IMMDevice::Activate and specifying IID_IBaseFilter as the interface identifier
阿新 • • 發佈:2017-10-31
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Use the IMMDevice pointer to the endpoint returned by the enumeration process to activate the desired audio streaming API and prepare for streaming. Different audio APIs require slightly different preparation. For DShow audio applications: Create a DirectShow COM object by calling IMMDevice::Activate and specifying IID_IBaseFilter asthe interface identifier. IUnknown *pDShowFilter = NULL; ... hr = pDevice->Activate ( IID_IBaseFilter, CLSCTX_INPROC_SERVER, NULL, reinterpret_cast<void **>(&pDShowFilter)); Build a DirectShow filter graph with this COM objectactivated by the device. For more information about this process, see "Building the Filter Graph" in DirectShow SDK documentation.
https://msdn.microsoft.com/zh-cn/library/windows/hardware/dd756608(v=vs.85).aspx
IMMDevice::Activate and specifying IID_IBaseFilter as the interface identifier