Renamed EncryptionKeySource and WidevineEncryptionKeySource to KeySource and
WidevineKeySource respectively.
Replaced Initialize method with FetchKeys.
Added unit tests.
content_id parameter is now binary. Specified in command line with hex string.
Change-Id: I8010ca62d036cefb3a7c105e0eefee25bbf06d61
This is to workaround a Chrome limitation that CDM must be initialized
before starting the playback. CDM can only be initialized with a valid
'pssh'.
Change-Id: Ia34e90dac42abbcdf0193fe4e3c971c87debdd42
Extract encryption related handlings from Fragmenter and move into new
class EncrpytingFragmenter.
Change-Id: Id42493cd321fd7e306f8ce522c7ff04990965256