I noticed more DSD encoded files use a WavPack container. Since I am a music player developer, I am interested in adding WavPack/DSD support as well. Where can I get more information about DSD support?
First of all, that's very cool you're seeing more WavPack DSD files!
As for adding support, that would be great! Here are a couple documents to start with, and please feel free to ask me any questions you have, either here or directly (e-mail address available at WavPack website (http://www.wavpack.com)).
Guide to using the WavPack library (libwavpack) (http://www.wavpack.com/WavPack5LibraryDoc.pdf)
Guide to new features added for version 5 (including DSD) (http://www.wavpack.com/WavPack5PortingGuide.pdf)