Change-Id: Iff1a7e35c439f0baa7240eef75fcb5da46d06a4c

This experiment has been fully adopted and is now an integral part
of the draft AV1 bitstream definition.

objdump -d libaom.a gives identical output before and after this
patch.

Change-Id: I6f936f4b10de23a9471e0ccadf9cf178fb62be69

Change-Id: Ie67266538db41c6aa7d79a5c270c26c021583c48

Change-Id: Iabd239a311b92cb47e43666745a1e903a80aab1b

Since those two experiments have been merged into the dist-8x8 experiment and
can be turned on by 'aomenc' ccommand line option,
"--tune=[daala-dist|cdef-dist]".

Change-Id: If21542a6868147538f5c3be6ad49368579db4b53

Change-Id: I858893147ee3cb369001bc094d8f848476019047

Avoid silent failures resulting in endless build loops.

BUG=aomedia:701

Change-Id: I76d3e0bdddf473fc364abf0c956fcad5f7e3103c

Change-Id: Icdce2ac2203bacdcbbbf17d1fc3308dc1ed15974

Change-Id: Ife4e7e4f62b217fd55db1ec3ef69c243f1651777

The change is purely an encoder-side tuning, which constrains a GF
group interval to be either 8, or 12, or a number larger than 12
(maximum of 16). The change is under ext_refs.

This work has been part of the summer internship effort by chendixi@.

Further, this CL removes the experiment of flex_refs and merges it
into ext_refs, as flex_refs has been completely focused on the encoder
side optimization for ext_refs.

On Google test sets, above (stillness + interval enforcement) achieve
a coding gain in BDRate as follows, compared against the AV1 baseline
with all tools enabled by default (excluding ext-tx, global-motion,
and convolve-round for speed concern):

lowres: avg_psnr -0.193%; ovr_psnr -0.370%; ssim -0.332%
midres: avg_psnr -0.556%; ovr_psnr -0.680%; ssim -0.798%

Change-Id: Ia992d8ef0d82cc0ef2caba5eec9b26f0358e6bde

CONFIG_UV_LVL --> CONFIG_LOOPFILTER_LEVEL
Change name because the experiment combines filter level search
in U, V plane, and horizontal, vertical search in Y plane.

Change-Id: Ia05b8f80cd93b60a0305eb94e5783559ef904c13

Mrc_tx is currently not working with lv_map, supertx and
coef_interleave and requires var_tx.

Change-Id: I6e9d7a54ed10a7a4e5c2088d5907ac8dc610a474

Avoid changing the public API based on an experiment flag:

- Remove aom_config.h include from aom_image.h.
- Unconditionally include the existing API additions.
- Add some missing doc comments (silences Doxygen warnings).
- Return an error when using ctrl flags that require
  CONFIG_COLORSPACE_HEADERS when it's not enabled.
- Move colorspace_headers to the correct section of configure.
- Move CONFIG_COLORSPACE_HEADERS to the correct section of
  aom_config_defaults.cmake.
- clang-format style check appeasement

Change-Id: I7b5d72c6f9f1a5561409d7813ba59180d98d8805

When ext-comp-refs is enabled, one-sided-compound is enabled by default,
which ensures the use of ext-comp-refs is an extension of
one-sided-compound. Both coding tools allow the use of same-sided
reference frame pairs for compound prediction.

Also, remove the dependency of ext-comp-refs on var-refs, i.e. these two
coding tools can be independently enabled. They can still work together
if both are enabled simultaneously.

Change-Id: I3134e7e2956dc35d557fe814f5d801d473683650

Rather than disabling MMX (well, all of SIMD) for daala transforms,
selectively disable the AV1 TX SIMD through
av1/common/av1_rtcd_defs.pl

This also requires quite a few testing build fixups.

Change-Id: I689eaafbdd3a87e3a8eeef97412a1846ef886055

CONFIG_DAALA_DCT4 currently force-enables CONFIG_DCT_ONLY due to a
missing 4-point DST.  The DST had not been included because it was a
significant coding performance loss; this turned out to be a bug that
has since been corrected.

This patch adds a 4-point type IV DST to the DAALA_DCT4 experiment.
There is a small coding performance loss in using the type IV over
AV1's current type VII.

subset-1:
   monty-newdst4test-baseline-s1-F@2017-07-29T04:58:43.976Z ->
      monty-newdst4test-daala-s1-F@2017-07-29T04:59:56.094Z

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0336 |  0.1393 |  0.0491 |   0.4118 | -0.0439 |  0.2084 |     0.0476

objective-1-fast:
   monty-newdst4test-baseline-o1f-F@2017-07-29T04:58:10.439Z ->
      monty-newdst4test-daala-o1f-F@2017-07-29T04:59:04.678Z

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
0.0064 |  0.1071 | -0.0108 |   0.1133 | -0.0035 |  0.0765 |     0.0502

Change-Id: Ie29835edbe0e41bc86f4b09457e88d924cc9bf7e

This will remove the compilation failure for the weekly run on speed
checking.

