Skip to content

Latest commit

 

History

History

range-coder

Folders and files

NameName
Last commit message
Last commit date

parent directory

..
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

range-coder

npm version npm downloads Twitter Follow

This project is part of the @thi.ng/umbrella monorepo.

About

Binary range encoder / decoder, based on Java implementation by Joe Halliwell.

Status

STABLE - used in production

Related packages

  • @thi.ng/bitstream - ES6 iterator based read/write bit streams with support for variable word widths
  • @thi.ng/rle-pack - Binary run-length encoding packer w/ flexible repeat bit widths

Installation

yarn add @thi.ng/range-coder
// ES module
<script type="module" src="https://unpkg.com/@thi.ng/range-coder?module" crossorigin></script>

// UMD
<script src="https://unpkg.com/@thi.ng/range-coder/lib/index.umd.js" crossorigin></script>

Package sizes (gzipped, pre-treeshake): ESM: 670 bytes / CJS: 725 bytes / UMD: 762 bytes

Dependencies

API

Generated API docs

import * as rc "@thi.ng/range-coder";

// prepare dummy data
src = new Uint8Array(1024);
src.set([1,1,1,1,1,2,2,2,2,3,3,3,4,4,5,4,4,3,3,3,2,2,2,2,1,1,1,1,1], 512);

// pack data
packed = rc.encodeBytes(src);

packed.length
// 146

packed.length/src.length
// 0.142578125

// unpack
dest = rc.decodeBytes(packed);

Authors

Karsten Schmidt

License

© 2017 - 2020 Karsten Schmidt // Apache Software License 2.0