HostTime

Introduction

This collection of functions provides access to the host's time base. It also provides descriptive information about the time base and translations to and from nanoseconds.

Functions

AudioConvertHostTimeToNanos

Convert the given host time into a time in nanoseconds.

AudioConvertNanosToHostTime

Convert the given nanosecond time into a host time.

AudioGetCurrentHostTime

Gets the current host time.

AudioGetHostClockFrequency

Gets the number of ticks per second in the host time base.

AudioGetHostClockMinimumTimeDelta

Gets the smallest number of ticks that two succeeding values will ever differ. by.

Convert the given host time into a time in nanoseconds.

extern UInt64 AudioConvertHostTimeToNanos(
    UInt64 inHostTime);  

Parameters

inHostTime

A UInt64 containing the host time to convert.

Return Value

A UInt64 containining the converted host time.

Availability

Introduced in Mac OS X v10.0.

Convert the given nanosecond time into a host time.

extern UInt64 AudioConvertNanosToHostTime(
    UInt64 inNanos);  

Parameters

inNanos

A UInt64 containing the nanosecond time to convert.

Return Value

A UInt64 containining the converted nanosecond time.

Availability

Introduced in Mac OS X v10.0.

Gets the current host time.

extern UInt64 AudioGetCurrentHostTime();  

Return Value

A UInt64 containing the current host time.

Availability

Introduced in Mac OS X v10.0.

Gets the number of ticks per second in the host time base.

extern Float64 AudioGetHostClockFrequency();  

Return Value

A Float64 containing the number of ticks per second in the host time base.

Availability

Introduced in Mac OS X v10.0.

Gets the smallest number of ticks that two succeeding values will ever differ. by.

extern UInt32 AudioGetHostClockMinimumTimeDelta();  

Return Value

A UInt32 containing the smallest number of ticks that two succeeding values will ever differ.

Availability

Introduced in Mac OS X v10.0.

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Last Updated: 2006-10-25