Method encode

nodedb-vector/src/quantize/pq_codec.rs:66–80

Encode an FP32 vector: one centroid index byte per subspace. # Panics `UnifiedQuantizedVector::new` fails only when the outlier bitmask does not match the provided outlier slice. With `outlier_bitmask = 0` and an empty slice this can never happen. The `expect` is therefore unreachable in practice.

(&self, v: &[f32])

    /// empty slice this can never happen. The `expect` is therefore unreachable
    /// in practice.
    fn encode(&self, v: &[f32]) -> Self::Quantized {
        let codes = self.encode(v);
        let header = QuantHeader {
            quant_mode: QuantMode::Pq as u16,
            dim: self.dim as u16,
            global_scale: 0.0,
            residual_norm: 0.0,
            dot_quantized: 0.0,
            outlier_bitmask: 0,
            reserved: [0; 8],
        };
        let uqv = UnifiedQuantizedVector::new(header, &codes, &[])
            .expect("PqCodec::encode: layout construction is infallible (no outliers)");
        PqQuantized(uqv)
    }

    /// Prepare the query by precomputing the M×K asymmetric distance table.
    ///