Unity cannot exit after use

[ZengRunMing]

Hello, I am playing Midi files on Unity using DryWetMidi version 7.0.1.

A problem occurred. When calling Application. Quit() or closing the Unity editor after playing the Midi file, the program cannot exit. The specific situation is that the task manager displays no response, and the program can be closed only after the task manager ends the task.

[melanchall]

Hi,

Please read this first – https://melanchall.github.io/drywetmidi/articles/dev/Support.html. At least, provide your code. How you setup a file's playback, how you dispose devices and playback and so on.

[ZengRunMing]

The core code is as follows (Github does not allow files with the suffix cs) MidiControl.txt

[melanchall]

1. Are you sure you properly dispose all the DryWetMIDI API when exiting Unity? Can you show where you call disposing methods?
2. What if you comment input device creation? Is Unity still hang on exit?
3. What if you comment playback creation? Is Unity still hang on exit?

[ZengRunMing]

The processing code is as follows MCL is MidiControl PB is Playback MDO is OutputDevice

private void OnApplicationQuit() { if (MCL != null && MCL[0] != null) { MCL[0].DisposeMidiOutDevice(PB, MDO); MCL[0].DisposeMidiInDevice(MDI); } MDO.Dispose(); PB.Dispose(); }

[melanchall]

• You've answered only one question from three.
• Looks like you haven't read the article I've mentioned above – https://melanchall.github.io/drywetmidi/articles/dev/Support.html. Here you can see point 7. It's pretty hard to read code without proper formatting.

In addition to two question you didn't provide answers on (I still need answers), I have a couple of new ones.

MCL is MidiControl MCL[0]

How you can use [0] on the MidiControl class? There is no an indexer within the class or you didn't show it. I see in your previously sent file and can't understand how you can use the [0] syntax on MidiControl. Maybe MCL is a collection of MidiControl instances? If yes, why MCL[0]? There is always only one item in the MCL? Where you dispose MCL[1], MCL[2] and so on?

Can you set breakpoint on OnApplicationQuit and confirm it's called before Unity hangs?

[ZengRunMing]

When I only use 'input and output', I can exit the program, but as long as I use 'playback', I cannot exit the program. MCL is a collection of MidiControl arrays, currently only MCL [0] is valid, and other array objects are not instantiated. I confirm that all object handling codes in the above code have been called before the program exits.

[melanchall]

Hmm, well, what if you change this code:

Playback playback = MF.GetPlayback();

to this one:

Playback playback = MF.GetPlayback(new PlaybackSettings
{
    ClockSettings = new MidiClockSettings
    {
        CreateTickGeneratorCallback = () => new RegularPrecisionTickGenerator()
    }
});

Does the Unity exit correctly now?

Also please say what version of Unity do you use?

[ZengRunMing]

Problem solved, Unity can exit now

The version used is 2023.3.171f1c1

[melanchall]

@ZengRunMing Can you please say, what helped? RegularPrecisionTickGenerator?

[ZengRunMing]

According to the code you provided, MidiControl has been modified and Unity can now exit normally

Playback playback = MF.GetPlayback(new PlaybackSettings
{
ClockSettings = new MidiClockSettings
{
CreateTickGeneratorCallback = () => new RegularPrecisionTickGenerator()
}
});