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Diffstat (limited to 'contrib/jitsimeetbridge/unjingle/strophe.jingle.sdp.js')
| -rw-r--r-- | contrib/jitsimeetbridge/unjingle/strophe.jingle.sdp.js | 712 |
1 files changed, 712 insertions, 0 deletions
diff --git a/contrib/jitsimeetbridge/unjingle/strophe.jingle.sdp.js b/contrib/jitsimeetbridge/unjingle/strophe.jingle.sdp.js new file mode 100644 index 0000000000..e99dd7bf96 --- /dev/null +++ b/contrib/jitsimeetbridge/unjingle/strophe.jingle.sdp.js @@ -0,0 +1,712 @@ +/* jshint -W117 */ +// SDP STUFF +function SDP(sdp) { + this.media = sdp.split('\r\nm='); + for (var i = 1; i < this.media.length; i++) { + this.media[i] = 'm=' + this.media[i]; + if (i != this.media.length - 1) { + this.media[i] += '\r\n'; + } + } + this.session = this.media.shift() + '\r\n'; + this.raw = this.session + this.media.join(''); +} + +exports.SDP = SDP; + +var jsdom = require("jsdom"); +var window = jsdom.jsdom().parentWindow; +var $ = require('jquery')(window); + +var SDPUtil = require('./strophe.jingle.sdp.util.js').SDPUtil; + +/** + * Returns map of MediaChannel mapped per channel idx. + */ +SDP.prototype.getMediaSsrcMap = function() { + var self = this; + var media_ssrcs = {}; + for (channelNum = 0; channelNum < self.media.length; channelNum++) { + modified = true; + tmp = SDPUtil.find_lines(self.media[channelNum], 'a=ssrc:'); + var type = SDPUtil.parse_mid(SDPUtil.find_line(self.media[channelNum], 'a=mid:')); + var channel = new MediaChannel(channelNum, type); + media_ssrcs[channelNum] = channel; + tmp.forEach(function (line) { + var linessrc = line.substring(7).split(' ')[0]; + // allocate new ChannelSsrc + if(!channel.ssrcs[linessrc]) { + channel.ssrcs[linessrc] = new ChannelSsrc(linessrc, type); + } + channel.ssrcs[linessrc].lines.push(line); + }); + tmp = SDPUtil.find_lines(self.media[channelNum], 'a=ssrc-group:'); + tmp.forEach(function(line){ + var semantics = line.substr(0, idx).substr(13); + var ssrcs = line.substr(14 + semantics.length).split(' '); + if (ssrcs.length != 0) { + var ssrcGroup = new ChannelSsrcGroup(semantics, ssrcs); + channel.ssrcGroups.push(ssrcGroup); + } + }); + } + return media_ssrcs; +}; +/** + * Returns <tt>true</tt> if this SDP contains given SSRC. + * @param ssrc the ssrc to check. + * @returns {boolean} <tt>true</tt> if this SDP contains given SSRC. + */ +SDP.prototype.containsSSRC = function(ssrc) { + var channels = this.getMediaSsrcMap(); + var contains = false; + Object.keys(channels).forEach(function(chNumber){ + var channel = channels[chNumber]; + //console.log("Check", channel, ssrc); + if(Object.keys(channel.ssrcs).indexOf(ssrc) != -1){ + contains = true; + } + }); + return contains; +}; + +/** + * Returns map of MediaChannel that contains only media not contained in <tt>otherSdp</tt>. Mapped by channel idx. + * @param otherSdp the other SDP to check ssrc with. + */ +SDP.prototype.getNewMedia = function(otherSdp) { + + // this could be useful in Array.prototype. + function arrayEquals(array) { + // if the other array is a falsy value, return + if (!array) + return false; + + // compare lengths - can save a lot of time + if (this.length != array.length) + return false; + + for (var i = 0, l=this.length; i < l; i++) { + // Check if we have nested arrays + if (this[i] instanceof Array && array[i] instanceof Array) { + // recurse into the nested arrays + if (!this[i].equals(array[i])) + return false; + } + else if (this[i] != array[i]) { + // Warning - two different object instances will never be equal: {x:20} != {x:20} + return false; + } + } + return true; + } + + var myMedia = this.getMediaSsrcMap(); + var