Reland of Drop frames until specified bitrate is achieved.

webrtc/video/vie_encoder.h

 /*
  *  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 132 matching lines @@
     VideoRotation rotation;
     bool is_texture;
     int pixel_count() const { return width * height; }
   };
 
   void ConfigureEncoderOnTaskQueue(VideoEncoderConfig config,
                                    size_t max_data_payload_length,
                                    bool nack_enabled);
   void ReconfigureEncoder();
 
+  void ConfigureQualityScaler();
+
   // Implements VideoSinkInterface.
   void OnFrame(const VideoFrame& video_frame) override;
 
   // Implements VideoSendStatisticsCallback.
   void SendStatistics(uint32_t bit_rate,
                       uint32_t frame_rate) override;
 
   void EncodeVideoFrame(const VideoFrame& frame,
                         int64_t time_when_posted_in_ms);
 
   // Implements EncodedImageCallback.
   EncodedImageCallback::Result OnEncodedImage(
       const EncodedImage& encoded_image,
       const CodecSpecificInfo* codec_specific_info,
       const RTPFragmentationHeader* fragmentation) override;
 
   void OnDroppedFrame() override;
 
   bool EncoderPaused() const;
   void TraceFrameDropStart();
   void TraceFrameDropEnd();
 
   rtc::Event shutdown_event_;
 
   const uint32_t number_of_cores_;
+  // Counts how many frames we've dropped in the initial rampup phase.
+  int initial_rampup_;
 
   const std::unique_ptr<VideoSourceProxy> source_proxy_;
   EncoderSink* sink_;
   const VideoSendStream::Config::EncoderSettings settings_;
   const VideoCodecType codec_type_;
 
   vcm::VideoSender video_sender_ ACCESS_ON(&encoder_queue_);
   OveruseFrameDetector overuse_detector_ ACCESS_ON(&encoder_queue_);
   std::unique_ptr<QualityScaler> quality_scaler_ ACCESS_ON(&encoder_queue_);
 
@@ skipping 53 matching lines @@
   // All public methods are proxied to |encoder_queue_|. It must must be
   // destroyed first to make sure no tasks are run that use other members.
   rtc::TaskQueue encoder_queue_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(ViEEncoder);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIE_ENCODER_H_