To avoid 'variable length array' warnings from gcc.

Change-Id: I426f7e93ce674a10b901e79c0c9d9df5d4e47cb6

Parameter changes and modification to zero_last bias.

Change-Id: I50a408d47fde049c562bbe95075194cb0f17c31b

Change-Id: I571ce84c97087f8a1a36a10058393bfdcefbf72a

New code is 10% faster for 64-bit and 25% faster for 32-bit. Compiled
using clang.

Change-Id: I8ba1544c30dd6f3ca479db806384317549650dfc

Use unsigned int type to store the sse in the pixel domain. The
precision is sufficient to handle sse of block size up to 64x64.
The transform domain version however needs int64_t, since there is
a transfer gain applied in the forward transformation that might
cause unsigned int overflow.

Change-Id: Ifef97c38597e426262290f35341fbb093cf0a079

This reverts commit 928ff038

Compiles with 4.6 now.

Change-Id: Ib455da1098bb0e0623248be07579882a425fcbd1

Added the missing "int".

Change-Id: I7c8af3dee700837b40f010d53e1431a59370ae3a

store the number of allocated rows in VP9LfSync, the calculated values
can not be relied on when dealing with corrupt material.

Change-Id: I13b8bcec9738c299a71df726772ab7ac05511e5b

Removed functions:
* vp9_mse16x16_mmx
* vp9_get_mb_ss_mmx
* vp9_get4x4var_mmx
* vp9_get8x8var_mmx
* vp9_variance4x4_mmx
* vp9_variance8x8_mmx
* vp9_variance16x16_mmx
* vp9_variance16x8_mmx
* vp9_variance8x16_mmx

They all have SSE2 equivalent.

Change-Id: I3796f2477c4f59b35b4828f46a300c16e62a2615

This commit allows encoder to skip intra coding mode test, when
the known inter residual is less than the source variance. It
reduces the runtime of speed 3 for test clips:
bus cif 1000 kbps: 8587 ms -> 8260 ms, 3.8% speed-up
pedestrian 1080p 2000 kbps: 161381 ms -> 155241 ms, 3.7% speed-up.

The compression performance is down by
derf   -0.36%
stdhd  -0.25%

Change-Id: I75ce1e035b4da2153cb1ac14111d1a07c05a735d

This commit extends the sse and forward transform computation flag
to support the case 64x64 blocks where there are 4 32x32 2D-DCT
blocks.

Change-Id: I86a3e805dfaa0f3abd812f590520c71aa0e40473

prevents any problems resuming decode after decoding a corrupt frame

Change-Id: Ib7eb1b5c062aebe71074fef1ece32a32822c16be

New SSE2 function is three times faster than MMX one.

Change-Id: I4f387ce9f75b88379176ec7bdc62d86eb5f70fbe

In order to understand memory layout consider the declaration of the
following structs. The first one is a part of our API:

struct vpx_codec_ctx {
  // ...
  struct vpx_codec_priv *priv;
};

The second one is defined in vpx_codec_internal.h:

struct vpx_codec_priv {
  // ...
};

The following struct is defined 4 times for encoder/decoder VP8/VP9:

struct vpx_codec_alg_priv {
  struct vpx_codec_priv base;
  // ... 
};

Private data allocation for the given ctx:

struct vpx_codec_ctx *ctx = <get>
struct vpx_codec_alg_priv *alg_priv = <allocate>
ctx->priv = (struct vpx_codec_priv *)alg_priv;

The cast works because vpx_codec_alg_priv has a
vpx_codec_priv instance as a first member 'base'.

Change-Id: I10d1afc8c9a7dfda50baade8c7b0296678bdb0d0

In the partition search, the encoder checks all possible
partitionings in the superblock's partition search tree.
This patch proposed a set of criteria for partition search
early termination, which effectively decided whether or
not to terminate the search in current branch based on the
"skippable" result of the quantized transform coefficients.
The "skippable" information was gathered during the
partition mode search, and no overhead calculations were
introduced.

This patch gives significant encoding speed gains without
sacrificing the quality.

Borg test results:
1. At speed 1,
   stdhd set: psnr: +0.074%, ssim: +0.093%;
   derf set:  psnr: -0.024%, ssim: +0.011%;
2. At speed 2,
   stdhd set: psnr: +0.033%, ssim: +0.100%;
   derf set:  psnr: -0.062%, ssim: +0.003%;
3. At speed 3,
   stdhd set: psnr: +0.060%, ssim: +0.190%;
   derf set:  psnr: -0.064%, ssim: -0.002%;
4. At speed 4,
   stdhd set: psnr: +0.070%, ssim: +0.143%;
   derf set:  psnr: -0.104%, ssim: +0.039%;

The speedup ranges from several percent to 60+%.
                 speed1    speed2    speed3    speed4
(1080p, 100f):
old_town_cross:  48.2%     23.9%     20.8%     16.5%
park_joy:        11.4%     17.8%     29.4%     18.2%
pedestrian_area: 10.7%      4.0%      4.2%      2.4%
(720p, 200f):
mobcal:          68.1%     36.3%     34.4%     17.7%
parkrun:         15.8%     24.2%     37.1%     16.8%
shields:         45.1%     32.8%     30.1%      9.6%
(cif, 300f)
bus:              3.7%     10.4%     14.0%      7.9%
deadline:        13.6%     14.8%     12.6%     10.9%
mobile:           5.3%     11.5%     14.7%     10.7%

Change-Id: I246c38fb952ad762ce5e365711235b605f470a66

Change-Id: I65b2c1fbed5a306949843315999d10368a100431