reversebuffer's Introduction

reversebuffer

Returns a reverse buffer of AudioBuffer from an original AudioBuffer.

A reverse buffer mimics a "backward" playback of an audio source when it is being played forward normally.

This tiny library uses Web Audio API.

Usage:

var reversebuffer = require("reversebuffer");

var audioContext = new AudioContext();

// Make an AudioBuffer or get decode it from a file.
var bufferSource = audioContext.createBuffer();

// In turn returns a reversed AudioBuffer
var revBuffer = reversebuffer({
	buffer: bufferSource,
	context: audioContext
});

Use with WebAudioLoader

WebAudioLoader deals with loading an audiofile over an url or FileObject and returns an AudioBuffer.

var WebAudioLoader = require("webaudioloader");
var reversebuffer = require("reversebuffer");

var audioContext = new AudioContext();

var originalBuffer = null;

var wal = new WebAudioLoader({
	context: audioContext,
	cache: true,
	onprogress: function (evt){
		console.log("loading soundfiles", evt);
	}
});

// Load a dummy audiofile

wal.load("http://yourdomain.com/youraudiofilename.mp3", {
	onload: function(err, buffer){
		if(!err){
			originalBuffer = buffer;
		}
	}
});

var reverseBuffer = reversebuffer({
	buffer: originalBuffer,
	context: audioContext
});

Install

npm

npm install --save-dev reversebuffer
Using browserify

var reversebuffer = require("reversebuffer");
Standalone (global object, AMD) builds are here

API

var revBuffer = reversebuffer(options);

option object have this arguments
- buffer: AudioBuffer - buffer source to be reversed
- context: AudioContext - an AudioContext to use for decoding the audio
returns an AudioBuffer which is reversed.

var revBuffer = reversebuffer(audioBuffer);