This reverts Change-Id: Ie11dd055255d200954b704b8c2ad8ca3dff7bf5c

BUG=aomedia:1305

Change-Id: I6894928dcadc99a79417034a7096a215693a46f2

When cb_partition_scan is true, only DCT_DCT is considered. Therefore
there's no need to prune transform types; and if DCT_DCT is pruned, we
end up with no transform type to use.

Change-Id: I1d65fe94e72de66fde18e271a598f9e67ade9cfb

Change-Id: Ibe4f7bb61837b6bae6717f0c683fa23f78de5b80

Obtain the most likely partition range from a first pass square
block base partition search. Use the constrained partition search
region for full rate-distortion optimization search in the second
pass.

Tested on pedestrian 1080p at 2000 kbps, it makes the encoding
speed 40% faster for speed 0 and 30% faster for speed 1. The
average coding performance loss is around 0.15%.

Change-Id: Ifc83d48e6413d1b887e68cd1962084e018a2258f

Use simple rate-distortion search route for the first pass coding
block partition.

Change-Id: Iaaec3e1af83f46f625d3de8361eddd79a2bc6cef

Change-Id: If0b1d2fe31569104f2d8eef3cfd42cab30162c7e

Reduce the length of inter_tx_size[] from 1024 to 16.

On a cif test sequence,
encoder memory consumption decreases by 18% (380MB -> 312MB);
decoder memory consumption decreases by 56% (21.4MB -> 9.4MB).

Change-Id: Ie11dd055255d200954b704b8c2ad8ca3dff7bf5c

3~5% encoding speedup for speed 0; no quality loss.

Change-Id: I0e31755f45253e5e99d8d9eed0d7a6fe6050f49f

Speed up recursive transform block partition search. When a txfm
block is selected as all zero coefficients, skip the search over
further split partition.

Tested with txk-sel on, this makes the speed 0 / 1 both 10 - 15%
faster at medium - high target bit-rate range. The coding
performance change is neutral - 0.011% better for lowres set.

Change-Id: I1247f3d5a33d15bf4bc5f0bcbac2bf1f3e1aca2e

Change-Id: Ib6b07f76dd702c40841c88457ca9d96083157354

Compression performance change is < 0.03%;
Encoder speedup 6~19% on speed 0.

Change-Id: I988cf0b0ab0a9ad9985bfb3b8aca672c7554525c

So they can be generated at prediction block, and then easily
accessed by transform block.

Change-Id: I376042e8d57e00586d3cf90e237544e705b77e8b

Skip remaining intra modes in rd search, when current intra_rd
is 1.5 times worse than current best_rd.

Performance: -0.01%
Speed: 5% faster.

Change-Id: I0265fe4618a23d676546b929cd5f694ce9a890f3

BUG=aomedia:1232

Change-Id: Ib2578cdb41128997f7513bc11f86edf43a799959

Change-Id: I829da5fc8007589a1323b49eecf6fa741d51c0e7

Allow transform blocks within an intraBC block to use differenct transform
types.

Change-Id: Ibd1a0e920f9d37fae007eecb3c79e0b1b839b37e

Only consider transform type cost when there are more than just one
candidate.

Change-Id: I3b16bfb7f4d37a1826230396f46b741dbae82ac7

Stop if less than half of the iterations give improvement.

Minor metric changes for a 2.5x speed up of the alpha search.

Results on subset1:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0038 |  0.0466 |  0.1388 |  -0.0103 | -0.0312 | -0.0220 |     0.0330

Change-Id: Ic25a995eee500ffc4b80b73635baf0a710954dc0

Change-Id: I4066561b769cf2bd4af515c9d351f609c08e3076

This experiment has been abandonned for AV1.

Change-Id: Ief8ed6a51a5e7bac17838ebb7a88d88bbf90a96f

Skip transform type search.

Without txk_sel:
Skip remaining transform type search when all transform blocks inside
the coding block have eob = 0.

With txk_sel:
For each transform block, whenever eob = 0, we skip remaining
transform type search.

Speed impact:
On low bitrate, 25% speed up.
On high bitrate, 15-20% speed up.

Performance impact: Google test lowres, 30 frames
With txk_sel: 0.15% drop
Without txk_sel: 0.30% drop

Change-Id: I5e8db730a19feec22e378611046b1ce1ab001c85

Change-Id: I93702d24bf7d711b6910e2e502f9f97c661bcf6c

Change-Id: I83ca47c1469d8e383a815058c02c4826c6282873

Remove all *bmc variables, which were used to record basic motion
search results (no advanced masked compound) when obmc and warped
motion modes were allowed to work with compound ref.
Remove switchable rate that is passed in to it, since in most
motion modes, we need to recalculate the cost based on motion_mode
and the refined mv. This change slightly improve the rd perf.

Performance change: -0.024%

Change-Id: I4afe0927e97cc7e7251022957f7665ed3032079c

This patch simply aggregates the checking on the counts of certain
reference frames in the neighboring above and left blocks. It does
not incur any coding performance change.

Change-Id: I59a962ba95e7ab16731ce97371ec5709a582a0ba

Change-Id: I4f9d014324b35e30f25cae5fa570620249640cf6

Record total rate cost when computing trellis optimization.
Reduce redundant rate computation in later stages.

Speed impact: ~6% speed up
Coding performance should not be affected.

Change-Id: I9e940a2d126bb55930fcf22ea04d061eee1fc944

Skip the rate distortion search over last 2/3 reference frames for
the reference motion vectors derived from non-nearest neighbors.
The overall coding performance change is in the noise range - 0.05%
better. Speed up the encoding process by 20%.

Change-Id: I823b8ca2805ae332f4c9bc8ee255069a82db4331

Make the per transform block kernel selection process unified with
the rate distortion model used in preliminary mode search. This
makes the txk-sel model search space same as baseline.

Change-Id: I82a2d94e88a03c88154582575ced500197f8a409

Change-Id: Iea0e8665cdd5b9bc0fe17930add7068443765ea9

It's more efficient to use av1_cost_literal() instead.

Change-Id: I50727d4a4ee06492b373c2e7831c224c5eae8735

Encoder: Prior to this patch, some chroma data was calculated and
later discarded when in monochrome mode. This patch ensures that
the chroma planes are left uninitialised and that chroma
calculations are not performed.

Decoder: Prior to this patch, some chroma calculations were still
being performed in monochrome mode (e.g. loop filtering). This
patch ensures that calculations are only performed on the y
plane, with the chroma planes being set to a constant.

Change-Id: I394c0c9fc50f884e76a65e6131bd6598b8b21b10

A function to calculate chroma prediction mode info. rate cost for
intra blocks.

Change-Id: Ia71c492284675568db609dfa9ed3b5901f021027

Change-Id: I69e07309b708caa59c313ae2156828d8c089cf4d

A function to calculate luma prediction mode info. rate cost for
intra blocks.

Change-Id: I285518dc34c0ffa58bdcd09e76463c21240336e1

Change-Id: I0cd3de4a5673003f9fbe9c615e139e8133a99dcc

Change-Id: I8bb21fbbc3366690ccc13a9b31a6726dfbfa2ff4

Change-Id: I51a751cd656846e6f3db6c15e320bdc7f1c868fe

Change-Id: I6cd366d929d689217f292db07cbeaf1fd35c2055

The tx size cost should be included in the total rate cost.

Change-Id: Ib8fe9cc67cf712ba1c7c8f539b390909c7e6be7b