Enum RateBackend 

pub enum RateBackend {
    RosaPlus,
    Match {
        hash_bits: usize,
        min_len: usize,
        max_len: usize,
        base_mix: f64,
        confidence_scale: f64,
    },
    SparseMatch {
        hash_bits: usize,
        min_len: usize,
        max_len: usize,
        gap_min: usize,
        gap_max: usize,
        base_mix: f64,
        confidence_scale: f64,
    },
    Ppmd {
        order: usize,
        memory_mb: usize,
    },
    Mamba {
        model: Arc<Model>,
    },
    MambaMethod {
        method: String,
    },
    Rwkv7 {
        model: Arc<Model>,
    },
    Rwkv7Method {
        method: String,
    },
    Zpaq {
        method: String,
    },
    Mixture {
        spec: Arc<MixtureSpec>,
    },
    Particle {
        spec: Arc<ParticleSpec>,
    },
    Calibrated {
        spec: Arc<CalibratedSpec>,
    },
    Ctw {
        depth: usize,
    },
    FacCtw {
        base_depth: usize,
        num_percept_bits: usize,
        encoding_bits: usize,
    },
}

Sequential entropy/rate backend used by context-aware metrics.

Variants

RosaPlus

ROSA+ suffix-automaton estimator.

Match

Local contiguous match predictor.

Fields

hash_bits: usize

Number of retained hash bits for suffix lookup.

min_len: usize

Minimum repeat length required before predicting.

max_len: usize

Maximum repeat length used for confidence scaling.

base_mix: f64

Residual probability mass left for non-match symbols.

confidence_scale: f64

Confidence multiplier applied to short-match tapering.

SparseMatch

Sparse/gapped local match predictor.

Fields

hash_bits: usize

Number of retained hash bits for spaced-suffix lookup.

min_len: usize

Minimum spaced repeat length required before predicting.

max_len: usize

Maximum spaced repeat length used for confidence scaling.

gap_min: usize

Minimum gap between matched bytes.

gap_max: usize

Maximum gap between matched bytes.

base_mix: f64

Residual probability mass left for non-match symbols.

confidence_scale: f64

Confidence multiplier applied to short-match tapering.

Ppmd

Pure-Rust bounded-memory PPMD-style model.

Fields

order: usize

Maximum context order.

memory_mb: usize

Approximate memory budget in MiB.

Mamba

Mamba model loaded from explicit weights.

Fields

model: Arc<Model>

Loaded Mamba model.

MambaMethod

Mamba method string (e.g. file:... or cfg:...[;policy:...]) resolved lazily.

Fields

method: String

Mamba method string.

Rwkv7

RWKV7 model loaded from explicit weights.

Fields

model: Arc<Model>

Loaded RWKV7 model.

Rwkv7Method

RWKV7 method string (e.g. file:... or cfg:...[;policy:...]) resolved lazily.

Fields

method: String

RWKV7 method string.

Zpaq

ZPAQ compression-based rate model (streamable methods only).

Fields

method: String

ZPAQ method string (streamable modes only for rate estimation).

Mixture

Online mixture over rate-model experts (Bayes, fading Bayes, switching, MDL).

Fields

spec: Arc<MixtureSpec>

Mixture expert/runtime specification.

Particle

Particle-latent filter ensemble.

Fields

spec: Arc<ParticleSpec>

Particle filter specification.

Calibrated

Calibrated wrapper over another bytewise backend.

Fields

spec: Arc<CalibratedSpec>

Calibration specification.

Ctw

Action-Conditional CTW (single context tree).

Fields

depth: usize

Context tree depth.

FacCtw

Factorized Action-Conditional CTW (k trees for k-bit percepts).

Fields

base_depth: usize

Base context depth.

num_percept_bits: usize

Number of percept bits.

encoding_bits: usize

Encoding width in bits.

Trait Implementations

impl Clone for RateBackend

fn clone(&self) -> RateBackend

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for RateBackend

fn default() -> Self

Returns the “default value” for a type.