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60 lines
1.4 KiB
HTML
60 lines
1.4 KiB
HTML
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<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test AnalyserNode when the input is scaled </title>
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<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<script type="text/javascript" src="webaudio.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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</head>
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<body>
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<pre id="test">
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<script class="testbody" type="text/javascript">
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SimpleTest.waitForExplicitFinish();
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addLoadEvent(function() {
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var context = new AudioContext();
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var gain = context.createGain();
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var analyser = context.createAnalyser();
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var osc = context.createOscillator();
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osc.connect(gain);
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gain.connect(analyser);
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osc.start();
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var array = new Uint8Array(analyser.frequencyBinCount);
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function getAnalyserData() {
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gain.gain.setValueAtTime(currentGain, context.currentTime);
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analyser.getByteTimeDomainData(array);
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var inrange = true;
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var max = -1;
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for (var i = 0; i < array.length; i++) {
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if (array[i] > max) {
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max = Math.abs(array[i] - 128);
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}
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}
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if (max <= currentGain * 128) {
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ok(true, "Analyser got scaled data for " + currentGain);
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currentGain = tests.shift();
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if (currentGain == undefined) {
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SimpleTest.finish();
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return;
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}
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}
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requestAnimationFrame(getAnalyserData);
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}
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var tests = [1.0, 0.5, 0.0];
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var currentGain = tests.shift();
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requestAnimationFrame(getAnalyserData);
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});
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</script>
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</pre>
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</body>
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</html>
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