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IOAudioEngine.h

Overview

This header contains the definition of the IOAudioEngine class. An instance of IOAudioEngine is defined by a single I/O engine to transfer data to or from one or more sample buffers. An audio driver must subclass IOAudioEngine in order to provide certain services, such as starting and stopping the I/O engine when requested.

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Classes

IOAudioEngine

Abstract base class for a single audio audio / I/O engine.

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Typedefs

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IOAudioEnginePosition

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Represents a position in an audio audio engine.

typedef struct { 
    UInt32 fSampleFrame; 
    UInt32 fLoopCount; 
} IOAudioEnginePosition;  

Fields

fSampleFrame

The sample frame within the buffer - starts at 0.

fLoopCount

The number of times the ring buffer has looped.

Discussion

This position is based on the sample frame within a loop around the sample buffer, and the loop count which starts at 0 when the audio engine begins playback.

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Last Updated: 2008-12-19