Change-Id: Idf688c7e4c6fcb4c5aabef68b0e9f68996cd9a12

This experiment replaces the 64-point Type-II DCT and related
scaling vp9 transforms with the 64-point orthonormal
Daala transforms.

subset-1:

    monty-square-baseline-s1-F2@2017-07-28T03:35:45.962Z ->
      monty-square-dct64-s1-F2@2017-07-29T04:50:58.412Z

       PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
    -0.1930 | -0.2037 | -0.0643 |  -0.1917 | -0.2331 | -0.3510 |    -0.1810

objective-1-fast:

    monty-square-baseline-o1f-F2@2017-07-28T03:35:35.533Z ->
      monty-square-dct64-o1f-F2@2017-07-29T04:50:28.542Z

       PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
    -0.2557 | -0.1743 | -0.4900 |  -0.3028 | -0.4147 | -0.5764 |    -0.2864

Change-Id: I1f944df29e44d2e350c42555af274f2d75a62a92

This experiment has been adopted as it has been cleared by Tapas.

Change-Id: I0682face60f62dd43091efa0a92d09d846396850

Change-Id: I6b529f8aac561c746bf2805e601931f982bdbb88

No change to metrics, as quantization matrices are not used
unless --enable-qm=1 is set on the command line.

Fix no highbitdepth compilation, and fix compile errors and
warnings for PVQ and NEW_QUANT experiments.

Change-Id: I49aceb5acf6ca6790c81e760e5b208788f87086d

This experiment replaces the 32-point Type-II DCT and 32-point
Type-IV DST scaling vp9 transforms with the 32-point orthonormal
Daala transforms.

subset-1:

    monty-square-baseline-s1-F3@2017-08-02T11:50:51.375Z ->
      monty-square-dct32-s1-F3@2017-08-02T11:50:18.859Z

      PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
    0.0000 |  0.0115 | -0.1044 |  -0.0185 | -0.0069 | -0.0603 |     0.0555

objective-1-fast (4 frames):

    monty-square-baseline-o1f-F3-l4-fine@2017-08-12T02:18:05.560Z ->
      monty-square-dct32-o1f-F3-l4-fine@2017-08-12T02:19:44.461Z

      PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
   -0.0269 | -0.0715 |     N/A |  -0.0547 | -0.0268 | -0.0590 |        N/A

Change-Id: Ib1bad991d82eb67956e94a6216298a84e908b169

Low latency, cpu-used=0:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.3162 | -0.6719 | -0.6535 |   0.0089 | -0.3890 | -0.1515 |    -0.6682

High latency, cpu-used=0:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0293 | -0.3556 | -0.5505 |   0.0684 | -0.0862 |  0.0513 |    -0.2765

Low latency, cpu-used=4:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.2248 | -0.7764 | -0.6630 |  -0.2109 | -0.3240 | -0.2532 |    -0.6980

High latency, cpu-used=4:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.1118 | -0.5841 | -0.7406 |  -0.0463 | -0.2442 | -0.1064 |    -0.4187

Change-Id: I9ca8399c8f45489541a66f535fb3d771eb1d59ab

This experiment is now adopted as it was cleared by Tapas.

Note: Palette use can still be controlled by command-line option
"--tune-content=..." in 'aomenc'.

Change-Id: I832f49f20f60c34bdef5b424755849c496687e87

Because the palette is not supported by PVQ yet.

Change-Id: If432f5c43d24726ad99161f1f76fa6c28267ca8b

Change-Id: Iec7969ffd8f53ca2f4eefd1d757cfec7b3bde131

Change-Id: I0c3772110e9fa62ac687bd99e290b5006bf3bd6c

Change-Id: I5d8615b585f3c4da6af1c1bfd073bdea94ac9df0

Distortion metric that is currently used for CDEF is also used for
distortion of luma channel during RDO-based mode decision.

This experiment works on the top of 'dist-8x8' experiment.

The BD-Rate change by this experiment for three frames of
objective-1-fast in AWCY is:

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
1.1589 | -2.0036 | -1.9620 |  -0.0076 | -1.4145 | -1.4561 |    -0.6410

Change-Id: I1142fe2f186f4ed86e4d33468e00b84e30b20233

When ext-tx is disabled, the mrc-tx implementation is not complete,
so they must be enabled together for now.

