From 932af962b2bd38eaf9bb58a54cf9848456c0c64d Mon Sep 17 00:00:00 2001
From: Boris Grozev <boris@jitsi.org>
Date: Thu, 29 Oct 2015 16:40:59 -0500
Subject: [PATCH] Adds an option to advertise our SSRCs in presence to the MUC
 (as well as Jingle) for backward compatibility with jirecon. Partially
 reverts a1b0677442e04c12f275431be380f06a8f4a3959

---
 modules/xmpp/JingleSessionPC.js | 18 +++++++++++++
 modules/xmpp/strophe.emuc.js    | 45 +++++++++++++++++++++++++++++++++
 2 files changed, 63 insertions(+)

diff --git a/modules/xmpp/JingleSessionPC.js b/modules/xmpp/JingleSessionPC.js
index 6fa0fcdf7..6253096d8 100644
--- a/modules/xmpp/JingleSessionPC.js
+++ b/modules/xmpp/JingleSessionPC.js
@@ -1406,10 +1406,28 @@ JingleSessionPC.prototype.setLocalDescription = function () {
 
     // Bind us as local SSRCs owner
     if (newssrcs.length > 0) {
+
+        if (config.advertiseSSRCsInPresence) {
+            // This is only for backward compatibility with clients which
+            // don't support getting sources from Jingle (i.e. jirecon).
+            this.connection.emuc.clearPresenceMedia();
+        }
+
         for (i = 0; i < newssrcs.length; i++) {
             var ssrc = newssrcs[i].ssrc;
             var myJid = self.connection.emuc.myroomjid;
             self.ssrcOwners[ssrc] = myJid;
+
+            if (config.advertiseSSRCsInPresence) {
+                // This is only for backward compatibility with clients which
+                // don't support getting sources from Jingle (i.e. jirecon).
+                this.connection.emuc.addMediaToPresence(
+                    i+1, newssrcs[i].type, ssrc, newssrcs[i].direction);
+            }
+        }
+
+        if (config.advertiseSSRCsInPresence) {
+            this.connection.emuc.sendPresence();
         }
     }
 };
diff --git a/modules/xmpp/strophe.emuc.js b/modules/xmpp/strophe.emuc.js
index b37918e0d..2b83c049b 100644
--- a/modules/xmpp/strophe.emuc.js
+++ b/modules/xmpp/strophe.emuc.js
@@ -529,6 +529,31 @@ module.exports = function(XMPP, eventEmitter) {
                     .c('current').t(this.presMap['prezicurrent']).up().up();
             }
 
+            // This is only for backward compatibility with clients which
+            // don't support getting sources from Jingle (i.e. jirecon).
+            if (this.presMap['medians']) {
+                pres.c('media', {xmlns: this.presMap['medians']});
+                var sourceNumber = 0;
+                Object.keys(this.presMap).forEach(function (key) {
+                    if (key.indexOf('source') >= 0) {
+                        sourceNumber++;
+                    }
+                });
+                if (sourceNumber > 0) {
+                    for (var i = 1; i <= sourceNumber / 3; i++) {
+                        pres.c('source',
+                            {
+                                type: this.presMap['source' + i + '_type'],
+                                ssrc: this.presMap['source' + i + '_ssrc'],
+                                direction: this.presMap['source' + i + '_direction']
+                                || 'sendrecv'
+                            }
+                        ).up();
+                    }
+                }
+                pres.up();
+            }
+
             if(this.presMap["startMuted"] !== undefined)
             {
                 pres.c("startmuted", {audio: this.presMap["startMuted"].audio,
@@ -543,6 +568,26 @@ module.exports = function(XMPP, eventEmitter) {
         addDisplayNameToPresence: function (displayName) {
             this.presMap['displayName'] = displayName;
         },
+        // This is only for backward compatibility with clients which
+        // don't support getting sources from Jingle (i.e. jirecon).
+        addMediaToPresence: function (sourceNumber, mtype, ssrcs, direction) {
+            if (!this.presMap['medians'])
+                this.presMap['medians'] = 'http://estos.de/ns/mjs';
+
+            this.presMap['source' + sourceNumber + '_type'] = mtype;
+            this.presMap['source' + sourceNumber + '_ssrc'] = ssrcs;
+            this.presMap['source' + sourceNumber + '_direction'] = direction;
+        },
+        // This is only for backward compatibility with clients which
+        // don't support getting sources from Jingle (i.e. jirecon).
+        clearPresenceMedia: function () {
+            var self = this;
+            Object.keys(this.presMap).forEach(function (key) {
+                if (key.indexOf('source') != -1) {
+                    delete self.presMap[key];
+                }
+            });
+        },
         addDevicesToPresence: function (devices) {
             this.presMap['devices'] = devices;
         },