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

webrtc/video/video_receive_stream.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 205 matching lines @@
           packet_router,
           remb,
           &config_,
           &stats_proxy_,
           process_thread_,
           congestion_controller_->GetRetransmissionRateLimiter(),
           this,  // NackSender
           this,  // KeyFrameRequestSender
           this,  // OnCompleteFrameCallback
           timing_.get()),
-      rtp_stream_sync_(&video_receiver_, &rtp_stream_receiver_) {
+      rtp_stream_sync_(&video_receiver_, &rtp_stream_receiver_),
+      jitter_buffer_experiment_(
+          field_trial::FindFullName("WebRTC-NewVideoJitterBuffer") ==
+          "Enabled") {
   LOG(LS_INFO) << "VideoReceiveStream: " << config_.ToString();
 
   RTC_DCHECK(process_thread_);
   RTC_DCHECK(congestion_controller_);
   RTC_DCHECK(call_stats_);
 
   RTC_DCHECK(!config_.decoders.empty());
   std::set<int> decoder_payload_types;
   for (const Decoder& decoder : config_.decoders) {
     RTC_CHECK(decoder.decoder);
     RTC_CHECK(decoder_payload_types.find(decoder.payload_type) ==
               decoder_payload_types.end())
         << "Duplicate payload type (" << decoder.payload_type
         << ") for different decoders.";
     decoder_payload_types.insert(decoder.payload_type);
   }
 
   video_receiver_.SetRenderDelay(config.render_delay_ms);
 
-  jitter_estimator_.reset(new VCMJitterEstimator(clock_));
-  frame_buffer_.reset(new video_coding::FrameBuffer(
-      clock_, jitter_estimator_.get(), timing_.get(), &stats_proxy_));
+  if (jitter_buffer_experiment_) {
+    jitter_estimator_.reset(new VCMJitterEstimator(clock_));
+    frame_buffer_.reset(new video_coding::FrameBuffer(
+        clock_, jitter_estimator_.get(), timing_.get()));
+  }
 
   process_thread_->RegisterModule(&video_receiver_);
   process_thread_->RegisterModule(&rtp_stream_sync_);
 }
 
 VideoReceiveStream::~VideoReceiveStream() {
   LOG(LS_INFO) << "~VideoReceiveStream: " << config_.ToString();
   Stop();
 
   process_thread_->DeRegisterModule(&rtp_stream_sync_);
@@ skipping 19 matching lines @@
 }
 
 bool VideoReceiveStream::OnRecoveredPacket(const uint8_t* packet,
                                            size_t length) {
   return rtp_stream_receiver_.OnRecoveredPacket(packet, length);
 }
 
 void VideoReceiveStream::Start() {
   if (decode_thread_.IsRunning())
     return;
+  if (jitter_buffer_experiment_) {
+    frame_buffer_->Start();
+    call_stats_->RegisterStatsObserver(&rtp_stream_receiver_);
 
-  frame_buffer_->Start();
-  call_stats_->RegisterStatsObserver(&rtp_stream_receiver_);
-
-  if (rtp_stream_receiver_.IsRetransmissionsEnabled() &&
-      rtp_stream_receiver_.IsUlpfecEnabled()) {
-    frame_buffer_->SetProtectionMode(kProtectionNackFEC);
+    if (rtp_stream_receiver_.IsRetransmissionsEnabled() &&
+        rtp_stream_receiver_.IsUlpfecEnabled()) {
+      frame_buffer_->SetProtectionMode(kProtectionNackFEC);
+    }
   }
-
   transport_adapter_.Enable();
   rtc::VideoSinkInterface<VideoFrame>* renderer = nullptr;
   if (config_.renderer) {
     if (config_.disable_prerenderer_smoothing) {
       renderer = this;
     } else {
       incoming_video_stream_.reset(
           new IncomingVideoStream(config_.render_delay_ms, this));
       renderer = incoming_video_stream_.get();
     }
@@ skipping 24 matching lines @@
   rtp_stream_receiver_.StartReceive();
 }
 
 void VideoReceiveStream::Stop() {
   rtp_stream_receiver_.StopReceive();
   // TriggerDecoderShutdown will release any waiting decoder thread and make it
   // stop immediately, instead of waiting for a timeout. Needs to be called
   // before joining the decoder thread thread.
   video_receiver_.TriggerDecoderShutdown();
 
