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87 lines
2.9 KiB
HTML
87 lines
2.9 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test BiquadFilterNode</title>
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<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.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 src="webaudio.js" type="text/javascript"></script>
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<script class="testbody" type="text/javascript">
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function near(a, b, msg) {
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ok(Math.abs(a - b) < 1e-3, msg);
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}
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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 buffer = context.createBuffer(1, 2048, context.sampleRate);
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for (var i = 0; i < 2048; ++i) {
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buffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * i / context.sampleRate);
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}
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var destination = context.destination;
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var source = context.createBufferSource();
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var filter = context.createBiquadFilter();
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source.buffer = buffer;
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source.connect(filter);
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filter.connect(destination);
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// Verify default values
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is(filter.type, "lowpass", "Correct default value for type");
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near(filter.frequency.defaultValue, 350, "Correct default value for filter frequency");
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near(filter.detune.defaultValue, 0, "Correct default value for filter detune");
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near(filter.Q.defaultValue, 1, "Correct default value for filter Q");
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near(filter.gain.defaultValue, 0, "Correct default value for filter gain");
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is(filter.channelCount, 2, "Biquad filter node has 2 input channels by default");
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is(filter.channelCountMode, "max", "Correct channelCountMode for the biquad filter node");
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is(filter.channelInterpretation, "speakers", "Correct channelCountInterpretation for the biquad filter node");
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// Make sure that we can set all of the valid type values
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var types = [
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"lowpass",
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"highpass",
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"bandpass",
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"lowshelf",
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"highshelf",
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"peaking",
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"notch",
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"allpass",
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];
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for (var i = 0; i < types.length; ++i) {
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filter.type = types[i];
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}
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// Make sure getFrequencyResponse handles invalid frequencies properly
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var frequencies = new Float32Array([-1.0, context.sampleRate*0.5 - 1.0, context.sampleRate]);
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var magResults = new Float32Array(3);
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var phaseResults = new Float32Array(3);
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filter.getFrequencyResponse(frequencies, magResults, phaseResults);
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ok(isNaN(magResults[0]), "Invalid input frequency should give NaN magnitude response");
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ok(!isNaN(magResults[1]), "Valid input frequency should not give NaN magnitude response");
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ok(isNaN(magResults[2]), "Invalid input frequency should give NaN magnitude response");
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ok(isNaN(phaseResults[0]), "Invalid input frquency should give NaN phase response");
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ok(!isNaN(phaseResults[1]), "Valid input frquency should not give NaN phase response");
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ok(isNaN(phaseResults[2]), "Invalid input frquency should give NaN phase response");
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source.start(0);
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SimpleTest.executeSoon(function() {
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source.stop(0);
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source.disconnect();
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filter.disconnect();
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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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