[Soc-2011-dev] Weekly progress report #9 - 3D Audio

[neXyon]

1) what you did this week

Resampling: I started by translating the linear resampler code from C++ 
to matlab because it's a lot easier to check how it works there. I found 
a lot of improvements I could do and also changed this in the C++ 
source, now the linear resampler is really good.

Next I started implementing a resampler based on Julius O. Smith's 
algorithm [1] in matlab. Unforunately I had no internet for three days 
this week which slowed me down not being able to look things up and a 
quite stupid bug also kept me from advancing. Anyway I managed to get a 
working version for upsampling so far, downsampling shouldn't be much 
work anymore and then this "only" needs to be translated to C++. Anyway 
the resampling method is pretty awesome and I already can create LUTs 
for the lowpass filter with different qualities and window functions 
(Kaiser, Hann, Hamming, Rectangulare, whatever).

Regarding the animation problem we unfortunately didn't have an amazing 
idea for a solution on the mailing list as I hoped for, but I have a 
pretty good picture in mind how I'll do this now.

Last but not least I also fixed some reported bugs.

2) what you will do next week

I think I'm going to pause the work on the resampling stuff as it's not 
a main and important task for the project and start on reworking the 
sequencer related code in the audio library also addressing the 
animation issues. First I'll write down a short design and then start 
implementing.

3) any problems that will require extra attention and the impact on

I just tried to merge pepper to salad and apart from subversion being 
really crappy when it comes to merging (eg. it detects conflicts where 
there are no differences at all) it also aborted just because the 
internet connection went down for some seconds and stopped the complete 
merge wanting me to redo everything. So I give up, I don't want to waste 
any more time on this, maybe someone else from the pepper branch is 
willing to merge to salad? I don't, sorry.

[1] https://ccrma.stanford.edu/~jos/resample/