IDvbSatelliteDeliverySystemDescriptor Interface
| Microsoft DirectShow 9.0 |
IDvbSatelliteDeliverySystemDescriptor Interface
This topic applies to Update Rollup 2 for Microsoft Windows XP Media Center Edition 2005 and later.
The IDvbSatelliteDeliverySystemDescriptor interface enables the client to get a satellite delivery system descriptor from a DVB stream. The satellite delivery system descriptor may be present in the network information table (NIT). For more information, refer to ETSI EN 300 468.
In addition to the methods inherited from IUnknown, the IDvbSatelliteDeliverySystemDescriptor interface exposes the following methods.
| Method | Description |
| GetFECInner | Returns the inner forward error correction (FEC) scheme. |
| GetFrequency | Returns the frequency. |
| GetLength | Returns the length of the descriptor body. |
| GetModulation | Returns the modulation scheme. |
| GetOrbitalPosition | Returns the orbital position. |
| GetPolarization | Returns the polarization of the transmitted signal. |
| GetSymbolRate | Returns the symbol rate. |
| GetTag | Returns the descriptor tag. |
| GetWestEastFlag | Returns a flag that specifies whether the satellite is in the western or eastern part of the orbit. |
Remarks
To obtain a pointer to this interface, do the following:
- Call IDvbSiParser::GetNIT to get the IDVB_NIT interface.
- Call IDVB_NIT::GetRecordDescriptorByTag and pass in the satellite delivery system descriptor tag (0x43). If the descriptor is present, the method returns an IGenericDescriptor pointer.
- Query the returned IGenericDescriptor pointer for the IDvbSatelliteDeliverySystemDescriptor interface.
Requirements
Header: Include dvbsiparser.h.
See Also