RTCMediaStreamTrackStats.framesSent collected by RTCStatsCollector.

webrtc/api/rtcstatscollector.cc

 /*
  *  Copyright 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.
  */
 
@@ skipping 434 matching lines @@
               GetMediaInfoFromSsrc(video_info->senders, ssrc);
           if (sender_info) {
             video_track_stats->ssrc_ids = StringSsrcsFromSsrcs(
                 sender_info->ssrcs());
             video_track_stats->frame_width = static_cast<uint32_t>(
                 sender_info->send_frame_width);
             video_track_stats->frame_height = static_cast<uint32_t>(
                 sender_info->send_frame_height);
             video_track_stats->frames_per_second = static_cast<double>(
                 sender_info->framerate_sent);
+            video_track_stats->frames_sent = sender_info->frames_encoded;

[hbos, 2016/12/29 15:34:59]

This is the same as RTCOutboundRTPStreamStats.framesEncoded added in
https://codereview.webrtc.org/2588373005/diff/20001/webrtc/api/rtcstatscollec...
!

[hta-webrtc, 2017/01/02 16:00:12]

The reason why the stats have two variables is that we might drop some frames
due to congestion control after encoding them.
Add a TODO that says "will reduce this by frames dropped due to congestion
control when available".

[hbos, 2017/01/19 10:41:16]

Done.

           }
         } else {
           const cricket::VideoReceiverInfo* receiver_info =
               GetMediaInfoFromSsrc(video_info->receivers, ssrc);
           if (receiver_info) {
             video_track_stats->ssrc_ids = StringSsrcsFromSsrcs(
                 receiver_info->ssrcs());
             video_track_stats->frame_width = static_cast<uint32_t>(
                 receiver_info->frame_width);
             video_track_stats->frame_height = static_cast<uint32_t>(
@@ skipping 616 matching lines @@
     const std::string& type) {
   return CandidateTypeToRTCIceCandidateType(type);
 }
 
 const char* DataStateToRTCDataChannelStateForTesting(
     DataChannelInterface::DataState state) {
   return DataStateToRTCDataChannelState(state);
 }
 
 }  // namespace webrtc