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This interface provides implementation support for the DVD CSS protocol.
A pointer to an IDVDDecoderCSS interface can be obtained by calling the IUnknown::QueryInterface method of an IDVDRenderer:IUnknown object and specifying the IID_IDVDDECODERCSS reference identifier.
The IDVDDecoderCSS interface has the following methods.
| Method | Description |
|---|---|
| IDVDDecoderCSS::SetSectorLength | Sets the sector length, in bytes, for a decoder. |
| IDVDDecoderCSS::NewDisk | Notifies the decoder that a new disk has been inserted. |
| IDVDDecoderCSS::InitiateAuthentication | Called in order to enter authentication and negotiation processes before any key transfer operations can take place. |
| IDVDDecoderCSS::GetChallenge | Gets the challenge key from a decoder chip. |
| IDVDDecoderCSS::SendDriveResponseKey | Sends the drive challenge response to the DVD renderer. |
| IDVDDecoderCSS::SendDriveChallenge | Sends the DVD drive challenge key to the DVD decoder. |
| IDVDDecoderCSS::GetResponseKey | Gets the DVD chip challenge response key. |
| IDVDDecoderCSS::ResetAuthentication | Terminates the authentication process. |
| IDVDDecoderCSS::SendScrambledDiskKeyData | Transfers the 2048-byte scrambled disk key data. |
| IDVDDecoderCSS::SendTitleKey | Sends the title key to the appropriate location. |
| IDVDDecoderCSS::EnableDescrambler | Enables the descrambler at the end of title authentication process and before playback has begun. |
| IDVDDecoderCSS::BypassDescrambler | Bypasses the descrambler for disks with fake encryption. |
The IDVDDecoderCSS interface, like all COM interfaces, inherits the IUnknown interface methods. The IUnknown interface supports the following three methods:
The following code needs to be implemented and exposed by the decoder in order to implement DVD CSS protocol. It needs to be QI-able from the IDVDRenderer interface.
typedef struct { UINT8 key[5]; } CSS_KEY;
typedef struct { UINT8 challenge[10]; } CSS_CHALLENGE;
typedef struct { UINT8 sdks[2048]; } CSS_SDKS;
Requirements
OS Versions: Windows CE .NET 4.0 and later.
Header: Dvdcss.idl.
See Also
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