(function(){(function(){This class has the same methods as Luv.Audio.Sound, but they do nothing; they don't play or try to load any sounds.
Browsers which don't support the <audio> tag will instantiate this class instead
of Luv.Audio.Sound.
Luv.Audio.NullSound = Luv.Class('Luv.Audio.NullSound');Implement all the methods of Luv.Audio.Sound, but just return 0 instead of doing anything.
var fakeMethods = {},
fakeMethod = function() { return 0; };
for(var name in Luv.Audio.Sound.methods) {
if(Luv.Audio.Sound.methods.hasOwnProperty(name)) {
fakeMethods[name] = fakeMethod;
}
}
Luv.Audio.NullSound.include(fakeMethods, {play is the only method that does something in a NullSound (it still does very little)
It returns a SoundInstance whose internal element is a "fake" audio tag (in reality, a plain js object).
This makes it interface-compatible with Luv.Audio.Sound, but with no side effects,
since the sound instances it produces do nothing.
play: function() {
return Luv.Audio.SoundInstance(FakeAudioElement());
}
});
var FakeAudioElement = function() {
return {
volume: 1,
playbackRate: 1,
loop: undefined,
currentTime: 0,
play: function(){},
pause: function(){},
addEventListener: function(ignored, f) { f(); }
};
};
})();