Measure encoding time on encode callbacks.

webrtc/frame_callback.h

 /*
  *  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.
  */
 
 #ifndef WEBRTC_FRAME_CALLBACK_H_
 #define WEBRTC_FRAME_CALLBACK_H_
 
 #include <stddef.h>
+#include <stdint.h>
 
 #include "webrtc/common_types.h"
 
 namespace webrtc {
 
 class VideoFrame;
 
 struct EncodedFrame {
  public:
   EncodedFrame() : data_(NULL), length_(0), frame_type_(kEmptyFrame) {}
@@ skipping 11 matching lines @@
   // frame content.
   virtual void FrameCallback(VideoFrame* video_frame) = 0;
 
  protected:
   virtual ~I420FrameCallback() {}
 };
 
 class EncodedFrameObserver {
  public:
   virtual void EncodedFrameCallback(const EncodedFrame& encoded_frame) = 0;
+  virtual void OnEncodeTiming(int64_t capture_ntp_ms, int encode_duration_ms) {}
 
  protected:
   virtual ~EncodedFrameObserver() {}
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_FRAME_CALLBACK_H_