The vbp thresholds are set seperately for boosted/non-boosted
superblocks according to their segment_id. This way we don't
have to force the boosted blocks to split to 32x32.

Speed 6 RTC set borg test result showed some quality gains.
Overall PSNR: +0.199%; Avg PSNR: +0.245%; SSIM: +0.802%.
No speed change was observed.

Change-Id: I37c6643a3e2da59c4b7dc10ebe05abc8abf4026a

Code cleanup, no change in behavior.

Change-Id: I043b889f8f0b3afb49de0da00873bc3499ebda24

Change-Id: Id5fd82a504def2523292466fbaad5dade9424c72

There are no functional optimizations for AltiVec/PPC

Change-Id: I6877a7a9739017fe36fc769be22679c65ea99976

Change-Id: Ic416a7f145001a88f5a7f70dde9b1edbc1b69381

Change-Id: Ibc514684def9914c66f04cb7931f773e2b79c168

Remove redundant offset calculation for effective src_diff address.

Change-Id: I4aab241a36abcef7fd8adf74aed5e12b8b88e0ef

Use 6 xmms instead of 8.

Change-Id: If976ad85d09191d2fb0565399d690f2869dbbcc7

This commit separates Hadamard transform/quantization operations
from rate and distortion computation in block_yrd. This allows one
to skip SATD computation when all transform blocks are quantized
to zero. It also uses a new block error function that skips
repeated computation of sum of squared residuals. It reduces the
CPU cycles spent on block error calculation in block_yrd by 40%.

Change-Id: I726acb2454b44af1c3bd95385abecac209959b10

This commit allows the quantizer to compare the AC coefficients to
the quantization step size to determine if further multiplication
operations are needed. It makes the quantization process 20% faster
without coding statistics change.

Change-Id: I735aaf6a9c0874c82175bb565b20e131464db64a

For large partition blocks(block_size > 32x32), the variance
calculation is modified so that every 8x8 block's variance
is stored during the calculation, which is used in the
following transform skipping test. Also, the variance for
every tx block is calculated. The skipping test checks all tx
blocks in the partition, and sets the skip flag only if all tx
blocks are skippable. If the skip flag of Y plane is 1, a
quick evaluation is done on UV planes. If the current partition
block is skippable in YUV planes, the mode search checks fewer
inter modes and doesn't check intra modes.

The rtc set borg test(at speed 6) showed that:
Overall psnr: -0.527%; Avg psnr: -0.510%; ssim: -0.573%.
Average single-thread speedup on rtc set was 3.5%.
For 720p clips, more speedups were seen.
gipsrecmotion: 13%
gipsrestat: 12%
vidyo: 5 - 9%
dark: 15%
niklas: 6%

Change-Id: I8d8ebec0cb305f1de016516400bf007c3042666e

Also add unit test to avoid same error in the future.

Issue:981

Change-Id: Iaf9889d8d5514cfdff1ea098e6ae133be56d501f

exclude files that only contain functions for non-high-bitdepth builds.
this removes some warnings related to missing prototypes

Change-Id: Ic6642998c46a7b808c6c53b2f9c34bcd4d037abe

remove incorrect specializations in rtcd and update a configuration
check in partial_idct_test.cc

Change-Id: I20f551f38ce502092b476fb16d3ca0969dba56f0

Code refactoring

Change-Id: I410fcce1bc6d95c62c474445f4c97ea8469f1e79

This commit allows the encoder to check the eob per transform
block to decide how to compute the SATD rate cost. If the entire
block is quantized to zero, there is no need to add anything; if
only the DC coefficient is non-zero, add its absolute value;
otherwise, sum over the block. This reduces the CPU cycles spent
on vp9_satd_sse2 to one third.

Change-Id: I0d56044b793b286efc0875fafc0b8bf2d2047e32

This reduces the 8x8 Hadamard transform cycles by 20%.

Change-Id: If34c5e02f3afa42244c6efabe121f7cf5d2df41b