DirectShow Classes (Windows CE 5.0)

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This section contains reference entries for all the Microsoft® DirectShow® C++ classes, their data members, and their methods.

Programming element	Description
CAggDirectDraw	Aggregates an IDirectDraw interface.
CAggDrawSurface	Aggregates an IDirectDrawSurface interface.
CAMEvent	An event object that can be set and waited on to provide inter-thread synchronization.
CAMMsgEvent	A wrapper for event objects that do message processing.
CAMSchedule	Relieves clocks from the burden of managing the advise requests.
CAMThread	An abstract class, which is a worker thread class that provides creation, synchronization, and communication with a worker thread.
CAutoLock	Holds a critical section for the scope of a block or function.
CBaseAllocator	An abstract base class that implements the basic mechanisms for an allocator with a fixed number of fixed-size buffers.
CBaseBasicVideo	Handles the IDispatch component of the IBasicVideo interface and leaves the properties and methods as a pure virtual function.
CBaseControlVideo	Implements the IBasicVideo dual interface and controls the video properties of a generic video window.
CBaseDispatch	A base class that implements the IDispatch interface for use in a dual interface.
CBaseFilter	An abstract base class from which all filters are derived.
CBaseInputPin	An abstract base class derived from CBasePin that adds support for IMemInputPin in addition to the IPin interface support provided by CBasePin.
CBaseList	Represents a list of pointers to objects. No storage management or copying is done on the objects that are pointed to.
CBaseMediaFilter	An abstract base class that provides support for the IMediaFilter interface. The CBaseMediaFilter class handles State_Stopped, State_Paused, and State_Running state transitions.
CBaseObject	An abstract base class that is the basis for all component objects.
CBaseOutputPin	An abstract base class derived from the CBasePin class that provides support for the common memory transport.
CBasePin	An abstract base class from which all pins are derived.
CBasePropertyPage	An abstract class for implementing a property page.
CBaseReferenceClock	Implements the IReferenceClock interface.
CBaseRenderer	The base renderer class for writing renderers. This class handles a single input pin, all state changes, and synchronization.
CBaseStreamControl	Implements the IAMStreamControl interface on input and output pins in a filter graph. This class provides control of the starting and stopping of various components of the stream.
CBaseVideoRenderer	Used for building video renderer filters.
CBaseWindow	Creates a window and a worker thread. The worker thread pulls messages from the window's input queue and dispatches them as appropriate.
CBasicAudio	Handles the IDispatch interface component of the IBasicAudio interface and leaves the properties and methods of IBasicAudio as a pure virtual function to be implemented by a derived filter class.
CCritSec	Provides intra-process synchronization.
CDisp	Provides methods for displaying a number of data types for debugging.
CDispBasic	An internal class used to implement the CDisp class.
CEnumMediaTypes	Provides the mechanism for enumerating the pin's preferred media types.
CEnumPins	Supports the IEnumPins enumeration interface by calling CBaseFilter methods.
CFactoryTemplate	Provides a template used by the default class factory code.
CGenericList	A template class that allows for a type-specific implementation of a list.
CGuidNameList	This class implements an array of globally unique identifier (GUID) names based on the predefined names of GUIDs that come with DirectShow.
CLoadDirectDraw	Manages loading and unloading the Microsoft DirectDraw® library and creating the initial IDirectDraw interface.
CMediaControl	Provides base class handling of the IDispatch methods of the dual-interface IMediaControl.
CMediaEvent	The CMediaEvent class provides base class implementation of the IDispatch methods of the dual-interface IMediaEvent. It leaves the properties and methods of the IMediaEvent interface as a pure virtual function.
CMediaPosition	A base class that handles the IDispatch methods of the dual-interface IMediaPosition.
CMediaSample	Represents a buffer object that supports the IMediaSample interface.
CMediaType	Helps negotiate a media type between two connected filters.
CMemAllocator	Provides support for IMemAllocator by using the new operator to allocate memory.
CMsg	The CMsgThread class provides a worker thread to which any number of requests can be posted. The requests, in the form of a CMsg object, are queued and executed in order, asynchronously.
CMsgThread	A worker thread class that queues requests to the queuing thread for completion asynchronously.
COARefTime	Converts between the Automation-compatible REFTIME type and the REFERENCE_TIME type used within and between filters.
COutputQueue	Output pins use COutputQueue to send samples to another filter by using the local memory-based transport (that is, to input pins that support the IMemInputPin interface).
CPersistStream	The base class for persistent properties of filters (that is, filter properties in saved graphs).
CPosPassThru	A utility class that handles the IMediaPosition and IMediaSeeking interfaces for single-input pin renderers and transform filters.
CPullPin	The CPullPin class is provided to allow a filter downstream from the source to create a thread and pull a media stream from an asynchronous source filter that supports the IAsyncReader interface.
CQueue	Implements a simple queue abstract data type. The queue contains a finite number of objects, and a semaphore controls access to these objects.
CRefTime	Used to manage reference times.
CRendererInputPin	Channels calls to the rendering filter.
CRendererPosPassThru	This class, which is implemented on the video renderer, sets indexed frames to reference times. It assists the IMediaSeeking interface.
CSource	This class and its corresponding class, CSourceStream, simplify the construction of source filters that produce continuous streams of data comparable to the way the CTransformFilter class assists in the creation of transform filters.
CSourcePosition	An abstract class that assists source filters with the implementation of IMediaPosition methods.
CSourceSeeking	An abstract class that assists source filters with the implementation of IMediaSeeking interface methods. This class enables a source filter to handle calls that change the start and stop positions in the media stream and the playback rate.
CSourceStream	Derives from this class to provide a class that creates the data stream from one of the output pins.
CSystemClock	Implements a system clock that provides time information and timing signals to an application.
CTransformFilter	An abstract base class that supports a simple transform filter with a single input and a single output.
CTransformInputPin	Implements the input pin of a simple transform filter.
CTransformOutputPin	Implements the output pin of a simple transform filter.
CTransInPlaceFilter	An abstract base class that provides support for a simple transform filter with a single input and a single output.
CTransInPlaceInputPin	Implements the input pin to transform data in place rather than making a copy of it.
CTransInPlaceOutputPin	Implements the output pin of a simple transform-inplace filter, CTransInPlaceFilter.
CUnknown	All DirectShow Component Object Model (COM) objects derive from the CUnknown abstract base class. This class facilitates the creation of simple COM objects that you can combine with other COM objects to support multiple interfaces.
CVideoTransformFilter	Primarily a base class for AVI decompressor filters. It is based on a copying transform class and assumes that the output buffer will likely be a video buffer or DirectDraw buffer, although this could be used as a base class for other types of transform filters.
FOURCCMap	This class provides conversion between GUID media subtypes and old-style FOURCC 32-bit media tags.

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