123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964 |
- import $ from 'jquery';
- import { cloneDeep } from 'lodash-es';
- import transform from 'sdp-transform';
- import { Strophe } from 'strophe.js';
-
- import { MediaDirection } from '../../service/RTC/MediaDirection';
- import { MediaType } from '../../service/RTC/MediaType';
- import { SSRC_GROUP_SEMANTICS } from '../../service/RTC/StandardVideoQualitySettings';
- import { XEP } from '../../service/xmpp/XMPPExtensioProtocols';
- import browser from '../browser';
-
- import SDPUtil from './SDPUtil';
-
- /**
- * A class that translates the Jingle messages received from the signaling server into SDP format that the
- * browser understands and vice versa. This is needed for media session establishment and for signaling local and
- * remote sources across peers.
- */
- export default class SDP {
- /**
- * Constructor.
- *
- * @param {string} sdp - The SDP generated by the browser when SDP->Jingle conversion is needed, an empty string
- * when Jingle->SDP conversion is needed.
- * @param {boolean} isP2P - Whether this SDP belongs to a p2p peerconnection.
- */
- constructor(sdp, isP2P = false) {
- this._updateSessionAndMediaSections(sdp);
- this.isP2P = isP2P;
- this.raw = this.session + this.media.join('');
-
- // This flag will make {@link transportToJingle} and {@link jingle2media} replace ICE candidates IPs with
- // invalid value of '1.1.1.1' which will cause ICE failure. The flag is used in the automated testing.
- this.failICE = false;
-
- // Whether or not to remove TCP ice candidates when translating from/to jingle.
- this.removeTcpCandidates = false;
-
- // Whether or not to remove UDP ice candidates when translating from/to jingle.
- this.removeUdpCandidates = false;
- }
-
- /**
- * Updates the media and session sections of the SDP based on the raw SDP string.
- *
- * @param {string} sdp - The SDP generated by the browser.
- * @returns {void}
- * @private
- */
- _updateSessionAndMediaSections(sdp) {
- const media = typeof sdp === 'string' ? sdp.split('\r\nm=') : this.raw.split('\r\nm=');
-
- for (let i = 1, length = media.length; i < length; i++) {
- let mediaI = `m=${media[i]}`;
-
- if (i !== length - 1) {
- mediaI += '\r\n';
- }
- media[i] = mediaI;
- }
- this.session = `${media.shift()}\r\n`;
- this.media = media;
- }
-
- /**
- * Adds or removes the sources from the SDP.
- *
- * @param {Object} sourceMap - The map of the sources that are being added/removed.
- * @param {boolean} isAdd - Whether the sources are being added or removed.
- * @returns {Array<number>} - The indices of the new m-lines that were added/modifed in the SDP.
- */
- updateRemoteSources(sourceMap, isAdd = true) {
- const updatedMidIndices = [];
-
- for (const source of sourceMap.values()) {
- const { mediaType, msid, ssrcList, groups } = source;
- let idx;
-
- if (isAdd) {
- // For P2P, check if there is an m-line with the matching mediaType that doesn't have any ssrc lines.
- // Update the existing m-line if it exists, otherwise create a new m-line and add the sources.
- idx = this.media.findIndex(mLine => mLine.includes(`m=${mediaType}`) && !mLine.includes('a=ssrc'));
- if (!this.isP2P || idx === -1) {
- this.addMlineForNewSource(mediaType, true);
- idx = this.media.length - 1;
- }
- } else {
- idx = this.media.findIndex(mLine => mLine.includes(`a=ssrc:${ssrcList[0]}`));
-
- if (idx === -1) {
- continue; // eslint-disable-line no-continue
- }
- }
-
- updatedMidIndices.push(idx);
-
- if (isAdd) {
- ssrcList.forEach(ssrc => {
- this.media[idx] += `a=ssrc:${ssrc} msid:${msid}\r\n`;
- });
- groups?.forEach(group => {
- this.media[idx] += `a=ssrc-group:${group.semantics} ${group.ssrcs.join(' ')}\r\n`;
- });
- } else {
- ssrcList.forEach(ssrc => {
- this.media[idx] = this.media[idx].replace(new RegExp(`a=ssrc:${ssrc}.*\r\n`, 'g'), '');
- });
- groups?.forEach(group => {
- this.media[idx] = this.media[idx]
- .replace(new RegExp(`a=ssrc-group:${group.semantics}.*\r\n`, 'g'), '');
- });
-
- if (!this.isP2P) {
- // Reject the m-line so that the browser removes the associated transceiver from the list of
- // available transceivers. This will prevent the client from trying to re-use these inactive
- // transceivers when additional video sources are added to the peerconnection.
