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Usage of CPU by round_shift_array goes from 2.01% to 1.04%.
Overall encoding is slightly faster (~0.05%).

This means some of the intermediate array have to be aligned.
Also, these functions were moved to common header/source files.

BUG=aomedia:1106

Change-Id: I492c9b1f2e7339c6cb83cfe68a61218642654d1b

Now that the maximum partition size for CfL is 32X32, only one average
needs to be computed by partition. This greatly simplifies the the
cfl_subtract_average() function.

This does not change the bitstream, nor the encoder behavior.

Change-Id: Ib4866442154e4029f2d863e78a8d68d793b83d93

Based on the HW Subgroup call of December 4th 2017, we limit luma partition to
32X32.

Regression on Subset 1
  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
0.0881 |  1.3504 |  1.2936 |   0.0572 |  0.0182 |  0.0227 |     0.5204

https://two.arewecompressedyet.com/?job=CfL-PartU%402017-12-12T15%3A39%3A36.794Z&job=CfL-Max32x32%402017-12-12T16%3A10%3A09.989Z

Change-Id: I7e3cfd68097c0bc24b1426348b5fd574c4f638a0

To avoid a cascade of encodes when performing CfL RDO,
we compute DC_PRED on the partition unit. To do so, we
change the tx_size of CfL to match the size of the
partition unit (i.e. CfL partitions only contain 1
transform block).

This change requires disabling CfL when a chroma
partition-unit-sized DC_PRED is unavailable
(i.e. 4:1, 1:4 partitions and chroma partitions > 32X32).

Results on Subset1 (compared to disabling 4:1 and 1:4 partU):
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.1243 | -1.9286 | -2.0140 |  -0.1514 | -0.1512 | -0.1947 |    -0.8066

https://two.arewecompressedyet.com/?job=master%402017-12-12T14%3A53%3A01.451Z&job=CfL-PartU%402017-12-12T15%3A39%3A36.794Z

Change-Id: I2a4adde79c10089130775b8e0df5f9c198855cad

Change-Id: I4eadddf7c3e99a9a71fd858e46970c1b7d3cd713

Setting --test_decode=fatal no longer checks
U and V planes for monochrome video.

Change-Id: I4ff9f083855223d30bc1cd5d605d866cd5bd1cd7

Change-Id: I899cbbfe28a6d6e8718e18ecff310fe960c3f9bc

Account for the txb_optimize effect on level map context modeling
in the transform block rate distortion optimization search.
Properly update such information in the txb hash rd cost.

BUG=aomedia:1118

Change-Id: I16cf80c57fa37929f94291a7500d84f9e0778400

Previously the tx block order, i.e. the child index, was wrong for
rectangular partition blocks.

Re-eanbles tx rd hash for rectangular blocks, encoder speed up by 7%; no
compression quality loss.

BUG=aomedia:1106

Change-Id: I615b8c56744075088943d372e607c18795cedac4

Use av1_foreach_transformed_block_in_plane.

Change-Id: I22f92b601f6a90e92a93dbff8492df86c717ab6f

Change-Id: Iaf0dd93c4612968db258e78dda0e69cbb152047a

Change-Id: Ie39b11d0cfda205df95650cdced616db148be80a

Minor changes for compile warnings
Merge delta-q changes in bitstream

Change-Id: I732f55e58de3f7eed29b0fe4646714ee6f652324

with the rename in:
1dbe80bc Unify loopfilter function names

the first instance of aom_lpf_horizontal_16_dual_msa was shadowed.
rename this instance and make it private as was done in libvpx.

Change-Id: Ifadae6850c2b7c49ee8f4c988835464ecb3bde94

Also fix one issue with max-tile+LR when the top left tile is not the largest tile.

Change-Id: I721254f63f1a2c6e2c199e27ebaaaebe57234d0f

Blocks with uv_mode == UV_CFL_PRED were pointing past
the end of intra_mode_to_tx_type_context[].

