test_mediarecorder_record_4ch_audiocontext.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Test MediaRecorder Record AudioContext with four channels</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

  <script type="text/javascript" src="manifest.js"></script>

</head>

<body>

<script class="testbody" type="text/javascript">

function startTest() {

  var context = new AudioContext();

  var buffer = context.createBuffer(4, 80920, context.sampleRate);

  for (var i = 0; i < 80920; ++i) {

    for(var j = 0; j < 4; ++j) {

      buffer.getChannelData(j)[i] = Math.sin(1000 * 2 * Math.PI * i / context.sampleRate);

  var source = context.createBufferSource();

  source.buffer = buffer;

  source.loop = true;

  var dest = context.createMediaStreamDestination();

  var stopTriggered = false;

  var onstopTriggered = false;

  dest.channelCount = 4;

  var expectedMimeType = 'audio/ogg; codecs=opus';

  source.channelCountMode = 'explicit';

  source.connect(dest);

  var elem = document.createElement('audio');

  elem.srcObject = dest.stream;

  source.start(0);

  elem.play();

  let mMediaRecorder = new MediaRecorder(dest.stream);

  mMediaRecorder.onwarning = function() {

    ok(false, 'onwarning unexpectedly fired');

};

  mMediaRecorder.onerror = function() {

    ok(false, 'onerror unexpectedly fired');

};

  mMediaRecorder.onstop = function() {

    ok(true, 'onstop fired successfully');

    is(mMediaRecorder.state, 'inactive', 'check recording status is inactive');

    onstopTriggered = true;

    SimpleTest.finish();

};

  mMediaRecorder.ondataavailable = function (e) {

    ok(e.data.size > 0, 'check blob has data');

    is(e.data.type, expectedMimeType, 'blob should have expected mimetype');

    if (!stopTriggered) {

      is(mMediaRecorder.mimeType, expectedMimeType, 'recorder should have expected mimetype');

      mMediaRecorder.stop();

      is(mMediaRecorder.mimeType, '', 'recorder should have reset its mimetype');

      stopTriggered = true;

    } else if (onstopTriggered) {

      ok(false, 'ondataavailable should come before onstop event');

};

  try {

    mMediaRecorder.start(1000);

    is('recording', mMediaRecorder.state, "check record state recording");

  } catch (e) {

    ok(false, 'Can t record audio context');

startTest();

SimpleTest.waitForExplicitFinish();

</script>

</pre>

</body>

</html>