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

- 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

stragglers

Change-Id: Ib1e853f9a331b7b66639dc34d79568d84d1930f1

oci -> cm

Change-Id: Ifd75c809d9cc99034d3c2fccc4653a78b3aec21f

pc -> cm

Change-Id: If3e83404f574316fdd3b9aace2487b64efdb66f3

The 32x32 quantization process can potentially have the intermediate
stacks over 16-bit range, thereby causing enc/dec mismatch. This commit
fixes this overflow issue in the SSSE3 implementation, as well as the
prototype, of 32x32 quantization.

This fixes issue 607 from webm@googlecode.

Change-Id: I85635e6ca236b90c3dcfc40d449215c7b9caa806

The two arrays are typically initialized to INT64_MAX, if they are not
filled with valid values before the addition, the values can overflow
and lead to wrong results.

Change-Id: I515de22cf3e8f55af4b74bdb2c8eb821a02d3059

This patch is a reformatted version of optimizations done by
engineers at Intel (Erik/Tamar) who have been providing
performance feedback for VP9.  For the test clips used (720p, 1080p),
up to 1.2% performance improvement was seen.

Change-Id: Ic1a7149098740079d5453b564da6fbfdd0b2f3d2

Switching from mi_{width, height}_log2 and b_{width, height}_log2 to
num_8x8_blocks_{wide, high} and num_4x4_blocks_{wide, high}. Removing
redundant code, adding const.

Change-Id: Iaab2207590fd24d0b76999071778d1395dc5cd5d

Incorporates a speed feature for fast forward updates of
coefficients. This feature takes 3 values:
0 - use standard 2-loop version
1 - use a 1-loop version
2 - use a 1-loop version with reduced updates

Results: derfraw300 +0.007% (on speed 0) at feature value = 1
                    -0.160% (on speed 0) at feature value = 2

There is substantial speed up at speeds 2 and above for low
resolution sequences where the entropy updates are a big part
of the overall computations.

Change-Id: Ie96fc50777088a5bd441288bca6111e43d03bcae

Change-Id: I752e374867d459960995b24d197301d65ad535e3

Const is not needed on the function parameter.

Change-Id: I38c2a7317cb6f42f70bbddfde9a2cd18d65ceb1c

Moving common code from encoder and decoder to this function.

Change-Id: I60fa643fb1ddf7ebbff5e83b6c4710137b0195ef

Change-Id: Ib9354c1d975d03e8081df20d50b6a77dfe2dc7e5

Change-Id: I62bb07c377f947cb72fac68add7a6b199e42c6b9