COPP Command Reference
|Microsoft DirectShow 9.0|
This section describes the Certified Output Protection Protocol (COPP) commands. The following commands are defined.
|Set Protection Level||DXVA_COPPSetProtectionLevel|
Set Protection Level Command
Sets the protection level for a specified output protection mechanism. Depending on the connector, it might be possible to apply more than one protection mechanism on the same connector, with different settings for each mechanism.
Input data: A DXVA_COPPSetProtectionLevelCmdData structure.
Set Signaling Command
Specifies information about the video signal other than the protection level.
For CGMS-A, certain protection standards require that the televsion signal contains information about the aspect ratio and other information within the same VBI waveform packets as the CGMS-A bits. Televisions may display poorly if the aspect ratio information is not consistent with the video stream. The application can use this command to specify the aspect ratio so that the graphics driver can generate the correct VBI packets.
This command is also designed to be extensible if additonal signal information is required in future standards.
Input data: A DXVA_COPPSetSignalingCmdData structure.