- const { media, port } = SDPUtil.parseMLine(this.media[idx].split('\r\n')[0]);
-
- this.media[idx] = this.media[idx]
- .replace(`a=${MediaDirection.SENDONLY}`, `a=${MediaDirection.INACTIVE}`);
- this.media[idx] = this.media[idx].replace(`m=${media} ${port}`, `m=${media} 0`);
- }
- }
- this.raw = this.session + this.media.join('');
- }
-
- return updatedMidIndices;
- }
-
- /**
- * Adds a new m-line to the description so that a new local or remote source can be added to the conference.
- *
- * @param {MediaType} mediaType media type of the new source that is being added.
- * @returns {void}
- */
- addMlineForNewSource(mediaType, isRemote = false) {
- const mid = this.media.length;
- const sdp = transform.parse(this.raw);
- const mline = cloneDeep(sdp.media.find(m => m.type === mediaType));
-
- // Edit media direction, mid and remove the existing ssrc lines in the m-line.
- mline.mid = mid;
- mline.direction = isRemote ? MediaDirection.SENDONLY : MediaDirection.RECVONLY;
- mline.msid = undefined;
- mline.ssrcs = undefined;
- mline.ssrcGroups = undefined;
-
- sdp.media = [ ...sdp.media, mline ];
-
- // We regenerate the BUNDLE group (since we added a new m-line).
- sdp.groups.forEach(group => {
- if (group.type === 'BUNDLE') {
- group.mids = [ ...group.mids.split(' '), mid ].join(' ');
- }
- });
-
- this.raw = transform.write(sdp);
- this._updateSessionAndMediaSections();
- }
-
- /**
- * Converts the Jingle message element to SDP.
- *
- * @param {*} jingle - The Jingle message element.
- * @returns {void}
- */
- fromJingle(jingle) {
- const sessionId = Date.now();
-
- // Use a unique session id for every TPC.
- this.raw = 'v=0\r\n'
- + `o=- ${sessionId} 2 IN IP4 0.0.0.0\r\n`
- + 's=-\r\n'
- + 't=0 0\r\n';
-
- const groups = $(jingle).find(`>group[xmlns='${XEP.BUNDLE_MEDIA}']`);
-
- if (this.isP2P && groups.length) {
- groups.each((idx, group) => {
- const contents = $(group)
- .find('>content')
- .map((_, content) => content.getAttribute('name'))
- .get();
-
- if (contents.length > 0) {
- this.raw
- += `a=group:${
- group.getAttribute('semantics')
- || group.getAttribute('type')} ${
- contents.join(' ')}\r\n`;
- }
- });
- }
-
- this.session = this.raw;
- jingle.find('>content').each((_, content) => {
- const m = this.jingle2media($(content));
-
- this.media.push(m);
- });
-
- this.raw = this.session + this.media.join('');
-
- if (this.isP2P) {
- return;
- }
-
- // For offers from Jicofo, a new m-line needs to be created for each new remote source that is added to the
- // conference.
- const newSession = transform.parse(this.raw);
- const newMedia = [];
-
- newSession.media.forEach(mLine => {
- const type = mLine.type;
-
- if (type === MediaType.APPLICATION) {
- const newMline = cloneDeep(mLine);
-
- newMline.mid = newMedia.length.toString();
- newMedia.push(newMline);
-
- return;
- }
-
- if (!mLine.ssrcs?.length) {
- const newMline = cloneDeep(mLine);
-
- newMline.mid = newMedia.length.toString();
- newMedia.push(newMline);
-
- return;
- }
-
- mLine.ssrcs.forEach((ssrc, idx) => {
- // Do nothing if the m-line with the given SSRC already exists.
