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<meta charset="utf-8">
<head>
  <title>Test MediaElementAudioSourceNode with passthrough</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
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<pre id="test">
<script class="testbody" type="text/javascript">
SimpleTest.waitForExplicitFinish();

function test() {
  var audio = new Audio("small-shot.ogg");
  var context = new AudioContext();
  var node = context.createMediaElementSource(audio);
  var sp = context.createScriptProcessor(2048, 1);
  node.connect(sp);
  var nonzeroSampleCount = 0;
  var complete = false;
  var iterationCount = 0;

  var srcWrapped = SpecialPowers.wrap(node);
  ok("passThrough" in srcWrapped, "MediaElementAudioSourceNode should support the passThrough API");
  srcWrapped.passThrough = true;

  // This test ensures we receive at least expectedSampleCount nonzero samples
  function processSamples(e) {
    if (complete) {
      return;
    }

    if (iterationCount == 0) {
      // Don't start playing the audio until the AudioContext stuff is connected
      // and running.
      audio.play();
    }
    ++iterationCount;

    var buf = e.inputBuffer.getChannelData(0);
    var nonzeroSamplesThisBuffer = 0;
    for (var i = 0; i < buf.length; ++i) {
      if (buf[i] != 0) {
        ++nonzeroSamplesThisBuffer;
      }
    }
    nonzeroSampleCount += nonzeroSamplesThisBuffer;
    if (iterationCount == 10) {
      is(nonzeroSampleCount, 0, "The input must be silence");
      SimpleTest.finish();
      complete = true;
    }
  }

  audio.oncanplaythrough = function() {
    sp.onaudioprocess = processSamples;
  };
}

SpecialPowers.pushPrefEnv({"set": [["media.preload.default", 2], ["media.preload.auto", 3]]}, test);

</script>
</pre>
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