private void TapiThreadProc()
{
while (!stop)
{
LINEMESSAGE msg;
if (NativeTapi.lineGetMessage(m_hLineApp, out msg, -1) == 0)
{
OnMessage(msg);
switch (msg.dwMessageID)
{
case LINEMESSAGES.LINE_CLOSE:
OnLineClose(msg);
break;
case LINEMESSAGES.LINE_CALLINFO:
OnLineCallInfo(msg);
break;
case LINEMESSAGES.LINE_CALLSTATE:
OnLineCallState(msg);
break;
case LINEMESSAGES.LINE_REPLY:
OnLineReply(msg);
break;
case LINEMESSAGES.LINE_APPNEWCALL:
OnNewCall(msg);
break;
}
}
}
}
/// <summary>
/// Cleanup
/// </summary>
public void Dispose()
{
NativeTapi.lineClose(hLine);
if (tapi.Lines.Contains(hLine))
{
tapi.Lines.Remove(hLine);
}
}
protected internal void LoadCallInfo()
{
m_info = new LINECALLINFO(1024);
m_info.Store();
int ret = NativeTapi.lineGetCallInfo(m_hCall, m_info.Data); m_info.Load();
if (ret < 0)
{
throw new TapiException(ret);
}
}
/// <summary>
/// Negotiates API version with TAPI for a given device
/// </summary>
/// <param name="deviceID">ID of the device. Must be less than <c>NumDevices</c></param>
/// <returns>Negotiated API version</returns>
public int NegotiateVersion(int deviceID)
{
int dwApiVersion;
LINEEXTENSIONID le;
int ret = NativeTapi.lineNegotiateAPIVersion(m_hLineApp, deviceID, dwAPIVersionLow, dwAPIVersionHigh, out dwApiVersion, out le);
if (ret != 0)
{
throw new TapiException(ret);
}
return(dwApiVersion);
}
protected internal void LoadCallState()
{
LINECALLSTATUS status = new LINECALLSTATUS(1024);
status.Store();
int ret = NativeTapi.lineGetCallStatus(m_hCall, status.Data);
status.Load();
if (ret < 0)
{
throw new TapiException(ret);
}
m_state = status.dwCallState;
}
/// <summary>
/// Opens TAPI line
/// </summary>
/// <param name="deviceID">ID of the device to open. Must be less than <c>NumDevices</c></param>
/// <param name="mode">combination of <c>LINEMEDIAMODE</c> flags</param>
/// <param name="priv">combination of <c>LINECALLPRIVILEGE</c> flags</param>
/// <returns>Newly created Line object</returns>
public Line CreateLine(int deviceID, LINEMEDIAMODE mode, LINECALLPRIVILEGE priv)
{
IntPtr hLine;
int ret = NativeTapi.lineOpen(m_hLineApp, deviceID, out hLine, NegotiateVersion(deviceID), 0, IntPtr.Zero, priv, mode, IntPtr.Zero);
if (ret != 0)
{
throw new TapiException(ret);
}
Line line = new Line(this, hLine);
Lines.Add(hLine, line);
return(line);
}
/// <summary>
/// Retrieves device caps
/// </summary>
/// <param name="deviceID">ID of the device. Must be less than <c>NumDevices</c></param>
/// <returns>Filled-in LINEDEVCAPS structure</returns>
public LINEERR GetDevCaps(int deviceID, out LINEDEVCAPS dc)
{
dc = new LINEDEVCAPS(1024);
dc.Store();
int ret = NativeTapi.lineGetDevCaps(m_hLineApp, deviceID, NegotiateVersion(deviceID), 0, dc.Data);
dc.Load();
if ((LINEERR)ret == LINEERR.STRUCTURETOOSMALL)
{
dc = new LINEDEVCAPS(dc.dwNeededSize);
ret = NativeTapi.lineGetDevCaps(m_hLineApp, deviceID, NegotiateVersion(deviceID), 0, dc.Data);
dc.Load();
}
return((LINEERR)ret);
}
/// <summary>
/// Asynchronous function to place a call
/// </summary>
/// <param name="Destination">String: phone number</param>
/// <param name="CountryCode">int: country code, e.g. 1 for US</param>
/// <param name="Params"><c>LINECALLPARAMS</c> structure data</param>
/// <param name="Callback">Asynchronous callback. Will be invoked when the call is complete</param>
/// <param name="State">User-defined state object. Can be null</param>
/// <returns>IAsyncResult</returns>
public IAsyncResult BeginMakeCall(string Destination, int CountryCode, /*LINECALLPARAMS*/ byte[] Params, AsyncCallback Callback, object State)
{
bSyncMakeCall = false;
MakeCallAsyncResult result = new MakeCallAsyncResult(0, Callback, State);
lock (tapi.PendingRequests.SyncRoot)
{
int ret = NativeTapi.lineMakeCall(m_hLine, out result.m_hCall, Destination, CountryCode, Params);
result.ReplyID = ret;
if (ret > 0)
{
tapi.PendingRequests.Add(ret, result);
}
}
return(result);
}
/// <summary>
/// Intialize TAPI data. Throws a TapiException if unsuccessful
/// </summary>
/// <returns>returns result of the call to lineInitializeEx</returns>
public int Initialize()
{
// We support API version up to 2.0
int dwApiVersion = 0x20000;
LINEINITIALIZEEXPARAMS initParams = new LINEINITIALIZEEXPARAMS(hEvent);
// Intialize TAPI app and throw an exception if failed
int ret = NativeTapi.lineInitializeEx(out m_hLineApp, IntPtr.Zero, IntPtr.Zero, "MyApp", out dwNumDev, ref dwApiVersion, initParams);
if (ret != 0)
{
throw new TapiException(ret);
}
// Start listen for events
thTapi = new Thread(new ThreadStart(TapiThreadProc));
thTapi.Start();
//TODO: build device list
return(ret);
}
/// <summary>
/// Stop all TAPI related activity. Perform cleanup
/// </summary>
public void Shutdown()
{
// Destroy active calls if any
object[] arr = new object[Calls.Values.Count];
Calls.Values.CopyTo(arr, 0);
foreach (Call call in arr)
{
call.Dispose();
}
// Close lines
arr = new object[Lines.Values.Count];
Lines.Values.CopyTo(arr, 0);
foreach (Line line in arr)
{
line.Dispose();
}
// Even though this flag is set to false, event thread will keep waiting indefinitely inside the call
// to lineGetMessage. Calling lineShutdown will result in LINE_CLOSE being sent and thread successfully
// terminated
stop = true;
NativeTapi.lineShutdown(m_hLineApp);
}
public void Hangup()
{
NativeTapi.lineDrop(m_hCall, null, 0);
}