arithmetic-coding

arithmetic-coding

Installation

Install as module for API usage:

npm i arithmetic-coding

Or install as global CLI:

npm i -g arithmetic-coding

API

From file path:

const ariCoding = require('arithmetic-coding');
// Encode from file
ariCoding.encode(__dirname + '/txt/long.txt', __dirname + '/txt/long-encoded.txt');
// Decode from file
ariCoding.decode(__dirname + '/txt/long-encoded.txt', __dirname + '/txt/long-decoded.txt');

From Buffer:

let data = Buffer.from('Example data', 'utf8');
// Encode from Buffer
let encoded = encode.encodeFromBuffer(data);
console.log(`encoded = ${encoded}`);
// Decode from buffer
let decoded = decode.decodeFromBuffer(encoded);
console.log(`decoded = ${decoded}`);

Command-line interface

$ ari-coding -h
Usage: index [options] [command]

Options:
  -v, --version              output the version number
  -h, --help                 output usage information

Commands:
  encode|e [options] <file>  encode a file
  decode|d [options] <file>  decode a file

About the algorithm

1. Wikipedia
2. How to implement practical encoder/decoder
3. Reference-arithmetic-coding on GitHub

Changelog

v1.1.0

2019.03.30

• Added Buffer support.