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Exit early from function when supertx is used, rather than putting
the bulk of the function body in a single conditional.

Change-Id: I41f388a45bd46e4a6ee1c51f26782ed9bddff4e5

When using VARIANCE_AQ, we can change the segment assignment after
initialising the quantiser in set_offsets, so re-initialise it when
we do so.

Change-Id: I1f168553aaf0ade419f0d4bf05820cd591b87659

Explicitly signal when the segment map is being refreshed when
using VARIANE_AQ. This simplifies decisions about when the segment id
needs to be set from the previous segment map vs based on the current
variance.

Change-Id: Ieb12c950e9cfbc3f53f4d184880071dea805563c

This is purely refactoring in preparation of fixing supertx segment
handling

Change-Id: I74bcae34241fdf2b592e1cd45b67af77b9e16c9a

Change-Id: I6413b7622a3c8524ec0409e087cf7c92f79e4f2d

Change-Id: Ie98fd60426b18980ec85572f3cfc9ce0b97a5361

This commit combines uniform quantizer with trellis based coefficient
level optimization. It improves the codebase compression performance:

lowres 0.8%
midres 1.0%
hdres  1.6%

Note that the current trellis optimization unit is using C code. This
will make the cost of the overall quantization process slower. A number
of optimizations will come up next.

Change-Id: Id441dd238e4844409d0f08f82604be777f3f5282

Change-Id: I15d54a3ae48b2b33082668116792c6595bdb3ddb

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 f19700fe.

This crashes in SSE2/SumSquares2DTest.RandomValues/0 under x86 due to
alignment issues

Change-Id: I135d83ba6a7894c09d7c7a139b7eaf876416b40c

This reverts commit efda2831.

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

Change-Id: I171937e4daf6f15323e8206418773deb03bd8c53

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