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45 lines
1.5 KiB
HTML
45 lines
1.5 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test whether we can create an AudioContext interface</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 class="testbody" type="text/javascript">
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SimpleTest.waitForExplicitFinish();
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addLoadEvent(function() {
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SpecialPowers.setBoolPref("media.webaudio.enabled", true);
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var context = new AudioContext();
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var buffer = context.createBuffer(2, 2048, context.sampleRate);
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SpecialPowers.gc(); // Make sure that our channels are accessible after GC
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ok(buffer, "Buffer was allocated successfully");
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is(buffer.sampleRate, context.sampleRate, "Correct sample rate");
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is(buffer.length, 2048, "Correct length");
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ok(Math.abs(buffer.duration - 2048 / context.sampleRate) < 0.0001, "Correct duration");
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is(buffer.numberOfChannels, 2, "Correct number of channels");
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for (var i = 0; i < buffer.numberOfChannels; ++i) {
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var buf = buffer.getChannelData(i);
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ok(buf, "Buffer index " + i + " exists");
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ok(buf instanceof Float32Array, "Result is a typed array");
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is(buf.length, buffer.length, "Correct length");
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var foundNonZero = false;
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for (var j = 0; j < buf.length; ++j) {
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if (buf[j] != 0) {
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foundNonZero = true;
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break;
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}
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}
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ok(!foundNonZero, "Buffer " + i + " should be initialized to 0");
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}
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SpecialPowers.clearUserPref("media.webaudio.enabled");
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SimpleTest.finish();
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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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