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Re: How does one update a view position during a core audio render callback?

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Re: How does one update a view position during a core audio render callback?

Subject: Re: How does one update a view position during a core audio render callback?
From: Paul Davis <email@hidden>
Date: Sat, 07 Mar 2015 20:35:19 -0600

On Sat, Mar 7, 2015 at 8:10 PM, Brian Willoughby <email@hidden> wrote:

2) Playback position is a special case where you don't even need to pass data. The CoreAudio time line will progress in a predictable way. You merely need to make a note of the start time, and then all time stamps afterwards are relative to your start time, and thus reflect your playback position. Loops will require an update to the start time.

or you're slaved to an external positional time reference, or varispeeding for some other reason, or you're moving backwards, or ...

the fact that N samples have elapsed according to the audio hardware clock tells you *nothing* about timeline position except in the simplest possible application.

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References:
	>How does one update a view position during a core audio render callback? (From: "Patrick J. Collins" <email@hidden>)
	>Fwd: How does one update a view position during a core audio render callback? (From: "Dave O'Neill" <email@hidden>)
	>Re: Fwd: How does one update a view position during a core audio render callback? (From: "Patrick J. Collins" <email@hidden>)
	>Re: How does one update a view position during a core audio render callback? (From: Iain Holmes <email@hidden>)
	>Re: How does one update a view position during a core audio render callback? (From: Brian Willoughby <email@hidden>)

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