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From: Andreas Pehrson <apehrson@mozilla.com>
Date: Tue, 2 Nov 2021 14:35:00 +0000
Subject: Bug 1729455 - Add to stats the local receive time for receiving video
 Sender Reports. r=ng

Differential Revision: https://phabricator.services.mozilla.com/D125712
Mercurial Revision: https://hg.mozilla.org/mozilla-central/rev/99267b6d193fbcb3e4c845c5e80770424d6d06e2
---
 call/video_receive_stream.h                  |  3 ++-
 modules/rtp_rtcp/source/rtcp_receiver.cc     |  6 ++++--
 modules/rtp_rtcp/source/rtcp_receiver.h      |  3 ++-
 modules/rtp_rtcp/source/rtp_rtcp_impl.cc     | 10 +++++-----
 modules/rtp_rtcp/source/rtp_rtcp_impl.h      |  3 ++-
 modules/rtp_rtcp/source/rtp_rtcp_impl2.cc    | 10 +++++-----
 modules/rtp_rtcp/source/rtp_rtcp_impl2.h     |  3 ++-
 modules/rtp_rtcp/source/rtp_rtcp_interface.h |  5 +++--
 video/rtp_video_stream_receiver2.cc          |  5 +++--
 video/rtp_video_stream_receiver2.h           |  3 ++-
 video/video_receive_stream2.cc               |  3 ++-
 11 files changed, 32 insertions(+), 22 deletions(-)

diff --git a/call/video_receive_stream.h b/call/video_receive_stream.h
index 01fb08a009..87ee39e142 100644
--- a/call/video_receive_stream.h
+++ b/call/video_receive_stream.h
@@ -152,10 +152,11 @@ class VideoReceiveStreamInterface : public MediaReceiveStreamInterface {
     RtcpPacketTypeCounter rtcp_packet_type_counts;
     absl::optional<RtpReceiveStats> rtx_rtp_stats;
 
-    // Mozilla modification: Init these three.
+    // Mozilla modification: Init these.
     uint32_t rtcp_sender_packets_sent = 0;
     uint32_t rtcp_sender_octets_sent = 0;
     int64_t rtcp_sender_ntp_timestamp_ms = 0;
+    int64_t rtcp_sender_remote_ntp_timestamp_ms = 0;
 
     // Timing frame info: all important timestamps for a full lifetime of a
     // single 'timing frame'.
diff --git a/modules/rtp_rtcp/source/rtcp_receiver.cc b/modules/rtp_rtcp/source/rtcp_receiver.cc
index e2ad674012..94de316421 100644
--- a/modules/rtp_rtcp/source/rtcp_receiver.cc
+++ b/modules/rtp_rtcp/source/rtcp_receiver.cc
@@ -365,11 +365,13 @@ RTCPReceiver::ConsumeReceivedXrReferenceTimeInfo() {
 
 void RTCPReceiver::RemoteRTCPSenderInfo(uint32_t* packet_count,
                                         uint32_t* octet_count,
-                                        int64_t* ntp_timestamp_ms) const {
+                                        int64_t* ntp_timestamp_ms,
+                                        int64_t* remote_ntp_timestamp_ms) const {
   MutexLock lock(&rtcp_receiver_lock_);
   *packet_count = remote_sender_packet_count_;
   *octet_count = remote_sender_octet_count_;
-  *ntp_timestamp_ms = remote_sender_ntp_time_.ToMs();
+  *ntp_timestamp_ms = last_received_sr_ntp_.ToMs();
+  *remote_ntp_timestamp_ms = remote_sender_ntp_time_.ToMs();
 }
 
 std::vector<ReportBlockData> RTCPReceiver::GetLatestReportBlockData() const {
diff --git a/modules/rtp_rtcp/source/rtcp_receiver.h b/modules/rtp_rtcp/source/rtcp_receiver.h
index 36e117af55..7fc541585c 100644
--- a/modules/rtp_rtcp/source/rtcp_receiver.h
+++ b/modules/rtp_rtcp/source/rtcp_receiver.h
@@ -120,7 +120,8 @@ class RTCPReceiver final {
   // Get received sender packet and octet counts
   void RemoteRTCPSenderInfo(uint32_t* packet_count,
                             uint32_t* octet_count,
-                            int64_t* ntp_timestamp_ms) const;
+                            int64_t* ntp_timestamp_ms,
+                            int64_t* remote_ntp_timestamp_ms) const;
 
   absl::optional<TimeDelta> AverageRtt() const;
   absl::optional<TimeDelta> LastRtt() const;
diff --git a/modules/rtp_rtcp/source/rtp_rtcp_impl.cc b/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
index 18508a4554..cca9a40250 100644
--- a/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
+++ b/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
@@ -499,11 +499,11 @@ void ModuleRtpRtcpImpl::GetSendStreamDataCounters(
 }
 
