In model_rd_for_sb function, the spatial domain SSE and variance
are checked to see if transform coefficients are quantized to 0.
Besides that, this patch adds another set of thresholds that are
much more strict. These thresholds are used to conduct a partition
block level check to measure if all its TX blocks are skippable
for YUV planes. If it is true, x->skip is set for this partition
block, and thus its mode search is terminated.

This speeds up the encoding at very low prediction error case,
such as screen sharing application. This patch covers what
rd_encode_breakout_test() does, so that function is removed.

Borg test at speed 3 shows:
For stdhd set, psnr: +0.008%, ssim: +0.014%;
For derf set, psnr: +0.018%, ssim: +0.025%.
No noticeable speed change.

Change-Id: I4e5f15cf10016a282a68e35175ff854b28195944

Change-Id: Ie35a965a6b8de536ccaf61ff61498620d22db205

Change-Id: Ife939930309ceea730dd5df594b8f36e6644bf36

Moves the high bitdepth bit-shift operations to tools_common.c

Change-Id: Ifab91574362609cd224d2d6bae5fde00652eb3e4

The unit test is to check the bitexactness of SSE2 code with C code.

Change-Id: I13cc08a557b02357e5d6c2db7a49e93ce0d8e16f

This reverts commit 72ef1949.

Change-Id: Ic1906bcc6da05d2e6529152b92df809c8e5a2406

The concept:

There's too much noise in source pixels for variance and at low bitrate
the reconstructed looks nothing like the source so we have problems
getting good partitionings with either.   This skirts the issue by using
a box blur scaled down version for variance calculations.  To compare
against source_var_ moved keyframe to be rd based like source_var.

Change-Id: Ie3babdbfadae324b7b5a76bea192893af27f0624

Change-Id: Ie69a164bc166b6a8819777038d65a7d9f9c3361f

This commit breaks the overly broad header files into more
targeted and smaller ones, to help better structure the system
layout.

Change-Id: I7b24559d3ea6e582cf5d9bbe8f71459f9824d71b

Change-Id: I3a7f83ab1dbfcedc8a82fe798c2fa30dd9c7d696

Change-Id: I6f2865bb8ba9295f5c45a4cad065aecbe1e63c32

The basic data defs should be above block operation level.

Change-Id: I7dd9836d01120ab75e0c472baac9f15495ed0db5

Fixed an encoder crash. Set skip_txfm to 0 for cases that skip_txfm
isn't calculated. Put memcpy of skip_txfm at right place.

Change-Id: Ib3b6afc1b251a85b2a853c8138fb3393f48cfef6

Change-Id: If0ea98aa139d14d40cd924114e18396aff36b5a5

The functions b_width_log2 and b_height_log2 only do direct
table fetch. This commit unifies such use cases by using the
table directly and removes these functions.

Change-Id: I3103fc6ba959c1182886a2799d21b8b77c8a7b6b

Add comments on the use case of these definitions. Further reduce
the scope of header file in vp9_context_tree.h.

Change-Id: Ic4a7638e838d0ac441b64abfc56e57354c059d75

The coefficient range checking is enabled when configured with
--enable-debug --enable-coefficient-range-checking
for vpxdec to detect ill-formed input stream. This addresses the
problem raised by issue #792.

Change-Id: I3f9ea541de4dc742dd64389d6c5f543fb1c4f052

Also fixes a case of distortion becoming negative and messing
up the RDCOST computation.

Change-Id: Id345af9e8dfff31ade622be5756e51f2cdface53

Change-Id: I264ee35044a5973c7725daba7af870968353a3c1

Change-Id: Ia212390cf8d36db5436bb0f0e1b696f70066341a