Missing features:
* RDOPT (Forced on for certain blocks)
* Any form of border extension
* Non MI sized right and bottom edges
* MV prediction

Present features:
* Force intrabc for some blocks
* Carry intrabc in the bitstream
* Validate DV is causal
* Reconstruct intrabc block assuming border extension is unnecessary

Change-Id: Ib1f6868e89bfacc2a4edfc876485bad1b347263b

Change-Id: I246da885154303d139f5d97c53ebfc55d6dc82ca

Currently, mbmi->ref_mv_idx can be set to a nonzero value
on the encoder side if mbmi->mode is one of NEARMV, NEWMV,
NEAR_NEARMV, or NEW_NEWMV. But it can only be nonzero on the
decoder side if the mode is NEARMV or NEWMV. Hence av1_nmv_ctx
has previously been disabled when ext-inter is enabled, to
prevent a mismatch due to this.

This patch changes the encoder behaviour to match the decoder
behaviour.

Change-Id: Icfe41fb72e76731ae373fe8c6065f5e003f6414f

This commit changes is_inside() function to reduce the code polution
of CONFIG_DEPENDENT_HORZTILES.

Change-Id: Ic065cc337e0246379d87966a49ddeb48b975c5be

Change-Id: I378eb5b2c03a4c30d261128bcf9ef00ea987ed40

Lowres: 0.03% improvement, 1% improvement on waterfall_cif.y4m
Midres: 0.085% overall improvement, 1.253% improvement on station2_480p25.y4m
Change-Id: I3872934d978bb4ca828c6b9acd2fdb951d9da299

Also supports homography models for future experiments.

Change-Id: I4510540f54133e063891ed491c95c087222f7810

Integerizes computation of the least squares for warped motion.
The model is restricted to only Affine. Affine seems easiest
to compute and integerize since it can be split into two 3-dim
least squares problems, as opposed to rotation-zoom which needs
a 4-dim least-squares problem to be solved.
The current implementation requires only one division per block.

BDRATE impact is mminimal. The upgrade to the affine model improves
coding efficiency but integerization also degrades efficiency a
little. Overall there is a net gain of about -0.07% BDRATE on
the lowres set.
BDRATE lowres: -1.113% with ----enable-warped-motion vs. without
(up from -1.044%).

Change-Id: I6b9216ac0737d76f59054293eabee48e17739ec4

Change-Id: I1050b69045407381d4626b65a0bf6f35957a66f4

This follows the naming for the other frame types, and allows libaom
to be compiled against other libraries that also #define NONE.

Change-Id: Ic2e2814587bbc5ea67385a9af775396d29b7dde0

Take out the functions set for sub8x8 block sizes.

Change-Id: I15836df44051f2c8679c317d52eab9ef55fb5b17

Updates to enums and mappings as needed.

Change-Id: Ie3a71031c74a5d4caa5308f0e210ed23c2361e95

Performance gain (REF_MV on by default)
WARPED_MOTION: 1.061%
WARPED_MOTION+MOTION_VAR: 2.917%
MOTION_VAR: 2.337%

Change-Id: I43f742a02cdd43d13ef333a0a15087062ad020ab

This also fix a few compiler warnings of comparison between signed
and unsigned values.

Change-Id: I1d633f4dfdffff73743dc3f373564056c6d58813

simp_mv_pred is now merged into ref-mv, this commit removes the code
that is leftover. Removing them fixes compiler warnings.

Change-Id: Iad0c521d10924d0eeeaad0b5022beddf9d2bacce

Merge the modifications in simp_pred_mv to ref_mv.

Change-Id: I5662124c1ac7133d76697522f06e42b277a4ad8d

Replace the int_mv storage in the ref_mv_stack struct with unit8_t
integer to indicate the prediction difference level.

Change-Id: I0bfbcab350a46ecdd5bc47bd918cce9614365227

This commit re-synchronize the reference frame type use cases in
the dynamic motion vector referencing system.

Change-Id: Ib25231c716db4176cd67cbdc889472a06b607194

This commit adds simp-mv-pred experiment. The experiment is to work on
top of ref-mv experiment to save memory bandwidth and reduce the size
of line buffer needed in ref-mv experiment.

When compared to ref-mv, this experiment showed:
low-delay BDR gain: 0.03%
High-delay BDR gain: 0.01%
memory/memory bandwidth saving: 40%
local memory/gate count saving: 20%

Change-Id: Ic4006e041fc58ede411da83d0d730c464ebe1749

the line buffer.

As compared to ref-mv, the results of this integration are:
low-delay BDR gain: 0.03%
High-delay BDR gain: 0.01%
memory/memory bandwidth saving: 40%
local memory/gate count saving: 20%

Change-Id: Ic4006e041fc58ede411da83d0d730c464ebe1749

It always returns true since the related misc_fix[1] was merged.

[1] 23e83574

Change-Id: Ie3af685572a2f0a42d2b9fb9903c1abeea225dfd

- Const correctness
- Refactoring
- Make variables local when possible etc
- Remove -Wcast-qual to allow explicitly casting away const.

Cherry-picked from aomedia/master: c27fcccc
And then a number of more const correctness changes to make sure other
experiments build OK.

Change-Id: I77c18d99d21218fbdc9b186d7ed3792dc401a0a0

It always returns true since the related misc_fix[1] was merged.

[1] 23e83574

Change-Id: Ie3af685572a2f0a42d2b9fb9903c1abeea225dfd

This allows the hardware decoder to start decoding ref_mv_idx
syntax prior to the sorting stage and hide the latency of entropy
decoding. The compression performance change is about 0.01% level.

