Adjustments take heavier account of the frame near a kf
in deciding boost and limit the total number that can contribute.
Also adjusted the minq calculations such that in most cases we
generate a smaller key frame.
Modified the code that accounts for how static the sequence is and
added some adjustment based on image size. This is still very
crude but smaller images tend to behave better with a larger
delta between KF Q and other frames than larger image formats.
Changes give sizable gains in overall PSNR  on all the test sets but the
biggest gains (~3%) were on the std-hd set.
The gains were smaller for SSIM but still significant.
Average PSNR results are mixed because this metric can very easily
be altered by having a very good / lossless coding of one or two frames.
Some of the YT and YT-HD clips in particular have blank lead ins and
allowing lossless coding of these appears to make a big difference to
average PSNR but it reality does not help much at all.

Change-Id: I6bfe485a1d330b47c783832f1717c95c535464ec

Change-Id: I83aa188d414922db19cccb210c4001c02d5a404c

Removed skip_recon_sb(). Cleanup code so that we could combine
decode_sb and decode_mb later.

Change-Id: I24d1dd5283e2565072838a03c344938b88bfd35c

Change-Id: I655305c9e22bdd9abc893d3c40d4bc6616aa1d35

Change-Id: Id268ccaf1aefee6a3ed3e31486d4370f1c25e8cb

alt_extra_bits is now only used in a local context so
remove it from the twopass_rc structure.

Change-Id: I5bbf0a3dba9712a3da45760f7bb865243705b53e

that are related to using reconstructed pixel for selecting reference
motion vectors.

Change-Id: I048dfae39ca7385e344b57d46347ecc6e753e1bb

It is unused.

Change-Id: Ied3269ffacf9b6303bc9d85f996384c3575ef812

Change-Id: Idb0d11e3ae9afabe667a9f327bf4d3aa84f63649

Using filter_level/16 instead.

Change-Id: I73a7e83a785d6aa6f9b5d22cf66e22f0a39ed078

About 11% overall encoder speedup with the sbsegment experiment enabled.

Change-Id: Iffb1bdba6932d9f11a6c791cda8697ccf9327183

Change-Id: I41b3f5932ecd6256e8207369ad19aa81e7987be1

Adds RD integration for 32x16, 16x32, 64x32 and 32x64 rectangular blocks.
Derf almost +0.6%, HD a little over +1.0%, STDHD +1.3%.

Change-Id: Id651fdb6a655fdbb5c47009757e63317acfb88a5

Enable recursive partition information coding from SB64X64 down to
MB16X16. The bit-stream syntax is now supporting rectangular block
sizes. It starts from SB64X64 and recursively describes the partition
type of the current block. If the partition type is PARTITION_NONE,
the block is coded as a single unit; if it is PARTITION_HORZ or
PARTITION_VERT, the block is segmented into two independently coded
rectangular units, with no further partition needed; otherwise, the
block is segmented into 4 square blocks. i.e., PARTITION_SPLIT case,
each can be potentially further partitioned.

Forward adaptive probability modeling is used for the partition
information coding, conditioned on the current block size.

Change-Id: I499365fb547839d555498e3bcc0387d8a3587d87

Also a little bit of code cleanup: replacing pbi->common with cm,
pbi->mb with xd.

Change-Id: I2f70a005704a2833d644dfaafc4cd354e6e8532b

Merge "Slightly hackish workaround to support rectangles in directional intra predictors." into experimental

Change-Id: I7057ed8e2a13a3c5367e2923eb4b3260bd7cf546

Change-Id: Ic795cf6fc202bf32c9b5b0b3cef9ac422af53cd0

Scalar path is about 1.3x faster (2.1% overall encoder speedup).
SSE2 path is about 5.0x faster (8.4% overall encoder speedup).

Change-Id: I360d167b5ad6f387bba00406129323e2fe6e7dda

This function is now called from configures the ARNR
filter so it belongs with the other temporal filter
functions.

Change-Id: I64211875918364b5b8edfb97743e573c6def1663

Normalization of the frame boost value was being done
when it reached the value 1028. The intention was to
keep to a range of 10 bits, so it should have been
clipped above 1023.

Change-Id: I0afdddc1d2eb9e7822ec4578903cbe6ec0b33b91

Change-Id: I8a4da6925f2d58a426c4d122df8b97bb69452e49