Add histogram for percentage of sent frames that are limited in resolution due to bandwidth.

webrtc/video/send_statistics_proxy.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.
  */
 
@@ skipping 75 matching lines @@
                     const unsigned int framerate,
                     const unsigned int bitrate) override;
 
   void SuspendChange(int video_channel, bool is_suspended) override;
 
   void SendSideDelayUpdated(int avg_delay_ms,
                             int max_delay_ms,
                             uint32_t ssrc) override;
 
  private:
-  struct SampleCounter {
+  class SampleCounter {
+   public:
     SampleCounter() : sum(0), num_samples(0) {}
+    ~SampleCounter() {}
     void Add(int sample);
     int Avg(int min_required_samples) const;
 
    private:
     int sum;
     int num_samples;
   };
+  class BoolSampleCounter {
+   public:
+    BoolSampleCounter() : sum(0), num_samples(0) {}
+    ~BoolSampleCounter() {}
+    void Add(bool sample);
+    int Percent(int min_required_samples) const;
+
+   private:
+    int sum;
+    int num_samples;
+  };
   struct StatsUpdateTimes {
     StatsUpdateTimes() : resolution_update_ms(0) {}
     int64_t resolution_update_ms;
     int64_t bitrate_update_ms;
   };
   void PurgeOldStats() EXCLUSIVE_LOCKS_REQUIRED(crit_);
   VideoSendStream::StreamStats* GetStatsEntry(uint32_t ssrc)
       EXCLUSIVE_LOCKS_REQUIRED(crit_);
   void UpdateHistograms() EXCLUSIVE_LOCKS_REQUIRED(crit_);
 
   Clock* const clock_;
   const VideoSendStream::Config config_;
   mutable rtc::CriticalSection crit_;
   VideoSendStream::Stats stats_ GUARDED_BY(crit_);
   rtc::RateTracker input_frame_rate_tracker_ GUARDED_BY(crit_);
   rtc::RateTracker input_frame_rate_tracker_total_ GUARDED_BY(crit_);
   rtc::RateTracker sent_frame_rate_tracker_total_ GUARDED_BY(crit_);
   uint32_t last_sent_frame_timestamp_ GUARDED_BY(crit_);
   std::map<uint32_t, StatsUpdateTimes> update_times_ GUARDED_BY(crit_);
 
   int max_sent_width_per_timestamp_ GUARDED_BY(crit_);
   int max_sent_height_per_timestamp_ GUARDED_BY(crit_);
   SampleCounter input_width_counter_ GUARDED_BY(crit_);
   SampleCounter input_height_counter_ GUARDED_BY(crit_);
   SampleCounter sent_width_counter_ GUARDED_BY(crit_);
   SampleCounter sent_height_counter_ GUARDED_BY(crit_);
   SampleCounter encode_time_counter_ GUARDED_BY(crit_);
+  BoolSampleCounter bw_limited_frame_counter_ GUARDED_BY(crit_);
+  SampleCounter bw_resolutions_disabled_counter_ GUARDED_BY(crit_);
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_VIDEO_SEND_STATISTICS_PROXY_H_