Periodically update channel parameters and send TargetBitrate message.

webrtc/video/vie_encoder.cc

 /*
  *  Copyright (c) 2012 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 529 matching lines @@
     pending_encoder_reconfiguration_ = true;
     last_frame_info_ = rtc::Optional<VideoFrameInfo>(
         VideoFrameInfo(video_frame.width(), video_frame.height(),
                        video_frame.rotation(), video_frame.is_texture()));
     LOG(LS_INFO) << "Video frame parameters changed: dimensions="
                  << last_frame_info_->width << "x" << last_frame_info_->height
                  << ", rotation=" << last_frame_info_->rotation
                  << ", texture=" << last_frame_info_->is_texture;
   }
 
+  int64_t now_ms = clock_->TimeInMilliseconds();
   if (pending_encoder_reconfiguration_) {
     ReconfigureEncoder();
+  } else if (!last_parameters_update_ms_ ||
+             now_ms - *last_parameters_update_ms_ >=
+                 vcm::VCMProcessTimer::kDefaultProcessIntervalMs) {
+    video_sender_.UpdateChannelParemeters(rate_allocator_.get(),
+                                          bitrate_observer_);
   }
+  last_parameters_update_ms_.emplace(now_ms);
 
   if (EncoderPaused()) {
     TraceFrameDropStart();
     return;
   }
   TraceFrameDropEnd();
 
   last_frame_height_ = video_frame.height();
   last_frame_width_ = video_frame.width();
 
@@ skipping 191 matching lines @@
   --scale_counter_[reason];
   source_proxy_->RequestHigherResolutionThan(current_pixel_count);
   LOG(LS_INFO) << "Scaling up resolution.";
   for (size_t i = 0; i < kScaleReasonSize; ++i) {
     LOG(LS_INFO) << "Scaled " << scale_counter_[i]
                  << " times for reason: " << (i ? "cpu" : "quality");
   }
 }
 
 }  // namespace webrtc