Interface AdvancedLzwDecodeOptions

Advanced options, allowing for full control of the initial dictionary/decoding state.

Example: Using a custom LZW dictionary for decoding.

import { Lzw } from '@4bitlabs/codecs';

const dictionary = [
  Lzw.EOF_MARKER,
  0x41, // A
  0x42, // B
  0x43, // C
  0x44, // D
];

const bytes = Lzw.unpack(encodedBytes, { dictionary });
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Example: Decoding with extended codes in LZW dictionary.

Longer codings can be encoded in the dictionary by using either an array of numbers of with a Uint8Array:

import { Lzw, EOF_MARKER } from '@4bitlabs/codecs';

const dictionary = [
  Lzw.EOF_MARKER,
  Uint8Array.of(0x47, 0x41, 0x54, 0x41), // GATA
  Uint8Array.of(0x41, 0x54, 0x54, 0x41), // ATTA
  Uint8Array.of(0x43, 0x47, 0x41, 0x54), // CGAT
  Uint8Array.of(0x41, 0x43, 0x41, 0x47), // ACAG
];

const bytes = Lzw.unpack(encodedBytes, { dictionary });
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