音频引擎在调用停止音频引擎功能时崩溃。
以下是我用来启动和停止音频引擎的功能。
public func start_record() {
if audioEngine.isRunning {
regonised_text = ""
print("audio engine running")
audioEngine.inputNode?.removeTap(onBus: 0)
audioEngine.stop()
recognitionRequest?.endAudio()
audioEngine.reset()
} else {
print("audio engine not running")
speech_reconginiser.text = ""
speech_reconginiser.result = false
startRecording()
}
}
此功能用于start_recording音频。
public func startRecording() {
if recognitionTask != nil {
recognitionTask?.cancel()
recognitionTask = nil
}
let audioSession = AVAudioSession.sharedInstance()
do {
try audioSession.setCategory(AVAudioSessionCategoryRecord)
try audioSession.setMode(AVAudioSessionModeMeasurement)
try audioSession.setActive(true, with: .notifyOthersOnDeactivation)
} catch {
print("audioSession properties weren't set because of an error.")
}
recognitionRequest = SFSpeechAudioBufferRecognitionRequest()
guard let inputNode = audioEngine.inputNode else {
fatalError("Audio engine has no input node")
}
guard let recognitionRequest = recognitionRequest else {
fatalError("Unable to create an SFSpeechAudioBufferRecognitionRequest object")
}
recognitionRequest.shouldReportPartialResults = true
recognitionTask = speechRecognizer.recognitionTask(with: recognitionRequest, resultHandler: { (result, error) in
var isFinal = false
if result != nil {
self.speech_reconginiser.text = ""
self.regonised_text = (result?.bestTranscription.formattedString)!
// print("Final text :", self.regonised_text)
self.speech_reconginiser.result = true
self.speech_reconginiser.text = self.regonised_text
// print("Final text 1213 :",self.speech_reconginiser.text)
isFinal = (result?.isFinal)!
} else {
self.speech_reconginiser.text = ""
self.speech_reconginiser.result = false
self.speech_reconginiser.text = ""
}
if error != nil || isFinal {
self.audioEngine.stop()
inputNode.removeTap(onBus: 0)
self.recognitionRequest = nil
self.recognitionTask = nil
}
})
let recordingFormat = inputNode.outputFormat(forBus: 0)
inputNode.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { (buffer, when) in
self.recognitionRequest?.append(buffer)
}
audioEngine.prepare()
do {
try audioEngine.start()
} catch {
print("audioEngine couldn't start because of an error.")
}
}
这是堆栈跟踪
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BREAKPOINT (code=1, subcode=0x18cd96ea8)
* frame #0: 0x000000018cd96ea8 CoreFoundation`___forwarding___ + 744
frame #1: 0x000000018cc92d4c CoreFoundation`_CF_forwarding_prep_0 + 92
frame #2: 0x000000018cc72a80 CoreFoundation`-[__NSArrayI dealloc] + 84
frame #3: 0x000000018b812134 libobjc.A.dylib`(anonymous namespace)::AutoreleasePoolPage::pop(void*) + 836
frame #4: 0x000000018cc6eb28 CoreFoundation`_CFAutoreleasePoolPop + 28
frame #5: 0x000000018cc729c0 CoreFoundation`CFRunLoopTimerInvalidate + 616
frame #6: 0x000000018cd417dc CoreFoundation`__CFRunLoopDoTimer + 908
frame #7: 0x000000018cd41068 CoreFoundation`__CFRunLoopDoTimers + 244
frame #8: 0x000000018cd3ec8c CoreFoundation`__CFRunLoopRun + 1484
