copy srt official packet recve rate algorithm

srt/Statistic.hpp

@@ -6,18 +6,19 @@
 #include "Packet.hpp"
 
 namespace SRT {
-
 class PacketRecvRateContext {
 public:
-    PacketRecvRateContext(TimePoint start)
-        : _start(start) {};
+    PacketRecvRateContext(TimePoint start);
     ~PacketRecvRateContext() = default;
-    void inputPacket(TimePoint &ts);
-    uint32_t getPacketRecvRate();
-
+    void inputPacket(TimePoint &ts,size_t len = 0);
+    uint32_t getPacketRecvRate(uint32_t& bytesps);
+    static const int SIZE = 16;
 private:
-    TimePoint _start;
-    std::map<int64_t, int64_t> _pkt_map;
+    TimePoint _last_arrive_time;
+    int64_t _ts_arr[SIZE];
+    size_t _size_arr[SIZE];
+    size_t _cur_idx;
+    //std::map<int64_t, int64_t> _pkt_map;
 };
 
 class EstimatedLinkCapacityContext {
@@ -32,6 +33,7 @@ private:
     std::map<int64_t, int64_t> _pkt_map;
 };
 
+/*
 class RecvRateContext {
 public:
     RecvRateContext(TimePoint start)
@@ -44,6 +46,6 @@ private:
     TimePoint _start;
     std::map<int64_t, size_t> _pkt_map;
 };
-
+*/
 } // namespace SRT
 #endif // ZLMEDIAKIT_SRT_STATISTIC_H