IETF Opus audio codec reference implementation.

The source in this directory was copied from an opus
repository checkout by running the ./update.sh script.
Any changes made to this version of the source should
be reflected in that script, e.g. by applying patch
files after the copy step.

The upstream repository is https://git.xiph.org/opus.git

The git tag/revision used was 2654707e86cc94413998976d179b2ab4a2aa3114.
