/// <summary>
/// Processes the TAPI messages
/// </summary>
private void ProcessTapiMessages()
{
var arrWait = new WaitHandle[] { _evtStop, _evtReceivedLineEvent, _evtReceivedPhoneEvent };
var msg = new LINEMESSAGE();
ProcessTapiMessageDelegate ptmCb = ProcessTapiMessage;
int rc = 0;
bool stopEventRaised = false;
while (!stopEventRaised)
{
try
{
switch (WaitHandle.WaitAny(arrWait))
{
case 0:
stopEventRaised = true;
break;
case 1:
rc = NativeMethods.lineGetMessage(_hTapiLine, ref msg, 0);
break;
case 2:
rc = NativeMethods.phoneGetMessage(_hTapiPhone, ref msg, 0);
break;
}
}
// Someone called Shutdown with pending requests..
catch (ObjectDisposedException)
{
break;
}
if (rc == NativeMethods.LINEERR_OK)
{
// Call on another worker thread - just in case the UI
// made a blocking call and is waiting on the result from this
// thread.. if the WinForms/WPF app then attempts to marshal to
// the UI thread from this callback it will deadlock.
ptmCb.BeginInvoke(msg, ar =>
{
try
{
ptmCb.EndInvoke(ar);
}
catch (Exception ex)
{
Trace.WriteLine("TAPI message exception: " + ex.Message);
}
}, null);
}
}
}
private void ProcessTapiMessage(LINEMESSAGE msg)
{
switch (msg.dwMessageID)
{
case TapiEvent.LINE_CALLSTATE:
{
TapiCall call = TapiCall.FindCallByHandle(msg.hDevice);
if (call != null)
{
call.OnCallStateChange(msg.dwParam1.ToInt32(), msg.dwParam2, (MediaModes)msg.dwParam3.ToInt32());
}
else
{
// Call doesn't exist (yet), wait for a LINE_REPLY to add the call.
lock (_pendingCallStateMessages)
{
_pendingCallStateMessages.Add(Tuple.Create(DateTime.Now, msg));
}
}
}
break;
case TapiEvent.LINE_CALLINFO:
{
TapiCall call = TapiCall.FindCallByHandle(msg.hDevice);
if (call != null)
{
call.OnCallInfoChange(msg.dwParam1.ToInt32());
}
}
break;
case TapiEvent.LINE_GATHERDIGITS:
{
TapiCall call = TapiCall.FindCallByHandle(msg.hDevice);
if (call != null)
{
call.OnGatherDigitsComplete(msg.dwParam1.ToInt32());
}
}
break;
case TapiEvent.LINE_GENERATE:
{
TapiCall call = TapiCall.FindCallByHandle(msg.hDevice);
if (call != null)
{
call.OnGenerateDigitsOrToneComplete(msg.dwParam1.ToInt32());
}
}
break;
case TapiEvent.LINE_MONITORDIGITS:
{
TapiCall call = TapiCall.FindCallByHandle(msg.hDevice);
if (call != null)
{
call.OnDigitDetected(msg.dwParam1.ToInt32(), msg.dwParam2.ToInt32());
}
}
break;
case TapiEvent.LINE_MONITORMEDIA:
{
TapiCall call = TapiCall.FindCallByHandle(msg.hDevice);
if (call != null)
{
call.OnMediaModeDetected((MediaModes)msg.dwParam1.ToInt32());
}
}
break;
case TapiEvent.LINE_MONITORTONE:
{
TapiCall call = TapiCall.FindCallByHandle(msg.hDevice);
if (call != null)
{
call.OnToneDetected(msg.dwParam1.ToInt32());
}
}
break;
case TapiEvent.LINE_LINEDEVSTATE:
if (msg.dwParam1.ToInt32() == NativeMethods.LINEDEVSTATE_REINIT && msg.dwParam2.ToInt32() == 0)
{
if (ReinitRequired != null)
{
ReinitRequired(this, EventArgs.Empty);
}
}
goto case TapiEvent.LINE_CLOSE;
case TapiEvent.LINE_DEVSPECIFIC:
