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712 lines
27 KiB
JavaScript
712 lines
27 KiB
JavaScript
/* jshint -W117 */
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// SDP STUFF
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function SDP(sdp) {
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this.media = sdp.split('\r\nm=');
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for (var i = 1; i < this.media.length; i++) {
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this.media[i] = 'm=' + this.media[i];
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if (i != this.media.length - 1) {
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this.media[i] += '\r\n';
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}
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}
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this.session = this.media.shift() + '\r\n';
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this.raw = this.session + this.media.join('');
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}
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exports.SDP = SDP;
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var jsdom = require("jsdom");
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var window = jsdom.jsdom().parentWindow;
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var $ = require('jquery')(window);
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var SDPUtil = require('./strophe.jingle.sdp.util.js').SDPUtil;
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/**
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* Returns map of MediaChannel mapped per channel idx.
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*/
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SDP.prototype.getMediaSsrcMap = function() {
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var self = this;
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var media_ssrcs = {};
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for (channelNum = 0; channelNum < self.media.length; channelNum++) {
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modified = true;
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tmp = SDPUtil.find_lines(self.media[channelNum], 'a=ssrc:');
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var type = SDPUtil.parse_mid(SDPUtil.find_line(self.media[channelNum], 'a=mid:'));
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var channel = new MediaChannel(channelNum, type);
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media_ssrcs[channelNum] = channel;
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tmp.forEach(function (line) {
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var linessrc = line.substring(7).split(' ')[0];
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// allocate new ChannelSsrc
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if(!channel.ssrcs[linessrc]) {
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channel.ssrcs[linessrc] = new ChannelSsrc(linessrc, type);
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}
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channel.ssrcs[linessrc].lines.push(line);
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});
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tmp = SDPUtil.find_lines(self.media[channelNum], 'a=ssrc-group:');
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tmp.forEach(function(line){
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var semantics = line.substr(0, idx).substr(13);
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var ssrcs = line.substr(14 + semantics.length).split(' ');
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if (ssrcs.length != 0) {
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var ssrcGroup = new ChannelSsrcGroup(semantics, ssrcs);
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channel.ssrcGroups.push(ssrcGroup);
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}
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});
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}
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return media_ssrcs;
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};
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/**
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* Returns <tt>true</tt> if this SDP contains given SSRC.
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* @param ssrc the ssrc to check.
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* @returns {boolean} <tt>true</tt> if this SDP contains given SSRC.
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*/
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SDP.prototype.containsSSRC = function(ssrc) {
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var channels = this.getMediaSsrcMap();
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var contains = false;
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Object.keys(channels).forEach(function(chNumber){
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var channel = channels[chNumber];
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//console.log("Check", channel, ssrc);
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if(Object.keys(channel.ssrcs).indexOf(ssrc) != -1){
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contains = true;
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}
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});
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return contains;
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};
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/**
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* Returns map of MediaChannel that contains only media not contained in <tt>otherSdp</tt>. Mapped by channel idx.
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* @param otherSdp the other SDP to check ssrc with.
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*/
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SDP.prototype.getNewMedia = function(otherSdp) {
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// this could be useful in Array.prototype.
