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/* Imported from the dvbstream-0.2 project */
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include "config.h"
#ifndef HAVE_WINSOCK2
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
/* MPEG-2 TS RTP stack */
#define DEBUG 1
#include "rtp.h"
int getrtp2(int fd, struct rtpheader *rh, char** data, int* lengthData) {
static char buf[1600];
unsigned int intP;
char* charP = (char*) &intP;
int headerSize;
int lengthPacket;
lengthPacket=recv(fd,buf,1590,0);
if (lengthPacket==0)
exit(1);
if (lengthPacket<0) {
fprintf(stderr,"socket read error\n");
exit(2);
}
if (lengthPacket<12) {
fprintf(stderr,"packet too small (%d) to be an rtp frame (>12bytes)\n", lengthPacket);
exit(3);
}
rh->b.v = (unsigned int) ((buf[0]>>6)&0x03);
rh->b.p = (unsigned int) ((buf[0]>>5)&0x01);
rh->b.x = (unsigned int) ((buf[0]>>4)&0x01);
rh->b.cc = (unsigned int) ((buf[0]>>0)&0x0f);
rh->b.m = (unsigned int) ((buf[1]>>7)&0x01);
rh->b.pt = (unsigned int) ((buf[1]>>0)&0x7f);
intP = 0;
memcpy(charP+2,&buf[2],2);
rh->b.sequence = ntohl(intP);
intP = 0;
memcpy(charP,&buf[4],4);
rh->timestamp = ntohl(intP);
headerSize = 12 + 4*rh->b.cc; /* in bytes */
*lengthData = lengthPacket - headerSize;
*data = (char*) buf + headerSize;
// fprintf(stderr,"Reading rtp: v=%x p=%x x=%x cc=%x m=%x pt=%x seq=%x ts=%x lgth=%d\n",rh->b.v,rh->b.p,rh->b.x,rh->b.cc,rh->b.m,rh->b.pt,rh->b.sequence,rh->timestamp,lengthPacket);
return(0);
}
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