ldgm-session.h

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/*
 * =====================================================================================
 *
 *       Filename:  ldgm-session.h
 *
 *    Description:  LDGM coding session
 *
 *        Version:  1.0
 *        Created:  04/12/2012 11:05:35 AM
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Milan Kabat (), kabat@ics.muni.cz
 *   Organization:  
 *
 * =====================================================================================
 */
 
 
#include <stdint.h>
 
#include "coding-session.h"
#include "tanner.h"
 
 
#ifndef  LDGM_SESSION_INC
#define  LDGM_SESSION_INC
 
class LDGM_session : public Coding_session
{
    public:
        /* ====================  LIFECYCLE     ======================================= */
        LDGM_session () :                          /* constructor **/
                pcMatrix(NULL), pcm(NULL), param_k(0), param_m(0), row_weight(0),
                packet_size(0), max_row_weight(0), received_ptr(NULL),
                lost_ptr(NULL), elapsed_sum2(0.0), no_frames2(0)
        {
        }
        virtual ~LDGM_session ();                      /* destructor **/
 
        /* ====================  ACCESSORS     ======================================= */
        bool
            needs_decoding ( Tanner_graph *tanner_graph );
 
        unsigned int 
            get_packet_size () const
            {
                return packet_size;
            }
 
        void
            set_pcMatrix ( char * matrix );
 
        /* ====================  OPERATORS     ======================================= */
 
        void
            create_edges ( Tanner_graph *g);
 
        char*
            encode_frame ( char* frame, int frame_size, int* out_buf_size );
 
        char*
            encode_hdr_frame( char *hdr, int hdr_size, char* frame, int frame_size, int* out_buf_size );
 
        virtual void
            encode ( char* data, char* parity ) = 0;
        
        virtual void
            encode_naive ( char* data, char* parity ) = 0;
 
        virtual void *
                alloc_buf(int size) = 0;
 
        virtual char*
            decode_frame ( char* received_data, int buf_size, int* frame_size, 
                    std::map<int, int>  valid_data ) = 0;
 
        void
            set_params ( unsigned short k,
                         unsigned short m,
                         unsigned short rw
                    )
            {
                param_k = k;
                param_m = m;
                row_weight = rw;
            }
 
        virtual void
            free_out_buf (char *buf) = 0;
                    
 
    protected:
        /* ====================  DATA MEMBERS  ======================================= */
 
        char* pcMatrix;
        int *pcm; //compact
 
        unsigned short param_k;
        unsigned short param_m;
        unsigned short row_weight;
        unsigned short packet_size;
        unsigned short max_row_weight;
 
        char *received_ptr;
        char *lost_ptr;
 
        double elapsed_sum2;
        long no_frames2;
 
        static const int HEADER_SIZE = 4;
 
    private:
 
 
 
        /* ====================  DATA MEMBERS  ======================================= */
 
}; /* -----  end of class LDGM_session  ----- */
 
#endif   /* ----- #ifndef LDGM_SESSION_INC  ----- */