- if (newMedia.some(mline => mline.ssrcs?.some(source => source.id === ssrc.id))) {
- return;
- }
- const newMline = cloneDeep(mLine);
-
- newMline.ssrcs = [];
- newMline.ssrcGroups = [];
- newMline.mid = newMedia.length.toString();
- newMline.bundleOnly = undefined;
- newMline.direction = idx ? 'sendonly' : 'sendrecv';
-
- // Add the sources and the related FID source group to the new m-line.
- const ssrcId = ssrc.id.toString();
- const group = mLine.ssrcGroups?.find(g => g.ssrcs.includes(ssrcId));
-
- if (group) {
- newMline.ssrcs.push(ssrc);
- const otherSsrc = group.ssrcs.split(' ').find(s => s !== ssrcId);
-
- if (otherSsrc) {
- const otherSource = mLine.ssrcs.find(source => source.id.toString() === otherSsrc);
-
- newMline.ssrcs.push(otherSource);
- }
- newMline.ssrcGroups.push(group);
- } else {
- newMline.ssrcs.push(ssrc);
- }
- newMedia.push(newMline);
- });
- });
-
- newSession.media = newMedia;
- const mids = [];
-
- newMedia.forEach(mLine => {
- mids.push(mLine.mid);
- });
-
- if (groups.length) {
- // We regenerate the BUNDLE group (since we regenerated the mids)
- newSession.groups = [ {
- type: 'BUNDLE',
- mids: mids.join(' ')
- } ];
- }
-
- // msid semantic
- newSession.msidSemantic = {
- semantic: 'WMS',
- token: '*'
- };
-
- // Increment the session version every time.
- newSession.origin.sessionVersion++;
-
- this.raw = transform.write(newSession);
- this._updateSessionAndMediaSections();
- }
-
- /**
- * Returns an SSRC Map by extracting SSRCs and SSRC groups from all the m-lines in the SDP.
- *
- * @returns {*}
- */
- getMediaSsrcMap() {
- const sourceInfo = new Map();
-
- this.media.forEach((mediaItem, mediaindex) => {
- const mid = SDPUtil.parseMID(SDPUtil.findLine(mediaItem, 'a=mid:'));
- const mline = SDPUtil.parseMLine(mediaItem.split('\r\n')[0]);
- const isRecvOnly = SDPUtil.findLine(mediaItem, `a=${MediaDirection.RECVONLY}`);
-
- // Do not process recvonly m-lines. Firefox generates recvonly SSRCs for all remote sources.
- if (isRecvOnly && browser.isFirefox()) {
- return;
- }
-
- const media = {
- mediaindex,
- mediaType: mline.media,
- mid,
- ssrcs: {},
- ssrcGroups: []
- };
-
- SDPUtil.findLines(mediaItem, 'a=ssrc:').forEach(line => {
- const linessrc = line.substring(7).split(' ')[0];
-
- // Allocate new ChannelSsrc.
- if (!media.ssrcs[linessrc]) {
- media.ssrcs[linessrc] = {
- ssrc: linessrc,
- lines: []
- };
- }
- media.ssrcs[linessrc].lines.push(line);
- });
-
- SDPUtil.findLines(mediaItem, 'a=ssrc-group:').forEach(line => {
- const idx = line.indexOf(' ');
- const semantics = line.substr(0, idx).substr(13);
- const ssrcs = line.substr(14 + semantics.length).split(' ');
-
- if (ssrcs.length) {
- media.ssrcGroups.push({
- semantics,
- ssrcs
- });
- }
- });
-
- sourceInfo.set(mediaindex, media);
- });
-
- return sourceInfo;
- }
-
- /**
- * Converts the content section from Jingle to a media section that can be appended to the SDP.
- *
- * @param {*} content - The content section from the Jingle message element.
- * @returns {*} - The constructed media sections.
