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Check the availability of the reference frames at the frame level at
both encoder and decoder, and if a reference frame is not available
for a specific video frame, remove the signaling of such reference
frame info at the block level.

This patch adds the consideration of the bit saving inside the RD
optimization loop.

Change-Id: I4c22f1b843b21c7d2b47e118c99c3ad615a3d4e4

This change does not impact the bitstream
  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: I6e131e91bad5efa345ed2542ae970eb6122eff51

This terminates the computation for the warp error once
the frame error exceeds the best frame error found
so far to avoid unneccessary computation.

Change-Id: I094a0b3e13f8b91610e051cb91d20a815879dd80

First keyframe BD-RATE objective-1-fast:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.3705 | -0.3232 | -0.3812 |  -0.3782 |     N/A | -0.3412 |        N/A

First keyframe BD-RATE twitch-1:
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.2479 | -0.2477 | -0.2467 |  -0.2567 | -0.2486 | -0.2508 |    -0.2487



Change-Id: Iea6c895c6fe9e9764887a8968f6e5330903969d3

Remove the special rate-distortion optimization loop for sub8x8
block size from vp9.

Change-Id: I62c6cf537a54769f26f2d4938ebed5fed2c84741

The place where av1_daala_dist() is applied for sub8x8 partition is
moved from sub8x8 mode decision functions to rd_pick_partition().

BD-Rate change by daala-dist with '--disable-var-tx' is:
(AWCY, objective-1-fast, high delay mode)

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
15.1558 | 12.9585 | 14.4662 |  -3.8651 | -1.7102 | -9.2956 |    10.8686

In MSE probe mode:

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.0429 |  0.0435 |  0.1651 |  -0.0415 | 0.0850 |  0.0122 |     0.0546

Change-Id: I3b2ea916d41c48e433eb641adf44552e4725c198

Make the txfm_above and txfm_left be processed in the unit of
miniumum transform block size. Scale the transform block step
size with respect to the mode_info step size.

Change-Id: Iee4421e005db742cd4ff7899215560063e5f68e5

Resolve the enc/dec mismatch issue when filter intra is turned on,
in addition to chroma-sub8x8, ext-tx, and ext-inter experiments.

BUG=aomedia:570

Change-Id: Idf0875763ce24bd8d4022f7338fc86debf4dfd0c

BUG=aomedia:526

Change-Id: I5d9b86a36f412ded2d6f20e198d2f4de4f97aaeb

Change-Id: I05b2c8c116b5e3287be2703e840a28f6dda9c42a

Fixes AV1/AltRefForcedKeyTestLarge.Frame1IsKey test.

Change-Id: I457b5c1dacb9fd2294c650d11821d6a1930d04dc

Account for intra tx size case when coding block is in skip mode.

Change-Id: I030bc05d890c4a7c8d4628a7f9bdebaba6083a03

- Add av1_build_quantize() function so that quantization
  related unit test would be able to access quant/dequant
  table without starting an encoder instance and directly
  accessing cpi.

Change-Id: I8ba429e5deb7a4e7f967996aaec1d20bff0feb3c

Change-Id: I904283119d8f2c1099e6ec2953ea1c10c5e3b280

This commit resolves a rare enc/dec mismatch issue due to the
intracacy of using rectangular transform block size for intra
coded blocks.

BUG=aomedia:562

Change-Id: I10c52339a995a89bafa3a3330469ee3f2b784768

This patch forces DAALA_EC on by default and removes the dkbool coder.

Change-Id: Icd2ff08efd7bf467adf554344111473cb357adf8

This resolves a potential race issue in multi-threading test when
chroma-sub8x8 is enabled.

Change-Id: I443f4af10e55046b04d6d739f7594dd8bda5c830

This reverts commit 05c38874.

BUG=aomedia:553

Change-Id: Ibbfe3e357bbfb8cb7d07482755c47c64afd30092

Currently the "transform units" used to measure transform sizes
in some parts of the code are based on the smallest defined
transform size.

cb4x4 currently defines a 2x2 transform size, even when chroma_2x2
is not enabled, which means that the scale of the transform units
was always double that of MODEINFO units.

Several areas of the code were hard-coding this assumption instead
of converting from one to the other using appropriate constants.

Change-Id: Ibc55671aa5bc3ad272cb8a036f9c4f9621df85ab

reset_skip_context() was always clearing the entropy contexts for
all three color planes, using a block size that corresponded with
the luma plane.

However, when chroma_2x2 is disabled, then for sub-8x8 luma block
sizes, the corresponding chroma block size is always 4x4, and the
skip flag only affects the chroma blocks corresponding to the
upper-left luma block.

This patch makes reset_skip_context() reset the contexts that
actually correspond to the chroma blocks that are skipped (if any).
It also moves reset_skip_context() to av1_reset_skip_context() in
blockd.c, because blockd.h gets included before onyx_int.h, which
declares the required is_chroma_reference() function.
reset_skip_context() was too large and used in too many places to
be a reasonable candidate for inlining, anyway.

AWCY results on objective-1-fast:

cb4x4-fix-base@2017-05-11T06:26:50.159Z -> cb4x4-fix-reset_skip@2017-05-11T06:28:45.482Z
  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.0301 |  0.1068 |  0.1463 |   0.0359 | 0.0260 |  0.0347 |     0.0479

A regression (near the noise range), but without this fix, the line
buffer size required by the entropy contexts will be doubled.

