CFL is disabled when skip_chroma_rd is enabled. This is done by reusing
the logic in CB4X4. To facilitate integration, the skip logic used in CfL is
moved inside the read/write functions.

Results on Subset1:
master@2017-05-08T19:54:48.196Z -> cfl_baseline@2017-05-08T20:06:55.292Z
  PSNR |  PSNR Cb |  PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.2668 | -12.0951 | -10.4138 |   0.3095 | 0.2998 |  0.2831 |    -3.6579
https://arewecompressedyet.com/?job=master%402017-05-08T19%3A54%3A48.196Z&job=cfl_baseline%402017-05-08T20%3A06%3A55.292Z

Change-Id: I45644baa1aceef5ad4da3332fcb10f3fbaac052b

Since the size used with cfl_load can either be based on the transform
block size and the prediction block size, width and height are used as
parameters instead of TX_SIZE.

This resolves a problem where cfl_compute_alpha_ind was reading
uninitialized memory.

Change-Id: I187dbdd5b2e8bd85e82bb77eb74859bee2cd3f1e

This will improve the lowres performance by 0.1%
No significant change on midres and hdres

Change-Id: I0c6e69bf48596e7e5ad49631ed9f9be73bbf3c9a

Measure SSE for all possible alphas.
Estimate rates for alpha signalling.

Change-Id: Idf1e3c632925cd306090fc38cf5b95eff7ee5c1c
Signed-off-by: David Michael Barr <b@rr-dav.id.au>

The conversion of return value to int64_t appears to be unnecessary.

fixes a number of type conversion warnings for MSVC2015

Change-Id: Ibca24468e73bf22ad07c469ce5d1223635390ecb

Removed "const" from parameters that are passed by value, also fixes
msvc2015 compiler warnings.

Change-Id: I0c7555b4245fa55fabda1c27762fb9f0860bfa18

Writes and reads alpha to and from the bitstream.

A special case is needed on the encoder side to handle prediction block
skips. Since whether or not a prediction block is skipped during CfL, a
rollback is required if the block was skipped and the alpha index was
not zero. The advantage of this is that no signaling is required when
the prediction block is skipped as it is assumed tha the alpha index is
zero.

A encode facade is added to the intra prediction facade as CfL requires
special encoder side operations.

Change-Id: Ic3b11d0fdbd51389d862112eb09d8785127a6b06

This will guarantee that av1_optimize_b will be turned off when
lossless mode is on

Remove heuristic lossless check in optimize_b_greedy

Change-Id: I636c776f3f6b632eb03bc57a470ea43aae4fe0f6

This also avoids having 'bit_depth'/'bd' members whose presence
is decided by the preprocessor.

The goal is to simplify statements accessing the bitdepth value.
(instead of forcing them to also rely on the preprocessor to query
the member presence through #if CONFIG_HIGHBIDEPTH).

Change-Id: I68b822bbaa2b1c67bde81cb4f3f8b9988b798b0d

BUG=aomedia:443

Change-Id: Iebdb609564c2c3040f3902052afeeec7ae83412d

Stores the reconstructed luma pixels for each transform block inside a
prediction block. Rectangular transform blocks are supported.

As for RDO, after all the modes have been tested for luma, an extra
encoding is perform in order to store the reconstructed pixel values of
the best mode. These values are then used for RDO on the chromatic
planes.

Change-Id: I354d9827e32fd41065f1b2ce02832d943a6fa156

inline is undefined in visual studio 2013 for C

Change-Id: I85adb3968e4a98e2d7909cc42e955b1447fcfa26

This is the first patch for ext_delta_q experiment.
* Allow delta q to work with segment features

Change-Id: I9455ebb3b5b23b41daa4afa1149672a20d3a3f2c

This fixes crashes due to infinite recursion when var_tx,
ext_tx and rect_tx are enabled without cb4x4. This
is the first part of an ongoing fix for this experiment
interaction.

Change-Id: I674f28294666102aff2265f6b6112816cac17378

The greedy search method improves the BD-rate over the baseline by
more than 0.2% for lowres test set. Larger gain 0.55% is observed for hdres test set.

[2017.04.06] Cleanup to remove redundant computation. On a local linux
machine, the greedy method is now faster than the trellis method in
encoding the first 100 frames of foreman_cif. However, the BD-rate seems
to become smaller due to the recent changes to the codebase.
[2017.04.06-2] Style changes to meet the requirements.
remove "greedy-optimize-b" in configure
[2017.04.10] Move the changes under the macro USE_GREEDY_OPTIMIZE_B
[2017.04.11] Adjust rdmult to accommodate CpuSpeedTest
[2017.04.12] Set USE_GREEDY_OPTIMIZE_B to 0 at the request of debargha@.
[2017.04.13] Move greedy implementation of optimize_b into a separate
function with the same name (selected by USE_GREEDY_OPTIMIZE_B, default
is 0)

Change-Id: Ic15534f8d696d5f02e8f2e3e9f08b52e41e9efd2

Sebastien Alaiwan authored Apr 12, 2017 and James Zern committed Apr 12, 2017

Rename '--enable-aom-highbitdepth' to '--enable-highbitdepth'

Change-Id: I1de13c3508c30c552532993419d8ace326142ab6

This was broken by commit 1238137c.

