68 lines
1.6 KiB
JavaScript
68 lines
1.6 KiB
JavaScript
// Sounds module, used for emitting those annoying bl-up sounds when receiving a message
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define('sound',{requires: ['queue']}, function (requires) {
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var exports = { messages: {} },
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queue = requires.queue,
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ac = new (window.AudioContext || window.webkitAudioContext || false);
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// Recursive function for playing tones, takes an array of [tone,start_ms,duration_ms] - entries
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// i is only used for recursion
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exports.playTones = function (tones, i) {
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// Parameter defaults
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i = (i === undefined) ? 0 : i;
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// Stop if we've reached the end of iteration, and require ac
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if( !(i < Object.keys(tones).length) || !ac ) return;
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// Add tones to execution queue
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var current_tones = tones[i],
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freqs = current_tones[0],
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start = current_tones[1],
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duration = current_tones[2];
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var o = ac.createOscillator();
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var g = ac.createGain();
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o.frequency.value = freqs;
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o.connect(g);
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g.gain.value = 0.25;
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g.connect(ac.destination);
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queue.add_function_delayed(start,function() { o.noteOn(0); });
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queue.add_function_delayed(start+duration,function() { o.noteOff(0); });
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// Iterate, or start playing
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i++;
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if( i < Object.keys(tones).length ) {
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exports.playTones(tones,i);
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} else {
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queue.run();
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}
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};
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exports.messages = {
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message: [
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[261.63*2,0,50],
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[261.63*3,0,50],
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[261.63*4,50,50],
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[261.63*5,50,50]
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],
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person_joined: [
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[261.63*3,0,200],
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[261.63*1,0,200],
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[261.63*3,200,500],
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[261.63*2,200,500]
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],
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person_left: [
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[261.63*3,0,200],
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[261.63*2,0,200],
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[261.63*3,200,500],
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[261.63*1,200,500]
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]
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};
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return exports;
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}); |