1. 网络库模块,这个模块主要作用是网络消息通知,还有一个定时器事件,至于网络库怎么写,不会的可以去学习一下网络编程,然后提取出相似的接口。
接口定义如下:
1 class rtsp:public netoperation,netnocopyable 2 { 3 public: 4 rtsp(){} 5 rtsp(netaddress & server); 6 7 virtual int v_connect(netconnection * n); 8 virtual int v_close(netconnection * n); 9 virtual int v_read(netconnection * n); 10 virtual int v_accept(netconnection * n); 11 virtual int v_write(netconnection * n); 12 virtual int v_timer(evtime * e); 13 int v_rtspRead(netconnection * n); 14 int v_rtpRead(netconnection * n); 15 private: 16 netaddress m_serveAddr; 17 18 };
2.rtspconnection类,这里代表一条tcp连接,一个客户端和服务器的一条连接,定义如下:
class RtspClientConnection { public: RtspClientConnection(netconnection * n, netaddress & addr); virtual ~RtspClientConnection(); int handle_options(uint seq); int handle_describle( std::string & streamName, uint seq, std::string & fullRequestStr); const std::string & SessionId(){return m_sessionId;} int handle_setup( std::string & sessionId, std::string & streamName, std::string & trackId, uint seq, std::string & fullRequestStr); int handle_incmd( std::string & sessionId, std::string & cmd, std::string & streamName, std::string & trackId, uint seq, std::string & fullRequestStr); int handle_play(MediaSession * session, MediaSubSession * subSession, uint seq, std::string & fullRequestStr); int handle_pause(MediaSession * session, MediaSubSession * subSession, uint seq, std::string & fullRequestStr); int handle_teardown(MediaSession * session, MediaSubSession * subSession, uint seq, std::string & fullRequestStr); int handle_getparameter(MediaSession * session, MediaSubSession * subSession, uint seq, std::string & fullRequestStr); int handle_setparameter(MediaSession * session, MediaSubSession * subSession, uint seq, std::string & fullRequestStr); int handle_register(std::string & urlSuffix, std::string & fullRequestStr, bool registerRemote); void handleCmd_bad(){/*400 Bad Request*/} void handleCmd_notSupported(){/*405 Method Not Allowed*/} void handleCmd_notFound(){/*404 stream not find*/} void handleCmd_sessionNotFound(){/*454 Session Not Found*/} void handleCmd_unsupportedTransport(){/*461 Unsupported Transport*/} protected: netaddress m_serveAddr; MediaSession * m_mediaSession; netconnection * m_n; std::string m_sessionId; };
3. MediaSession类,这里和live555不同的是,这里每一个rtsp请求,都会生产一个MediaSession对象,相当于live555的MediaSession和streamctrl的结合,主要是对submediassion的管理
接口定义如下:
1 class MediaSession:public netnocopyable 2 { 3 public: 4 MediaSession(const std::string & streamName); 5 6 virtual ~MediaSession(); 7 8 void AddSubSession(MediaSubSession * pMediastream); 9 10 void DelSubSession(MediaSubSession * pMediastream); 11 12 MediaSubSession* Lookup(std::string & trackId); 13 14 int SubSessionCount(); 15 16 MediaSubSession * GetSubSession(int index); 17 18 const std::string & StreamName(); 19 20 std::string GenerateSDPDescription(netaddress & local); 21 22 protected: 23 std::string m_streamName; 24 uint m_createTime; 25 std::vector <MediaSubSession *> m_vecSubSession;
}
4.MediaSubSession类,代表的是一个stream,track,例如一般的MP4文件就有h264 + aac这2个track,接口定义如下
class MediaSubSession: public IRtspStream { public: MediaSubSession(); virtual ~MediaSubSession(); void SetTrackId(uint trackID); std::string GetTrackId(); void SetPayloadType(uint8 number); const static std::string & TrackFmt(); void SetStreamName(const std::string & streamName); virtual const std::string & SdpLines(); //set up virtual int GetStreamParam(uint clientRtpPort, uint clientRtcpPort, uint rtpChannelId, uint rtcpChannelId, uint dstIp, uint & dstTTL, bool & isMulticast, uint & serverRtpPort, uint & serverRtcpPort, uint serverIp); virtual int StartStream(); //play virtual int TransferStream(); virtual int OnTimer(); virtual int PauseStream(); virtual int SeekStream(); //tear down virtual int StopStream(); virtual uint RtpTimestamp(); virtual uint SeqNo(); protected: std::string m_sdpLines; uint m_trackId; std::string m_streamName; rtp * m_rtp; rtcp * m_rtcp; uint8 m_payLoadType; uint m_baseRtpTimestamp; uint m_timestamp; uint m_timerId; int64 m_nextTimestamp; netmutex m_mutex; };
5.线程池任务接口:
//用于线程池调用TransferStream接口,进行文件读取,rtp打包,发送 class IRtspStream:public netnocopyable { public: virtual int TransferStream() = 0; virtual int OnTimer() = 0; };
今天就更新到这里,下次接着更新