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95 lines
2.8 KiB
HTML
95 lines
2.8 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test the PeriodicWave interface</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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// real and imag are used in separate PeriodicWaves to make their peak values
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// easy to determine.
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const realMax = 99;
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var real = new Float32Array(realMax + 1);
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real[1] = 2.0; // fundamental
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real[realMax] = 3.0;
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const realPeak = real[1] + real[realMax];
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const realFundamental = 19.0;
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var imag = new Float32Array(4);
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imag[0] = 6.0; // should be ignored.
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imag[3] = 0.5;
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const imagPeak = imag[3];
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const imagFundamental = 551.0;
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const testLength = 4096;
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addLoadEvent(function() {
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var ac = new AudioContext();
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ac.createPeriodicWave(new Float32Array(4096), new Float32Array(4096));
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expectException(function() {
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ac.createPeriodicWave(new Float32Array(512), imag);
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}, DOMException.NOT_SUPPORTED_ERR);
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expectException(function() {
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ac.createPeriodicWave(new Float32Array(0), new Float32Array(0));
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}, DOMException.NOT_SUPPORTED_ERR);
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expectNoException(function() {
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ac.createPeriodicWave(new Float32Array(4097), new Float32Array(4097));
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});
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runTest();
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});
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var gTest = {
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createGraph: function(context) {
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var merger = context.createChannelMerger();
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var osc0 = context.createOscillator();
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var osc1 = context.createOscillator();
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osc0.setPeriodicWave(context.
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createPeriodicWave(real,
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new Float32Array(real.length)));
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osc1.setPeriodicWave(context.
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createPeriodicWave(new Float32Array(imag.length),
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imag));
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osc0.frequency.value = realFundamental;
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osc1.frequency.value = imagFundamental;
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osc0.start();
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osc1.start();
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osc0.connect(merger, 0, 0);
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osc1.connect(merger, 0, 1);
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return merger;
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},
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createExpectedBuffers: function(context) {
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var buffer = context.createBuffer(2, testLength, context.sampleRate);
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for (var i = 0; i < buffer.length; ++i) {
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buffer.getChannelData(0)[i] = 1.0 / realPeak *
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(real[1] * Math.cos(2 * Math.PI * realFundamental * i /
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context.sampleRate) +
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real[realMax] * Math.cos(2 * Math.PI * realMax * realFundamental * i /
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context.sampleRate));
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buffer.getChannelData(1)[i] = 1.0 / imagPeak *
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imag[3] * Math.sin(2 * Math.PI * 3 * imagFundamental * i /
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context.sampleRate);
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}
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return buffer;
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},
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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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