entropy

ptwm_core::entropy::outcome

Typed return for the [huffman]crate::entropy::huffman and [rans]crate::entropy::rans compressors.

`ptwm_core::entropy::outcome`

Typed return for the [huffman]crate::entropy::huffman and [rans]crate::entropy::rans compressors.

rsmod

ptwm_core::entropy::outcome

crates/ptwm-core/src/entropy/outcome.rs:1

mod outcome

Typed return for the [`huffman`][crate::entropy::huffman] and [`rans`][crate::entropy::rans] compressors.

The thin public wrappers (`huffman::compress`, `rans::compress`) return `Result<usize, _>` for the pipeline layer and collapse every non-encoded path to `Ok(0)`. The per-plane codec layer needs to distinguish those cases so it can warn on unexpected fallbacks rather than silently emitting an `Ok(0)`. The `compress_outcome` entry points return this richer enum and the plane-codec wrappers inspect it before deciding whether to log.

rstype

ptwm_core::entropy::outcome::CompressOutcome

crates/ptwm-core/src/entropy/outcome.rs:14

pub enum CompressOutcome

Result of an entropy-coder compress attempt.

net

Tiny online-learning neural predictor: a trainable per-context embedding feeds a ReLU hidden layer and a linear output. Pure integer/fixed-point and fully deterministic, so encode and decode evolve in lockstep — losslessness does NOT depend on the net compressing well. No weights cross the wire.

rans

rANS (range Asymmetric Numeral Systems) entropy codec.