Fix multiple publications/subscriptions on single pc issue (#790)

Author: starwarfan

scripts/patches/licode/0021-Allow-SDP-info-re-init.patch

@@ -0,0 +1,34 @@
+From 7e4adc0f7898925ee37dfd19da21aed5d854b38e Mon Sep 17 00:00:00 2001
+From: Chen Li1 <li1.chen@intel.com>
+Date: Tue, 22 Dec 2020 16:55:51 +0800
+Subject: [PATCH] Allow SDP info re-init
+
+---
+ erizo/src/erizo/SdpInfo.cpp | 10 ++++++++++
+ 1 file changed, 10 insertions(+)
+
+diff --git a/erizo/src/erizo/SdpInfo.cpp b/erizo/src/erizo/SdpInfo.cpp
+index 4e13951..6b23522 100644
+--- a/erizo/src/erizo/SdpInfo.cpp
++++ b/erizo/src/erizo/SdpInfo.cpp
+@@ -69,7 +69,17 @@ namespace erizo {
+   }
+ 
+   bool SdpInfo::initWithSdp(const std::string& sdp, const std::string& media) {
++    inOutPTMap.clear();
++    outInPTMap.clear();
++    payloadVector.clear();
++    bundleTags.clear();
++    extMapVector.clear();
++    candidateVector_.clear();
++    cryptoVector_.clear();
++    payload_parsed_map_.clear();
++    supported_ext_map_.clear();
+     rids_.clear();
++    parsed_order_map.clear();
+     return processSdp(sdp, media);
+   }
+   std::string SdpInfo::addCandidate(const CandidateInfo& info) {
+-- 
+2.7.4
+

source/agent/webrtc/sdpInfo.js

@@ -315,6 +315,7 @@ class SdpInfo {
   singleMediaSdp(mid) {
     const sdp = new SdpInfo(this.toString());
     sdp.obj.media = sdp.obj.media.filter(m => m.mid.toString() === mid);
+    sdp.setBundleMids([mid]);
     return sdp;
   }