Remove redundant offset calculation for effective src_diff address.

Change-Id: I4aab241a36abcef7fd8adf74aed5e12b8b88e0ef

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

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

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

When the estimated rate-distortion cost of skip coding mode is
lower than that of sending quantized coefficients, allow the
encoder to drop these coefficients. This improves the compression
performance of speed -6 by 0.268% and makes the encoding speed
slightly faster.

Change-Id: Idff2d7ba59f27ead33dd5a0e9f68746ed3c2ab68

This tree should be defined in common/, as it is needed for
both encoder and decoder.

Change-Id: I4f5cbc80025cf2ced14182c98f7c82dc7d0f87db

The postproc settings were not set in decoder_get_frame().

Change-Id: I20d23de3ea18f6df061a53d691d4095d5c62532a

This commit fixes the SSE2 version 8x8 Hadamard transform
alignment and makes it consistent with the C version.

Change-Id: I1304e5f97e0e5ef2d798fe38081609c39f5bfe74

This commit replaces the 16x16 2D-DCT transform with Hadamard
transform for RTC coding mode. It reduces the CPU cycles cost
on 16x16 transform by 5X. Overall it makes the speed -6 encoding
speed 1.5% faster without compromise on compression performance.

Change-Id: If6c993831dc4c678d841edc804ff395ed37f2a1b

This commit makes the encoder to select between SATD/variance as
metric for mode decision. It also allows to account chroma
component costs for mode decision as well. The overall encoding
time increase as compared to variance based mode selection is about
15% for speed -6. The compression performance is on average 2.2%
better than variance based approach, with about 5% compression
performance gains for hard clips (e.g., jimredvga, nikas720p, and
mmmoving) at lower bit-rate range.

Change-Id: I4d04a31d36f4fcb3f5f491dacd6e7fe44cb9d815

It saves one unnecessary motion compensated prediction constructed
by using 8-tap filter.

Change-Id: I101215131e6f38621d5935885f94cc74de6a5377

This commit uses Hadamard transform based rate-distortion cost
estimate for rtc coding mode decision. It improves the compression
performance of speed -6 for many hard clips at lower bit-rates.
For example, 5.5% for jimredvga, 6.7% for mmmoving, 6.1% for
niklas720p. This will introduce extra encoding cycle costs at
this point.

Change-Id: Iaf70634fa2417a705ee29f2456175b981db3d375

webm_read_frame assumes that it won't be called once end of file
is reached. But for frame parallel mode that turns out to be not
true. this patch fixes that behavior by checking for EOS and
returning the appropriate value for subsequent calls.

Change-Id: Ie2fddbe00493a0f96c4172c67be1eb719f0fe8ed

Change-Id: I6df525a9ad1ae3cfbba8710d21db8fee76e64dbb

Metrics on RTC set go down by ~1.5% on average.
Key frame encoding time goes down by factor of ~5.

Change-Id: Ia83acc55848613870e5ac6efe7f3d904d877febb

The reason is due to early break out before outputting all the frames inside
decoder.

Change-Id: I4a138fba08d12935c39bd7602c95f8c18b474e29

Change-Id: I5e2a1270001b7e29f3f198d57ea40e1efccef367