IOFireWireAVCNub

Inherits from
IOService
Availability
Available in OS X v10.2 and later.
Declared in
IOFireWireAVCUnit.h

Overview

nub for AVC devices

Tasks

Miscellaneous

Instance Methods

AVCCommand

Sends an AVC command to the device and stores the response.

virtual IOReturn AVCCommand( const UInt8 *command, UInt32 cmdLen, UInt8 *response, UInt32 *responseLen) = 0;
Parameters
command

Pointer to command to send.

cmdLen

Length of the command.

response

Pointer to place to store the response.

responseLen

Pointer to response length - initialize to the size of the buffer pointed to by response, updated to the number of bytes returned by the device.

AVCCommandInGeneration

Sends an AVC command to the device and stores the response. The command must complete in the specified FireWire bus generation otherwise kIOFireWireBusReset is returned.

virtual IOReturn AVCCommandInGeneration( UInt32 generation, const UInt8 *command, UInt32 cmdLen, UInt8 *response, UInt32 *responseLen) = 0;
Parameters
generation

The bus generation that the command must execute in.

command

Pointer to command to send.

cmdLen

Length of the command.

response

Pointer to place to store the response.

responseLen

Pointer to response length - initialize to the size of the buffer pointed to by response, updated to the number of bytes returned by the device.

getDevice

Returns the FireWire device nub that is this object's provider .

IOFireWireNub* getDevice() const ;

updateAVCCommandTimeout

By default, AVCCommands timeout 10 seconds after receiving an Interim response. This function resets the timeout of the current command to 10 seconds from the current time. Call this repeatedly for AVC commands that take a very long time to execute to prevent premature timeout.

virtual IOReturn updateAVCCommandTimeout() = 0;