2.1.67 • Published 5 days ago

@thi.ng/range-coder v2.1.67

Weekly downloads
279
License
Apache-2.0
Repository
github
Last release
5 days ago

range-coder

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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

Search or submit any issues for this package

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 import:

<script type="module" src="https://cdn.skypack.dev/@thi.ng/range-coder"></script>

Skypack documentation

For Node.js REPL:

# with flag only for < v16
node --experimental-repl-await

> const rangeCoder = await import("@thi.ng/range-coder");

Package sizes (gzipped, pre-treeshake): ESM: 678 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

If this project contributes to an academic publication, please cite it as:

@misc{thing-range-coder,
  title = "@thi.ng/range-coder",
  author = "Karsten Schmidt",
  note = "https://thi.ng/range-coder",
  year = 2017
}

License

© 2017 - 2021 Karsten Schmidt // Apache Software License 2.0

arraybinarycompressionentropypackertypescript
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