Can we customize ExoPlayer ABR to prioritize tracks by custom criteria instead of bitrate

[AndyWangLYN]

How can I customize ExoPlayer's AdaptiveTrackSelection to prioritize specific tracks based on custom criteria (e.g., quality score,
metadata) rather than solely relying on bitrate ranking? I want certain lower-bitrate tracks to be selected ahead of higher-bitrate ones when they meet my custom criteria.

I also tried to raise a PR: #3068 to allow customized tracks sorting as an option. Not sure if this is gonna fit it into the bigger system. Would like to get some thoughts and suggestions. Thanks!

[AndyWangLYN]

Essentially, I want to change determineIdealSelectedIndex() function return value (indicating the best track, which I believe currently only select the highest bitrate track that is under available bandwidth). I wonder if customization can be added here. Which is my intention for the PR #3068

[tonihei]

Thanks for filing it as an issue as well. The new implementation idea of having a customization hook for the "quality sorting" sounds like a good approach to me and is a nice generalization of the algorithm. I'll keep the detailed discussion about the implementation in the PR.