More Simulation Framework features

webrtc/modules/remote_bitrate_estimator/test/bwe.h

Index: webrtc/modules/remote_bitrate_estimator/test/bwe.h
diff --git a/webrtc/modules/remote_bitrate_estimator/test/bwe.h b/webrtc/modules/remote_bitrate_estimator/test/bwe.h
index d059871488bec092c836bf9692c34bdcc4f2c06f..3e3039638989c8ef82a74b1a3c65f40f42915fd6 100644
--- a/webrtc/modules/remote_bitrate_estimator/test/bwe.h
+++ b/webrtc/modules/remote_bitrate_estimator/test/bwe.h
@@ -15,6 +15,7 @@
 
 #include "webrtc/modules/remote_bitrate_estimator/test/packet.h"
 #include "webrtc/modules/bitrate_controller/include/bitrate_controller.h"
+#include "webrtc/modules/remote_bitrate_estimator/test/bwe_test_framework.h"
 
 namespace webrtc {
 namespace testing {
@@ -56,20 +57,31 @@ class LinkedSet {
               int64_t arrival_time_ms,
               size_t payload_size);
 
+  void Insert(PacketIdentifierNode packet_identifier);
+
   PacketNodeIt begin() { return list_.begin(); }
   PacketNodeIt end() { return list_.end(); }
+
   bool empty() { return list_.empty(); }
   size_t size() { return list_.size(); }
-  // Gets the latest arrived sequence number.
-  uint16_t find_max() { return map_.rbegin()->first; }
-  // Gets the first arrived sequence number still saved in the LinkedSet.
-  uint16_t find_min() { return map_.begin()->first; }
-  // Gets the lowest saved sequence number that is >= than the input key.
-  uint16_t lower_bound(uint16_t key) { return map_.lower_bound(key)->first; }
-  // Gets the highest saved sequence number that is <= than the input key.
-  uint16_t upper_bound(uint16_t key) { return map_.upper_bound(key)->first; }
   size_t capacity() { return capacity_; }
 
+  // Gets the highest (absolute value) sequence number.
+  uint16_t Max() { return empty() ? 0 : map_.rbegin()->first; }
+  // Gets the lowest (absolute value) sequence number still saved in the
+  // LinkedSet.
+  uint16_t Min() { return empty() ? 0 : map_.begin()->first; }
+
+  uint16_t OldestSeqNumber();
+  uint16_t NewestSeqNumber();
+
+  void Clear() {
+    map_.clear();
+    list_.clear();
+  }
+
+  void Erase(PacketNodeIt node_it);
+
  private:
   // Pop oldest element from the back of the list and remove it from the map.
   void RemoveTail();
@@ -80,17 +92,35 @@ class LinkedSet {
   std::list<PacketIdentifierNode*> list_;
 };
 
-const int kMinBitrateKbps = 150;
-const int kMaxBitrateKbps = 3000;
+// Holds information for computing global packet loss.
+struct LossAccount {
+  LossAccount() : num_total(0), num_lost(0) {}
+  LossAccount(size_t num_total, size_t num_lost)
+      : num_total(num_total), num_lost(num_lost) {}
+  void Add(LossAccount rhs);
+  void Subtract(LossAccount rhs);
+  float LossRatio();
+  size_t num_total;
+  size_t num_lost;
+};
+
+const int kMinBitrateKbps = 30;
+const int kMaxBitrateKbps = 2500;
 
 class BweSender : public Module {
  public:
-  BweSender() {}
+  BweSender() : running_(true) {}
   virtual ~BweSender() {}
 
   virtual int GetFeedbackIntervalMs() const = 0;
   virtual void GiveFeedback(const FeedbackPacket& feedback) = 0;
   virtual void OnPacketsSent(const Packets& packets) = 0;
+  virtual void Pause();
+  virtual void Resume();
+
+ protected:
+  bool running_;
+  int bitrate_kbps_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BweSender);
@@ -105,26 +135,45 @@ class BweReceiver {
                              const MediaPacket& media_packet) {}
   virtual FeedbackPacket* GetFeedback(int64_t now_ms) { return NULL; }
 
-  float GlobalPacketLossRatio();
-  float RecentPacketLossRatio();
   size_t GetSetCapacity() { return received_packets_.capacity(); }
 
+  uint32_t RecentKbps();  // Receiving Rate calculated over latest 1000ms.
+  // Packet loss only for packets arriving in the latest 500ms time window.
+  float RecentPacketLossRatio();  // Plot dynamics.
+  // Computes packet loss during an entire simulation, up to 4 billion packets.
+  float GlobalReceiverPacketLossRatio();  // Plot histogram.
+
   static const int64_t kPacketLossTimeWindowMs = 500;
+  static const int64_t kReceivingRateTimeWindowMs = 1000;
 
  protected:
+  void RelieveSetAndUpdateLoss();
   int flow_id_;
   // Deals with packets sent more than once.
   LinkedSet received_packets_;
+  // Used for calculating recent receiving rate.
+  RateCounter rate_counter_;
+
+ private:
+  void UpdateLoss();
+  void ClearSet();
+  // Packet loss for packets stored in the LinkedSet, up to 1000 packets.
+  // Used to update global loss account whenever the set is filled and cleared.
+  LossAccount LinkedSetPacketLossRatio();
+  // Used for calculating global packet loss ratio.
+  LossAccount loss_account;
 };
 
 enum BandwidthEstimatorType {
-  kNullEstimator,
+  kNullEstimator = 0,
   kNadaEstimator,
   kRembEstimator,
   kFullSendSideEstimator,
   kTcpEstimator
 };
 
+const std::string bwe_names[] = {"Null", "NADA", "REMB", "GCC", "TCP"};
+
 int64_t GetAbsSendTimeInMs(uint32_t abs_send_time);
 
 BweSender* CreateBweSender(BandwidthEstimatorType estimator,
@@ -135,6 +184,7 @@ BweSender* CreateBweSender(BandwidthEstimatorType estimator,
 BweReceiver* CreateBweReceiver(BandwidthEstimatorType type,
                                int flow_id,
                                bool plot);
+
 }  // namespace bwe
 }  // namespace testing
 }  // namespace webrtc