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function arrayEquals(array) {
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// if the other array is a falsy value, return
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if (!array)
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return false;
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// compare lengths - can save a lot of time
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if (this.length != array.length)
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return false;
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for (var i = 0, l=this.length; i < l; i++) {
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// Check if we have nested arrays
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if (this[i] instanceof Array && array[i] instanceof Array) {
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// recurse into the nested arrays
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if (!this[i].equals(array[i]))
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return false;
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}
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else if (this[i] != array[i]) {
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// Warning - two different object instances will never be equal: {x:20} != {x:20}
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return false;
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}
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}
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return true;
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}
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var myMedia = this.getMediaSsrcMap();
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var othersMedia = otherSdp.getMediaSsrcMap();
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var newMedia = {};
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Object.keys(othersMedia).forEach(function(channelNum) {
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var myChannel = myMedia[channelNum];
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var othersChannel = othersMedia[channelNum];
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if(!myChannel && othersChannel) {
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// Add whole channel
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newMedia[channelNum] = othersChannel;
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return;
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}
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// Look for new ssrcs accross the channel
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Object.keys(othersChannel.ssrcs).forEach(function(ssrc) {
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if(Object.keys(myChannel.ssrcs).indexOf(ssrc) === -1) {
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// Allocate channel if we've found ssrc that doesn't exist in our channel
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if(!newMedia[channelNum]){
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newMedia[channelNum] = new MediaChannel(othersChannel.chNumber, othersChannel.mediaType);
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}
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newMedia[channelNum].ssrcs[ssrc] = othersChannel.ssrcs[ssrc];
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}
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});
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// Look for new ssrc groups across the channels
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othersChannel.ssrcGroups.forEach(function(otherSsrcGroup){
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// try to match the other ssrc-group with an ssrc-group of ours
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var matched = false;
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for (var i = 0; i < myChannel.ssrcGroups.length; i++) {
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var mySsrcGroup = myChannel.ssrcGroups[i];
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if (otherSsrcGroup.semantics == mySsrcGroup.semantics
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&& arrayEquals.apply(otherSsrcGroup.ssrcs, [mySsrcGroup.ssrcs])) {
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matched = true;
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break;
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}
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}
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if (!matched) {
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// Allocate channel if we've found an ssrc-group that doesn't
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// exist in our channel
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if(!newMedia[channelNum]){
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newMedia[channelNum] = new MediaChannel(othersChannel.chNumber, othersChannel.mediaType);
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}
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newMedia[channelNum].ssrcGroups.push(otherSsrcGroup);
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}
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});
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});
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return newMedia;
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};
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// remove iSAC and CN from SDP
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SDP.prototype.mangle = function () {
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var i, j, mline, lines, rtpmap, newdesc;
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for (i = 0; i < this.media.length; i++) {
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lines = this.media[i].split('\r\n');
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lines.pop(); // remove empty last element
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mline = SDPUtil.parse_mline(lines.shift());
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if (mline.media != 'audio')
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continue;
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newdesc = '';
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mline.fmt.length = 0;
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for (j = 0; j < lines.length; j++) {
