wav-encoder's Introduction

wav-encoder

isomorphic wav data encoder

Installation

npm:

npm install wav-encoder

bower:

bower install wav-encoder

downloads:

API

WavEncoder

constructor([format: object])
- format
  - bitDepth: number = 16
  - floatingPoint: boolean = false

Class methods

canProcess(format: object): string
encode(audioData: object, [format: object]): Promise<ArrayBuffer>
- audioData
  - sampleRate: number
  - channelData: Float32Array[]

Instance methods

canProcess(format: object): string
encode(audioData: object, [format: object]): Promise<ArrayBuffer>
- audioData
  - sampleRate: number
  - channelData: Float32Array[]

Usage

node.js

var fs = require("fs");
var WavEncoder = require("wav-encoder");

var audioData = {
  sampleRate: 44100,
  channelData: [
    new Float32Array(100),
    new Float32Array(100),
  ]
};

function arrayBufferToBuffer(buffer) {
  return new Buffer(new Uint8Array(buffer));
}

WavDecoder.encode(audioData).then(function(buffer) {
  fs.writeFileSync("foobar.wav", arrayBufferToBuffer(buffer));
});

browser

<script src="/path/to/wav-encoder.js"></script>

var audioData = {
  sampleRate: 44100,
  channelData: [
    new Float32Array(100),
    new Float32Array(100),
  ]
};

function arrayBufferToBase64(buffer) {
  return btoa([].slice.call(new Uint8Array(buffer)).map(String.fromCharCode).join(""));
}

WavEncoder.encode(audioData).then(function(buffer) {
  new Audio("data:audio/wav;base64," + arrayBufferToBase64(buffer)).play();
});