/// <summary>
/// Creates the RTP source.
/// </summary>
/// <param name="fileSink">The file sink.</param>
/// <param name="serverAddress">The server address.</param>
/// <param name="serverRtpPort">The server RTP port.</param>
/// <param name="serverRtcpPort">The server RTCP port.</param>
/// <param name="clientRtpPort">The client RTP port.</param>
/// <param name="clientRtcpPort">The client RTCP port.</param>
/// <returns>Succeeded or failed.</returns>
public bool CreateRtpSource(FileSink fileSink, string serverAddress,
int serverRtpPort, int serverRtcpPort,
int clientRtpPort, int clientRtcpPort)
{
// Creates rtp socket and rtcp socket:
ClientSocketBase clientRtpSocket = null;
ClientSocketBase clientRtcpSocket = null;
Socket socket = null;
socket = Utils.CreateUdpSocket(clientRtpPort);
if (socket == null)
{
return(false);
}
IPEndPoint iep = new IPEndPoint(IPAddress.Parse(serverAddress), serverRtpPort);
clientRtpSocket = new ClientSocketUdp(socket, (EndPoint)iep);
socket = Utils.CreateUdpSocket(clientRtcpPort);
if (socket != null)
{
iep = new IPEndPoint(IPAddress.Parse(serverAddress), serverRtcpPort);
clientRtcpSocket = new ClientSocketUdp(socket, (EndPoint)iep);
}
Source = new RtpSource(fileSink, clientRtpSocket);
if (Source == null)
{
return(false);
}
return(true);
}
/// <summary>
/// Creates the output file.
/// </summary>
/// <param name="filePath">The file path.</param>
/// <param name="fileSize">Size of the file.</param>
/// <returns>The FileSink object.</returns>
private FileSink CreateOutputFile(string filePath, long fileSize)
{
FileSink fileSink = null;
fileSink = new FileSink(filePath, fileSize);
fileSink.UpdateAccessRange += new EventHandler <TFilePermissionEventArgs>(this.OnUpdateAccessRange);
return(fileSink);
}
/// <summary>
/// Initializes a new instance of the <see cref="RtpSource"/> class.
/// </summary>
/// <param name="fileSink">The file sink.</param>
/// <param name="clientRtpSocket">The client RTP socket.</param>
public RtpSource(FileSink fileSink, ClientSocketBase clientRtpSocket)
{
this.fileSink = fileSink;
this.clientRtpSocket = clientRtpSocket;
this.clientRtpSocket.DatagramReceived += new EventHandler <TSocketEventArgs>(this.OnDatagramReceived);
rtpPacket = new RtpPacket();
preferredFrameSize = 1024;
internalPacketSize = preferredFrameSize + 16;
}
/// <summary>
/// Opens the stream.
/// </summary>
/// <param name="url">The URL.</param>
/// <param name="filePath">The file path.</param>
/// <returns>Succeeded or failed.</returns>
public bool OpenStream(string url, string filePath)
{
if (socket == null || !socket.Connected)
{
return(false);
}
// Sets the request url:
requestUrl = url;
// Sends "OPTIONS" command and then gets the response:
bool result = SendOptionsCmd();
if (!result)
{
CloseStream();
return(false);
}
// Sends "DESCRIBE" command and then gets the SDP description:
string sdpDescription = SendDescribeCmd();
if (string.IsNullOrEmpty(sdpDescription))
{
Utils.OutputMessage(false, MsgLevel.Error, "RtspClient -- OpenStream", "Sdp description is null or empty.");
CloseStream();
return(false);
}
// Creates a media session object from the SDP description which
// we have just received from the server:
mediaSession = new MediaSession(sdpDescription);
// Then, resolves the SDP description and initializes all basic
// information:
result = mediaSession.ResolveSdpDescription();
if (!result)
{
Utils.OutputMessage(false, MsgLevel.Error, "RtspClient -- OpenStream", "Resolve sdp description failed.");
CloseStream();
return(false);
}
long fileSize = mediaSession.FileSize;
Duration = mediaSession.PlayEndTime - mediaSession.PlayStartTime;
// And then, creates the output file to write the data:
FileSink fileSink = CreateOutputFile(filePath, fileSize);
if (fileSink == null)
{
Utils.OutputMessage(false, MsgLevel.Error, "RtspClient -- OpenStream", "Create output file failed.");
CloseStream();
return(false);
}
// After that, sends the "SETUP" command and setups the stream:
result = SendSetupCmd();
if (!result)
{
Utils.OutputMessage(false, MsgLevel.Error, "RtspClient -- OpenStream", "Send setup command failed.");
CloseStream();
return(false);
}
result = mediaSession.CreateRtpSource(fileSink, serverAddress,
serverRtpPort, serverRtcpPort, clientRtpPort, clientRtcpPort);
if (!result)
{
Utils.OutputMessage(false, MsgLevel.Error, "RtspClient -- OpenStream", "Create the rtp source failed.");
CloseStream();
return(false);
}
// Start the receiving work in asynchronous mode:
mediaSession.Source.StartPlaying();
// Finally, sends the "PLAY" command and starts playing stream:
result = PlayStream();
if (!result)
{
Utils.OutputMessage(false, MsgLevel.Error, "RtspClient -- OpenStream", "Play the stream failed.");
CloseStream();
return(false);
}
return(true);
}
