Keyframes don't set this variable, so it would use the last set
values from inter frames.

Change-Id: Ie1ef45ece2c44b21b5d55f6cea9f7d6e7a445692

With this, the RD loop properly supports rectangular blocks.

Change-Id: Iece79048fb4e84741ee1ada982da129a7bf00470

Static threshold results slightly up (+0.1% on derf), probably b/c
we now take the filter (sharp/lowpass) into account for the breakout
decision.

Change-Id: I9f597601da434205142afd05f32690e7ba8fd690

Change-Id: I697514efd6024e1b4153bbde58ae5e323b030981

Change-Id: I1f2dbf04a0140a7cc2060b0a9efb4ed8e5270d3d

This is work-in-progress, it implements multiple ARF
encoding behind an experimental flag.

It adds the ability to insert multiple ARF frames into a
single ARF group. This patch implements the reordering
of the coded frames, and implements a fixed-length coding
pattern. It applies a fixed quantizer strategy based on
where the frame is in the coding sequence.

Further work to modify the rate control strategy is
ongoing and will be submitted via a set of future patches.

In this first step, each ARF group is recursively
bisected and an ARF frame added at that position in the
sequence. The recursion continues until ARF frames are
within MIN_GF_INTERVAL frames.

The code sits behind the "multiple-arf" experimental
flag ("CONFIG_MULTIPLE_ARF"). The experimental flag
"oneshotq" ("CONFIG_ONESHOTQ") also needs to be enabled
for this patch to work correctly.

Change-Id: Ie473b05ebb43ac473c0cfb659b2b8042823085e2

Removing redundant code.

Change-Id: I71bfc40a1fb06d8e3149ed5400aa4dfd87a51aac

Change-Id: I7d3b2ef26aba3dfb1d5c83309aab2024e04ee819

Combine superblock inter predictors into a unified function that
allows configurable block width and height. The inter predictions
of block sizes smaller than 16x16 are handled differently. To be
continued on merging them later.

Change-Id: I14075959dd5e221f00c205c99ca35c1c31ef728e

Change-Id: I8fff2216c169c872f7073e66357e400f78a3445d

* changes:
  Move prediction hit counting to update_state().
  Merge loop over all macroblock modes into encode_sb_row().

To match the order of  directional intra prediction modes for larger
blocks, also renamed the i4x4 prediction modes to mirror the larger
variants.

Change-Id: I77cea4d0add6c7758460bf9c7a2fe59aca601f0b

So it is consistent with I8x8_PRED.

Change-Id: Iefa65124b2419690d83e526c611129c0ede29d11

The probabilities derived from these statistics are used in bitstream
writing; therefore, we should only do this when we actually decide to
use macroblock coding (over superblock coding). Derf gains +0.15%.

Change-Id: I196814c070a7c79889590658ce10a6eb07454389

The build predictors now output directly to the dest.  These
copies are no longer required.

Change-Id: I8e91eda6b49993e6c16cfadc705d82a7e80f19b2

The intra predictor supports configurable block sizes. It can handle
intra prediction down to 4x4 sizes, when enabled in BLOCK_SIZE_TYPE.

Change-Id: I7399ec2512393aa98aadda9813ca0c83e19af854

Rename pick_mb_modes to pick_mb_mode, since it now handles only a
single macroblock. This is consistent with pick_sb_mode handling a
single non-macroblock.

Change-Id: I896fdfa06436b2d8c24d6474718cc74420df6b3b

Change-Id: I9951a06dbe4514cc1cf69ff4349c4e12cb4a318c

This patch changes the default with the modecoefprob expt
to use mode-based forward updates with one-node pegged
modeling.

The maximum difference with fully trained tables is now
less that 0.1%.

Change-Id: I06b44322e10c6703f93f3c1d48d973b1136a0618