PacketTypes.h

/***************************************************************************
 * \file PacketTypes.h
 *
 * \brief Defines data structures for handling VITA 49-formatted data packets.
 *
 * \author NH
 * \copyright Copyright (c) 2015-2021 CyberRadio Solutions, Inc.
 *
 */
 
#ifndef INCLUDED_LIBCYBERRADIO_NDR651_PACKETTYPES_H_
#define INCLUDED_LIBCYBERRADIO_NDR651_PACKETTYPES_H_
 
#include <linux/if_ether.h>
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <stdint.h>
 
#define SAMPLES_PER_FRAME 1024
 
#define VRLP 0x56524c50
#define VEND 0x56454e44

namespace LibCyberRadio
{
    namespace NDR651
    {

        struct Vita49Header {
                uint32_t frameStart;     
                uint32_t frameSize:20;   
                uint32_t frameCount:12;  
                uint16_t packetSize;     
                uint16_t packetCount:4;  
                uint16_t TSF:2;          
                uint16_t TSI:2;          
                uint16_t RSVD:2;         
                uint16_t T:1;            
                uint16_t C:1;            
                uint16_t packetType:4;   
                uint32_t streamId;       
                uint32_t classId1;
                uint32_t classId2;
                uint32_t timeSeconds;    
                uint32_t timeFracSecMSB; 
                uint32_t timeFracSecLSB; 
        } __attribute__((packed));

        struct Payload {
                int16_t samples[2*SAMPLES_PER_FRAME];  
        } __attribute__((packed));

        struct Vita49Trailer {
                uint32_t frameEnd;          
        } __attribute__((packed));

        struct TxFrame {
                struct ethhdr eth;          
                struct iphdr ip;            
                struct udphdr udp;          
                struct Vita49Header v49;    
                struct Payload payload;     
                struct Vita49Trailer vend;  
        } __attribute__((aligned));

        struct TxStatusPayload {
                uint32_t contextIndicator:31;  
                uint32_t CI:1;  
 
                uint32_t spaceAvailable;    
 
                uint32_t overrunCount:7;    
                uint32_t overrunFlag:1;     
                uint32_t underrunCount:7;   
                uint32_t underrunFlag:1;    
                uint32_t packetLossCount:7; 
                uint32_t packetLossFlag:1;  
                uint32_t fullFlag:1;        
                uint32_t emptyFlag:1;       
                uint32_t RSVD:6;            
 
                uint32_t PF:1;               
                uint32_t PE:1;               
                uint32_t PP:1;               
                uint32_t PAD:29;               
        } __attribute__((packed));;

        struct TxStatusFrame {
                struct Vita49Header v49;        
                struct TxStatusPayload status;  
                struct Vita49Trailer vend;      
        };
 
    }
 
}
 
#endif /* INCLUDED_LIBCYBERRADIO_NDR651_PACKETTYPES_H_ */