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products/Sources/formale Sprachen/C/Firefox/dom/media/webaudio/test/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 6 kB

Quelle test_analyserNode.html Sprache: HTML

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

<!DOCTYPE HTML>
<html>
<head>
  <title>Test AnalyserNode</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="text/javascript" src="webaudio.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test">
<script class="testbody" type="text/javascript">

function testNode() {
  var context = new AudioContext();
  var buffer = context.createBuffer(1, 2048, context.sampleRate);
  for (var i = 0; i < 2048; ++i) {
    buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
  }

  var destination = context.destination;

  var source = context.createBufferSource();

  var analyser = context.createAnalyser();

  source.buffer = buffer;

  source.connect(analyser);
  analyser.connect(destination);

  is(analyser.channelCount, 2, "analyser node has 2 input channels by default");
  is(analyser.channelCountMode, "max", "Correct channelCountMode for the analyser node");
  is(analyser.channelInterpretation, "speakers", "Correct channelCountInterpretation for the analyser node");

  is(analyser.fftSize, 2048, "Correct default value for fftSize");
  is(analyser.frequencyBinCount, 1024, "Correct default value for frequencyBinCount");
  expectException(function() {
    analyser.fftSize = 0;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.fftSize = 1;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.fftSize = 8;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.fftSize = 100; // non-power of two
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.fftSize = 2049;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.fftSize = 4097;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.fftSize = 8193;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.fftSize = 16385;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.fftSize = 32769;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.fftSize = 65536;
  }, DOMException.INDEX_SIZE_ERR);
  analyser.fftSize = 1024;
  is(analyser.frequencyBinCount, 512, "Correct new value for frequencyBinCount");

  is(analyser.minDecibels, -100, "Correct default value for minDecibels");
  is(analyser.maxDecibels, -30, "Correct default value for maxDecibels");
  expectException(function() {
    analyser.minDecibels = -30;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.minDecibels = -29;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.maxDecibels = -100;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.maxDecibels = -101;
  }, DOMException.INDEX_SIZE_ERR);

  ok(Math.abs(analyser.smoothingTimeConstant - 0.8) < 0.001, "Correct default value for smoothingTimeConstant");
  expectException(function() {
    analyser.smoothingTimeConstant = -0.1;
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser.smoothingTimeConstant = 1.1;
  }, DOMException.INDEX_SIZE_ERR);
  analyser.smoothingTimeConstant = 0;
  analyser.smoothingTimeConstant = 1;
}

function testConstructor() {
  var context = new AudioContext();

  var analyser = new AnalyserNode(context);
  is(analyser.channelCount, 2, "analyser node has 2 input channels by default");
  is(analyser.channelCountMode, "max", "Correct channelCountMode for the analyser node");
  is(analyser.channelInterpretation, "speakers", "Correct channelCountInterpretation for the analyser node");

  is(analyser.fftSize, 2048, "Correct default value for fftSize");
  is(analyser.frequencyBinCount, 1024, "Correct default value for frequencyBinCount");
  is(analyser.minDecibels, -100, "Correct default value for minDecibels");
  is(analyser.maxDecibels, -30, "Correct default value for maxDecibels");
  ok(Math.abs(analyser.smoothingTimeConstant - 0.8) < 0.001, "Correct default value for smoothingTimeConstant");

  expectException(function() {
    analyser = new AnalyserNode(context, { fftSize: 0 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { fftSize: 1 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { fftSize: 8 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { fftSize: 100 }); // non-power of two
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { fftSize: 2049 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { fftSize: 4097 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { fftSize: 8193 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { fftSize: 16385 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { fftSize: 32769 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { fftSize: 65536 });
  }, DOMException.INDEX_SIZE_ERR);
  analyser = new AnalyserNode(context, { fftSize: 1024 });
  is(analyser.frequencyBinCount, 512, "Correct new value for frequencyBinCount");

  expectException(function() {
    analyser = new AnalyserNode(context, { minDecibels: -30 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { minDecibels: -29 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { maxDecibels: -100 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { maxDecibels: -101 });
  }, DOMException.INDEX_SIZE_ERR);

  expectException(function() {
    analyser = new AnalyserNode(context, { smoothingTimeConstant: -0.1 });
  }, DOMException.INDEX_SIZE_ERR);
  expectException(function() {
    analyser = new AnalyserNode(context, { smoothingTimeConstant: -1.1 });
  }, DOMException.INDEX_SIZE_ERR);
  analyser = new AnalyserNode(context, { smoothingTimeConstant: 0 });
  analyser = new AnalyserNode(context, { smoothingTimeConstant: 1 });
}

SimpleTest.waitForExplicitFinish();
addLoadEvent(function() {

  testNode();
  testConstructor();

  SimpleTest.finish();
});

</script>
</pre>
</body>
</html>

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