mainform.cs

VaxSIPUserAgentSDK

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;



namespace Project
{    
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        public int SND_ASYNC = 0x0001;
        public int SND_NODEFAULT = 0x0002;
        public int SND_LOOP = 0x0008;
        public int SND_FILENAME = 0x00020000;
        
        [DllImport("winmm.dll")]
        private static extern bool PlaySound(string lpszName, int hModule, int dwFlags); 
               
        private void ErrorMessages()
        {

            int nVaxObjectError = VaxSIPUserAgentOCX.GetVaxObjectError();

            switch (nVaxObjectError)
            {
                case 10:
                    MessageBox.Show("You are not Online, please click the 'Online' button first.", "VaxVoIP SDK");
                    break;

                case 11:
                    MessageBox.Show("Cann't open local communication port. Another softphone (x-Ten, x-lite or skype etc) is already running. Please close it first.", "VaxVoIP SDK");
                    break;

                case 12:
                    MessageBox.Show("License Key is not valid.", "VaxVoIP SDK");
                    break;

                case 13:
                    MessageBox.Show("Fail to initialize VaxVoIP task window.", "VaxVoIP SDK");
                    break;

                case 14:
                    MessageBox.Show("Cann't access Input/Mic device or device is already in use.", "VaxVoIP SDK");
                    break;

                case 15:
                    MessageBox.Show("Cann't access Output/Speaker device or device is already in use.", "VaxVoIP SDK");
                    break;

                case 16:
                    MessageBox.Show("Input/Mic device is not open.", "VaxVoIP SDK");
                    break;

                case 17:
                    MessageBox.Show("Output/Speaker device is not open.", "VaxVoIP SDK");
                    break;

                case 18:
                    MessageBox.Show("Your sound device does not support mic volume.", "VaxVoIP SDK");
                    break;

                case 19:
                    MessageBox.Show("Your sound device does not support speaker volume.", "VaxVoIP SDK");
                    break;

                case 20:
                    MessageBox.Show("Recording media initialization fail.", "VaxVoIP SDK");
                    break;

                case 21:
                    MessageBox.Show("Cann't open the wave file.", "VaxVoIP SDK");
                    break;

                case 22:
                    MessageBox.Show("Provided SIP URI is not valid.", "VaxVoIP SDK");
                    break;

                case 23:
                    MessageBox.Show("Codec is not supported.", "VaxVoIP SDK");
                    break;

                case 24:
                    MessageBox.Show("Error to create SDP (Session Description Protocol) request.", "VaxVoIP SDK");
                    break;

                case 25:
                    MessageBox.Show("Error to create CONNECTION request. Please check the provided SIP URI is valid.", "VaxVoIP SDK");
                    break;

                case 26:
                    MessageBox.Show("Error to create REGISTER request. Please check the provided SIP URI is valid.", "VaxVoIP SDK");
                    break;

                case 27:
                    MessageBox.Show("Error to create UN-REGISTER request. Please check the provided SIP URI is valid.", "VaxVoIP SDK");
                    break;

                case 28:
                    MessageBox.Show("Error to create DISCONNECT request.", "VaxVoIP SDK");
                    break;

                case 29:
                    MessageBox.Show("Line No is not valid.", "VaxVoIP SDK");
                    break;

                case 30:
                    MessageBox.Show("Line is already busy.", "VaxVoIP SDK");
                    break;

                case 31:
                    MessageBox.Show("Line is not open.", "VaxVoIP SDK");
                    break;

                case 32:
                    MessageBox.Show("Invalid Call-Id.", "VaxVoIP SDK");
                    break;

                case 33:
                    MessageBox.Show("Provided value is not valid.", "VaxVoIP SDK");
                    break;

                case 34:
                    MessageBox.Show("Selected line is not in voice session.", "VaxVoIP SDK");
                    break;

                case 35:
                    MessageBox.Show("Fail to read wave file.", "VaxVoIP SDK");
                    break;

                case 36:
                    MessageBox.Show("Fail to write wave file.", "VaxVoIP SDK");
                    break;

                case 37:
                    MessageBox.Show("Unsupported wave file format.", "VaxVoIP SDK");
                    break;
            }

        }
        
                
        private Boolean InitVaxVoIPObject()
        {
            /********************************************************************
                    Listen Port: default SIP port 5060.
                      SIP Proxy: SIP Proxy IP or FQDN provided by your service provider.
                  OutboundProxy: SIP outbound/NAT proxy IP or FQDN provided by your
                    service provider to use SIP phone behind the NAT.
        
