SMW Central SPC Player

The online SNES SPC700 player used by SMW Central.

• Usage
  • Loading SPC files
  • Playlists
  • Events
  • Custom interface
• Building
• License
• Credits

Usage

Load the stylesheet and the SPC player script:

<link rel="stylesheet" href="https://unpkg.com/@smwcentral/[email protected]/dist/spc_player.css">
<script src="https://unpkg.com/@smwcentral/[email protected]/dist/spc.js"></script>

You must also include the HTML from spc_player.html somewhere on the page.

After the DOM is ready, the SMWCentral.SPCPlayer namespace will be globally available.

Loading SPC files

You can call:

• SMWCentral.SPCPlayer.loadFromLink with an HTMLAnchorElement (i.e. an <a> element) to fetch and play its href (which should be an SPC file).
• SMWCentral.SPCPlayer.loadSPC with an ArrayBuffer containing an SPC file.
• SMWCentral.SPCPlayer.loadSong with a song data object.

The song data objects used by loadSong have the following structure:

interface Song {
    index: number; /* Index of the song within the playlist */
    files: string[]; /* Filenames in the playlist */
    filename: string; /* Filename of the SPC */
    title: string;
    game: string;
    comment: string;
    date: string;
    duration: number;
    fade: number; /* Fade-out duration before ending the SPC (if not looping) */
    author: string;
    spc?: ArrayBuffer; /* SPC file to play */
    data?: string; /* If `spc` is `undefined`, base64-encoded SPC file to play */
}

Playlists

Two steps are necessary to show a playlist in the SPC player.

First, you have to play the SPC using the low-level SMWCentral.SPCPlayer.loadSong. Set index, files, and filename appropriately. To make this easier, you can use SMWCentral.SPCPlayer.parseSPC to extract the ID666 tags from an ArrayBuffer containing an SPC file.

To make the playlist items interactive, set SMWCentral.SPCPlayer.createPlaylistItem to a function that returns an HTMLLIElement (i.e. an <li> element). This function will be given, in order, the song that's currently playing (as a song data object), a filename of an SPC (from the files property of the song), and the index of that file within the playlist.

Events

If the player runs into an error, SMWCentral.SPCPlayer.onError will be called with an error message. By default, the message is directly passed into window.alert.

When a button in the interface is clicked, the following functions are called:

• SMWCentral.SPCPlayer.onPlay
• SMWCentral.SPCPlayer.onPause
• SMWCentral.SPCPlayer.onRestart
• SMWCentral.SPCPlayer.onStop

If the user turns off looping, SMWCentral.SPCPlayer.onEnd is called when the SPC ends.

Custom interface

You can use any HTML and CSS for the SPC player. Check src/interface.js for a list of elements that must exist.

Building

Building requires the Emscripten SDK. Execute npm run build to compile production-ready files in dist/, or npm run build-dev for an unminified development build.

License

Released under the GNU Lesser General Public License v2.1.

Credits

Built and maintained by Telinc1. SMW Central is property of Noivern.

Uses Blargg's snes_spc library and logic from cosinusoidally's snes_spc_js, both licensed under the GNU Lesser General Public License v2.1.