Send ICE candidates gathered after timeout

src/CallManager.cpp

@@ -15,6 +15,7 @@
 #include "dialogs/AcceptCall.h"
 
 Q_DECLARE_METATYPE(std::vector<mtx::events::msg::CallCandidates::Candidate>)
+Q_DECLARE_METATYPE(mtx::events::msg::CallCandidates::Candidate)
 Q_DECLARE_METATYPE(mtx::responses::TurnServer)
 
 using namespace mtx::events;
@@ -30,11 +31,12 @@ CallManager::CallManager(QSharedPointer<UserSettings> userSettings)
     settings_(userSettings)
 {
   qRegisterMetaType<std::vector<mtx::events::msg::CallCandidates::Candidate>>();
+  qRegisterMetaType<mtx::events::msg::CallCandidates::Candidate>();
   qRegisterMetaType<mtx::responses::TurnServer>();
 
   connect(&session_, &WebRTCSession::offerCreated, this,
       [this](const std::string &sdp,
-             const std::vector<mtx::events::msg::CallCandidates::Candidate>& candidates)
+             const std::vector<CallCandidates::Candidate> &candidates)
             {
               nhlog::ui()->debug("Offer created with callid_ and roomid_: {} {}", callid_, roomid_.toStdString());
               emit newMessage(roomid_, CallInvite{callid_, sdp, 0, timeoutms_});
@@ -43,13 +45,20 @@ CallManager::CallManager(QSharedPointer<UserSettings> userSettings)
 
   connect(&session_, &WebRTCSession::answerCreated, this,
       [this](const std::string &sdp,
-             const std::vector<mtx::events::msg::CallCandidates::Candidate>& candidates)
+             const std::vector<CallCandidates::Candidate> &candidates)
             {
               nhlog::ui()->debug("Answer created with callid_ and roomid_: {} {}", callid_, roomid_.toStdString());
               emit newMessage(roomid_, CallAnswer{callid_, sdp, 0});
               emit newMessage(roomid_, CallCandidates{callid_, candidates, 0});
             });
 
+  connect(&session_, &WebRTCSession::newICECandidate, this,
+      [this](const CallCandidates::Candidate &candidate)
+            {
+              nhlog::ui()->debug("New ICE candidate created with callid_ and roomid_: {} {}", callid_, roomid_.toStdString());
+              emit newMessage(roomid_, CallCandidates{callid_, {candidate}, 0});
+            });
+
   connect(&turnServerTimer_, &QTimer::timeout, this, &CallManager::retrieveTurnServer);
   turnServerTimer_.start(2000);
 

src/WebRTCSession.cpp

@@ -358,6 +358,11 @@ setLocalDescription(GstPromise *promise, gpointer webrtc)
 void
 addLocalICECandidate(GstElement *webrtc G_GNUC_UNUSED, guint mlineIndex, gchar *candidate, gpointer G_GNUC_UNUSED)
 {
+  if (WebRTCSession::instance().state() == WebRTCSession::State::CONNECTED) {
+    emit WebRTCSession::instance().newICECandidate({"audio", (uint16_t)mlineIndex, candidate});
+    return;
+  }
+
   gcandidates.push_back({"audio", (uint16_t)mlineIndex, candidate});
 
   // GStreamer v1.16: webrtcbin's notify::ice-gathering-state triggers GST_WEBRTC_ICE_GATHERING_STATE_COMPLETE too early

src/WebRTCSession.h

@@ -46,6 +46,7 @@ public:
 signals:
         void offerCreated(const std::string &sdp, const std::vector<mtx::events::msg::CallCandidates::Candidate>&);
         void answerCreated(const std::string &sdp, const std::vector<mtx::events::msg::CallCandidates::Candidate>&);
+        void newICECandidate(const mtx::events::msg::CallCandidates::Candidate&);
         void stateChanged(WebRTCSession::State); // explicit qualifier necessary for Qt
 
 private slots: