Support GPU format/colourspace conversion #11337
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Description
Extends GPU scaling to also handle colourspace or format conversions to enable shared-texture encoding with heterogenous output formats.
Note: Includes #11336
Motivation and Context
#11336 falls back to shared memory encoders, which are less efficient, this aims to fix that by extending the conversion capabilities.
In theory this would also allow recording HDR locally and streaming SDR, among other use cases that people might have.
Will need some additional discussion related to function naming and implemenation of the new texture availability check.
How Has This Been Tested?
Streamed to Twitch while recording 444 locally as well as streaming SDR while recording HDR locally.
Also currently only fully implemented for NVENC, will need AMFQSV as well.
Types of changes
Checklist: