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var sendChannel;
var sendButton = document.getElementById("sendButton");
var sendTextarea = document.getElementById("dataChannelSend");
var receiveTextarea = document.getElementById("dataChannelReceive");
sendButton.onclick = sendData;

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varpc_constraints = {
'optional': [
{'DtlsSrtpKeyAgreement': true},
{'RtpDataChannels': true}
]};
est à remplacer par :
varpc_constraints = {
'optional': [
{'DtlsSrtpKeyAgreement': true}
]};

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if (isInitiator) {
try{
//Reliable DataChannelsnotyet supportedinChrome
sendChannel = pc.createDataChannel("sendDataChannel",
{reliable: false});
sendChannel.onmessage = handleMessage;
trace('Createdsenddatachannel');
} catch (e) {
alert('Failedtocreatedatachannel. ' +
'You needChrome M25or later with RtpDataChannelenabled');

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var canvasRemoteElement = document.querySelector('#canvasRemoteVideo');
var ctxRemote = canvasRemoteElement.getContext('2d');
function snapshot(){
var canvasToUse = canvasRemoteElement;
var contextToUse = ctxRemote;
varvideoToUse = remoteVideo;
canvasRemoteElement.width = remoteVideo.videoWidth;
canvasRemoteElement.height = remoteVideo.videoHeight;
if (remoteStream){
ctxRemote.drawImage(remoteVideo,0,0);

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var init = false;
function snapshot(){
var canvasToUse = canvasRemoteElement;
var contextToUse = ctxRemote;
varvideoToUse = remoteVideo;
canvasRemoteElement.width = remoteVideo.videoWidth;
canvasRemoteElement.height = remoteVideo.videoHeight;
if (remoteStream){
ctxRemote.drawImage(remoteVideo,0,0);
}

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this.refresh = function(){
update();
}
// main render loop
varupdate = function()
{
smooth();
draw();
frames++;
//requestAnimFrame(function() {update(); });

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//draw colormap->palettevalues toscreen
vardraw = function()
{
// render theimagedatatotheoffscreen buffer...
bufferContext.putImageData(imageData,0,0);
// ...then draw it toscaletotheonscreen canvas
// Imagedebaseen bas !
drawAngle(0);
drawAngle(90);
drawAngle(180);

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vardims = {};
this.canvas = undefined;
this.init = function(dim)
{
context = this.canvas.getContext('2d');
width = Math.round(this.canvas.width / scale);
height = Math.round(this.canvas.height / scale);
if (dim){
dims = dim;
}else{

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// setpixels in imageData
vardrawPixel = function(x,y, color)
{
varoffset = (x + y*imageData.width)*4;
imageData.data[offset] = color[0];
imageData.data[offset + 1] = color[1];
imageData.data[offset + 2] = color[2];
if (color[0] <= 100 && color[1] === 0 && color[2] <= 100){
imageData.data[offset + 3] = 0;
}else{

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function drawEllipse(ctx, x,y, w, h) {
varkappa = .5522848,
ox = (w /2)*kappa, // controlpointoffset horizontal
oy = (h /2)*kappa, // controlpointoffsetvertical
xe = x + w, // x-end
ye = y + h, //y-end
xm = x + w /2, // x-middle
ym = y + h /2; //y-middle
ctx.beginPath();
ctx.moveTo(x,ym);