tapiline.cpp

一个TAPI源代码

// TapiLine.cpp : implementation file
//

#include "stdafx.h"
#include "snd.h"
#include "TapiLine.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

CTapiLine* CTapiLine::MyThis = NULL;
CTapiLine::CTapiLine()
{
	MyThis = this;
	m_LineHandle = NULL;
}

void CTapiLine::Create(HWND& hWnd)
{
	m_hWnd = hWnd;
	m_hInst =(HINSTANCE)::GetWindowLong(m_hWnd, GWL_HINSTANCE);
	SetProp( m_hWnd, "HCALL", NULL );
	SetProp( m_hWnd, "HLINE", NULL );
	SetProp( m_hWnd, "HCOMM", NULL );
}


CTapiLine::~CTapiLine()
{
	RemoveProp( m_hWnd, "HCALL" );
	RemoveProp( m_hWnd, "HLINE" );
	RemoveProp( m_hWnd, "HCOMM" );
}

// ***********************************************
// This routine places the actual call
//
LONG CTapiLine::DialCall( char * strPhNo )
{
int nRet;
int i;
LONG nRetCode =  0;			
DWORD dwApiVer;			
LINEEXTENSIONID	ExtensionID;	

//	nRet  = strlen(strPhNo);
//	if ( nRet <= 0 ) { AfxMessageBox("Phone # cannot NULL"); return -1; }
	if ( m_LineHandle != NULL ) { AfxMessageBox("Already connected"); return -2; }

	nRetCode = ::lineInitialize( &m_LineHandle, m_hInst,(LINECALLBACK)lineCallbackFunc,"MSM TAPI", &m_dwLines );
	if( nRetCode < 0 ) { TRACE("Tapi error..." );	return -3; }
	TRACE("Tapi initialized..." );
	for( i = 0; i < (int)m_dwLines; i++ )
	{
		nRetCode = ::lineNegotiateAPIVersion( m_LineHandle, i,EARLY_TAPI_VERSION, WIN95TAPIVERSION,&dwApiVer,&ExtensionID );
		if ( nRetCode != 0 ) { AfxMessageBox("Fatal Error in lineNegotiateAPIVersion"); return -4; } 
		nRetCode = ::lineOpen( m_LineHandle, i, &m_hLine,
				                dwApiVer, 0, (DWORD)m_hWnd,
                                LINECALLPRIVILEGE_NONE ,
					            LINEMEDIAMODE_DATAMODEM , 
								NULL );
		if( nRetCode == 0 )	{ TRACE("Line # %d Successfully Opend",i);	break;}
		else  { AfxMessageBox("Fatal Error in lineOpen"); return -5; }
	}
	memset( &m_LineParams, 0, sizeof( LINECALLPARAMS ) );
	m_LineParams.dwTotalSize = sizeof( LINECALLPARAMS );
	m_LineParams.dwMinRate = 0;
	m_LineParams.dwMaxRate = 56800;
    m_LineParams.dwBearerMode = LINEBEARERMODE_VOICE; 
	m_LineParams.dwMediaMode  = LINEMEDIAMODE_DATAMODEM |LINEMEDIAMODE_INTERACTIVEVOICE ;

	nRetCode = ::lineMakeCall( m_hLine, &m_hCall,strPhNo,92 ,	NULL );
	//nRetCode = lineDial(  m_hCall,strPhNo,92);
	if( nRetCode < 0 ) { AfxMessageBox("Fatal Error in lineMakeCall"); return -6; }
	else Delay(5000);	
	return( nRetCode );	
}

void CALLBACK CTapiLine::lineCallbackFunc(
    DWORD dwDevice, DWORD dwMessage, DWORD dwCallbackInstance, 
    DWORD dwParam1, DWORD dwParam2, DWORD dwParam3)
{
	MyThis->SetCallbackParams(
							dwDevice, dwMessage, 
							dwCallbackInstance, 
							dwParam1, dwParam2, 
							dwParam3);
}

void CTapiLine::SetCallbackParams(
							DWORD dwDevice, DWORD dwMessage, 
							DWORD dwCallbackInstance, 
							DWORD dwParam1, DWORD dwParam2, 
							DWORD dwParam3)
{
	m_dwDevice = dwDevice;
	m_dwMessage = dwMessage;
	m_dwCallbackInstance = dwCallbackInstance;
	m_dwParam1 = dwParam1;
	m_dwParam2 = dwParam2; 
	m_dwParam3 = dwParam3;
	TapiCallBack();		
}	
void CTapiLine::TapiCallBack()
{
    switch (m_dwMessage) 
        {
        case LINE_LINEDEVSTATE:	
            switch (m_dwParam1)
            {
            	case LINEDEVSTATE_REINIT:
					TRACE("LINEDEVSTATE_REINIT..." );
            		break;
            	case LINEDEVSTATE_RINGING:
					TRACE("LINEDEVSTATE_RINGING..." );
            		break;
				default:
					TRACE("\nUnknown device state ... \n");
            } 
			break; 

