Unfortunately, Opus doesn't have a proper specification, instead relying on source code in several places to provide documentation through extrapolating what co

Unfortunately, Opus doesn't have a proper specification, instead relying on source code in several places to provide documentation through extrapolating what code intended. To quote Sean Barrett: Opus' non-public-domain code as spec is terrible. Independent implementation requires "clean room" = writing own specification! Sean is famous among the game developer community for providing a useful variety of public domain code (i'd call them libraries, but almost all are written to be used as a single-header file include): https://github.com/nothings/stb https://github.com/nothings/stb