| <html> |
| <head> |
| <script type="text/javascript" src="webrtc_test_utilities.js"></script> |
| <script type="text/javascript"> |
| $ = function(id) { |
| return document.getElementById(id); |
| }; |
| |
| var gFirstConnection = null; |
| var gSecondConnection = null; |
| var gTestWithoutMsid = false; |
| |
| var gLocalStream = null; |
| var gSentTones = ''; |
| |
| var gRemoteStreams = {}; |
| |
| // Default transform functions, overridden by some test cases. |
| var transformSdp = function(sdp) { return sdp; }; |
| var transformRemoteSdp = function(sdp) { return sdp; }; |
| var transformCandidate = function(candidate) { return candidate; }; |
| |
| // When using external SDES, the crypto key is chosen by javascript. |
| var EXTERNAL_SDES_LINES = { |
| 'audio': 'a=crypto:1 AES_CM_128_HMAC_SHA1_80 ' + |
| 'inline:PS1uQCVeeCFCanVmcjkpPywjNWhcYD0mXXtxaVBR', |
| 'video': 'a=crypto:1 AES_CM_128_HMAC_SHA1_80 ' + |
| 'inline:d0RmdmcmVCspeEc3QGZiNWpVLFJhQX1cfHAwJSoj', |
| 'data': 'a=crypto:1 AES_CM_128_HMAC_SHA1_80 ' + |
| 'inline:NzB4d1BINUAvLEw6UzF3WSJ+PSdFcGdUJShpX1Zj' |
| }; |
| |
| // When using GICE, the ICE credentials can be chosen by javascript. |
| var EXTERNAL_GICE_UFRAG = '1234567890123456'; |
| var EXTERNAL_GICE_PWD = '123456789012345678901234'; |
| |
| setAllEventsOccuredHandler(function() { |
| document.title = 'OK'; |
| }); |
| |
| // Test that we can setup call with an audio and video track. |
| function call(constraints) { |
| createConnections(null); |
| navigator.webkitGetUserMedia(constraints, |
| addStreamToBothConnectionsAndNegotiate, printGetUserMediaError); |
| waitForVideo('remote-view-1'); |
| waitForVideo('remote-view-2'); |
| } |
| |
| // First calls without streams on any connections, and then adds a stream |
| // to peer connection 1 which gets sent to peer connection 2. We must wait |
| // for the first negotiation to complete before starting the second one, which |
| // is why we wait until the connection is stable before re-negotiating. |
| function callEmptyThenAddOneStreamAndRenegotiate(constraints) { |
| createConnections(null); |
| negotiate(); |
| waitForConnectionToStabilize(gFirstConnection); |
| navigator.webkitGetUserMedia(constraints, |
| addStreamToTheFirstConnectionAndNegotiate, printGetUserMediaError); |
| // Only the first connection is sending here. |
| waitForVideo('remote-view-2'); |
| } |
| |
| // First makes a call between pc1 and pc2, and then makes a call between pc3 |
| // and pc4 where the remote streams from pc1 and pc2 will be used as the local |
| // streams of pc3 and pc4. |
| function callAndForwardRemoteStream(constraints) { |
| createConnections(null); |
| navigator.webkitGetUserMedia(constraints, |
| addStreamToBothConnectionsAndNegotiate, |
| printGetUserMediaError); |
| var gotRemoteStream1 = false; |
| var gotRemoteStream2 = false; |
| |
| var onRemoteStream1 = function() { |
| gotRemoteStream1 = true; |
| maybeCallEstablished(); |
| } |
| |
| var onRemoteStream2 = function() { |
| gotRemoteStream2 = true; |
| maybeCallEstablished(); |
| } |
| |
| var maybeCallEstablished = function() { |
| if (gotRemoteStream1 && gotRemoteStream2) { |
| onCallEstablished(); |
| } |
| } |
| |
| var onCallEstablished = function() { |
| thirdConnection = createConnection(null, 'remote-view-3'); |
| thirdConnection.addStream(gRemoteStreams['remote-view-1']); |
| |
| fourthConnection = createConnection(null, 'remote-view-4'); |
| fourthConnection.addStream(gRemoteStreams['remote-view-2']); |
| |
| negotiateBetween(thirdConnection, fourthConnection); |
| |
| waitForVideo('remote-view-3'); |
| waitForVideo('remote-view-4'); |
| } |
| |
| // Do the forwarding after we have received video. |
| detectVideoIn('remote-view-1', onRemoteStream1); |
| detectVideoIn('remote-view-2', onRemoteStream2); |
| } |
| |
| // Test that we can setup call with an audio and video track and |
| // simulate that the remote peer don't support MSID. |
| function callWithoutMsidAndBundle() { |
