Added ClearTo(seq_num) to RtpFrameReferenceFinder.

webrtc/modules/video_coding/rtp_frame_reference_finder.h

Index: webrtc/modules/video_coding/rtp_frame_reference_finder.h
diff --git a/webrtc/modules/video_coding/rtp_frame_reference_finder.h b/webrtc/modules/video_coding/rtp_frame_reference_finder.h
index a812303b7ea85eea4e1a02992322f22473743367..d48efc63eecdad4fe350f5ad926da83acc4ccb98 100644
--- a/webrtc/modules/video_coding/rtp_frame_reference_finder.h
+++ b/webrtc/modules/video_coding/rtp_frame_reference_finder.h
@@ -42,6 +42,7 @@ class RtpFrameReferenceFinder {
   explicit RtpFrameReferenceFinder(OnCompleteFrameCallback* frame_callback);

[brandtr, 2016/09/05 11:20:32]

Perhaps it would be good to comment the public interface of this class as well.
(The private interface is nicely commented.)

[philipel, 2016/09/05 12:11:01]

Done.

   void ManageFrame(std::unique_ptr<RtpFrameObject> frame);
   void PaddingReceived(uint16_t seq_num);
+  void ClearTo(uint16_t seq_num);
 
  private:
   static const uint16_t kPicIdLength = 1 << 7;
@@ -177,6 +178,11 @@ class RtpFrameReferenceFinder {
              kMaxTemporalLayers>
       missing_frames_for_layer_ GUARDED_BY(crit_);
 
+  // How far frames have been cleared by sequence number. A frame will be
+  // cleared if it contains a packet with a sequence number older than
+  // |cleared_to_seq_num_|.
+  int cleared_to_seq_num_ GUARDED_BY(crit_);
+
   OnCompleteFrameCallback* frame_callback_;
 };