Variable VirtualOffsetUtils`Const`

VirtualOffsetUtils: VirtualOffsetUtilsType = ...

Virtual offset utilities for BGZF-compressed BAM files

Virtual offsets combine BGZF block offset (48 bits) with uncompressed offset within the block (16 bits) to enable random access to compressed data.

Example

const virtualOffset = VirtualOffsetUtils.pack(1024, 512);
const { blockOffset, uncompressedOffset } = VirtualOffsetUtils.unpack(virtualOffset);