This is a known issue - at least DTS confirmed this is an AVFoundation bug - , exists from 10.10 Yosemite if I can recall. Please report it at bugreporter.apple.com <http://bugreporter.apple.com/>. I’ve reported it around 6 months ago, but nothing really happened since then. The more bug reports to more chance this will be fixed in 10.14.
Thanks! > On 2018. Feb 9., at 20:53, Christopher Baine <[email protected]> > wrote: > > Hello all, > > I am having an issue with AVAudioEngine starting with an Aggregate Device as > the default output device. Below is my sample code, which works fine with any > other output card selected. When I select an aggregate as my default device > in the System Preferences, it crashes on the engine.connect() call. I am on > 10.13.1, and am having the same issue on 10.12.6 > > > import Cocoa > import AVFoundation > > class ViewController: NSViewController { > > let engine = AVAudioEngine() > let player = AVAudioPlayerNode() > > override func viewDidLoad() { > super.viewDidLoad() > > addPlayer() > startEngine() > } > > > func addPlayer() { > engine.attach(player) > engine.connect(player, to: engine.outputNode, format: nil) > } > > > func startEngine() { > do { > try engine.start() > } > catch { > print("ERROR", error) > } > } > > > Here is the log: > > 2018-02-09 13:53:53.014046-0500 TEST_AVEngineAggregate[18127:655111] [DDAgg] > DefaultDeviceAggregate.cpp:58:GetPreferredStereoChannels: Error getting > preferred stereo channels from device 206: 'who?' > 2018-02-09 13:53:53.014208-0500 TEST_AVEngineAggregate[18127:655111] [DDAgg] > DefaultDeviceAggregate.cpp:108:GetPreferredChannelLayout: Error getting > preferred channel layout from device 206: 'who?' > 2018-02-09 13:53:53.015634-0500 TEST_AVEngineAggregate[18127:655111] [avae] > AVAEInternal.h:69:_AVAE_Check: required condition is false: > [AUInterface.mm:678:EnableIO: (isInput ? auv3().canPerformInput : > auv3().canPerformOutput)] > 2018-02-09 13:53:53.017059-0500 TEST_AVEngineAggregate[18127:655111] > [General] An uncaught exception was raised > 2018-02-09 13:53:53.017075-0500 TEST_AVEngineAggregate[18127:655111] > [General] required condition is false: isInput ? auv3().canPerformInput : > auv3().canPerformOutput > ... > > I have tried checking to see if the preferedChannelLayout, or the > preferredStereoChannels is an issue, via: > > func getOutputCardPrefferedChannels(id: AudioObjectID) { > var propAddress = AudioObjectPropertyAddress(mSelector: > kAudioDevicePropertyPreferredChannelsForStereo, mScope: > kAudioObjectPropertyScopeOutput, mElement: kAudioObjectPropertyElementMaster) > var prop: Array<UInt32> = Array(repeating: 0, count: 2) > var propertySize: UInt32 = UInt32(MemoryLayout.size(ofValue: prop)) > let err = AudioObjectGetPropertyData(id, &propAddress, 0, nil, > &propertySize, &prop) > print(err, prop) > > } > > > func getOutputCardPrefferedChannelLayout(id: AudioObjectID) { > var propAddress = AudioObjectPropertyAddress(mSelector: > kAudioDevicePropertyPreferredChannelLayout, mScope: > kAudioObjectPropertyScopeOutput, mElement: kAudioObjectPropertyElementMaster) > var prop: AudioChannelLayout = AudioChannelLayout() > var propertySize: UInt32 = UInt32(MemoryLayout.size(ofValue: prop)) > let err = AudioObjectGetPropertyData(id, &propAddress, 0, nil, > &propertySize, &prop) > print(err, prop) > } > > > > Which prints: > ***** AGGREGATE ******** > > Aggregate Device > 0 [1, 2] > 0 AudioChannelLayout(mChannelLayoutTag: 0, mChannelBitmap: > __C.AudioChannelBitmap(rawValue: 0), mNumberChannelDescriptions: 4, > mChannelDescriptions: __C.AudioChannelDescription(mChannelLabel: 4294967295, > mChannelFlags: __C.AudioChannelFlags(rawValue: 0), mCoordinates: (0.0, 0.0, > 0.0))) > > > ****** BUILT IN OUTPUT ******** > > Built-in Output > 0 [1, 2] > 0 AudioChannelLayout(mChannelLayoutTag: 0, mChannelBitmap: > __C.AudioChannelBitmap(rawValue: 0), mNumberChannelDescriptions: 2, > mChannelDescriptions: __C.AudioChannelDescription(mChannelLabel: 4294967295, > mChannelFlags: __C.AudioChannelFlags(rawValue: 0), mCoordinates: (0.0, 0.0, > 0.0))) > > > These don't throw any errors. > > The aggregate consists of the Built In Output, and SoundFlower 2ch. (So 4ch > output total) I have also tried making an aggregate with only the built-in > output as well as aggregates with other output cards, but it also crashes. > > Any help or thoughts on where to begin troubleshooting this would be greatly > appreciated! > Thanks, > Chris > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Coreaudio-api mailing list ([email protected]) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/coreaudio-api/tamas.lov.nagy%40gmail.com > > This email sent to [email protected]
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