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ICaptionServiceDescriptor::GetWideAspectRatio

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Microsoft DirectShow 9.0

ICaptionServiceDescriptor::GetWideAspectRatio

This topic applies to Update Rollup 2 for Microsoft Windows XP Media Center Edition 2005 and later.

The GetWideAspectRatio method queries whether a caption service is formatted for wide-screen displays.

Syntax

  HRESULT GetWideAspectRatio(
    BYTE bIndex,
    BYTE *pbVal
);

Parameters

bIndex

[in]  Zero-based index of the caption service. To get the number of caption services, call ICaptionServiceDescriptor::GetNumberOfServices.

pbVal

[out]  Receives the wide_aspect_ratio:

Value Description
0 The caption service is formatted for a 4:3 aspect ratio.
1 The caption service is formatted for a 16:9 aspect ratio.

Return Values

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code Description
S_OK The method succeeded.
MPEG2_E_INCORRECT_DESCRIPTOR_TAG The table descriptor tag is incorrect.
MPEG2_E_MALFORMED_TABLE The PSIP table is not well formed.
MPEG2_E_OUT_OF_BOUNDS The bIndex parameter is out of range.

Requirements

Header: Include atscpsipparser.h.

See Also