Revert of Revert Make the new jitter buffer the default jitter buffer.

webrtc/video/rtp_stream_receiver.cc

Index: webrtc/video/rtp_stream_receiver.cc
diff --git a/webrtc/video/rtp_stream_receiver.cc b/webrtc/video/rtp_stream_receiver.cc
index cb1ffc90445ba869c6465ee97386e738eaa76209..b8ebc77a5bf691558897bdb0f82623cbe0a79371 100644
--- a/webrtc/video/rtp_stream_receiver.cc
+++ b/webrtc/video/rtp_stream_receiver.cc
@@ -82,7 +82,6 @@ std::unique_ptr<RtpRtcp> CreateRtpRtcpModule(
 static const int kPacketLogIntervalMs = 10000;
 
 RtpStreamReceiver::RtpStreamReceiver(
-    vcm::VideoReceiver* video_receiver,
     Transport* transport,
     RtcpRttStats* rtt_stats,
     PacketRouter* packet_router,
@@ -96,7 +95,6 @@ RtpStreamReceiver::RtpStreamReceiver(
     VCMTiming* timing)
     : clock_(Clock::GetRealTimeClock()),
       config_(*config),
-      video_receiver_(video_receiver),
       packet_router_(packet_router),
       remb_(remb),
       process_thread_(process_thread),
@@ -188,25 +186,21 @@ RtpStreamReceiver::RtpStreamReceiver(
 
   process_thread_->RegisterModule(rtp_rtcp_.get());
 
-  jitter_buffer_experiment_ =
-      field_trial::FindFullName("WebRTC-NewVideoJitterBuffer") == "Enabled";
+  nack_module_.reset(
+      new NackModule(clock_, nack_sender, keyframe_request_sender));
+  if (config_.rtp.nack.rtp_history_ms == 0)
+    nack_module_->Stop();
+  process_thread_->RegisterModule(nack_module_.get());
 
-  if (jitter_buffer_experiment_) {
-    nack_module_.reset(
-        new NackModule(clock_, nack_sender, keyframe_request_sender));
-    process_thread_->RegisterModule(nack_module_.get());
-
-    packet_buffer_ = video_coding::PacketBuffer::Create(
-        clock_, kPacketBufferStartSize, kPacketBufferMaxSixe, this);
-    reference_finder_.reset(new video_coding::RtpFrameReferenceFinder(this));
-  }
+  packet_buffer_ = video_coding::PacketBuffer::Create(
+      clock_, kPacketBufferStartSize, kPacketBufferMaxSixe, this);
+  reference_finder_.reset(new video_coding::RtpFrameReferenceFinder(this));
 }
 
 RtpStreamReceiver::~RtpStreamReceiver() {
   process_thread_->DeRegisterModule(rtp_rtcp_.get());
 
-  if (jitter_buffer_experiment_)
-    process_thread_->DeRegisterModule(nack_module_.get());
+  process_thread_->DeRegisterModule(nack_module_.get());
 
   packet_router_->RemoveRtpModule(rtp_rtcp_.get());
   rtp_rtcp_->SetREMBStatus(false);
@@ -251,43 +245,35 @@ int32_t RtpStreamReceiver::OnReceivedPayloadData(
   WebRtcRTPHeader rtp_header_with_ntp = *rtp_header;
   rtp_header_with_ntp.ntp_time_ms =
       ntp_estimator_.Estimate(rtp_header->header.timestamp);
-  if (jitter_buffer_experiment_) {
-    VCMPacket packet(payload_data, payload_size, rtp_header_with_ntp);
-    packet.timesNacked = nack_module_->OnReceivedPacket(packet);
-
-    if (packet.codec == kVideoCodecH264) {
-      // Only when we start to receive packets will we know what payload type
-      // that will be used. When we know the payload type insert the correct
-      // sps/pps into the tracker.
-      if (packet.payloadType != last_payload_type_) {
-        last_payload_type_ = packet.payloadType;
-        InsertSpsPpsIntoTracker(packet.payloadType);
-      }
+  VCMPacket packet(payload_data, payload_size, rtp_header_with_ntp);
+  packet.timesNacked = nack_module_->OnReceivedPacket(packet);
+
+  if (packet.codec == kVideoCodecH264) {
+    // Only when we start to receive packets will we know what payload type
+    // that will be used. When we know the payload type insert the correct
+    // sps/pps into the tracker.
+    if (packet.payloadType != last_payload_type_) {
+      last_payload_type_ = packet.payloadType;
+      InsertSpsPpsIntoTracker(packet.payloadType);
+    }
 
