Add AlrDetector

webrtc/modules/pacing/paced_sender.cc

Index: webrtc/modules/pacing/paced_sender.cc
diff --git a/webrtc/modules/pacing/paced_sender.cc b/webrtc/modules/pacing/paced_sender.cc
index fe918bbbb345221e32007db84b89e6e6753210c7..387276908ca404c72aa21bff744225d7ec78cc47 100644
--- a/webrtc/modules/pacing/paced_sender.cc
+++ b/webrtc/modules/pacing/paced_sender.cc
@@ -245,9 +245,12 @@ class IntervalBudget {
 const int64_t PacedSender::kMaxQueueLengthMs = 2000;
 const float PacedSender::kDefaultPaceMultiplier = 2.5f;
 
-PacedSender::PacedSender(Clock* clock, PacketSender* packet_sender)
+PacedSender::PacedSender(Clock* clock,
+                         PacketSender* packet_sender,
+                         PacingObserver* pacing_observer)
     : clock_(clock),
       packet_sender_(packet_sender),
+      pacing_observer_(pacing_observer),
       critsect_(CriticalSectionWrapper::CreateCriticalSection()),
       paused_(false),
       media_budget_(new paced_sender::IntervalBudget(0)),
@@ -260,9 +263,12 @@ PacedSender::PacedSender(Clock* clock, PacketSender* packet_sender)
       time_last_update_us_(clock->TimeInMicroseconds()),
       packets_(new paced_sender::PacketQueue(clock)),
       packet_counter_(0) {
-  UpdateBytesPerInterval(kMinPacketLimitMs);
+  UpdateBudgetWithElapsedTime(kMinPacketLimitMs);
 }
 
+PacedSender::PacedSender(Clock* clock, PacketSender* packet_sender)
+    : PacedSender(clock, packet_sender, nullptr) {}
+
 PacedSender::~PacedSender() {}
 
 void PacedSender::CreateProbeCluster(int bitrate_bps, int num_packets) {
@@ -397,8 +403,8 @@ void PacedSender::Process() {
 
     media_budget_->set_target_rate_kbps(target_bitrate_kbps);
 
-    int64_t delta_time_ms = std::min(kMaxIntervalTimeMs, elapsed_time_ms);
-    UpdateBytesPerInterval(delta_time_ms);
+    elapsed_time_ms = std::min(kMaxIntervalTimeMs, elapsed_time_ms);
+    UpdateBudgetWithElapsedTime(elapsed_time_ms);
   }
 
   bool is_probing = prober_->IsProbing();
@@ -443,6 +449,8 @@ void PacedSender::Process() {
   }
   if (is_probing && bytes_sent > 0)
     prober_->ProbeSent(clock_->TimeInMilliseconds(), bytes_sent);
+  if (pacing_observer_)
+    pacing_observer_->OnBytesSent(bytes_sent, elapsed_time_ms);
 }
 
 bool PacedSender::SendPacket(const paced_sender::Packet& packet,
@@ -469,8 +477,7 @@ bool PacedSender::SendPacket(const paced_sender::Packet& packet,
     // are allocating bandwidth for audio.
     if (packet.priority != kHighPriority) {
       // Update media bytes sent.
-      media_budget_->UseBudget(packet.bytes);
-      padding_budget_->UseBudget(packet.bytes);
+      UpdateBudgetWithBytesSent(packet.bytes);
     }
   }
 
@@ -484,14 +491,18 @@ size_t PacedSender::SendPadding(size_t padding_needed, int probe_cluster_id) {
   critsect_->Enter();
 
   if (bytes_sent > 0) {
-    media_budget_->UseBudget(bytes_sent);
-    padding_budget_->UseBudget(bytes_sent);
+    UpdateBudgetWithBytesSent(bytes_sent);
   }
   return bytes_sent;
 }
 
-void PacedSender::UpdateBytesPerInterval(int64_t delta_time_ms) {
+void PacedSender::UpdateBudgetWithElapsedTime(int64_t delta_time_ms) {
   media_budget_->IncreaseBudget(delta_time_ms);
   padding_budget_->IncreaseBudget(delta_time_ms);
 }
+
+void PacedSender::UpdateBudgetWithBytesSent(size_t bytes_sent) {
+  media_budget_->UseBudget(bytes_sent);
+  padding_budget_->UseBudget(bytes_sent);
+}
 }  // namespace webrtc