static async Task Main() { Console.WriteLine("SIPSorcery Getting Started Video Call Demo"); Console.WriteLine("Press ctrl-c to exit."); Log = AddConsoleLogger(); ManualResetEvent exitMRE = new ManualResetEvent(false); _sipTransport = new SIPTransport(); EnableTraceLogs(_sipTransport); // Open a window to display the video feed from the remote SIP party. _form = new Form(); _form.AutoSize = true; _form.BackgroundImageLayout = ImageLayout.Center; _localVideoPicBox = new PictureBox { Size = new Size(VIDEO_FRAME_WIDTH, VIDEO_FRAME_HEIGHT), Location = new Point(0, 0), Visible = true }; _remoteVideoPicBox = new PictureBox { Size = new Size(VIDEO_FRAME_WIDTH, VIDEO_FRAME_HEIGHT), Location = new Point(0, VIDEO_FRAME_HEIGHT), Visible = true }; _form.Controls.Add(_localVideoPicBox); _form.Controls.Add(_remoteVideoPicBox); Application.EnableVisualStyles(); ThreadPool.QueueUserWorkItem(delegate { Application.Run(_form); }); ManualResetEvent formMre = new ManualResetEvent(false); _form.Activated += (object sender, EventArgs e) => formMre.Set(); Console.WriteLine("Waiting for form activation."); formMre.WaitOne(); _sipTransport.SIPTransportRequestReceived += OnSIPTransportRequestReceived; string executableDir = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location); var userAgent = new SIPUserAgent(_sipTransport, null, true); userAgent.OnCallHungup += (dialog) => exitMRE.Set(); var windowsAudioEndPoint = new WindowsAudioEndPoint(new AudioEncoder()); windowsAudioEndPoint.RestrictFormats(format => format.Codec == AudioCodecsEnum.PCMU); var windowsVideoEndPoint = new WindowsVideoEndPoint(new VpxVideoEncoder()); // Fallback to a test pattern source if accessing the Windows webcam fails. var testPattern = new VideoTestPatternSource(new VpxVideoEncoder()); MediaEndPoints mediaEndPoints = new MediaEndPoints { AudioSink = windowsAudioEndPoint, AudioSource = windowsAudioEndPoint, VideoSink = windowsVideoEndPoint, VideoSource = windowsVideoEndPoint, }; var voipMediaSession = new VoIPMediaSession(mediaEndPoints, testPattern); voipMediaSession.AcceptRtpFromAny = true; windowsVideoEndPoint.OnVideoSourceRawSample += (uint durationMilliseconds, int width, int height, byte[] sample, VideoPixelFormatsEnum pixelFormat) => { _form?.BeginInvoke(new Action(() => { unsafe { fixed(byte *s = sample) { System.Drawing.Bitmap bmpImage = new System.Drawing.Bitmap(width, height, width * 3, System.Drawing.Imaging.PixelFormat.Format24bppRgb, (IntPtr)s); _localVideoPicBox.Image = bmpImage; } } })); }; Console.WriteLine("Starting local video source..."); await windowsVideoEndPoint.StartVideo().ConfigureAwait(false); // Place the call and wait for the result. Task <bool> callTask = userAgent.Call(DESTINATION, null, null, voipMediaSession); callTask.Wait(CALL_TIMEOUT_SECONDS * 1000); if (callTask.Result) { Log.LogInformation("Call attempt successful."); windowsVideoEndPoint.OnVideoSinkDecodedSample += (byte[] bmp, uint width, uint height, int stride, VideoPixelFormatsEnum pixelFormat) => { _form?.BeginInvoke(new Action(() => { unsafe { fixed(byte *s = bmp) { System.Drawing.Bitmap bmpImage = new System.Drawing.Bitmap((int)width, (int)height, stride, System.Drawing.Imaging.PixelFormat.Format24bppRgb, (IntPtr)s); _remoteVideoPicBox.Image = bmpImage; } } })); }; windowsAudioEndPoint.PauseAudio().Wait(); voipMediaSession.AudioExtrasSource.SetSource(AudioSourcesEnum.Music); } else { Log.LogWarning("Call attempt failed."); Console.WriteLine("Press ctrl-c to exit."); } Console.CancelKeyPress += delegate(object sender, ConsoleCancelEventArgs e) { e.Cancel = true; Log.LogInformation("Exiting..."); exitMRE.Set(); }; exitMRE.WaitOne(); if (userAgent.IsCallActive) { Log.LogInformation("Hanging up."); userAgent.Hangup(); Task.Delay(1000).Wait(); } // Clean up. _form.BeginInvoke(new Action(() => _form.Close())); _sipTransport.Shutdown(); }
