HTML and CSS Reference
In-Depth Information
// Find a supported type
extension =
_(Q.options.audioSupported)
.detect(function(extension) {
return snd.canPlayType(Q.audioMimeTypes[extension]) ?
extension : null;
});
// No supported audio = trigger ok callback anyway
if(!extension) {
callback(key,null);
return;
}
// If sound is turned off,
// call the callback immediately
$(snd).on('error',errorCallback);
$(snd).on('canplaythrough',function() {
callback(key,snd);
});
snd.src = Q.options.audioPath + baseName + "." + extension;
snd.load();
return snd;
};
// Loader for other file types, just store the data
// returned from an ajax call
Q.loadAssetOther = function(key,src,callback,errorCallback) {
$.get(Q.options.dataPath + src,function(data) {
callback(key,data);
}).fail(errorCallback);
};
Each of the three loader methods performs the same task with a different asset type, which amounts to provid-
ing a consistent call to a callback containing the passed in key and the loaded object in question. A helper meth-
od to remove the extension from a filename is also defined.
Q.loadAssetImage
creates an
Image
object and links the callback to the load event method.
Q.loadAssetOther
just uses the jQuery
get
method to load data into a buffer and trigger the callback
when it's loaded.
Finally, the
Q.loadAssetAudio
creates an
Audio
element and then determines if the
Audio
tag is
available or whether sound is turned on normally. In cases in which the sound tag isn't supported, or the sound
is turned off, the method calls the callback immediately and returns.
The
Audio
loader also needs to do some extra work to ensure the audio file loaded is supported by the
browser. To do this it keeps a hash called
Q.audioMimeTypes
that maps file extensions to audio mime types.