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if (lines[j].substr(0, 9) == 'a=rtpmap:') {
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rtpmap = SDPUtil.parse_rtpmap(lines[j]);
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if (rtpmap.name == 'CN' || rtpmap.name == 'ISAC')
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continue;
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mline.fmt.push(rtpmap.id);
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newdesc += lines[j] + '\r\n';
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} else {
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newdesc += lines[j] + '\r\n';
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}
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}
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this.media[i] = SDPUtil.build_mline(mline) + '\r\n';
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this.media[i] += newdesc;
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}
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this.raw = this.session + this.media.join('');
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};
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// remove lines matching prefix from session section
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SDP.prototype.removeSessionLines = function(prefix) {
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var self = this;
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var lines = SDPUtil.find_lines(this.session, prefix);
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lines.forEach(function(line) {
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self.session = self.session.replace(line + '\r\n', '');
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});
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this.raw = this.session + this.media.join('');
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return lines;
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}
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// remove lines matching prefix from a media section specified by mediaindex
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// TODO: non-numeric mediaindex could match mid
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SDP.prototype.removeMediaLines = function(mediaindex, prefix) {
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var self = this;
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var lines = SDPUtil.find_lines(this.media[mediaindex], prefix);
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lines.forEach(function(line) {
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self.media[mediaindex] = self.media[mediaindex].replace(line + '\r\n', '');
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});
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this.raw = this.session + this.media.join('');
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return lines;
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}
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// add content's to a jingle element
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SDP.prototype.toJingle = function (elem, thecreator) {
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var i, j, k, mline, ssrc, rtpmap, tmp, line, lines;
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var self = this;
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// new bundle plan
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if (SDPUtil.find_line(this.session, 'a=group:')) {
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lines = SDPUtil.find_lines(this.session, 'a=group:');
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for (i = 0; i < lines.length; i++) {
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tmp = lines[i].split(' ');
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var semantics = tmp.shift().substr(8);
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elem.c('group', {xmlns: 'urn:xmpp:jingle:apps:grouping:0', semantics:semantics});
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for (j = 0; j < tmp.length; j++) {
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elem.c('content', {name: tmp[j]}).up();
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}
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elem.up();
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}
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}
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// old bundle plan, to be removed
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var bundle = [];
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if (SDPUtil.find_line(this.session, 'a=group:BUNDLE')) {
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bundle = SDPUtil.find_line(this.session, 'a=group:BUNDLE ').split(' ');
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bundle.shift();
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}
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for (i = 0; i < this.media.length; i++) {
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mline = SDPUtil.parse_mline(this.media[i].split('\r\n')[0]);
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if (!(mline.media === 'audio' ||
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mline.media === 'video' ||
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mline.media === 'application'))
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{
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continue;
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}
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if (SDPUtil.find_line(this.media[i], 'a=ssrc:')) {
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ssrc = SDPUtil.find_line(this.media[i], 'a=ssrc:').substring(7).split(' ')[0]; // take the first
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} else {
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ssrc = false;
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}
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elem.c('content', {creator: thecreator, name: mline.media});
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if (SDPUtil.find_line(this.media[i], 'a=mid:')) {
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// prefer identifier from a=mid if present
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var mid = SDPUtil.parse_mid(SDPUtil.find_line(this.media[i], 'a=mid:'));
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elem.attrs({ name: mid });
