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

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

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

Adding the missed include file.

Change-Id: I7e48df6b0633afbebaf1ccb3062ae404e7203dc9

This commit takes out the if statements on using adaptive motion
search flag. This feature is automatically enabled in non-RD mode
decision flow for variable partition types search.

Change-Id: I5a25cf9109d84d07aa61b3e02c8d32dda1e90cb0

This patch fixed WebRTC Issue 3020: "Uninit error at
vp8_mbpost_proc_down_xmm". The first 8 values in d were not initialized,
but was accessed. This patch fixed c code as well as mmx and sse2 code.

Change-Id: Iaa5b41a4ed3bea971b15fb826ce34b7ab4e36fb1

This commit enables a recursive partition type search for non-RD
mode decisions. It allows the encoder to choose variable block
sizes in a 64x64 block based on rate-distortion modeling.

It improves speed -6 coding efficiency for rtc set by 2.4%. Most
of the gains come from 32-40dB range, where many sequences gain
about 5% to 20%. Local tests suggest there is no speed change.

Change-Id: I06300016e500a21652812b7b3b081db39a783d66

Change-Id: I50db8d3c99eea39e46cc5876cb1f49513c084073

Change-Id: Ie624a119ce8e0891f4ca396040d679e22ef8ce27

This is to silent a number misalignment warning reported by valgrind.

Change-Id: Ia47a06010b28d7a88dde21f3e4ccb9308fc6f8cf

Change-Id: I47a8b4bf9a6cc0063d1a6785eaaad641d0659e24

Change-Id: I288e5ffade508fc3c803986d47ccf06df8d784dd

Change-Id: I49b0937a8dd3520f20435a4817a408a094ab1679

Change-Id: I12c29a630da1fbc5508f11b61d182f9b527b3a35

Change-Id: I8d02cdb5e7fef02b8c95413dfd239fa51a8c7777

Change-Id: I398decf319c8f4d1b3abe1f276e009840e61b684

Change-Id: I7872b726511887494107466a946e2b34e3d74045