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Test Info: Warnings
- This test has a WPT meta file that disables it given conditions:
- This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-mediaelementaudiosourcenode-interface/no-cors.https.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<title>
Test if MediaElementAudioSourceNode works for cross-origin redirects with
"no-cors" request mode.
</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/webaudio/resources/audit.js"></script>
<script src="/common/get-host-info.sub.js"></script>
</head>
<body>
<script id="layout-test-code">
const audit = Audit.createTaskRunner();
setup(() => {
const context = new AudioContext();
context.suspend();
const host_info = get_host_info();
const audioElement = document.createElement('audio');
audioElement.loop = true;
const wav =
host_info.HTTPS_ORIGIN + '/webaudio/resources/4ch-440.wav?' +
'pipe=header(access-control-allow-origin,*)';
audioElement.src =
host_info.HTTPS_REMOTE_ORIGIN +
'/fetch/api/resources/redirect.py?location=' +
encodeURIComponent(wav);
let source;
let workletRecorder;
audit.define(
{label: 'setting-up-graph'},
(task, should) => {
source = new MediaElementAudioSourceNode(context, {
mediaElement: audioElement
});
workletRecorder = new AudioWorkletNode(
context, 'recorder-processor', {channelCount: 4});
source.connect(workletRecorder).connect(context.destination);
task.done();
});
// The recorded data from MESN must be non-zero. The source file contains
// 4 channels of sine wave.
audit.define(
{label: 'start-playback-and-capture'},
(task, should) => {
workletRecorder.port.onmessage = (event) => {
if (event.data.type === 'recordfinished') {
for (let i = 0; i < event.data.recordBuffer.length; ++i) {
const channelData = event.data.recordBuffer[i];
should(channelData, `Recorded channel #${i}`)
.beConstantValueOf(0);
}
}
task.done();
};
context.resume();
audioElement.play();
});
Promise.all([
context.audioWorklet.addModule('/webaudio/js/worklet-recorder.js')
]).then(() => {
audit.run();
});
});
</script>
</body>
</html>