third_party/WebKit/LayoutTests/webaudio/delaynode-scheduling.html

   1 <!DOCTYPE html>
   2
   3 <html>
   4 <head>
   5 <script src="../resources/js-test.js"></script>
   6 <script src="resources/compatibility.js"></script>
   7 <script src="resources/audio-testing.js"></script>
   8 <script src="resources/delay-testing.js"></script>
   9 </head>
  10
  11 <body>
  12
  13 <div id="description"></div>
  14 <div id="console"></div>
  15
  16 <script>
  17 description("Tests that DelayNode delayTime parameter can be scheduled at a given time.");
  18
  19 function runTest() {
  20     if (window.testRunner) {
  21         testRunner.dumpAsText();
  22         testRunner.waitUntilDone();
  23     }
  24
  25     window.jsTestIsAsync = true;
  26
  27     // Create offline audio context.
  28     var context = new OfflineAudioContext(1, sampleRate * renderLengthSeconds, sampleRate);
  29     var toneBuffer = createToneBuffer(context, 20, 20 * toneLengthSeconds, sampleRate); // 20Hz tone
  30
  31     var bufferSource = context.createBufferSource();
  32     bufferSource.buffer = toneBuffer;
  33
  34     var delay = context.createDelay();
  35
  36     // Schedule delay time at time zero.
  37     delay.delayTime.setValueAtTime(delayTimeSeconds, 0);
  38
  39     bufferSource.connect(delay);
  40     delay.connect(context.destination);
  41     bufferSource.start(0);
  42
  43     context.oncomplete = checkDelayedResult(toneBuffer);
  44     context.startRendering();
  45 }
  46
  47 runTest();
  48
  49 </script>
  50
  51 </body>
  52 </html>