Change-Id: Iccb75d5204f0f52f2c7d6e18d1f8223ce10f68ba

This patch adds bit account infrastructure to the bit reader API.
When configured with --enable-accounting, every bit reader API
function records the number of bits necessary to decoding a symbol.
Accounting symbol entries are collected in global accounting data
structure, that can be used to understand exactly where bits are
spent (http://aomanalyzer.org). The data structure is cleared and
reused each frame to reduce memory usage. When configured without
--enable-accounting, bit accounting does not incur any runtime
overhead.

All aom_read_xxx functions now have an additional string parameter
that specifies the symbol name. By default, the ACCT_STR macro is
used (which expands to __func__). For more precise accounting,
these should be replaced with more descriptive names.

Change-Id: Ia2e1343cb842c9391b12b77272587dfbe307a56d

Change-Id: I371297e6ee000e6dc01ba1544763cbed429b0e5a

From code only part of nextgenv2 (and not aomedia)

Change-Id: I21f7478a59d525dff23747efe5238ded16b743d2

While we are at it:
- Rename some variables to more meaningful names
- Reuse some common consts from a header instead of redefining them.

Cherry-picked from aomedia/master: 863b0499

Change-Id: Ida5de713156dc0126a27f90fdd36d29a398a3c88

- Change struct name to all caps SCAN_ORDER to be locally consistent.
- Rename struct pointers to 'scan_order' instead of hard to read short
  names 'so' and 'sc'.

Cherry-picked from aomedia/master: 30abc082

Change-Id: Ib9f0eefe28fa97d23d642b77d7dc8e5f8613177d

Move computing the segmentation_probs.tree_cdf table per symbol to
 computing it only when the probabilities are updated.

Change-Id: I3826418094bbaca4ded87de5ff04d4b27c85e35a

Move computing the partition_cdf tables per symbol to
 computing them only when the probabilities are updated.

Change-Id: I442f9230ba00be7f5d0558d7c38d7324ad009ee8

Move computing the inter_ext_tx_cdf tables per symbol to
 computing them only when the probabilities are updated.

Change-Id: I5e1e62f8eae8f6b2edbbd378beeb786649502c10

Move computing the intra_ext_tx_cdf tables per symbol to
 computing them only when the probabilities are updated.

Change-Id: I26d5e419e103093e98a7d896c196176305b50fc9

Move from computing the switchable_interp_cdf per symbol to
 computing once per frame when the probabilities are adapted.

Change-Id: I6571126239f0327e22bb09ee8bad94114291683e

This flag was already added to aomedia/master, so bringing it back to
webm/nextgenv2, as part of an effort to get the two codebases in sync.

Change-Id: I2b933a6a160e4210d1411a9e7978149eb8553205

This reverts commit 9b25f306 to
reinstate the reverted commit with fixes that solved the build issues
when --enalbe-clpf is used in configure.

Change-Id: I15447cae7fa9b3deb27976345dc3db230a4a7a60

This reverts commit 97535038.

Change-Id: I9f8e891739352ca2bde4b294e37c85a668f416e0

These signals were in the uncompressed frame header (as a temporary
hack), which caused two problems:

* We don't want that header to be duplicated in the slice header
* It was necessary to signal the number of bits to transmit up front

However, the filter size can be 128x128 which is greater than the SB
size, and a decoder wouldn't be able to know whether to read a bit or
not until the final SB of that 128x128 block has been decoded
(depending on whether the 128x128 is all skip or not).  Therefore the
signalling was changed for 128x128 blocks so that every top left SB of
a 128x128 filter block contains a signal regardless of whether the
block is all skip or not.  Also, all the MB's of 128x128 block are
filtered even if they are skip MB's.  This gives the signal a purpose
even when the 128x128 block is all skip, and it also gives a slight
coding gain as it leaves a way to filter skip blocks, which was
previously forbidden.

Low latency:
PSNR YCbCr:     -0.19%     -0.14%     -0.06%
   PSNRHVS:     -0.15%
      SSIM:     -0.13%
    MSSSIM:     -0.15%
 CIEDE2000:     -0.19%

High latency:
PSNR YCbCr:     -0.03%     -0.01%     -0.09%
   PSNRHVS:      0.04%
      SSIM:      0.00%
    MSSSIM:      0.02%
 CIEDE2000:     -0.02%

Change-Id: I69ba7144d07d388b4f0968f6a53558f480979171

To get ready for pulling AV1 to nextgenv2
Replace the experimental flag by MOTION_VAR. Rename major variables.

