Inform jitter buffer about FlexFEC protection.

webrtc/call/call.cc

Index: webrtc/call/call.cc
diff --git a/webrtc/call/call.cc b/webrtc/call/call.cc
index 48072d0a0b71790bf2802289cef4324abdaaabe1..b5a1268ed6c3284364fcad66378645b7a3a3be88 100644
--- a/webrtc/call/call.cc
+++ b/webrtc/call/call.cc
@@ -8,7 +8,9 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include <stdint.h>
 #include <string.h>
+
 #include <algorithm>
 #include <map>
 #include <memory>
@@ -66,6 +68,7 @@ namespace internal {
 class Call : public webrtc::Call,
              public PacketReceiver,
              public RecoveredPacketReceiver,
+             public FlexfecProtectionMediator,
              public CongestionController::Observer,
              public BitrateAllocator::LimitObserver {
  public:
@@ -110,6 +113,9 @@ class Call : public webrtc::Call,
   // Implements RecoveredPacketReceiver.
   bool OnRecoveredPacket(const uint8_t* packet, size_t length) override;
 
+  // Implements FlexfecProtectionMediator.
+  bool IsProtectedByFlexfec(uint32_t ssrc) override;
+
   void NotifyBweOfReceivedPacket(const RtpPacketReceived& packet);
 
   void SetBitrateConfig(
@@ -645,7 +651,7 @@ webrtc::VideoReceiveStream* Call::CreateVideoReceiveStream(
   VideoReceiveStream* receive_stream = new VideoReceiveStream(
       num_cpu_cores_, congestion_controller_.get(), &packet_router_,
       std::move(configuration), voice_engine(), module_process_thread_.get(),
-      call_stats_.get(), &remb_);
+      call_stats_.get(), &remb_, this /* flexfec_protection_mediator */);
 
   const webrtc::VideoReceiveStream::Config& config = receive_stream->config();
   {
@@ -1204,6 +1210,12 @@ bool Call::OnRecoveredPacket(const uint8_t* packet, size_t length) {
   return it->second->OnRecoveredPacket(packet, length);
 }
 
+bool Call::IsProtectedByFlexfec(uint32_t ssrc) {
+  ReadLockScoped read_lock(*receive_crit_);
+  return flexfec_receive_ssrcs_media_.find(ssrc) !=
+         flexfec_receive_ssrcs_media_.end();
+}
+
 void Call::NotifyBweOfReceivedPacket(const RtpPacketReceived& packet) {
   RTPHeader header;
   packet.GetHeader(&header);