- */
- jingle2media(content) {
- const desc = content.find('>description');
- const transport = content.find(`>transport[xmlns='${XEP.ICE_UDP_TRANSPORT}']`);
- let sdp = '';
- const sctp = transport.find(`>sctpmap[xmlns='${XEP.SCTP_DATA_CHANNEL}']`);
- const media = { media: desc.attr('media') };
-
- media.port = '9';
- if (content.attr('senders') === 'rejected') {
- media.port = '0';
- }
- if (transport.find(`>fingerprint[xmlns='${XEP.DTLS_SRTP}']`).length) {
- media.proto = sctp.length ? 'UDP/DTLS/SCTP' : 'UDP/TLS/RTP/SAVPF';
- } else {
- media.proto = 'UDP/TLS/RTP/SAVPF';
- }
- if (sctp.length) {
- sdp += `m=application ${media.port} UDP/DTLS/SCTP webrtc-datachannel\r\n`;
- sdp += `a=sctp-port:${sctp.attr('number')}\r\n`;
- sdp += 'a=max-message-size:262144\r\n';
- } else {
- media.fmt
- = desc
- .find('>payload-type')
- .map((_, payloadType) => payloadType.getAttribute('id'))
- .get();
- sdp += `${SDPUtil.buildMLine(media)}\r\n`;
- }
-
- sdp += 'c=IN IP4 0.0.0.0\r\n';
- if (!sctp.length) {
- sdp += 'a=rtcp:1 IN IP4 0.0.0.0\r\n';
- }
-
- if (transport.length) {
- if (transport.attr('ufrag')) {
- sdp += `${SDPUtil.buildICEUfrag(transport.attr('ufrag'))}\r\n`;
- }
- if (transport.attr('pwd')) {
- sdp += `${SDPUtil.buildICEPwd(transport.attr('pwd'))}\r\n`;
- }
- transport.find(`>fingerprint[xmlns='${XEP.DTLS_SRTP}']`).each((_, fingerprint) => {
- sdp += `a=fingerprint:${fingerprint.getAttribute('hash')} ${$(fingerprint).text()}\r\n`;
- if (fingerprint.hasAttribute('setup')) {
- sdp += `a=setup:${fingerprint.getAttribute('setup')}\r\n`;
- }
- });
- }
-
- transport.find('>candidate').each((_, candidate) => {
- let protocol = candidate.getAttribute('protocol');
-
- protocol = typeof protocol === 'string' ? protocol.toLowerCase() : '';
-
- if ((this.removeTcpCandidates && (protocol === 'tcp' || protocol === 'ssltcp'))
- || (this.removeUdpCandidates && protocol === 'udp')) {
- return;
- } else if (this.failICE) {
- candidate.setAttribute('ip', '1.1.1.1');
- }
-
- sdp += SDPUtil.candidateFromJingle(candidate);
- });
-
- switch (content.attr('senders')) {
- case 'initiator':
- sdp += `a=${MediaDirection.SENDONLY}\r\n`;
- break;
- case 'responder':
- sdp += `a=${MediaDirection.RECVONLY}\r\n`;
- break;
- case 'none':
- sdp += `a=${MediaDirection.INACTIVE}\r\n`;
- break;
- case 'both':
- sdp += `a=${MediaDirection.SENDRECV}\r\n`;
- break;
- }
- sdp += `a=mid:${content.attr('name')}\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) {
- sdp += 'a=rtcp-mux\r\n';
- }
-
- desc.find('>payload-type').each((_, payloadType) => {
- sdp += `${SDPUtil.buildRTPMap(payloadType)}\r\n`;
- if ($(payloadType).find('>parameter').length) {
- sdp += `a=fmtp:${payloadType.getAttribute('id')} `;
- sdp += $(payloadType)
- .find('>parameter')
- .map((__, parameter) => {
- const name = parameter.getAttribute('name');
-
- return (name ? `${name}=` : '') + parameter.getAttribute('value');
- })
- .get()
- .join(';');
- sdp += '\r\n';
- }
-
- sdp += this.rtcpFbFromJingle($(payloadType), payloadType.getAttribute('id'));
- });
-
- sdp += this.rtcpFbFromJingle(desc, '*');
-
- desc.find(`>rtp-hdrext[xmlns='${XEP.RTP_HEADER_EXTENSIONS}']`).each((_, hdrExt) => {
- sdp += `a=extmap:${hdrExt.getAttribute('id')} ${hdrExt.getAttribute('uri')}\r\n`;
- });
- if (desc.find(`>extmap-allow-mixed[xmlns='${XEP.RTP_HEADER_EXTENSIONS}']`).length > 0) {
- sdp += 'a=extmap-allow-mixed\r\n';
