Refactoring: Hide VideoCodec.codecSpecific as "private"

webrtc/modules/video_coding/video_sender.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 93 matching lines @@
     LOG(LS_ERROR) << "Failed to initialize set encoder with payload name '"
                   << sendCodec->plName << "'.";
     return VCM_CODEC_ERROR;
   }
 
   // SetSendCodec succeeded, _encoder should be set.
   RTC_DCHECK(_encoder);
 
   int numLayers;
   if (sendCodec->codecType == kVideoCodecVP8) {
-    numLayers = sendCodec->codecSpecific.VP8.numberOfTemporalLayers;
+    numLayers = sendCodec->VP8().numberOfTemporalLayers;
   } else if (sendCodec->codecType == kVideoCodecVP9) {
-    numLayers = sendCodec->codecSpecific.VP9.numberOfTemporalLayers;
+    numLayers = sendCodec->VP9().numberOfTemporalLayers;
   } else {
     numLayers = 1;
   }
 
   // If we have screensharing and we have layers, we disable frame dropper.
   bool disable_frame_dropper =
       numLayers > 1 && sendCodec->mode == kScreensharing;
   if (disable_frame_dropper) {
     _mediaOpt.EnableFrameDropper(false);
   } else if (frame_dropper_enabled_) {
@@ skipping 255 matching lines @@
   // 10 kbps.
   int window_bps = std::max(threshold_bps / 10, 10000);
   _mediaOpt.SuspendBelowMinBitrate(threshold_bps, window_bps);
 }
 
 bool VideoSender::VideoSuspended() const {
   return _mediaOpt.IsVideoSuspended();
 }
 }  // namespace vcm
 }  // namespace webrtc