Cordova Native Audio Plugin

Cordova / PhoneGap 3.5+ extension for Native Audio playback, aimed at HTML5 gaming and audio applications which require minimum latency, polyphony and concurrency.

Original Plugin

This Plugin is forked by this Fork and has some added features.

Contents

1. Description
2. Supported Platforms
3. Installation
4. Usage
5. API

Description

This Cordova / PhoneGap (3.5+) plugin enables concurrency (multi-channel playback), polyphony (multi-voice playback) and minimized latency (via caching) in audio-based applications, by leveraging native audio APIs. Designed for the use in HTML5-based cross-platform games and mobile/hybrid audio applications.

Supported Platforms

• iOS
• Android

Installation

Via Cordova CLI:

cordova plugin add cordova-plugin-advanced-nativeaudio

Usage

1. Wait for deviceReady.
2. Preload an audio asset and assign an id - either optimized for single-shot style short clips (preloadSimple()) or looping, ambient background audio (preloadComplex())
3. play() the audio asset via its id.
4. unload() the audio asset via its id.

API

Preloading

preloadSimple: function ( id, assetPath, successCallback, errorCallback)

Loads an audio file into memory. Optimized for short clips / single shots (up to five seconds). Cannot be stopped / looped.

Uses lower-level native APIs with small footprint (iOS: AudioToolbox/AudioServices). Fully concurrent and multichannel.

• params
• id - string unique ID for the audio file
• assetPath - the relative path or absolute URL (inluding http://) to the audio asset.
• successCallback - success callback function
• errorCallback - error callback function

preloadComplex: function ( id, assetPath, volume, voices, delay, successCallback, errorCallback)

Loads an audio file into memory. Optimized for background music / ambient sound. Uses highlevel native APIs with a larger footprint. (iOS: AVAudioPlayer). Can be stopped / looped and used with multiple voices. Can be faded in and out using the delay parameter.

Volume & Voices

The default volume is 1.0, a lower default can be set by using a numerical value from 0.1 to 1.0.

By default, there is 1 vice, that is: one instance that will be stopped & restarted on play(). If there are multiple voices (number greater than 0), it will cycle through voices to play overlapping audio.

Change the float-based delay parameter to increase the fade-in/fade-out timing.

Playback

• params
• id - string unique ID for the audio file
• assetPath - the relative path to the audio asset within the www directory
• volume - the volume of the preloaded sound (0.1 to 1.0)
• voices - the number of multichannel voices available
• successCallback - success callback function
• errorCallback - error callback function

play: function (id, successCallback, errorCallback, completeCallback)

Plays an audio asset.

• params:
• id - string unique ID for the audio file
• successCallback - success callback function
• errorCallback - error callback function
• completeCallback - error callback function

loop: function (id, successCallback, errorCallback)

Loops an audio asset infinitely - this only works for assets loaded via preloadComplex.

• params
• ID - string unique ID for the audio file
• successCallback - success callback function
• errorCallback - error callback function

stop: function (id, successCallback, errorCallback)

Stops an audio file. Only works for assets loaded via preloadComplex.

• params:
• ID - string unique ID for the audio file
• successCallback - success callback function
• errorCallback - error callback function

unload: function (id, successCallback, errorCallback)

Unloads an audio file from memory.

• params:
• ID - string unique ID for the audio file
• successCallback - success callback function
• errorCallback - error callback function

setVolumeForComplexAsset: function (id, volume, successCallback, errorCallback)

Changes the volume for preloaded complex assets.

• params:
• ID - string unique ID for the audio file
• volume - the volume of the audio asset (0.1 to 1.0)
• successCallback - success callback function
• errorCallback - error callback function

Example Code

In this example, the resources reside in a relative path under the Cordova root folder "www/".

if (window.plugins && window.plugins.NativeAudio) {

    // Preload audio resources
    window.plugins.NativeAudio.preloadComplex('music', 'audio/music.mp3', 1, 1, 0, function (msg) {
    }, function (msg) {
        console.log('error: ' + msg);
    });

    window.plugins.NativeAudio.preloadSimple('click', 'audio/click.mp3', function (msg) {
    }, function (msg) {
        console.log('error: ' + msg);
    });


    // Play
    window.plugins.NativeAudio.play('click');
    window.plugins.NativeAudio.loop('music');


    // Stop multichannel clip after 60 seconds
    window.setTimeout(function () {

        window.plugins.NativeAudio.stop('music');

        window.plugins.NativeAudio.unload('music');
        window.plugins.NativeAudio.unload('click');

    }, 1000 * 60);
}