public static ParseRTSPMessage ( byte buffer, |
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buffer | byte | |
receivedFrom | ||
receivedOn | ||
리턴 |
public string GetStreamDescription(string url) { try { string hostname = Regex.Match(url, @"rtsp://(?<hostname>\S+?)/").Result("${hostname}"); //IPEndPoint rtspEndPoint = DNSResolver.R(hostname, DNS_RESOLUTION_TIMEOUT); logger.LogDebug("RTSP Client Connecting to " + hostname + "."); TcpClient rtspSocket = new TcpClient(hostname, RTSP_PORT); NetworkStream rtspStream = rtspSocket.GetStream(); string rtspSDP = null; RTSPRequest rtspRequest = new RTSPRequest(RTSPMethodsEnum.DESCRIBE, url); RTSPHeader rtspHeader = new RTSPHeader(1, null); rtspRequest.Header = rtspHeader; string rtspReqStr = rtspRequest.ToString(); RTSPMessage rtspMessage = null; RTSPResponse rtspResponse = null; byte[] rtspRequestBuffer = Encoding.UTF8.GetBytes(rtspReqStr); rtspStream.Write(rtspRequestBuffer, 0, rtspRequestBuffer.Length); byte[] buffer = new byte[2048]; int bytesRead = rtspStream.Read(buffer, 0, 2048); if (bytesRead > 0) { logger.LogDebug(Encoding.UTF8.GetString(buffer, 0, bytesRead)); byte[] msgBuffer = new byte[bytesRead]; Buffer.BlockCopy(buffer, 0, msgBuffer, 0, bytesRead); rtspMessage = RTSPMessage.ParseRTSPMessage(msgBuffer, null, null); if (rtspMessage.RTSPMessageType == RTSPMessageTypesEnum.Response) { rtspResponse = RTSPResponse.ParseRTSPResponse(rtspMessage); logger.LogDebug("RTSP Response received: " + rtspResponse.StatusCode + " " + rtspResponse.Status + " " + rtspResponse.ReasonPhrase + "."); } rtspSDP = rtspResponse.Body; } else { logger.LogWarning("Socket closed prematurely in GetStreamDescription for " + url + "."); } rtspSocket.Close(); return(rtspSDP); } catch (Exception excp) { logger.LogError("Exception GetStreamDescription. " + excp.Message); throw excp; } }
/// <summary> /// Sends a keep-alive packet to keep the RTSP RTP connection from being shut. /// </summary> private void SendKeepAlives() { try { Thread.CurrentThread.Name = "rtspclient-keepalive"; // Set the initial pause as half the keep-alive interval. Thread.Sleep(RTP_KEEP_ALIVE_INTERVAL * 500); while (!_isClosed) { _rtspSession.SendRTPRaw(new byte[] { 0x00, 0x00, 0x00, 0x00 }); // Also send an OPTIONS request on the RTSP connection to prevent the remote server from timing it out. RTSPRequest optionsRequest = new RTSPRequest(RTSPMethodsEnum.OPTIONS, _url); RTSPHeader optionsHeader = new RTSPHeader(_cseq++, _rtspSession.SessionID); optionsRequest.Header = optionsHeader; System.Diagnostics.Debug.WriteLine(optionsRequest.ToString()); var rtspRequestBuffer = Encoding.UTF8.GetBytes(optionsRequest.ToString()); _rtspStream.Write(rtspRequestBuffer, 0, rtspRequestBuffer.Length); var buffer = new byte[2048]; var bytesRead = _rtspStream.Read(buffer, 0, 2048); if (bytesRead > 0) { System.Diagnostics.Debug.WriteLine(Encoding.UTF8.GetString(buffer, 0, bytesRead)); var rtspMessage = RTSPMessage.ParseRTSPMessage(buffer, null, null); if (rtspMessage.RTSPMessageType == RTSPMessageTypesEnum.Response) { var optionsResponse = RTSPResponse.ParseRTSPResponse(rtspMessage); //logger.LogDebug("RTSP Response received for OPTIONS keep-alive request: " + optionsResponse.StatusCode + " " + optionsResponse.Status + " " + optionsResponse.ReasonPhrase + "."); } } else { logger.LogWarning("Zero bytes were read from the RTSP client socket in response to an OPTIONS keep-alive request."); } _sendKeepAlivesMRE.Reset(); _sendKeepAlivesMRE.WaitOne(RTP_KEEP_ALIVE_INTERVAL * 1000); } } catch (Exception excp) { logger.LogError("Exception RTSPClient.SendKeepAlives. " + excp); } }
