tree 948b66abeafab5193d553a532b83128f65d1baf6
parent f8d6a1653476662a7b00a1564afe37516adeba1a
author Tom Finegan <tomfinegan@google.com> 1535170780 -0700
committer Tom Finegan <tomfinegan@google.com> 1535501209 +0000

Add obu_util and reorganize OBU support code.

Decoding and encoding apps need OBU parsing support for
several reasons. Chiefly among them is the need to parse
Sequence Headers in decoding and encoding apps for support
of reading and writing the AV1 configuration structure. In
order to facilitate this do the following:

- Move the bitreader and bitwriter buffer implementations
  to common targets built for decode and encode only
  configurations.
- Move the OBU reading utilities from obu.c and obu.h in
  av1/decoder to obu_util.c and obu_util.h in av1/common.
- Expose the currently required bitreader and bitwriter functions to
  apps in shared builds in all configurations.
- Ditto for aom_read_obu_header_and_size(), which now resides
  in obu_util.

BUG=aomedia:2027

Change-Id: I1109c634006e69925f1244fa09ce4d6db18a65cd