I'm developing an iOS application that uses Core Audio. When I'm running the app on Silicon Macbook, the first time I call AudioUnitSetProperty the following error is logged:
CARP violation: using HAL semantics (AUIOImpl_Base)
Are others getting this, and is this part of normal process?
I'm also getting AQMEIO_HAL.cpp:862 kAudioDevicePropertyMute returned err 2003332927 when I set kAudioOutputUnitProperty_EnableIO for input.
The full stack trace was flagging the post as sensitive, but let's see if I can post it as comment
0 0x198aad9cc HandleCARPViolation + 212
1 0x10ddaea24 AUNewPitchFactory + 7284
2 0x10ddb84f4 AUNewPitchFactory + 46916
... and my code shows up here
The stack trace would continue, but figuring out which exact part is sensitive language feels a bit too much now.
I don't know if this is any help to you, but 2003332927 is 'who?', or kCMIOHardwareUnknownPropertyError.
In case you don't know, you can paste the number into the calculator app on macOS, use cmd-3 to display the programmers calculator and clock the little ASCII button.
Are you using AudioObjectHasProperty before calling AudioUnitSetProperty?
Thank you, I knew that. The problem is that I'm not setting kAudioDevicePropertyMute. This is an iOS app running on compatibility layer in macOS and iOS does not even have that property available. I am setting kAudioOutputUnitProperty_EnableIO which exists, and is required for starting input. It also seems that no matter which order I set the properties, setting the first one always triggers this error message.
The full stack trace:
CARP violation: using HAL semantics (AUIOImpl_Base)
0 0x19c3e59cc HandleCARPViolation + 212
1 0x108fdea24 AUNewPitchFactory + 7284
2 0x108fe84f4 AUNewPitchFactory + 46916
...
My code goes here
...and the bottom part:
CARP violation: using HAL semantics (AUIOImpl_Base)
3 0x108ffc7e8 AUMultibandCompressorFactory + 3716
4 0x108ffc758 AUMultibandCompressorFactory + 3572
5 0x108fe0cdc AUNewPitchFactory + 16172
6 0x108fe0460 AUNewPitchFactory + 14000
7 0x108fe3e64 AUNewPitchFactory + 28852
8 0x1090b2f00 AUNotQuiteSoSimpleTimeFactory + 21788
9 0x1090b8278 AUNotQuiteSoSimpleTimeFactory + 43156
10 0x18e7b7050 AudioUnitSetProperty + 548
Looks like AUPitchFactory followed by AUMultibandCompressorFactory was the naughty part, but in separate posts they are fine.