This commit makes the encoder to perform motion search only once
per reference frame type for each 4x4/4x8/8x4 block. For bus_cif
at 2000 kbps, the runtime goes from 253812ms -> 217817ms
(14% speed-up) for speed 0.

Change-Id: I5f17599ccc8cfaf93ccb4f98fcb6008af6d79e92

Change-Id: I4884cdc2557d25d50c7c4f7e19b1ad8bdb93cd63

Removing tile_rows and tile_columns from VP9Common, removing redundant
constants MIN_TILE_WIDTH and MAX_TILE_WIDTH, changing signature of
vp9_get_tile_n_bits.

Change-Id: I8ff3104a38179b2c6900df965c144c1d6f602267

Cosmetic code changes, renaming 'flat' local var to 'mask', removing
unused field 'blim' from loopfilter_info_n and loop_filter_info structs.

Change-Id: I51e6ccf727fe361ad9a08e29e1201aa7abd4987f

* changes:
  delete vp9_loopfilter_sse2.asm
  vp9_loopfilter_intrin_sse2: cosmetics: fix indent
  delete x86/vp9_loopfilter_x86.h
  vp9_loopfilter_intrin_sse2: make some funcs static
  vp9_loopfilter_intrin_sse2: remove unused uv funcs
  vp9_loopfilter: remove uv function typedef
  filter_block_plane: reuse some constants
  vp9_loopfilter.c: make some functions static

s/frame_rate/framerate/g

Change-Id: I6fc3e088e419c5f46e3a9390dd8a2cad2677a2fc

sse2 functions are provided by vp9_loopfilter_intrin_sse2.c

Change-Id: I40454d26034e3ef915eeaf889937fe7d1b519b9b

Change-Id: I892e76d5ad1443b2ea0d1a7839fe26afe9c68ffb

also remove prototype_loopfilter{,_block} defines from vp9_loopfilter.h

Change-Id: I865ab3f9436c7b1ca166f76630328abf01389405

This commit enables SSE2 implementation of 16x16 inverse ADST/DCT
hybrid transform. The runtime goes from 5742 cycles -> 1821 cycles.
This provides about 1% encoding speed-up at speed 0.

Change-Id: I1678d0988bf30b9efd524877705bbb3645edb17b

This prevents possible float rounding issues between architectures.

Change-Id: I6ed260aebd49feb4cfb5596a5370c44be5f72167

Removing vp9_modelcontext.c.

Change-Id: If2316c58dead2708d9f95b52d9494ba4c1dd7427

Making implementation of vp9_set_pred_flag_{seg_id, mbskip} consistent
with vp9_get_segment_id without using confusing sub(a, b) macro. Passing
mi_row and mi_col to functions explicitly instead of replying on
mb_to_right_edge and mb_to_bottom_edge.

Change-Id: I54c1087dd2ba9036f8ba7eb165b073e807d00435

Change-Id: I94b97a966b5efbc9a243048f1f5ddbbdc4b1846e

In the prior code, the above context pointers used for entropy
decoding were initialized on the first frame, and not updated when
the frame size changed. The per-frame code which initializes the
contexts assumes that the contexts are contiguous, leading to an
incomplete initialization when the frame is smaller. This commit
updates the pointers so that the context is contigous whenever
the frame size changes.

Change-Id: I08b53e3a30c8289491212311682ff1b8028cff6c

This is a short term optimization till we work out a decoder
implementation requiring no frame border extension.

Change-Id: I02d15bfde4d926b50a4e58b393d8c4062d1be70f

Removing unused and duplicated constants, moving them from *.h to *.c
if possible.

Change-Id: Ief4d6b984a3ca2e9b38504f0d855ed072cf7133f

This is required because upon downscaling, if a motion vector points
partially into the UMV (e.g. all minus 1 of 64+7 pixels, i.e. 70),
then we can point up to 140 pixels into the larger-resolution (2x)
reference buffer UMV, which means the UMV for reference buffers in
downscaling needs to be 140 rounded up to the nearest multiple of 32,
i.e. 160.

Longer-term, we should probably handle the UMV differently by detecting
edge coverage on-the-fly and using a temporary buffer for edge extensions
instead of adding 160 pixels on all sides of the image (which means a
CIF image uses 3x its own area size for borders).

Change-Id: I5184443e6731cd6721fc6a5d430a53e7d91b4f7e