Added Util::packetSorter with async/sync modes, set DTSC outputs to use async mode

lib/stream.h

@@ -50,6 +50,39 @@ namespace Util{
   extern trackSortOrder defaultTrackSortOrder;
   void sortTracks(std::set<size_t> & validTracks, const DTSC::Meta & M, trackSortOrder sorting, std::list<size_t> & srtTrks);
 
+  /// This struct keeps packet information sorted in playback order
+  struct sortedPageInfo{
+    bool operator<(const sortedPageInfo &rhs) const{
+      if (time < rhs.time){return true;}
+      return (time == rhs.time && tid < rhs.tid);
+    }
+    size_t tid;
+    uint64_t time;
+    uint64_t offset;
+    size_t partIndex;
+  };
+
+  /// Packet sorter used to determine which packet should be output next
+  class packetSorter{
+    public:
+      packetSorter();
+      size_t size() const;
+      void clear();
+      const sortedPageInfo * begin() const;
+      void insert(const sortedPageInfo &pInfo);
+      void dropTrack(size_t tid);
+      void replaceFirst(const sortedPageInfo &pInfo);
+      void moveFirstToEnd();
+      bool hasEntry(size_t tid) const;
+      void getTrackList(std::set<size_t> &toFill) const;
+      void setSyncMode(bool synced);
+      bool getSyncMode() const;
+    private:
+      bool dequeMode;
+      std::deque<sortedPageInfo> dequeBuffer;
+      std::set<sortedPageInfo> setBuffer;
+  };
+
 
   class DTSCShmReader{
   public: