mirror of
https://github.com/servo/servo.git
synced 2025-07-02 04:53:39 +01:00
42 lines
1.1 KiB
HTML
42 lines
1.1 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<title>Test AnalyserNode when the input is silent</title>
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
<script>
|
|
|
|
var ac = new AudioContext();
|
|
var analyser = ac.createAnalyser();
|
|
var constant = ac.createConstantSource();
|
|
var sp = ac.createScriptProcessor(2048, 1, 0);
|
|
|
|
constant.offset.value = 0.0;
|
|
|
|
constant.connect(analyser).connect(ac.destination);
|
|
|
|
constant.connect(sp);
|
|
|
|
var buf = new Float32Array(analyser.frequencyBinCount);
|
|
var iteration_count = 10;
|
|
sp.onaudioprocess = function() {
|
|
analyser.getFloatFrequencyData(buf);
|
|
var correct = true;
|
|
for (var i = 0; i < buf.length; i++) {
|
|
correct &= buf[i] == -Infinity;
|
|
}
|
|
assert_true(!!correct, "silent input process -Infinity in decibel bins");
|
|
if (!iteration_count--) {
|
|
sp.onaudioprocess = null;
|
|
constant.stop();
|
|
ac.close();
|
|
done();
|
|
}
|
|
};
|
|
|
|
constant.start();
|
|
</script>
|
|
</head>
|
|
</body>
|
|
</html>
|