зеркало из https://github.com/mozilla/gecko-dev.git
47 строки
1.2 KiB
HTML
47 строки
1.2 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test WaveShaperNode with no curve</title>
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<script 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 OfflineAudioContext(1, 2048, 44100);
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var osc=context.createOscillator();
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var gain=context.createGain();
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var shaper=context.createWaveShaper();
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gain.gain.value=0.1;
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shaper.curve=new Float32Array([-0.5,-0.5,1,1]);
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osc.connect(gain);
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gain.connect(shaper);
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shaper.connect(context.destination);
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osc.start(0);
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context.startRendering().then(function(buffer) {
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var samples = buffer.getChannelData(0);
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// the signal should be scaled
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var failures = 0;
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for (var i = 0; i < 2048; ++i) {
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if (samples[i] > 0.5) {
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failures = failures + 1;
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}
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}
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ok(failures == 0, "signal should have been rescaled by gain: found " + failures + " points too loud.");
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SimpleTest.finish();
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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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