| createConnections(null); |
| transformSdp = removeBundle; |
| transformRemoteSdp = removeMsid; |
| gTestWithoutMsid = true; |
| navigator.webkitGetUserMedia({audio: true, video: true}, |
| addStreamToBothConnectionsAndNegotiate, printGetUserMediaError); |
| waitForVideo('remote-view-1'); |
| waitForVideo('remote-view-2'); |
| } |
| |
| // Test that we can setup call with legacy settings. |
| function callWithLegacySdp() { |
| transformSdp = function(sdp) { |
| return removeBundle(useGice(useExternalSdes(sdp))); |
| }; |
| transformCandidate = addGiceCredsToCandidate; |
| createConnections({ |
| 'mandatory': {'RtpDataChannels': true, 'DtlsSrtpKeyAgreement': false} |
| }); |
| setupDataChannel({reliable: false}); |
| navigator.webkitGetUserMedia({audio: true, video: true}, |
| addStreamToBothConnectionsAndNegotiate, printGetUserMediaError); |
| waitForVideo('remote-view-1'); |
| waitForVideo('remote-view-2'); |
| } |
| |
| // Test only a data channel. |
| function callWithDataOnly() { |
| createConnections({optional:[{RtpDataChannels: true}]}); |
| setupDataChannel({reliable: false}); |
| negotiate(); |
| } |
| |
| function callWithSctpDataOnly() { |
| createConnections({optional: [{DtlsSrtpKeyAgreement: true}]}); |
| setupSctpDataChannel({reliable: true}); |
| negotiate(); |
| } |
| |
| // Test call with audio, video and a data channel. |
| function callWithDataAndMedia() { |
| createConnections({optional:[{RtpDataChannels: true}]}); |
| setupDataChannel({reliable: false}); |
| navigator.webkitGetUserMedia({audio: true, video: true}, |
| addStreamToBothConnectionsAndNegotiate, |
| printGetUserMediaError); |
| waitForVideo('remote-view-1'); |
| waitForVideo('remote-view-2'); |
| } |
| |
| function callWithSctpDataAndMedia() { |
| createConnections({optional: [{DtlsSrtpKeyAgreement: true}]}); |
| setupSctpDataChannel({reliable: true}); |
| navigator.webkitGetUserMedia({audio: true, video: true}, |
| addStreamToBothConnectionsAndNegotiate, |
| printGetUserMediaError); |
| waitForVideo('remote-view-1'); |
| waitForVideo('remote-view-2'); |
| } |
| |
| |
| // Test call with a data channel and later add audio and video. |
| function callWithDataAndLaterAddMedia() { |
| createConnections({optional:[{RtpDataChannels: true}]}); |
| setupDataChannel({reliable: false}); |
| negotiate(); |
| |
| // Set an event handler for when the data channel has been closed. |
| setAllEventsOccuredHandler(function() { |
| // When the video is flowing the test is done. |
| setAllEventsOccuredHandler(function() { |
| document.title = 'OK'; |
| }); |
| navigator.webkitGetUserMedia({audio: true, video: true}, |
| addStreamToBothConnectionsAndNegotiate, printGetUserMediaError); |
| waitForVideo('remote-view-1'); |
| waitForVideo('remote-view-2'); |
| }); |
| } |
| |
| // Test that we can setup call and send DTMF. |
| function callAndSendDtmf(tones) { |
| createConnections(null); |
| navigator.webkitGetUserMedia({audio: true, video: true}, |
| addStreamToBothConnectionsAndNegotiate, printGetUserMediaError); |
| var onCallEstablished = function() { |
| // Send DTMF tones. |
| var localAudioTrack = gLocalStream.getAudioTracks()[0]; |
| var dtmfSender = gFirstConnection.createDTMFSender(localAudioTrack); |
| dtmfSender.ontonechange = onToneChange; |
| dtmfSender.insertDTMF(tones); |
| // Wait for the DTMF tones callback. |
| document.title = 'Waiting for dtmf...'; |
| addExpectedEvent(); |
| var waitDtmf = setInterval(function() { |
| if (gSentTones == tones) { |
| clearInterval(waitDtmf); |
| eventOccured(); |
| } |
| }, 100); |
| } |
| |
| // Do the DTMF test after we have received video. |
| detectVideoIn('remote-view-2', onCallEstablished); |
| } |
| |
| // Test call with a new Video MediaStream that has been created based on a |
| // stream generated by getUserMedia. |
| function callWithNewVideoMediaStream() { |
| createConnections(null); |
| navigator.webkitGetUserMedia({audio: true, video: true}, |
