交流一下，如何实现jrtp传送video数据？

[上海老李]

我在发了后，收能收到数据，但是解码后发现不对，而且包也不一致，请教一下用过的人JRTP如何发送大数据？
发送端:
bool CSendRtp::send( byte* data,long len )
{
byte buff[PERPACKET];
long hid=0;
RTPTime starttime = RTPTime::CurrentTime();
//如果包比较大，则进行分包
while(len>0)
{

memset(buff,0,sizeof(buff));
if (len>PERPACKET)
{
int i=0;
while(i<PERPACKET)
{
buff[i++] =(byte) data++;
}
len=len-PERPACKET;
}
else
{
int i=0;
while(i<len)
{
buff[i++] =(byte)data++;
}
len=0;
}

session.SendPacket((void*)buff,sizeof(buff),96,false,starttime.GetMicroSeconds());

}
session.SendPacket(data,len);

return true;
}
//发送端初始化
long destip;
destip = inet_addr(ip);
if (destip == INADDR_NONE)
{
//std::cerr << "Bad IP address specified" << std::endl;
return false;
}

destip = ntohl(destip);
//sessionparams.SetOwnTimestampUnit(1.0/10.0);
sessionparams.SetOwnTimestampUnit(1.0/8000.0);

sessionparams.SetAcceptOwnPackets(true);
transparams.SetPortbase(0);
int status = session.Create(sessionparams,&transparams);
//checkerror(status);

RTPIPv4Address addr(destip,port);

status = session.AddDestination(addr);
session.SetDefaultPayloadType(96);
session.SetDefaultMark(false);
session.SetDefaultTimestampIncrement(160);
//接收端代码：初始化
localPort =port;
sessionparams.SetOwnTimestampUnit(1.0/8000.0);
sessionparams.SetAcceptOwnPackets(true);
sessionparams.SetUsePollThread(true);

transparams.SetPortbase(localPort);

int status = session.Create(sessionparams,&transparams);
if (status <0)
{
return false;
}
session.SetDefaultPayloadType(96);
session.SetDefaultMark(false);
session.SetDefaultTimestampIncrement(160);
//接收线程
DWORD WINAPI threadproc(void* params)
{

int status=0;
FCALLBACK fun=(FCALLBACK)params;
RTPTime delay(0.020);
RTPTime starttime = RTPTime::CurrentTime();
unsigned char *recvdata;
//用于统计每次接收到数据的大小
long recvsize = 0;
long packid=0;
byte buff[DATALENGTH];
long len=0;
while (true)
{
if (runs)
{

session.BeginDataAccess();
if( session.GotoFirstSourceWithData() )
{
do
{
RTPPacket *rtppack;
memset(buff,0,sizeof(buff));
while( ( rtppack = session.GetNextPacket() ) != NULL )
{
recvsize = rtppack->GetPayloadLength();

recvdata = rtppack->GetPayloadData();

for (int i=0;i<recvsize;i++)
{

buff[len++]=recvdata[i];
}
session.DeletePacket( rtppack );
}
fun(buff,len);
//std::cout << "size:"<<len <<"data:" << buff << std::endl;
len=0;
}while( session.GotoNextSourceWithData() );
}

session.EndDataAccess();
}
else
{
break;
}
}

return NULL;
}

[really3353]

	char*			pSendBuffer;
	PTR_SEED_HEAD	pSeedHead;
	int				iSendSize;
	
	iSendSize		= uiDataSize + sizeof(SEED_HEAD);
	pSendBuffer		= (char*)malloc( iSendSize );
	memset( pSendBuffer, 0, iSendSize );
	
	pSeedHead		= (PTR_SEED_HEAD)pSendBuffer;
	memcpy( pSeedHead, &m_CommID, sizeof(GUID) );
	pSeedHead->DataLength	= uiDataSize;
	pSeedHead->DataPostion	= m_Sequence++;
	pSeedHead->DataType		= DataType;

	memcpy( pSendBuffer+sizeof(SEED_HEAD), pDataBuffer, uiDataSize );

	// 发送数据
	m_TransSession.SendPacket( pSendBuffer, iSendSize );

	free( pSendBuffer )

[really3353]

接收数据

	WPARAM			wParam;
	LPARAM			lParam;
	RTPPacket*		pack;
	
	ResetEvent( m_hRecvDataEvent );

	BeginDataAccess();
	
	// check incoming packets
	if (GotoFirstSourceWithData())
	{
		do
		{			
			while ((pack = GetNextPacket()) != NULL)
			{
				uint8_t*		dataBuffer;
				size_t			dataLength;
				PTR_SEED_HEAD	pSeedHead;
				
				// 保存结束数据
				dataBuffer	= pack->GetPayloadData();
				dataLength	= pack->GetPayloadLength();
				
				pSeedHead	= (PTR_SEED_HEAD)dataBuffer;

				if ( pSeedHead->DataType == PACKET_VIDEO )
				{
					wParam		= memcmp( pSeedHead, &m_CommID, sizeof(GUID) );
					lParam		= (LPARAM)dataBuffer;
					SendMessage( m_wMessageWnd, WM_VIDEODATA, wParam, lParam );
				}
				DeletePacket(pack);
			}
		} while (GotoNextSourceWithData());
	}
	
	EndDataAccess();

[上海老李]

接收是不是不能开启一个线程？

[really3353]

你可以尝试一下jthread这个库，封装的比较好

[上海老李]

哥们，你能不能麻烦一下子，搞个视频传输的DEMO出来？我这几天折腾得头疼。收到数据，总是固定的480一个包。再说线程这块应不会要用具体哪种库吧，我通过线程是收到数据了。

[上海老李]

我以前没做过，打算先在WINDOWS下试成功后，往WINDOWS MOBILE和SYMBIAN下移植，自己玩的，你有什么建议吗？

[really3353]

void CRTPTransSession::RecvDataThread(void *pParam)
{
	CRTPTransSession*		pSession;
	MSG						msg;
	RTPTime					delay(0.10);
	
	pSession		= (CRTPTransSession*)pParam;

	while ( WaitForSingleObject( pSession->m_hStopRecvEvent, 10 ) == WAIT_TIMEOUT )
	{
		while ( WaitForSingleObject( pSession->m_hRecvDataEvent, 10 ) == WAIT_TIMEOUT )
		{
			while(PeekMessage(&msg,NULL,NULL,NULL,PM_REMOVE))
			{
				TranslateMessage(&msg);
				DispatchMessage(&msg);
			}
		}
		pSession->DealwithData();
	}

	SetEvent( pSession->m_hStoppedEvent );
}

[really3353]

pSession->DealwithData();

这句可以不要，这是我对数据的一个处理

[上海老李]

后边这些代码，是你自己的应用扩展，我这没法用的，呵呵

[上海老李]

还有别的方法或例子吗？

[xdystxxx]

分包的时候错了吧？
session.SendPacket((void*)buff,sizeof(buff),96,false,starttime.GetMicroSeconds());
如果分包的时候，剩余数据不足一包，发送sizeof(buff)字节数据不就错了吗？