Description

This PR contains some miscellaneous prep work for HDR support. The main changes are:

• Plumbing the video::config_t into the display implementations to allow them to tell HDR and SDR streams apart
• Call IDXGIFactory1::IsCurrent() each frame to tell if there has been a GPU or display change. Microsoft recommends this method of detection. It is required to accurately detect HDR transitions.
• Implement display_t functions to return HDR state and HDR metadata
• Configure the encoder for SMPTE ST 2084 PQ and Rec 2020 when in HDR mode
• Send the HDR mode message to Moonlight when HDR state changes

Note: This is only prep work. HDR will not work properly with these changes alone.

Screenshot

Issues Fixed or Closed

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

Branch Updates

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must be updated before it can be merged. You must also
Allow edits from maintainers.

• I want maintainers to keep my branch updated