Change-Id: Ib049f0e15023272c44a905581842db0626cdf14d

This experiment aims at merging lbd/hbd txfms

So far this exp uses hbd transform on lbd path.
The performances I observed are
lowres -0.089%
midres  0.065%
(negative means performance drop)

Started from here, two main things are needed to be done.
1) Fix overflow due to quantizer noise
2) Generate a 16-bit version from the hbd txfm

Change-Id: I35bb1fc0cbb78decad2570ff5826ed665f739752

CONFIG_ONTHEFLY_BITPACKING no longer guards any code. Remove
the flag from the configure and CMake builds.

Change-Id: Id5605155bdedbf540fe5b9cea3899e8de5ee1062

Compared against baseline with default enabled tools (except for
ext-tx and global-motion for speed concern):

                 altref2 -> altref2 + flex-refs
lowres: avg_psnr -0.395% -> -0.460%
midres: avg_psnr -0.418% -> -0.478%

In particular, flex-refs improves the coding performance for the
following 3 clips while no impact on all other clips:

bowing_cif.y4m:    avg_psnr  0.023% -> -1.022%
pamphlet_cif.y4m:  avg_psnr  0.454% -> -1.111%
snow_mnt_480p.y4m: avg_psnr -0.162% -> -1.948%

Change-Id: I612c1ae5feb1f07d8bd5aaf67e21a076445e10b9

This stores frame contexts alongside a reference frame, and always
uses the frame in reference slot 0 (LAST_FRAME) as the source of
the frame context.

The encoder could then reorder reference frames as to control
which frame context is used, however currently it does not.

Low Latency AWCY result:

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.1438 |  0.4161 |     N/A |   0.0386 | -0.0281 |  0.0453 |     0.2514

https://arewecompressedyet.com/?job=before-frame-context-signaling%402017-06-07T23%3A20%3A49.473Z&job=after-frame-context-signaling%402017-06-07T23%3A21%3A36.117Z

Change-Id: I4f6f9b12cb403573efbf9e5c3077d62f5dedc467

The performance on default experiment is
lowres: 0.812%

midres/hdres and AWCY tests are still running

Change-Id: Id2209c79df6517732dd06c2712a7bdefde118ead

This experiment replaces the 16-point Type-II DCT and 16-point Type-IV
DST scaling vp9 transforms with the 16-point orthonormal Daala
transforms.  These have reduced complexity and are perfect
reconstruction.  There is currently no net coding performance impact.

subset-1:

  monty-square-baseline-s1-F@2017-07-23T03:43:45.042Z ->
     monty-square-dct16-s1-F@2017-07-23T03:42:29.805Z

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0152 | -0.0028 | -0.0929 |  -0.0432 | -0.0457 | -0.0425 |    -0.0237

  objective-1-fast:

  monty-square-baseline-o1f-F@2017-07-23T03:44:19.973Z ->
     monty-square-dct16-o1f-F@2017-07-23T03:43:22.549Z

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.0305 |  0.0926 | -0.1600 |   0.0471 | 0.0219 | -0.0075 |     0.0135

Change-Id: I54fed26d65fd8450693334bb400b1fafd7e0dacb

CfL is now an independent mode.

Results on Subset1 (Compared to 4266a7ed with CFL enabled)

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.1645 | -0.4017 |  0.2475 |  -0.1851 | -0.2179 | -0.2338 |    -0.2897

Change-Id: I2e86e7ea7bfc12bb1d763e70a136ca992d57a3c5

Previously, U, V planes share the same filter level with Y.
Here, we search and pick the best filter level for U, V planes.
Selected filter levels are transmitted per frame.
This works with parallel_deblocking.

Coding gain on Google test set:
		Avg_psnr	ovr_psnr	ssim
lowres: 	-0.116		-0.120		-0.339
midres:		-0.218		-0.228		-0.338
hdres:		-0.260		-0.264		-0.365

Change-Id: I03d2ac47539f3eea9f3c4b08007bd6d3f4b73572

Change-Id: Ie2c34490dc50cb242bcd701308e6b55243883b15

MRC_DCT uses a mask based on the prediction signal to modify the
residual before applying DCT_DCT. This adds all necessary functions
to perform this transform and makes the prediction signal available
to the 32x32 txfm functions so the mask can be created. I am still
experimenting with different types of mask generation functions and
so this patch contains a placeholder. This patch has no impact on
performance.

Change-Id: Ie3772f528e82103187a85c91cf00bb291dba328a