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// old BUNDLE plan, to be removed
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if (bundle.indexOf(mid) !== -1) {
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elem.c('bundle', {xmlns: 'http://estos.de/ns/bundle'}).up();
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bundle.splice(bundle.indexOf(mid), 1);
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}
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}
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if (SDPUtil.find_line(this.media[i], 'a=rtpmap:').length)
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{
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elem.c('description',
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{xmlns: 'urn:xmpp:jingle:apps:rtp:1',
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media: mline.media });
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if (ssrc) {
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elem.attrs({ssrc: ssrc});
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}
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for (j = 0; j < mline.fmt.length; j++) {
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rtpmap = SDPUtil.find_line(this.media[i], 'a=rtpmap:' + mline.fmt[j]);
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elem.c('payload-type', SDPUtil.parse_rtpmap(rtpmap));
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// put any 'a=fmtp:' + mline.fmt[j] lines into <param name=foo value=bar/>
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if (SDPUtil.find_line(this.media[i], 'a=fmtp:' + mline.fmt[j])) {
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tmp = SDPUtil.parse_fmtp(SDPUtil.find_line(this.media[i], 'a=fmtp:' + mline.fmt[j]));
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for (k = 0; k < tmp.length; k++) {
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elem.c('parameter', tmp[k]).up();
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}
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}
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this.RtcpFbToJingle(i, elem, mline.fmt[j]); // XEP-0293 -- map a=rtcp-fb
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elem.up();
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}
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if (SDPUtil.find_line(this.media[i], 'a=crypto:', this.session)) {
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elem.c('encryption', {required: 1});
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var crypto = SDPUtil.find_lines(this.media[i], 'a=crypto:', this.session);
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crypto.forEach(function(line) {
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elem.c('crypto', SDPUtil.parse_crypto(line)).up();
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});
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elem.up(); // end of encryption
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}
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if (ssrc) {
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// new style mapping
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elem.c('source', { ssrc: ssrc, xmlns: 'urn:xmpp:jingle:apps:rtp:ssma:0' });
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// FIXME: group by ssrc and support multiple different ssrcs
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var ssrclines = SDPUtil.find_lines(this.media[i], 'a=ssrc:');
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ssrclines.forEach(function(line) {
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idx = line.indexOf(' ');
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var linessrc = line.substr(0, idx).substr(7);
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if (linessrc != ssrc) {
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elem.up();
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ssrc = linessrc;
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elem.c('source', { ssrc: ssrc, xmlns: 'urn:xmpp:jingle:apps:rtp:ssma:0' });
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}
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var kv = line.substr(idx + 1);
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elem.c('parameter');
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if (kv.indexOf(':') == -1) {
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elem.attrs({ name: kv });
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} else {
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elem.attrs({ name: kv.split(':', 2)[0] });
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elem.attrs({ value: kv.split(':', 2)[1] });
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}
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elem.up();
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});
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elem.up();
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// old proprietary mapping, to be removed at some point
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tmp = SDPUtil.parse_ssrc(this.media[i]);
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tmp.xmlns = 'http://estos.de/ns/ssrc';
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tmp.ssrc = ssrc;
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elem.c('ssrc', tmp).up(); // ssrc is part of description
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// XEP-0339 handle ssrc-group attributes
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var ssrc_group_lines = SDPUtil.find_lines(this.media[i], 'a=ssrc-group:');
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ssrc_group_lines.forEach(function(line) {
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idx = line.indexOf(' ');
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var semantics = line.substr(0, idx).substr(13);
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var ssrcs = line.substr(14 + semantics.length).split(' ');
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if (ssrcs.length != 0) {
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elem.c('ssrc-group', { semantics: semantics, xmlns: 'urn:xmpp:jingle:apps:rtp:ssma:0' });
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ssrcs.forEach(function(ssrc) {
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elem.c('source', { ssrc: ssrc })
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.up();
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});
