这里附上部分rtcp代码
void CRtcpPack::FillRReportInfo(uint32_t ssrc,uint32_t expectpack,uint32_t getpack,uint32_t exthighestseq,uint32_t jitter,BOOL bfirst)
{
//prtcpreceiverReport 为RR包结构体
if(prtcpreceiverReport != NULL)
{
delete prtcpreceiverReport;
prtcpreceiverReport=NULL;
}
prtcpreceiverReport =(RTCPReceiverReport*)malloc(sizeof(struct RTCPReceiverReport));
prtcpreceiverReport->ssrc = ssrc;
double lost = (double)(expectpack-getpack);
double frac = lost/((double)expectpack);
if(expectpack < getpack)
prtcpreceiverReport->fractionlost = 0;
prtcpreceiverReport->fractionlost = (uint8_t)(frac*256.0);
prtcpreceiverReport->exthighseqnr = exthighestseq;
prtcpreceiverReport->jitter = jitter;
if(bfirst)
{
prtcpreceiverReport->lsr = 0;
prtcpreceiverReport->dlsr = 0;
}
else
{
RTPNTPTime srtime = m_tc.GetNTPTime(); //得到NTP时间 ，m_tc为 接受到SR包的时间
uint32_t m = (srtime.GetMSW()&0xFFFF);
uint32_t l = ((srtime.GetLSW()>>16)&0xFFFF);
prtcpreceiverReport->lsr = ((m<<16)|l);
RTPTime curtime = RTPTime::CurrentTime(); //当前时间
curtime -= m_tc.GetNTPTime();
double diff2 = curtime.GetDouble();
diff2 *= 65536.0;
prtcpreceiverReport->dlsr = (uint32_t)diff2;
}
}