        case LINE_CALLSTATE:	// review the call state messages
            HandleCallState();
            break;
       
       case LINE_CLOSE: // the line has been closed!
			TRACE("LINE_CLOSED..." );
			break; 
       case LINE_REPLY:	// pass on TAPI_REPLY messages
			TRACE("Line Reply..." );
			::PostMessage( m_hWnd, WM_TAPI_LINE_REPLY,m_dwParam2,(LPARAM)(HCALL)m_dwDevice );            break;
	    case LINE_REQUEST:
        case LINE_ADDRESSSTATE:
            break;
        case LINE_CALLINFO:
            break;
        case LINE_DEVSPECIFIC:
            break;
        case LINE_DEVSPECIFICFEATURE:
            break;
        case LINE_GATHERDIGITS:
            break;
        case LINE_GENERATE:
            break;
        case LINE_MONITORDIGITS:
            break;
        case LINE_MONITORMEDIA:
            break;
        case LINE_MONITORTONE:
            break;
		default:
			TRACE("\nUnknown Message ... \n");
	}
} 

void CTapiLine::HandleCallState()
{
    if ((HCALL) m_dwDevice != m_hCall) {
		TRACE("LINE_CALLSTATE: Unknown device ID ...");
        return;
    }

	TRACE("\n Call Status = %d",m_dwParam1);
	switch( m_dwParam1 )
	{
		case LINECALLSTATE_RINGBACK:
		{
			TRACE("\n Ring back tone received...");
			break;
		}
        case LINECALLSTATE_IDLE:
			{
			TRACE("Line is idle...");
			::SendMessage(m_hWnd, WM_TAPI_IDLE, 0, 0); 
			HangupCall();
			break;
			}													     
		case LINECALLSTATE_ACCEPTED:	// just pass message on...
			{
			SetVarProps( (HWND)m_dwCallbackInstance, m_dwDevice );
			::PostMessage( m_hWnd, WM_TAPI_CALL_ACCEPTED, 
							0,  (LPARAM)(HCALL)m_dwDevice );
		 	break;
			}
		case LINECALLSTATE_PROCEEDING:	// post progress message
			{
			SetVarProps( (HWND)m_dwCallbackInstance, m_dwDevice );
			::PostMessage( m_hWnd, WM_TAPI_CALL_PROCEEDING, 
							0,  (LPARAM)(HCALL)m_dwDevice );
			break;
			}
		case LINECALLSTATE_CONNECTED:	// hey, we got through!
			{
				LineStateConnected();
				break;
			}
		case LINECALLSTATE_OFFERING:	// pass it on
			{
			TRACE("LINECALLSTATE_OFFERING...");
			break;
			}
		case LINECALLSTATE_DIALTONE:
			{
			TRACE("Dial Tone...");
            break;
			}
        case LINECALLSTATE_DIALING:		// pass it on
			{
			TRACE("Dialing...");
			::SendMessage(m_hWnd, WM_TAPI_DIALING, 0, 0); 
            break;
			}
        case LINECALLSTATE_BUSY:
			{
			TRACE("Line busy, shutting down...");
            HangupCall();
            break;
			}
        case LINECALLSTATE_SPECIALINFO:
			{
			TRACE("Special Info, probably couldn't dial number...");
            HangupCall();
            break;
			}
        case LINECALLSTATE_DISCONNECTED:
        {
            LPSTR pszReasonDisconnected;

            switch (m_dwParam2)
            {
                case LINEDISCONNECTMODE_NORMAL:
                    pszReasonDisconnected = "Remote Party Disconnected";
					::SendMessage(m_hWnd, WM_TAPI_DISCONNECT, 0, 0); 
                    break;
                case LINEDISCONNECTMODE_UNKNOWN:
                    pszReasonDisconnected = "Disconnected: Unknown reason";
                    break;

                case LINEDISCONNECTMODE_REJECT:
                    pszReasonDisconnected = "Remote Party rejected call";
                    break;

                case LINEDISCONNECTMODE_PICKUP:
                    pszReasonDisconnected = 
                        "Disconnected: Local phone picked up";
                    break;

                case LINEDISCONNECTMODE_FORWARDED:
                    pszReasonDisconnected = "Disconnected: Forwarded";
                    break;

                case LINEDISCONNECTMODE_BUSY:
                    pszReasonDisconnected = "Disconnected: Busy";
                    break;

                case LINEDISCONNECTMODE_NOANSWER:
                    pszReasonDisconnected = "Disconnected: No Answer";
                    break;

