Extract common simulcast logic from VP8 wrapper and simulcast adapter

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 19 matching lines @@
 namespace webrtc {
 
 class Config;
 class EncodedImageCallback;
 class OveruseFrameDetector;
 class PacedSender;
 class PayloadRouter;
 class ProcessThread;
 class QMVideoSettingsCallback;
 class SendStatisticsProxy;
+class SimulcastState;
 class ViEBitrateObserver;
 class ViEEffectFilter;
 class VideoCodingModule;
 class VideoEncoder;
 
 class ViEEncoder : public VideoEncoderRateObserver,
                    public EncodedImageCallback,
                    public VCMPacketizationCallback,
                    public VCMSendStatisticsCallback {
  public:
@@ skipping 88 matching lines @@
   OveruseFrameDetector* const overuse_detector_;
   PacedSender* const pacer_;
   PayloadRouter* const send_payload_router_;
   EncodedImageCallback* const post_encode_callback_;
 
   // The time we last received an input frame or encoded frame. This is used to
   // track when video is stopped long enough that we also want to stop sending
   // padding.
   int64_t time_of_last_frame_activity_ms_ GUARDED_BY(data_cs_);
   VideoCodec encoder_config_ GUARDED_BY(data_cs_);
+  std::unique_ptr<SimulcastState> simulcast_rates_ GUARDED_BY(data_cs_);

[pbos-webrtc, 2016/04/29 21:23:27]

stack alloc please

   int min_transmit_bitrate_bps_ GUARDED_BY(data_cs_);
   uint32_t last_observed_bitrate_bps_ GUARDED_BY(data_cs_);
   bool network_is_transmitting_ GUARDED_BY(data_cs_);
   bool encoder_paused_ GUARDED_BY(data_cs_);
   bool encoder_paused_and_dropped_frame_ GUARDED_BY(data_cs_);
   std::vector<int64_t> time_last_intra_request_ms_ GUARDED_BY(data_cs_);
 
   ProcessThread* module_process_thread_;
 
   bool has_received_sli_ GUARDED_BY(data_cs_);
   uint8_t picture_id_sli_ GUARDED_BY(data_cs_);
   bool has_received_rpsi_ GUARDED_BY(data_cs_);
   uint64_t picture_id_rpsi_ GUARDED_BY(data_cs_);
 
   bool video_suspended_ GUARDED_BY(data_cs_);
 
   std::unique_ptr<IvfFileWriter> file_writers_[kMaxLayers] GUARDED_BY(data_cs_);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIE_ENCODER_H_