FrameBuffer.h

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#ifndef SZA_UTIL_FRAMEBUFFER_H
#define SZA_UTIL_FRAMEBUFFER_H

#include <vector>
#include <map>
#include "carma/szautil/Mutex.h"

namespace sza {
  namespace util {
    
    class DataFrameManager;
    
    class FrameBuffer {
    public:
      
      FrameBuffer(unsigned nFrame);
      
      virtual ~FrameBuffer();
      
      DataFrameManager* getFrame(unsigned int id, bool create);
      
      DataFrameManager* getNextFrame();
      
      DataFrameManager* dispatchNextFrame();
      
      unsigned int getNframesInQueue();

    protected:
      
      struct FrameBufferSlot {
        unsigned int id_;
        DataFrameManager* frame_;
        struct FrameBufferSlot* next_;
      };
      
      std::vector<struct FrameBufferSlot> slots_;

      unsigned long nSlot_;           
      
    private:
      
      Mutex guard_;

      std::map<unsigned int, struct FrameBufferSlot*> frameMap_;
      
      struct FrameBufferSlot* nextFreeSlot_;    
      
      struct FrameBufferSlot* nextSendSlot_;    
      
      struct FrameBufferSlot* lastSentSlot_;    
      
      unsigned long nUsed_;            
      
      struct FrameBufferSlot* findSlot(unsigned int id);

      struct FrameBufferSlot* getNextSlot();
      
      void clearSlot(FrameBufferSlot* slot);

    }; // End class FrameBuffer
    
  } // End namespace util
} // End namespace sza

#endif // End #ifndef SZA_UTIL_FRAMEBUFFER_H