When calling the generic coder with a max, it truncates the CDF, but
then tries to encode/decode with the Q15 entropy coder functions
with built-in adaptation. That causes assertion failures, because the
total probability isn't 32768.

We could fix it by re-scaling the CDF, and then doing adaptation
assuming there was no max, but that requires several special-case
code paths.

Instead, since non-robust streams were the only thing that still
required calling the generic coder with a max, and since the gain
from them is very small (and they require doing more DSP just to be
able to parse the stream), we simply remove the option and force
the use of robust streams all the time.

With robust streams enabled, encoder output should not change, and
all streams should remain decodable without decoder changes.

Thanks to Nathan Egge for reporting the problem.

Change-Id: I6c81481abb796688bf703d68f164d208e6a69f20

Properly scale the chroma component size per color plane.

Change-Id: Ibf192d0e99f2fc3611beb82a3a9951ad09b292d3

1) block_raster_idx is actually raster order only when tx_size
is TX_4x8.
It's very specific, so we should put it near to the place it's
actually used.

2) Sync the meaning of block_idx on encoder/decoder sides

Change-Id: I7d37a992cb773503e29f9c0d9d2586e580aa6173

Make is_chroma_reference() account for all the YUV420, 444, and
422 formats.

Change-Id: Ia87e51894493dcea86843194a34e5de05799248a

Change-Id: I7eaff4fd5ee24d6e1138ad8d241dbb63a697961f

In the beginning of encoding and bitstream packing,
the frame context in common of codec is copied to the frame context
in each tile.
Initial prob and context is based on flat probability and
does not come from table at the moment.

The bd-rate change for the test set objective-1-fast
on awcy with high delay mode is:

PSNR   PSNR  HVS  SSIM  CIEDE 2000  PSNR Cb PSNR Cr MS SSIM
-0.77  -1.05      -0.74 -0.67       -0.67   -0.77   -0.88

Change-Id: Ic9105ac68aceb7486cb5f6f1c0b19df5853f2cb9

Change-Id: I35b2b69e3937e70a7923ba76735f035f366de27f

Change-Id: I00554b925c0a870e766bc116c6d9cb02bd47a101

Change-Id: I785a0fbef18adf7cbdbd4f09117d132c7fe69156

Move most of the code of inverse_transform_block to
av1_inverse_transform_block such that encoder can use the
function as well.

Use av1_inverse_transform_block in av1_encoder_block_intra.
This will make the code cleaner.

Change-Id: I84dbeef2c65e252910606dbea446ce43165d504c

This will simplify the code flow in av1_subtract_txb()

Change-Id: I575da4a74f435b5862d2a848bdedae9856672121

A simpler interface for intra block prediction

Change-Id: I97e3f385746928d87999e6862b1d71a197df0302

This function help us merge subtract block code in
av1_subtract_plane and av1_encode_block_intra.

Change-Id: Ie793d88a218f1082c6fe28900a521f461e34d564

This reverts commit c538d681.

Reason for revert: should be av1_fwd_txfm(), instead of fwd_txfm()

Change-Id: I58657e54eb0a1c20c930b32cd53b6d05493eb8f4

Luc Trudeau authored Mar 10, 2017 and Yushin Cho committed Mar 29, 2017

The forward transforms required for PVQ are only performed if the block
is not skipped.

Change-Id: I22de3c7855ed800578a60aa06992cebea8bda119

Change-Id: Ie18fd2b8a3caf3948748ee353fe41e37f5803ba3

1) Add txb_entropy_ctx into MACROBLOCK_PLANE and PICK_MODE_CONTEXT

2) Add av1_get_txb_entropy_context() to compute the entropy context

3) Compute and sore the entropy context before av1_xform_quant()
return

Change-Id: Ia2170523af3163b9456f7c6a305c1e77ad2b23be

Entropy context of above and left block is not used
when PVQ is turned on.

Change-Id: I50c908bba800382438a48f7cc83f8b0f177393a1

Change-Id: Ida4a10fae54591f8f5b740739ab71a2650303958

Add av1_set_txb_context to perform context setting.
This will make the code cleaner and facilitate
lv_map experiment implementation

Change-Id: Iea7e1e8ff6820e2c9cf72961adaa58346a7eca75

Frankly I don't know what this was exactly doing in Daala
but it cannot be supported in AV1 because
state.sb_q_sacaling is not defined.

Change-Id: I75cb9080aa2a4af544b436b07ddcb9c27b3d25c4

Change-Id: I4d43d33725a5a0e6fdfa1168d1397cb122366b19

Change-Id: Id7cbb89ba344770297ef42bf1b09a2b9ba5a1378

Bring the following libvpx commits to aom:
e446ffd Cache optimizations in optimize_b()
50d3629 Repack vp9_token_state

Saves 24600 bytes of stack in the default configuration.

Change-Id: If9d6506cf3fe1c34ab639dedb3ef62a996293781