audioIn crashing when exiting app

[ImanolGo]

Hi!

My app is sometimes crashing when exiting the application in the com.apple.audio.IOThread.client;
Apparently the rtStreamPtr pointer is already null;

-> rtStreamPtr->soundInputPtr->audioIn(rtStreamPtr->inputBuffer);

Before exiting the app I call the functions:

ofSoundStreamStop();
audioAnalyzer.exit();

But it still crashes every two times. The inconsistency makes me think it can be a multithread issue, but I don't know where else should I call it.

Any thoughts?

Imanol

[leozimmerman]

Do you know which line causes the error?
ofSoundStreamStop(); audioAnalyzer.exit();

If you comment or turn off the audio analyzer does it work ok?

[ImanolGo]

It happens after I call audioAnalyzer.exit();

[leozimmerman]

Does this error happen also running rmsInput example?
It's weird, because audioAnalyzer.exit() just delete algorithms, no relation to the soundStream

[ImanolGo]

Yes, it also happens in the rmsInput example.

FYI, I'm running it under macOS Sierra 10.12.4, MacBook Pro 15" late 2015.

It also doesn't happen always. So I imagine it has to do with the audio thread.

This is what the debugger shows.

[leozimmerman]

Ok, I´ll check it out.
compute() shouldn't be called once soundStream stopped...
Can you send me the console error log?
And also could you try changing the lines order in the exit function?
first
audioAnalyzer.exit();
and then
ofSoundStreamStop();

[ImanolGo]

I had already try to do first
audioAnalyzer.exit();
and then
ofSoundStreamStop();

with the same result

[leozimmerman]

If you comment audioAnalyzer.exit() or remove audioAnalyzer funcs it works fine?
Which version of OF are you using?

[ImanolGo]

Good point! If I skip audioAnalyzer.exit() it doesn't crash.
I'm using OF 0.9.8

[ImanolGo]

Could it be the essentia::shutdown(), that creates the problem?

[leozimmerman]

If I had to guess, it seems that the audioAnalyzer.analyze() function is called once again after the analyzer has exit. It shouldn't because the soundStream is supposed to be stopped.
Does this happen with all examples?

[ImanolGo]

It only happens when I use the audio input.

What happens if you exit without deleting all algorithms and stopping essentia?

[leozimmerman]

It seems there's something wrong with the soundStream audioIn thread: Not really stopping.

There shouldn't be a problem since you´re closing the app.

The other workaround if to add some buffer check to the audioIn, something like:
if (inBuffer != NULL) {audioAnalyzer.analyze(inBuffer);}

[ImanolGo]

The compiler doesn't let me treat inBuffer or inBuffer.getBuffer() as a pointer. It says it is an invalid operand to binary expression..

[leozimmerman]

Oh, right, I would have to check to ofSoundBuffer reference. But could be something like inBuffer.size() != 0 or whatever function to check it its empty

[ImanolGo]

hmmmm...

I tried

if (&inBuffer != NULL) {audioAnalyzer.analyze(inBuffer);} and the compiler give me a warning that it might always be true. It still failed in the same place.

Unfortunately inBuffer.size() != 0 also had the same result.