Merge pull request #8213 from w3c/sync_44bc95443de17bda911f39671617a4c5d6c2e31c
Convert test_analyserScale.html to a web-platform-test: test-analyser-scale.html.
diff --git a/webaudio/the-audio-api/the-analysernode-interface/test-analyser-scale.html b/webaudio/the-audio-api/the-analysernode-interface/test-analyser-scale.html
new file mode 100644
index 0000000..04fe480
--- /dev/null
+++ b/webaudio/the-audio-api/the-analysernode-interface/test-analyser-scale.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<html>
+<head>
+ <meta charset="utf-8">
+ <title>Test AnalyserNode when the input is scaled</title>
+ <script src="/resources/testharness.js"></script>
+ <script src="/resources/testharnessreport.js"></script>
+ <script>
+ var context = new AudioContext();
+
+ var gain = context.createGain();
+ var analyser = context.createAnalyser();
+ var osc = context.createOscillator();
+
+ osc.connect(gain);
+ gain.connect(analyser);
+
+ osc.start();
+
+ var array = new Uint8Array(analyser.frequencyBinCount);
+
+ function getAnalyserData() {
+ gain.gain.setValueAtTime(currentGain, context.currentTime);
+ analyser.getByteTimeDomainData(array);
+ var inrange = true;
+ var max = -1;
+ for (var i = 0; i < array.length; i++) {
+ if (array[i] > max) {
+ max = Math.abs(array[i] - 128);
+ }
+ }
+ if (max <= currentGain * 128) {
+ assert_true(true, "Analyser got scaled data for " + currentGain);
+ currentGain = tests.shift();
+ if (currentGain == undefined) {
+ done();
+ return;
+ }
+ }
+ requestAnimationFrame(getAnalyserData);
+ }
+
+ var tests = [1.0, 0.5, 0.0];
+ var currentGain = tests.shift();
+ requestAnimationFrame(getAnalyserData);
+ </script>
+</head>
+</body>
+</html>
