larry at towanda.com
Fri Aug 26 15:57:33 UTC 2016


By the way,
that comes out to 2.2 Kb/s, assuming Daniele's 8Mb is really 8 MB.  If it
really is 8 megabits, then that's 0.28 Kb/s.

- Larry

On Fri, Aug 26, 2016 at 9:40 AM, Daniele Barzotti <
daniele.barzotti at eurocomtel.com> wrote:

> Hi Jean-Marc,
>
> thanks a lot for your reply.
>
>
> > Well, the first question is whether you want encoding, decoding, or
> > both. If there's one you don't need then you can remove that
> > (unfortunately, there's no easy way right now).
>
> You're right! I forgot to say that I need only the encoder side (and
> only for voice).
>
> My application have to acquire a 16bit 8KHz PCM stream and save a
> compressed audio into a flash.
>
> (And here I have another little question...
> My flash size is 8Mb only and I have to be able to store in it 8 hours
> of voice, do you think opus shrink the stream enoguht?)
>
>
> > If you know that
> > you're always going to be encoding in SILK mode, or always in CELT-only
> > mode, then you can remove the encoder part you don't need.
>
> Ok, I think this is my case (if I'm not wrong) so, which you suggest to
> use?
>
>
> > Other than that, there's a --disable-float-api configure flag
> > (corresponding to DISABLE_FLOAT_API in the code) that makes it possible
> > to shave a few kB off the image by dumping all support for
> > floating-point.
>
> Since I'm using FIXED_POINT, I have to pass also --disable-float-api?
>
>
> > There's also a SMALL_FOOTPRINT macro that you can define
> > that will make the code a little smaller.
>
> Thanks I will give a try!
>
> Cheers,
> Daniele.
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