ADC Home > Reference Library > Reference > Hardware & Drivers > I/O Kit Framework Reference

IOAudioLib.h

Include Path:	<IOKit/audio/IOAudioLib.h>
Path:	/System/Library/Frameworks/IOKit.framework/Versions/A/Headers/audio/IOAudioLib.h
Includes:	<IOKit/audio/IOAudioTypes.h>

Overview

This header includes the C interface to IOAudio functions, used for controlling audio devices. Developers are encouraged to use the Core Audio HAL rather than attempting to control an audio device directly.

For more information on the Core Audio HAL, download the Core Audio SDK from http://developer.apple.com/audio/.

Functions

IOAudioFlush: Indicate the position at which the audio stream can be stopped.
IOAudioIsOutput: Determines if the audio stream is an output stream
IOAudioSetErase: Set autoerase flag, returns old value

IOAudioFlush

Indicate the position at which the audio stream can be stopped.

kern_return_t IOAudioFlush(
    io_connect_t connect,
    IOAudioStreamPosition *end);

Parameters

connect: the audio stream
end: the position

Return Value

kern_return_t

IOAudioIsOutput

Determines if the audio stream is an output stream

kern_return_t IOAudioIsOutput(
    io_service_t service,
    int *out);

Parameters

service
out

Return Value

kern_return_t

IOAudioSetErase

Set autoerase flag, returns old value

kern_return_t IOAudioSetErase(
    io_connect_t connect,
    int erase,
    int *oldVal);

Parameters

connect: the audio stream
erase: true to turn off, false otherwise
oldVal: previous value

Return Value

kern_return_t

Did this document help you?

Yes: Tell us what works for you.

It’s good, but: Report typos, inaccuracies, and so forth.

It wasn’t helpful: Tell us what would have helped.

Last Updated: 2008-03-11