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选择终端

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下面的代码示例演示如何选择与调用关联的流上的终端。

使用此代码示例之前，必须执行 初始化 TAPI 和 选择地址中的操作。

此外，此示例要求应用程序已具有指向传入或传出调用的 ITBasicCallControl 接口的指针。 有关如何获取此指针的代码示例，请参阅发出呼叫或接听呼叫。

注意

此示例没有适用于生产代码的错误检查和发布。

 

// pAddress is an ITAddress interface pointer.
// pBasicCall is an ITBasicCallControl interface pointer.

// Get the ITStreamControl interface.
ITStreamControl * pStreamControl;
HRESULT hr = pBasicCall->QueryInterface(
        IID_ITStreamControl,
        (void **) &pStreamControl
        );
// If ( hr != S_OK ) process the error here. 

// Enumerate the streams and select 
// terminals onto them.
IEnumStream * pEnumStreams;
ITStream    * pStream;
hr = pStreamControl->EnumerateStreams(&pEnumStreams);
// If ( hr != S_OK ) process the error here. 

while ( S_OK == pEnumStreams->Next(1, &pStream, NULL) )
{
    // Get the media type and direction of this stream.
    long                lMediaType;
    TERMINAL_DIRECTION  dir;
    hr = pStream->get_MediaType( &lMediaType );
    // If ( hr != S_OK ) process the error here. 
    hr = pStream->get_Direction( &dir );
    // If ( hr != S_OK ) process the error here. 

    // Create the default terminal for this media type and direction.
    //   If lMediaType == TAPIMEDIATYPE_VIDEO and
    //   dir == TD_RENDER, a dynamic video render terminal
    //   is required. Please see Incoming.cpp in 
    //   the samples section of the SDK. 
    // For all other terminals, get the default static terminal.
    ITTerminal * pTerminal;
    ITTerminalSupport * pTerminalSupport;
    hr = pAddress->QueryInterface( 
            IID_ITTerminalSupport, 
            (void **)&pTerminalSupport
         );
    // If ( hr != S_OK ) process the error here. 
    hr = pTerminalSupport->GetDefaultStaticTerminal(
            lMediaType,
            dir,
            pTerminal
         );
    // If ( hr != S_OK ) process the error here. 
    // Select the terminal on the stream.
    hr = pStream->SelectTerminal(pTerminal);
    // If ( hr != S_OK ) process the error here. 
}

ITAddress

ITBasicCallControl

ITStreamControl

ITStream

IEnumStream

ITTerminal

ITTerminalSupport