static void Main() { Console.WriteLine("SIPSorcery Call Hold and Blind Transfer example."); Console.WriteLine("Press 'c' to initiate a call to the default destination."); Console.WriteLine("Press 'h' to place an established call on and off hold."); Console.WriteLine("Press 'H' to hangup an established call."); Console.WriteLine("Press 't' to request a blind transfer on an established call."); Console.WriteLine("Press 'q' or ctrl-c to exit."); // Plumbing code to facilitate a graceful exit. CancellationTokenSource exitCts = new CancellationTokenSource(); // Cancellation token to stop the SIP transport and RTP stream. Log = AddConsoleLogger(); // Set up a default SIP transport. var sipTransport = new SIPTransport(); sipTransport.AddSIPChannel(new SIPUDPChannel(new IPEndPoint(IPAddress.Any, SIP_LISTEN_PORT))); Console.WriteLine($"Listening for incoming calls on: {sipTransport.GetSIPChannels().First().ListeningEndPoint}."); EnableTraceLogs(sipTransport); var winAudio = new WindowsAudioEndPoint(new AudioEncoder()); winAudio.RestrictFormats(formats => formats.Codec == AudioCodecsEnum.PCMU); // Create a client/server user agent to place a call to a remote SIP server along with event handlers for the different stages of the call. var userAgent = new SIPUserAgent(sipTransport, null, true); userAgent.RemotePutOnHold += () => Log.LogInformation("Remote call party has placed us on hold."); userAgent.RemoteTookOffHold += () => Log.LogInformation("Remote call party took us off hold."); userAgent.OnIncomingCall += async(ua, req) => { Log.LogInformation($"Incoming call from {req.Header.From.FriendlyDescription()} at {req.RemoteSIPEndPoint}."); var uas = userAgent.AcceptCall(req); if (userAgent?.IsCallActive == true) { // If we are already on a call return a busy response. Log.LogWarning($"Busy response returned for incoming call request."); uas.Reject(SIPResponseStatusCodesEnum.BusyHere, null); } else { var voipSession = new VoIPMediaSession(winAudio.ToMediaEndPoints()); voipSession.AcceptRtpFromAny = true; var answerResult = await userAgent.Answer(uas, voipSession); } }; // At this point the call has been initiated and everything will be handled in an event handler. Task.Run(async() => { try { while (!exitCts.Token.WaitHandle.WaitOne(0)) { var keyProps = Console.ReadKey(); if (keyProps.KeyChar == 'c') { if (!userAgent.IsCallActive) { var voipSession = new VoIPMediaSession(winAudio.ToMediaEndPoints()); voipSession.AcceptRtpFromAny = true; bool callResult = await userAgent.Call(DEFAULT_DESTINATION_SIP_URI, SIP_USERNAME, SIP_PASSWORD, voipSession); Log.LogInformation($"Call attempt {((callResult) ? "successfull" : "failed")}."); } else { Log.LogWarning("There is already an active call."); } } else if (keyProps.KeyChar == 'h') { // Place call on/off hold. if (userAgent.IsCallActive) { if (userAgent.IsOnLocalHold) { Log.LogInformation("Taking the remote call party off hold."); (userAgent.MediaSession as VoIPMediaSession).TakeOffHold(); userAgent.TakeOffHold(); } else { Log.LogInformation("Placing the remote call party on hold."); await(userAgent.MediaSession as VoIPMediaSession).PutOnHold(); userAgent.PutOnHold(); } } else { Log.LogWarning("There is no active call to put on hold."); } } else if (keyProps.KeyChar == 'H') { if (userAgent.IsCallActive) { Log.LogInformation("Hanging up call."); userAgent.Hangup(); } } else if (keyProps.KeyChar == 't') { // Initiate a blind transfer to the remote call party. if (userAgent.IsCallActive) { var transferURI = SIPURI.ParseSIPURI(TRANSFER_DESTINATION_SIP_URI); bool result = await