Add histogram stats for average send delay of sent packets for a sent video stream. The delay is measured from a packet is sent to the transport until leaving the socket.
- "WebRTC.Video.SendDelayInMs"
Change so that PacketOption packet id is always set in RtpSender (if having a TransportSequenceNumberAllocator).
Add SendDelayStats class for computing delays.
Add SendPacketObserver to RtpRtcp config and register SendDelayStats as observer.
Wire up OnSentPacket to SendDelayStats.
BUG=webrtc:5215
Review-Url: https://codereview.webrtc.org/1478253002
Cr-Commit-Position: refs/heads/master@{#12600}
diff --git a/webrtc/video/BUILD.gn b/webrtc/video/BUILD.gn
index 0bc5a12..74fad84 100644
--- a/webrtc/video/BUILD.gn
+++ b/webrtc/video/BUILD.gn
@@ -26,6 +26,8 @@
"report_block_stats.h",
"rtp_stream_receiver.cc",
"rtp_stream_receiver.h",
+ "send_delay_stats.cc",
+ "send_delay_stats.h",
"send_statistics_proxy.cc",
"send_statistics_proxy.h",
"stream_synchronization.cc",