othersMedia = otherSdp.getMediaSsrcMap(); + var newMedia = {}; + Object.keys(othersMedia).forEach(function(channelNum) { + var myChannel = myMedia[channelNum]; + var othersChannel = othersMedia[channelNum]; + if(!myChannel && othersChannel) { + // Add whole channel + newMedia[channelNum] = othersChannel; + return; + } + // Look for new ssrcs accross the channel + Object.keys(othersChannel.ssrcs).forEach(function(ssrc) { + if(Object.keys(myChannel.ssrcs).indexOf(ssrc) === -1) { + // Allocate channel if we've found ssrc that doesn't exist in our channel + if(!newMedia[channelNum]){ + newMedia[channelNum] = new MediaChannel(othersChannel.chNumber, othersChannel.mediaType); + } + newMedia[channelNum].ssrcs[ssrc] = othersChannel.ssrcs[ssrc]; + } + }); + + // Look for new ssrc groups across the channels + othersChannel.ssrcGroups.forEach(function(otherSsrcGroup){ + + // try to match the other ssrc-group with an ssrc-group of ours + var matched = false; + for (var i = 0; i < myChannel.ssrcGroups.length; i++) { + var mySsrcGroup = myChannel.ssrcGroups[i]; + if (otherSsrcGroup.semantics == mySsrcGroup.semantics + && arrayEquals.apply(otherSsrcGroup.ssrcs, [mySsrcGroup.ssrcs])) { + + matched = true; + break; + } + } + + if (!matched) { + // Allocate channel if we've found an ssrc-group that doesn't + // exist in our channel + + if(!newMedia[channelNum]){ + newMedia[channelNum] = new MediaChannel(othersChannel.chNumber, othersChannel.mediaType); + } + newMedia[channelNum].ssrcGroups.push(otherSsrcGroup); + } + }); + }); + return newMedia; +}; + +// remove iSAC and CN from SDP +SDP.prototype.mangle = function () { + var i, j, mline, lines, rtpmap, newdesc; + for (i = 0; i < this.media.length; i++) { + lines = this.media[i].split('\r\n'); + lines.pop(); // remove empty last element + mline = SDPUtil.parse_mline(lines.shift()); + if (mline.media != 'audio') + continue; + newdesc = ''; + mline.fmt.length = 0; + for (j = 0; j < lines.length; j++) { + if (lines[j].substr(0, 9) == 'a=rtpmap:') { + rtpmap = SDPUtil.parse_rtpmap(lines[j]); + if (rtpmap.name == 'CN' || rtpmap.name == 'ISAC') + continue; + mline.fmt.push(rtpmap.id); + newdesc += lines[j] + '\r\n'; + } else { + newdesc += lines[j] + '\r\n'; + } + } + this.media[i] = SDPUtil.build_mline(mline) + '\r\n'; + this.media[i] += newdesc; + } + this.raw = this.session + this.media.join(''); +}; + +// remove lines matching prefix from session section +SDP.prototype.removeSessionLines = function(prefix) { + var self = this; + var lines = SDPUtil.find_lines(this.session, prefix); + lines.forEach(function(line) { + self.session = self.session.replace(line + '\r\n', ''); + }); + this.raw = this.session + this.media.join(''); + return lines; +} +// remove lines matching prefix from a media section specified by mediaindex +// TODO: non-numeric mediaindex could match mid +SDP.prototype.removeMediaLines = function(mediaindex, prefix) { + var self = this; + var lines = SDPUtil.find_lines(this.media[mediaindex], prefix); + lines.forEach(function(line) { + self.media[mediaindex] = self.media[mediaindex].replace(line + '\r\n', ''); + }); + this.raw = this.session + this.media.join(''); + return lines; +} + +// add content's to a jingle element +SDP.prototype.toJingle = function (elem, thecreator) { + var i, j, k, mline, ssrc, rtpmap, tmp, line, lines; + var self = this; + // new bundle plan + if (SDPUtil.find_line(this.session, 'a=group:')) { + lines = SDPUtil.find_lines(this.session, 'a=group:'); + for (i = 0; i < lines.length; i++) { + tmp = lines[i].split(' '); + var semantics = tmp.shift().substr(8); + elem.c('group', {xmlns: 'urn:xmpp:jingle:apps:grouping:0', semantics:semantics}); + for (j = 0; j < tmp.length; j++) { + elem.c('content', {name: tmp[j]}).up(); + } + elem.up(); + } + } + // old bundle plan, to be removed + var bundle = []; + if (SDPUtil.find_line(this.session, 'a=group:BUNDLE')) { + bundle = SDPUtil.find_line(this.session, 'a=group:BUNDLE ').split(' '); + bundle.shift(); + } + for (i = 0; i < this.media.length; i++) { + mline = SDPUtil.parse_mline(this.media[i].split('\r\n')[0]); + if (!