Add periodic logging of video stats.

webrtc/video_send_stream.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 23 matching lines @@
   // externally to make sure that any old frames are not delivered concurrently.
   virtual void IncomingCapturedFrame(const VideoFrame& video_frame) = 0;
 
  protected:
   virtual ~VideoCaptureInput() {}
 };
 
 class VideoSendStream {
  public:
   struct StreamStats {
+    std::string ToString() const;
+
     FrameCounts frame_counts;
     int width = 0;
     int height = 0;
     // TODO(holmer): Move bitrate_bps out to the webrtc::Call layer.
     int total_bitrate_bps = 0;
     int retransmit_bitrate_bps = 0;
     int avg_delay_ms = 0;
     int max_delay_ms = 0;
     StreamDataCounters rtp_stats;
     RtcpPacketTypeCounter rtcp_packet_type_counts;
     RtcpStatistics rtcp_stats;
   };
 
   struct Stats {
+    std::string ToString(int64_t time_ms) const;
     std::string encoder_implementation_name = "unknown";
     int input_frame_rate = 0;
     int encode_frame_rate = 0;
     int avg_encode_time_ms = 0;
     int encode_usage_percent = 0;
     int target_media_bitrate_bps = 0;
     int media_bitrate_bps = 0;
     bool suspended = false;
     bool bw_limited_resolution = false;
     std::map<uint32_t, StreamStats> substreams;
@@ skipping 116 matching lines @@
 
   virtual Stats GetStats() = 0;
 
  protected:
   virtual ~VideoSendStream() {}
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_SEND_STREAM_H_