Multimedia Streaming Object and Interface Hierarchy

The following diagram shows the object hierarchy used in multimedia streaming.

The multimedia streaming architecture defines three general type of object:

• The AMMultimediaStream object exposes the IAMMultiMediaStream interface. Internally, this object wraps the DirectShow filter graph.
• Media stream objects expose the IMediaStream interface and are data specific. The AMMultimediaStream object contains one or more media streams.
• Stream sample objects contain the data for a particular stream.

The following media stream objects are supported:

• Audio stream. Exposes the IAudioMediaStream interface.
• DirectDraw stream. Represents a video stream that is rendered to a DirectDraw surface. Exposes the IDirectDrawMediaStream interface.
• Media type stream. Represents arbitrary data. Exposes the IAMMediaTypeStream interface.

Each media stream object creates its own kind of stream sample object:

• Audio streams create audio samples, which expose the IAudioStreamSample interface.
• DirectDraw streams create DirectDraw samples, which expose the IDirectDrawStreamSample interface.
• Media type streams create media type samples, which expose the IAMMediaTypeSample interface.

The following diagram shows the interface hierarchy for the interfaces listed previously: