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<!DOCTYPE HTML>
<html>
<head>
  <script type="application/javascript" src="pc.js"></script>
  <script type="application/javascript" src="parser_rtp.js"></script>
  <script type="application/javascript" src="/tests/dom/canvas/test/captureStream_common.js"></script>
</head>
<body>
<pre id="test">
<script type="application/javascript">
  createHTML({
    bug: "1231507",
    title: "Basic video-only peer connection with Simulcast offer",
    visible: true
  });

  function addRIDExtension(pc, extensionId) {
    const receivers = pc._pc.getReceivers();
    is(receivers.length, 1, "We have exactly one RTP receiver");
    const receiver = receivers[0];

    SpecialPowers.wrap(pc._pc).mozAddRIDExtension(receiver, extensionId);
  }

  function selectRecvRID(pc, rid) {
    const receivers = pc._pc.getReceivers();
    is(receivers.length, 1, "We have exactly one RTP receiver");
    const receiver = receivers[0];

    SpecialPowers.wrap(pc._pc).mozAddRIDFilter(receiver, rid);
  }

  runNetworkTest(() =>
    pushPrefs(['media.peerconnection.simulcast', true],
              // 180Kbps was determined empirically, set well-higher than
              // the 80Kbps+overhead needed for the two simulcast streams.
              // 100Kbps was apparently too low.
              ['media.peerconnection.video.min_bitrate_estimate', 180*1000]).then(() => {
      let emitter, helper;

      const test = new PeerConnectionTest({bundle: false});
      test.setMediaConstraints([{video: true}], []);

      test.chain.replace("PC_LOCAL_GUM", [
        function PC_LOCAL_CANVAS_CAPTURESTREAM(test) {
          emitter = new VideoFrameEmitter();
          helper = new VideoStreamHelper();
          test.pcLocal.attachLocalStream(emitter.stream());
          emitter.start();
        }
      ]);

      test.chain.insertBefore('PC_LOCAL_CREATE_OFFER', [
        function PC_LOCAL_SET_RIDS(test) {
          const senders = test.pcLocal._pc.getSenders();
          is(senders.length, 1, "We have exactly one RTP sender");
          const sender = senders[0];
          ok(sender.track, "Sender has a track");

          return sender.setParameters({
            encodings: [{ rid: "foo", maxBitrate: 40000 },
                        { rid: "bar", maxBitrate: 40000, scaleResolutionDownBy: 2 }]
          });
        }
      ]);

      test.chain.insertAfter('PC_LOCAL_GET_ANSWER', [
        function PC_LOCAL_ADD_RIDS_TO_ANSWER(test) {
          test._remote_answer.sdp = sdputils.transferSimulcastProperties(
            test.originalOffer.sdp, test._remote_answer.sdp);
          info("Answer with RIDs: " + JSON.stringify(test._remote_answer));
          ok(test._remote_answer.sdp.match(/a=simulcast:/), "Modified answer has simulcast");
          ok(test._remote_answer.sdp.match(/a=rid:foo/), "Modified answer has rid foo");
          ok(test._remote_answer.sdp.match(/a=rid:bar/), "Modified answer has rid bar");
          ok(test._remote_answer.sdp.match(/urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id/), "Modified answer has RID");
        }
      ]);

      // For storing the rid extension so it can be checked in the RTP
      let ridExtensionId = 0;

      // do this after set local description so the MediaPipeline
      // has been created.
      test.chain.insertAfter('PC_REMOTE_SET_LOCAL_DESCRIPTION',[
        function PC_REMOTE_SET_RTP_FIRST_RID(test) {
          const extmap_id = test.originalOffer.sdp.match(
              "a=extmap:([0-9+])/sendonly urn:ietf:params:rtp-hdrext:sdes:rtp-stream-id");
          ok(extmap_id, "Original offer has extmap id for simulcast: " + extmap_id[1]);
          ridExtensionId = extmap_id[1];
          // Cause pcRemote to filter out everything but RID "foo", only
          // allowing one of the simulcast streams through.
          addRIDExtension(test.pcRemote, extmap_id[1]);
          selectRecvRID(test.pcRemote, "foo");
        }
      ]);

