Question

I am trying to extract the EIT table using the non-deprecated interface IPSITables from a DVB stream.
I have not found documentation about how to use the getTable method, apart from the msdn documentation http://msdn.microsoft.com/en-us/library/windows/desktop/dd694841%28v=vs.85%29.aspx.

The problem is that I don’t know how to get the dwHashedVer [in] parameter (Hash value that identifies the table contents).

Has anyone used this interface before?

Thanks in advance

Answer 1

I had a read of the ETSI 301-192 spec. The microsoft documentation or this API is almost non-existant. I am taking a shot in the dark here, so please bear with me. In table 8.4.4 there is a field platform_id_hash which is generated from the platform id. The means for getting this hash is also explained in the spec. The platform id is defined as

platform_id: This is a 24 bit field which serves as a label to identify a given IP/MAC platform. Allocation of the value
of this field are found in the TR 101 162 [21].  

Hope this helps