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<head>
  <title>Distance effect of a PannerNode with the position set via AudioParams (Bug 1472550)</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="text/javascript" src="webaudio.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test">
<script class="testbody" type="text/javascript">
 SimpleTest.waitForExplicitFinish();
 var o = new OfflineAudioContext(2, 256, 44100);

 // We want a stereo constant source.
 var b = o.createBuffer(2, 1, 44100);
 b.getChannelData(0)[0] = 1;
 b.getChannelData(1)[0] = 1;
 var c = o.createBufferSource();
 c.buffer = b;
 c.loop = true;

 var p = o.createPanner();
 p.positionY.setValueAtTime(1, 0);
 p.positionX.setValueAtTime(1, 0);
 p.positionZ.setValueAtTime(1, 0);

 // Set the listener somewhere far
 o.listener.setPosition(20, 2, 20);

 c.start();
 c.connect(p).connect(o.destination);

 o.startRendering().then((ab) => {
   // Check that the distance attenuates the sound.
   ok(ab.getChannelData(0)[0] < 0.1, "left channel must be very quiet");
   ok(ab.getChannelData(1)[0] < 0.1, "right channel must be very quiet");
   SimpleTest.finish();
 });
</script>
</pre>
</body>
</html>
