Added configurable offsets to the per-packet overhead in ANA.

webrtc/modules/audio_coding/audio_network_adaptor/audio_network_adaptor_impl.cc

 /*
  *  Copyright (c) 2016 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 107 matching lines @@
   DumpNetworkMetrics();
 
   Controller::NetworkMetrics network_metrics;
   network_metrics.overhead_bytes_per_packet =
       rtc::Optional<size_t>(overhead_bytes_per_packet);
   UpdateNetworkMetrics(network_metrics);
 }
 
 AudioEncoderRuntimeConfig AudioNetworkAdaptorImpl::GetEncoderRuntimeConfig() {
   AudioEncoderRuntimeConfig config;
+  if (prev_config_) {
+    config.last_fl_change_increase = prev_config_->last_fl_change_increase;

[alexnarest, 2017/09/14 07:53:42]

Sorry, missed this one yesterday. I do not think we need this logic here. FL
controller will update config and it is supposed to run before bitrate
controller.

[ivoc, 2017/09/14 09:59:44]

Good point, I moved this into the FL controller.

+  }
   for (auto& controller :
        controller_manager_->GetSortedControllers(last_metrics_))
     controller->MakeDecision(&config);
 
   // Update ANA stats.
   auto increment_opt = [](rtc::Optional<uint32_t>& a) {
     a = rtc::Optional<uint32_t>(a.value_or(0) + 1);
   };
   if (prev_config_) {
     if (config.bitrate_bps != prev_config_->bitrate_bps) {
@@ skipping 66 matching lines @@
     debug_dump_writer_->DumpNetworkMetrics(last_metrics_, rtc::TimeMillis());
 }
 
 void AudioNetworkAdaptorImpl::UpdateNetworkMetrics(
     const Controller::NetworkMetrics& network_metrics) {
   for (auto& controller : controller_manager_->GetControllers())
     controller->UpdateNetworkMetrics(network_metrics);
 }
 
 }  // namespace webrtc