Custom and extending CDM to support other DRM systems

All,

I am currently looking after the information on how to extend the CDM to
support other DRM systems, which is nowadays fixed and hardcoded for
each browsers (IE with PlayReady, Chrome with Widevine, Safari with
FairPlay). It would be nice to ensure the EME spec does provide
information and also how browsers would support that in an agnostic
manner to ensure a non fragmented market where the user does want to
play a protected video content whatever the browser he is using.

Thanks in advance for any information and help you may provide.

Best regards,
-- 
Emmanuel Poitier- Chief Executive Officer (CEO)
Enman

Telephone:+33 (0)2 54 67 15 38 
 Mobile:+33 (0)780 381 124
Email:emmanuel.poitier@enman.fr  
 Web site:http://enman.fr