Feature/producer transceiver inactive on pause

include/Handler.hpp

@@ -112,6 +112,8 @@ namespace mediasoupclient
 		nlohmann::json GetSenderStats(const std::string& localId);
 		void RestartIce(const nlohmann::json& iceParameters) override;
 		DataChannel SendDataChannel(const std::string& label, webrtc::DataChannelInit dataChannelInit);
+		void PauseSending(const std::string& localId);
+		void ResumeSending(const std::string& localId);
 
 	private:
 		// Generic sending RTP parameters for audio and video.

include/Producer.hpp

@@ -23,6 +23,8 @@ namespace mediasoupclient
 			  const Producer* producer, webrtc::MediaStreamTrackInterface* newTrack)             = 0;
 			virtual void OnSetMaxSpatialLayer(const Producer* producer, uint8_t maxSpatialLayer) = 0;
 			virtual nlohmann::json OnGetStats(const Producer* producer)                          = 0;
+			virtual void OnPause(Producer* producer)                                             = 0;
+			virtual void OnResume(Producer* producer)                                            = 0;
 		};
 
 		/* Public Listener API */

include/Transport.hpp

@@ -157,6 +157,8 @@ namespace mediasoupclient
 		void OnReplaceTrack(const Producer* producer, webrtc::MediaStreamTrackInterface* track) override;
 		void OnSetMaxSpatialLayer(const Producer* producer, uint8_t maxSpatialLayer) override;
 		nlohmann::json OnGetStats(const Producer* producer) override;
+		void OnPause(Producer* producer);
+		void OnResume(Producer* producer);
 
 	private:
 		// Listener instance.

src/Handler.cpp

@@ -619,6 +619,53 @@ namespace mediasoupclient
 		this->pc->SetRemoteDescription(PeerConnection::SdpType::ANSWER, answer);
 	}
 
+	void SendHandler::PauseSending(const std::string& localId) 
+	{
+        MSC_DEBUG("[localId:%s]", localId.c_str());
+
+        auto locaIdIt = this->mapMidTransceiver.find(localId);
+
+        if (locaIdIt == this->mapMidTransceiver.end())
+			MSC_THROW_ERROR("associated RtpTransceiver not found");
+
+        auto* transceiver = locaIdIt->second;
+
+        transceiver->SetDirectionWithError(webrtc::RtpTransceiverDirection::kInactive);
+		webrtc::PeerConnectionInterface::RTCOfferAnswerOptions options;
+        std::string offer = this->pc->CreateOffer(options);
+
+        MSC_DEBUG("calling pc.setLocalDescription() [offer:%s]", offer.c_str());
+
+        this->pc->SetLocalDescription(PeerConnection::SdpType::OFFER, offer);
+
+        auto sdpAnswer = this->remoteSdp->GetSdp();
+        MSC_DEBUG("calling pc.setRemoteDescription() [answer:%s]", sdpAnswer.c_str());
+        this->pc->SetRemoteDescription(PeerConnection::SdpType::ANSWER, sdpAnswer);
+    }
+
+    void SendHandler::ResumeSending(const std::string& localId) 
+	{
+        MSC_DEBUG("resumeSending() [localId:%s]", localId.c_str());
+
+        auto locaIdIt = this->mapMidTransceiver.find(localId);
+
+        if (locaIdIt == this->mapMidTransceiver.end())
+        	MSC_THROW_ERROR("associated RtpTransceiver not found");
+
+        auto* transceiver = locaIdIt->second;
+
+        transceiver->SetDirectionWithError(webrtc::RtpTransceiverDirection::kSendOnly);
+		webrtc::PeerConnectionInterface::RTCOfferAnswerOptions options;
+        std::string offer = this->pc->CreateOffer(options);
+
+        MSC_DEBUG("calling pc.setLocalDescription() [offer:%s]", offer.c_str());
+        this->pc->SetLocalDescription(PeerConnection::SdpType::OFFER, offer);
+
+        auto sdpAnswer = this->remoteSdp->GetSdp();
+        MSC_DEBUG("calling pc.setRemoteDescription() [answer:%s]", sdpAnswer.c_str());
+        this->pc->SetRemoteDescription(PeerConnection::SdpType::ANSWER, sdpAnswer);
+    }
+
 	/* RecvHandler methods */
 
 	RecvHandler::RecvHandler(

src/Producer.cpp

@@ -131,6 +131,8 @@ namespace mediasoupclient
 		}
 
 		this->track->set_enabled(false);
+
+		this->privateListener->OnPause(this);
 	}
 
 	/**
@@ -148,6 +150,8 @@ namespace mediasoupclient
 		}
 
 		this->track->set_enabled(true);
+
+		this->privateListener->OnResume(this);
 	}
 
 	/**

src/Transport.cpp

@@ -369,6 +369,20 @@ namespace mediasoupclient
 		return this->sendHandler->GetSenderStats(producer->GetLocalId());
 	}
 
+	void SendTransport::OnPause(Producer* producer) 
+	{
+		MSC_TRACE();
+
+		this->sendHandler->PauseSending(producer->GetLocalId());
+	}
+
+	void SendTransport::OnResume(Producer* producer) 
+	{
+		MSC_TRACE();
+
+		this->sendHandler->ResumeSending(producer->GetLocalId());
+	}
+
 	/* RecvTransport */
 
 	RecvTransport::RecvTransport(