- }
-
- desc
- .find(`>ssrc-group[xmlns='${XEP.SOURCE_ATTRIBUTES}']`)
- .each((_, ssrcGroup) => {
- const semantics = ssrcGroup.getAttribute('semantics');
- const ssrcs
- = $(ssrcGroup)
- .find('>source')
- .map((__, source) => source.getAttribute('ssrc'))
- .get();
-
- if (ssrcs.length) {
- sdp += `a=ssrc-group:${semantics} ${ssrcs.join(' ')}\r\n`;
- }
- });
-
- let userSources = '';
- let nonUserSources = '';
-
- desc
- .find(`>source[xmlns='${XEP.SOURCE_ATTRIBUTES}']`)
- .each((_, source) => {
- const ssrc = source.getAttribute('ssrc');
- let isUserSource = true;
- let sourceStr = '';
-
- $(source)
- .find('>parameter')
- .each((__, parameter) => {
- const name = parameter.getAttribute('name');
- let value = parameter.getAttribute('value');
-
- value = SDPUtil.filterSpecialChars(value);
- sourceStr += `a=ssrc:${ssrc} ${name}`;
-
- if (value && value.length) {
- sourceStr += `:${value}`;
- }
-
- sourceStr += '\r\n';
-
- if (value?.includes('mixedmslabel')) {
- isUserSource = false;
- }
- });
-
- if (isUserSource) {
- userSources += sourceStr;
- } else {
- nonUserSources += sourceStr;
- }
- });
-
- // Append sources in the correct order, the mixedmslable m-line which has the JVB's SSRC for RTCP termination
- // is expected to be in the first m-line.
- sdp += nonUserSources + userSources;
-
- return sdp;
- }
-
- /**
- * Coverts the RTCP attributes for the session from XMPP format to SDP.
- * https://xmpp.org/extensions/xep-0293.html
- *
- * @param {*} elem - Jingle message element.
- * @param {*} payloadtype - Payload type for the codec.
- * @returns {string}
- */
- rtcpFbFromJingle(elem, payloadtype) {
- let sdp = '';
- const feedbackElementTrrInt = elem.find(`>rtcp-fb-trr-int[xmlns='${XEP.RTP_FEEDBACK}']`);
-
- if (feedbackElementTrrInt.length) {
- sdp += 'a=rtcp-fb:* trr-int ';
- sdp += feedbackElementTrrInt.attr('value') || '0';
- sdp += '\r\n';
- }
-
- const feedbackElements = elem.find(`>rtcp-fb[xmlns='${XEP.RTP_FEEDBACK}']`);
-
- feedbackElements.each((_, fb) => {
- sdp += `a=rtcp-fb:${payloadtype} ${fb.getAttribute('type')}`;
- if (fb.hasAttribute('subtype')) {
- sdp += ` ${fb.getAttribute('subtype')}`;
- }
- sdp += '\r\n';
- });
-
- return sdp;
- }
-
- /**
- * Converts the RTCP attributes for the session from SDP to XMPP format.
- * https://xmpp.org/extensions/xep-0293.html
- *
- * @param {*} mediaIndex - The index of the media section in the SDP.
- * @param {*} elem - The Jingle message element.
- * @param {*} payloadtype - payload type for the codec.
- */
- rtcpFbToJingle(mediaIndex, elem, payloadtype) {
- const lines = SDPUtil.findLines(this.media[mediaIndex], `a=rtcp-fb:${payloadtype}`);
-
- lines.forEach(line => {
- const feedback = SDPUtil.parseRTCPFB(line);
-
- if (feedback.type === 'trr-int') {
- elem.c('rtcp-fb-trr-int', {
- xmlns: XEP.RTP_FEEDBACK,
- value: feedback.params[0]
- });
- elem.up();
- } else {
- elem.c('rtcp-fb', {
- xmlns: XEP.RTP_FEEDBACK,
- type: feedback.type
- });
- if (feedback.params.length > 0) {
- elem.attrs({ 'subtype': feedback.params[0] });
- }
- elem.up();
- }
- });
- }
-
- /**
- * Converts the current SDP to a Jingle message that can be sent over the wire to a signaling server.
- *
- * @param {*} elem - The Jingle message element.
- * @param {*} thecreator - Sender role, whether it is an 'initiator' or 'responder'.
- * @returns - The updated Jingle message element.
- */
- toJingle(elem, thecreator) {
- SDPUtil.findLines(this.session, 'a=group:').forEach(line => {
- const parts = line.split(' ');
- const semantics = parts.shift().substr(8);
-
- elem.c('group', {
- xmlns: XEP.BUNDLE_MEDIA,
- semantics
- });
-
- // Bundle all the media types. Jicofo expects the 'application' media type to be signaled as 'data'.
- let mediaTypes = [ MediaType.AUDIO, MediaType.VIDEO, 'data' ];
-
- // For p2p connection, 'mid' will be used in the bundle group.
- if (this.isP2P) {
- mediaTypes = this.media.map(mediaItem => SDPUtil.parseMID(SDPUtil.findLine(mediaItem, 'a=mid:')));
- }
- mediaTypes.forEach(type => elem.c('content', { name: type }).up());
- elem.up();
- });
-
- this.media.forEach((mediaItem, i) => {
- const mline = SDPUtil.parseMLine(mediaItem.split('\r\n')[0]);
- const mediaType = mline.media === MediaType.APPLICATION ? 'data' : mline.media;
-
- let ssrc = false;
- const assrcline = SDPUtil.findLine(mediaItem, 'a=ssrc:');
- const isRecvOnly = SDPUtil.findLine(mediaItem, `a=${MediaDirection.RECVONLY}`);
-
- if (assrcline) {
- ssrc = assrcline.substring(7).split(' ')[0];
- }
-
- const contents = $(elem.tree()).find(`content[name='${mediaType}']`);
-
- // Append source groups from the new m-lines to the existing media description. The SDP will have multiple
- // m-lines for audio and video including the recv-only ones for remote sources but there needs to be only
- // one media description for a given media type that should include all the sources, i.e., both the camera
- // and screenshare sources should be added to the 'video' description.
- for (const content of contents) {
- if (!content.hasAttribute('creator')) {
- // eslint-disable-next-line no-continue
- continue;
- }
-
- if (ssrc && !(isRecvOnly && browser.isFirefox())) {
- const description = $(content).find('description');
- const ssrcMap = SDPUtil.parseSSRC(mediaItem);
-
- for (const [ availableSsrc, ssrcParameters ] of ssrcMap) {
- const sourceName = SDPUtil.parseSourceNameLine(ssrcParameters);
- const videoType = SDPUtil.parseVideoTypeLine(ssrcParameters);
- const source = Strophe.xmlElement('source', {
- ssrc: availableSsrc,
- name: sourceName,
- videoType,
- xmlns: XEP.SOURCE_ATTRIBUTES
- });
-
- const msid = SDPUtil.parseMSIDAttribute(ssrcParameters);
-
- if (msid) {
- const param = Strophe.xmlElement('parameter', {
- name: 'msid',
- value: msid
- });
-
- source.append(param);
- }
- description.append(source);
- }
-
- const ssrcGroupLines = SDPUtil.findLines(mediaItem, 'a=ssrc-group:');
-
- ssrcGroupLines.forEach(line => {
- const { semantics, ssrcs } = SDPUtil.parseSSRCGroupLine(line);
-
- if (ssrcs.length) {
- const group = Strophe.xmlElement('ssrc-group', {
- semantics,
- xmlns: XEP.SOURCE_ATTRIBUTES
- });
-
- for (const val of ssrcs) {
- const src = Strophe.xmlElement('source', {
- ssrc: val
- });
-
- group.append(src);
- }
- description.append(group);
- }
- });
- }
-
- return;
- }
- const mid = SDPUtil.parseMID(SDPUtil.findLine(mediaItem, 'a=mid:'));
-
- elem.c('content', {
- creator: thecreator,
- name: this.isP2P ? mid : mediaType
- });
-
- if (mediaType === MediaType.VIDEO && typeof this.initialLastN === 'number') {
- elem.c('initial-last-n', {
- xmlns: 'jitsi:colibri2',
- value: this.initialLastN
- }).up();
- }
-
