I have a speech-to-text function in my app, press & hold the button; a viewcontroller is animated from outside windowbounds into view and recording starts, release the button; recording stops and view is animated out of windowbounds.
Suddenly I'm getting some crashreports via Firebase Crashreporting that the function is crashing on some users (2 users / 5 instances, all the same incident).. Below is the code where my crashlog-events points me to.. BUT, I simply can't reproduce the error, I've tried maybe a 1000 times, stressloading (monkey-button-mashing it, etc.), it won't crash on my device..
Can anybody help me dissect the stacktrace in the bottom / advice? / have suggestions as to what is going wrong? what I can do to stabilize?
To my understanding it revolves around the installTapOnBus:0? Any suggestions for next step?
_audioEngine = [[AVAudioEngine alloc] init];
_speechRecognizer = [[SFSpeechRecognizer alloc] initWithLocale:[NSLocale localeWithLocaleIdentifier:@"da"]];
[_speechRecognizer setDelegate:self];
_request = [[SFSpeechAudioBufferRecognitionRequest alloc] init];
AVAudioInputNode *node =[_audioEngine inputNode];
AVAudioFormat *recordingFormat = [node outputFormatForBus:0];
[node installTapOnBus:0 bufferSize:1024 format:recordingFormat block:^(AVAudioPCMBuffer * _Nonnull buffer, AVAudioTime * _Nonnull when) {
[_request appendAudioPCMBuffer:buffer];
}];
}
StackTrace:
1 CoreFoundation __exceptionPreprocess + 1232864
2 libobjc.A.dylib objc_exception_throw + 34100
3 CoreFoundation +[NSException raise:format:arguments:] + 1232560
4 AVFAudio AVAE_RaiseException(NSString*, ...) + 78280
5 AVFAudio AVAudioNodeImplBase::CreateRecordingTap(unsigned long, unsigned int, AVAudioFormat*, void (AVAudioPCMBuffer*, AVAudioTime*) block_pointer) + 554488
6 AVFAudio -[AVAudioNode installTapOnBus:bufferSize:format:block:] + 545144
7 shoppinglist 4295363296 + 297696
8 shoppinglist 4295358408 + 292808
9 UIKit -[UIViewController loadViewIfRequired] + 65212
10 UIKit -[UIViewController view] + 64152
11 shoppinglist 4295296168 + 230568
12 shoppinglist 4295272504 + 206904
13 shoppinglist 4295266368 + 200768
14 UIKit -[UIViewController _setViewAppearState:isAnimating:] + 162800
15 UIKit -[UIViewController __viewWillAppear:] + 162144
16 UIKit __56-[UIPresentationController runTransitionForCurrentState]_block_invoke + 3540196
17 UIKit _runAfterCACommitDeferredBlocks + 2738508
18 UIKit _cleanUpAfterCAFlushAndRunDeferredBlocks + 2681320
19 UIKit _afterCACommitHandler + 9796
20 CoreFoundation __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 895396
21 CoreFoundation __CFRunLoopDoObservers + 886316
22 CoreFoundation __CFRunLoopRun + 887416
23 CoreFoundation CFRunLoopRunSpecific + 36256
24 GraphicsServices GSEventRunModal + 49264
25 UIKit UIApplicationMain + 479316
26 shoppinglist 4295262124 + 196524
27 libdyld.dylib start + 17816
I also had the same crash but now it's fixed. So you need to check the rate of audio format:
AVAudioInputNode *node =[_audioEngine inputNode];
AVAudioFormat *recordingFormat = [node outputFormatForBus:0];
if (recordingFormat.sampleRate > 0)
{
[node installTapOnBus:0 bufferSize:1024 format:recordingFormat block:^(AVAudioPCMBuffer * _Nonnull buffer, AVAudioTime * _Nonnull when) {
[_request appendAudioPCMBuffer:buffer];
}];
}