tor-browser

The Tor Browser
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test_getUserMedia_mediaElementCapture_audio.html (4494B)

      1 <!DOCTYPE HTML>
      2 <html>
      3 <head>
      4  <script type="application/javascript" src="mediaStreamPlayback.js"></script>
      5 </head>
      6 <body>
      7 <pre id="test">
      8 <script>
      9 
     10 createHTML({
     11  bug: "1259788",
     12  title: "Test CaptureStream audio content on HTMLMediaElement playing a gUM MediaStream",
     13  visible: true
     14 });
     15 
     16 var audioContext;
     17 var gUMAudioElement;
     18 var analyser;
     19 let tone;
     20 runTest(() => getUserMedia({audio: { echoCancellation: false }})
     21  .then(stream => {
     22    gUMAudioElement = createMediaElement("audio", "gUMAudio");
     23    gUMAudioElement.srcObject = stream;
     24 
     25    audioContext = new AudioContext();
     26    // Start a tone so that the gUM call will record something even with
     27    // --use-test-media-devices.
     28    tone = new LoopbackTone(audioContext, TEST_AUDIO_FREQ);
     29    tone.start();
     30 
     31    info("Capturing");
     32 
     33    analyser = new AudioStreamAnalyser(audioContext,
     34                                       gUMAudioElement.mozCaptureStream());
     35    analyser.enableDebugCanvas();
     36    return analyser.waitForAnalysisSuccess(array =>
     37      array[analyser.binIndexForFrequency(50)]              < 50 &&
     38      array[analyser.binIndexForFrequency(TEST_AUDIO_FREQ)] > 200 &&
     39      array[analyser.binIndexForFrequency(2500)]            < 50);
     40  })
     41  .then(() => {
     42    info("Audio flowing. Pausing.");
     43    gUMAudioElement.pause();
     44 
     45    return analyser.waitForAnalysisSuccess(array =>
     46      array[analyser.binIndexForFrequency(50)]              < 50 &&
     47      array[analyser.binIndexForFrequency(TEST_AUDIO_FREQ)] < 50 &&
     48      array[analyser.binIndexForFrequency(2500)]            < 50);
     49  })
     50  .then(() => {
     51    info("Audio stopped flowing. Playing.");
     52    gUMAudioElement.play();
     53 
     54    return analyser.waitForAnalysisSuccess(array =>
     55      array[analyser.binIndexForFrequency(50)]              < 50 &&
     56      array[analyser.binIndexForFrequency(TEST_AUDIO_FREQ)] > 200 &&
     57      array[analyser.binIndexForFrequency(2500)]            < 50);
     58  })
     59  .then(() => {
     60    info("Audio flowing. Removing source.");
     61    var stream = gUMAudioElement.srcObject;
     62    gUMAudioElement.srcObject = null;
     63 
     64    return analyser.waitForAnalysisSuccess(array =>
     65      array[analyser.binIndexForFrequency(50)]              < 50 &&
     66      array[analyser.binIndexForFrequency(TEST_AUDIO_FREQ)] < 50 &&
     67      array[analyser.binIndexForFrequency(2500)]            < 50)
     68        .then(() => stream);
     69  })
     70  .then(stream => {
     71    info("Audio stopped flowing. Setting source.");
     72    gUMAudioElement.srcObject = stream;
     73 
     74    return analyser.waitForAnalysisSuccess(array =>
     75      array[analyser.binIndexForFrequency(50)]              < 50 &&
     76      array[analyser.binIndexForFrequency(TEST_AUDIO_FREQ)] > 200 &&
     77      array[analyser.binIndexForFrequency(2500)]            < 50);
     78  })
     79  .then(() => {
     80    info("Audio flowing from new source. Adding a track.");
     81    let oscillator = audioContext.createOscillator();
     82    oscillator.type = 'sine';
     83    oscillator.frequency.value = 2000;
     84    oscillator.start();
     85 
     86    let oscOut = audioContext.createMediaStreamDestination();
     87    oscillator.connect(oscOut);
     88 
     89    gUMAudioElement.srcObject.addTrack(oscOut.stream.getTracks()[0]);
     90 
     91    return analyser.waitForAnalysisSuccess(array =>
     92      array[analyser.binIndexForFrequency(50)]              < 50 &&
     93      array[analyser.binIndexForFrequency(TEST_AUDIO_FREQ)] > 200 &&
     94      array[analyser.binIndexForFrequency(1500)]            < 50 &&
     95      array[analyser.binIndexForFrequency(2000)]            > 200 &&
     96      array[analyser.binIndexForFrequency(2500)]            < 50);
     97  })
     98  .then(() => {
     99    info("Audio flowing from new track. Removing a track.");
    100 
    101    const gUMTrack = gUMAudioElement.srcObject.getTracks()[0];
    102    gUMAudioElement.srcObject.removeTrack(gUMTrack);
    103 
    104    is(gUMAudioElement.srcObject.getTracks().length, 1,
    105       "A track should have been removed");
    106 
    107    return analyser.waitForAnalysisSuccess(array =>
    108      array[analyser.binIndexForFrequency(50)]              < 50 &&
    109      array[analyser.binIndexForFrequency(TEST_AUDIO_FREQ)] < 50 &&
    110      array[analyser.binIndexForFrequency(1500)]            < 50 &&
    111      array[analyser.binIndexForFrequency(2000)]            > 200 &&
    112      array[analyser.binIndexForFrequency(2500)]            < 50)
    113        .then(() => [gUMTrack, ...gUMAudioElement.srcObject.getTracks()]
    114            .forEach(t => t.stop()));
    115  })
    116  .then(() => ok(true, "Test passed."))
    117  .catch(e => ok(false, "Test failed: " + e + (e.stack ? "\n" + e.stack : "")))
    118  .finally(() => tone.stop()));
    119 
    120 </script>
    121 </pre>
    122 </body>
    123 </html>