Change-Id: Ia638470ce46f914883bfc3e03f35706ef3d76352

Merged convolve_round experiment and removed its config flag in the code.
Removed compound_round code.

Change-Id: Ic01856732d75cca65d3866383d3cc1dd572f8863

This unifies the coding of signed values in the uncompressed part,
and prevents having one coding for "minus zero".

Change-Id: I3bdc1ab23a33bec0d9a8fe98d5a6bf91df90ff15

HW simplifications for intra predicition.
Changed from 256 points interpolation to 32 points.
Changed values in dr_intra_derivative to be upscaled by 64
instead of 256 and adjusted the angles to be more evenly
spread out. Values are also kept within 10-bits.

AWCY results:
objective-1-fast-1, key-frame only, cpu-used=0
--disable-ext-partition --disable-ext-partition-types
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0476 |     N/A |  0.2705 |  -0.0741 | -0.1357 | -0.1960 |        N/A

Change-Id: I1e1712ab71dc47a3e898b1799ba9e648153735eb

Support the motion field projection for both interpolation and
extrapolation situations.

Change-Id: I74e2d3c8956e62a2731f342f0d7a60dbc6b91ed1

Also, remove warning prevention guard.

Change-Id: I7154f103669e0140068fa6bd7184a8ec34fc7ddf

Change-Id: I8f0f7b7ad996e331c1f1e499e0c6177de9024845

Also, make some locals 'const'.

Change-Id: I030c493b8bb7a1827df16a9feda38dd9dd1e424c

Change-Id: If7fe6c609ee33be4ba243dbb33596b227e313ecd

Change-Id: I7a5b1db07b24f1f97a3324d755ef0438755b1dd2

Change-Id: I834aaf5d043cf591ef3ba01abf7420f08080297d

Change-Id: I9c63b90fd79a925159fd41b05956176127271cd9

Based on av1_convolve_2d_sse2()

Change-Id: Ib648344687eabf5bb6738219206b84224a089aba

Also, fix this test by using 'txsize_sqr_up_map' instead of
'tx_size_sqr_map' in both code and test.

BUG=aomedia:1114

Change-Id: Id72b5e72a40f79ad32819224c99822b5a98538d9

get_nz_map_ctx_from_stats() is take TX_CLASS instead of TX_TYPE, this
commit makes sure right type of parameter is passed in.

Change-Id: I09b97a31890050189fc12f0133c0bde83fc79615

Make sure the ref dv is a valid dv.

Improves compression by about 0.3% on screen_content keyframes.

Change-Id: I3a20c1a04b0ebcad610276f21b410dcfc8ba4c4d

Change-Id: I3801ba8ad8dc5229e95832e46753255ed536efba

BUG=aomedia:1112

Change-Id: I130bc2087c32bd2d9087bf0dfe5919226f5fafa1

tx_type will always greater or equal to DCT_DCT

Change-Id: If82a02621443b231a9bf30b47f5ad41975761f9a

Change-Id: I030205931c78dc572c68661004bafbadd32e4d71

Make the motion field projection process independent of the
reference frame type syntax.

Change-Id: Ie5d024d76ddb990fe623c83b3f4b4b6fadc72d2c

The motion vector storage location in the reference frame is set
to be dependent on the relative frame position, instead of the
reference frame index.

Change-Id: Id8f7d1e6ba32a5ed9e182194178fd2a70094a309

Small related fix in the test itself.

BUG=aomedia:1114

Change-Id: I4a2d9c096e691e6b1a7aa9e4df93752aed8c0935

Also, updated the reference 2D transform function for this to zero out
3/4th of the coeffs and repack the 1/4th non-zeros.

BUG=aomedia:1114

Change-Id: I3dd091689a080e45db0ac4bb2595e705b63f9649

BUG=aomedia:1114

Change-Id: I4f9ae1bbc44517313494aeba68d7aab8596e92d0