Change TWCC send interval to reduce overhead on low BW situations.

webrtc/modules/remote_bitrate_estimator/remote_estimator_proxy.h

Index: webrtc/modules/remote_bitrate_estimator/remote_estimator_proxy.h
diff --git a/webrtc/modules/remote_bitrate_estimator/remote_estimator_proxy.h b/webrtc/modules/remote_bitrate_estimator/remote_estimator_proxy.h
index 127886300d8f95c2fd14d78ebc0ffae9ee5c1094..9930313b4f4b8a132df752844f2d880996179c12 100644
--- a/webrtc/modules/remote_bitrate_estimator/remote_estimator_proxy.h
+++ b/webrtc/modules/remote_bitrate_estimator/remote_estimator_proxy.h
@@ -12,9 +12,11 @@
 #define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_REMOTE_ESTIMATOR_PROXY_H_
 
 #include <map>
+#include <memory>
 #include <vector>
 
 #include "webrtc/base/criticalsection.h"
+#include "webrtc/base/ratetracker.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/remote_bitrate_estimator/include/remote_bitrate_estimator.h"
 
@@ -32,7 +34,10 @@ class TransportFeedback;
 
 class RemoteEstimatorProxy : public RemoteBitrateEstimator {
  public:
-  RemoteEstimatorProxy(Clock* clock, PacketRouter* packet_router);
+  RemoteEstimatorProxy(
+      Clock* clock,
+      PacketRouter* packet_router,
+      std::unique_ptr<rtc::RateTracker> recieved_bitrate_tracker);
   virtual ~RemoteEstimatorProxy();
 
   void IncomingPacketFeedbackVector(
@@ -48,7 +53,11 @@ class RemoteEstimatorProxy : public RemoteBitrateEstimator {
   int64_t TimeUntilNextProcess() override;
   void Process() override;
 
-  static const int kDefaultProcessIntervalMs;
+  static const int kHighBitrateProcessIntervalMs;
+  static const int kLowBitrateProcessIntervalMs;
+  static const int kSwitchToLowBitrateProcessIntervalBps;
+  static const int kSwitchToHighBitrateProcessIntervalBps;
+  static const int kMinPacketCountRecievedBitrate;
   static const int kBackWindowMs;
 
  private:
@@ -68,6 +77,9 @@ class RemoteEstimatorProxy : public RemoteBitrateEstimator {
   int64_t window_start_seq_ GUARDED_BY(&lock_);
   // Map unwrapped seq -> time.
   std::map<int64_t, int64_t> packet_arrival_times_ GUARDED_BY(&lock_);
+  int process_interval_ms_;
+  std::unique_ptr<rtc::RateTracker> received_bitrate_tracker_bps_
+      GUARDED_BY(&lock_);
 };
 
 }  // namespace webrtc