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<!doctype html>
<html>
<head>
<style>
body {
display: flex;
justify-content: center;
align-items: center;
flex-wrap: wrap;
flex-flow: column;
}
buttons {
justify-content: space-around;
}
</style>
</head>
<body>
<div id="buttons" >
<input value ="getDisplayMedia" onclick="getDisplayMedia(true, true);" type="button">
<input value = "chooseDesktopMedia" onclick="chooseDesktopMedia();" type="button">
<input value ="Stop" onclick="stop();" type="button">
</div>
<div id="content"></div>
</body>
<script>
const EXTENSION_ID = "nkeimhogjdpnpccoofpliimaahmaaome"; // hangout services extension
const content = document.getElementById("content");
const video = document.createElement("video");
video.setAttribute("width", 640);
video.setAttribute("height", 640);
video.setAttribute("style", "background-color: black;");
content.appendChild(video);
async function getDisplayMedia(v = true, a = true) {
stop();
navigator.mediaDevices.getDisplayMedia({ video: v, audio: a })
.then(stream => {
start(stream);
}, error => {
console.error(error);
});
}
function chooseDesktopMedia() {
stop();
// Connect to the 'chooseDesktopMedia' listener within the hangout services extension.
let port = chrome.runtime.connect(EXTENSION_ID, {name: "chooseDesktopMedia"})
// The 'chooseDesktopMedia' api returns a streamId that
// identifies a media source in the constraints of 'getUserMedia'
// (see chromeMediaSourceId)
port.onMessage.addListener(result => {
navigator.mediaDevices.getUserMedia({
video: {
mandatory: {
chromeMediaSource: "desktop",
chromeMediaSourceId: result.value.streamId
},
}
}).then(stream => {
start(stream);
}, error => {
console.error(error);
})
})
// Trigger the listener on the other side,
// we should see the picker dialog after this call.
port.postMessage({method: "chooseDesktopMedia"})
}
function stop() {
if (video.srcObject)
for (const track of video.srcObject.getTracks())
track.stop()
video.srcObject = null;
video.setAttribute("style", "background-color: black;");
}
function start(stream) {
video.srcObject = stream;
video.play();
}
</script>
</html>
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