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ICaptionServiceDescriptor interface (atscpsipparser.h)

  • Articolo

[The feature associated with this page, Microsoft TV Technologies, is a legacy feature. Microsoft strongly recommends that new code does not use this feature.]

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

The ICaptionServiceDescriptor interface enables the client to get caption service descriptors from a Program and System Information Protocol (PSIP) table in an ATSC stream. The content advisor descriptor may be present in the event information table (EIT). For more information, refer to ATSC Standard A/65B, Program and System Information Protocol for Terrestrial Broadcast and Cable (Revision B).

Inheritance

The ICaptionServiceDescriptor interface inherits from the IUnknown interface. ICaptionServiceDescriptor also has these types of members:

Methods

The ICaptionServiceDescriptor interface has these methods.

 
ICaptionServiceDescriptor::GetCaptionServiceNumber

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

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

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

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

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

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

Remarks

To obtain a pointer to this interface, do the following:

  1. Call IAtscPsipParser::GetEIT to get the IATSC_EIT interface.
  2. Call IATSC_EIT::GetRecordDescriptorByTag and pass in the caption service descriptor tag (0x86). If the descriptor is present, the method returns an IGenericDescriptor pointer.
  3. Query the returned IGenericDescriptor pointer for the ICaptionServiceDescriptor interface.

Requirements

Requirement Value
Target Platform Windows
Header atscpsipparser.h

See also

BDA Interfaces