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elem.up();
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}
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});
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}
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if (SDPUtil.find_line(this.media[i], 'a=rtcp-mux')) {
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elem.c('rtcp-mux').up();
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}
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// XEP-0293 -- map a=rtcp-fb:*
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this.RtcpFbToJingle(i, elem, '*');
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// XEP-0294
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if (SDPUtil.find_line(this.media[i], 'a=extmap:')) {
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lines = SDPUtil.find_lines(this.media[i], 'a=extmap:');
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for (j = 0; j < lines.length; j++) {
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tmp = SDPUtil.parse_extmap(lines[j]);
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elem.c('rtp-hdrext', { xmlns: 'urn:xmpp:jingle:apps:rtp:rtp-hdrext:0',
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uri: tmp.uri,
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id: tmp.value });
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if (tmp.hasOwnProperty('direction')) {
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switch (tmp.direction) {
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case 'sendonly':
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elem.attrs({senders: 'responder'});
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break;
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case 'recvonly':
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elem.attrs({senders: 'initiator'});
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break;
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case 'sendrecv':
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elem.attrs({senders: 'both'});
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break;
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case 'inactive':
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elem.attrs({senders: 'none'});
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break;
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}
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}
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// TODO: handle params
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elem.up();
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}
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}
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elem.up(); // end of description
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}
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// map ice-ufrag/pwd, dtls fingerprint, candidates
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this.TransportToJingle(i, elem);
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if (SDPUtil.find_line(this.media[i], 'a=sendrecv', this.session)) {
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elem.attrs({senders: 'both'});
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} else if (SDPUtil.find_line(this.media[i], 'a=sendonly', this.session)) {
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elem.attrs({senders: 'initiator'});
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} else if (SDPUtil.find_line(this.media[i], 'a=recvonly', this.session)) {
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elem.attrs({senders: 'responder'});
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} else if (SDPUtil.find_line(this.media[i], 'a=inactive', this.session)) {
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elem.attrs({senders: 'none'});
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}
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if (mline.port == '0') {
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// estos hack to reject an m-line
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elem.attrs({senders: 'rejected'});
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}
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elem.up(); // end of content
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}
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elem.up();
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return elem;
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};
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SDP.prototype.TransportToJingle = function (mediaindex, elem) {
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var i = mediaindex;
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var tmp;
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var self = this;
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elem.c('transport');
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// XEP-0343 DTLS/SCTP
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if (SDPUtil.find_line(this.media[mediaindex], 'a=sctpmap:').length)
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{
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var sctpmap = SDPUtil.find_line(
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this.media[i], 'a=sctpmap:', self.session);
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if (sctpmap)
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{
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var sctpAttrs = SDPUtil.parse_sctpmap(sctpmap);
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elem.c('sctpmap',
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{
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xmlns: 'urn:xmpp:jingle:transports:dtls-sctp:1',
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number: sctpAttrs[0], /* SCTP port */
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protocol: sctpAttrs[1], /* protocol */
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});
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// Optional stream count attribute
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if (sctpAttrs.length > 2)
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elem.attrs({ streams: sctpAttrs[2]});
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elem.up();
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}
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}
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// XEP-0320
