The source from this directory was copied from the libvorbis subversion repository using the update.sh script. The only changes made were those applied by update.sh and the addition/update of Makefile.in and moz.build files for the Mozilla build system. The upstream version used was libvorbis 1.3.4. https://svn.xiph.org/tags/vorbis/libvorbis-1.3.4@19059 Some files are renamed during the copy to prevent clashes with object file names with other Mozilla libraries.