Change-Id: I86b34f31f6c99a36ae2780416175cc0bd90ff492

This commit merge the fix that adds clamping to motion vectors before
they are added to list of MVs in find_ref_mvs().

Related tracking issue:
https://bugs.chromium.org/p/webm/issues/detail?id=1012
Original libvpx commit:
293e20df

Change-Id: I6916a321f374f521187aae96d87bcfd2954db629

Change-Id: I9152f898dfacdf3877ed719f193bb1e0dbee0a1a

This commit merges the fix of motion vector clamping correction.

Related tracking issue:
https://bugs.chromium.org/p/webm/issues/detail?id=1037
Original libvpx commit:
dea99899

Change-Id: If3bc4ddccd5d25d8cc40d273cf0ab14aeefbcfe3

This commit merges the misc-fix of removing a duplicate check on MV
values.

Related tracking issue:
https://bugs.chromium.org/p/webm/issues/detail?id=662
Original libvpx commit:
43be86db

Change-Id: Ibb1db543c6641dfd74979b927651c53f62088159

This reverts commit 7c00aff6.

Change-Id: I2426d68be1d9307f6e1eda66b0f150f43e435224

This commit merges the misc-fix of removing a duplicate check on MV
values.

Related tracking issue:
https://bugs.chromium.org/p/webm/issues/detail?id=662
Original libvpx commit:
43be86db

Change-Id: I63c7df5edca41637124daab7547ff26c30a73238

Change-Id: Ib1088c3fc80952074e098385fe5eb81742e7dc59

This allows the hardware decoder to start decoding ref_mv_idx
syntax prior to the sorting stage and hide the latency of entropy
decoding. The compression performance change is about 0.01% level.

Change-Id: I48d9878df337d053d597d96c153ef444399a5115

Change-Id: I2b2b70e756b7eb9611b7b33b7d5f19b3b30e0a50

Change-Id: I129476e2b8294e660c64723cbc74eb055458c19c

Cherry-Picked the following commits:
0defd8f2 Changed "WebM" to "AOMedia" & "webm" to "aomedia"
54e66767 Replace "VPx" by "AVx"
5082a369 Change "Vpx" to "Avx"
7df44f17 Replace "Vp9" w/ "Av1"
967f722f Remove kVp9CodecId
828f30ce Change "Vp8" to "AOM"
030b5ffc AUTHORS regenerated
2524caee Add ref-mv experimental flag
016762be Change copyright notice to AOMedia form
81e55269 Replace vp9 w/ av1
9b94565b Add missing files
fa8ca9f2 Change "vp9" to "av1"
ec838b76  Convert "vp8" to "aom"
80edfa01 Change "VP9" to "AV1"
d1a11fb9 Change "vp8" to "aom"
7b582513 Point to WebM test data
dd1a5c8d Replace "VP8" with "AOM"
ff00fc0f Change "VPX" to "AOM"
01dee0bb Change "vp10" to "av1" in source code
cebe6f0c Convert "vpx" to "aom"
17b05679 rename vp10*.mk to av1_*.mk
fe5f8a8a rename files vp10_* to av1_*

Change-Id: I6fc3d18eb11fc171e46140c836ad5339cf6c9419

Manually cherry-picked commits:
ceef0583 libvpx->libaom part2
3d26d916 libvpx -> libaom
cfea7dd7 vp10/ -> av1/
3a8eff73 Fix a build issue for a test
bf4202ed Rename vpx to aom

Change-Id: I1b0eb5a40796e3aaf41c58984b4229a439a597dc

clang-format authored Aug 11, 2016 and James Zern committed Aug 12, 2016

Change-Id: I01d8241eba3ccaf4d06c00a51df2d17c126f6f9d

We have renamed following Macros to avoid name confusion:

REFS_PER_FRAME --> INTER_REFS_PER_FRAME
(= ALTREF_FRAME - LAST_FRAME + 1)
MAX_REF_FRAMES --> TOTAL_REFS_PER_FRAME
(= ALTREF_FRAME - INTRA_FRAME + 1)

INTER_REFS_PER_FRAME specifies the maximum number of reference frames
that each Inter frame may use.
TOTAL_REFS_PER_FRAME is equal to INTER_REFS_PER_FRAME + 1, which
counts the INTRA_FRAME.

Further, at the encoder side, since REF_FRAMES specifies the maximum
number of the reference frames that the encoder may store, REF_FRAMES
is usually larger than INTER_REFS_PER_FRAME. For example, in the
ext-refs experiment, REF_FRAMES == 8, which allows the encoder to
store maximum 8 reference frames in the buffer, but
INTER_REFS_PER_FRAME equals to 6, which allows each Inter frame may
use up to 6 frames out of the 8 buffered frames as its references.
Hence, in order to explore the possibility to store more reference
frames in future patches, we modified a couple of array sizes to
accomodate the case that the number of buffered reference frames is
not always equal to the number of the references that are being used
by each Inter frame.

Change-Id: I19e42ef608946cc76ebfd3e965a05f4b9b93a0b3

Move the reference frame type definitions to common/enums.h file.
Replace hard coded numbers.
Combine repeated definitions.

Change-Id: I288e079a03e448014cc181bcdb3f88ee8ec8d139

This commit refactors the reference frame structure used in the
dynamic motion vector referencing system, and makes it support
the bi-directional reference frames. This resolves unit test
failure (enc/dec mismatch) when both are turned on.

The compression performance (ref-mv + ext-refs) is improved by
0.2% for lowres.

Change-Id: I233624d8fccc1f69e82295f94de984ff056365dc