third_party/WebKit/LayoutTests/webaudio/delaynode.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 attribute and basic functionality of Delay.");
  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     window.delay = delay;
  37     shouldBeTrue("delay.numberOfInputs === 1");
  38     shouldBeTrue("delay.numberOfOutputs === 1");
  39     shouldBeTrue("delay.delayTime.defaultValue === 0.0");
  40     shouldBeTrue("delay.delayTime.value === 0.0");
  41
  42     delay.delayTime.value = delayTimeSeconds;
  43     shouldBeTrue("delay.delayTime.value === 0.5");
  44
  45     bufferSource.connect(delay);
  46     delay.connect(context.destination);
  47     bufferSource.start(0);
  48
  49     context.oncomplete = checkDelayedResult(toneBuffer);
  50     context.startRendering();
  51 }
  52
  53 runTest();
  54
  55 </script>
  56
  57 </body>
  58 </html>