#ifndef RTPDATAHEADER_H

#define RTPDATAHEADER_H

// For 32bit intel machines

typedef short int16;

typedef int   int32;

typedef unsigned int u_int32;

typedef unsigned short u_int16;

#define RTP_BIG_ENDIAN 0

#define RTP_LITTLE_ENDIAN 1

//  RTP data header

//typedef __attribute__ ((__packed__)) struct {

typedef struct {

#if RTP_BIG_ENDIAN

    unsigned int version:;         // protocol version

    unsigned int p:;               // padding flag

    unsigned int x:;               // header extension flag

    unsigned int cc:;              // CSRC count

    unsigned int m:;               // marker bit

    unsigned int pt:;              // payload type

#elif RTP_LITTLE_ENDIAN

    unsigned int cc:;              // CSRC count

    unsigned int x:;               // header extension flag

    unsigned int p:;               // padding flag

    unsigned int version:;         // protocol version

    unsigned int pt:;              // payload type

    unsigned int m:;               // marker bit

#else

#error Define one of RTP_LITTLE_ENDIAN or RTP_BIG_ENDIAN

#endif

    unsigned int seq:;            // sequence number

    u_int32 ts;                     // timestamp 32bits

    u_int32 ssrc;                   // synchronization source

} rtp_hdr_t;

#endif

//判断大小端
typedef unsigned char BYTE;
int main(int argc, char* argv[])
{
   unsigned int num,*p;
   p = #
   num = 0;
   *(BYTE *)p = 0xff;
   if(num == 0xff)
   {
      printf("little\n");
   }
   else //num == 0xff000000

   {
      printf("big\n");
   }
   return 0;
}