ISCTE_EAS::GetTableDescriptorByTag method (atscpsipparser.h)

  • Article

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

The GetTableDescriptorByTag method searches the EAS table for a descriptor with the specified descriptor tag.

Syntax

HRESULT GetTableDescriptorByTag(
  [in]      BYTE               bTag,
  [in, out] DWORD              *pdwCookie,
  [out]     IGenericDescriptor **ppDescriptor
);

Parameters

[in] bTag

The descriptor tag to search for.

[in, out] pdwCookie

A pointer to a variable that specifies the start position in the descriptor list. This parameter can be NULL. If the value is NULL, the search starts from the first descriptor in the list. Otherwise, the search starts from the position given in *pdwCookie. When the method returns, the pdwCookie parameter contains the position of the next matching descriptor, if any. You can use this parameter to iterate through the descriptor list, looking for every instance of a particular descriptor tag.

[out] ppDescriptor

Receives a pointer to the IGenericDescriptor interface. Use this interface to retrieve the information in the descriptor. The caller must release the interface.

Return value

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

Return code Description
MPEG2_E_NOT_PRESENT
 The specified tag was not found.
MPEG2_E_OUT_OF_BOUNDS
 Index out of bounds.
MPEG2_E_UNINITIALIZED
 The ISCTE_EAS::Initialize method was not called.
MPEG2_S_MORE_DATA_AVAILABLE
 The record contains at least one more descriptor with this tag.
MPEG2_S_NO_MORE_DATA_AVAILABLE
 The record does not contain any more descriptors with this tag.
S_OK
 The method succeeded.

Requirements

   
Minimum supported client Windows�Vista [desktop apps only]
Minimum supported server None supported
Target Platform Windows
Header atscpsipparser.h

See also

ISCTE_EAS Interface