Fix for Intermittent Crashes When Using get_av_audio_buffer_list

[solaoi]

Description

We've identified and addressed an intermittent crash issue specifically occurring when using the get_av_audio_buffer_list method in the screencapturekit-rs library. The crashes were observed under certain conditions, not consistently reproducible, making them hard to pinpoint.

Detailed Change

The proposed fix involves modifying the get_av_audio_buffer_list method to enhance error handling and validation processes. A crucial part of the change is detailed in this commit, where we shifted the return type to Result<Vec<CopiedAudioBuffer>, &'static str> to allow for graceful error handling of potential null pointers and invalid buffer references, thus preventing unexpected thread termination. This approach has effectively eliminated the crashes in our testing environments.

Request for Feedback

We seek feedback on this change, especially regarding:

• Similar issues encountered with thread stability or with the get_av_audio_buffer_list method.
• Potential unintended side effects of the proposed change.
• Suggestions for more comprehensive solutions or improvements to the proposed fix.

Next Steps

Pending community feedback and maintainer approval, I am prepared to submit a pull request incorporating this change for further review and potential integration. These modifications have been tested and verified to prevent the specific crashes related to the use of get_av_audio_buffer_list.

Your feedback and suggestions are highly appreciated. I look forward to collaborating on enhancing the stability of screencapturekit-rs.

Thank you for considering this issue.