If a key status is 'output-restricted', treat the key as unusable.
In many cases it is, and we have no way of differentiating when it is
or is not. So our treatment of this status should be conservative,
and we should treat the key as unusable. This will prevent
HDCP-related failures that may be caused by adapting to a stream whose
output restrictions may not be met. The hasOutputRestrictions flag on
streams and tracks is now gone.
The caveat to this change is that if content is encoded with the same
key for SD and HD, and HD streams have HDCP restrictions that cannot
be met, we will now consider both the SD and HD streams to be
unplayable, even though we could still play the SD streams. Because
we can't separate the status of the two streams, we don't know for
sure if the SD streams can be played.
We will no longer support such content due to the complexity of doing
so, and due to the risk of playback failures on adaptation to
restricted streams. Streams with different security requirements
should always be encrypted with different keys. Content which does
not follow this best practice will no longer be playable in Shaka
without modifying the player.
Change-Id: Ia29db8efa0b6f83c0376199dea5210c9b468bc40
Added new offline_utils.js to hold utility methods for offline
support. This also removes a circular dependency between
Storage and DownloadManager.
Closes#431
Change-Id: I98842c63c7ba57d4d02d7fe6bace57227982317c
Joey Parrish
Jacob Trimble