Change-Id: If77800c0904b5e004508274acb32ae46a641405b

Reduce number of modes from 10 to 6, and disable fi modes in UV.
To reduce complexity, apply filter directly without subtracting
the estimated means.

Change-Id: Iaf78d92d31e4a7cc30ea7863b57a9611c5f503e6

Enable to assign distance based weight for joint compound prediction.

(w0, w1) are weights for two predictors of different distance to
current frame.

Use 4 bit precision for quantized distance weight. e.g.
the prediction is generated as

value = (w0 * p0 + w1 * p1) >> n
w0 + w1 = (1 << n), n = 4;

Change-Id: Ib0ff0c41c82b9ebb033f498e90c18a03d18969e4

Change-Id: I32c5015bedef07f58413c679b4aaf30651a357b9

Change-Id: Id3124c0a4724e1c9e94960702445055da1e99277

This experiment has been adopted.

Change-Id: Ife4c18a59791268b7ac0de5a8a08e762a042cae2

After this patch, they use 1 byte instead of 4 bytes.

BUG=aomedia:940

Change-Id: Id00f2a0618e458ba7fb985ecc10d581f156a18cd

MSVC always use int for enum type, this caused the TX_SIZE to be a
4-byte type. This commit is a work around for MSVC to reduce the size
of memory usage.

Change-Id: I5383ca632ccef9951d87e678d505a0918eab1a76

This helps compilers(gcc/clang) to use smaller integer types.

Change-Id: I5ee6bda0a76468daca916c8b9120d9e7e78ade8e

Since CB4X4 is adopted and without it the codec does not work,
it is better to remove it and simplify the code.

Change-Id: I51019312846928069727967e3b2bbb60f0fba80d

Change-Id: I78a8a1749cd4449c61a106f413c697e4a2df0475

Change-Id: I5bff0a68602a89ce480fec049c8b2c4bce44f6bb

Change-Id: I9d3f0380865790d8adcb85f03305b193bc1949d7

This experiment has been adopted, we can simplify the code
by dropping the associated preprocessor conditionals.

Change-Id: I4705652ac8231ee25f960e8096dc97c2aeed1d20

Change-Id: Ic4e04ef959e10b60dae6de8d6da50e7a281e654c

The patch is to enable loop filtering for intra block copy.

Apply loop filtering right after each superblock is encoded.
Use a constant filter level for now. In future updates, the filter
level should be optimized by LPF_SB and better guess value.

Change-Id: I0a5797b5ba5384c00044a8ec4a495dc75aa0f3fe

In this experiment, sharp image discontinuity in the predicted
block is detected. Based on this discontinuity, we choose
particular LGTs as row and column transforms.

Bitstream syntax, entropy coding, and RD search for LGT are added.
One binary symbol is used to signal whether LGT is used. This
experiment can work independently with the lgt experiment.

lowres: -0.414% for key frames, -0.151% overall
midres: -0.413% for key frames, -0.161% overall

Change-Id: Iaa2f2c2839c34ca4134fa55e77870dc3f1fa879f

0.15% improvement on lowres set

Change-Id: If16a8e07797c64508f9e2d9b26ae874ac53c57a4

Change-Id: I5446327378938128f27186015619a079c2845d53

Earlier, the superres scale was in the form of:
N/16, where N ranged from 8 to 16.

We change this to the form:
8/D, where D ranges from 8 to 16.

This helps on the decoder side, by making it possible to work on 8x8
blocks at a time.

Change-Id: I6c72d4b3e8d1c830e61d4bb8d7f6337a100c3064

Enums starts from 0 and are incremented by 1 by default. No need to do
this explicitly.

Change-Id: I3aea5a6b9a39e76f7912f865406c44586072caea

When experiment LOOPFILTER_LEVEL is on, there're four base filter levels
for each frame. This patch enables one to use one delta or four deltas
to update corresponding filter levels for each superblock in
EXT_DELTA_Q.

1 bit per frame is sent through bitstream to select one or four deltas.
Now, we hard code to use one delta.

Change-Id: I9c61a035064fa81878b0575ad21664e2b22a6a45

Before LOOPFILTER_LEVEL, there's one filter level,
now we have four filter levels for y plane vertical,
y plane horizontal, u plane and v plane.

This patch enables experiment LOOPFILTER_LEVEL to support per
superblock loop filter level update.

Change-Id: Ib11a1564471eb3076c26e73e5cdf7b5a3045ef97

This experiment has been adopted, we can simplify the code
by dropping the associated preprocessor conditionals.

