Support override of the LIBAOM_TEST_DATA_PATH variable via
the CMake command line:

$ cmake path/to/aom -DAOM_TEST_DATA_PATH=path/to/test/data

Change-Id: Idb0f3394584c0d0dfab221b42c539f0ffb15dc65

Recently, sub8x8 inter mode decition functions have been
removed from the av1 codebase, so codebase does not allow
disabling cb4x4 anymore.

This makes pvq not working simply crashing
because we had disabled cb4x4 if pvq is enabled.
Hence, pvq has been fixed for cb4x4.

Also, if pvq is enabled, disable lgt and highbitdepth in the configure.

Change-Id: I2cb675c0dbc12bce60ed6a66c34ea3e907cc35b3

Change-Id: Ib5337dfa78b73059ad169ca98a07119aa991864b

WebM is the intended container here. The recent rollup
of libwebm regressed the output doctype.

Change-Id: I6e9e41bb59abf20f451e5576a4822fe06eb80478

Default probabilities were updated in
d1b8c2a3. Update
recently-added CDFs not covered in this commit
to use these probabilities for initialisation.

AWCY: -0.03%

Change-Id: I5c34d1e890ddb0757df41848a0acc8509fcd4772

Change-Id: Ib05eefeca1fd7819919d26f7ca52138c62306319

Fixes "aomenc: init_mode_probs: Assertion `sizeof(fc->motion_mode_prob)
== sizeof(default_motion_mode_prob)' failed"

Change-Id: I7b71304f50756ffd6e14b03fe338c0d624ce35c5

The cost of signaling the alpha symbol and the signs are added to the
DC_PRED rate in RDO.

Results on Subset1(compared to f9e04152b with CfL enabled)

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.3699 |  1.5330 |  0.8664 |  -0.2881 | -0.3107 | -0.2587 |     0.1954

Change-Id: Icd9827d11ee4ef29dfb527e636f0f380bcafa062

(1) Work with var-refs to remove redundant bits in ref frame
    coding;
(2) Add a new uni-directional compound reference pair:
    (LAST_FRAME, LAST3_FRAME);
(3) Redesign the contexts for encoding uni-directional reference frame
    pairs;
(4) Use aom_entropy_optimizer to collect stats for all the default
    probability setups related to the coding of reference frames.

Compared against the baseline (default enabled tools excluding ext-tx
and global-motion for encoder speed concern) with one-sided-compound,
the coding gain of ext-comp-refs + var-refs - one-sided-compound is:

lowres: avg_psnr -0.385%; ovr_psnr -0.378% ssim -0.344%
midres: avg_psnr -0.466%; ovr_psnr -0.447% ssim -0.513%

AWCY - High Latency:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.2758 | -0.1526 | -0.0965 |  -0.2581 | -0.2492 | -0.2534 |    -0.2118

AWCY - Low Latency:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-1.0467 | -1.4500 | -0.9732 |  -0.9928 | -1.0407 | -1.0180 |    -1.0049

Compared against the baseline (default enabled tools excluding ext-tx
and global-motion for encoder speed concern) without
one-sided-compound, the coding gain of
ext-comp-refs + var-refs - one-sided-compound is:

lowres: avg_psnr -0.875%; ovr_psnr -0.877% ssim -0.895%
midres: avg_psnr -0.824%; ovr_psnr -0.802% ssim -0.843%

Change-Id: I8de774c9a74c20632ea93ccb0c17779fa94431cb

Fixed a bug in my previous patch that causes a compile error (variable 
block undefined) when pvq is on. 

However, with or without LGT, --enable-pvq still has a run time error 
during encoding. This run time error is independent of the LGT 
experiment.

Change-Id: I98ca5f69a916ea8556e45b820c2eb741c9656277

Building with --enable-dct_only will force the encoder to use only
 tx_type == DCT_DCT.
This experiment gives a loss and is only added for testing.

subset-1:

master@2017-02-21T01:23:58.825Z ->
 master-dct_only@2017-02-21T02:57:28.585Z

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
2.5467 |  1.0524 |  0.9171 |   1.8849 | 2.6626 |  2.4995 |     1.8402

objective-1-fast:

master@2017-02-21T01:47:43.790Z ->
 master-dct_only@2017-02-20T16:54:03.578Z

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
1.6625 |  0.3948 |  0.3368 |   1.5268 | 1.7142 |  1.7097 |     1.0743

Change-Id: I19b738f3d1a450bc50422149ac42bc184bfae08a

Global_motion, obmc and warped_motion are now permanently
mutually exclusive.

Change-Id: Ib1a1207cc7caa6459a2027c6c4a50fcf4c451e76

Change-Id: I472775a6877721f5ebee6b14f760227546110b7a

Uses a better non-normative scaler to scale reference frames.

Change-Id: I44b689c8328d6e6fd467c70c9b6b789874818153

Use the uniform way to compue the cost of symbols in AV1.

Results on Subset1 (compared to 8a516a8f with CfL enabled)

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0357 | -0.0854 |  0.0305 |  -0.0422 | -0.0097 | -0.0171 |    -0.1042

Change-Id: Ie908fc7d20c480634002c78027b070223b3ea96d

Alpha's biggest fraction is 1/8, so Q3 does not change the bitstream.

