OPM supports all of Certified Output Protection Protocol's (COPP) features. The following describes some new OPM features and how some OPM features compare to COPP features:
OPM requires that applications sign requests for information from the video output while COPP does not require that applications sign requests for information from the graphics driver.
Note A COPP graphics driver is equivalent to an OPM video output.
COPP applications request information from a graphics driver by causing a [**DXVA\_COPPStatusInput**](https://msdn.microsoft.com/library/windows/hardware/ff563899) structure to be passed to the driver.
OPM supports High-bandwidth Digital Content Protection (HDCP) repeaters. For more information about HDCP repeaters, see the HDCP Specification Revision 1.1.
Applications can more easily support HDCP in OPM. Applications are not required to parse HDCP System Renewability Messages (SRMs) and to determine if a monitor was revoked. For more information about HDCP SRMs, see the HDCP Specification Revision 1.1.
OPM uses X.509 certificates and COPP uses proprietary XML certificates. The COPP certificate format is based on the signature format in the XML-Signature Syntax and Processing specification. For information about X.509 certificates, see the X.509 Certificate Profile.
COPP applications get the COPP IAMCertifiedOutputProtection interface by creating version 7 or 9 of the Video Mixing Renderer (VMR) and then passing IID_IAMCertifiedOutputProtection to the VMR filter's implementation of IUnknown::QueryInterface. OPM applications get the IOPMVideoOutput interface by passing an HMONITOR or an IDirect3DDevice9 object to the OPMGetVideoOutputsFromHMONITOR or OPMGetVideoOutputsFromIDirect3DDevice9Object function respectively. For more information about these functions and interfaces, see the Microsoft Windows SDK documentation.
OPM supports clone mode in all cases while COPP supports clone mode only in one specific case.
OPM's redistribution control flag has slightly different semantics than COPP's redistribution control flag (COPP_CGMSA_RedistributionControlRequired).