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Removing redundant 'extern' keywords. Moving VP9DX_BOOL_DECODER from .h
to .c file.

Change-Id: I5a3056cb3d33db7ed3c3f4629675aa8e21014e66

Allows the user to specify whether decode errors should be fatal or not.
Also makes mismatches optionally fatal.

Change-Id: I58cff4a82f3d42f5653b91cf348a7f669377e632

Removing redundant 'extern' keyword from function declarations and making
function arguments lower case.

Change-Id: Idae9a2183b067f2b6c85ad84738d275e8bbff9d9

The information is a duplicate of "eob" in BLOCKD.

Change-Id: Ia6416273bd004611da801e4bfa6e2d328d6f02a3

Refactors the switchable filter search in the rd loop to
improve encode speed.

Uses a piecewise approximation to a closed form expression to estimate
rd cost for a Laplacian source with a given variance and quantization
step-size.

About 40% encode time reduction is achieved.

Results (on a feb 12 baseline) show a slight drop:

derf: -0.019%
yt: +0.010%
std-hd: -0.162%
hd: -0.050%

Change-Id: Ie861badf5bba1e3b1052e29a0ef1b7e256edbcd0

The issue that potentially broke the encoding process was due to the fact
that the length of token link is calculated from the total number of tokens
coded, while it is possible, in high bit-rate setting, this length is
greater than the buffer length initially assigned to the cpi->tok.

This patch increases the initially allocated buffer length assigned to
cpi->tok from
(mb_rows * mb_cols * 24 * 16) to (mb_rows * mb_cols * (1 + 24 * 16)).

It resolves the buffer overflow problem.

Change-Id: I8661a8d39ea0a3c24303e3f71a170787a1d5b1df

Change-Id: I7c6e3bebd94856b24dbe2aded7f9e04ef8bb8c08

Change-Id: I7b7b8d4fda3a23699e0c920d727f8c15d37d43aa

Fixes to make Entropy stats code work again

Change-Id: I62e380481a4eb4c170076ac6ab36f0c2b203e914

- Using multiplication and shifting instead of division in
  intra prediction.
- Maximum absolute difference is 1 for division statements
  in d45, d27, d63 prediction modes. However, errors can
  cumulate for large block sizes when using already predicted
  values.
- Maximum number of non-matching result values in loops using
  division are:
  4x4        0/16
  8x8        0/64
  16x16     10/256
  32x32     13/1024
  64x64    122/4096

  Overall PSNR
  derf:     0.005
  yt:      -0.022
  std-hd:   0.021
  hd:      -0.006

Change-Id: I3979a02eb6351636442c1af1e23d6c4e6ec1d01d

The issue was caused by a out-of-order merge, which leads to wrong
functions are called at lossless mode.

Change-Id: If157729abab62954c729e0377e7f53edb7db22ca

rebased.

This patch includes 16x16 butterfly inverse ADST/DCT hybrid
transform. It uses the variant ADST of kernel
    sin((2k+1)*(2n+1)/4N),
which allows a butterfly implementation.

The coding gains as compared to DCT 16x16 are about 0.1% for
both derf and std-hd. It is noteworthy that for std-hd sets
many sequences gains about 0.5%, some 0.2%. There are also few
points that provides -1% to -3% performance. Hence the average
goes to about 0.1%.

Change-Id: Ie80ac84cf403390f6e5d282caa58723739e5ec17

The commit changes the coding mode to lossless whenever the lowest
quantizer is choosen.

As expected, test results showed no difference for cif and std-hd
set where Q0 is rarely used. For yt and yt-hd set, Q0 is used for
a number of clips, where this commit helped a lot in the high end.

Average over all clips in the sets:
yt: 2.391% 1.017% 1.066%
hd: 1.937%  .764%  .787%

Change-Id: I9fa9df8646fd70cb09ffe9e4202b86b67da16765

Change-Id: I13d8ae754827368755575dd699a087b3b11f5b16

The 32x32 value in case of splitmv was uninitialized. this leads to
all kind of erratic behaviour down the line. Also fill in dummy values
for superblocks in keyframes (the values are currently unused, but we
run into integer overflows anyway, which makes detecting bad cases
harder). Lastly, in case we did not find any RD value at all, don't
set tx_diff to INT_MIN, but instead set it to zero (since if we couldn't
find a mode, it's unlikely that any particular transform would have made
that worse or better; rather, it's likely equally bad for all tx_sizes).

Change-Id: If236fd3aa2037e5b398d03f3b1978fbbc5ce740e

This issue breaks the encoding process of the codebase. The effect
emerges only in particular test sequence at certain bit-rates and
frame limits.

Change-Id: I02e080f2a49624eef9a21c424053dc2a1d902452

Change-Id: Ie309cb1f683a51c5dfac405fb32e8e2d6ee143ed

Change-Id: I7a5314daca993d46b8666ba1ec2ff3766c1e5042

Since there is no Y2, these values are always zero. This changes the
bitstream results slightly, hence a separate commit.

Change-Id: I2f838f184341868f35113ec77ca89da53c4644e0

Change-Id: I4f46d142c2a8d1e8a880cfac63702dcbfb999b78

allowing the compiler to inline.

Change-Id: I66e5caf5e7fefa68a223ff0603aa3f9e11e35dbb

Used same algorithm as others.

Change-Id: Ifdac560762aec9735cb4bb6f1dbf549e415c38a0