Inform jitter buffer about FlexFEC protection.

webrtc/video/video_receive_stream.h

Index: webrtc/video/video_receive_stream.h
diff --git a/webrtc/video/video_receive_stream.h b/webrtc/video/video_receive_stream.h
index ab9fe4ea7bb5f6fb23bdcd6cb118c497e2518c75..301888db90d0c23518db00aedf957c2231e33733 100644
--- a/webrtc/video/video_receive_stream.h
+++ b/webrtc/video/video_receive_stream.h
@@ -31,6 +31,7 @@ namespace webrtc {
 
 class CallStats;
 class CongestionController;
+class FlexfecProtectionMediator;
 class IvfFileWriter;
 class ProcessThread;
 class RTPFragmentationHeader;
@@ -55,7 +56,8 @@ class VideoReceiveStream : public webrtc::VideoReceiveStream,
                      webrtc::VoiceEngine* voice_engine,
                      ProcessThread* process_thread,
                      CallStats* call_stats,
-                     VieRemb* remb);
+                     VieRemb* remb,
+                     FlexfecProtectionMediator* flexfec_protection_mediator);
   ~VideoReceiveStream() override;
 
   void SignalNetworkState(NetworkState state);
@@ -107,6 +109,13 @@ class VideoReceiveStream : public webrtc::VideoReceiveStream,
   static bool DecodeThreadFunction(void* ptr);
   void Decode();
 

[brandtr, 2017/01/24 13:02:49]

The methods below are not strictly needed, but I thought it made sense to
declare these here to clarify the assumptions around their usage.

+  // The return value of this method depends on what FlexfecReceiveStreams are
+  // registered in Call, which might change during the lifetime of |this|.
+  bool IsFlexfecEnabled() const;
+
+  // The return value of this method is constant during the lifetime of |this|.
+  bool IsUlpfecEnabled() const;
+
   TransportAdapter transport_adapter_;
   const VideoReceiveStream::Config config_;
   const int num_cpu_cores_;
@@ -117,6 +126,7 @@ class VideoReceiveStream : public webrtc::VideoReceiveStream,
 
   CongestionController* const congestion_controller_;
   CallStats* const call_stats_;
+  FlexfecProtectionMediator* const flexfec_protection_mediator_;
 
   std::unique_ptr<VCMTiming> timing_;  // Jitter buffer experiment.
   vcm::VideoReceiver video_receiver_;