[pulseaudio-discuss] GSoC Proposal: Resampling Improvements

[Peter Meerwald]

Hello,

> > > > What I would like to do over the summer:
> > > >     - enable resampling with libav
> > > >     - write some test coverage for the libav resampling method
> > > >     - deprecate the ffmpeg resample method
> > > >     - update the speex resample method

> > > > The ideas page mentions also libresample, if I'm not mistaken pulseaudio
> > > > already supports resampling via libresample and I'm not sure what would I
> > > > need to do about this.
> > > 
> > > By "libresample", I guess you mean "libsamplerate". Peter can correct me
> > > if I'm intepreting him wrong, but my understanding is that libsamplerate
> > > was only mentioned as an example of a resampler with a problematic
> > > license. I don't know either what should be done about it - perhaps the
> > > idea was to compare the different resamplers, and if it turns out that
> > > we don't have any good reason to keep using libsamplerate, we could drop
> > > that code.

libsamplerate was mentioned because of the GPL license;
to work around, a loadable module interface could be offered, so the user 
can decide

> > > > Speex has been obsoleted [2] and the resampler seems to had been moved to
> > > > opus-tools. There are some interesting commits [3] inside this repo and I think
> > > > it would be nice to update our speex resample method although I'm not sure
> > > > if it's ok to drop speex and replace it with opus-tools just like that.

> > > To me replacing the speex resampler with the opus-tools resampler sounds
> > > like an obvious thing to do, if the upstream says that the speex
> > > resampler code is deprecated in favour of opus-tools.

yeah, there seem to be interesting fixes/improvements

p.

-- 

Peter Meerwald
+43-664-2444418 (mobile)