helper.js - mozsearch

Enable keyboard shortcuts

"use strict";

async function setupLoopbackWithCodecAndGetReader(t, codec) {

  const caller = new RTCPeerConnection({encodedInsertableStreams:true});

  t.add_cleanup(() => caller.close());

  const callee = new RTCPeerConnection();

  t.add_cleanup(() => callee.close());

  await setMediaPermission("granted", ["camera"]);

  const stream = await navigator.mediaDevices.getUserMedia({video:true});

  const videoTrack = stream.getVideoTracks()[0];

  t.add_cleanup(() => videoTrack.stop());

  const transceiver = caller.addTransceiver(videoTrack);

  const codecCapability =

      RTCRtpSender.getCapabilities('video').codecs.find(capability => {

        return capability.mimeType.includes(codec);

});

  assert_not_equals(codecCapability, undefined);

  transceiver.setCodecPreferences([codecCapability]);

  const senderStreams = transceiver.sender.createEncodedStreams();

  exchangeIceCandidates(caller, callee);

  await exchangeOfferAnswer(caller, callee);

  return senderStreams.readable.getReader();