292 lines
7.6 KiB
C
292 lines
7.6 KiB
C
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// RTPSession.h : Declaration of the CRTPSession
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#ifndef __RTPSESSION_H_
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#define __RTPSESSION_H_
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#include "resource.h" // main symbols
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#include "queue.h"
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#ifndef MAX_MISORDER
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const int MAX_MISORDER =20;
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#endif
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const int MAX_DROPPED =30;
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typedef short PORT;
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typedef unsigned __int64 NTP_TS;
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//typedef void (* PRTPRECVCALLBACK)(DWORD dwStatus, DWORD_PTR dwCallback, NETBUF *pNetBuf, DWORD ssrc, DWORD ts, UINT seq, BOOL fMark);
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typedef struct {
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UINT sessionId;
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UINT mediaId;
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BOOL fSend;
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PSOCKADDR_IN pLocalAddr;
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PSOCKADDR_IN pLocalRTCPAddr;
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PSOCKADDR_IN pRemoteAddr;
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PSOCKADDR_IN pRemoteRTCPAddr;
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} RTPCHANNELDESC;
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typedef struct {
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RTP_HDR_T hdr; // header template for quick formatting
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RTP_STATS sendStats; // statistics
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} RTP_SEND_STATE;
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typedef struct {
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RTP_STATS rcvStats; // statistics
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NTP_TS ntpTime;
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DWORD rtpTime;
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} RTP_RECV_STATE;
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// generic UDP socket wrapper
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// defined in its entirety here
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class UDPSOCKET {
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SOCKET Sock;
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SOCKADDR_IN local_sin;
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SOCKADDR_IN remote_sin;
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int local_sin_len;
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int remote_sin_len;
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public:
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UDPSOCKET() {
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ZeroMemory(&local_sin,sizeof(local_sin));
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ZeroMemory(&remote_sin,sizeof(remote_sin));
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Sock = INVALID_SOCKET;}
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~UDPSOCKET()
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{
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Cleanup();
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}
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VOID SetRemoteAddr(PSOCKADDR_IN psin) {remote_sin = *psin;};
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VOID SetLocalAddress(PSOCKADDR_IN psin) {local_sin = *psin;};
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PSOCKADDR_IN GetLocalAddress() {return &local_sin;};
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PSOCKADDR_IN GetRemoteAddress() {return &remote_sin;};
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VOID SetRemotePort(PORT port) {remote_sin.sin_port = htons(port);};
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VOID SetLocalPort(PORT port) {local_sin.sin_port = htons(port);};
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PORT GetRemotePort() {return (ntohs(remote_sin.sin_port));};
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PORT GetLocalPort() {return(ntohs(local_sin.sin_port));};
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SOCKET GetSock() {return Sock;};
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BOOL NewSock()
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{
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if(Sock == INVALID_SOCKET)
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{
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Sock = (*RRCMws.WSASocket) (AF_INET,
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SOCK_DGRAM,
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WS2Enabled ? FROM_PROTOCOL_INFO : 0,
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&RRCMws.RTPProtInfo,
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0,
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WSA_FLAG_OVERLAPPED);
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}
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return(Sock != INVALID_SOCKET);
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}
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VOID Cleanup()
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{
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if(Sock != INVALID_SOCKET)
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{
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(*RRCMws.closesocket)(Sock);
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Sock = INVALID_SOCKET;
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}
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}
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int BindMe()
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{
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return (*RRCMws.bind)(Sock, (LPSOCKADDR)&local_sin, sizeof (local_sin));
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}
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};
