C

class factory: A COM object that implements the IClassFactory interface and that creates one or more instances of an object identified by a given class identifier(CLSID).
class factory template: A template that contains information about a class that is vital to its framework. The DirectShow COM framework developers to provide a class factory template for each C++ class implementing a COM object. Class factory templates are defined using two global variables (g_Templates and g_cTemplates). For more information, see COM Objects in DirectShow.
codec: Compressor/decompressor.