Add periodic logging of video stats.

webrtc/video/video_receive_stream.cc

Index: webrtc/video/video_receive_stream.cc
diff --git a/webrtc/video/video_receive_stream.cc b/webrtc/video/video_receive_stream.cc
index ad9beb35e75384801cf03d264f935a7137a9b383..05fd441b8a07e485187e684f1655aa37c6d652f0 100644
--- a/webrtc/video/video_receive_stream.cc
+++ b/webrtc/video/video_receive_stream.cc
@@ -109,6 +109,26 @@ std::string VideoReceiveStream::Config::Rtp::ToString() const {
   return ss.str();
 }
 
+std::string VideoReceiveStream::Stats::ToString(int64_t time_ms) const {
+  std::stringstream ss;
+  ss << "VideoReceiveStream stats:" << time_ms << ",{ssrc:" << ssrc << ",";
+  ss << "[tot_bps:" << total_bitrate_bps << "],";

[pbos-webrtc, 2016/07/10 16:58:51]

Remove []s unless this format is from somewhere. Also can we have total_bps or
do these strings come from somewhere?

Same with w: and h: etc, these would be more readable as decode_fps etc. instead
of being shortened.

[åsapersson, 2016/08/01 15:55:22]

Done.

+  ss << "[w:" << width << "],";
+  ss << "[h:" << height << "],";
+  ss << "[network_fps:" << network_frame_rate << "],";
+  ss << "[dec_fps:" << decode_frame_rate << "],";
+  ss << "[render_fps:" << render_frame_rate << "],";
+  ss << "[dec_ms:" << decode_ms << "],";
+  ss << "[max_dec_ms:" << max_decode_ms << "],";
+  ss << "[cur_delay_ms:" << current_delay_ms << "],";
+  ss << "[targ_delay_ms:" << target_delay_ms << "],";
+  ss << "[jb_delay_ms:" << jitter_buffer_ms << "],";
+  ss << "[min_playout_delay_ms:" << min_playout_delay_ms << "],";
+  ss << "[discarded:" << discarded_packets << "]";
+  ss << '}';
+  return ss.str();
+}
+
 namespace {
 VideoCodec CreateDecoderVideoCodec(const VideoReceiveStream::Decoder& decoder) {
   VideoCodec codec;