void RtspEvntArgs_Completed(object sender, SocketAsyncEventArgs e)
{
switch (e.LastOperation)
{
case SocketAsyncOperation.Connect:
SendMessage(RtspMessages.Describe());
CurrentState = State.Describe;
break;
case SocketAsyncOperation.Send:
ReceiveMessage();
break;
case SocketAsyncOperation.Receive:
string message = Encoding.UTF8.GetString(e.Buffer, 0, e.BytesTransferred);
Logging.Log(CurrentState.ToString());
Logging.Log(message);
Match m;
switch (CurrentState)
{
case State.Describe:
string ContentBasePattern = "Content-Base:(.*)" + Regex.Escape(Environment.NewLine);
string RangePattern = "a=range:(.*)" + Regex.Escape(Environment.NewLine);
m = Regex.Match(message, ContentBasePattern);
RtspMessages.ContentBase = m.Value.Substring(13, m.Length - 15);
m = Regex.Match(message, RangePattern);
RtspMessages.Range = m.Value.Substring(8, m.Length - 11);
RtspMessages.Stream = "trackID=1";
SendMessage(RtspMessages.Setup(RtpStream.ClientPort));
CurrentState = State.Setup;
break;
case State.Setup:
string SessionPattern = "Session:[^;]+;";
string SsrcPattern = "ssrc=(.*)" + Regex.Escape(Environment.NewLine);
string ServerPortPattern = "server_port=[^;]+;";
string ServerIpPattern = "source=[^;]+;";
m = Regex.Match(message, SessionPattern);
RtspMessages.Session = m.Value.Substring(9, 8);
m = Regex.Match(message, SsrcPattern);
RtspMessages.SSRC = m.Value.Substring(5, 8);
m = Regex.Match(message, ServerPortPattern);
RtspMessages.ServerPortRtsp = int.Parse(m.Value.Substring(12, 5));
RtspMessages.ServerPortRtcp = int.Parse(m.Value.Substring(18, 5));
RtpStream.ServerPort = RtspMessages.ServerPortRtsp;
m = Regex.Match(message, ServerIpPattern);
RtpStream.ServerIP = m.Value.Substring(7, m.Length - 8);
SendMessage(RtspMessages.Play());
CurrentState = State.Play;
break;
case State.Play:
RtpStream.StartStream();
string RtpSeqPattern = "seq=[^;]+;";
string RtpTimePattern = "rtptime=(.*)" + Regex.Escape(Environment.NewLine);
m = Regex.Match(message, RtpSeqPattern);
RtspMessages.RtpSeq = int.Parse(m.Value.Substring(4, m.Length - 5));
m = Regex.Match(message, RtpTimePattern);
RtspMessages.RtpTime = int.Parse(m.Value.Substring(8, m.Length - 10));
break;
case State.Teardown:
RtpStream.Abort();
break;
}
break;
}
}
