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54 lines
2.1 KiB
HTML
54 lines
2.1 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>A disabled audio track is rendered as silence</title>
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<link rel="author" title="Dominique Hazael-Massieux" href="mailto:dom@w3.org"/>
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<link rel="help" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html#introduction">
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<link rel="help" href="http://dev.w3.org/2011/webrtc/editor/getusermedia.html#mediastreams-as-media-elements">
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</head>
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<body>
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<p class="instructions">When prompted, accept to share your audio stream.</p>
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<h1 class="instructions">Description</h1>
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<p class="instructions">This test checks that a disabled audio track in a
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MediaStream is rendered as silence. It relies on the
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<a href="https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html">
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Web Audio API</a>.</p>
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<div id='log'></div>
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<script src=/resources/testharness.js></script>
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<script src=/resources/testharnessreport.js></script>
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<script>
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var t = async_test("Tests that a disabled audio track in a MediaStream is rendered as silence");
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var aud = document.getElementById("aud");
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t.step(function() {
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navigator.mediaDevices.getUserMedia({audio: true}).then(t.step_func(function (stream) {
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var ctx = new AudioContext();
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var streamSource = ctx.createMediaStreamSource(stream);
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var silenceDetector = ctx.createScriptProcessor(1024);
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var count = 10;
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silenceDetector.onaudioprocess = t.step_func(function (e) {
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var buffer1 = e.inputBuffer.getChannelData(0);
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var buffer2 = e.inputBuffer.getChannelData(1);
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var out = e.outputBuffer.getChannelData(0);
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out = new Float32Array(buffer1);
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for (var i = 0; i < buffer1.length; i++) {
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assert_equals(buffer1[i], 0, "Audio buffer entry #" + i + " in channel 0 is silent");
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}
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for (var i = 0; i < buffer2.length; i++) {
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assert_equals(buffer2[i], 0, "Audio buffer entry #" + i + " in channel 1 is silent");
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}
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count--;
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if (count === 0) {
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silenceDetector.onaudioprocess = null;
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t.done();
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}
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});
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stream.getAudioTracks()[0].enabled = false;
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streamSource.connect(silenceDetector);
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silenceDetector.connect(ctx.destination);
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}), function(error) {});
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});
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</script>
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</body>
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</html>
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