Hi
I am porting an app I wrote in C some years ago to Swift. The original app
still works, but one part of the port refuses to work. The code is...
var id: AudioDeviceID? = kAudioObjectUnknown
var size: UInt32 = 0
// Get the default input device
var inputDeviceAOPA: AudioObjectPropertyAddress =
AudioObjectPropertyAddress(mSelector:
kAudioHardwarePropertyDefaultInputDevice,
mScope: kAudioObjectPropertyScopeGlobal,
mElement:
kAudioObjectPropertyElementMaster)
// Get size
status =
AudioObjectGetPropertyDataSize(UInt32(kAudioObjectSystemObject),
&inputDeviceAOPA,
0, nil, &size)
if (status != noErr)
{
// AudioObjectGetPropertyDataSize
NSLog("Error in AudioObjectGetPropertyData: " +
"kAudioHardwarePropertyDefaultInputDevice %d", status)
return status
}
// Get device
status =
AudioObjectGetPropertyData(UInt32(kAudioObjectSystemObject),
&inputDeviceAOPA,
0, nil, &size, &id)
if (status != noErr)
{
// AudioObjectGetPropertyData
NSLog("Error in AudioObjectGetPropertyData: " +
"kAudioHardwarePropertyDefaultInputDevice %d", status)
return status
}
NSLog("System input device %d", id!)
// Set the audio unit device
status =
AudioUnitSetProperty(output!,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global,
0, &id, size)
if (status != noErr)
{
// AudioUnitSetProperty
NSLog("Error in AudioUnitSetProperty: " +
"kAudioOutputUnitProperty_CurrentDevice " +
AudioUnitErrString(status))
return status
}
The log output is...Cynthia:Tuner bill$ ./Tuner
2018-02-17 13:34:20.902 Tuner[978:27452] AudioUnit input device 71
2018-02-17 13:34:20.902 Tuner[978:27452] System input device 392018-02-17
13:34:20.903 Tuner[978:27452] Error in AudioUnitSetProperty:
kAudioOutputUnitProperty_CurrentDevice AudioUnitErr_InvalidPropertyValue
Any clue would be most welcome.
RegardsBill Farmer
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