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var fingerprints = SDPUtil.find_lines(this.media[mediaindex], 'a=fingerprint:', this.session);
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fingerprints.forEach(function(line) {
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tmp = SDPUtil.parse_fingerprint(line);
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tmp.xmlns = 'urn:xmpp:jingle:apps:dtls:0';
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elem.c('fingerprint').t(tmp.fingerprint);
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delete tmp.fingerprint;
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line = SDPUtil.find_line(self.media[mediaindex], 'a=setup:', self.session);
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if (line) {
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tmp.setup = line.substr(8);
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}
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elem.attrs(tmp);
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elem.up(); // end of fingerprint
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});
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tmp = SDPUtil.iceparams(this.media[mediaindex], this.session);
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if (tmp) {
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tmp.xmlns = 'urn:xmpp:jingle:transports:ice-udp:1';
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elem.attrs(tmp);
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// XEP-0176
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if (SDPUtil.find_line(this.media[mediaindex], 'a=candidate:', this.session)) { // add any a=candidate lines
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var lines = SDPUtil.find_lines(this.media[mediaindex], 'a=candidate:', this.session);
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lines.forEach(function (line) {
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elem.c('candidate', SDPUtil.candidateToJingle(line)).up();
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});
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}
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}
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elem.up(); // end of transport
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}
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SDP.prototype.RtcpFbToJingle = function (mediaindex, elem, payloadtype) { // XEP-0293
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var lines = SDPUtil.find_lines(this.media[mediaindex], 'a=rtcp-fb:' + payloadtype);
|
|
lines.forEach(function (line) {
|
|
var tmp = SDPUtil.parse_rtcpfb(line);
|
|
if (tmp.type == 'trr-int') {
|
|
elem.c('rtcp-fb-trr-int', {xmlns: 'urn:xmpp:jingle:apps:rtp:rtcp-fb:0', value: tmp.params[0]});
|
|
elem.up();
|
|
} else {
|
|
elem.c('rtcp-fb', {xmlns: 'urn:xmpp:jingle:apps:rtp:rtcp-fb:0', type: tmp.type});
|
|
if (tmp.params.length > 0) {
|
|
elem.attrs({'subtype': tmp.params[0]});
|
|
}
|
|
elem.up();
|
|
}
|
|
});
|
|
};
|
|
|
|
SDP.prototype.RtcpFbFromJingle = function (elem, payloadtype) { // XEP-0293
|
|
var media = '';
|
|
var tmp = elem.find('>rtcp-fb-trr-int[xmlns="urn:xmpp:jingle:apps:rtp:rtcp-fb:0"]');
|
|
if (tmp.length) {
|
|
media += 'a=rtcp-fb:' + '*' + ' ' + 'trr-int' + ' ';
|
|
if (tmp.attr('value')) {
|
|
media += tmp.attr('value');
|
|
} else {
|
|
media += '0';
|
|
}
|
|
media += '\r\n';
|
|
}
|
|
tmp = elem.find('>rtcp-fb[xmlns="urn:xmpp:jingle:apps:rtp:rtcp-fb:0"]');
|
|
tmp.each(function () {
|
|
media += 'a=rtcp-fb:' + payloadtype + ' ' + $(this).attr('type');
|
|
if ($(this).attr('subtype')) {
|
|
media += ' ' + $(this).attr('subtype');
|
|
}
|
|
media += '\r\n';
|
|
});
|
|
return media;
|
|
};
|
|
|
|
// construct an SDP from a jingle stanza
|
|
SDP.prototype.fromJingle = function (jingle) {
|
|
var self = this;
|
|
this.raw = 'v=0\r\n' +
|
|
'o=- ' + '1923518516' + ' 2 IN IP4 0.0.0.0\r\n' +// FIXME
|
|
's=-\r\n' +
|
|
't=0 0\r\n';
|
|
// http://tools.ietf.org/html/draft-ietf-mmusic-sdp-bundle-negotiation-04#section-8
|
|
if ($(jingle).find('>group[xmlns="urn:xmpp:jingle:apps:grouping:0"]').length) {
|
|
$(jingle).find('>group[xmlns="urn:xmpp:jingle:apps:grouping:0"]').each(function (idx, group) {
|
|
var contents = $(group).find('>content').map(function (idx, content) {
|
|
return content.getAttribute('name');
|
|
}).get();
|
|
if (contents.length > 0) {
|
|
self.raw += 'a=group:' + (group.getAttribute('semantics') || group.getAttribute('type')) + ' ' + contents.join(' ') + '\r\n';
|
|
}
|
|
});
|
|
} else if ($(jingle).find('>group[xmlns="urn:ietf:rfc:5888"]').length) {
|
|
// temporary namespace, not to be used. to be removed soon.
|
|
$(jingle).find('>group[xmlns="urn:ietf:rfc:5888"]').each(function (idx, group) {
|
|
var contents = $(group).find('>content').map(function (idx, content) {
|
|
return content.getAttribute('name');
|
|
}).get();
|
|
if (group.getAttribute('type') !== null && contents.length > 0) {
|
|
self.raw += 'a=group:' + group.getAttribute('type') + ' ' + contents.join(' ') + '\r\n';
|
|
}
|
|
});
|
|
} else {
|
|
// for backward compability, to be removed soon
|
|
// assume all contents are in the same bundle group, can be improved upon later
|
|
var bundle = $(jingle).find('>content').filter(function (idx, content) {
|
|
//elem.c('bundle', {xmlns:'http://estos.de/ns/bundle'});
|
|
return $(content).find('>bundle').length > 0;
|
|
}).map(function (idx, content) {
|
|
return content.getAttribute('name');
|
|
}).get();
|
|
if (bundle.length) {
|
|
this.raw += 'a=group:BUNDLE ' + bundle.join(' ') + '\r\n';
|
|
}
|
|
}
|
|
|
|
this.session = this.raw;
|
|
jingle.find('>content').each(function () {
|
|
var m = self.jingle2media($(this));
|
|
self.media.push(m);
|
|
});
|
|
|
|
// reconstruct msid-semantic -- apparently not necessary
|
|
/*
|
|
var msid = SDPUtil.parse_ssrc(this.raw);
|
|
if (msid.hasOwnProperty('mslabel')) {
|
|
this.session += "a=msid-semantic: WMS " + msid.mslabel + "\r\n";
|
|
}
|
|
*/
|
|
|
|
this.raw = this.session + this.media.join('');
|
|
};
|
|
|
|
// translate a jingle content element into an an SDP media part
|
|
SDP.prototype.jingle2media = function (content) {
|
|
var media = '',
|
|
desc = content.find('description'),
|
|
ssrc = desc.attr('ssrc'),
|
|
self = this,
|
|
tmp;
|
|
var sctp = content.find(
|
|
'>transport>sctpmap[xmlns="urn:xmpp:jingle:transports:dtls-sctp:1"]');
|
|
|
|
tmp = { media: desc.attr('media') };
|
|
tmp.port = '1';
|
|
if (content.attr('senders') == 'rejected') {
|
|
// estos hack to reject an m-line.
