Panic with wav files

[qarmin]

Panic with wav files

[qarmin]

In my app I have option to find broken files, so users can find really strange files that crashes this library in many ways, so I try to find the files myself.

This files were found by fuzzer, so music inside probably is broken.

[dedobbin]

Hey! I'm kinda looking into this.
It should definitely not crash, but when i play these files in audacity it also doesn't sound quite uh.. healthy.
Is there any context to these files? Is that the sound it's supposed to make ?

[dedobbin]

From what i've seen while playing around, it plays some samples correct, but eventually reads an invalid value, which should be the key for the step table in symphonia-codec-adpcm/src/codec_ima.rs

I traced the code, to see if anything is off spec for ADPCM decoding. I found some leads but nothing definite.

[dedobbin]

After discussing my findings with @pdeljanov a solution was found. Other applications seem to drop the data when such an impossible entry is found.

I can pick this up and implement this for this specific format as well.