Adding set_skip_context() function used from both encoder and decoder.

Change-Id: Ia22cfad3211a00a63eb294f64f857b78f4aa9b85

There will be another change set to rename BLOCK_SIZE_TYPE enum to
BLOCK_SIZE.

Change-Id: I8d1dfc873d6186fa5e554262f5169e929978085e

Change-Id: Ia5cdda0f755befcd1e64397452c42cb7031ca574

Change-Id: I7f23d174eb089e5500f268a10db09648634c1b82

'skippable' can remain unset and negatively affect later decisions

address one aspect of issue #599

Change-Id: Iffdf0ac2e49ac481c27dc27c87fa546d4167bb28

Loop filter configuration doesn't belong to macroblock, so moving it from
MACROBLOCKD to VP9_COMMON. Also moving the declaration of loopfilter struct
from vp9_blockd.h to vp9_loopfilter.h.

Change-Id: I4b3e34be9623b47cda35f9b1f9951f8c5b1d5d28

Change-Id: I531829e5aee2a4a7a112d528ecccbddf052d0e74

The set_offsets call is necessary inorder to set the
mode_info_context ptr correctly.

Change-Id: I644910cc5bacc50ee9cd78458843274ad8ee636d

The memset sets 16 bytes rather than the correct size of the
final array dimension (MAX_MODE_LF_DELTAS).

(In response to bug posted by Manjit Hota to codec-devel
and webm-discuss lists)

Change-Id: I8980f5aa71ddc9d7ef57c5b4700bc28ddf8651c7

Change-Id: I599ab1bd22b5f3f10d5962c609952abdef8ff67a

Becuase the routine is used by both vp8 and vp9

Change-Id: I2d35b287b5bc2394865d931a27da61f4ce7edeeb

Change-Id: Id578f8afdeab3702fc8386969f2d832d8f1b5420

Change-Id: Id5cc3566cc16d1e3030ddb4d1c58459320321dca

Removing redundant parenthesis and curly braces. Combining declarations
with initializations. Adding useful intermediate variables instead of
recalculating expressions every time.

Change-Id: I00106f404afd60bfc189905b0fded881684f941a

The mix use of double type and simd code caused invalid values stored
in double variables, further caused unit tests to fail. The failures
were only observed on x86-win32-vs9 build with vs2008.

Change-Id: If0131754a3bf217a5ace303b7963e8f5162c34b5

Change-Id: Iab951c555037e36b154f319f351c5e67f9abb931

Change-Id: I541a178d997b4541e0e2d4d5b854e2ed6b113c3a

Adds a new subpel motion estimation function that uses a 2-level
tree-structured decision tree to eliminate redundant computations.
It searches fewer points than iterative search (which can search
the same point multiple times) but has the same quality roughly.

This is made the default setting at speeds 0 and 1, while at
speed 2 and above only a 1-level search is used.

Also includes various cleanups for consistency and redundancy removal.

Results:
derf: +0.012% psnr
stdhd: +0.09% psnr
Speedup of about 2-3%

Change-Id: Iedde4866f5475586dea0f0ba4cb7428fba24eee9

Moving this block of code into a function makes the
code easier to read and change.

Change-Id: If4ede570cce1eab1982b188c4d3e4fd3d4db236e

Different partitionings were not being evaluated against
best_rd and there were unnecessary calls to RDCOST. This
could have resulted in a non-optimal partioning being
selected.

I simplified the variables used to track the rate,
distortion and RD values throughout the function.

Change-Id: Ifa7085ee80d824e86791432a5bc6d8fea5a3e313

Change-Id: I040b82b8e32aee272d10cbb021c7ba1c76343d7a

Using block width and block height instead of their logarithms. Using
SUBPEL_BITS and SUBPEL_SHIFTS constants instead of magic numbers.

Change-Id: I4e10e93c907c8a5e1cb27dfe74d1fcdcc4995448

The low precision 32x32 fdct has all the intermediate steps within
16-bit depth, hence allowing faster SSE2 implementation, at the
expense of larger round-trip error. It was used in the rate-distortion
optimization search loop only.

Using the low precision version, in replace of the high precision one,
affects the compression performance by about 0.7% (derf, stdhd) at
speed 0. For speed 1, it makes derf set down by only 0.017%.

Change-Id: I4e7d18fac5bea5317b91c8e7dabae143bc6b5c8b

Removing the old one bsize_from_dim_lookup. Now we have a way to determine
block size for plane using its subsampling values (ss_size_lookup). And
then we can find the number of pixels in the block (num_pels_log2_lookup).

Change-Id: I6fc981da2ae093de81741d3d78eaefed11015db9