Structure

IOFireWireLocalIsochPortInterface

FireWire user client local isochronous port object.

Declaration

typedef struct IOFireWireLocalIsochPortInterface_t {
    ...
} IOFireWireLocalIsochPortInterface;

Overview

Represents a FireWire isochronous talker or listener within the local machine. Isochronous transfer is controlled by an associated DCL (Data Stream Control Language) program, which is similar to a hardware DMA program but is hardware agnostic. DCL programs can be written using the IOFireWireDCLCommandPoolInterface object.

This interface contains all methods of IOFireWireIsochPortInterface and IOFireWireLocalIsochPortInterface. This interface will contain all v2 methods of IOFireWireLocalIsochPortInterface when instantiated as v2 or newer.

Transfer buffers for the local isoch port must all come from a single allocation made with vm_allocate() or mmap(..., MAP_ANON ).

Calling vm_deallocate() on the buffers before deallocating a local isoch port object may result in a deadlock.

Note: Calling Release() on the local isoch port may not immediately release the isoch port; so it may not be safe to call vm_deallocate() on your transfer buffers. To guarantee the port has been release, run the isochronous runloop until the port is finalized (it has processed any pending callbacks). The finalize callback will be called when the port is finalized. Set the finalize callback using SetFinalizeCallback().

Topics

Miscellaneous

AllocatePort

The method is called when the port should configure its associated hardware to prepare to send or receive isochronous data on the channel number and at the speed specified.

GetRefCon

Get reference value associated with this port.

GetSupported

The method is called to determine which FireWire isochronous channels and speed this port supports.

ModifyJumpDCL

Change the jump target label of a jump DCL.

ModifyTransferPacketDCL

Modify the transfer size of a transfer packet DCL (send or receive)

ModifyTransferPacketDCLBuffer

NOT IMPLEMENTED. Modify the transfer size of a transfer packet DCL (send or receive)

ModifyTransferPacketDCLSize

Modify the transfer size of a transfer packet DCL (send or receive)