qtdemux: No need for new "application/x-cbcs" caps
Instead of using the new "application/x-cbcs" caps, we are just adding a new structure field "cipher-mode" to indicate which encryption mode is used: "CTR", "CBCS" or "CBC1".
Similarly for the protection metadata, we add the "cipher-mode" field to specify the encryption mode with which the buffers are encrypted.
Edited by Yacine Bandou