The 32x32 forward transform can potentially reach peak coefficient
value close to 32700, while the rounding factor can go upto 610.
This could cause overflow issue in the SSSE3 implementation of 32x32
quantization process.

This commit resolves this issue by replacing the addition operations
with saturated addition operations in 32x32 block quantization.

Change-Id: Id6b98996458e16c5b6241338ca113c332bef6e70

This helps clear out some of the warnings

Change-Id: Ie7ccaca8fd92542386a7f1b257398e1bdf2f55dc

The segment feature SEG_LVL_SKIP requires the prediction unit size
to be at least BLOCK_8X8. This commit makes the requirement to be
explicit. This is to prevent future encoder implementations from
making wrong choices.

Change-Id: I0127f0bd4c66e130b81f0cb0a8d3dbfe3b2da5c2

There is another unit test that has been failing randomly on win32
build. Investigation has shown that the failure was caused by simd
register state is not reset appropriately in the fdct8x8 test. This
commit added ClearSystemState() in the teardown of this test, tests
showed it resolved the random failure issue for win32 build.

Related issue: https://code.google.com/p/webm/issues/detail?id=614

Change-Id: I9381d0c1a6f4b855ccaeef1aca8c417ac8c71ee2

Change-Id: I42c497b68ae1ee645b59c9968ad805db0a43e37e

This is a bitstream change but no currently produces videos should
be affected. https://code.google.com/p/webm/issues/detail?id=610

Change-Id: Ic85a6477df6c201cdf7f70f6bd84607b71f4593c

Change-Id: I62bca0e7a4bffc1a78b750dbb9df9d2378e92423

Vp9 postproc is disabled for now as its not been shown to help and
may be merged with vp8.

Change-Id: I25620d6cd34c6e10331b18c7b5ef7482e39c6057

Moves counting of mv branches to where we have a new mv, instead of after
the whole frame is summed.

Change-Id: I945d9f6d9199ba2443fe816c92d5849340d17bbd

Change-Id: Ib67e996b4a6dcb6f481889f5a0d84811a9e3c5d1

Convert mv_class if statements to look up.  re order to avoid ifs...

Change-Id: I76966a21bf517bb1f9a7957c08c476c7bb3e9a63

Speed 4 fixed partition size. Use fixed size unless it does not
fit inside image, in which case use the largest size that does.

Change-Id: I250f7a80506750dd82ab355721624a1344247223

This commit fixed the potential overflow issue in the SSE2
implementation of 32x32 forward DCT. It resolved the corrupted
coded frames in the border of scenes.

Change-Id: If87eef2d46209269f74ef27e7295b6707fbf56f9

While static-thresh is on, we only need to transmit skip
flag if skip = 1. The cost of skip bit is added to the
total rate cost.

Change-Id: I64e73e482bc297eba22907026298a15fa8cc3920

- Intermediate height was not correct i.e. when block size is 4 and
  y_step_q4 is 6. In this case intermediate height was
  (4*6) >> 4 = 1 and vertical interpolation needs two source pixels
  plus 7 extra pixels for taps.
- Also if the current output block is 16x16 and we are using 4x upscaling
  we need only 12 rows after horizontal filtering instead of 16.

  Patch Set 2: Intermediate_height updated after CL 66723
               "Fix bug in convolution functions (filter selection)"

Change-Id: I5a1a1bc2ac9d5edb3a6e0818de618bf318fdd589

Change-Id: I55c3b60c4c0f4910d3dfb70e3edaae00cfa8dc4d

Make the new test module comply to the unit test rules.

Change-Id: Id79ff7f03f870973ffbc74f26d64edb418b75299

Added some code to output normalized rd hit count stats.
In effect this approximates to the average number of rd
operations/tests per pixel for the sequence.

The results are not quite accurate and I have not bothered
to account for partial SB64s at frame edges and for key frames
However they do give some idea of the number of modes /
prediction methods being tested for each pixel across the
different partition sizes. This indicates how much scope their
is for further gains either by reducing the number of partitions
examined or the modes per partition through heuristics.

Patch 3 moved place where count incremented so partial rd
tests that are aborted with INT_MAX return are also counted.

Example numbers for first 50 frames of Akiyo.
Speed 0 ~84.4 rd operations / pixel
Speed 1 ~28.8
Speed 2 ~11.9

Change-Id: Ib956e787e12f7fa8b12d3a1a2f6cda19a65a6cb8

* changes:
  consistently name VP9_COMMON variables #3
  consistently name VP9_COMMON variables #2
  consistently name VP9_COMMON variables #1