frame #9: 0x000000018cc6eda4 CoreFoundation`CFRunLoopRunSpecific + 424
frame #10: 0x000000018e6d9074 GraphicsServices`GSEventRunModal + 100
frame #11: 0x0000000192f29c9c UIKit`UIApplicationMain + 208
frame #12: 0x0000000100542a2c GraspIO-Dev`main at AppDelegate.swift:22
frame #13: 0x000000018bc7d59c libdyld.dylib`start + 4
thread #4
frame #0: 0x000000018bd8da88 libsystem_kernel.dylib`__workq_kernreturn + 8
frame #1: 0x000000018be52fd0 libsystem_pthread.dylib`_pthread_wqthread + 792
frame #2: 0x000000018be52cac libsystem_pthread.dylib`start_wqthread + 4
thread #5
frame #0: 0x0000000103a80c80 libdispatch.dylib`_dispatch_introspection_thread_add + 188
frame #1: 0x0000000103a65380 libdispatch.dylib`_dispatch_worker_thread3 + 112
frame #2: 0x000000018be53100 libsystem_pthread.dylib`_pthread_wqthread + 1096
frame #3: 0x000000018be52cac libsystem_pthread.dylib`start_wqthread + 4
thread #6, name = 'com.apple.uikit.eventfetch-thread'
frame #0: 0x000000018bd6f224 libsystem_kernel.dylib`mach_msg_trap + 8
frame #1: 0x000000018bd6f09c libsystem_kernel.dylib`mach_msg + 72
frame #2: 0x000000018cd40e90 CoreFoundation`__CFRunLoopServiceMachPort + 192
frame #3: 0x000000018cd3eae4 CoreFoundation`__CFRunLoopRun + 1060
frame #4: 0x000000018cc6eda4 CoreFoundation`CFRunLoopRunSpecific + 424
frame #5: 0x000000018d789db4 Foundation`-[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304
frame #6: 0x000000018d7aab84 Foundation`-[NSRunLoop(NSRunLoop) runUntilDate:] + 96
frame #7: 0x00000001938b3830 UIKit`-[UIEventFetcher threadMain] + 136
frame #8: 0x000000018d887318 Foundation`__NSThread__start__ + 996
frame #9: 0x000000018be5568c libsystem_pthread.dylib`_pthread_body + 240
frame #10: 0x000000018be5559c libsystem_pthread.dylib`_pthread_start + 284
frame #11: 0x000000018be52cb4 libsystem_pthread.dylib`thread_start + 4
thread #8
frame #0: 0x000000018be52ca8 libsystem_pthread.dylib`start_wqthread
thread #9
frame #0: 0x000000018bd8da88 libsystem_kernel.dylib`__workq_kernreturn + 8
frame #1: 0x000000018be52fd0 libsystem_pthread.dylib`_pthread_wqthread + 792
frame #2: 0x000000018be52cac libsystem_pthread.dylib`start_wqthread + 4
thread #10
frame #0: 0x000000018be52ca8 libsystem_pthread.dylib`start_wqthread
thread #11, name = 'com.apple.NSURLConnectionLoader'
frame #0: 0x000000018bd6f224 libsystem_kernel.dylib`mach_msg_trap + 8
frame #1: 0x000000018bd6f09c libsystem_kernel.dylib`mach_msg + 72
frame #2: 0x000000018cd40e90 CoreFoundation`__CFRunLoopServiceMachPort + 192
frame #3: 0x000000018cd3eae4 CoreFoundation`__CFRunLoopRun + 1060
frame #4: 0x000000018cc6eda4 CoreFoundation`CFRunLoopRunSpecific + 424
frame #5: 0x000000018d47bdf4 CFNetwork`+[NSURLConnection(Loader) _resourceLoadLoop:] + 404
frame #6: 0x000000018d887318 Foundation`__NSThread__start__ + 996
frame #7: 0x000000018be5568c libsystem_pthread.dylib`_pthread_body + 240
frame #8: 0x000000018be5559c libsystem_pthread.dylib`_pthread_start + 284