Change-Id: If6cf4f37b9319c46d8f90df551cc7295d66ca205

Change-Id: Ic3a6855799be010e69aeab924b013679282ab191

BUG=webm:1311

Change-Id: I03c1043d17ed4e4ea22002473779a9612884c6c6

Change-Id: I31bea3b1f76493060edd7e1bd616a223841d5f77

Objective quality impact (low latency):

PSNR YCbCr:      0.13%     -1.37%     -1.79%
   PSNRHVS:      0.03%
      SSIM:      0.24%
    MSSSIM:      0.10%
 CIEDE2000:     -0.83%

Change-Id: I8ddf0def569286775f0f9d4d4005932766a7fc27

av1_clpf_frame() was always called with the same src and dst,
so we only need one argument and the code supporting different
src and dst was removed.

Change-Id: I70919f50e5cfb19c22eb4dff9ee7c0fa2697fad3

Instead of having CLPF write to an entire new frame and
copy the result back into the original frame, make the
filter able to work in-place by keeping a buffer of size
frame_width*filter_block_size and delay the write-back
by one filter_block_size row.

This reduces the cycles spent in the filter to ~75%.

Change-Id: I78ca74380c45492daa8935d08d766851edb5fbc1

Change-Id: I4a6d84007bc17b89cfd8d8f2440bf2968505bd6a

This commit ports a CLPF change from aom/master by manually
cherry-picking:
7560123c

Change-Id: I61eb08862a101df74a6b65ece459833401e81117

Change-Id: I134d276234b3b8aa7df1ab647892b5d739647f4c

Refactor to streamline the number of profiles needed, in
preparation for the next steps.

NO change in performance.

Change-Id: I753b89299897857f3c250c316b4cdc4fedcb90e8

Cherry-picked from aom/master:
e2721a65

Change-Id: I4ade58be91e7bca0cc4f2bed98a43177d7f590a5

Streamilines the functions and data structures to make it
easy to add new restore options.

Change-Id: Ib00638a5749e6c38c2455f3e3142b1025e6e0624

clang-format authored Sep 19, 2016 and James Zern committed Sep 19, 2016

Change-Id: I186e90d99cd54e66d38159b7cb55a881226b1568

Includes a major refactoring/enhancement to support
tile-adaptive switchable restoration. The framework can be
readily extended to add more restoration schemes in the
future. Also includes various cleanups and fixes.

Specifically the framework allows restoration to be conducted
on tiles such that each tile can be either left unrestored, or
use bilateral or wiener filtering.

There is a modest improvemnt in coding efficiency (0.1 - 0.2%).

Further enhancements will be added subsequently to improve coding
efficiency and complexity.

Change-Id: I5ebedb04785ce1ef6f324abe209e925c2d6cbe8a

clang-format authored Sep 07, 2016 and James Zern committed Sep 15, 2016

Change-Id: If22018f8911d9d7ee99c2127bdfcc56e42b0e2d7

cherry-picked #ecd07473 from aom/master

Change-Id: Id8f45d9c11406fc301b39801c5228ccd6aa2d5d6

cherry-picked #14ed7a61 from aom/master

Change-Id: I077b0e97186bdd292f925e08966a2ca3cf8c250d

this matches style guidelines and stabilizes successive runs of
clang-format across the tree. remaining types should be address in
successive commits.

Change-Id: I6ad3f69cf0a22cb9a9b895b272195f891f71170f

This allows for a clean subtraction of 1 along the transform
matrix diagonal and also makes the order of the parameter list
a little more intuitive.

Change-Id: I6a5d754af41b8d1292f241f9b21473160517d24f

Bitstream syntax:
For a rectangular inter block, 'rect_tx' flag is sent to indicate if
the biggest rect tx is used. If no, continue to decode regular
recursive tx partition.

Change-Id: I127e35cc619b65acb5e9a0717f399cdcdb73fbf0

Uses an array to map block sizes, y tx sizes, and subsampling
factors to various transform sizes for UV.

Results improve by 0.1-0.2%

Change-Id: Icb58fd96bc7c01a72cbf1332fe2be4d55a0feedc

Change-Id: I2b2b70e756b7eb9611b7b33b7d5f19b3b30e0a50

This patch completes the global motion experiment
implementation. It modifies the format of the motion
parameters to use the mv union to facilitate faster
copying and checks for parameters equal to 0 that occur
frequently in rdopt. The rd decisions for the global motion experiment
have also been added to rdopt.
Change-Id: Idfb9f0c6d23e538221763881099c5a2a3891f5a9

Change-Id: Iead3edd8563d7900481eb199e8b003d2d3df075b