- if ([ MediaType.AUDIO, MediaType.VIDEO ].includes(mediaType)) {
- elem.c('description', {
- xmlns: XEP.RTP_MEDIA,
- media: mediaType
- });
-
- mline.fmt.forEach(format => {
- const rtpmap = SDPUtil.findLine(mediaItem, `a=rtpmap:${format}`);
-
- elem.c('payload-type', SDPUtil.parseRTPMap(rtpmap));
-
- const afmtpline = SDPUtil.findLine(mediaItem, `a=fmtp:${format}`);
-
- if (afmtpline) {
- const fmtpParameters = SDPUtil.parseFmtp(afmtpline);
-
- fmtpParameters.forEach(param => elem.c('parameter', param).up());
- }
-
- this.rtcpFbToJingle(i, elem, format);
- elem.up();
- });
-
- if (ssrc && !(isRecvOnly && browser.isFirefox())) {
- const ssrcMap = SDPUtil.parseSSRC(mediaItem);
-
- for (const [ availableSsrc, ssrcParameters ] of ssrcMap) {
- const sourceName = SDPUtil.parseSourceNameLine(ssrcParameters);
- const videoType = SDPUtil.parseVideoTypeLine(ssrcParameters);
-
- elem.c('source', {
- ssrc: availableSsrc,
- name: sourceName,
- videoType,
- xmlns: XEP.SOURCE_ATTRIBUTES
- });
-
- const msid = SDPUtil.parseMSIDAttribute(ssrcParameters);
-
- if (msid) {
- elem.c('parameter').attrs({
- name: 'msid',
- value: msid
- });
- elem.up();
- }
-
- elem.up();
- }
-
- const ssrcGroupLines = SDPUtil.findLines(mediaItem, 'a=ssrc-group:');
-
- ssrcGroupLines.forEach(line => {
- const { semantics, ssrcs } = SDPUtil.parseSSRCGroupLine(line);
-
- if (ssrcs.length) {
- elem.c('ssrc-group', {
- semantics,
- xmlns: XEP.SOURCE_ATTRIBUTES
- });
- ssrcs.forEach(s => elem.c('source', { ssrc: s }).up());
- elem.up();
- }
- });
- }
-
- const ridLines = SDPUtil.findLines(mediaItem, 'a=rid:');
-
- if (ridLines.length && browser.usesRidsForSimulcast()) {
- // Map a line which looks like "a=rid:2 send" to just the rid ("2").
- const rids = ridLines.map(ridLine => ridLine.split(':')[1].split(' ')[0]);
-
- rids.forEach(rid => {
- elem.c('source', {
- rid,
- xmlns: XEP.SOURCE_ATTRIBUTES
- });
- elem.up();
- });
-
- const unifiedSimulcast = SDPUtil.findLine(mediaItem, 'a=simulcast:');
-
- if (unifiedSimulcast) {
- elem.c('rid-group', {
- semantics: SSRC_GROUP_SEMANTICS.SIM,
- xmlns: XEP.SOURCE_ATTRIBUTES
- });
- rids.forEach(rid => elem.c('source', { rid }).up());
- elem.up();
- }
- }
-
- if (SDPUtil.findLine(mediaItem, 'a=rtcp-mux')) {
- elem.c('rtcp-mux').up();
- }
-
- this.rtcpFbToJingle(i, elem, '*');
-
- const extmapLines = SDPUtil.findLines(mediaItem, 'a=extmap:', this.session);
-
- extmapLines.forEach(extmapLine => {
- const extmap = SDPUtil.parseExtmap(extmapLine);
-
- elem.c('rtp-hdrext', {
- xmlns: XEP.RTP_HEADER_EXTENSIONS,
- uri: extmap.uri,
- id: extmap.value
- });
-
- if (extmap.hasOwnProperty('direction')) {
- switch (extmap.direction) {
- case MediaDirection.SENDONLY:
- elem.attrs({ senders: 'responder' });
- break;
- case MediaDirection.RECVONLY:
- elem.attrs({ senders: 'initiator' });
- break;
- case MediaDirection.SENDRECV:
- elem.attrs({ senders: 'both' });
- break;
- case MediaDirection.INACTIVE:
- elem.attrs({ senders: 'none' });
- break;
- }
- }
-
- elem.up();
- });
-
- if (SDPUtil.findLine(mediaItem, 'a=extmap-allow-mixed', this.session)) {
- elem.c('extmap-allow-mixed', {
- xmlns: XEP.RTP_HEADER_EXTENSIONS
- });
- elem.up();
- }
- elem.up(); // end of description
- }
-
- // Map ice-ufrag/pwd, dtls fingerprint, candidates.
