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<!DOCTYPE HTML>
<html>
<head>
<title>Test buffers do not interfere when scheduled in sequence</title>
<script 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">
var OFFSETS = [0.005, 0.01, 0.02, 0.03];
var LENGTH = 128;
var gTest = {
length: 128 * OFFSETS.length,
numberOfChannels: 1,
createGraph(context) {
var gain = context.createGain();
// create a repeating sample
var repeatingSample = context.createBuffer(1, 2, context.sampleRate);
var c = repeatingSample.getChannelData(0);
for (var i = 0; i < repeatingSample.length; ++i) {
c[i] = i % 2 == 0 ? 1 : -1;
}
OFFSETS.forEach(function (offset, offsetIdx) {
// Schedule a set of nodes to repeat the sample.
for (var i = 0; i < LENGTH; i += repeatingSample.length) {
var source = context.createBufferSource();
source.buffer = repeatingSample;
source.connect(gain);
source.start((offsetIdx * LENGTH + i + offset) / context.sampleRate);
}
buffer = context.createBuffer(1, LENGTH, context.sampleRate);
c = buffer.getChannelData(0);
for (var i = 0; i < buffer.length; ++i) {
c[i] = i % 2 == 0 ? -1 : 1;
}
var source = context.createBufferSource();
source.buffer = buffer;
source.connect(gain);
source.start((offsetIdx * LENGTH + offset) / context.sampleRate);
});
return gain;
},
createExpectedBuffers(context) {
return context.createBuffer(1, gTest.length, context.sampleRate);
},
};
runTest();
</script>
</pre>
</body>
</html>