1 files changed, 59 insertions, 0 deletions
diff --git a/testing/web-platform/tests/mediacapture-streams/MediaStreamTrack-MediaElement-disabled-audio-is-silence.https.html b/testing/web-platform/tests/mediacapture-streams/MediaStreamTrack-MediaElement-disabled-audio-is-silence.https.html
new file mode 100644
index 0000000000..4ad2340ed5
--- /dev/null
+++ b/testing/web-platform/tests/mediacapture-streams/MediaStreamTrack-MediaElement-disabled-audio-is-silence.https.html
@@ -0,0 +1,59 @@
+<!doctype html>
+<html>
+<head>
+<title>A disabled audio track is rendered as silence</title>
+<link rel="author" title="Dominique Hazael-Massieux" href="mailto:dom@w3.org"/>
+<link rel="help" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html#introduction">
+<link rel="help" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html#mediastreams-as-media-elements">
+</head>
+<body>
+<p class="instructions">When prompted, accept to share your audio stream.</p>
+<h1 class="instructions">Description</h1>
+<p class="instructions">This test checks that a disabled audio track in a
+MediaStream is rendered as silence. It relies on the
+<a href="https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html">
+Web Audio API</a>.</p>
+
+<div id='log'></div>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=/resources/testdriver.js></script>
+<script src=/resources/testdriver-vendor.js></script>
+<script src=permission-helper.js></script>
+<script>
+const aud = document.getElementById("aud");
+promise_test(async t => {
+  await setMediaPermission("granted", ["microphone"]);
+  const stream = await navigator.mediaDevices.getUserMedia({audio: true});
+  var ctx = new AudioContext();
+  var streamSource = ctx.createMediaStreamSource(stream);
+  var silenceDetector = ctx.createScriptProcessor(1024);
+  var count = 10;
+  let resolveAudioProcessPromise;
+  const audioProcessed = new Promise(res => resolveAudioProcessPromise = res)
+
+  silenceDetector.onaudioprocess = function (e) {
+    var buffer1 = e.inputBuffer.getChannelData(0);
+    var buffer2 = e.inputBuffer.getChannelData(1);
+    var out = e.outputBuffer.getChannelData(0);
+    out = new Float32Array(buffer1);
+    for (var i = 0; i < buffer1.length; i++) {
+      assert_equals(buffer1[i], 0, "Audio buffer entry #" + i + " in channel 0 is silent");
+    }
+    for (var i = 0; i < buffer2.length; i++) {
+      assert_equals(buffer2[i], 0, "Audio buffer entry #" + i + " in channel 1 is silent");
+    }
+    count--;
+    if (count === 0) {
+      silenceDetector.onaudioprocess = null;
+      resolveAudioProcessPromise();
+    }
+  };
+  stream.getAudioTracks()[0].enabled = false;
+
+  streamSource.connect(silenceDetector);
+  silenceDetector.connect(ctx.destination);
+}, "Tests that a disabled audio track in a MediaStream is rendered as silence");
+</script>
+</body>
+</html>