A tiny JS/TS wrapper around libopus compiled to WASM for browser and AudioWorklet use.

Installation

npm install opus-library

Usage

import { createEncoder, createDecoder } from 'opus-library';
import wasmBinary from 'opus-library/dist/opusCodec.wasm';

(async () => {
  // Create an encoder (48 kHz, mono, VOIP application)
  const encoder = await createEncoder(wasmBinary, 48000, 1, 2048);

  // Prepare a 20 ms frame at 48 kHz = 960 samples per channel
  const pcmFrame = new Float32Array(960);
  const encoded = encoder.encode(pcmFrame);
  encoder.destroy();

  // Create a decoder (48 kHz, mono)
  const decoder = await createDecoder(wasmBinary, 48000, 1);
  const decoded = decoder.decode(encoded);
  decoder.destroy();

  console.log(decoded.length); // should be 960
})();

License

MIT