PacketBuffer is now ref counted.

webrtc/modules/video_coding/rtp_frame_reference_finder.h

 /*
  *  Copyright (c) 2016 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_MODULES_VIDEO_CODING_RTP_FRAME_REFERENCE_FINDER_H_
 #define WEBRTC_MODULES_VIDEO_CODING_RTP_FRAME_REFERENCE_FINDER_H_
 
 #include <array>
 #include <map>
 #include <memory>
 #include <queue>
 #include <set>
 #include <utility>
 
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/thread_annotations.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/video_coding/sequence_number_util.h"
 
 namespace webrtc {
 namespace video_coding {
 
+class FrameObject;
 class RtpFrameObject;
-class OnCompleteFrameCallback;
+
+// A complete frame is a frame which has received all its packets and all its
+// references are known.
+class OnCompleteFrameCallback {
+ public:
+  virtual ~OnCompleteFrameCallback() {}
+  virtual void OnCompleteFrame(std::unique_ptr<FrameObject> frame) = 0;
+};
 
 class RtpFrameReferenceFinder {
  public:
   explicit RtpFrameReferenceFinder(OnCompleteFrameCallback* frame_callback);
   void ManageFrame(std::unique_ptr<RtpFrameObject> frame);
   void PaddingReceived(uint16_t seq_num);
 
  private:
   static const uint16_t kPicIdLength = 1 << 7;
   static const uint8_t kMaxTemporalLayers = 5;
@@ skipping 128 matching lines @@
              kMaxTemporalLayers>
       missing_frames_for_layer_ GUARDED_BY(crit_);
 
   OnCompleteFrameCallback* frame_callback_;
 };
 
 }  // namespace video_coding
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_RTP_FRAME_REFERENCE_FINDER_H_