 // Received RTCP report.
-void ModuleRtpRtcpImpl::RemoteRTCPSenderInfo(uint32_t* packet_count,
-                                             uint32_t* octet_count,
-                                             int64_t* ntp_timestamp_ms) const {
-  return rtcp_receiver_.RemoteRTCPSenderInfo(packet_count, octet_count,
-                                             ntp_timestamp_ms);
+void ModuleRtpRtcpImpl::RemoteRTCPSenderInfo(
+    uint32_t* packet_count, uint32_t* octet_count, int64_t* ntp_timestamp_ms,
+    int64_t* remote_ntp_timestamp_ms) const {
+  return rtcp_receiver_.RemoteRTCPSenderInfo(
+      packet_count, octet_count, ntp_timestamp_ms, remote_ntp_timestamp_ms);
 }
 
 std::vector<ReportBlockData> ModuleRtpRtcpImpl::GetLatestReportBlockData()
diff --git a/modules/rtp_rtcp/source/rtp_rtcp_impl.h b/modules/rtp_rtcp/source/rtp_rtcp_impl.h
index 742a69cce3..0b1266a2db 100644
--- a/modules/rtp_rtcp/source/rtp_rtcp_impl.h
+++ b/modules/rtp_rtcp/source/rtp_rtcp_impl.h
@@ -184,7 +184,8 @@ class ABSL_DEPRECATED("") ModuleRtpRtcpImpl
 
   void RemoteRTCPSenderInfo(uint32_t* packet_count,
                             uint32_t* octet_count,
-                            int64_t* ntp_timestamp_ms) const override;
+                            int64_t* ntp_timestamp_ms,
+                            int64_t* remote_ntp_timestamp_ms) const override;
 
   // A snapshot of the most recent Report Block with additional data of
   // interest to statistics. Used to implement RTCRemoteInboundRtpStreamStats.
diff --git a/modules/rtp_rtcp/source/rtp_rtcp_impl2.cc b/modules/rtp_rtcp/source/rtp_rtcp_impl2.cc
index d7e3c50f82..31e8b71117 100644
--- a/modules/rtp_rtcp/source/rtp_rtcp_impl2.cc
+++ b/modules/rtp_rtcp/source/rtp_rtcp_impl2.cc
@@ -503,11 +503,11 @@ void ModuleRtpRtcpImpl2::GetSendStreamDataCounters(
 }
 
 // Received RTCP report.
-void ModuleRtpRtcpImpl2::RemoteRTCPSenderInfo(uint32_t* packet_count,
-                                             uint32_t* octet_count,
-                                             int64_t* ntp_timestamp_ms) const {
-  return rtcp_receiver_.RemoteRTCPSenderInfo(packet_count, octet_count,
-                                             ntp_timestamp_ms);
+void ModuleRtpRtcpImpl2::RemoteRTCPSenderInfo(
+    uint32_t* packet_count, uint32_t* octet_count, int64_t* ntp_timestamp_ms,
+    int64_t* remote_ntp_timestamp_ms) const {
+  return rtcp_receiver_.RemoteRTCPSenderInfo(
+      packet_count, octet_count, ntp_timestamp_ms, remote_ntp_timestamp_ms);
 }
 
 std::vector<ReportBlockData> ModuleRtpRtcpImpl2::GetLatestReportBlockData()
diff --git a/modules/rtp_rtcp/source/rtp_rtcp_impl2.h b/modules/rtp_rtcp/source/rtp_rtcp_impl2.h
index a9d18ec44a..54ca61a705 100644
--- a/modules/rtp_rtcp/source/rtp_rtcp_impl2.h
+++ b/modules/rtp_rtcp/source/rtp_rtcp_impl2.h
@@ -196,7 +196,8 @@ class ModuleRtpRtcpImpl2 final : public RtpRtcpInterface,
 
   void RemoteRTCPSenderInfo(uint32_t* packet_count,
                             uint32_t* octet_count,
-                            int64_t* ntp_timestamp_ms) const override;
+                            int64_t* ntp_timestamp_ms,
+                            int64_t* remote_ntp_timestamp_ms) const override;
 
