Add histogram stats for send delay for a sent video stream.

webrtc/video/video_send_stream.cc

 /*
  *  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 205 matching lines @@
   RTC_DCHECK_GE(config.encoder_settings.payload_type, 0);
   RTC_DCHECK_LE(config.encoder_settings.payload_type, 127);
   RTC_CHECK_EQ(0, vie_encoder_->RegisterExternalEncoder(
                       config.encoder_settings.encoder,
                       config.encoder_settings.payload_type,
                       config.encoder_settings.internal_source));
 
   RTC_CHECK(ReconfigureVideoEncoder(encoder_config));
 
   vie_channel_->RegisterSendSideDelayObserver(&stats_proxy_);
+  vie_channel_->RegisterSendPacketObserver(&stats_proxy_);
 
   if (config_.post_encode_callback)
     vie_encoder_->RegisterPostEncodeImageCallback(&encoded_frame_proxy_);
 
   if (config_.suspend_below_min_bitrate)
     vie_encoder_->SuspendBelowMinBitrate();
 
   congestion_controller_->AddEncoder(vie_encoder_.get());
   encoder_feedback_->AddEncoder(ssrcs, vie_encoder_.get());
 
@@ skipping 294 matching lines @@
                                           &jitter, &rtt_ms) == 0) {
     return rtt_ms;
   }
   return -1;
 }
 
 int VideoSendStream::GetPaddingNeededBps() const {
   return vie_encoder_->GetPaddingNeededBps();
 }
 
+void VideoSendStream::OnSentPacket(int packet_id) {
+  stats_proxy_.OnSentPacket(packet_id);
+}
+
 bool VideoSendStream::SetSendCodec(VideoCodec video_codec) {
   static const int kEncoderMinBitrate = 30;
   if (video_codec.maxBitrate == 0) {
     // Unset max bitrate -> cap to one bit per pixel.
     video_codec.maxBitrate =
         (video_codec.width * video_codec.height * video_codec.maxFramerate) /
         1000;
   }
 
   if (video_codec.minBitrate < kEncoderMinBitrate)
@@ skipping 21 matching lines @@
   vie_encoder_->SetSsrcs(used_ssrcs);
 
   // Restart the media flow
   vie_encoder_->Restart();
 
   return true;
 }
 
 }  // namespace internal
 }  // namespace webrtc