userAgent.BlindTransfer(transferURI, TimeSpan.FromSeconds(TRANSFER_TIMEOUT_SECONDS), exitCts.Token); if (result) { // If the transfer was accepted the original call will already have been hungup. // Wait a second for the transfer NOTIFY request to arrive. await Task.Delay(1000); exitCts.Cancel(); } else { Log.LogWarning($"Transfer to {TRANSFER_DESTINATION_SIP_URI} failed."); } } else { Log.LogWarning("There is no active call to transfer."); } } else if (keyProps.KeyChar == 'q') { // Quit application. exitCts.Cancel(); } } } catch (Exception excp) { Log.LogError($"Exception Key Press listener. {excp.Message}."); } }); // Ctrl-c will gracefully exit the call at any point. Console.CancelKeyPress += delegate(object sender, ConsoleCancelEventArgs e) { e.Cancel = true; exitCts.Cancel(); }; // Wait for a signal saying the call failed, was cancelled with ctrl-c or completed. exitCts.Token.WaitHandle.WaitOne(); #region Cleanup. Log.LogInformation("Exiting..."); if (userAgent != null) { if (userAgent.IsCallActive) { Log.LogInformation($"Hanging up call to {userAgent?.CallDescriptor?.To}."); userAgent.Hangup(); } // Give the BYE or CANCEL request time to be transmitted. Log.LogInformation("Waiting 1s for call to clean up..."); Task.Delay(1000).Wait(); } if (sipTransport != null) { Log.LogInformation("Shutting down SIP transport..."); sipTransport.Shutdown(); } #endregion }
static async Task Main(string[] args) { Console.WriteLine("SIPSorcery Video Phone Command Line Demo"); Console.WriteLine("Press ctrl-c to exit."); Log = AddConsoleLogger(); ManualResetEvent exitMRE = new ManualResetEvent(false); ManualResetEvent waitForCallMre = new ManualResetEvent(false); var parseResult = Parser.Default.ParseArguments <Options>(args); _options = (parseResult as Parsed <Options>)?.Value; if (parseResult.Tag != ParserResultType.NotParsed) { if (_options.ListCameras) { #region List webcams. var webcams = await WindowsVideoEndPoint.GetVideoCatpureDevices(); if (webcams == null || webcams.Count == 0) { Console.WriteLine("No webcams were found."); } else { var index = 0; foreach (var webcam in webcams) { Console.WriteLine($"{index}: \"{webcam.Name}\", use --cam={index}."); index++; } } #endregion } else if (_options.ListFormats != null) { #region List webcam formats. var webcams = await WindowsVideoEndPoint.GetVideoCatpureDevices(); if (webcams == null || webcams.Count == 0) { Console.WriteLine("No webcams were found."); } else if (_options.ListFormats >= webcams.Count) { Console.WriteLine($"No webcam available for index {_options.ListFormats}."); } else { string webcamName = webcams[_options.ListFormats.Value].Name; var formats = await WindowsVideoEndPoint.GetDeviceFrameFormats(webcamName); Console.WriteLine($"Video frame formats for {webcamName}."); foreach (var vidFmt in formats) { float vidFps = vidFmt.MediaFrameFormat.FrameRate.Numerator / vidFmt.MediaFrameFormat.FrameRate.Denominator; string pixFmt = vidFmt.MediaFrameFormat.Subtype == WindowsVideoEndPoint.MF_I420_PIXEL_FORMAT ? "I420" : vidFmt.MediaFrameFormat.Subtype; Console.WriteLine($"{vidFmt.Width}x{vidFmt.Height} {vidFps:0.##}fps {pixFmt}"); } } #endregion } else { string webcamName = null; if (_options.WebcamIndex != null) { var webcams = await WindowsVideoEndPoint.GetVideoCatpureDevices(); if (webcams == null || webcams.Count == 0) { Console.WriteLine("No webcams were found."); Application.Exit(); } else if (webcams.Count < _options.WebcamIndex) { Console.WriteLine($"No webcam available for index {_options.WebcamIndex}."); Application.Exit(); } else { webcamName = webcams[_options.WebcamIndex.Value].Name; Console.WriteLine($"Using webcam {webcamName}."); } } _sipTransport = new SIPTransport(); if (string.IsNullOrEmpty(_options.CallDestination)) { // We