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This PR will...
Adds a configuration value to ignore devicePixelRatio in dimension calculations.
Why is this Pull Request needed?
Currently devicePixelRatio is always used in dimension calculation for stream choice by resolution. Dimensions set by a page developer for a video element, which may be chosen specifically for bandwidth limits, explicit quality limits, etc. will be silently adjusted without recourse, removing any control of stream choice from development time to environmental context instead.
This setting will allow those that need this explicit control to turn off devicePixelRatio adjustment for these calculations.
Are there any points in the code the reviewer needs to double check?
No
Resolves issues:
3647
Checklist