623920d83f
During session sharing, when a sample contains both clear and encrypted subsamples, subsample flags would on occasion be set incorrectly. Clear subsamples would be sent to the current session, while encrypted ones would incur a key id to session lookup and be sent to the appropriate session. The sessions would then receive decrypt calls with subsample flags incorrectly set. In order for this to work correctly all subsamples within a sample need to be sent to the same session. This requires that key ids be specified and checked if at least one of the subsamples is encrypted. If however none of the subsamples are encrypted then a valid key id may not have been provided to MediaCrypto, and the subsamples may be sent to any session. In order to support this, the CDM decrypt will now allow the caller to specify whether to validate the key Id. Then a check is added to wvcrypto determine whether to ask the CDM to validate the key ID based on the clear/encrypted states of the subsamples. The list of subsamples is already being preprocessed, so this additional check just determines if any subsamples are encrypted, and sets the validation flag appropriately. b/11967440 Merge of https://widevine-internal-review.googlesource.com/#/c/8510/3 and https://widevine-internal-review.googlesource.com/#/c/8520/2 from the widevine cdm repo. Change-Id: If65c36a31e56b69f514f0cc547a0becf0c54c40a