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<!DOCTYPE HTML>
<html>
<head>
<title>Test ScriptProcessorNode playbackTime for bug 970773</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<pre id="test">
<script class="testbody" type="text/javascript">
SimpleTest.waitForExplicitFinish();
var context = new AudioContext();
const delay = 0.1;
function doTest() {
const processorBufferLength = 256;
// |currentTime| may include double precision floating point
// rounding errors, so round to nearest integer sample to ignore these.
var minimumPlaybackSample =
Math.round(context.currentTime * context.sampleRate) +
processorBufferLength;
var sp = context.createScriptProcessor(processorBufferLength);
sp.connect(context.destination);
sp.onaudioprocess =
function(e) {
is(e.inputBuffer.length, processorBufferLength,
"expected buffer length");
var playbackSample = Math.round(e.playbackTime * context.sampleRate)
ok(playbackSample >= minimumPlaybackSample,
"playbackSample " + playbackSample +
" beyond expected minimum " + minimumPlaybackSample);
sp.onaudioprocess = null;
SimpleTest.finish();
};
}
// Wait until AudioDestinationNode has accumulated enough 'extra' time so that
// a failure would be easily detected.
(function waitForExtraTime() {
if (context.currentTime < delay) {
SimpleTest.executeSoon(waitForExtraTime);
} else {
doTest();
}
})();
</script>
</pre>
</body>
</html>
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