- this.transportToJingle(i, elem);
-
- // Set senders attribute based on media direction
- if (SDPUtil.findLine(mediaItem, `a=${MediaDirection.SENDRECV}`)) {
- elem.attrs({ senders: 'both' });
- } else if (SDPUtil.findLine(mediaItem, `a=${MediaDirection.SENDONLY}`)) {
- elem.attrs({ senders: 'initiator' });
- } else if (SDPUtil.findLine(mediaItem, `a=${MediaDirection.RECVONLY}`)) {
- elem.attrs({ senders: 'responder' });
- } else if (SDPUtil.findLine(mediaItem, `a=${MediaDirection.INACTIVE}`)) {
- elem.attrs({ senders: 'none' });
- }
-
- // Reject an m-line only when port is 0 and a=bundle-only is not present in the section.
- // The port is automatically set to 0 when bundle-only is used.
- if (mline.port === '0' && !SDPUtil.findLine(mediaItem, 'a=bundle-only', this.session)) {
- elem.attrs({ senders: 'rejected' });
- }
- elem.up(); // end of content
- });
- elem.up();
-
- return elem;
- }
-
- /**
- * Converts the session transport information from SDP to XMPP format.
- *
- * @param {*} mediaIndex The index for the m-line in the SDP.
- * @param {*} elem The transport element.
- */
- transportToJingle(mediaIndex, elem) {
- elem.c('transport');
-
- const sctpport = SDPUtil.findLine(this.media[mediaIndex], 'a=sctp-port:', this.session);
- const sctpmap = SDPUtil.findLine(this.media[mediaIndex], 'a=sctpmap:', this.session);
-
- if (sctpport) {
- const sctpAttrs = SDPUtil.parseSCTPPort(sctpport);
-
- elem.c('sctpmap', {
- xmlns: XEP.SCTP_DATA_CHANNEL,
- number: sctpAttrs, // SCTP port
- protocol: 'webrtc-datachannel' // protocol
- });
-
- // The parser currently requires streams to be present.
- elem.attrs({ streams: 0 });
- elem.up();
- } else if (sctpmap) {
- const sctpAttrs = SDPUtil.parseSCTPMap(sctpmap);
-
- elem.c('sctpmap', {
- xmlns: XEP.SCTP_DATA_CHANNEL,
- number: sctpAttrs[0], // SCTP port
- protocol: sctpAttrs[1] // protocol
- });
-
- // Optional stream count attribute.
- elem.attrs({ streams: sctpAttrs.length > 2 ? sctpAttrs[2] : 0 });
- elem.up();
- }
-
- const fingerprints = SDPUtil.findLines(this.media[mediaIndex], 'a=fingerprint:', this.session);
-
- fingerprints.forEach(line => {
- const fingerprint = SDPUtil.parseFingerprint(line);
-
- fingerprint.xmlns = XEP.DTLS_SRTP;
-
- elem.c('fingerprint').t(fingerprint.fingerprint);
- delete fingerprint.fingerprint;
-
- const setupLine = SDPUtil.findLine(this.media[mediaIndex], 'a=setup:', this.session);
-
- if (setupLine) {
- fingerprint.setup = setupLine.substr(8);
- }
- elem.attrs(fingerprint);
- elem.up(); // end of fingerprint
- });
-
- const iceParameters = SDPUtil.iceparams(this.media[mediaIndex], this.session);
-
- if (iceParameters) {
- iceParameters.xmlns = XEP.ICE_UDP_TRANSPORT;
- elem.attrs(iceParameters);
-
- const candidateLines = SDPUtil.findLines(this.media[mediaIndex], 'a=candidate:', this.session);
-
- candidateLines.forEach(line => { // add any a=candidate lines
- const candidate = SDPUtil.candidateToJingle(line);
-
- if (this.failICE) {
- candidate.ip = '1.1.1.1';
- }
-
- const protocol = candidate && typeof candidate.protocol === 'string'
- ? candidate.protocol.toLowerCase() : '';
-
- if ((this.removeTcpCandidates && (protocol === 'tcp' || protocol === 'ssltcp'))
- || (this.removeUdpCandidates && protocol === 'udp')) {
- return;
- }
- elem.c('candidate', candidate).up();
- });
- }
- elem.up(); // end of transport
- }
- }
|