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Re: auval problems (channels)

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Re: auval problems (channels)

Subject: Re: auval problems (channels)
From: William Stewart <email@hidden>
Date: Wed, 1 Nov 2006 11:27:28 -0800

I think the bug in your AU is that you are allowing a stream format to be changed when your AU is initialised?

You are probably missing this:

bool		AUEffectBase::StreamFormatWritable(	AudioUnitScope					scope,
												AudioUnitElement				element)
{
	return IsInitialized() ? false : true;
}

Bill

On 31/10/2006, at 11:41 PM, john smith wrote:

Bill,
Thanks for the reply.
Hi,
I have a problem getting a plug-in to pass in auval. As far as I understand the message, auval claims that the plug-in accepted a 3- in, 1-out channel configuration, even though it's only supposed to accept 1/1, 1/2 and 2/2 configurations.
Yes, this is one of the tests auval runs. In your AU's init call (Have a look at the implementation of Initialise in AUEffectBase), you are required to validate that the I/O configuration for your AU is one that you can support.
Well, I'm doing that. Maybe I should spell out the facts:
A: There's no test for 3-in/1-out when I debug.
B: If there were, I would return with an error. The code only returns with no error when the channel configuration is supported.
Thanks,
Michael Olsen
KeyToSound
Bill
However, I debugged, and it seems to me that 3/1 is not even tested. Right before the "fail" message is shown, a 2/2 configuration is tested (which obviously passes).
Here's the error message:
Input/Output Channel Handling: 1-1 1-2 1-4 1-5 2-2 2-4 2-5 4-4 4-5 5-5 5-2 6-6 8-8 X X X ERROR: Unit incorrectly set to InputChans:3 OutputChans:1
What could be wrong?
Thanks,
Michael Olsen
KeyToSound
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