Struct DeltaEncoder

pub struct DeltaEncoder {
    keyframe_interval: u32,
    threshold: f32,
}

Encodes vectors into keyframe + delta sequences.

Configuration:

• keyframe_interval: store a full vector every K updates
• threshold: minimum absolute change per dimension to include in delta (ε)

Fields

keyframe_interval: u32

threshold: f32

Implementations

impl DeltaEncoder

pub fn new(keyframe_interval: u32, threshold: f32) -> Self

Create a new delta encoder.

• keyframe_interval (K): store a full keyframe every K updates. K=10 means every 10th vector is stored in full.
• threshold (ε): minimum per-dimension change to include in delta. ε=0.001 means changes smaller than 0.001 are discarded.

pub fn encode( &self, sequence_index: u32, timestamp: i64, vector: &[f32], previous: Option<&[f32]>, ) -> DeltaEntry

Encode a vector, producing either a keyframe or a delta entry.

• sequence_index: the index of this vector in the entity’s sequence (0, 1, 2, …)
• timestamp: the timestamp for this vector
• vector: the full vector
• previous: the previous full vector (None for the first vector)

Returns a DeltaEntry. If it’s a keyframe, the full vector should be stored separately; if it’s a delta, only the sparse changes are stored.

pub fn keyframe_interval(&self) -> u32

The configured keyframe interval.

pub fn threshold(&self) -> f32

The configured threshold (ε).