<!DOCTYPE HTML> <html> <head> <title>Audio-playback should be inactive when web-audio is silent</title> <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> </head> <body> <script type="application/javascript;version=1.7"> SimpleTest.waitForExplicitFinish(); var generator = runTest(); var expectedPlaybackActive = null; var expectedPlaying = null; var ac = new AudioContext(); var audibleDuration = 3; var observerService = SpecialPowers.Cc["@mozilla.org/observer-service;1"] .getService(SpecialPowers.Ci.nsIObserverService); var observer = { observe: function(subject, topic, data) { is(topic, "audio-playback", "audio-playback received"); is(data, expectedPlaybackActive, "Corrrect audible state"); is(ac.state, expectedPlaying, "Corrrect playing state"); continueTest(); } }; function continueTest() { try { generator.next(); } catch (e if e instanceof StopIteration) { error("Stop test because of exception!"); } } function playOscillatorNode() { var dest = ac.destination; var osc = ac.createOscillator(); osc.connect(dest); osc.start(0); osc.stop(ac.currentTime + audibleDuration); } function audioPlayingStart() { observerService.addObserver(observer, "audio-playback", false); ok(true, "Observer set"); expectedPlaybackActive = 'active'; expectedPlaying = "running"; info("Audio playing start"); playOscillatorNode(); } function audioBecomeSilentDuringPlaying() { info("Audio would become silent during playing"); expectedPlaybackActive = 'inactive-pause'; expectedPlaying = "running"; } function finish() { observerService.removeObserver(observer, "audio-playback"); ok(true, "Observer removed"); SimpleTest.finish(); } function startAudioContext() { if (ac.state != "running") { ac.resume(); ac.onstatechange = function() { if (ac.state == "running") { ok(true, "AudioContext starts running!"); ac.onstatechange = null; continueTest(); } } } else { ok(true, "AudioContext is running!"); continueTest(); } } function runTest() { yield startAudioContext(); yield audioPlayingStart(); yield audioBecomeSilentDuringPlaying(); yield finish(); } continueTest(); </script> </body> </html>