AVAudioEngine crash in iOS14.

App & System Services Core OS
Mengxiang OP
Created Jun ’20
Replies 8
Boosts 0
Views 3.2k
Participants 5
Version 12.0 beta (12A6159)
iOS14
Simulator

<pre>

  • (void)startAudioEngine {

  NSError *error = nil;
  if (!self.audioEngine.isRunning) {
    self.audioEngine = [[AVAudioEngine alloc] init];
    AVAudioInputNode *inputNode = self.audioEngine.inputNode;
    AVAudioFormat *nativeAudioFormat = [inputNode inputFormatForBus:0];
    _weak typeof(self)weakSelf = self;
    [inputNode installTapOnBus:0 bufferSize:1024 format:nativeAudioFormat block:^(AVAudioPCMBuffer * Nonnull buffer, AVAudioTime * _Nonnull when) {
      [weakSelf.recognitionRequest appendAudioPCMBuffer:buffer];
    }];
    [self.audioEngine prepare];
    [self.audioEngine startAndReturnError:&error];
    if (error) {
      [self stop];
      [self onError:[NSError errorWithDomain:@"startAudioEngine error" code:0 userInfo:nil]];
    }
    else {
      [self activeStatusChanged:MMSpeechRecognizerActiveStatusStared];
    }
  }
  else {
    [self stop];
    [NSError errorWithDomain:@"The audio engine is runing" code:0 userInfo:nil];
  }
}
</pre>

Crashed at self.audioEngine.inputNode line.
Replies  8
Boosts  0
Views  3.2k
Participants  5
macbieoo OP
Jun ’20
I'm also having a problem with AVAudioEngine, but is when I call the prepare method. It works fine in iOS 13 simulator, but crashes in iOS 14.

This is the error I got:

AQDefaultDevice (1): output stream 0: null buffer
EXCEPTION thrown (-50): error != 0
AQDefaultDevice (1): output stream 0: null buffer
Initialize: Mach message timeout. Apparently deadlocked. Aborting now.
1
Mengxiang OP
Jul ’20
The error log:

Code Block 
[plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x6000032144c0> F8BB1C28-BAE8-11D6-9C31-00039315CD46
HALB_IOBufferManager_Client::GetIOBuffer: the stream index is out of range
HALB_IOBufferManager_Client::GetIOBuffer: the stream index is out of range
[aqme] 255: AQDefaultDevice (1): output stream 0: null buffer
[aqme] 1778: EXCEPTION thrown (-50): error != 0
 Initialize: Mach message timeout. Apparently deadlocked. Aborting now.
CoreSimulator 725.10 - Device: iPhone 11 (003A9CF3-FDD7-4C44-8607-CAB3FDBB904B) - Runtime: iOS 14.0 (18A5301v) - DeviceType: iPhone 11


Code Block 
(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGABRT
  frame #0: 0x00007fff215a233a libsystem_kernel.dylib`pthread_kill + 10
  frame #1: 0x00007fff215d7e60 libsystem_pthread.dylib`pthread_kill + 430
  frame #2: 0x00007fff200c7c24 libsystem_c.dylib`abort + 120
  frame #3: 0x00000001082ce5c9 AudioToolboxCore`_ReportRPCTimeout(char const*, int) + 90
  frame #4: 0x0000000130cffbd9 libEmbeddedSystemAUs.dylib`_CheckRPCError(char const*, int, int) + 92
  frame #5: 0x0000000130cfc4e0 libEmbeddedSystemAUs.dylib`AURemoteIO::Initialize() + 1878
  frame #6: 0x0000000130d15ec6 libEmbeddedSystemAUs.dylib`AUBase::DoInitialize() + 36
  frame #7: 0x0000000130c9c47f libEmbeddedSystemAUs.dylib`AUMethodInitialize(void*) + 59
  frame #8: 0x00000001083c31bb AudioToolboxCore`-[AUAudioUnitV2Bridge allocateRenderResourcesAndReturnError:] + 77
  frame #9: 0x0000000105aa0dbf AVFAudio`AUInterfaceBaseV3::Initialize() + 45
  frame #10: 0x0000000105a8b90f AVFAudio`AVAudioIONodeImpl::GetInputFormat(unsigned long) + 125
  frame #11: 0x0000000105a8b5d3 AVFAudio`AVAudioIONodeImpl::SetOutputFormat(unsigned long, AVAudioFormat*) + 571
  frame #12: 0x0000000105a86022 AVFAudio`-[AVAudioNode setOutputFormat:forBus:] + 70
  frame #13: 0x0000000105a9d1e3 AVFAudio`AVAudioEngineImpl::UpdateInputNode(bool) + 921
  frame #14: 0x0000000105a98fd8 AVFAudio`-[AVAudioEngine inputNode] + 88
 * frame #15: 0x0000000102c64391 iOS14Demo`-[MMSpeechRecognizer startAudioEngine](self=0x0000600002777c40, _cmd="startAudioEngine") at MMSpeechRecognizer.m:72:56
  frame #16: 0x0000000102c651fd iOS14Demo`-[MMSpeechRecognizer start](self=0x0000600002777c40, _cmd="start") at MMSpeechRecognizer.m:175:13
  frame #17: 0x0000000102c63929 iOS14Demo`-[ViewController siriBtnClick:](self=0x00007f8dda60b650, _cmd="siriBtnClick:", sender=0x00007f8ddb80b3a0) at ViewController.m:66:9
  frame #18: 0x0000000114403f15 UIKitCore`-[UIApplication sendAction:to:from:forEvent:] + 83
  frame #19: 0x0000000113d5da2a UIKitCore`-[UIControl sendAction:to:forEvent:] + 223
  frame #20: 0x0000000113d5dd4d UIKitCore`-[UIControl _sendActionsForEvents:withEvent:] + 332
  frame #21: 0x0000000113d5c636 UIKitCore`-[UIControl touchesEnded:withEvent:] + 500
  frame #22: 0x000000011443f389 UIKitCore`-[UIWindow _sendTouchesForEvent:] + 1287
  frame #23: 0x00000001144411ea UIKitCore`-[UIWindow sendEvent:] + 4750
  frame #24: 0x000000011441b39d UIKitCore`-[UIApplication sendEvent:] + 428
  frame #25: 0x00000001144aabb1 UIKitCore`processEventQueue + 14793
  frame #26: 0x00000001144a175f UIKitCore`eventFetcherSourceCallback + 106
  frame #27: 0x00000001034f18bc CoreFoundation`CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
  frame #28: 0x00000001034f17fb CoreFoundation`CFRunLoopDoSource0 + 157
  frame #29: 0x00000001034f0f3f CoreFoundation`CFRunLoopDoSources0 + 222
  frame #30: 0x00000001034eba20 CoreFoundation`CFRunLoopRun + 882
  frame #31: 0x00000001034eb2fa CoreFoundation`CFRunLoopRunSpecific + 538
  frame #32: 0x00000001081ebdb3 GraphicsServices`GSEventRunModal + 139
  frame #33: 0x00000001143fd942 UIKitCore`-[UIApplication _run] + 912
  frame #34: 0x0000000114402f62 UIKitCore`UIApplicationMain + 1570
  frame #35: 0x0000000102c660ca iOS14Demo`main(argc=1, argv=0x00007ffeecf9bc80) at main.m:17:12
  frame #36: 0x00007fff20222941 libdyld.dylib`start + 1
(lldb) 

0
Mengxiang OP
Jul ’20
Hello everyone,

This is an iOS system bug with Apple.

The problem has been resolved by Apple.
Appears in Version 12.0 beta (12A6159).
Resolved in Version 12.0 beta 2 (12A6163b) by Apple.

Next: Update Xcode and test again.

Thanks.
0
macbieoo OP
Aug ’20
Is it working for you guys in beta 4 of Xcode?
0
PrinceCreed OP
Aug ’20
Still crashing for me (on Simulator)
0
Tank_Liu OP
Aug ’20
I also encountered this problem, in xcode12 beta3 and beta4
0
PrinceCreed OP
Aug ’20
Problem solved in Xcode 12 beta 5.
0
NayyerAli OP
Nov ’20
is there any solution to this problem ?
0
AVAudioEngine crash in iOS14.
First post date Last post date
 
 
Q