Re: Getting an AudioDeviceID from device unique identifier (UID)
Re: Getting an AudioDeviceID from device unique identifier (UID)
- Subject: Re: Getting an AudioDeviceID from device unique identifier (UID)
- From: Chris Reed <email@hidden>
- Date: Thu, 24 Apr 2003 11:55:13 -0500
Oops, sorry, didn't see Jeff's reply because Mail.app for some reason
showed the reply as a different thread than the question...
-chris
On Thursday, Apr 24, 2003, at 11:41 US/Central, Chris Reed wrote:
On Wednesday, Apr 23, 2003, at 11:53 US/Central, Sean McBride wrote:
Brad Ford (email@hidden) wrote on Wed, 23 Apr 2003 09:26:13 -0700:
I tried this:
AudioDeviceID myDevice;
AudioValueTranslation trans;
trans.mInputData = (void*)CFSTR ("AppleDBDMAAudioEngine:0");
There's your problem. You need to pass a POINTER to a CFStringRef.
Like this:
CFStringRef myKnownUID = CFSTR("AppleDBDMAAudioEngine:0");
trans.mInputData = &myKnownUID;
Thanks Brad! I should have been more suspicious of the need to cast.
Shouldn't AudioHardwareGetProperty() have returned me an error though?
Perhaps I'm lucky it didn't crash. :)
There's no way for it to know that the pointer you passed is not
pointing to the right thing.
-chris
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