   // A snapshot of the most recent Report Block with additional data of
   // interest to statistics. Used to implement RTCRemoteInboundRtpStreamStats.
diff --git a/modules/rtp_rtcp/source/rtp_rtcp_interface.h b/modules/rtp_rtcp/source/rtp_rtcp_interface.h
index 2c56dccd2a..f196d11b58 100644
--- a/modules/rtp_rtcp/source/rtp_rtcp_interface.h
+++ b/modules/rtp_rtcp/source/rtp_rtcp_interface.h
@@ -391,10 +391,11 @@ class RtpRtcpInterface : public RtcpFeedbackSenderInterface {
       StreamDataCounters* rtx_counters) const = 0;
 
 
-  // Returns packet count, octet count, and timestamp from RTCP sender report.
+  // Returns packet count, octet count, and timestamps from RTCP sender report.
   virtual void RemoteRTCPSenderInfo(uint32_t* packet_count,
                                     uint32_t* octet_count,
-                                    int64_t* ntp_timestamp_ms) const = 0;
+                                    int64_t* ntp_timestamp_ms,
+                                    int64_t* remote_ntp_timestamp_ms) const = 0;
   // A snapshot of Report Blocks with additional data of interest to statistics.
   // Within this list, the sender-source SSRC pair is unique and per-pair the
   // ReportBlockData represents the latest Report Block that was received for
diff --git a/video/rtp_video_stream_receiver2.cc b/video/rtp_video_stream_receiver2.cc
index 0a215f79cc..47c31812f3 100644
--- a/video/rtp_video_stream_receiver2.cc
+++ b/video/rtp_video_stream_receiver2.cc
@@ -1071,9 +1071,10 @@ absl::optional<int64_t> RtpVideoStreamReceiver2::LastReceivedKeyframePacketMs()
 // seem to be any support for these stats right now. So, we hack this in.
 void RtpVideoStreamReceiver2::RemoteRTCPSenderInfo(
     uint32_t* packet_count, uint32_t* octet_count,
-    int64_t* ntp_timestamp_ms) const {
+    int64_t* ntp_timestamp_ms, int64_t* remote_ntp_timestamp_ms) const {
   RTC_DCHECK_RUN_ON(&worker_task_checker_);
-  rtp_rtcp_->RemoteRTCPSenderInfo(packet_count, octet_count, ntp_timestamp_ms);
+  rtp_rtcp_->RemoteRTCPSenderInfo(packet_count, octet_count, ntp_timestamp_ms,
+                                  remote_ntp_timestamp_ms);
 }
 
 void RtpVideoStreamReceiver2::ManageFrame(
diff --git a/video/rtp_video_stream_receiver2.h b/video/rtp_video_stream_receiver2.h
index be8bce770f..0e96d7f2cd 100644
--- a/video/rtp_video_stream_receiver2.h
+++ b/video/rtp_video_stream_receiver2.h
@@ -211,7 +211,8 @@ class RtpVideoStreamReceiver2 : public LossNotificationSender,
   // stats at all, and even on the most recent libwebrtc code there does not
   // seem to be any support for these stats right now. So, we hack this in.
   void RemoteRTCPSenderInfo(uint32_t* packet_count, uint32_t* octet_count,
-                            int64_t* ntp_timestamp_ms) const;
+                            int64_t* ntp_timestamp_ms,
+                            int64_t* remote_ntp_timestamp_ms) const;
 
  private:
   // Implements RtpVideoFrameReceiver.
diff --git a/video/video_receive_stream2.cc b/video/video_receive_stream2.cc
index 776c49042b..c04b43a1d1 100644
--- a/video/video_receive_stream2.cc
+++ b/video/video_receive_stream2.cc
@@ -576,7 +576,8 @@ VideoReceiveStreamInterface::Stats VideoReceiveStream2::GetStats() const {
   // seem to be any support for these stats right now. So, we hack this in.
   rtp_video_stream_receiver_.RemoteRTCPSenderInfo(
       &stats.rtcp_sender_packets_sent, &stats.rtcp_sender_octets_sent,
-      &stats.rtcp_sender_ntp_timestamp_ms);
+      &stats.rtcp_sender_ntp_timestamp_ms,
+      &stats.rtcp_sender_remote_ntp_timestamp_ms);
 
   return stats;
 }