| Microsoft DirectX 8.1 (C++) |
Provides a template for creating class factories.
In Microsoft® DirectShow®, class factories are specialized using the CFactoryTemplate class, also called the factory template. Each class factory holds a pointer to a factory template. The factory template contains information about a COM object, including the object's class identifier (CLSID) and a pointer to a function that creates the object.
In your DLL, declare a global array of factory templates named g_Templates. Include one factory template for each object in the DLL. When the DllGetClassObject function makes a new class factory, it searches the array for a template with a matching CLSID. Assuming it finds one, it creates a class factory that holds a pointer to the matching template. When the client calls IClassFactory::CreateInstance, the class factory calls the instantiation function defined in the template.
For more information, see How to Create a DLL.
Requirements
Header: Declared in Combase.h; include Streams.h.
Library: Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).
| Public Member Variables | |
| m_Name | Name of the filter. |
| m_ClsID | Pointer to the CLSID of the object. |
| m_lpfnNew | Pointer to a function that creates an instance of the object. |
| m_lpfnInit | Pointer to a function that gets called from the DLL entry point. |
| m_pAMovieSetup_Filter | Pointer to an AMOVIESETUP_FILTER structure. |
| Public Methods | |
| IsClassID | Determines whether a CLSID matches this class template. |
| CreateInstance | Calls the object-creation function for the class. |