* commit 'ce5870a3a8f2b10668ee4f04c2ae0287f66f31b2':
cbs: Refcount all the things!
Some changes for bitstream API.
Merged-by: Mark Thompson <sw@jkqxz.net>
This makes it easier for users of the CBS API to get alloc/free right -
all subelements use the buffer API so that it's clear how to free them.
It also allows eliding some redundant copies: the packet -> fragment copy
disappears after this change if the input packet is refcounted, and more
codec-specific cases are now possible (but not included in this patch).
(cherry picked from commit 867381b8b51fa21fa2b8f071f508f3d39cc9c1f0)
(cherry picked from commit f763489364416bb6866adc4f4a96012dd2ca1bd0)
(cherry picked from commit 067a9ddeb8feff1f724856f0054930c55219f76b)
