This fixes some problems in splitmv-related bitstream parsing in the
sb8x8 experiment.

Change-Id: Id168f9ec9c88626877d8f536e6f394b6f4f782e4

Don't allow i4x4 except for sb8x8 recursion step. Read only 4 (not 16)
i4x4 submodes if we are i4x4.

Change-Id: Iaaaced1a134006b2c96eed66f014300eae41e0ed

Fixes mismatch in keyframes with sb8x8 experiment enabled.

Change-Id: Id44c25e1cd32be5c6543ed8cd840a5b0c8e726f1

Change-Id: I5a886a6fa19086629a274f9ada7a862fd0ddf62f

This doesn't affect the output, because in previous cases where the
values were uninitialized, this was because the mb_row/col is outside
the codable area, and thus encode_sb will test them for the next
decomposition-level, but return right after that on size-check. All
this does is prevent a warning in valgrind.

Change-Id: I90d8a29e6f8ebb2b0143684e08fe77ae3a0816b1

Fixes valgrind uninitialized value use warnings.

Change-Id: Ie9314d684e2ad194f8aca5bde1729fb9b7c0221d

Change-Id: I83677227f7610fdf2db9f15f87fecd4d8e072427

Fix the issue that causes array bound excess in getting partition
context.

Change-Id: I66166f047f0bcaefebb0bcf441c5b1f777d8da44

The encoder reconstruction is now correct. Decoder to follow shortly.

Change-Id: Iedf98cdaebb4ca1256c7714cad7024a75853ad6a

Change-Id: I7ac69a369851b09d9422f2e3c62b12b3fcd49a4c

Change-Id: I07aa89a67e0ac5f99ef0c448553dbc46b0ed27f2

Fix bugs occur in contextual partition probability update, when
sb8x8 is enabled.

Change-Id: I19e2cec8a54c2dafd2be2803bbfde7337a2ae45f

Change-Id: I390bb1cedc835f439fd5dd6cda6572b29cbb139c

This commit enables bit-stream writing and reading for recursive
partition down to block 8x8.

Change-Id: I163cd48d191cc94ead49cbb7fc91374f6bf204e2

Unify the various vp9_optimize_sb functions into one that handles all
transform sizes.

Change-Id: I48b642fbfb3e72cc2e0bcf1d0317a80a80547882

The decode_mb only carries I8X8_PRED decoding, which will be covered
by the regular MB intra modes when SB8X8 is on. To be removed later.

Change-Id: I3b9ee55917a30b42518b81987bc10c22b1a19e7f

Files were copied from vp8 and never maintained.

Change-Id: I9659a8755985da73e8c19c3c984423b6666d8871

Change-Id: If02e006aa8a89da9de23da92362bd2e7718ea07c

Work-in-progress, not yet ready for review. TODO items:
- bitstream writing (encoder) and reading (decoder)
- decoder reconstruction

Change-Id: I5afb7284e7e0480847b47cd0097cb469433c9081