Method decode

nodedb-vector/src/quantize/pq.rs:193–201

Decode a PQ code back to an approximate FP32 vector. Charges `dim * size_of:: ()` bytes to the governor (if set) before allocating the output buffer.

(&self, code: &[u8])

    /// Charges `dim * size_of::<f32>()` bytes to the governor (if set)
    /// before allocating the output buffer.
    pub fn decode(&self, code: &[u8]) -> Result<Vec<f32>, VectorError> {
        debug_assert_eq!(code.len(), self.m);
        let _g = try_reserve_or_skip(&self.governor, self.dim * size_of::<f32>())?;
        let mut out = Vec::with_capacity(self.dim);
        for (sub, &c) in code.iter().enumerate() {
            out.extend_from_slice(&self.codebooks[sub][c as usize]);
        }
        Ok(out)
    }

    /// Serialize the codec to bytes with a versioned magic header.
    ///