<!DOCTYPE HTML>
<html>
<meta charset=utf-8>
<head>
  <title>Test that we can decode multichannel file with webaudio and &lt;audio&gt;</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test">
<script class="testbody" type="text/javascript">
var testcases = [
  {
    filename: "audio-quad.wav",
    channels: 4
  },
  {
    filename: "8kHz-320kbps-6ch.aac",
    channels: 6
  }
];

SimpleTest.waitForExplicitFinish();

function decodeUsingAudioElement(filename, resolve) {
  var a = new Audio();
  a.addEventListener("error", function() {
    ok(false, "Error loading metadata");
    resolve();
  });
  a.addEventListener("loadedmetadata", function() {
    ok(true, "Metadata Loaded");
    resolve();
  });

  a.src = filename;
  a.load();
}

function testOne({filename, channels}) {
  return new Promise(resolve => {
    var xhr = new XMLHttpRequest();
    xhr.open("GET", filename);
    xhr.responseType = "arraybuffer";
    xhr.onload = function() {
      var context = new AudioContext();
      context.decodeAudioData(xhr.response, function(b) {
        ok(true, "Decoding of a wave file with four channels succeded.");
        is(b.numberOfChannels,
           channels,
           `The AudioBuffer decoded from ${filename} should have ${channels} channels.`);
        decodeUsingAudioElement(filename, resolve);
      }, function() {
        ok(false, `Decoding ${filename} failed)`);
        decodeUsingAudioElement(filename, resolve);
      });
    };
    xhr.send(null);
  });
}

async function runTest() {
  for (var testcase of testcases) {
    await testOne(testcase);
  }

  SimpleTest.finish();
}

addLoadEvent(runTest);

</script>
</pre>
</body>
</html>
