Jai's ALAC encoder for FFmpeg SoC is going very well. Entropy coding and prediction are working. Adaptive prediction order and stereo decorrelation have been implemented, but are still works-in-progress. There is still an odd bug which generates non-lossless output when decoded. It's very rare from what I've found, and hopefully the cause will be tracked-down and fixed.
Even with the encoder as it is right now, it could be very easily cleaned-up for inclusion in FFmpeg SVN. The compression isn't great, but a decent working ALAC encoder is better than no encoder, and it's definitely on the right path to being a great encoder.