| createNewVideoStreamAndAddToBothConnections, printGetUserMediaError); |
| waitForVideo('remote-view-1'); |
| waitForVideo('remote-view-2'); |
| } |
| |
| // Test call with a new Video MediaStream that has been created based on a |
| // stream generated by getUserMedia. When Video is flowing, an audio track |
| // is added to the sent stream and the video track is removed. This |
| // is to test that adding and removing of remote tracks on an existing |
| // mediastream works. |
| function callWithNewVideoMediaStreamLaterSwitchToAudio() { |
| createConnections(null); |
| navigator.webkitGetUserMedia({audio: true, video: true}, |
| createNewVideoStreamAndAddToBothConnections, printGetUserMediaError); |
| |
| waitForVideo('remote-view-1'); |
| waitForVideo('remote-view-2'); |
| |
| // Set an event handler for when video is playing. |
| setAllEventsOccuredHandler(function() { |
| // Add an audio track to the local stream and remove the video track and |
| // then renegotiate. But first - setup the expectations. |
| local_stream = gFirstConnection.getLocalStreams()[0]; |
| |
| remote_stream_1 = gFirstConnection.getRemoteStreams()[0]; |
| // Add an expected event that onaddtrack will be called on the remote |
| // mediastream received on gFirstConnection when the audio track is |
| // received. |
| addExpectedEvent(); |
| remote_stream_1.onaddtrack = function(){ |
| expectEquals(remote_stream_1.getAudioTracks()[0].id, |
| local_stream.getAudioTracks()[0].id); |
| eventOccured(); |
| } |
| |
| // Add an expectation that the received video track is removed from |
| // gFirstConnection. |
| addExpectedEvent(); |
| remote_stream_1.onremovetrack = function() { |
| eventOccured(); |
| } |
| |
| // Add an expected event that onaddtrack will be called on the remote |
| // mediastream received on gSecondConnection when the audio track is |
| // received. |
| remote_stream_2 = gSecondConnection.getRemoteStreams()[0]; |
| addExpectedEvent(); |
| remote_stream_2.onaddtrack = function() { |
| expectEquals(remote_stream_2.getAudioTracks()[0].id, |
| local_stream.getAudioTracks()[0].id); |
| eventOccured(); |
| } |
| |
| // Add an expectation that the received video track is removed from |
| // gSecondConnection. |
| addExpectedEvent(); |
| remote_stream_2.onremovetrack = function() { |
| eventOccured(); |
| } |
| // When all the above events have occurred- the test pass. |
| setAllEventsOccuredHandler(function() { document.title = 'OK'; }); |
| |
| local_stream.addTrack(gLocalStream.getAudioTracks()[0]); |
| local_stream.removeTrack(local_stream.getVideoTracks()[0]); |
| negotiate(); |
| }); // End of setAllEventsOccuredHandler. |
| } |
| |
| // This function is used for setting up a test that: |
| // 1. Creates a data channel on |gFirstConnection| and sends data to |
| // |gSecondConnection|. |
| // 2. When data is received on |gSecondConnection| a message |
| // is sent to |gFirstConnection|. |
| // 3. When data is received on |gFirstConnection|, the data |
| // channel is closed. The test passes when the state transition completes. |
| function setupDataChannel(params) { |
| var sendDataString = "send some text on a data channel." |
| firstDataChannel = gFirstConnection.createDataChannel( |
| "sendDataChannel", params); |
| expectEquals('connecting', firstDataChannel.readyState); |
| |
| // When |firstDataChannel| transition to open state, send a text string. |
| firstDataChannel.onopen = function() { |
| expectEquals('open', firstDataChannel.readyState); |
| firstDataChannel.send(sendDataString); |
| } |
| |
| // When |firstDataChannel| receive a message, close the channel and |
| // initiate a new offer/answer exchange to complete the closure. |
| firstDataChannel.onmessage = function(event) { |
| expectEquals(event.data, sendDataString); |
| firstDataChannel.close(); |
| negotiate(); |
| } |
| |
| // When |firstDataChannel| transition to closed state, the test pass. |
| addExpectedEvent(); |