|
|
tmp.port = '0';
|
|
}
|
|
if (content.find('>transport>fingerprint').length || desc.find('encryption').length) {
|
|
if (sctp.length)
|
|
tmp.proto = 'DTLS/SCTP';
|
|
else
|
|
tmp.proto = 'RTP/SAVPF';
|
|
} else {
|
|
tmp.proto = 'RTP/AVPF';
|
|
}
|
|
if (!sctp.length)
|
|
{
|
|
tmp.fmt = desc.find('payload-type').map(
|
|
function () { return this.getAttribute('id'); }).get();
|
|
media += SDPUtil.build_mline(tmp) + '\r\n';
|
|
}
|
|
else
|
|
{
|
|
media += 'm=application 1 DTLS/SCTP ' + sctp.attr('number') + '\r\n';
|
|
media += 'a=sctpmap:' + sctp.attr('number') +
|
|
' ' + sctp.attr('protocol');
|
|
|
|
var streamCount = sctp.attr('streams');
|
|
if (streamCount)
|
|
media += ' ' + streamCount + '\r\n';
|
|
else
|
|
media += '\r\n';
|
|
}
|
|
|
|
media += 'c=IN IP4 0.0.0.0\r\n';
|
|
if (!sctp.length)
|
|
media += 'a=rtcp:1 IN IP4 0.0.0.0\r\n';
|
|
//tmp = content.find('>transport[xmlns="urn:xmpp:jingle:transports:ice-udp:1"]');
|
|
tmp = content.find('>bundle>transport[xmlns="urn:xmpp:jingle:transports:ice-udp:1"]');
|
|
//console.log('transports: '+content.find('>transport[xmlns="urn:xmpp:jingle:transports:ice-udp:1"]').length);
|
|
//console.log('bundle.transports: '+content.find('>bundle>transport[xmlns="urn:xmpp:jingle:transports:ice-udp:1"]').length);
|
|
//console.log("tmp fingerprint: "+tmp.find('>fingerprint').innerHTML);
|
|
if (tmp.length) {
|
|
if (tmp.attr('ufrag')) {
|
|
media += SDPUtil.build_iceufrag(tmp.attr('ufrag')) + '\r\n';
|
|
}
|
|
if (tmp.attr('pwd')) {
|
|
media += SDPUtil.build_icepwd(tmp.attr('pwd')) + '\r\n';
|
|
}
|
|
tmp.find('>fingerprint').each(function () {
|
|
// FIXME: check namespace at some point
|
|
media += 'a=fingerprint:' + this.getAttribute('hash');
|
|
media += ' ' + $(this).text();
|
|
media += '\r\n';
|
|
//console.log("mline "+media);
|
|
if (this.getAttribute('setup')) {
|
|
media += 'a=setup:' + this.getAttribute('setup') + '\r\n';
|
|
}
|
|
});
|
|
}
|
|
switch (content.attr('senders')) {
|
|
case 'initiator':
|
|
media += 'a=sendonly\r\n';
|
|
break;
|
|
case 'responder':
|
|
media += 'a=recvonly\r\n';
|
|
break;
|
|
case 'none':
|
|
media += 'a=inactive\r\n';
|
|
break;
|
|
case 'both':
|
|
media += 'a=sendrecv\r\n';
|
|
break;
|
|
}
|
|
media += 'a=mid:' + content.attr('name') + '\r\n';
|
|
/*if (content.attr('name') == 'video') {
|
|
media += 'a=x-google-flag:conference' + '\r\n';
|
|
}*/
|
|
|
|
// <description><rtcp-mux/></description>
|
|
// see http://code.google.com/p/libjingle/issues/detail?id=309 -- no spec though
|
|
// and http://mail.jabber.org/pipermail/jingle/2011-December/001761.html
|
|
if (desc.find('rtcp-mux').length) {
|
|
media += 'a=rtcp-mux\r\n';
|
|
}
|
|
|
|
if (desc.find('encryption').length) {
