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This topic applies to Update Rollup 2 for Microsoft Windows XP Media Center Edition 2005 and later.
The IDVB_NIT interface enables the client to get information from a network information table (NIT). The IDvbSiParser::GetNIT method returns a pointer to this interface.
A NIT contains information about the network and the physical organization of the transport streams. Because a network typically carries more than one transport stream, the NIT can provide information for tuning and for locating particular transport streams. A NIT carried on one network may contain information about another network.
The original_network_id and transport_stream_id fields together uniquely define a transport stream within the network.
The NIT may contain one or more table-wide descriptors. In addition, each record in the NIT may have one or more descriptors. To get the table-wide descriptors, use the GetTableDescriptorByIndex or GetTableDescriptorByTag method. To get the record descriptors, use the GetRecordDescriptorByIndex or GetRecordDescriptorByTag method.
Methods
The IDVB_NIT interface inherits the methods of the IUnknown interface.
In addition, IDVB_NIT defines the following methods.
| Method | Description |
|---|---|
Converts a next table to a current table. |
|
Returns the number of records in the NIT. |
|
Returns the number of table-wide descriptors in the NIT. |
|
Returns the network identifier for the NIT. |
|
Retrieves the next table that follows the current table. |
|
Returns the number of descriptors for a record in the NIT. |
|
Retrieves a descriptor for a specified record in the NIT. |
|
Searches a record in the NIT for a descriptor with a specified descriptor tag. |
|
Returns the original network identifier for a record in the NIT. |
|
Returns the transport stream identifier (TSID) for a record in the NIT. |
|
Retrieves a table-wide descriptor for the NIT. |
|
Searches the NIT for a table-wide descriptor with the specified descriptor tag. |
|
Returns a hash value for this table instance. |
|
Returns the version number for the NIT. |
|
Initializes the object. |
|
Registers the client to be notified when a next table arrives that will replace the current table. |
|
Registers the client to be notified when the table becomes current. |
Requirements
| Header | Declared in Dvbsiparser.h. |
See Also
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Build date: 12/4/2008