We're using a (very slightly) modified WMA Pro decoder to handle XMA packets. The diff used is included.

Updating

Windows

1. Install MSYS2 x64
2. pacman -Sy
3. pacman -S patch yasm
4. mv /usr/bin/link /usr/bin/link-bak
5. Launch msys shell
6. "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\amd64\vcvars64.bat"
7. 'which links.exe' must return the x64 linker
8. ./build.sh

Credits

Original XMA patch: https://github.com/koolkdev/libertyv/tree/master/ffmpeg

Original build/implementation: @DrChat