Change-Id: I12fa6e60d9c1c7c85927742775a346ea22b3193f

Create named constants for the minimum TX_SIZE used in the luma
plane, as well as the minimum allowed TX_SIZE for which we have to
explicitly code a selection (i.e., one larger than the minimum luma
TX_SIZE).

Then, use these constants consistently with tx_size_to_depth() to
index the tx_size counts in FRAME_COUNTS, and also consistently use
TX_SIZE named constants to index the tx_size_implied counts.

Failing to index these counts correctly can, e.g., cause tx_mode to
be chosen incorrectly.

Change-Id: I706a62a33e2282e67c97a68bade87fb8023ec13b

* set dependent tile to be default
* make dependent tile to work with supertx

Change-Id: I2bcc73c6e6df46ca0c2fbdae7c4f2944738fff79

It gives 0.1% gain on lowres and midres

Change-Id: I555a492a68571c525713840d73aa5614fe80a87d

Change-Id: Ic04bd1ac62ea35082883d0560f91843040e35a64

This avoids repeatedly computing the frame error in
refine_integerized_param.

Change-Id: If4af77b68a7e61a700bafa3f60940b9017e12b40

Use CONFIG_INTERINTRA to properly separate interintra from the basic
ext_inter experiment.
When macro REDUCE_INTERINTRA_MODES is 1, only 4 ii modes are enabled
so as to reduce the complexity overhead.
(Right now the flag is off)

Change-Id: Iec6f36a1000f181adbb822ad66c7d5b2625e9cc7

Also fix a mismatch for resizing with ext-refs enabled.

There are various preconditions which need to be true for it to
be valid to set cm->use_prev_frame_mvs = 1, including that the
sizes of this frame and cm->prev_frame must be equal.

With ext-refs enabled, we would sometimes decide to change
cm->prev_frame to point to the LAST_FRAME reference, without
re-checking the preconditions. If the LAST_FRAME was smaller
than the current frame, this could lead to reading garbage off the
end of its mv array, and eventually to an encode/decode mismatch.

We fix this by rewriting the preconditions as checks on
cm->prev_frame directly (rather than using cm->last_width and
cm->last_height), and by testing the preconditions after any
possible adjustment.

This should not affect the bitstream unless ext-refs is enabled,
but may affect the bitstream with ext-refs even if resizing is
not used.

BUG=aomedia:521

Change-Id: I7dfd9ba82cdf77acc2e27e0c9f3aee21d6afeb54

Use 2x2 inter prediction for chroma component. This improves the
compression performance by 0.6% for lowres.

Change-Id: If9d98e49cee63f40085b179652bfacc31ff462ea

BUG=aomedia:442

Change-Id: I98ada843016d0dd046f89bbcb2e9ae72442a101e

* Change ref parameter to use LAST FRAME instead of
 previous frame, which makes it consistent in
 enc/dec for tempmv_signaling.

BUG=aomedia:511

Change-Id: I02f1101623b7b3b09cd4d3f2977e9503b95818ec

This experiment extends ALT_INTRA by adding two new modes:
smooth horizontal and smooth vertical.

Improvement on *intra frames* in BDRate (PSNR):
===============================================

AWCY (high latency): -0.46%
(Also, -1.0% or more on PSNR Cb,Cr and APSNR Cb,Cr).

AWCY (low latency): -0.43%
(Also, -0.88% to -0.94% on PSNR Cb,Cr and APSNR Cb,Cr).

Google sets:
lowres: -0.454
midres: -0.484
hdres:  -0.525

Improvement on *video overall* in BDRate (PSNR):
================================================

AWCY (high latency): -0.15%

Google sets:
lowres: -0.085
midres: -0.079

Change-Id: I9f4e7c1b8ded1fe244c72838f336103ccc715d50

Adds a speed feature to control which references to use
to compute global motion.
Also adds logic to not compute duplicate sets of
parameters when reference frames point to the same
buffers.
Includes some renaming of functions to set good speed
features to make things clearer.

Change-Id: I641d33441fde98af18cad8d4db49cf7d5d153ead

Change-Id: I705bbb79104eda4a7db8146e49795dbe80a31a3f

Change-Id: I96e386678f6227f3ca735c9be2725cb9795b3296

The coding gain from this experiment can be mostly obtained
from ec-adapt.

BUG=aomedia:450

Change-Id: Ia7f9df9b2c13d8cdb962eeb39624f3e4e3f036ba

This resolves crashes on awcy due to excessive memory
use. No change in BDRATE.

Change-Id: I1d92d0b53718cfc66f2842cfca68059bafafc64a

This reverts commit 2cf73eb8.

BUG=https://bugs.chromium.org/p/aomedia/issues/detail?id=503

Change-Id: I2b3a4a77854044cb7951c8e64961e72255dfea85

Move all mode stats counting into sum_intra_stats().

Change-Id: I3845b53c3ac58ecfc62d6165e50e5168135c7189

This resolves crashes on awcy due to excessive memory
use. No change in BDRATE.

Change-Id: If3e67683dee6658db16dd5c1d686111e6415c493

* Set ext_delta_q experiment as default
* Update test for ext_delta_q
* Fix a bug (BUG=aomedia:485) in encoder which
  cause decoder and encoder mismatch.

Change-Id: I28ece21c32ff8621f8837ed4807b02eef8c92e29