-  frame_buffer_->Stop();
-  call_stats_->DeregisterStatsObserver(&rtp_stream_receiver_);
+  if (jitter_buffer_experiment_) {
+    frame_buffer_->Stop();
+    call_stats_->DeregisterStatsObserver(&rtp_stream_receiver_);
+  }
 
   if (decode_thread_.IsRunning()) {
     decode_thread_.Stop();
     // Deregister external decoders so they are no longer running during
     // destruction. This effectively stops the VCM since the decoder thread is
     // stopped, the VCM is deregistered and no asynchronous decoder threads are
     // running.
     for (const Decoder& decoder : config_.decoders)
       video_receiver_.RegisterExternalDecoder(nullptr, decoder.payload_type);
   }
@@ skipping 75 matching lines @@
 
   return Result(Result::OK, encoded_image._timeStamp);
 }
 
 bool VideoReceiveStream::DecodeThreadFunction(void* ptr) {
   static_cast<VideoReceiveStream*>(ptr)->Decode();
   return true;
 }
 
 void VideoReceiveStream::Decode() {
-  static const int kMaxWaitForFrameMs = 3000;
-  std::unique_ptr<video_coding::FrameObject> frame;
-  video_coding::FrameBuffer::ReturnReason res =
-      frame_buffer_->NextFrame(kMaxWaitForFrameMs, &frame);
+  static const int kMaxDecodeWaitTimeMs = 50;
+  if (jitter_buffer_experiment_) {
+    static const int kMaxWaitForFrameMs = 3000;
+    std::unique_ptr<video_coding::FrameObject> frame;
+    video_coding::FrameBuffer::ReturnReason res =
+        frame_buffer_->NextFrame(kMaxWaitForFrameMs, &frame);
 
-  if (res == video_coding::FrameBuffer::ReturnReason::kStopped)
-    return;
+    if (res == video_coding::FrameBuffer::ReturnReason::kStopped)
+      return;
 
-  if (frame) {
-    if (video_receiver_.Decode(frame.get()) == VCM_OK)
-      rtp_stream_receiver_.FrameDecoded(frame->picture_id);
+    if (frame) {
+      if (video_receiver_.Decode(frame.get()) == VCM_OK)
+        rtp_stream_receiver_.FrameDecoded(frame->picture_id);
+    } else {
+      LOG(LS_WARNING) << "No decodable frame in " << kMaxWaitForFrameMs
+                      << " ms, requesting keyframe.";
+      RequestKeyFrame();
+    }
   } else {
-    LOG(LS_WARNING) << "No decodable frame in " << kMaxWaitForFrameMs
-                    << " ms, requesting keyframe.";
-    RequestKeyFrame();
+    video_receiver_.Decode(kMaxDecodeWaitTimeMs);
   }
 }
 
 void VideoReceiveStream::SendNack(
     const std::vector<uint16_t>& sequence_numbers) {
   rtp_stream_receiver_.RequestPacketRetransmit(sequence_numbers);
 }
 
 void VideoReceiveStream::EnableEncodedFrameRecording(rtc::PlatformFile file,
                                                      size_t byte_limit) {
@@ skipping 12 matching lines @@
     RequestKeyFrame();
   }
 }
 
 void VideoReceiveStream::RequestKeyFrame() {
   rtp_stream_receiver_.RequestKeyFrame();
 }
 
 }  // namespace internal
 }  // namespace webrtc