IMFContentDecryptionModuleSessionCallbacks::KeyMessage method (mfcontentdecryptionmodule.h)

Called when the Content Decryption Module (CDM) has generated a message for the session.

Syntax

HRESULT KeyMessage(
  MF_MEDIAKEYSESSION_MESSAGETYPE messageType,
  const BYTE                     *message,
  DWORD                          messageSize,
  LPCWSTR                        destinationURL
);

Parameters

messageType

A value from the MF_MEDIAKEYSESSION_MESSAGETYPE enumeration specifying the type of the message.

message

A pointer to a BYTE array containing the message contents. Messages are Key System-specific.

messageSize

The size of the array in the message parameter.

destinationURL

A optional parameter containing the destination URL.

Return value

Returns an HRESULT.

Remarks

KeyMessage is based on the Encrypted Media Extension specification's MediaKeyMessageEvent.

Requirements