Apple

To be honest I wasn't expecting any way of doing what I was asking without creating an offline unit, I just needed to check with people more experienced than myself!

Unfortunately I can't use offline units because the applications that will be running it don't support them.

I think I'll end up accepting a very small error as it's working at the moment!

From: William Stewart [mailto:email@hidden]
Sent: 14 June 2010 21:08
To: Wayne Pickering
Cc: Carl Parker; email@hidden
Subject: Re: Identifying the beginning or end of a data file in an AU

you probably want to look at offline audio units for this

Bill

On Jun 14, 2010, at 9:37 AM, Wayne Pickering wrote:

AudioUnits are fairly stateless when it comes to knowledge of the data flowing through them. You could be in a DAW processing live audio from an input. There is no programmatic way you are ever going to find out what you are asking, so it would be best for you to start considering other alternatives because AudioUnits -do not- work the way you are thinking about them.

HTH,

---

On Jun 14, 2010, at 4:55 AM, Carl Parker wrote:

I’m having an issue with an AU I’m creating to perform normalization analysis on pre-recorded audio files.

Basically I want to know if there is a way of knowing if you’re processing the first (or last) packet of data within the ‘GenericAudioUnitKernel::process()’ for a given audio file?

The application I’m developing it for doesn’t always call GenericAudioUnitKernel::Initialize() before starting to process data, so I’m hoping there’s some other way I can tell that data is being sent from the beginning of a file.

I’m fairly new to xcode and Object-Oriented programming in general, so any help would be greatly appreciated! J

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