content/test/data/gpu/wgc_desktop_capture_texture.html

<!DOCTYPE HTML>
<html>
<head>
<title>WGC Desktop Capture Texture test: screen capture delivers texture frames</title>
</head>
<body>
<div id="container">
    <video id="localVideo" playsinline autoplay muted></video>
    <video id="remoteVideo" playsinline autoplay></video>
</div>

<script>
'use strict';

let startTime;
const localVideo = document.getElementById('localVideo');
const remoteVideo = document.getElementById('remoteVideo');
let renderedFramesCount;

let localStream;
let pc1;
let pc2;
const offerOptions = {
  offerToReceiveVideo: 1
};

function logOutput(s) {
  if (window.domAutomationController) {
    window.domAutomationController.log(s);
  } else {
    console.log(s);
  }
}

function sendResult(status) {
  if (window.domAutomationController) {
    window.domAutomationController.send(status);
  } else {
    console.log(status);
  }
}

function getName(pc) {
  return (pc === pc1) ? 'pc1' : 'pc2';
}

function getOtherPc(pc) {
  return (pc === pc1) ? pc2 : pc1;
}

async function start() {
  logOutput('Requesting display stream');
  try {
    const stream = await navigator.mediaDevices.getDisplayMedia(
        {video: true, audio: false});
    logOutput('Received display stream');
    localVideo.srcObject = stream;
    localStream = stream;
  } catch (e) {
    sendResult('FAILED');
    logOutput(`getDisplayMedia() error: ${e.name}`);
  }
}

async function call() {
  logOutput('Starting call');
  startTime = window.performance.now();
  const videoTracks = localStream.getVideoTracks();
  if (videoTracks.length > 0) {
    logOutput(`Using video device: ${videoTracks[0].label}`);
  }
  const configuration = {};
  pc1 = new RTCPeerConnection(configuration);
  pc1.addEventListener('icecandidate', e => onIceCandidate(pc1, e));
  pc2 = new RTCPeerConnection(configuration);
  pc2.addEventListener('icecandidate', e => onIceCandidate(pc2, e));
  pc2.addEventListener('track', gotRemoteStream);

  localStream.getTracks().forEach(track => pc1.addTrack(track, localStream));

  try {
    const offer = await pc1.createOffer(offerOptions);
    await onCreateOfferSuccess(offer);
  } catch (e) {
    onCreateSessionDescriptionError(e);
  }
}

function onCreateSessionDescriptionError(error) {
  sendResult('FAILED');
  logOutput(`Failed to create session description: ${error.toString()}`);
}

async function onCreateOfferSuccess(desc) {
  try {
    await pc1.setLocalDescription(desc);
  } catch (e) {
    onSetSessionDescriptionError(e);
  }

  try {
    await pc2.setRemoteDescription(desc);
  } catch (e) {
    onSetSessionDescriptionError(e);
  }

  try {
    const answer = await pc2.createAnswer();
    await onCreateAnswerSuccess(answer);
  } catch (e) {
    onCreateSessionDescriptionError(e);
  }
}

function onSetSessionDescriptionError(error) {
  sendResult('FAILED');
  logOutput(`Failed to set session description: ${error.toString()}`);
}

function gotRemoteStream(e) {
  if (remoteVideo.srcObject !== e.streams[0]) {
    remoteVideo.srcObject = e.streams[0];
    logOutput('pc2 received remote stream');
  }
}

async function onCreateAnswerSuccess(desc) {
  try {
    await pc2.setLocalDescription(desc);
  } catch (e) {
    onSetSessionDescriptionError(e);
  }
  try {
    await pc1.setRemoteDescription(desc);
  } catch (e) {
    onSetSessionDescriptionError(e);
  }
}

async function onIceCandidate(pc, event) {
  try {
    await (getOtherPc(pc).addIceCandidate(event.candidate));
  } catch (e) {
    sendResult('FAILED');
    logOutput(`${getName(pc)} failed to add ICE Candidate: ${e.toString()}`);
  }
}

localVideo.addEventListener('loadedmetadata', function() {
  logOutput(`Local video videoWidth: ${this.videoWidth}px, videoHeight: ${this.videoHeight}px`);
  call();
});

remoteVideo.addEventListener('resize', () => {
  logOutput(`Remote video size changed to ${remoteVideo.videoWidth}x${remoteVideo.videoHeight}`);
  if (startTime) {
    const elapsedTime = window.performance.now() - startTime;
    logOutput('Setup time: ' + elapsedTime.toFixed(3) + 'ms');
    startTime = null;
  }
});

remoteVideo.requestVideoFrameCallback(function rVFC(now, metaData) {
  if (!renderedFramesCount) {
    renderedFramesCount = 0;
  }
  renderedFramesCount = renderedFramesCount + 1;
  const minRequiredFrames = 2;
  if (renderedFramesCount >= minRequiredFrames) {
      logOutput(`Rendered ${renderedFramesCount} frames on remote video.`);
      logOutput('Test complete.');
      sendResult('SUCCESS');
      return;
  }
  remoteVideo.requestVideoFrameCallback(rVFC);
});

start();

</script>

</body>
</html>