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+<!DOCTYPE HTML>
+<html>
+<head>
+ <title>Test PeriodicWave disableNormalization Parameter</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">
+
+SimpleTest.waitForExplicitFinish();
+
+// We create PerodicWave instances containing two tones and compare it to
+// buffers created directly in JavaScript by adding the two waves together.
+// Two of the PeriodicWaves are normalized, the other is not. This test is
+// a modification of test_periodicWave.html.
+//
+// These constants are borrowed from test_periodicWave.html and modified
+// so that the realPeak (which is the normalization factor) will be small
+// enough that the errors are within the bounds for the test.
+const realMax = 99;
+var real = new Float32Array(realMax + 1);
+real[1] = 2.0; // fundamental
+real[realMax] = 0.25;
+
+const realPeak = real[1] + real[realMax];
+const realFundamental = 19.0;
+
+const testLength = 4096;
+
+addLoadEvent(function() {
+ runTest();
+});
+
+var gTest = {
+ createGraph(context) {
+ var merger = context.createChannelMerger();
+
+ var osc0 = context.createOscillator();
+ var osc1 = context.createOscillator();
+ var osc2 = context.createOscillator();
+
+ osc0.setPeriodicWave(context.
+ createPeriodicWave(real,
+ new Float32Array(real.length),
+ {disableNormalization: false}));
+ osc1.setPeriodicWave(context.
+ createPeriodicWave(real,
+ new Float32Array(real.length)));
+ osc2.setPeriodicWave(context.
+ createPeriodicWave(real,
+ new Float32Array(real.length),
+ {disableNormalization: true}));
+
+ osc0.frequency.value = realFundamental;
+ osc1.frequency.value = realFundamental;
+ osc2.frequency.value = realFundamental;
+
+ osc0.start();
+ osc1.start();
+ osc2.start();
+
+ osc0.connect(merger, 0, 0);
+ osc1.connect(merger, 0, 1);
+ osc2.connect(merger, 0, 2);
+
+ return merger;
+ },
+ createExpectedBuffers(context) {
+ var buffer = context.createBuffer(3, testLength, context.sampleRate);
+
+ for (var i = 0; i < buffer.length; ++i) {
+
+ buffer.getChannelData(0)[i] = 1.0 / realPeak *
+ (real[1] * Math.cos(2 * Math.PI * realFundamental * i /
+ context.sampleRate) +
+ real[realMax] * Math.cos(2 * Math.PI * realMax * realFundamental * i /
+ context.sampleRate));
+
+ buffer.getChannelData(1)[i] = buffer.getChannelData(0)[i];
+
+ buffer.getChannelData(2)[i] =
+ (real[1] * Math.cos(2 * Math.PI * realFundamental * i /
+ context.sampleRate) +
+ real[realMax] * Math.cos(2 * Math.PI * realMax * realFundamental * i /
+ context.sampleRate));
+ }
+ return buffer;
+ },
+ 'numberOfChannels': 3,
+};
+
+</script>
+</pre>
+</body>
+</html>