      let getRtpPacket = (pc) => {
        pc.mozEnablePacketDump(0, "rtp", false);
        return new Promise((res, rej) =>
          pc.mozSetPacketCallback((...args) => {
            res([...args]);
            pc.mozSetPacketCallback(() => {});
            pc.mozDisablePacketDump(0, "rtp", false);
          })
        );
      }

      test.chain.insertBefore('PC_REMOTE_WAIT_FOR_MEDIA_FLOW', [
          async function PC_REMOTE_CHECK_RID_IN_RTP() {
            let pc = SpecialPowers.wrap(test.pcRemote._pc);
            let [level, type, sending, data] =  await getRtpPacket(pc);
            let extensions = ParseRtpPacket(data).header.extensions;
            ok(ridExtensionId, "RID extension ID has been extracted from SDP");
            let ridExt = extensions.find(e => e.id == ridExtensionId);
            ok(ridExt, "RID is present in RTP.");
            is(new TextDecoder('utf-8').decode(ridExt.data), "foo",
               "RID is 'foo'.");
          }
      ]);

      test.chain.append([
        async function PC_REMOTE_WAIT_FOR_FRAMES() {
          const vremote = test.pcRemote.remoteMediaElements[0];
          ok(vremote, "Should have remote video element for pcRemote");
          emitter.start();
          await helper.checkVideoPlaying(vremote);
          emitter.stop();
        },
        function PC_REMOTE_CHECK_SIZE_1() {
          const vlocal = test.pcLocal.localMediaElements[0];
          const vremote = test.pcRemote.remoteMediaElements[0];
          ok(vlocal, "Should have local video element for pcLocal");
          ok(vremote, "Should have remote video element for pcRemote");
          is(vlocal.videoWidth, 50, "correct source width");
          is(vlocal.videoHeight, 50, "correct source height");
          is(vremote.videoWidth, 48,
             "sink is same width as source, modulo our cropping algorithm");
          is(vremote.videoHeight, 48,
             "sink is same height as source, modulo our cropping algorithm");
        },
        function PC_REMOTE_SET_RTP_SECOND_RID(test) {
          // Now, cause pcRemote to filter out everything but RID "bar", only
          // allowing the other simulcast stream through.
          selectRecvRID(test.pcRemote, "bar");
        },
        function PC_REMOTE_WAIT_FOR_SECOND_MEDIA_FLOW(test) {
          return test.pcRemote.waitForMediaFlow();
        },
        async function PC_REMOTE_WAIT_FOR_FRAMES_2() {
          const vremote = test.pcRemote.remoteMediaElements[0];
          ok(vremote, "Should have remote video element for pcRemote");
          emitter.start();
          await helper.checkVideoPlaying(vremote);
          emitter.stop();
        },
        // For some reason, even though we're getting a 25x25 stream, sometimes
        // the resolution isn't updated on the video element on the first frame.
        async function PC_REMOTE_WAIT_FOR_FRAMES_3() {
          const vremote = test.pcRemote.remoteMediaElements[0];
          ok(vremote, "Should have remote video element for pcRemote");
          emitter.start();
          await helper.checkVideoPlaying(vremote);
          emitter.stop();
        },
        function PC_REMOTE_CHECK_SIZE_2() {
          const vlocal = test.pcLocal.localMediaElements[0];
          const vremote = test.pcRemote.remoteMediaElements[0];
          ok(vlocal, "Should have local video element for pcLocal");
          ok(vremote, "Should have remote video element for pcRemote");
          is(vlocal.videoWidth, 50, "correct source width");
          is(vlocal.videoHeight, 50, "correct source height");
          is(vremote.videoWidth, 24,
             "sink is 1/2 width of source, modulo our cropping algorithm");
          is(vremote.videoHeight, 24,
             "sink is 1/2 height of source, modulo our cropping algorithm");
        },
      ]);

      return test.run();
  })
  .catch(e => ok(false, "unexpected failure: " + e)));
</script>
</pre>
</body>
</html>