Map EXT-X-SESSION-KEY to Variant KEY tags by URI #4927
Description
Is your feature request related to a problem? Please describe.
Add support for EXT-X-SESSION-KEY tags in Multi-Variant Playlists.
Describe the solution you'd like
- Use session keys to begin key selection and key-system access prior to level loading (added in Multi-DRM Support #4930)
- Key-loader and EME-controller provide some level of mapping between session-keys and level-keys to avoid duplication or parsing of the same keys based on key URI
Additional context
See EXT-X-SESSION-KEY under https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis#section-4.4.6.5
- Relates to HDCP-LEVEL capping and EME error handling #4923
- Relates to ALLOWED-CPC Support #4928