这是一个启动audioEngine的函数。
- (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];
}
}
iOS 14 中 self.audioEngine.inputNode 行崩溃。
以下是一些错误日志：
[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
PO bt 在控制台中显示：
(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)
iOS 14。Xcode 12-beta。
在 self.audioEngine.inputNode 行崩溃。 iOS14 崩溃。 iOS14之前不会崩溃。
为什么？ iOS 14 中的系统 API 错误？