            *********************************************************************/
            
            /****** Constructing SIP From URI for IP Telephony *******/
            string sFromURI = EditLoginId.Text + " <sip:" + EditLoginId.Text + "@" + EditSIPProxy.Text + ">";

            if(EditDisplayName.Text != "")
                sFromURI = EditDisplayName.Text + " <sip:" + EditLoginId.Text + "@" + EditSIPProxy.Text + ">";

            String sMyIP = VaxSIPUserAgentOCX.GetMyIP();
            Boolean bResult = true;

            int nListenPort = 5060;

            for(nListenPort = 5060; nListenPort < 7000; nListenPort++)
            {
                if (!VaxSIPUserAgentOCX.Initialize(false, sMyIP, nListenPort, sFromURI, EditOutBoundProxy.Text, EditSIPProxy.Text, EditLoginId.Text, EditLoginPwd.Text, true, 7))
                {
                    if(11 != VaxSIPUserAgentOCX.GetVaxObjectError())
                    {
                        bResult = false;
                        
                        ErrorMessages();
                        break;
                    }
                }
                else
                {
                    break;
                }
            }

            if(nListenPort >= 7000)
            {
                MessageBox.Show("Cann't open SIP communication port.", "VaxVoIP SDK");
                bResult = false;
            }

            return bResult;
        }

        private Boolean OpenLines(int nTotalNoOfLine)
        {
            Boolean bResult = true;
            int nListenPort = 7000;
            int nErrorCount = 0;

            String sMyIP = VaxSIPUserAgentOCX.GetMyIP();

            for (int nLineNo = 0; nLineNo < nTotalNoOfLine; nLineNo++)
            {
                if (!VaxSIPUserAgentOCX.OpenLine(nLineNo, false, sMyIP, nListenPort))
                {
                    if (VaxSIPUserAgentOCX.GetVaxObjectError() != 11)
                    {
                        bResult = false;

                        ErrorMessages();
                        break;
                    }
                    else
                    {
                        nErrorCount += 1;
                        nLineNo = nLineNo - 1;
                    }

                }

                nListenPort += 2; //It is importent to increament RTP Listen port by 2

                if (nErrorCount >= (nTotalNoOfLine + 1000)) // If unable to open more than 1000 ports.
                {
                    MessageBox.Show("Unable to open RTP communication port.", "VaxVoIP SDK");
                    bResult = false;
                    break;
                }
            }

            return bResult;
        }

        private void BtnOnline_Click(object sender, EventArgs e)
        {
            if( BtnOnline.Text == "Offline")
            {
                VaxSIPUserAgentOCX.UnInitialize();

                BtnOnline.Text = "Online";
                
                TimerTick.Enabled = false;
                ProgressTimer.Enabled = false;

                ComboAudioOut.Items.Clear();
                ComboAudioIn.Items.Clear();
                
                SpkProgBar.Value = 0;
                MicProgBar.Value = 0;

                return;
            }
                        
            if( EditLoginId.Text == "")
            {
                MessageBox.Show("Please enter the SIP proxy Login Id.", "VaxVoIP SDK");
                return;
            }

            if( EditSIPProxy.Text == "" )
            {
                MessageBox.Show("Please enter the SIP proxy address or URI.", "VaxVoIP SDK");
                return;
            }

            VaxSIPUserAgentOCX.SetLicenceKey("TRIAL-LICENSE-KEY");
                                
            if(!InitVaxVoIPObject())
                return;
            
            if(!OpenLines(7))
                return;

            if (CheckRegisterToProxy.Checked)
            {
                if (!VaxSIPUserAgentOCX.RegisterToProxy(3600))
                {
                    ErrorMessages();
                    return;
                }

                AddToStatusLog("Registering to SIP Proxy.");
            }

            if (CheckEchoCancel.Checked)
                VaxSIPUserAgentOCX.EnableEchoNoiseCancellation();
            else
                VaxSIPUserAgentOCX.DisableEchoNoiseCancellation();
            
            VaxSIPUserAgentOCX.DeselectAllVoiceCodec();

            if (CheckGSM610.Checked)
                VaxSIPUserAgentOCX.SelectVoiceCodec(0);

            if (CheckiLBC.Checked)
                VaxSIPUserAgentOCX.SelectVoiceCodec(1);

            if (CheckG711A.Checked)
                VaxSIPUserAgentOCX.SelectVoiceCodec(2);

            if (CheckG711U.Checked)
                VaxSIPUserAgentOCX.SelectVoiceCodec(3);

            VaxSIPUserAgentOCX.EnableKeepAlive(10);
                        
            BtnOnline.Text = "Offline";

            UpdateSoundDevice();
            
            TimerTick.Enabled = true;
            ProgressTimer.Enabled = true;
        }

        private void UpdateSoundDevice()
        {
            ComboAudioIn.Items.Clear();
            ComboAudioIn.Items.Add("Default Device");

            for(int nDeviceId = 0; nDeviceId < VaxSIPUserAgentOCX.GetAudioInDevTotal(); nDeviceId++)
            {
                ComboAudioIn.Items.Add(VaxSIPUserAgentOCX.GetAudioInDevName(nDeviceId));
            }