/// <summary> /// Send a PLAY request to the RTSP server to commence the media stream. /// </summary> public void Play() { ThreadPool.QueueUserWorkItem(delegate { ProcessRTPPackets(); }); ThreadPool.QueueUserWorkItem(delegate { SendKeepAlives(); }); RTSPRequest playRequest = new RTSPRequest(RTSPMethodsEnum.PLAY, _url); RTSPHeader playHeader = new RTSPHeader(_cseq++, _rtspSession.SessionID); playRequest.Header = playHeader; System.Diagnostics.Debug.WriteLine(playRequest.ToString()); var rtspRequestBuffer = Encoding.UTF8.GetBytes(playRequest.ToString()); _rtspStream.Write(rtspRequestBuffer, 0, rtspRequestBuffer.Length); var buffer = new byte[2048]; var bytesRead = _rtspStream.Read(buffer, 0, 2048); if (bytesRead > 0) { System.Diagnostics.Debug.WriteLine(Encoding.UTF8.GetString(buffer, 0, bytesRead)); var rtspMessage = RTSPMessage.ParseRTSPMessage(buffer, null, null); if (rtspMessage.RTSPMessageType == RTSPMessageTypesEnum.Response) { var playResponse = RTSPResponse.ParseRTSPResponse(rtspMessage); logger.LogDebug("RTSP Response received to PLAY: " + playResponse.StatusCode + " " + playResponse.Status + " " + playResponse.ReasonPhrase + "."); } } else { throw new ApplicationException("Zero bytes were read from the RTSP client socket in response to a PLAY request."); } }
public void Start(string url) { _url = url; Match urlMatch = Regex.Match(url, @"rtsp://(?<hostname>\S+?)/", RegexOptions.IgnoreCase); if (!urlMatch.Success) { throw new ApplicationException("The URL provided to the RTSP client was not recognised, " + url + "."); } else { string hostname = urlMatch.Result("${hostname}"); int port = RTSP_PORT; if (hostname.Contains(':')) { port = SIPSorcery.Sys.IPSocket.ParsePortFromSocket(hostname); hostname = SIPSorcery.Sys.IPSocket.ParseHostFromSocket(hostname); } logger.LogDebug("RTSP client connecting to " + hostname + ", port " + port + "."); _rtspConnection = new TcpClient(hostname, port); _rtspStream = _rtspConnection.GetStream(); _rtspSession = new RTSPSession(); _rtspSession.RTPPayloadHeaderLength = _rtpPayloadHeaderLength; _rtspSession.ReservePorts(); _rtspSession.OnRTPQueueFull += RTPQueueFull; RTSPRequest rtspRequest = new RTSPRequest(RTSPMethodsEnum.SETUP, url); RTSPHeader rtspHeader = new RTSPHeader(_cseq++, null); rtspHeader.Transport = new RTSPTransportHeader() { ClientRTPPortRange = _rtspSession.RTPPort + "-" + _rtspSession.ControlPort }; rtspRequest.Header = rtspHeader; string rtspReqStr = rtspRequest.ToString(); RTSPMessage rtspMessage = null; System.Diagnostics.Debug.WriteLine(rtspReqStr); byte[] rtspRequestBuffer = Encoding.UTF8.GetBytes(rtspReqStr); _rtspStream.Write(rtspRequestBuffer, 0, rtspRequestBuffer.Length); byte[] buffer = new byte[2048]; int bytesRead = _rtspStream.Read(buffer, 0, 2048); if (bytesRead > 0) { System.Diagnostics.Debug.WriteLine(Encoding.UTF8.GetString(buffer, 0, bytesRead)); rtspMessage = RTSPMessage.ParseRTSPMessage(buffer, null, null); if (rtspMessage.RTSPMessageType == RTSPMessageTypesEnum.Response) { var setupResponse = RTSPResponse.ParseRTSPResponse(rtspMessage); if (setupResponse.Status == RTSPResponseStatusCodesEnum.OK) { _rtspSession.SessionID = setupResponse.Header.Session; _rtspSession.RemoteEndPoint = new IPEndPoint((_rtspConnection.Client.RemoteEndPoint as IPEndPoint).Address, setupResponse.Header.Transport.GetServerRTPPort()); _rtspSession.Start(); logger.LogDebug("RTSP Response received to SETUP: " + setupResponse.Status + ", session ID " + _rtspSession.SessionID + ", server RTP endpoint " + _rtspSession.RemoteEndPoint + "."); if (OnSetupSuccess != null) { OnSetupSuccess(this); } } else { logger.LogWarning("RTSP Response received to SETUP: " + setupResponse.Status + "."); throw new ApplicationException("An error response of " + setupResponse.Status + " was received for an RTSP setup request."); } } } else { throw new ApplicationException("Zero bytes were read from the RTSP client socket in response to a SETUP request."); } } }