(mline.media === 'audio' || + mline.media === 'video' || + mline.media === 'application')) + { + continue; + } + if (SDPUtil.find_line(this.media[i], 'a=ssrc:')) { + ssrc = SDPUtil.find_line(this.media[i], 'a=ssrc:').substring(7).split(' ')[0]; // take the first + } else { + ssrc = false; + } + + elem.c('content', {creator: thecreator, name: mline.media}); + if (SDPUtil.find_line(this.media[i], 'a=mid:')) { + // prefer identifier from a=mid if present + var mid = SDPUtil.parse_mid(SDPUtil.find_line(this.media[i], 'a=mid:')); + elem.attrs({ name: mid }); + + // old BUNDLE plan, to be removed + if (bundle.indexOf(mid) !== -1) { + elem.c('bundle', {xmlns: 'http://estos.de/ns/bundle'}).up(); + bundle.splice(bundle.indexOf(mid), 1); + } + } + + if (SDPUtil.find_line(this.media[i], 'a=rtpmap:').length) + { + elem.c('description', + {xmlns: 'urn:xmpp:jingle:apps:rtp:1', + media: mline.media }); + if (ssrc) { + elem.attrs({ssrc: ssrc}); + } + for (j = 0; j < mline.fmt.length; j++) { + rtpmap = SDPUtil.find_line(this.media[i], 'a=rtpmap:' + mline.fmt[j]); + elem.c('payload-type', SDPUtil.parse_rtpmap(rtpmap)); + // put any 'a=fmtp:' + mline.fmt[j] lines into <param name=foo value=bar/> + if (SDPUtil.find_line(this.media[i], 'a=fmtp:' + mline.fmt[j])) { + tmp = SDPUtil.parse_fmtp(SDPUtil.find_line(this.media[i], 'a=fmtp:' + mline.fmt[j])); + for (k = 0; k < tmp.length; k++) { + elem.c('parameter', tmp[k]).up(); + } + } + this.RtcpFbToJingle(i, elem, mline.fmt[j]); // XEP-0293 -- map a=rtcp-fb + + elem.up(); + } + if (SDPUtil.find_line(this.media[i], 'a=crypto:', this.session)) { + elem.c('encryption', {required: 1}); + var crypto = SDPUtil.find_lines(this.media[i], 'a=crypto:', this.session); + crypto.forEach(function(line) { + elem.c('crypto', SDPUtil.parse_crypto(line)).up(); + }); + elem.up(); // end of encryption + } + + if (ssrc) { + // new style mapping + elem.c('source', { ssrc: ssrc, xmlns: 'urn:xmpp:jingle:apps:rtp:ssma:0' }); + // FIXME: group by ssrc and support multiple different ssrcs + var ssrclines = SDPUtil.find_lines(this.media[i], 'a=ssrc:'); + ssrclines.forEach(function(line) { + idx = line.indexOf(' '); + var linessrc = line.substr(0, idx).substr(7); + if (linessrc != ssrc) { + elem.up(); + ssrc = linessrc; + elem.c('source', { ssrc: ssrc, xmlns: 'urn:xmpp:jingle:apps:rtp:ssma:0' }); + } + var kv = line.substr(idx + 1); + elem.c('parameter'); + if (kv.indexOf(':') == -1) { + elem.attrs({ name: kv }); + } else { + elem.attrs({ name: kv.split(':', 2)[0] }); + elem.attrs({ value: kv.split(':', 2)[1] }); + } + elem.up(); + }); + elem.up(); + + // old proprietary mapping, to be removed at some point + tmp = SDPUtil.parse_ssrc(this.media[i]); + tmp.xmlns = 'http://estos.de/ns/ssrc'; + tmp.ssrc = ssrc; + elem.c('ssrc', tmp).up(); // ssrc is part of description + + // XEP-0339 handle ssrc-group attributes + var ssrc_group_lines = SDPUtil.find_lines(this.media[i], 'a=ssrc-group:'); + ssrc_group_lines.forEach(function(line) { + idx = line.indexOf(' '); + var semantics = line.substr(0, idx).substr(13); + var ssrcs = line.substr(14 + semantics.length).split(' '); + if (ssrcs.length != 