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KS_DATARANGE_VIDEO structure (ksmedia.h)

  • Artikel

The KS_DATARANGE_VIDEO structure describes a range of video streams without bob or weave settings.

Syntax

typedef struct tagKS_DATARANGE_VIDEO {
  KSDATARANGE                 DataRange;
  BOOL                        bFixedSizeSamples;
  BOOL                        bTemporalCompression;
  DWORD                       StreamDescriptionFlags;
  DWORD                       MemoryAllocationFlags;
  KS_VIDEO_STREAM_CONFIG_CAPS ConfigCaps;
  KS_VIDEOINFOHEADER          VideoInfoHeader;
} KS_DATARANGE_VIDEO, *PKS_DATARANGE_VIDEO;

Members

DataRange

Specifies the major identifier for the format.

bFixedSizeSamples

Specifies that all the samples are the same size if set to TRUE.

bTemporalCompression

Specifies whether each sample can stand independently on its own, without relying on previous or future samples.

StreamDescriptionFlags

Unused and should be set to zero.

MemoryAllocationFlags

Unused and should be set to zero.

ConfigCaps

Specifies the configuration of the stream, including scaling, cropping, and frame and data rates.

VideoInfoHeader

Specifies the details of the video stream.

Remarks

The KS_DATARANGE_VIDEO structure is used for two related purposes:

  1. At minidriver initialization time, the minidriver returns an array of KS_DATARANGE_VIDEO structures exposing all the supported formats for a given pin, including possible cropping and scaling options.
  2. When a particular format is selected by a user-mode client, the members (and their settings) of this structure determine whether a proposed format is supported by the minidriver. User-mode clients modify the contents of the VideoInfoHeader member but must leave all other members of KS_DATARANGE_VIDEO unchanged. The minidriver then verifies the requested parameters and returns a KS_DATAFORMAT_VIDEO structure. The minidriver then calculates members that are unique to the particular format requested.
For example, a stream that supports RGB16, RGB24, YVU9, and JPEG capture formats defines an array of four KS_DATAFORMAT_VIDEO structures.

Requirements

Requirement Value
Header ksmedia.h (include Ksmedia.h)

See also

KSDATARANGE

KS_VIDEOINFOHEADER

KS_VIDEO_STREAM_CONFIG_CAPS