AudioPlayr

An audio playback manager for persistent and on-demand themes and sounds.

Usage

Constructor

import { AudioPlayr } from "audioplayr";

const audioPlayer = new AudioPlayr();

audioPlayer.play("Hello world.mp3");

nameTransform

By default, provided names are treated as the src file names for their sounds. You can define a mapping of names to file names by providing a nameTransform method. It should take in a string and return a string.

const audioPlayer = new AudioPlayr({
    nameTransform: (name: string) => `Sounds/${name}.mp3`,
});

// Plays "Sounds/Hello world.mp3"
audioPlayer.play("Hello world");

Internally, all sound names will be transformed with the nameTransform.

storage

By default, mute and volume settings aren't kept from state to state. You can pass a storage parameter to an AudioPlayr to keep them locally. It should be an object with getItem(name: string): string and setItem(name: string, value: string) members, such as localStorage.

const audioPlayer = new AudioPlayr({
    storage: localStorage,
});

Keys that may be stored are:

• "muted": Whether sounds are muted.
• "volume": Global sound volume.

See Storage.ts for the AudioSetting enum and IAudioSettingsStorage interface.

play

Parameters:

• name: string: Name of the audio file, used as its src.
• settings: Object (optional): Any additional options.

Returns: Promise<void> for starting playback.

audioPlayer.play("beep.mp3");

If the same audio name is played twice, the first will be stopped before the second starts.

audioPlayer.play("beep.mp3");
// ...
audioPlayer.play("beep.mp3");

settings may contain any of the following keys:

• alias: Changes what name the sound will be stored under. Defaults to the given name.

  As with play, if two sounds with the same alias are played, the first will be stopped before the second starts.

  audioPlayer.play("Overworld.mp3", { alias: "Theme" });
  // ...
  audioPlayer.play("Underworld.mp3", { alias: "Theme" });
  

  If a nameTransform was provided, it's applied to this alias as well.

• loop: Whether the sound should loop continuously. Defaults to false.

  audioPlayer.play("Bloop.mp3", { loop: true });
  

• muted: Whether the sound should be muted. Defaults to false.

  audioPlayer.play("Boop.mp3", { muted: true });
  

  If the AudioPlayr is globally muted, muted: false will be ignored.

• volume: Volume as a number in [0, 1]. Defaults to 1.

  audioPlayer.play("Bop.mp3", { volume: 0.5 });
  

  The sound's playing volume is computed as this times the global volume.

getMuted

Returns: boolean for whether all sounds are muted.

getVolume

Returns: number in [0, 1] for global sound volume.

setMuted

Parameters:

• muted: boolean: Whether this all sounds are globally muted.

Returns: Promise<void> for setting whether all sounds are globally muted.

setVolume

Parameters:

• volume: number: number in [0, 1] for global sound volume.

Returns: Promise<void> for setting the global sound volume.

pauseAll

Returns: Promise<void> for pausing all sounds.

Pauses all sounds in parallel. This only affects sounds that are playing.

resumeAll

Returns: Promise<void> for resuming all sounds.

Resumes all sounds in parallel. This only affects sounds that are paused.

stopAll

Returns: Promise<void> for stopping all sounds.

Stops all sounds. Any individual sound settings are cleared.

hasSound

Parameters:

• alias: string: Alias to check under.
• name: string (optional): Name the sound must have, if not the same as alias.

Returns: boolean for whether a sound exists under the alias.

Development

After forking the repo from GitHub:

git clone https://github.com/<your-name-here>/AudioPlayr
cd AudioPlayr
npm install
npm run setup
npm run verify

• npm run setup creates a few auto-generated setup files locally.
• npm run verify builds, lints, and runs tests.

Building

npm run watch

Source files are written under src/ in TypeScript and compile in-place to JavaScript files. npm run watch will directly run the TypeScript compiler on source files in watch mode. Use it in the background while developing to keep the compiled files up-to-date.

Running Tests

npm run test

Tests are written in Mocha and Chai. Their files are written using alongside source files under src/ and named *.test.ts?. Whenever you add, remove, or rename a *.test.t* file under src/, watch will re-run npm run test:setup to regenerate the list of static test files in test/index.html. You can open that file in a browser to debug through the tests.