Merge from Widevine repo of http://go/wvgerrit/18603
This is the documentation changes for OEMCrypto v12. This
includes Provisioning 3.0 changes.
Comments can be put in the original Google docs:
http://go/oemcrypto WV Modular DRM Security Integration Guide for
Common Encryption (CENC)
http://go/wvdelta12
WV Modular DRM Version 12 Delta
The following features and changes are documented, but not
implemented:
b/28887904 Buffer Size Unit Tests
b/28294273 All OEMCrypto functions should return same error code
when key expires
b/24469550 Enforce Maximum 16 Byte Key ID Length
b/30140448 Minimum 16 keys per OEMCrypto_Session
b/28316108 Feature Request Key Control Block "No Digital Output"
b/8608578 OEMCrypto_RefreshKeys should not alter key control
setting except duration
b/30120064 Add OEMCrypto Unit Test for non-paired subsamples
(for VP9)
b/30141311 Sample OEM Certificate Needed
b/31381719 Divide Samples into Subsamples of at most 100k bytes
Change-Id: Ibf03b55cda822a676cd174ddc292bb35177cddbe