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/////////////////////////////////////////////////////////////////////////////
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// CRTPPacket (internal object representing a received RTPPacket)
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class CRTPPacket1
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{
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public:
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CRTPPacket1()
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{
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m_wsabuf.buf = NULL;
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m_wsabuf.len = 0;
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m_cbSize = 0;
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}
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~CRTPPacket1();
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public:
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HRESULT Init(UINT cbMaxSize); // allocates buffer of size cbMaxSize
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WSAOVERLAPPED *GetOverlapped() {return &m_overlapped;}
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void SetActual(UINT len) {m_wsabuf.len = len;}
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void RestoreSize() {m_wsabuf.len = m_cbSize;}
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static CRTPPacket1 *GetRTPPacketFromOverlapped(WSAOVERLAPPED *pOverlapped)
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{
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return ( (CRTPPacket1 *)((char *)pOverlapped - (UINT_PTR)(&((CRTPPacket1 *)0)->m_overlapped)));
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}
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static CRTPPacket1 *GetRTPPacketFromWSABUF(WSABUF *pBuf)
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{
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return ( (CRTPPacket1 *)((char *)pBuf - (UINT_PTR)(&((CRTPPacket1 *)0)->m_wsabuf)));
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}
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WSABUF *GetWSABUF() {return &m_wsabuf;}
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DWORD GetTimestamp() {return (((RTP_HDR_T *)m_wsabuf.buf)->ts);}
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void SetTimestamp(DWORD timestamp) {((RTP_HDR_T *)m_wsabuf.buf)->ts = timestamp;}
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UINT GetSeq() {return (((RTP_HDR_T *)m_wsabuf.buf)->seq);}
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void SetSeq(UINT seq) {((RTP_HDR_T *)m_wsabuf.buf)->seq = (WORD)seq;}
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BOOL GetMarkBit() {return (((RTP_HDR_T *)m_wsabuf.buf)->m);}
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private:
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WSAOVERLAPPED m_overlapped;
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WSABUF m_wsabuf;
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UINT m_cbSize; // (max) size of packet
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};
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/////////////////////////////////////////////////////////////////////////////
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// CRTPSession
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class ATL_NO_VTABLE CRTPSession :
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public CComObjectRootEx<CComMultiThreadModel>,
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// public CComCoClass<CRTPSession, &CLSID_RTPSession>,
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public IRTPSend,
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public IRTPSession,
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public IRTPRecv
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{
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public:
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CRTPSession();
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HRESULT FinalRelease();
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//DECLARE_REGISTRY_RESOURCEID(IDR_RTPSESSION)
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BEGIN_COM_MAP(CRTPSession)
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COM_INTERFACE_ENTRY(IRTPSend)
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COM_INTERFACE_ENTRY(IRTPSession)
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COM_INTERFACE_ENTRY(IRTPRecv)
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END_COM_MAP()
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// IRTPSend
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public:
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STDMETHOD(Send)(
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WSABUF *pWsabufs,
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UINT nWsabufs,
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WSAOVERLAPPED *pOverlapped,
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LPWSAOVERLAPPED_COMPLETION_ROUTINE pWSAPC );
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STDMETHOD(GetSendStats)(RTP_STATS *pSendStats) {
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*pSendStats = m_ss.sendStats;return S_OK;
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}
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// IRTPRecv
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STDMETHOD(SetRecvNotification) (PRTPRECVCALLBACK , DWORD_PTR dwCallback, UINT nBufs);
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STDMETHOD(CancelRecvNotification) ();
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// called by CRTPMediaStream to free accumulated packets
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STDMETHOD (FreePacket)(WSABUF *pBuf) ;
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STDMETHOD(GetRecvStats)(RTP_STATS *pSendStats) {
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*pSendStats = m_rs.rcvStats;return S_OK;
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}
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// IRTPSession
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STDMETHOD(SetLocalAddress)(BYTE *sockaddr, UINT cbAddr);
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STDMETHOD(SetRemoteRTPAddress)(BYTE *sockaddr, UINT cbAddr);
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STDMETHOD(SetRemoteRTCPAddress)(BYTE *sockaddr, UINT cbAddr);