-      switch (tracker_.CopyAndFixBitstream(&packet)) {
-        case video_coding::H264SpsPpsTracker::kRequestKeyframe:
-          keyframe_request_sender_->RequestKeyFrame();
-          FALLTHROUGH();
-        case video_coding::H264SpsPpsTracker::kDrop:
-          return 0;
-        case video_coding::H264SpsPpsTracker::kInsert:
-          break;
-      }
-    } else {
-      uint8_t* data = new uint8_t[packet.sizeBytes];
-      memcpy(data, packet.dataPtr, packet.sizeBytes);
-      packet.dataPtr = data;
+    switch (tracker_.CopyAndFixBitstream(&packet)) {
+      case video_coding::H264SpsPpsTracker::kRequestKeyframe:
+        keyframe_request_sender_->RequestKeyFrame();
+        FALLTHROUGH();
+      case video_coding::H264SpsPpsTracker::kDrop:
+        return 0;
+      case video_coding::H264SpsPpsTracker::kInsert:
+        break;
     }
 
-    packet_buffer_->InsertPacket(&packet);
   } else {
-    RTC_DCHECK(video_receiver_);
-    if (video_receiver_->IncomingPacket(payload_data, payload_size,
-                                        rtp_header_with_ntp) != 0) {
-      // Check this...
-      return -1;
-    }
+    uint8_t* data = new uint8_t[packet.sizeBytes];
+    memcpy(data, packet.dataPtr, packet.sizeBytes);
+    packet.dataPtr = data;
   }
+
+  packet_buffer_->InsertPacket(&packet);
   return 0;
 }
 
@@ -419,8 +405,7 @@ void RtpStreamReceiver::OnCompleteFrame(
 }
 
 void RtpStreamReceiver::OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms) {
-  if (jitter_buffer_experiment_)
-    nack_module_->UpdateRtt(max_rtt_ms);
+  nack_module_->UpdateRtt(max_rtt_ms);
 }
 
 // TODO(nisse): Drop return value.
@@ -549,36 +534,32 @@ bool RtpStreamReceiver::DeliverRtcp(const uint8_t* rtcp_packet,
 }
 
 void RtpStreamReceiver::FrameContinuous(uint16_t picture_id) {
-  if (jitter_buffer_experiment_) {
-    int seq_num = -1;
-    {
-      rtc::CritScope lock(&last_seq_num_cs_);
-      auto seq_num_it = last_seq_num_for_pic_id_.find(picture_id);
-      if (seq_num_it != last_seq_num_for_pic_id_.end())
-        seq_num = seq_num_it->second;
-    }
-    if (seq_num != -1)
-      nack_module_->ClearUpTo(seq_num);
+  int seq_num = -1;
+  {
+    rtc::CritScope lock(&last_seq_num_cs_);
+    auto seq_num_it = last_seq_num_for_pic_id_.find(picture_id);
+    if (seq_num_it != last_seq_num_for_pic_id_.end())
+      seq_num = seq_num_it->second;
   }
+  if (seq_num != -1)
+    nack_module_->ClearUpTo(seq_num);
 }
 
 void RtpStreamReceiver::FrameDecoded(uint16_t picture_id) {
-  if (jitter_buffer_experiment_) {
-    int seq_num = -1;
-    {
-      rtc::CritScope lock(&last_seq_num_cs_);
-      auto seq_num_it = last_seq_num_for_pic_id_.find(picture_id);
-      if (seq_num_it != last_seq_num_for_pic_id_.end()) {
-        seq_num = seq_num_it->second;
-        last_seq_num_for_pic_id_.erase(last_seq_num_for_pic_id_.begin(),
-                                       ++seq_num_it);
-      }
-    }
-    if (seq_num != -1) {
-      packet_buffer_->ClearTo(seq_num);
-      reference_finder_->ClearTo(seq_num);
+  int seq_num = -1;
+  {
+    rtc::CritScope lock(&last_seq_num_cs_);
+    auto seq_num_it = last_seq_num_for_pic_id_.find(picture_id);
+    if (seq_num_it != last_seq_num_for_pic_id_.end()) {
+      seq_num = seq_num_it->second;
+      last_seq_num_for_pic_id_.erase(last_seq_num_for_pic_id_.begin(),
+                                     ++seq_num_it);
     }
   }
+  if (seq_num != -1) {
+    packet_buffer_->ClearTo(seq_num);
+    reference_finder_->ClearTo(seq_num);
+  }
 }
 
 void RtpStreamReceiver::SignalNetworkState(NetworkState state) {