{
TapiCall call = TapiCall.FindCallByHandle(msg.hDevice);
if (call != null)
{
((TapiLine)call.Line).OnDeviceSpecific(call, msg.dwParam1, msg.dwParam2, msg.dwParam3);
}
else
{
goto case TapiEvent.LINE_CLOSE;
}
}
break;
case TapiEvent.LINE_DEVSPECIFICFEATURE:
{
TapiLine line = null;
lock (_lineArray)
{
foreach (TapiLine currLine in _lineArray)
{
if (currLine.Handle.DangerousGetHandle() == (IntPtr)msg.hDevice)
{
line = currLine;
break;
}
}
}
if (line != null)
{
line.OnDeviceSpecific(null, msg.dwParam1, msg.dwParam2, msg.dwParam3);
}
}
break;
case TapiEvent.LINE_AGENTSTATUS:
case TapiEvent.LINE_AGENTSTATUSEX:
case TapiEvent.LINE_AGENTSPECIFIC:
case TapiEvent.LINE_AGENTSESSIONSTATUS:
case TapiEvent.LINE_PROXYREQUEST:
case TapiEvent.LINE_PROXYSTATUS:
case TapiEvent.LINE_QUEUESTATUS:
case TapiEvent.LINE_REQUEST:
break;
case TapiEvent.PHONE_BUTTON:
case TapiEvent.PHONE_CLOSE:
case TapiEvent.PHONE_DEVSPECIFIC:
case TapiEvent.PHONE_REPLY:
HandleCompletion(msg.dwParam1.ToInt32(), msg.dwParam2);
break;
case TapiEvent.PHONE_STATE:
break;
case TapiEvent.PHONE_CREATE:
{
var newPhone = new TapiPhone(this, msg.dwParam1.ToInt32());
lock (_phoneArray)
{
_phoneArray.Add(newPhone);
}
if (PhoneAdded != null)
{
PhoneAdded(this, new PhoneAddedEventArgs(newPhone));
}
}
break;
case TapiEvent.PHONE_REMOVE:
{
TapiPhone phone = null;
lock (_phoneArray)
{
if (msg.dwParam1.ToInt32() < _phoneArray.Count)
{
phone = _phoneArray[msg.dwParam1.ToInt32()];
}
}
if (phone != null)
{
phone.IsValid = false;
if (PhoneRemoved != null)
{
PhoneRemoved(this, new PhoneRemovedEventArgs(phone));
}
}
}
break;
case TapiEvent.LINE_ADDRESSSTATE:
case TapiEvent.LINE_CLOSE:
case TapiEvent.LINE_APPNEWCALL:
if (msg.dwCallbackInstance != IntPtr.Zero)
{
try
{
var callback = (TapiEventCallback)Marshal.GetDelegateForFunctionPointer(msg.dwCallbackInstance, typeof(TapiEventCallback));
callback.Invoke(msg.dwMessageID, msg.dwParam1, msg.dwParam2, msg.dwParam3);
}
catch (Exception ex)
{
Trace.WriteLine(ex);
}
}
break;
case TapiEvent.LINE_CREATE:
{
var newLine = new TapiLine(this, msg.dwParam1.ToInt32());
// Add event handlers
newLine.NewCall += HandleNewCall;
newLine.CallStateChanged += HandleCallStateChanged;
newLine.CallInfoChanged += HandleCallInfoChanged;
newLine.AddressChanged += HandleAddressChanged;
newLine.Changed += HandleLineChanged;
newLine.Ringing += HandleLineRinging;
lock (_lineArray)
{
_lineArray.Add(newLine);
}
if (LineAdded != null)
{
LineAdded(this, new LineAddedEventArgs(newLine));
}
}
break;
case TapiEvent.LINE_REMOVE:
{
TapiLine line = null;
lock (_lineArray)
{
if (msg.dwParam1.ToInt32() < _lineArray.Count)
{
line = _lineArray[msg.dwParam1.ToInt32()];
}
}
if (line != null)
{
line.IsValid = false;
if (LineRemoved != null)
{
LineRemoved(this, new LineRemovedEventArgs(line));
}
}
}
break;
case TapiEvent.LINE_REPLY:
HandleCompletion(msg.dwParam1.ToInt32(), msg.dwParam2);
break;
default:
break;
}
}
