> On Jun 9, 2014, at 3:56 PM, Brendan Long <s...@brendanlong.com> wrote: > > I'm looking into EME and something I've been asked to investigate is > Microsoft's proposed CDMi interface, and if we could use it in WebKit. The > idea is that we would expose a few common interfaces (see page 12 of the PDF > at that link), like "Cdm_MediaKeys(wchar_t *keySystem)" constructor, > "createSession(wchar_t* type, const unsigned char *initData, const unsigned > char *AppData)" to create a CDM session, etc. The advantage of this would be > that we could create CDMs for each platform and then re-use them in multiple > browsers. > > Is there any interest in this in WebKit? I'm starting to look through the > code to see how it could be done (presumably implement CDMPrivate / > CDMPrivateInterface to use CDMs matching this interface), but I figured I'd > go to the source and see if anyone has looked into doing this before.
I haven’t seen this document before, but after a brief look it seems that implementing a new CDMPrivate and CDMSession would be the best way to add support for this CDMi interface. It does look like the CDMi module implements a lot of the platform-independant parts of the EME spec (whereas CDMPrivate and CDMSession are the platform-specific parts), so there may be some redundant logic. And we may need to expose some new methods from CDMSession -> MediaKeySession, e.g. to change the MediaKeySession’s readyState. Apart from that, this looks doable. -Jer > Thanks, > Brendan Long > CableLabs, Inc. > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > https://lists.webkit.org/mailman/listinfo/webkit-dev
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