Adds an SDP transform module.

modules/transform/transform.js

@@ -0,0 +1,97 @@
+var transform = require('sdp-transform');
+
+exports.write = function(session, opts) {
+
+    if (typeof session !== 'undefined' &&
+        typeof session.media !== 'undefined' &&
+        Array.isArray(session.media)) {
+
+        session.media.forEach(function (mLine) {
+            // expand sources to ssrcs
+            if (typeof mLine.sources !== 'undefined' &&
+                Object.keys(mLine.sources).length !== 0) {
+                mLine.ssrcs = [];
+                Object.keys(mLine.sources).forEach(function (ssrc) {
+                    var source = mLine.sources[ssrc];
+                    Object.keys(source).forEach(function (attribute) {
+                        mLine.ssrcs.push({
+                            id: ssrc,
+                            attribute: attribute,
+                            value: source[attribute]
+                        });
+                    });
+                });
+                delete mLine.sources;
+            }
+
+            // join ssrcs in ssrc groups
+            if (typeof mLine.ssrcGroups !== 'undefined' &&
+                Array.isArray(mLine.ssrcGroups)) {
+                mLine.ssrcGroups.forEach(function (ssrcGroup) {
+                    if (typeof ssrcGroup.ssrcs !== 'undefined' &&
+                        Array.isArray(ssrcGroup.ssrcs)) {
+                        ssrcGroup.ssrcs = ssrcGroup.ssrcs.join(' ');
+                    }
+                });
+            }
+        });
+    }
+
+    // join group mids
+    if (typeof session !== 'undefined' &&
+        typeof session.groups !== 'undefined' && Array.isArray(session.groups)) {
+
+        session.groups.forEach(function (g) {
+            if (typeof g.mids !== 'undefined' && Array.isArray(g.mids)) {
+                g.mids = g.mids.join(' ');
+            }
+        });
+    }
+
+    return transform.write(session, opts);
+};
+
+exports.parse = function(sdp) {
+    var session = transform.parse(sdp);
+
+    if (typeof session !== 'undefined' && typeof session.media !== 'undefined' &&
+        Array.isArray(session.media)) {
+
+        session.media.forEach(function (mLine) {
+            // group sources attributes by ssrc
+            if (typeof mLine.ssrcs !== 'undefined' && Array.isArray(mLine.ssrcs)) {
+                mLine.sources = {};
+                mLine.ssrcs.forEach(function (ssrc) {
+                    if (!mLine.sources[ssrc.id])
+                        mLine.sources[ssrc.id] = {};
+                    mLine.sources[ssrc.id][ssrc.attribute] = ssrc.value;
+                });
+
+                delete mLine.ssrcs;
+            }
+
+            // split ssrcs in ssrc groups
+            if (typeof mLine.ssrcGroups !== 'undefined' &&
+                Array.isArray(mLine.ssrcGroups)) {
+                mLine.ssrcGroups.forEach(function (ssrcGroup) {
+                    if (typeof ssrcGroup.ssrcs === 'string') {
+                        ssrcGroup.ssrcs = ssrcGroup.ssrcs.split(' ');
+                    }
+                });
+            }
+        });
+    }
+    // split group mids
+    if (typeof session !== 'undefined' &&
+        typeof session.groups !== 'undefined' && Array.isArray(session.groups)) {
+
+        session.groups.forEach(function (g) {
+            if (typeof g.mids === 'string') {
+                g.mids = g.mids.split(' ');
+            }
+        });
+    }
+
+    return session;
+};
+

package.json

@@ -18,7 +18,8 @@
       "events": "*",
       "pako": "*",
       "i18next-client": "1.7.7",
-      "sdp-interop": "jitsi/sdp-interop#f65fedfe57a"
+      "sdp-interop": "jitsi/sdp-interop#f65fedfe57a",
+      "sdp-transform": "1.3.0"
   },
   "devDependencies": {
   },