Intent to ship: MediaKeys::getStatusForPolicy() on Firefox 128

[Alastor Wu]

Hello,

I intend to turn ON the preference media.eme.hdcp-policy-check.enabled by default for all platforms on Firefox 128, which will allow web developers to use MediaKeys::getStatusForPolicy() function to query the HDCP status.

Summary: MediaKeys::getStatusForPolicy() is a function used to check the HDCP status on devices.

Bug for Feature Implementation: https://bugzilla.mozilla.org/show_bug.cgi?id=1404230

Bug to turn on by default:  https://bugzilla.mozilla.org/show_bug.cgi?id=1878714

Standard: https://w3c.github.io/encrypted-media/#dom-mediakeys-getstatusforpolicy

Platform Coverage: Available on all platforms.

Preference: media.eme.hdcp-policy-check.enabled

Other Browsers: Chromium has shipped this feature a long time ago. https://caniuse.com/?search=getStatusForPolicy

Web-platform-tests: https://wpt.fyi/results/encrypted-media?label=master&label=experimental&aligned&q=check-status-for-hdcp

[Tom Ritter]

The spec references the below registry which "provides the mapping
from minHdcpVersion values to HDCP specifications." - but it's a 404

[EME-HDCP-VERSION-REGISTRY] Encrypted Media Extensions HDCP Version
Registry. Joey Parrish; Greg Freedman. W3C. 27 April 2024. W3C Working
Group Note. URL: https://www.w3.org/TR/eme-hdcp-version-registry/

-tom

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