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STDMETHOD(GetLocalAddress)(const BYTE **sockaddr, UINT *pcbAddr);
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STDMETHOD(GetRemoteRTPAddress)(const BYTE **sockaddr, UINT *pcbAddr);
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STDMETHOD(GetRemoteRTCPAddress)(const BYTE **sockaddr, UINT *pcbAddr);
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STDMETHOD(CreateRecvRTPStream)(DWORD ssrc, IRTPRecv **ppIRTPRecv);
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STDMETHOD(SetSendFlowspec)(FLOWSPEC *pSendFlowspec);
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STDMETHOD(SetRecvFlowspec)(FLOWSPEC *pRecvFlowspec);
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STDMETHOD (SetMaxPacketSize) (UINT cbPacketSize);
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// other non-COM methods
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// called by CRTPMediaStream to request that receive buffers be posted
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HRESULT PostRecv();
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private:
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UDPSOCKET *m_rtpsock;
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UDPSOCKET *m_rtcpsock;
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UINT m_sessionId;
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UINT m_mediaId;
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class CRTPSession *m_pSessNext;
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static class CRTPSession *m_pSessFirst;
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HANDLE m_hRTPSession;
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QOS m_Qos;
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UINT m_clockRate;
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// receive stuff
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UINT m_uMaxPacketSize;
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QueueOf<CRTPPacket1 *> m_FreePkts;
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UINT m_nBufsPosted;
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// this should be per remote SSRC
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PRTPRECVCALLBACK m_pRTPCallback;
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DWORD_PTR m_dwCallback;
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RTP_RECV_STATE m_rs;
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// used by RTPRecvFrom()
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int m_rcvSockAddrLen;
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SOCKADDR m_rcvSockAddr;
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// send stuff
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DWORD m_numBytesSend;
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int m_lastSendError;
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WSAOVERLAPPED m_sOverlapped; // used only for synchronous Send()
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BOOL m_fSendingSync; // TRUE if m_sOverlapped is in use
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RTP_SEND_STATE m_ss;
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HRESULT Initialize(UINT sessionId, UINT mediaId,BYTE *sockaddr, UINT cbAddr);
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BOOL SelectPorts();
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HRESULT SetMulticastAddress(PSOCKADDR_IN );
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friend void RRCMNotification(int ,DWORD_PTR,DWORD_PTR,DWORD_PTR);
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friend void CALLBACK WS2SendCB (DWORD , DWORD, LPWSAOVERLAPPED, DWORD );
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friend void CALLBACK WS2RecvCB (DWORD , DWORD, LPWSAOVERLAPPED, DWORD );
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friend class CRTP;
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void RTCPNotify(int,DWORD_PTR dwSSRC,DWORD_PTR rtcpsock);
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BOOL GetRTCPReport();
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};
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typedef CComObject<CRTPSession> ObjRTPSession; // instantiable class
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/////////////////////////////////////////////////////////////////////////////
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// CRTP - top level RTP interface
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//
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class ATL_NO_VTABLE CRTP:
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public CComObjectRootEx<CComMultiThreadModel>,
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public CComCoClass<CRTP, &CLSID_RTP>,
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public IRTP
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{
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public:
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DECLARE_REGISTRY_RESOURCEID(IDR_RTP)
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BEGIN_COM_MAP(CRTP)
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COM_INTERFACE_ENTRY(IRTP)
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END_COM_MAP()
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// IRTP
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public:
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STDMETHOD(OpenSession)(
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UINT sessionId, // client specified unique identifier for the session
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DWORD flags, // SESSION_SEND, SESSION_RECV, SESSION_MULTICAST
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BYTE *localAddr, // Local socket interface addr to bind to
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UINT cbAddr, // sizeof(SOCKADDR)
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IRTPSession **ppIRTP); // [output] pointer to RTPSession
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// STDMETHOD(CreateSink)( IRTPSink **ppIRTPSink);
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private:
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static BOOL m_WSInitialized;
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};
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#endif //__RTPSINK_H_
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