libvorbis.js

What?

libvorbis.js is an ASM.JS distribution of C libraries libogg, libvorbis, and libvorbisenc. It also includes a library wrapper that implements the W3C MediaRecorder interface**.

Ultimately, libvorbis.js allows you to encode PCM data to Ogg Vorbis in the browser. Ogg Vorbis is a free and open-source codec for lossy audio compression.

libvorbis.js is 216KB big (minified, gzipped) and runs about 3x slower in V8, compared to native. (2.5x in Firefox).

** Full compliance under development.

Why?

Yes, Firefox already supports the MediaRecorder API, which renders this library useless.

Unfortunately, Chromium (Chrome) does not yet ship a public, audio-capable implementation of MediaRecorder. (It should arrive with Chromium 49.)

libvorbis.js aims to fill this void for the time being.

Besides this, encoding audio in the browser is beneficial in the following ways:

• Reduces server load; all the hard work is done in the client's browser

• Reduces browser storage usage (IndexedDB / Web Storage)

• Reduces upload time and data transfer; encoded audio files are a fraction of the size of raw WAV files

OK, cool. What now?

Demo it.

Bare bones recorder

Voice Memos fork (original by: Paul Lewis)

Install it.

You can use bower to install libvorbis.js as a dependency:

bower install libvorbis.js

Download it.

Download from the distribution repo.

Build it.

Requirements

• emscripten compiler
• node.js & npm

Preparations

npm install --dev

That should install (locally):

• TypeScript 1.8+ compiler
• TypeScript Definition Manager
• UglifyJS

Instructions

git submodule init
git submodule update
make -j

Then, look for build/libvorbis.js or build/libvorbis.min.js.

Credits

• Alex Barkan
• Devon Govett
• Salehen Shovon Rahman
• Jose Sullivan

Ogg License (BSD)

Copyright (c) 2002, Xiph.org Foundation

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

• Neither the name of the Xiph.org Foundation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Vorbis License (BSD)

Copyright (c) 2002-2015 Xiph.org Foundation

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

• Neither the name of the Xiph.org Foundation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.