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This interface provides methods that control a multimedia stream and provide access to its underlying media streams.
A multimedia stream is the highest-level streaming object and can contain one or more media streams.
Although each media stream is media-type specific (audio, video, and so on), multimedia streams are generic across all types because they must provide access to a number of streams that can have different media types.
The IMultiMediaStream interface methods enable you to enumerate and retrieve pointers to the specific streams; the IMediaStream interface methods provide specific control over the media stream behavior.
Implement this interface when you want to create containers for a specific type of media stream.
Use this interface when your application must enumerate and control a multimedia stream's underlying, type-specific streams.
Methods in Vtable Order
The following table shows the methods that appear in the Vtable beneath the standard COM methods inherited from IUnknown.
| Method | Description |
|---|---|
| GetInformation | Retrieves the capabilities and stream type of a multimedia stream. |
| GetMediaStream | Retrieves a media stream that has the specified purpose ID. |
| EnumMediaStreams | Retrieves a media stream from a multimedia stream by zero-based index. |
| GetState | Retrieves the multimedia stream's current state. |
| SetState | Sets the media stream to either a running or stopped state. |
| GetTime | Retrieves the current time from the multimedia stream's clock, if it has a clock. |
| GetDuration | Retrieves the media stream's duration. |
| Seek | Sets the seek location of all derived media streams to the specified time. |
| GetEndOfStreamEventHandle | Retrieves the handle for the event triggered when the stream completes playback. |
Requirements
DirectShow applications and DirectShow filters have different include file and link library requirements.
For more information, see Setting Up the Build Environment.
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
See Also
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