public string Play()
{
string res = string.Empty;
string options = SendCommand(BuildCommand("OPTIONS"));
if (options.Contains("DESCRIBE"))
{
string describe = SendCommand(BuildCommand("DESCRIBE"));
RtspResponse responseDescribe = RtspResponse.Parse(describe);
ParseDescribeResponse(describe);
string transport = GetTranspotParam();
string setup = SendCommand(BuildCommand("SETUP", _videoUri, transport));
RtspResponse response = RtspResponse.Parse(setup);
if (response.Status != 200)
{
throw new Exception("RTSP failure in SETUP with status code " + response.Status.ToString());
}
_session = response.Session;
if (response.TransportFields.ContainsKey("SERVER_PORT"))
{
string serverPortString = response.TransportFields["SERVER_PORT"].ToString();
string[] serverPorts = serverPortString.Split('-');
res = string.Format("rtp://{0}:{1}@192.168.10.79:{2}", _uriHost.Host, serverPorts[0], RtpReceivePort);
//res = string.Format("rtp://192.168.10.79:{2}", _uriHost.Host, serverPorts[0], RtpReceivePort);
}
int sessionTimeout = response.SessionTimeout;
if (sessionTimeout != -1)
{
_sessionWatchdog.Stop();
_sessionWatchdog.Interval = (sessionTimeout * 5000) / 6;
_sessionWatchdog.Start();
}
//InitRtp();
string playParam = string.Format("Session: {0}\r\nRange:npt=0.000-\r\n\r\n", _session);
string play = SendCommand(BuildCommand("PLAY", _uriHost.ToString(), playParam));
}
return(res);
}
public static RtspResponse Parse(string rawResponse)
{
RtspResponse response = new RtspResponse();
if (rawResponse.Length == 0)
{
return(response);
}
rawResponse = rawResponse.Replace("\r\n", "\n");
string firstLine = rawResponse.Substring(0, rawResponse.IndexOf("\n"));
string[] firstLineParts = firstLine.Split(' ');
response.Status = Convert.ToInt32(firstLineParts[1]);
rawResponse = rawResponse.Substring(firstLine.Length + 1);
int posEndOfHeader = rawResponse.IndexOf("\n\n");
if (posEndOfHeader == -1)
{
return(response); //not valid
}
string header = rawResponse.Substring(0, posEndOfHeader);
response.Content = rawResponse.Substring(posEndOfHeader + 2);
string[] responseLines = header.Split('\n');
foreach (string responseLine in responseLines)
{
if (responseLine.Length < 1)
{
continue;
}
string[] headerLineParts = responseLine.Split(':');
if (headerLineParts.Length < 2)
{
continue;
}
switch (headerLineParts[0].ToUpper())
{
case "CSEQ":
response.CSeq = Convert.ToInt32(headerLineParts[1]);
break;
case "AUTHORIZATION":
response.AuthorizationType = headerLineParts[1];
break;
case "TRANSPORT":
string[] transportFields = headerLineParts[1].Trim().Split(';');
if (transportFields.Length > 0)
{
response.TransportFields = new Hashtable();
}
foreach (string p in transportFields)
{
string[] transportFieldParts = p.Split('=');
if (transportFieldParts.Length > 1)
{
response.TransportFields[transportFieldParts[0].ToUpper()] = transportFieldParts[1];
}
else
{
response.TransportFields[transportFieldParts[0].ToUpper()] = null;
}
}
break;
case "SESSION":
string[] sessionLineParts = headerLineParts[1].Trim().Split(';');
response.Session = sessionLineParts[0].Trim();
if (sessionLineParts.Length > 1 && sessionLineParts[1].ToUpper().Contains("TIMEOUT"))
{
response.SessionTimeout = Convert.ToInt32(sessionLineParts[1].Substring(sessionLineParts[1].IndexOf('=') + 1));
}
break;
default:
string key = headerLineParts[0].ToUpper();
if (!response.HeaderFields.ContainsKey(key))
{
response.HeaderFields[key] = headerLineParts[1].Trim();
}
break;
}
}
if (response.HeaderFields.ContainsKey("CONTENT-TYPE") && response.HeaderFields["CONTENT-TYPE"].ToString() == "application/sdp")
{
response.SdpFields = new Sdp();
//parse sdp
string[] sdpFields = response.Content.Split('\n');
foreach (string field in sdpFields)
{
if (field.Length < 3)
{
continue;
}
char code = field.ToUpper()[0];
string value = field.Substring(2);
switch (code)
{
case 'O':
response.SdpFields.Origin = value;
break;
case 'V':
response.SdpFields.Version = Convert.ToInt32(value);
break;
case 'S':
response.SdpFields.Subject = value;
break;
case 'K':
{
string[] sa = value.Split(':');
if (sa.Length == 2)
{
switch (sa[0])
{
case "base64":
byte[] b = Convert.FromBase64String(sa[1]);
response.SdpFields.Key = System.Text.UTF8Encoding.UTF8.GetString(b);
break;
}
}
}
break;
case 'M':
string[] mediaDefParts = value.Split(' ');
if (mediaDefParts.Length == 4)
{
response._currentMediaDef = new MediaDef(mediaDefParts[0], Convert.ToInt32(mediaDefParts[1]), mediaDefParts[2], Convert.ToInt32(mediaDefParts[3]));
response.SdpFields.MediaDefs.Add(response._currentMediaDef);
}
break;
case 'A':
int pos = value.IndexOf(':');
if (pos > 0)
{
string[] attParts = new string[2];
attParts[0] = value.Substring(0, pos);
attParts[1] = value.Substring(pos + 1);
if (response._currentMediaDef != null)
{
response._currentMediaDef.Attributes[attParts[0].ToUpper()] = attParts[1];
}
else
{
response.SdpFields.Attributes[attParts[0].ToUpper()] = attParts[1];
}
}
break;
}
}
}
return(response);
}