frame #9: 0x000000018be52cb4 libsystem_pthread.dylib`thread_start + 4
thread #12, name = 'com.apple.CFStream.LegacyThread'
frame #0: 0x000000018bd6f224 libsystem_kernel.dylib`mach_msg_trap + 8
frame #1: 0x000000018bd6f09c libsystem_kernel.dylib`mach_msg + 72
frame #2: 0x000000018cd40e90 CoreFoundation`__CFRunLoopServiceMachPort + 192
frame #3: 0x000000018cd3eae4 CoreFoundation`__CFRunLoopRun + 1060
frame #4: 0x000000018cc6eda4 CoreFoundation`CFRunLoopRunSpecific + 424
frame #5: 0x000000018cd4e794 CoreFoundation`_legacyStreamRunLoop_workThread + 268
frame #6: 0x000000018be5568c libsystem_pthread.dylib`_pthread_body + 240
frame #7: 0x000000018be5559c libsystem_pthread.dylib`_pthread_start + 284
frame #8: 0x000000018be52cb4 libsystem_pthread.dylib`thread_start + 4
thread #13, name = 'com.apple.CFSocket.private'
frame #0: 0x000000018bd8d23c libsystem_kernel.dylib`__select + 8
frame #1: 0x000000018cd47cb0 CoreFoundation`__CFSocketManager + 632
frame #2: 0x000000018be5568c libsystem_pthread.dylib`_pthread_body + 240
frame #3: 0x000000018be5559c libsystem_pthread.dylib`_pthread_start + 284
frame #4: 0x000000018be52cb4 libsystem_pthread.dylib`thread_start + 4
thread #14
frame #0: 0x000000018bd6f278 libsystem_kernel.dylib`semaphore_timedwait_trap + 8
frame #1: 0x0000000103a7f238 libdispatch.dylib`_os_semaphore_timedwait + 92
frame #2: 0x0000000103a67db8 libdispatch.dylib`_dispatch_semaphore_wait_slow + 72
frame #3: 0x0000000103a66f8c libdispatch.dylib`_dispatch_worker_thread + 272
frame #4: 0x000000018be5568c libsystem_pthread.dylib`_pthread_body + 240
frame #5: 0x000000018be5559c libsystem_pthread.dylib`_pthread_start + 284
frame #6: 0x000000018be52cb4 libsystem_pthread.dylib`thread_start + 4
thread #15, name = 'AVAudioSession Notify Thread'
frame #0: 0x000000018bd6f224 libsystem_kernel.dylib`mach_msg_trap + 8
frame #1: 0x000000018bd6f09c libsystem_kernel.dylib`mach_msg + 72
frame #2: 0x000000018cd40e90 CoreFoundation`__CFRunLoopServiceMachPort + 192
frame #3: 0x000000018cd3eae4 CoreFoundation`__CFRunLoopRun + 1060
frame #4: 0x000000018cc6eda4 CoreFoundation`CFRunLoopRunSpecific + 424
frame #5: 0x00000001a6fb54f4 AVFAudio`GenericRunLoopThread::Entry(void*) + 164
frame #6: 0x00000001a6fdb814 AVFAudio`CAPThread::Entry(CAPThread*) + 84
frame #7: 0x000000018be5568c libsystem_pthread.dylib`_pthread_body + 240
frame #8: 0x000000018be5559c libsystem_pthread.dylib`_pthread_start + 284
frame #9: 0x000000018be52cb4 libsystem_pthread.dylib`thread_start + 4
我无法找到它是如何发生的，我在堆栈溢出中进行了相当大的搜索然后我发现由于输入节点没有变为空而停止音频引擎。我得到的错误是“ EXC_BAD_ACCESS（代码= 1，地址= 0x20）”
答案 0 :(得分：0)
试试这个：
layout基本上将您的RadioButtons表单 let recordingFormat = inputNode.inputFormat(forBus: 0)
inputNode.installTap(onBus: 0, bufferSize: 1024, format: recordingFormat) { (buffer, when) in
self.recognitionRequest?.append(buffer)
}
audioEngine.prepare()
do {
try audioEngine.start()
} catch {
print("audioEngine couldn't start because of an error.")
}
更改为recordingFormat。
这个代码块（上面）是否应该在outputFormat块内？如果您不确定，请尝试将代码放在该块中。