first commit for srt intergrate

srt/PacketQueue.hpp

@@ -0,0 +1,44 @@
+#ifndef ZLMEDIAKIT_SRT_PACKET_QUEUE_H
+#define ZLMEDIAKIT_SRT_PACKET_QUEUE_H
+#include <memory>
+#include <map>
+#include <list>
+#include <utility>
+#include <tuple>
+
+#include "Packet.hpp"
+
+namespace SRT{
+
+class PacketQueue
+{
+public:
+    using Ptr = std::shared_ptr<PacketQueue>;
+    using LostPair = std::pair<uint32_t,uint32_t>;
+
+    PacketQueue(uint32_t max_size,uint32_t init_seq,uint32_t lantency);
+    ~PacketQueue() = default;
+    bool inputPacket(DataPacket::Ptr pkt);
+    std::list<DataPacket::Ptr> tryGetPacket();
+    uint32_t timeLantency();
+    std::list<LostPair> getLostSeq();
+
+    size_t getSize();
+    size_t getExpectedSize();
+    size_t getAvailableBufferSize();
+    uint32_t getExpectedSeq();
+
+    bool dropForRecv(uint32_t first,uint32_t last);
+    
+    
+private:
+    std::map<uint32_t,DataPacket::Ptr> _pkt_map;
+
+    uint32_t _pkt_expected_seq = 0;
+    uint32_t _pkt_cap;
+    uint32_t _pkt_lantency;
+};
+
+}
+
+#endif //ZLMEDIAKIT_SRT_PACKET_QUEUE_H