From 1c2d735b3d62e519b3be094b9ad0149e544d0505 Mon Sep 17 00:00:00 2001
From: Nathan Oehlman <nathan.oehlman@gmail.com>
Date: Mon, 29 Feb 2016 15:44:53 +1000
Subject: [PATCH] Uses the Jitsi sdp-interop module for interop. Requires the
 changes in https://github.com/jitsi/sdp-interop/compare/issue-13

---
 index.js     | 21 +++++++++++++++++----
 package.json |  3 ++-
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/index.js b/index.js
index 6312e64..d09cc48 100644
--- a/index.js
+++ b/index.js
@@ -2,6 +2,7 @@ var detect = require('rtc-core/detect');
 var findPlugin = require('rtc-core/plugin');
 var PriorityQueue = require('priorityqueuejs');
 var Promise = require('es6-promise').Promise;
+var Interop = require('sdp-interop').Interop;
 var pluck = require('whisk/pluck');
 var pluckSessionDesc = pluck('sdp', 'type');
 
@@ -89,6 +90,8 @@ module.exports = function(pc, opts) {
   var RTCIceCandidate = (opts || {}).RTCIceCandidate ||
     detect('RTCIceCandidate');
 
+  var interop = navigator.mozGetUserMedia && new Interop();
+
   // Determine plugin overridable methods
   var createIceCandidate = pluggable(plugin && plugin.createIceCandidate, function(data) {
     return new RTCIceCandidate(data);
@@ -199,6 +202,16 @@ module.exports = function(pc, opts) {
     return desc;
   }
 
+  function prepareDescription(desc) {
+    if (!interop || !desc || !desc.sdp) return desc;
+    return interop.toUnifiedPlan(desc);
+  }
+
+  function setLocalDescription(desc) {
+    if (interop) desc = interop.toPlanB(desc);
+    tq.setLocalDescription(desc);
+  }
+
   function completeConnection() {
     // Clean any cached media types now that we have potentially new remote description
     if (pc.__mediaIDs || pc.__mediaTypes) {
@@ -445,22 +458,22 @@ module.exports = function(pc, opts) {
   });
 
   tq.setLocalDescription = enqueue('setLocalDescription', execMethod, {
-    processArgs: cleansdp,
+    processArgs: cleansdp, prepareDescription,
     pass: emitSdp
   });
 
   tq.setRemoteDescription = enqueue('setRemoteDescription', execMethod, {
-    processArgs: createSessionDescription,
+    processArgs: createSessionDescription, prepareDescription,
     pass: completeConnection
   });
 
   tq.createOffer = enqueue('createOffer', execMethod, {
     checks: [ isNotNegotiating ],
-    pass: tq.setLocalDescription
+    pass: setLocalDescription
   });
 
   tq.createAnswer = enqueue('createAnswer', execMethod, {
-    pass: tq.setLocalDescription
+    pass: setLocalDescription
   });
 
   return tq;
diff --git a/package.json b/package.json
index 61192e6..55ee941 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,7 @@
     "rtc-sdp": "^1.2.0",
     "rtc-sdpclean": "^1.0.0",
     "rtc-validator": "^1.0.0",
+    "sdp-interop": "^0.1.11",
     "whisk": "^1.1.0"
   },
   "devDependencies": {
@@ -51,4 +52,4 @@
   "testling": {
     "files": "test/all.js"
   }
-}
\ No newline at end of file
+}