Multimedia Streaming Data Types

This section describes the Microsoft® DirectShow™ multimedia streaming data types.

Data type	Description
STREAM_TIME	Stream time measured in 100-nanosecond increments. This type is defined to be a 64-bit integer.
MSPID	Media stream purpose IDs define the purpose of a media stream. A purpose ID is simply a GUID.
STREAM_TYPE	Defines the direction of data flow for the stream.
STREAM_STATE	Describes the state of the stream.

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STREAM_TYPE

Defines the direction of data flow for the stream.

typedef enum {
	STREAMTYPE_READ         = 0,
	STREAMTYPE_WRITE        = 1,
	STREAMTYPE_TRANSFORM= 2
} STREAM_TYPE;

Values

STREAMTYPE_READ

Application can read the stream.

STREAMTYPE_WRITE

Application can write into the stream.

STREAMTYPE_TRANSFORM

Application reads and writes the stream.

Remarks

Transform streams are read/write where the sample is updated in place.

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STREAM_STATE

Describes the state of the stream.

typedef enum {
	STREAMSTATE_STOP        = 0,
	STREAMSTATE_RUN         = 1
} STREAM_STATE;

Values

STREAMSTATE_STOP

Stop state.

STREAMSTATE_RUN

Run state.

Remarks

The state is controlled by calling the IMultiMediaStream::SetState method.

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