Change-Id: Ic077963f72e8cc2ae9872b58c8a0241988384110

Change-Id: Ifa983d83a509cdfad78f6400df7d60c8f5b4f68c

Change-Id: Ieb28f40d85e4db4af33648c32c406dd2931ceb89

Change-Id: I52f204000f5fdaf1c6fff63949d72e858ceea462

Observe 0.1% gain on lowres wo optimize_b before rebase

Change-Id: I0cb5b5e4be2563093efb2f6dfbefdce9b554e910

Instead of storing the transform block average, it is immediately
subtracted from the subsampled pixels. This change does not alter the
bitstream and it reduces CfL complexity.

Change-Id: Ia5038b336abf1ec01e295b235734318906d3bae6

Set filter step = 2, such that 3 bit can represent [-14, +14] filter
level difference.

Tune threshold for reusing filter level between previous and current
superblock.

Change-Id: I6f26377591f3e93f7c068e4aa4279ae9bc2c9522

For each superblock, its filtering range is shifted up and left by
8 pixels (half of the maximum loop filter length), such that
estimation of deblocking filtering will not cross two superblocks.

Change-Id: I82244b7c26ab8b2ac553037b3bb1fe1d82bf5704

For the first superblock, signal a filter level (6 bit).
For other superblocks, signal the delta (3 bit) and sign (1 bit).
To guarantee the delta can be represented by 3 bits, the search
range of current superblock filter level is capped as
curr_lvl = prev_lvl +- ((1 << 3) - 1)

Change-Id: Ibbe2941aa96ec1220ed2adb7edf3d29cb032f0ec

Use common structure for inter and intra tx type information when
possible.

Change-Id: I1fd3bc86033871ffbcc2b496a31dca00b7d64b31

Change-Id: I78bb38e3d61d74442278bd5ed1c4f695b7c8e24a

This adds the tool CONFIG_MAX_TILE
Uniform tiles are implemented using power of two number of rows or columns.
Maximum number of rows or columns is 64
Explicit tiles will follow in a later commit once the command line API is updated for this

Change-Id: Ia8d22e7f4aa779448211496c644937afdf037228

MAX_NUM_TXB represents the maximum number of transform blocks in 1
dimension. CfL requires the maximum number of transform blocks in 2
dimensions. As such, we now use MAX_NUM_TXB_SQUARE instead of the
erroneous MAX_NUM_TXB for the average buffer.

There's an assert guarding for overrun on the average buffer.
This fix stops assertions on 4:4:4 sequences. This patch does
not alter AWCY results as AWCY only covers 4:2:0 sequences (for
which MAX_NUM_TXB turns out to be sufficient). 

Change-Id: I628db0131f60abc2d06cbbe3fe3dc40e28894ce3

This function is given a bsize and an mi array and has to figure out
what partition to use to divide the given bsize in the direction of
the sizes it finds in the mi array. (Since each block size can be
reached by only one sequence of partitions, this can be done
unambiguously)

The previous version was correct, working by looking up entries in the
partition_lookup array. Unfortunately, that lookup isn't quite enough
when CONFIG_EXT_PARTITION_TYPES is true, so it then had to do some
slightly confusing computations to fix things up after the fact.

The new version should be more self-explanatory and doesn't work by
looking things up in a magic array. It looks up the width and height
corresponding to bsize and compares them with the width and height
corresponding to the sb_type at mi_row,mi_col in the mi array. When
CONFIG_EXT_PARTITION_TYPES is false, this is all you need, and the
four corresponding cases can be found by a lookup in an array of 4
elements.

With extended partition types and a sufficiently large block, you have
to do a bit more searching. For example, if bsize is BLOCK_16X16 and
the subsize is BLOCK_8X8, the partition might be PARTITION_SPLIT, but
it might be one of PARTITION_HORZ_A or PARTITION_VERT_A instead. The
new code adds some comments to explain what's going on.

A nice side-effect of rewriting get_partition in this way is that it
lets us completely dispense with the partition_lookup array.

The patch also fixes comments for the A/B extended partitions in
enums.h, which were slightly backwards (a "horizontal split means two
blocks vertically above one another)

Change-Id: I4b48189103aa63e1859f25a15d7690d53ca7baf5

Change-Id: I0e9df3719e5f9a55e1386afe44851d1707e2e01b

Fix the bug forcing encoder/decoder to transmit/decoder all
mbmi info for a superblock first.

Change-Id: I623217655b043fc90adbcc13e4cf2a4a845084ab

Change-Id: I3de1c933ee0fa90e9c0d52e6cbe4bc8bf5482a73