haven't been asked to place a call so we're listening. IPAddress listenAddress = (System.Net.Sockets.Socket.OSSupportsIPv6) ? IPAddress.IPv6Any : IPAddress.Any; var listenEndPoint = new IPEndPoint(listenAddress, SIP_PORT_DEFAULT); try { SIPUDPChannel udpChannel = new SIPUDPChannel(listenEndPoint, true); _sipTransport.AddSIPChannel(udpChannel); } catch (ApplicationException appExcp) { Console.WriteLine($"Failed to create UDP SIP channel on {listenEndPoint}, error {appExcp.Message}."); SIPUDPChannel udpChannel = new SIPUDPChannel(new IPEndPoint(listenAddress, 0), true); _sipTransport.AddSIPChannel(udpChannel); } var listeningEP = _sipTransport.GetSIPChannels().First().ListeningSIPEndPoint; Console.WriteLine($"Listening for incoming call on {listeningEP}."); } EnableTraceLogs(_sipTransport); // Open a window to display the video feed from the remote SIP party. _form = new Form(); _form.Text = string.IsNullOrEmpty(_options.CallDestination) ? "Listener" : "Caller"; _form.AutoSize = true; _form.BackgroundImageLayout = ImageLayout.Center; _localVideoPicBox = new PictureBox { Size = new Size(VIDEO_FRAME_WIDTH, VIDEO_FRAME_HEIGHT), Location = new Point(0, 0), Visible = true }; _remoteVideoPicBox = new PictureBox { Size = new Size(VIDEO_FRAME_WIDTH, VIDEO_FRAME_HEIGHT), Location = new Point(0, VIDEO_FRAME_HEIGHT), Visible = true }; _form.Controls.Add(_localVideoPicBox); _form.Controls.Add(_remoteVideoPicBox); var userAgent = new SIPUserAgent(_sipTransport, null, true); userAgent.OnCallHungup += (dialog) => exitMRE.Set(); WindowsAudioEndPoint windowsAudioEndPoint = null; if (!_options.NoAudio) { windowsAudioEndPoint = new WindowsAudioEndPoint(new AudioEncoder()); windowsAudioEndPoint.RestrictFormats(x => x.Codec == AudioCodecsEnum.G722); } MediaEndPoints mediaEndPoints = null; if (_options.TestPattern && _options.WebcamIndex == null) { var testPattern = new VideoTestPatternSource(new FFmpegVideoEncoder()); var decoderSink = new DecoderVideoSink(new FFmpegVideoEncoder()); //var decoderSink = new DecoderVideoSink(new VpxVideoEncoder()); testPattern.RestrictFormats(format => format.Codec == VIDEO_CODEC); decoderSink.RestrictFormats(format => format.Codec == VIDEO_CODEC); mediaEndPoints = new MediaEndPoints { AudioSink = windowsAudioEndPoint, AudioSource = windowsAudioEndPoint, VideoSink = decoderSink, VideoSource = testPattern, }; } else { WindowsVideoEndPoint windowsVideoEndPoint = webcamName switch { null => new WindowsVideoEndPoint(new FFmpegVideoEncoder()), _ => new WindowsVideoEndPoint(new FFmpegVideoEncoder(), webcamName), }; windowsVideoEndPoint.RestrictFormats(format => format.Codec == VIDEO_CODEC); mediaEndPoints = new MediaEndPoints { AudioSink = windowsAudioEndPoint, AudioSource = windowsAudioEndPoint, VideoSink = windowsVideoEndPoint, VideoSource = windowsVideoEndPoint, }; } mediaEndPoints.VideoSource.OnVideoSourceRawSample += (uint durationMilliseconds, int width, int height, byte[] sample, VideoPixelFormatsEnum pixelFormat) => { if (_isFormActivated) { _form?.BeginInvoke(new Action(() => { if (_form.Handle != IntPtr.Zero) { int stride = width * 3; if (pixelFormat == VideoPixelFormatsEnum.I420) { sample = PixelConverter.I420toBGR(sample, width, height, out stride); } if (_localVideoPicBox.Width != width || _localVideoPicBox.Height != height) { Log.LogDebug($"Adjusting local video display from {_localVideoPicBox.Width}x{_localVideoPicBox.Height} to {width}x{height}."); _localVideoPicBox.Width = width; _localVideoPicBox.Height = height; } unsafe { fixed(byte *s = sample) { System.Drawing.Bitmap bmpImage = new System.Drawing.Bitmap(width, height, stride, System.Drawing.Imaging.PixelFormat.Format24bppRgb, (IntPtr)s); _localVideoPicBox.Image = bmpImage; } } } })); } }; Console.CancelKeyPress += delegate(object sender, ConsoleCancelEventArgs e) { e.Cancel = true; Log.LogInformation("Exiting..."); waitForCallMre.Set(); exitMRE.Set(); }; if (string.IsNullOrEmpty(_options.CallDestination)) { ActivateForm(); userAgent.OnIncomingCall += async(ua, req) => { var voipMediaSession = new VoIPMediaSession(mediaEndPoints); voipMediaSession.AcceptRtpFromAny = true; if (voipMediaSession.VideoLocalTrack != null) { voipMediaSession.VideoLocalTrack.MaximumBandwidth = MAXIMUM_VIDEO_BANDWIDTH; } var uas = userAgent.AcceptCall(req); await userAgent.Answer(uas, voipMediaSession); Console.WriteLine("Starting local video source..."); await mediaEndPoints.VideoSource.StartVideo().ConfigureAwait(false); waitForCallMre.Set(); }; Console.WriteLine("Waiting for incoming call..."); waitForCallMre.WaitOne(); } else { var voipMediaSession = new VoIPMediaSession(mediaEndPoints); voipMediaSession.AcceptRtpFromAny = true; if (voipMediaSession.VideoLocalTrack != null) { voipMediaSession.VideoLocalTrack.MaximumBandwidth = MAXIMUM_VIDEO_BANDWIDTH; } ActivateForm(); Console.WriteLine("Starting local video source..."); await mediaEndPoints.VideoSource.StartVideo().ConfigureAwait(false); // Place the call and wait for the result. Task <bool> callTask = userAgent.Call(_options.CallDestination, null, null, voipMediaSession); callTask.Wait(CALL_TIMEOUT_SECONDS * 1000); } if (userAgent.IsCallActive) { Log.LogInformation("Call attempt successful."); mediaEndPoints.VideoSink.OnVideoSinkDecodedSample += (byte[] bmp, uint width, uint height, int stride, VideoPixelFormatsEnum pixelFormat) => { if (_isFormActivated) { _form?.BeginInvoke(new Action(() => { if (_form.Handle != IntPtr.Zero) { unsafe { if (_remoteVideoPicBox.Width != (int)width || _remoteVideoPicBox.Height != (int)height) { Log.LogDebug($"Adjusting remote video display from {_remoteVideoPicBox.Width}x{_remoteVideoPicBox.Height} to {width}x{height}."); _remoteVideoPicBox.Width = (int)width; _remoteVideoPicBox.Height = (int)height; } fixed(byte *s = bmp) { System.Drawing.Bitmap bmpImage = new System.Drawing.Bitmap((int)width, (int)height, stride, System.Drawing.Imaging.PixelFormat.Format24bppRgb, (IntPtr)s); _remoteVideoPicBox.Image = bmpImage; } } } })); } }; } else { Log.LogWarning("Call attempt failed."); Console.WriteLine("Press ctrl-c to exit."); } exitMRE.WaitOne(); if (userAgent.IsCallActive) { Log.LogInformation("Hanging up."); userAgent.Hangup(); } Task.Delay(1000).Wait(); // Clean up. if (_form.Handle != IntPtr.Zero) { _form.BeginInvoke(new Action(() => _form.Close())); } _sipTransport.Shutdown(); } } }
static void Main(string[] args) { Console.WriteLine("SIPSorcery client user agent example."); Console.WriteLine("Press ctrl-c to exit."); // Plumbing code to facilitate a graceful exit. ManualResetEvent exitMre = new ManualResetEvent(false); bool preferIPv6 = false; bool isCallHungup = false; bool hasCallFailed = false; Log = AddConsoleLogger(LogEventLevel.Verbose); SIPURI callUri = SIPURI.ParseSIPURI(DEFAULT_DESTINATION_SIP_URI); if (args?.Length > 0) { if (!SIPURI.TryParse(args[0], out callUri)) { Log.LogWarning($"Command line argument could not be parsed as a SIP URI {args[0]}"); } } if (args?.Length > 1 && args[1] == "ipv6") { preferIPv6 = true; } if (preferIPv6) { Log.LogInformation($"Call destination {callUri}, preferencing IPv6."); } else { Log.LogInformation($"Call destination {callUri}."); } // Set up a default SIP transport. var sipTransport = new SIPTransport(); sipTransport.PreferIPv6NameResolution = preferIPv6; sipTransport.EnableTraceLogs(); var audioSession = new WindowsAudioEndPoint(new AudioEncoder()); audioSession.RestrictFormats(x => x.Codec == AudioCodecsEnum.PCMA || x.Codec == AudioCodecsEnum.PCMU); //audioSession.RestrictFormats(x => x.Codec == AudioCodecsEnum.G722); var rtpSession = new VoIPMediaSession(audioSession.ToMediaEndPoints()); var offerSDP = rtpSession.CreateOffer(preferIPv6 ? IPAddress.IPv6Any : IPAddress.Any); // Create a client user agent to place a call to a remote SIP server along with event handlers for the different stages of the call. var uac = new SIPClientUserAgent(sipTransport); uac.CallTrying += (uac, resp) => Log.LogInformation($"{uac.CallDescriptor.To} Trying: {resp.StatusCode} {resp.ReasonPhrase}."); uac.CallRinging += async(uac, resp) => { Log.LogInformation($"{uac.CallDescriptor.To} Ringing: {resp.StatusCode} {resp.ReasonPhrase}."); if (resp.Status == SIPResponseStatusCodesEnum.SessionProgress) { if (resp.Body != null) { var result = rtpSession.SetRemoteDescription(SdpType.answer, SDP.ParseSDPDescription(resp.Body)); if (result == SetDescriptionResultEnum.OK) { await rtpSession.Start(); Log.LogInformation($"Remote SDP set from in progress response. RTP session started."); } } } }; uac.CallFailed += (uac, err, resp) => { Log.LogWarning($"Call attempt to {uac.CallDescriptor.To} Failed: {err}"); hasCallFailed = true; }; uac.CallAnswered += async(iuac, resp) => { if (resp.Status == SIPResponseStatusCodesEnum.Ok) { Log.LogInformation($"{uac.CallDescriptor.To} Answered: {resp.StatusCode} {resp.ReasonPhrase}."); if (resp.Body != null) { var result = rtpSession.SetRemoteDescription(SdpType.answer, SDP.ParseSDPDescription(resp.Body)); if (result == SetDescriptionResultEnum.OK) { await rtpSession.Start(); } else { Log.LogWarning($"Failed to set remote description {result}."); uac.Hangup(); } } else if (!rtpSession.IsStarted) { Log.LogWarning($"Failed to set get remote description in session progress or final response."); uac.Hangup(); } } else { Log.LogWarning($"{uac.CallDescriptor.To} Answered: {resp.StatusCode} {resp.ReasonPhrase}."); } }; // The only incoming request that needs to be explicitly handled for this example is if the remote end hangs up the call. sipTransport.SIPTransportRequestReceived += async(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPRequest sipRequest) => { if (sipRequest.Method == SIPMethodsEnum.BYE) { SIPResponse okResponse = SIPResponse.GetResponse(sipRequest, SIPResponseStatusCodesEnum.Ok, null); await sipTransport.SendResponseAsync(okResponse); if (uac.IsUACAnswered) { Log.LogInformation("Call was hungup by remote server."); isCallHungup = true; exitMre.Set(); } } }; // Start the thread that places the call. SIPCallDescriptor callDescriptor = new SIPCallDescriptor( SIPConstants.SIP_DEFAULT_USERNAME, null, callUri.ToString(), SIPConstants.SIP_DEFAULT_FROMURI, callUri.CanonicalAddress, null, null, null, SIPCallDirection.Out, SDP.SDP_MIME_CONTENTTYPE, offerSDP.ToString(), null); uac.Call(callDescriptor, null); // Ctrl-c will gracefully exit the call at any point. Console.CancelKeyPress += delegate(object sender, ConsoleCancelEventArgs e) { e.Cancel = true; exitMre.Set(); }; // Wait for a signal saying the call failed, was cancelled with ctrl-c or completed. exitMre.WaitOne(); Log.LogInformation("Exiting..."); rtpSession.Close(null); if (!isCallHungup && uac != null) { if (uac.IsUACAnswered) { Log.LogInformation($"Hanging up call to {uac.CallDescriptor.To}."); uac.Hangup(); } else if (!hasCallFailed) { Log.LogInformation($"Cancelling call to {uac.CallDescriptor.To}."); uac.Cancel(); } // Give the BYE or CANCEL request time to be transmitted. Log.LogInformation("Waiting 1s for call to clean up..."); Task.Delay(1000).Wait(); } if (sipTransport != null) { Log.LogInformation("Shutting down SIP transport..."); sipTransport.Shutdown(); } }