Results on Subset1 (compared to 503aca74 with CfL enabled)

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.0000 |  0.0000 |  0.0000 |   0.0000 | 0.0000 |  0.0000 |     0.0000

Change-Id: I1fe5b2ace97179d5f950d7406a4f3d391924f89d

Change-Id: Id8789a2c352a7c7940e5cabff39acd0d7a584cac

Set LOG_SWITCHABLE_FILTERS accordingly to USE_EXTRA_FILTER

Change-Id: I453fe201a66ec725061899337b17d517c57b9e7a

Change-Id: Idfcc4e19143a45e0729829301acb1e3b711faff0

The allow_lowbitdepth shouldn't be exported to the API at all.
This is a temporary hack to allow API users such as the analyzer,
inspector, and simple_decoder.c to function correctly.

Change-Id: Id171cc0c24d78216647e949a1dc30a81f4cc826d

Change-Id: Ief1fc77294397c32121dc666e09a9a802ff5b7d4

Should always use AOM_ICDF() macro for compatibility with multiple
symbol coding related experiments.
This commit has no effect on metrics.

Change-Id: Iab2c8f2a1234a36ebd1ec4307079d5344214608b

A python script is provided to accumulate stats from counts.stt
files generated from multiple encoding examples. Command line:
python ../../tools/aggregate_entropy_stats.py [dir of stats files]
 [keyword of filenames] [filename of final stats]

Plus cosmetics on output format of optimized prob tables. The comma
after the last element of each dimension is removed, i.e.,
before: {
          { 128, 128, 128, },
          { 128, 128, 128, },
        }
after:  {
          { 128, 128, 128 },
          { 128, 128, 128 }
        }.
The reason is to avoid moving '}' to a second line after applying
clang-format.

Change-Id: I3b764f4c89b7aefbaf48ac00b8c83713caf75a5d

Change-Id: I9bc925ab9b93f5318eb3f1aa3401ff3de2851fef

Change-Id: If7e9ef6509a1be821484f081152bec47ea55cb00

Change-Id: Ibb3a2c8c855fffe6fd75a94da09425d784709431

Change-Id: I9fe592d6fc4bd2cffea8cbc5ac80138f28182ef8

Removing these flags make the EC_ADAPT experiment an integral part of
 the draft AV1 bitstream definition
This commit has no effect on metrics.

Change-Id: Ice78520935e8bfa9d25cf4b8384a1b872069d09c

BUG=aomedia:629

Change-Id: I929e6e1db8491092f3e165d0990f9e10920fb2d3

AWCY results, 1 frame, tune-content=1

objective-1-fast:
PSNR (Y, Cb, Cr) : -0.26%, -0.24%, -0.26%
PSNR-HVS         : -0.26%
MS-SSIM          : -0.25%

screenshots:
PSNR (Y, Cb, Cr) :  -2.28%, -2.29%, -2.29%
PSNR-HVS         :  -2.30%
MS-SSIM          :  -2.26%

twitch-1 :
PSNR (Y, Cb, Cr) : -0.73%, -0.73%, -0.73%
PSNR-HVS         : -0.75%
MS-SSIM          : -0.74%

Change-Id: I7aac475710ab3895778d7ff05d9113f5713133b1

Remove deprecated tree coding when EC_ADAPT is on.

AWCY, objective-1-fast, High Latency:

PSNR (Y, Cb, Cr) : -0.10%, -0.40%, -0.37%
SSIM: -0.11%
PSNR-HVS: -0.07%
MS-SSIM: -0.06%

Change-Id: Ic2d436e037312e1af238a8586983f1288a9a95a8

Use eax instead of rax.

BUG=aomedia:546

Change-Id: Ie3f704557d428d84531311a6bc690293465a622c

Change-Id: I696effc72117b24739947be80ae298de8c6c0e2a

Change-Id: Iea00482779cd3fdc7f354d5c39684dd0752d0849

AWCY Results
High latency -0.18%
Low latency -0.28%

Change-Id: Iaa69eb6a8f039448e5772cf85bec82f51038c8b2

Change-Id: I9c8201c7053dba11e9ac0f02c1bffbb4a322e654

Here we have an LGT to replace ADST for intra residual blocks, and
another LGT to replace ADST for inter residual blocks. The changes
are only applied to transform length 4 and 8, and only for the
lowbitdepth path.

lowres: -0.18%

Change-Id: Iadc1e02b53e3756b44f74ca648cfa8b0e8ca7af4

The block level DC_PRED computed by CfL goes down from Q6 to Q0. This
will allow to reuse existing assembly for DC_PRED and also reduce the
requirements on the multilpy required to scale the reconstructed luma
values

Results on Subset1 (compared to f9684d222 with CfL enabled)

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0347 |  0.0229 | -0.1326 |  -0.0420 | -0.0057 | -0.0072 |    -0.0644

Change-Id: I6ba82cc9e04fa4ab7c8ec40a7856deb273881748

Match cos_bit precision actually used in the decoder (max: 13).

Change-Id: I609f59a9653d74b569420bb0d402ba4f5352aa76

Change-Id: I2833fa31f9e76c412d62538796e6931ff86f9842