|
|
desc.find('encryption>crypto').each(function () {
|
|
media += 'a=crypto:' + this.getAttribute('tag');
|
|
media += ' ' + this.getAttribute('crypto-suite');
|
|
media += ' ' + this.getAttribute('key-params');
|
|
if (this.getAttribute('session-params')) {
|
|
media += ' ' + this.getAttribute('session-params');
|
|
}
|
|
media += '\r\n';
|
|
});
|
|
}
|
|
desc.find('payload-type').each(function () {
|
|
media += SDPUtil.build_rtpmap(this) + '\r\n';
|
|
if ($(this).find('>parameter').length) {
|
|
media += 'a=fmtp:' + this.getAttribute('id') + ' ';
|
|
media += $(this).find('parameter').map(function () { return (this.getAttribute('name') ? (this.getAttribute('name') + '=') : '') + this.getAttribute('value'); }).get().join('; ');
|
|
media += '\r\n';
|
|
}
|
|
// xep-0293
|
|
media += self.RtcpFbFromJingle($(this), this.getAttribute('id'));
|
|
});
|
|
|
|
// xep-0293
|
|
media += self.RtcpFbFromJingle(desc, '*');
|
|
|
|
// xep-0294
|
|
tmp = desc.find('>rtp-hdrext[xmlns="urn:xmpp:jingle:apps:rtp:rtp-hdrext:0"]');
|
|
tmp.each(function () {
|
|
media += 'a=extmap:' + this.getAttribute('id') + ' ' + this.getAttribute('uri') + '\r\n';
|
|
});
|
|
|
|
content.find('>bundle>transport[xmlns="urn:xmpp:jingle:transports:ice-udp:1"]>candidate').each(function () {
|
|
media += SDPUtil.candidateFromJingle(this);
|
|
});
|
|
|
|
// XEP-0339 handle ssrc-group attributes
|
|
tmp = content.find('description>ssrc-group[xmlns="urn:xmpp:jingle:apps:rtp:ssma:0"]').each(function() {
|
|
var semantics = this.getAttribute('semantics');
|
|
var ssrcs = $(this).find('>source').map(function() {
|
|
return this.getAttribute('ssrc');
|
|
}).get();
|
|
|
|
if (ssrcs.length != 0) {
|
|
media += 'a=ssrc-group:' + semantics + ' ' + ssrcs.join(' ') + '\r\n';
|
|
}
|
|
});
|
|
|
|
tmp = content.find('description>source[xmlns="urn:xmpp:jingle:apps:rtp:ssma:0"]');
|
|
tmp.each(function () {
|
|
var ssrc = this.getAttribute('ssrc');
|
|
$(this).find('>parameter').each(function () {
|
|
media += 'a=ssrc:' + ssrc + ' ' + this.getAttribute('name');
|
|
if (this.getAttribute('value') && this.getAttribute('value').length)
|
|
media += ':' + this.getAttribute('value');
|
|
media += '\r\n';
|
|
});
|
|
});
|
|
|
|
if (tmp.length === 0) {
|
|
// fallback to proprietary mapping of a=ssrc lines
|
|
tmp = content.find('description>ssrc[xmlns="http://estos.de/ns/ssrc"]');
|
|
if (tmp.length) {
|
|
media += 'a=ssrc:' + ssrc + ' cname:' + tmp.attr('cname') + '\r\n';
|
|
media += 'a=ssrc:' + ssrc + ' msid:' + tmp.attr('msid') + '\r\n';
|
|
media += 'a=ssrc:' + ssrc + ' mslabel:' + tmp.attr('mslabel') + '\r\n';
|
|
media += 'a=ssrc:' + ssrc + ' label:' + tmp.attr('label') + '\r\n';
|
|
}
|
|
}
|
|
return media;
|
|
};
|
|
|