is-m4a

Check if a Buffer/Uint8Array is a m4a file.

Install

$ npm install --save is-m4a

$ bower install --save is-m4a

$ component install hemanth/is-m4a

Usage

Node.js

var readChunk = require('read-chunk'); // npm install read-chunk
var isM4a = require('is-m4a');
var buffer = readChunk('meow.m4a', 0, 8);

isM4a(buffer);
//=> true

Browser

var xhr = new XMLHttpRequest();
xhr.open('GET', 'meow.m4a');
xhr.responseType = 'arraybuffer';

xhr.onload = function () {
	isM4a(new Uint8Array(this.response));
	//=> true
};

xhr.send();

API

isM4a(buffer)

Accepts a Buffer (Node.js) or Uint8Array.

It only needs the first 4 bytes.

License

MIT © Hemanth.HM