This commit compares the current original frame to the previous
original frame at 64x64 block level and decides if the entire
block belongs to background area. If it is in the background area,
skip non-RD partition search and copy the partition types of the
collocated block in the previous frame.

For vidyo1 in the rtc set, this makes the speed -5 coding speed
about 8% faster. The overall compression performance is down by
1.37% for rtc set.

Change-Id: Iccf920562fcc88f21d377fb6a44c547c8689b7ea

Delete code relating to the old VP8_TUNE_SSIM flag
as this code does not currently work and is largely made
redundant in VP9 by the various AQ modes.

Change-Id: I71f28e1f680573d296422254489000678552b17b

Change-Id: Ib8c1b3b0a5a5689d3261dc822a69e9d473b89be1

Change-Id: Id156af5662ebe6fbe1cab636564f5f4bedb85ab0

Change-Id: Id687aa617650a859463e7ae63dd4c0dc4f3e4779

Change-Id: I6ea1c335da9ca5b65f6a11466b417ad196fd0d65

Change-Id: I258351fc1fff70ff2e9fa4845e575b0bb6a423d1

With a more approriate one vp9_setup_src_planes() as only src buffer
pointers need to be initialized here.

Change-Id: I40fac4d8b2d39eb7d0c65b9b6afab45138a13936

Change-Id: I2d1b5c1481aefe226082e1f096ca9edd340d4d31

Minor change to use matching type in comparison.

Change-Id: I670cae2d584918c67c1af791a797629f392f599e

This reverts commit 22a3e307

Change-Id: I460d905edf5fb2006da58c18fbe02c04d0c631bb

Change-Id: I51c71dd4aee6592fb90feebcf864bccc87dacec6

Cleanup.

Change-Id: I54d989e24b35323cda7290654e425565d5c9ea2d

Change-Id: I9b8f9a3f4fa9d48695149dd68ecb5e8d84accafe

Change-Id: Icbfeb04647d654253866d290abd4775a877b4f61

Calculate the difference variance between last source frame and
current source frame. The variance is calculated at 16x16 block
level. The variances are compared to several thresholds to decide
final partition sizes.

An adaptive strategy is implemented to decide using
SOURCE_VAR_BASED_PARTITION or FIXED_PARTITION based on motions
in the video. The switching test is done once every
search_type_check_frequency frames.

The selection of source_var_thresh needs to be investigated
further later.

RTC set Borg test showed 0.424% overall psnr gain, and 0.357%
ssim gain. For clips with large enough static area, the
encoding speedup is around 2% to 15%.

Change-Id: Id7d268f1d8cbca7fb8026aa4a53b3c77459dc156

This commit allows the non-RD mode decision flow to  select
prediction filter type in NEWMV mode. It provides 8.14% compression
performance gains in both settings of AQ=0 and 3. The current speed
impact is about 5% to 10% slower.

Change-Id: Id66ecebf77abd8f90fb3f6a066c0e8dfb4bf1c42

Change-Id: Iad4002d7aecaae0e25d88e286bacde7e6cd7264f

Change-Id: I9c5f7edc2d5d1ec5aee396b87bdfc99ee21c435a

Copy up to a certain bsize, otherwise set to a fixed bsize.
This helsp to reduce artifact near moving boundary caused by full partition
copy without checking motion of super-block.
This artifact can occur at speeds 3,4 in real-time mode.
Issue: https://code.google.com/p/webm/issues/detail?id=738.

Change-Id: I05812521fd38816a467f72eb6a951cae4c227931

Change-Id: Ie364fe837002de96923da2c1c0ff8bb4b8d469a7

Now interp_kernel is obtained when it is really required (based on
mbmi->interp_filter value).

Change-Id: I4c7a93c179d1045eba16e7526c293d02c9b8b47e

This was broken by change
Icc4b66f3935fad5ec4516a4d57e843d12c365e64

Change-Id: I49e3fc525664eb7a433f55f76b8f8628fe251eab

Change-Id: I87b0668e23c54429a06bba85437606c4780be9ba

Turns off the DISABLE_RC_LONG_TERM_MEM macro and makes other changes
in the way the bits are updated, to make 2-pass rate control track
target bitrates closer.

Change-Id: I5f3be4b11c2908e6a9a9a1dd4fcf4e65531c44d8

Change-Id: I4341d16ef83acd1cc9e55f7c5eff4af921bf57d4

Renames:
  mi_8x8 -> mi
  mode_info_stride -> mi_stride

Change-Id: I66f3e5fd1e7b7f46f108af5bb711c5fd9493c1be

Change-Id: Ie2ea9dd8bd338cc9fe12ca9033df64f7644c68b3

This fixes active map for non-rd realtime speeds.

Change-Id: I1bf416de3f7ef2e5dd2eabde052cce3c0683a52c

This commit optimizes the bit allocation for the non-RD coding flow.
It applies slightly better quantizer to the frames, where all blocks
run a non-RD partition search. Such frames typically have better
rate-distortion trade off, thus improving the reconstruction quality
for next few frames reference at reasonably low increment in rate
cost.

The coding performance for rtc set at speed -5 with error-resilient
tuned on and rate control set as cbr is improved by 19.58%. It improved
the coding speed by about 10% for a portion of local test clips.

Change-Id: I9d56696cd4359dc8136ca10aff10fff05aaa2686

Properly obtain and buffer the segment_id in non-RD mode information
update process.

Change-Id: I43230001872f6a986d12c0d94e98fdec0db3be2c

Change-Id: Iffa45b9b04196c1ded6037622a8644a2500a62de

This commit enables the non-RD mode decision coding flow to
adaptively apply partition search in non-refresh frame, when the
collocated block in previous frame suggests there might be a motion
activity. It refactors the update_state_rt() function to support
buffer swap of mode_info struct, thereby unifying the encoding
stage across various non-RD coding modes.

It provides 5% compression performance gains in speed -6 for rtc
test set, at about 12% speed slow down.

Change-Id: Iefa374aed5a11c4b7ff9a3ed36a98ea8bd184edb

Change-Id: I32695ad703dcbbbbf5f122b403f3d3120a0be366

Change-Id: I32beb5f18c10b5771146c55933b5555487f53633

Fix so that vp9_update_segment_aq() will use the correct (i..e, chosen)
encoding mode (from ctx struct) in update_state.

Change-Id: Icc4b66f3935fad5ec4516a4d57e843d12c365e64

This commit allows the recursive non-RD partition search to early
terminate sub search tree when the cumulative rate-distortion is
already above the best available.

Change-Id: Ifdbcbb4bee229f47fde3033200829577c9f1fc1d

This commit added a speed feature to make the logic of calculating
skip_recode on a block level more explicit. This also enable the
feature to be enabled at speed 5 where the previous logic is too
conservative, help gain back the lost speed for --rt(-5).

Change-Id: Ieb37ca3e85c2e7bda343486edf13d5f5395f2233

Change-Id: I713af99d1e17e05a20eab20df51d74ebfd1a68d2

There were a few conflicts between the new non-RD partition search
and recent clean-up patches, which were not caught by git control.
This commit fixed these issues.

Change-Id: Ieebefbd6c19d81d0d13e3c568877d5cce2ab7797