Remove GetSendSideDelay from RtpRtcp.

These stats are reported using a callback either way, removing a getter
+ an old related deadlock suppression.

BUG=1695, 2999
R=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/50119004

Cr-Commit-Position: refs/heads/master@{#9314}

webrtc/build/sanitizers/tsan_suppressions_webrtc.cc

@@ -73,7 +73,6 @@ char kTSanDefaultSuppressions[] =
 "deadlock:webrtc::vcm::VideoReceiver::RegisterPacketRequestCallback\n"
 "deadlock:webrtc::ViECaptureImpl::ConnectCaptureDevice\n"
 "deadlock:webrtc::ViEChannel::StartSend\n"
-"deadlock:webrtc::ViECodecImpl::GetSendSideDelay\n"
 "deadlock:webrtc::ViEEncoder::OnLocalSsrcChanged\n"
 
 // TODO(pbos): Trace events are racy due to lack of proper POD atomics.

webrtc/modules/rtp_rtcp/interface/rtp_rtcp.h

@@ -309,9 +309,6 @@ class RtpRtcp : public Module {
 
     virtual size_t TimeToSendPadding(size_t bytes) = 0;
 
-    virtual bool GetSendSideDelay(int* avg_send_delay_ms,
-                                  int* max_send_delay_ms) const = 0;
-
     // Called on generation of new statistics after an RTP send.
     virtual void RegisterSendChannelRtpStatisticsCallback(
         StreamDataCountersCallback* callback) = 0;

webrtc/modules/rtp_rtcp/mocks/mock_rtp_rtcp.h

@@ -126,8 +126,6 @@ class MockRtpRtcp : public RtpRtcp {
            bool retransmission));
   MOCK_METHOD1(TimeToSendPadding,
       size_t(size_t bytes));
-  MOCK_CONST_METHOD2(GetSendSideDelay,
-      bool(int* avg_send_delay_ms, int* max_send_delay_ms));
   MOCK_METHOD2(RegisterRtcpObservers,
       void(RtcpIntraFrameObserver* intraFrameCallback,
            RtcpBandwidthObserver* bandwidthCallback));

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc

@@ -429,13 +429,6 @@ size_t ModuleRtpRtcpImpl::TimeToSendPadding(size_t bytes) {
   return rtp_sender_.TimeToSendPadding(bytes);
 }
 
-bool ModuleRtpRtcpImpl::GetSendSideDelay(int* avg_send_delay_ms,
-                                         int* max_send_delay_ms) const {
-  DCHECK(avg_send_delay_ms);
-  DCHECK(max_send_delay_ms);
-  return rtp_sender_.GetSendSideDelay(avg_send_delay_ms, max_send_delay_ms);
-}
-
 uint16_t ModuleRtpRtcpImpl::MaxPayloadLength() const {
   return rtp_sender_.MaxPayloadLength();
 }

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.h

@@ -122,9 +122,6 @@ class ModuleRtpRtcpImpl : public RtpRtcp {
   // less than |bytes|.
   size_t TimeToSendPadding(size_t bytes) override;
 
-  bool GetSendSideDelay(int* avg_send_delay_ms,
-                        int* max_send_delay_ms) const override;
-
   // RTCP part.
 
   // Get RTCP status.

webrtc/modules/rtp_rtcp/source/rtp_sender.cc

@@ -219,23 +219,6 @@ uint32_t RTPSender::NackOverheadRate() const {
   return nack_bitrate_.BitrateLast();
 }
 
-bool RTPSender::GetSendSideDelay(int* avg_send_delay_ms,
-                                 int* max_send_delay_ms) const {
-  CriticalSectionScoped lock(statistics_crit_.get());
-  SendDelayMap::const_iterator it = send_delays_.upper_bound(
-      clock_->TimeInMilliseconds() - kSendSideDelayWindowMs);
-  if (it == send_delays_.end())
-    return false;
-  int num_delays = 0;
-  for (; it != send_delays_.end(); ++it) {
-    *max_send_delay_ms = std::max(*max_send_delay_ms, it->second);
-    *avg_send_delay_ms += it->second;
-    ++num_delays;
-  }
-  *avg_send_delay_ms = (*avg_send_delay_ms + num_delays / 2) / num_delays;
-  return true;
-}
-
 int32_t RTPSender::SetTransmissionTimeOffset(int32_t transmission_time_offset) {
   if (transmission_time_offset > (0x800000 - 1) ||
       transmission_time_offset < -(0x800000 - 1)) {  // Word24.
@@ -1061,6 +1044,9 @@ int32_t RTPSender::SendToNetwork(
 }
 
 void RTPSender::UpdateDelayStatistics(int64_t capture_time_ms, int64_t now_ms) {
+  if (!send_side_delay_observer_)
+    return;
+
   uint32_t ssrc;
   int avg_delay_ms = 0;
   int max_delay_ms = 0;
@@ -1075,12 +1061,19 @@ void RTPSender::UpdateDelayStatistics(int64_t capture_time_ms, int64_t now_ms) {
     send_delays_.erase(send_delays_.begin(),
                        send_delays_.lower_bound(now_ms -
                        kSendSideDelayWindowMs));
+    int num_delays = 0;
+    for (auto it = send_delays_.upper_bound(now_ms - kSendSideDelayWindowMs);
+         it != send_delays_.end(); ++it) {
+      max_delay_ms = std::max(max_delay_ms, it->second);
+      avg_delay_ms += it->second;
+      ++num_delays;
+    }
+    if (num_delays == 0)
+      return;
+    avg_delay_ms = (avg_delay_ms + num_delays / 2) / num_delays;
   }
-  if (send_side_delay_observer_ &&
-      GetSendSideDelay(&avg_delay_ms, &max_delay_ms)) {
-    send_side_delay_observer_->SendSideDelayUpdated(avg_delay_ms,
-        max_delay_ms, ssrc);
-  }
+  send_side_delay_observer_->SendSideDelayUpdated(avg_delay_ms, max_delay_ms,
+                                                  ssrc);
 }
 
 void RTPSender::ProcessBitrate() {

webrtc/modules/rtp_rtcp/source/rtp_sender.h

@@ -104,10 +104,6 @@ class RTPSender : public RTPSenderInterface {
   uint32_t FecOverheadRate() const;
   uint32_t NackOverheadRate() const;
 
-  // Returns true if the statistics have been calculated, and false if no frame
-  // was sent within the statistics window.
-  bool GetSendSideDelay(int* avg_send_delay_ms, int* max_send_delay_ms) const;
-
   void SetTargetBitrate(uint32_t bitrate);
   uint32_t GetTargetBitrate();