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products/Sources/formale Sprachen/C/Firefox/dom/media/test/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 3 kB

Quelle test_mediarecorder_record_timeslice.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/dom/media/test/test_mediarecorder_record_timeslice.html

<!DOCTYPE HTML>
<html>
<head>
  <title>Test MediaRecorder Record Timeslice</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>
<pre id="test">
<script class="testbody" type="text/javascript">
var manager = new MediaTestManager;

/**
* Starts a test on every media recorder file included to check that a stream
* derived from the file can be recorded with a timeslice provided
*/
function startTest(test, token) {
  var element = document.createElement('audio');
  var expectedMimeType = test.type;

  element.token = token;
  manager.started(token);

  element.src = test.name;
  element.test = test;
  element.preload = "auto";

  // Set up MediaRecorder once loadedmetadata fires and tracks are available.
  element.onloadedmetadata = function() {
    element.onloadedmetadata = null;

    const stream = element.mozCaptureStream();
    const mediaRecorder =
      new MediaRecorder(stream, {mimeType: expectedMimeType});

    mediaRecorder.onerror = function () {
      ok(false, 'Unexpected onerror callback fired');
    };

    mediaRecorder.onwarning = function () {
      ok(false, 'Unexpected onwarning callback fired');
    };

    mediaRecorder.onstop = function () {
      ok(false, 'Unexpected onstop callback fired');
    };

    var dataAvailableCount = 0;
    var onDataAvailableFirst = false;

    // This handler fires every 250ms to generate a blob.
    mediaRecorder.ondataavailable = function (evt) {
      info('ondataavailable fired');
      dataAvailableCount++;

      ok(evt instanceof BlobEvent,
         'Events fired from ondataavailable should be BlobEvent');
      is(evt.type, 'dataavailable',
         'Event type should dataavailable');
      ok(evt.data.size >= 0,
         'Blob data size received is greater than or equal to zero');

      is(evt.data.type, expectedMimeType,
         'Blob data received should have type = ' + expectedMimeType);
      is(mediaRecorder.mimeType, expectedMimeType,
         'Mime type in ondataavailable = ' + mediaRecorder.mimeType);

      // We'll stop recording upon the 1st blob being received
      if (dataAvailableCount === 1) {
        mediaRecorder.onstop = function () {
          info('onstop fired');

          if (!onDataAvailableFirst) {
            ok(false, 'onstop unexpectedly fired before ondataavailable');
          }
          element.pause();
          manager.finished(token);
        };

        mediaRecorder.stop();
        is(mediaRecorder.state, 'inactive',
           'Media recorder is inactive after being stopped');
        is(mediaRecorder.stream, stream,
           'Media recorder stream = element stream post recording');

      } else if (dataAvailableCount === 2) {
        // Ensure we've received at least two ondataavailable events before onstop
        onDataAvailableFirst = true;
      }
    };

    mediaRecorder.start(1);
    element.play();
    is(mediaRecorder.state, 'recording', 'Media recorder should be recording');
    is(mediaRecorder.stream, stream,
       'Media recorder stream = element stream at the start of recording');
  };
}

manager.runTests(gMediaRecorderTests, startTest);
</script>
</pre>
</body>
</html>

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