LayoutTests/webaudio/oscillator-basic.html

   1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
   2
   3 <!--
   4 Create an oscillator of each type and verify that the type is set correctly.
   5 -->
   6 <html>
   7 <head>
   8 <link rel="stylesheet" href="../fast/js/resources/js-test-style.css"/>
   9 <script type="text/javascript" src="resources/audio-testing.js"></script>
  10 <script type="text/javascript" src="../fast/js/resources/js-test-pre.js"></script>
  11 </head>
  12
  13 <body>
  14 <div id="description"></div>
  15 <div id="console"></div>
  16
  17 <script>
  18 description("Basic test of setting Oscillator node types.");
  19
  20 var sampleRate = 44100;
  21 var renderLengthSeconds = 0.25;
  22
  23 var oscTypes = [{type: 0, name: "SINE"},
  24                 {type: 1, name: "SQUARE"},
  25                 {type: 2, name: "SAWTOOTH"},
  26                 {type: 3, name: "TRIANGLE"},
  27                 {type: 4, name: "CUSTOM"}];
  28
  29 function runTest()
  30 {
  31     if (window.testRunner) {
  32         testRunner.dumpAsText();
  33         testRunner.waitUntilDone();
  34     }
  35
  36     window.jsTestIsAsync = true;
  37
  38     // Create offline audio context.
  39     var context = new webkitAudioContext(2, sampleRate * renderLengthSeconds, sampleRate);
  40     var osc = context.createOscillator();
  41
  42     // Set each possible oscillator type (except CUSTOM) and verify that the type is correct.
  43     for (var k = 0; k < oscTypes.length - 1; ++k) {
  44         osc.type = oscTypes[k].type
  45         if (osc.type == oscTypes[k].type)
  46             testPassed("Oscillator correctly set to " + oscTypes[k].name + " type.");
  47         else
  48             testFailed("Oscillator set to " + oscTypes[k].name + " type, but returns " + oscTypes[osc.type].name + " type.");
  49     }
  50
  51     // Now set a custom oscillator
  52     var coeffA = new Float32Array([0, 1, 0.5]);
  53     var coeffB = new Float32Array([0, 0, 0]);
  54     var wavetable = context.createWaveTable(coeffA, coeffB);
  55     osc.setWaveTable(wavetable);
  56     if (osc.type == osc.CUSTOM)
  57         testPassed("Oscillator correctly set to CUSTOM type.");
  58     else
  59         testFailed("Oscillator set to CUSTOM type, but returns " + oscTypes[osc.type].name + " type.");
  60
  61     finishJSTest();
  62 }
  63
  64 runTest();
  65 successfullyParsed = true;
  66
  67 </script>
  68
  69 <script src="../fast/js/resources/js-test-post.js"></script>
  70
  71 </body>
  72 </html>