                case LINEDISCONNECTMODE_BADADDRESS:
                    pszReasonDisconnected = "Disconnected: Bad Address";
                    break;

                case LINEDISCONNECTMODE_UNREACHABLE:
                    pszReasonDisconnected = "Disconnected: Unreachable";
                    break;

                case LINEDISCONNECTMODE_CONGESTION:
                    pszReasonDisconnected = "Disconnected: Congestion";
                    break;

                case LINEDISCONNECTMODE_INCOMPATIBLE:
                    pszReasonDisconnected = "Disconnected: Incompatible";
                    break;

                case LINEDISCONNECTMODE_UNAVAIL:
                    pszReasonDisconnected = "Disconnected: Unavail";
                    break;

                case LINEDISCONNECTMODE_NODIALTONE:
                    pszReasonDisconnected = "Disconnected: No Dial Tone";
                    break;

                default:
                    pszReasonDisconnected = 
                        "Disconnected: LINECALLSTATE; Bad Reason";
                    break;

            }
			TRACE(pszReasonDisconnected);
            HangupCall();
            break;
        }
		default:
			TRACE("\nUnknown call state in param1\n");
	}		
}

LONG CTapiLine::LineStateConnected()
{
	TRACE("Hey I am connected!");
	
	LPVARSTRING lpVarStringStruct = NULL;
	size_t sizeofVarStringStruct = sizeof( VARSTRING ) + 1024;

	long lreturn;
	// get the comm handle.  Be sure to drop this handle when
	// the call is done or you'll get device unavailable errors
	// and have to REBOOT!
	lpVarStringStruct = ( LPVARSTRING )LocalAlloc( 0, sizeofVarStringStruct );
	do
	{
		memset( lpVarStringStruct, 0, sizeofVarStringStruct );
		lpVarStringStruct->dwTotalSize = (DWORD)sizeofVarStringStruct;
		lreturn = lineGetID( 0, 0, (HCALL)m_dwDevice, LINECALLSELECT_CALL, lpVarStringStruct, "comm/datamodem" );
	} while( lreturn != 0 );
	//
	// get comm device handle and save it to properties area
	m_hComm = *( (LPHANDLE )( ( LPBYTE )lpVarStringStruct + lpVarStringStruct->dwStringOffset ) );
	SetProp( (HWND)m_dwCallbackInstance, "HCOMM", m_hComm );
	SetVarProps( (HWND)m_dwCallbackInstance, m_dwDevice );
	//
	// tell main dialog we got through
	::SendMessage(m_hWnd, WM_TAPI_CONNECT, 
					  TAPI_LINECALLSTATE_CONNECTED, 
					  (LPARAM)(HANDLE)m_hComm );
	LocalFree( lpVarStringStruct ); // drop mem space

	return lreturn;
}

LONG CTapiLine::HangupCall()
{         
LONG nRetCode = 0;
LINECALLINFO LineCallInfo;

	if ( m_hComm == NULL ) { AfxMessageBox("Not Connected"); return -1; }
	CloseHandle( m_hComm );
	m_hComm = NULL;
	if ( m_hCall == NULL ) { AfxMessageBox("Not Connected"); return -1; }
	nRetCode = lineDrop( m_hCall, NULL, 0 );
	TRACE("Call Dropped...");
	memset( &LineCallInfo, 0, sizeof( LINECALLINFO ) );
	LineCallInfo.dwTotalSize = sizeof( LINECALLINFO );
	lineGetCallInfo( (HCALL)m_dwDevice, &LineCallInfo );
	nRetCode = lineDeallocateCall( (HCALL)m_dwDevice );
	if ( m_hLine == NULL ) { AfxMessageBox("Line Already Clear"); return -1; }
	nRetCode = lineClose( m_hLine );
	TRACE("Call stopped...");
	m_LineHandle = NULL;

    return nRetCode;
}
void CTapiLine::SetVarProps(HWND hWnd, DWORD hDevice )
{
LINECALLINFO LineCallInfo;

	memset( &LineCallInfo, 0, sizeof( LINECALLINFO ) );
	SetProp( hWnd, "HCALL", (HANDLE)(HCALL)hDevice );
	LineCallInfo.dwTotalSize = sizeof( LINECALLINFO );
	lineGetCallInfo( (HCALL)hDevice, &LineCallInfo );
 	SetProp(m_hWnd, "HLINE", (HANDLE)(HLINE)LineCallInfo.hLine );
	return;
}
void CTapiLine::Delay(UINT lFactor)
{
MSG msg;
DWORD dwTimeStarted;
dwTimeStarted = GetTickCount();

    while(GetTickCount() - dwTimeStarted < lFactor)
	{ 
		if (PeekMessage(&msg, 0, 0, 0, PM_REMOVE))
        {
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}
}