Let FlexfecReceiveStreamImpl send RTCP RRs.

webrtc/call/flexfec_receive_stream_impl.cc

Index: webrtc/call/flexfec_receive_stream_impl.cc
diff --git a/webrtc/call/flexfec_receive_stream_impl.cc b/webrtc/call/flexfec_receive_stream_impl.cc
index 95bcfc14dc1de9bc2cedee29fff729e314c6ba5a..f5272c9029dd48f2e8ba77866a0df0c81fe81b1c 100644
--- a/webrtc/call/flexfec_receive_stream_impl.cc
+++ b/webrtc/call/flexfec_receive_stream_impl.cc
@@ -10,10 +10,16 @@
 
 #include "webrtc/call/flexfec_receive_stream_impl.h"
 
-#include <utility>
+#include <string>
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
+#include "webrtc/modules/rtp_rtcp/include/flexfec_receiver.h"
+#include "webrtc/modules/rtp_rtcp/include/receive_statistics.h"
+#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp.h"
+#include "webrtc/modules/rtp_rtcp/source/rtp_packet_received.h"
+#include "webrtc/modules/utility/include/process_thread.h"
+#include "webrtc/system_wrappers/include/clock.h"
 
 namespace webrtc {
 
@@ -97,33 +103,77 @@ std::unique_ptr<FlexfecReceiver> MaybeCreateFlexfecReceiver(
                           recovered_packet_receiver));
 }
 
+std::unique_ptr<RtpRtcp> CreateRtpRtcpModule(
+    ReceiveStatistics* receive_statistics,
+    Transport* rtcp_send_transport,
+    RtcpRttStats* rtt_stats) {
+  RtpRtcp::Configuration configuration;
+  configuration.audio = false;
+  configuration.receiver_only = true;
+  configuration.clock = Clock::GetRealTimeClock();
+  configuration.receive_statistics = receive_statistics;
+  configuration.outgoing_transport = rtcp_send_transport;
+  configuration.rtt_stats = rtt_stats;
+  std::unique_ptr<RtpRtcp> rtp_rtcp(RtpRtcp::CreateRtpRtcp(configuration));
+  return rtp_rtcp;
+}
+
 }  // namespace
 
 FlexfecReceiveStreamImpl::FlexfecReceiveStreamImpl(
     const Config& config,
-    RecoveredPacketReceiver* recovered_packet_receiver)
-    : started_(false),
-      config_(config),
-      receiver_(
-          MaybeCreateFlexfecReceiver(config_, recovered_packet_receiver)) {
+    RecoveredPacketReceiver* recovered_packet_receiver,
+    RtcpRttStats* rtt_stats,
+    ProcessThread* process_thread)
+    : config_(config),
+      started_(false),
+      receiver_(MaybeCreateFlexfecReceiver(config_, recovered_packet_receiver)),
+      rtp_receive_statistics_(
+          ReceiveStatistics::Create(Clock::GetRealTimeClock())),
+      rtp_rtcp_(CreateRtpRtcpModule(rtp_receive_statistics_.get(),
+                                    config_.rtcp_send_transport,
+                                    rtt_stats)),
+      process_thread_(process_thread) {
   LOG(LS_INFO) << "FlexfecReceiveStreamImpl: " << config_.ToString();
+
+  // RTCP reporting.
+  rtp_rtcp_->SetSendingMediaStatus(false);
+  rtp_rtcp_->SetRTCPStatus(config_.rtcp_mode);
+  rtp_rtcp_->SetSSRC(config_.local_ssrc);
+  process_thread_->RegisterModule(rtp_rtcp_.get());
 }
 
 FlexfecReceiveStreamImpl::~FlexfecReceiveStreamImpl() {
   LOG(LS_INFO) << "~FlexfecReceiveStreamImpl: " << config_.ToString();
   Stop();
+  process_thread_->DeRegisterModule(rtp_rtcp_.get());
 }
 
 bool FlexfecReceiveStreamImpl::AddAndProcessReceivedPacket(
-    RtpPacketReceived packet) {
+    const RtpPacketReceived& packet) {
   {
     rtc::CritScope cs(&crit_);
     if (!started_)
       return false;
   }
+
   if (!receiver_)
     return false;
-  return receiver_->AddAndProcessReceivedPacket(std::move(packet));
+
+  if (!receiver_->AddAndProcessReceivedPacket(packet))
+    return false;
+
+  // Do not report media packets in the RTCP RRs generated by |rtp_rtcp_|.
+  if (packet.Ssrc() == config_.remote_ssrc) {
+    RTPHeader header;
+    packet.GetHeader(&header);
+    // FlexFEC packets are never retransmitted.
+    const bool kNotRetransmitted = false;
+    rtp_receive_statistics_->IncomingPacket(header, packet.size(),
+                                            kNotRetransmitted);
+  }
+
+  return true;
 }
 
 void FlexfecReceiveStreamImpl::Start() {