webrtc-stats/video-psnr.https.html

<!doctype html>
<meta charset=utf-8>
<meta name="timeout" content="long">
<title>RTCPeerConnection getStats test related to outbound-rtp stats</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../webrtc/RTCPeerConnection-helper.js"></script>
<script>
function extractOutboundRtpStats(stats) {
  const wantedStats = [];
  stats.forEach(report => {
    if (report.type === 'outbound-rtp') {
     wantedStats.push(report);
    }
  });
  return wantedStats;
}

promise_test(async (test) => {
  const pc1 = new RTCPeerConnection();
  test.add_cleanup(() => pc1.close());
  const pc2 = new RTCPeerConnection();
  test.add_cleanup(() => pc2.close());

  // PSNR is gated on hardware.
  const stream = await navigator.mediaDevices.getUserMedia({video: true});
  test.add_cleanup(() => stream.getTracks().forEach(t => t.stop()));

  stream.getTracks().forEach(t => pc1.addTrack(t, stream));
  exchangeIceCandidates(pc1, pc2);
  exchangeOfferAnswer(pc1, pc2);
  const {track} = await new Promise(r => pc2.ontrack = r);
  await waitForRtpAndRtcpStats(pc1);
  // Why does ^ not return the stats... and seems unused in general?
  const outboundStats = await pc1.getStats();
  const outboundRtp = [...outboundStats.values()]
    .find(({type}) => type === 'outbound-rtp');
  assert_not_equals(outboundRtp, undefined);
  assert_not_equals(outboundRtp.psnrMeasurements, undefined);
  assert_not_equals(outboundRtp.psnrSum, undefined);
  assert_not_equals(outboundRtp.psnrSum.y, undefined);
  assert_not_equals(outboundRtp.psnrSum.u, undefined);
  assert_not_equals(outboundRtp.psnrSum.v, undefined);
}, 'video psnr stats are present');

promise_test(async (test) => {
  const pc1 = new RTCPeerConnection();
  test.add_cleanup(() => pc1.close());
  const pc2 = new RTCPeerConnection();
  test.add_cleanup(() => pc2.close());

  // PSNR is gated on hardware so this will fail.
  const stream = await getNoiseStream({video: true});
  test.add_cleanup(() => stream.getTracks().forEach(t => t.stop()));

  stream.getTracks().forEach(t => pc1.addTrack(t, stream));
  exchangeIceCandidates(pc1, pc2);
  exchangeOfferAnswer(pc1, pc2);
  const {track} = await new Promise(r => pc2.ontrack = r);
  await waitForRtpAndRtcpStats(pc1);
  // Why does ^ not return the stats... and seems unused in general?
  const outboundStats = await pc1.getStats();
  const outboundRtp = [...outboundStats.values()]
    .find(({type}) => type === 'outbound-rtp');
  assert_not_equals(outboundRtp, undefined);
  assert_equals(outboundRtp.psnrMeasurements, undefined);
  assert_equals(outboundRtp.psnrSum, undefined);
}, 'video psnr stats are gated on hardware');

</script>