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| MF_S_TRANSFORM_DO_NOT_PROPAGATE_EVENT | MF_S_WAIT_FOR_POLICY_SET |
MF_S_PROTECTION_NOT_REQUIRED
MF_S_PROTECTION_NOT_REQUIRED is a success status from the protected-media policy path. It means the current stream or action does not require an output-protection requirement to be enforced at this stage. Treating it as a failure can cause an application to abort a presentation that the policy engine has already accepted.
Use the status to separate protected and unprotected policy paths
- Record the stream identifier and requested action, such as play, copy, or transcode.
- Compare the result with the policies generated for other protected streams in the same topology; each protected stream has its own input trust authority.
- Do not invent an HDCP, trusted-audio, or other output schema when the ITA did not require one.
The status is different from MF_E_POLICY_UNSUPPORTED. The latter means required policy could not be enforced by an output. Here, the policy path concluded that protection is unnecessary. Continue the normal Media Foundation state flow and investigate later failures at their actual stage rather than converting this status into a generic DRM error.
Microsoft: IMFInputTrustAuthority · Microsoft: IMFOutputPolicy · Wine: Media Foundation HRESULT definitions
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