Sadly enough, as a lot of compression guy, they release only the code source of the implementation of the algorithm, the understanding of it is let as an exercise to the reader I suppose.
Take a look at https://github.com/facebook/zstd/wiki/Zstandard-Compression-Format and https://github.com/Cyan4973/FiniteStateEntropy/wiki
Sadly enough, as a lot of compression guy, they release only the code source of the implementation of the algorithm, the understanding of it is let as an exercise to the reader I suppose.
Take a look at https://github.com/facebook/zstd/wiki/Zstandard-Compression-Format and https://github.com/Cyan4973/FiniteStateEntropy/wiki