This experiment implements non-uniform quantization where
the width of the bins increases gradually to more closely
match a laplacian distribution of the coeficcients.

Performance Gain:
derflr: 0.15%
hevcmr: 0.675%

Change-Id: I25234244e3bcd94b87c1f77cf682190b61c8ef94

This reverts commit efda2831.

This commit causes segmentation fault at SSE2/SumSquares2DTest.RandomValues/0

Change-Id: I171937e4daf6f15323e8206418773deb03bd8c53

Sarah Parker authored Jun 09, 2016 and James Zern committed Jun 09, 2016

This test is failing when no experiments are turned on. PSNR is
31.96 when the threshold is 32.

broken since:
0d6980d7 Remove swap buffer speed feature

Change-Id: I3c29815b40d5282c37f52f4345b56992f8558b2e

Change-Id: I4b5e1251dc215073384e168a6f845ae059d6c4f2

Change-Id: I7da9e6a85648aa69e5e20d825b717d51e3c6809c

Bring commits 575e81f7 and 3d6b8a66 to VP10. These changes predate
the creation of the active map cyclic refresh test.

BUG=https://bugs.chromium.org/p/webm/issues/detail?id=1224

Change-Id: I3559b6933ffa5649926a4b214e45ed0fae523a25

Also adds a function to integerize a double model.

Change-Id: Ie09b3e165492cf66ab81fe25d4bc2422a5e6defd

Change-Id: I399d601d40827ac383a6687cbeaec59e9a9c63e4

The assumption doesn't hold true in the current codebase. Remove
this speed feature to simplify the codebase.

Change-Id: I9b69f484c9b7cd612b825047cc5b2fce63ee0af7

The inter prediction residual can undergo different transform types
during the rate-distortion optimization search. The assumption used
in this speed feature no longer holds true. This commit removes the
related code to clean up the codebase and clear out unit test
failure in higher speed setting.

Change-Id: I7f7cd4df2345ed3e607c9fae75b38cd2dbde0cac

If it's creating problems with some experiments, disable it under the
actual conditions where it doesn't work and file a bug.

Change-Id: Iab9f4bfe42ea926d49d371918da25f9a8938a20f

Change-Id: I45440a72b4287d98cbe21b72defc67138a8eb953

This ensures using the correct segment_id downstream in
reconstruct_inter_block.

Change-Id: Ia8b6ec60de51fa2e26c326d3c537abb18aea75ae

This commit re-works the transform type speed feature. It moves
the transform type selection outside of the coding mode loop. This
avoids repeated motion search if the best prediction mode is
chosen as NEWMV. It improves the speed performance for clips that
contain more motion activities.

For mobile_cif at 1000 kbps, this makes the baseline encoding 7%
faster and makes the encoding with dynamic motion vector referencing
scheme enabled 10% faster.

Change-Id: I93e2714b3e461303372c4b66a4134ee212faffd1

This patch will make sure the use of the BWDREF_FRAME for the
encoding of both the two types of bipredictive frames, namely
LAST_BIPRED_UPDATE and BIPRED_UPDATE. To realize it, the
updates on the cpi->ref_frame_flags have been moved to before
the encoding of one frame, instread of originally handled after
the encoding of one frame.

RD performance has been improved slightly, approximately by 0.17%
compared to before the applying of this patch:

lowres: Avg -3.474; BDRate -3.324
derflr: Avg -2.097; BDRate -1.353

Change-Id: I0aa19afd752293e345489fbff104c4351ca5498c

The segment counts are computed as part of packing the bitstream,
so they might have been computed already in the recode loop. Zero
the accumulator to avoid double counting.

This fixes some encoder/decoder mismatches.

Change-Id: Ib7816034cbbb1db41101116b706302b02fad3a2c

1. Wiener restoration filter now has normalization and evaluation of
quantization procedure.
2. Corrected scaling of bits in RD cost computation.
3. Changed dynamic range and number of bits for Wiener filter.
Observed gains: Overall 0.58% for low_res, 0.7% for mid_res sequences.

Change-Id: I8928b3ea493bfe1790926b00388d6c4bafc08e19

Change-Id: Ifd5ed91e4e91238fb53a202c8d76c11fbb9ccf7c

Change-Id: I1d5b2408f27a1e277574c2238f1e49e884596309

We can optimize wedge partition selection by pre-computing the
residuals of the 2 underlying predictors, and then blend these
to compute the sse of the compound predictor, without actually
having to compute and subtract the compound predictor.

Similarly we can pre-compute a proxy array which we can use to
cheaply check which mask sign would have lower sse.

Details are in wedge_utils.c.

Mathematically these are equivalence transformations, but due to the
finite precision the encoder output will be perturbed, though on
average this should make 0% difference.

ext-inter gains about ~4.5% speedup.

Change-Id: Ib2657c3209ae161b4090b58b4b6c392641bf2792