| firstDataChannel.onclose = function() { |
| expectEquals('closed', firstDataChannel.readyState); |
| eventOccured(); |
| } |
| |
| // Event handler for when |gSecondConnection| receive a new dataChannel. |
| gSecondConnection.ondatachannel = function (event) { |
| var secondDataChannel = event.channel; |
| |
| // When |secondDataChannel| receive a message, send a message back. |
| secondDataChannel.onmessage = function(event) { |
| expectEquals(event.data, sendDataString); |
| expectEquals('open', secondDataChannel.readyState); |
| secondDataChannel.send(sendDataString); |
| } |
| } |
| } |
| |
| // SCTP data channel setup is slightly different then RTP based |
| // channels. Due to a bug in libjingle, we can't send data immediately |
| // after channel becomes open. So for that reason in SCTP, |
| // we are sending data from second channel, when ondatachannel event is |
| // received. So data flow happens 2 -> 1 -> 2. |
| function setupSctpDataChannel(params) { |
| var sendDataString = "send some text on a data channel." |
| firstDataChannel = gFirstConnection.createDataChannel( |
| "sendDataChannel", params); |
| expectEquals('connecting', firstDataChannel.readyState); |
| |
| // When |firstDataChannel| transition to open state, send a text string. |
| firstDataChannel.onopen = function() { |
| expectEquals('open', firstDataChannel.readyState); |
| } |
| |
| // When |firstDataChannel| receive a message, send message back. |
| // initiate a new offer/answer exchange to complete the closure. |
| firstDataChannel.onmessage = function(event) { |
| expectEquals('open', firstDataChannel.readyState); |
| expectEquals(event.data, sendDataString); |
| firstDataChannel.send(sendDataString); |
| } |
| |
| |
| // Event handler for when |gSecondConnection| receive a new dataChannel. |
| gSecondConnection.ondatachannel = function (event) { |
| var secondDataChannel = event.channel; |
| secondDataChannel.send(sendDataString); |
| |
| // When |secondDataChannel| receive a message, close the channel and |
| // initiate a new offer/answer exchange to complete the closure. |
| secondDataChannel.onmessage = function(event) { |
| expectEquals(event.data, sendDataString); |
| expectEquals('open', secondDataChannel.readyState); |
| secondDataChannel.close(); |
| negotiate(); |
| } |
| |
| // When |secondDataChannel| transition to closed state, the test pass. |
| addExpectedEvent(); |
| secondDataChannel.onclose = function() { |
| expectEquals('closed', secondDataChannel.readyState); |
| eventOccured(); |
| } |
| } |
| } |
| |
| // Test call with a stream that has been created by getUserMedia, clone |
| // the stream to a cloned stream, send them via the same peer connection. |
| function addTwoMediaStreamsToOneConnection() { |
| createConnections(null); |
| navigator.webkitGetUserMedia({audio: true, video: true}, |
| CloneStreamAndAddTwoStreamstoOneConnection, printGetUserMediaError); |
| } |
| |
| function onToneChange(tone) { |
| gSentTones += tone.tone; |
| document.title = gSentTones; |
| } |
| |
| function createConnections(constraints) { |
| gFirstConnection = createConnection(constraints, 'remote-view-1'); |
| expectEquals('stable', gFirstConnection.signalingState); |
| |
| gSecondConnection = createConnection(constraints, 'remote-view-2'); |
| expectEquals('stable', gSecondConnection.signalingState); |
| } |
| |
| function createConnection(constraints, remoteView) { |
| var pc = new webkitRTCPeerConnection(null, constraints); |
| pc.onaddstream = function(event) { |
| onRemoteStream(event, remoteView); |
| } |
| return pc; |
| } |
| |
| function displayAndRemember(localStream) { |
| var localStreamUrl = webkitURL.createObjectURL(localStream); |
| $('local-view').src = localStreamUrl; |
| |
| gLocalStream = localStream; |
| } |
| |
| // Called if getUserMedia fails. |
| function printGetUserMediaError(error) { |
| document.title = 'getUserMedia request failed with code ' + error.code; |
| } |
| |
