(This is a merge of http://go/wvgerrit/95003.)
To reduce the number of OEMCrypto calls on the decrypt path, the maximum
subsample size will now be cached after the first call to retrieve it.
Bug: 150018606
Test: Android Unit Tests
Test: CE CDM Unit Tests
Test: ExoPlayer high-bitrate playback on OEC v15
Change-Id: I0b5d38d8a082c0a127d2a47f112b76c64085bddb
(This is a merge of http://go/wvgerrit/94928.)
In OEMCrypto v16, we dropped support for 'cens' and 'cbc1'. However, we
did not redefine the pattern (0,0) to be a valid pattern for 'cbcs', even
though it was no longer being used to signal 'cbc1'. Instead, we made
the CDM reject CTR with a pattern ('cens') and CBC with a (0,0) pattern
('cbc1') to mirror the behavior of OEMCrypto v16.
However, some apps have been using 'cbc1' mode to decrypt audio in
'cbcs' content. This is normally not possible but is possible for a
subset of content. Furthermore, it is easy to do by accident because of
the way most packagers package 'cbcs' audio and the special significance
Widevine has historically given the (0,0) pattern.
This patch updates the CDM to not reject CBC with a (0,0) pattern but
instead treat it as 'cbcs' content. To decrypt it correctly, the pattern
is treated specially inside the CDM core and converted to the
recommended equivalent pattern — (10,0) — before passing the content to
OEMCrypto.
For more specifics, please see the design doc: http://go/vclfg
Bug: 150219982
Test: ExoPlayer Demo App 'cbcs' Content
Test: GTS 'cbcs' Content
Change-Id: I334ff15db5f7b7d62040a036ba6d17515c3caee4
am skip reason: Change-Id Iaf9da3f0c88889525f73f3153a5977c8416286bb with SHA-1 fb5c67929f is in history
Change-Id: Ia190afdb3140f4da1cc22d47c791acde58ae594b
am skip reason: Change-Id Iaf9da3f0c88889525f73f3153a5977c8416286bb with SHA-1 fb5c67929f is in history
Change-Id: Ie2f966d18d1e64a8ec210b6c4516622c830d6a85
am skip reason: Change-Id Iaf9da3f0c88889525f73f3153a5977c8416286bb with SHA-1 d9c703ef9e is in history
Change-Id: Ib20928c1ff9ccf3475a362df9bdc8d5b284f0901
am skip reason: Change-Id Iaf9da3f0c88889525f73f3153a5977c8416286bb with SHA-1 fb5c67929f is in history
Change-Id: If96bace3b5af83e8fbe534682e29cb352da98b8c
am skip reason: Change-Id Iaf9da3f0c88889525f73f3153a5977c8416286bb with SHA-1 fb5c67929f is in history
Change-Id: I21c1e3c9e82d4de4cdeb599ba597bbad759218dd
[ Merge of http://go/wvgerrit/94483 ]
With OEMCrypto V16 comes a new potential error code from calls to
DecryptCENC(). WARNING_MIXED_OUTPUT_PROTECTION may be returned by
supporting devices if one of the output devices does not meet the
required HDCP level for the decryption key/license; however the output
is instead restricted (by OEMCrypto) to devices that are secure. This
warning is informative to the CDM; but no action can/should be taken
by the CDM.
In addition, if DecryptCENC() returns an error/warning, it is likely
that the same status code will be returned on subsequent calls to
decrypt within the same crypto session. To reduce the number of logs
the CDM produces within the same crypto session only changes in error
codes are logged.
Bug: 140825538
Change-Id: Iaf9da3f0c88889525f73f3153a5977c8416286bb
(cherry picked from commit d9c703ef9e)
Merged-In: Iaf9da3f0c88889525f73f3153a5977c8416286bb
[ Merge of http://go/wvgerrit/94903 ]
Prefixes are no longer needed now that file and line number are
being logged.
Bug: 149829271
Test: wv unit/integration tests
Change-Id: I0ba701fc262cdb59056dca139c38ed76035bcbb8