0) { + elem.c('ssrc-group', { semantics: semantics, xmlns: 'urn:xmpp:jingle:apps:rtp:ssma:0' }); + ssrcs.forEach(function(ssrc) { + elem.c('source', { ssrc: ssrc }) + .up(); + }); + elem.up(); + } + }); + } + + if (SDPUtil.find_line(this.media[i], 'a=rtcp-mux')) { + elem.c('rtcp-mux').up(); + } + + // XEP-0293 -- map a=rtcp-fb:* + this.RtcpFbToJingle(i, elem, '*'); + + // XEP-0294 + if (SDPUtil.find_line(this.media[i], 'a=extmap:')) { + lines = SDPUtil.find_lines(this.media[i], 'a=extmap:'); + for (j = 0; j < lines.length; j++) { + tmp = SDPUtil.parse_extmap(lines[j]); + elem.c('rtp-hdrext', { xmlns: 'urn:xmpp:jingle:apps:rtp:rtp-hdrext:0', + uri: tmp.uri, + id: tmp.value }); + if (tmp.hasOwnProperty('direction')) { + switch (tmp.direction) { + case 'sendonly': + elem.attrs({senders: 'responder'}); + break; + case 'recvonly': + elem.attrs({senders: 'initiator'}); + break; + case 'sendrecv': + elem.attrs({senders: 'both'}); + break; + case 'inactive': + elem.attrs({senders: 'none'}); + break; + } + } + // TODO: handle params + elem.up(); + } + } + elem.up(); // end of description + } + + // map ice-ufrag/pwd, dtls fingerprint, candidates + this.TransportToJingle(i, elem); + + if (SDPUtil.find_line(this.media[i], 'a=sendrecv', this.session)) { + elem.attrs({senders: 'both'}); + } else if (SDPUtil.find_line(this.media[i], 'a=sendonly', this.session)) { + elem.attrs({senders: 'initiator'}); + } else if (SDPUtil.find_line(this.media[i], 'a=recvonly', this.session)) { + elem.attrs({senders: 'responder'}); + } else if (SDPUtil.find_line(this.media[i], 'a=inactive', this.session)) { + elem.attrs({senders: 'none'}); + } + if (mline.port == '0') { + // estos hack to reject an m-line + elem.attrs({senders: 'rejected'}); + } + elem.up(); // end of content + } + elem.up(); + return elem; +}; + +SDP.prototype.TransportToJingle = function (mediaindex, elem) { + var i = mediaindex; + var tmp; + var self = this; + elem.c('transport'); + + // XEP-0343 DTLS/SCTP + if (SDPUtil.find_line(this.media[mediaindex], 'a=sctpmap:').length) + { + var sctpmap = SDPUtil.find_line( + this.media[i], 'a=sctpmap:', self.session); + if (sctpmap) + { + var sctpAttrs = SDPUtil.parse_sctpmap(sctpmap); + elem.c('sctpmap', + { + xmlns: 'urn:xmpp:jingle:transports:dtls-sctp:1', + number: sctpAttrs[0], /* SCTP port */ + protocol: sctpAttrs[1], /* protocol */ + }); + // Optional stream count attribute + if (sctpAttrs.length > 2) + elem.attrs({ streams: sctpAttrs[2]}); + elem.up(); + } + } + // XEP-0320 + var fingerprints = SDPUtil.find_lines(this.media[mediaindex], 'a=fingerprint:', this.session); + fingerprints.forEach(function(line) { + tmp = SDPUtil.parse_fingerprint(line); + tmp.xmlns = 'urn:xmpp:jingle:apps:dtls:0'; + elem.c('fingerprint').t(tmp.fingerprint); + delete tmp.fingerprint; + line = SDPUtil.find_line(self.media[mediaindex], 'a=setup:', self.session); + if (line) { + tmp.setup = line.substr(8); + } + elem.attrs(tmp); + elem.up(); // end of fingerprint + }); + tmp = SDPUtil.iceparams(this.media[mediaindex], this.session); + if (tmp) { + tmp.xmlns = 'urn:xmpp:jingle:transports:ice-udp:1'; + elem.attrs(tmp); + // XEP-0176 + if (SDPUtil.find_line(this.media[mediaindex], 'a=candidate:', this.session)) { // add any a=candidate lines + var lines = SDPUtil.find_lines(this.media[mediaindex], 'a=candidate:', this.session); + lines.forEach(function (line) { + elem.c('candidate', SDPUtil.candidateToJingle(line)).up(); + }); + } + } + elem.up(); // end of transport +} + +SDP.prototype.RtcpFbToJingle = function (mediaindex, elem, payloadtype) { // XEP-0293 + 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; +}; + |