| // Called if getUserMedia succeeds and we want to send from both connections. |
| function addStreamToBothConnectionsAndNegotiate(localStream) { |
| displayAndRemember(localStream); |
| gFirstConnection.addStream(localStream); |
| gSecondConnection.addStream(localStream); |
| negotiate(); |
| } |
| |
| // Called if getUserMedia succeeds when we want to send from one connection. |
| function addStreamToTheFirstConnectionAndNegotiate(localStream) { |
| displayAndRemember(localStream); |
| gFirstConnection.addStream(localStream); |
| negotiate(); |
| } |
| |
| function verifyHasOneAudioAndVideoTrack(stream) { |
| expectEquals(1, stream.getAudioTracks().length); |
| expectEquals(1, stream.getVideoTracks().length); |
| } |
| |
| // Called if getUserMedia succeeds, then clone the stream, send two streams |
| // from one peer connection. |
| function CloneStreamAndAddTwoStreamstoOneConnection(localStream) { |
| displayAndRemember(localStream); |
| var clonedStream = new webkitMediaStream(); |
| clonedStream.addTrack(localStream.getVideoTracks()[0]); |
| clonedStream.addTrack(localStream.getAudioTracks()[0]); |
| gFirstConnection.addStream(localStream); |
| gFirstConnection.addStream(clonedStream); |
| |
| // Verify the local streams are correct. |
| expectEquals(2, gFirstConnection.getLocalStreams().length); |
| verifyHasOneAudioAndVideoTrack(gFirstConnection.getLocalStreams()[0]); |
| verifyHasOneAudioAndVideoTrack(gFirstConnection.getLocalStreams()[1]); |
| |
| // The remote side should receive two streams. After that, verify the |
| // remote side has the correct number of streams and tracks. |
| addExpectedEvent(); |
| addExpectedEvent(); |
| gSecondConnection.onaddstream = function(event) { |
| eventOccured(); |
| } |
| setAllEventsOccuredHandler(function() { |
| // Negotiation complete, verify remote streams on the receiving side. |
| expectEquals(2, gSecondConnection.getRemoteStreams().length); |
| verifyHasOneAudioAndVideoTrack(gSecondConnection.getRemoteStreams()[0]); |
| verifyHasOneAudioAndVideoTrack(gSecondConnection.getRemoteStreams()[1]); |
| |
| document.title = "OK"; |
| }); |
| |
| negotiate(); |
| } |
| |
| // Called if getUserMedia succeeds when we want to send a modified |
| // MediaStream. A new MediaStream is created and the video track from |
| // |localStream| is added. |
| function createNewVideoStreamAndAddToBothConnections(localStream) { |
| displayAndRemember(localStream); |
| var new_stream = new webkitMediaStream(); |
| new_stream.addTrack(localStream.getVideoTracks()[0]); |
| gFirstConnection.addStream(new_stream); |
| gSecondConnection.addStream(new_stream); |
| negotiate(); |
| } |
| |
| function negotiate() { |
| negotiateBetween(gFirstConnection, gSecondConnection); |
| } |
| |
| function negotiateBetween(caller, callee) { |
| // Not stable = negotiation is ongoing. The behavior of re-negotiating while |
| // a negotiation is ongoing is more or less undefined, so avoid this. |
| if (caller.signalingState != 'stable') |
| throw 'You can only negotiate when the connection is stable!'; |
| |
| connectOnIceCandidate(caller, callee); |
| |
| caller.createOffer( |
| function (offer) { |
| onOfferCreated(offer, caller, callee); |
| }); |
| } |
| |
| function onOfferCreated(offer, caller, callee) { |
| offer.sdp = transformSdp(offer.sdp); |
| caller.setLocalDescription(offer); |
| expectEquals('have-local-offer', caller.signalingState); |
| receiveOffer(offer.sdp, caller, callee); |
| } |
| |
| function receiveOffer(offerSdp, caller, callee) { |
| offerSdp = transformRemoteSdp(offerSdp); |
| |
| var parsedOffer = new RTCSessionDescription({ type: 'offer', |
| sdp: offerSdp }); |
| callee.setRemoteDescription(parsedOffer); |
| callee.createAnswer(function (answer) { |
| onAnswerCreated(answer, caller, callee); |
| }); |
| expectEquals('have-remote-offer', callee.signalingState); |
| } |
| |
| function removeMsid(offerSdp) { |
| offerSdp = offerSdp.replace(/a=msid-semantic.*\r\n/g, ''); |
