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2.2.4 Payload Messages

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Payload messages are used to issue rendering and sound commands. Payload messages are sent in client-byte order, as determined by the extender capabilities exchange.

Every payload message has the standard header listed in the following table.


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_size

_msgid

_idObjectSubject

_size (4 bytes): An unsigned 32-bit integer. Describes the total message size, in bytes.

_msgid (4 bytes): A signed 32-bit integer. The message ID that is unique to the specific target. The value specified in _msgid is used to indicate which action to take on the target object.

_idObjectSubject (4 bytes): An unsigned 32-bit integer. The ID of the target object. The _idObjectSubject refers to an object that was previously created by sending a Broker_CreateObject payload.