Identity Codec

The Identity codec is a simple pass-through mechanism that stores planes as raw bytes without any compression.

Theory

Certain planes may be mathematically incompressible (e.g., cryptographic nonces or highly dense random mantissas). The trial-encoding dispatcher evaluates the Identity codec alongside Huffman and rANS. If the entropy coders fail to compress the data (or if they expand it due to header overhead), the dispatcher selects the Identity codec to ensure the payload is never larger than the original raw bytes.

Usage

This codec accepts any plane descriptor. It writes a zero-byte state and directly copies the payload.