| offerSdp = offerSdp.replace('a=mid:audio\r\n', ''); |
| offerSdp = offerSdp.replace('a=mid:video\r\n', ''); |
| offerSdp = offerSdp.replace(/a=ssrc.*\r\n/g, ''); |
| return offerSdp; |
| } |
| |
| function removeBundle(sdp) { |
| return sdp.replace(/a=group:BUNDLE .*\r\n/g, ''); |
| } |
| |
| function useGice(sdp) { |
| sdp = sdp.replace(/t=.*\r\n/g, function(subString) { |
| return subString + 'a=ice-options:google-ice\r\n'; |
| }); |
| sdp = sdp.replace(/a=ice-ufrag:.*\r\n/g, |
| 'a=ice-ufrag:' + EXTERNAL_GICE_UFRAG + '\r\n'); |
| sdp = sdp.replace(/a=ice-pwd:.*\r\n/g, |
| 'a=ice-pwd:' + EXTERNAL_GICE_PWD + '\r\n'); |
| return sdp; |
| } |
| |
| function useExternalSdes(sdp) { |
| // Remove current crypto specification. |
| sdp = sdp.replace(/a=crypto.*\r\n/g, ''); |
| sdp = sdp.replace(/a=fingerprint.*\r\n/g, ''); |
| // Add external crypto. This is not compatible with |removeMsid|. |
| sdp = sdp.replace(/a=mid:(\w+)\r\n/g, function(subString, group) { |
| return subString + EXTERNAL_SDES_LINES[group] + '\r\n'; |
| }); |
| return sdp; |
| } |
| |
| function onAnswerCreated(answer, caller, callee) { |
| answer.sdp = transformSdp(answer.sdp); |
| callee.setLocalDescription(answer); |
| expectEquals('stable', callee.signalingState); |
| receiveAnswer(answer.sdp, caller); |
| } |
| |
| function receiveAnswer(answerSdp, caller) { |
| answerSdp = transformRemoteSdp(answerSdp); |
| var parsedAnswer = new RTCSessionDescription({ type: 'answer', |
| sdp: answerSdp }); |
| caller.setRemoteDescription(parsedAnswer); |
| expectEquals('stable', caller.signalingState); |
| } |
| |
| function connectOnIceCandidate(caller, callee) { |
| caller.onicecandidate = function(event) { onIceCandidate(event, callee); } |
| callee.onicecandidate = function(event) { onIceCandidate(event, caller); } |
| } |
| |
| function addGiceCredsToCandidate(candidate) { |
| return candidate.trimRight() + |
| ' username ' + EXTERNAL_GICE_UFRAG + ' password ' + EXTERNAL_GICE_PWD; |
| } |
| |
| function onIceCandidate(event, target) { |
| if (event.candidate) { |
| var candidate = new RTCIceCandidate(event.candidate); |
| candidate.candidate = transformCandidate(candidate.candidate); |
| target.addIceCandidate(candidate); |
| } |
| } |
| |
| function onRemoteStream(e, target) { |
| if (gTestWithoutMsid && e.stream.id != "default") { |
| document.title = 'a default remote stream was expected but instead ' + |
| e.stream.id + ' was received.'; |
| return; |
| } |
| gRemoteStreams[target] = e.stream; |
| var remoteStreamUrl = webkitURL.createObjectURL(e.stream); |
| var remoteVideo = $(target); |
| remoteVideo.src = remoteStreamUrl; |
| } |
| |
| </script> |
| </head> |
| <body> |
| <table border="0"> |
| <tr> |
| <td>Local Preview</td> |
| <td>Remote Stream for Connection 1</td> |
| <td>Remote Stream for Connection 2</td> |
| <td>Remote Stream for Connection 3</td> |
| <td>Remote Stream for Connection 4</td> |
| </tr> |
| <tr> |
| <td><video width="320" height="240" id="local-view" |
| autoplay="autoplay"></video></td> |
| <td><video width="320" height="240" id="remote-view-1" |
| autoplay="autoplay"></video></td> |
| <td><video width="320" height="240" id="remote-view-2" |
| autoplay="autoplay"></video></td> |
| <td><video width="320" height="240" id="remote-view-3" |
| autoplay="autoplay"></video></td> |
| <td><video width="320" height="240" id="remote-view-4" |
| autoplay="autoplay"></video></td> |
| <!-- Canvases are named after their corresponding video elements. --> |
| <td><canvas width="320" height="240" id="remote-view-1-canvas" |
| style="display:none"></canvas></td> |
| <td><canvas width="320" height="240" id="remote-view-2-canvas" |
| style="display:none"></canvas></td> |
| <td><canvas width="320" height="240" id="remote-view-3-canvas" |
| style="display:none"></canvas></td> |
| <td><canvas width="320" height="240" id="remote-view-4-canvas" |
| style="display:none"></canvas></td> |
| </tr> |
| </table> |
| </body> |
| </html> |