Struct faiss::CodePacker

struct CodePacker

Packing consists in combining a fixed number of codes of constant size (code_size) into a block of data where they may (or may not) be interleaved for efficient consumption by distance computation kernels. This exists for the “fast_scan” indexes on CPU and for some GPU kernels.

Subclassed by faiss::CodePackerFlat, faiss::CodePackerPQ4

Public Functions

virtual void pack_1(const uint8_t *flat_code, size_t offset, uint8_t *block) const = 0

virtual void unpack_1(const uint8_t *block, size_t offset, uint8_t *flat_code) const = 0

virtual void pack_all(const uint8_t *flat_codes, uint8_t *block) const

virtual void unpack_all(const uint8_t *block, uint8_t *flat_codes) const

inline virtual ~CodePacker()

Public Members

size_t code_size

size_t nvec

size_t block_size