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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/media/webaudio/test/test_bug964376.html
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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diff --git a/dom/media/webaudio/test/test_bug964376.html b/dom/media/webaudio/test/test_bug964376.html
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+<!DOCTYPE HTML>
+<html>
+<head>
+ <title>Test repeating audio is not distorted</title>
+ <script type="text/javascript" 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">
+
+function gcd(a, b) {
+ if (b === 0) {
+ return a;
+ }
+ return gcd(b, a % b);
+}
+
+var SAMPLE_PLACEMENT = 128;
+
+var gTest = {
+ length: 2048,
+ numberOfChannels: 1,
+
+ createGraph: function(context) {
+ var freq = Math.round(context.sampleRate / SAMPLE_PLACEMENT);
+ var dur = context.sampleRate / gcd(freq, context.sampleRate);
+ var buffer = context.createBuffer(1, dur, context.sampleRate);
+
+ for (var i = 0; i < context.sampleRate; ++i) {
+ buffer.getChannelData(0)[i] = Math.sin(freq * 2 * Math.PI * i / context.sampleRate);
+ }
+
+ var source = context.createBufferSource();
+ source.buffer = buffer;
+ source.loop = true;
+ source.playbackRate.setValueAtTime(0.5, SAMPLE_PLACEMENT / context.sampleRate);
+ source.start(0);
+
+ return source;
+ },
+
+ createExpectedBuffers: function(context) {
+ var freq = Math.round(context.sampleRate / SAMPLE_PLACEMENT);
+ var expectedBuffer = context.createBuffer(1, 2048, context.sampleRate);
+ var c = expectedBuffer.getChannelData(0);
+ for (var i = 0; i < c.length; ++i) {
+ if (i < SAMPLE_PLACEMENT) {
+ c[i] = Math.sin(freq * 2 * Math.PI * i / context.sampleRate);
+ } else {
+ c[i] = Math.sin(freq / 2 * 2 * Math.PI * (i + SAMPLE_PLACEMENT) / context.sampleRate);
+ }
+ }
+
+ return expectedBuffer;
+ },
+};
+
+runTest();
+</script>
+</pre>
+</body>
+</html>