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DirectShow implements the CMediaType, CRefTime, and FOURCCMapmultimedia data type classes as shown in the following illustration.
CMediaTypeprovides a C++ class object containing the media type data structure and methods that provide access to each of the members of the structure.
CRefTimeprovides a C++ class object containing the methods used to access the reference time, and operators used to perform Boolean tests or arithmetical operations on two CRefTimeobjects.
FOURCCMapprovides conversion between the older-style FOURCCmedia tags used to identify and register media types and the GUID media subtypes used by DirectShow.
Last updated on Tuesday, May 18, 2004