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We could avoid calling clamp_mv2 because it has been already called
inside vp9_find_best_ref_mvs function.

Change-Id: I08edeaf3e11e98c19e67b9711b2523ca5fb1416e

Change-Id: Ib7803857b35c00e317c9deb8630e777e25eb278f

It is possible to have invalid scale factors and not access them
during decoding. Error is reported if we really try to use invalid scale
factors.

Change-Id: Ie532d3ea7325ee0c7a6ada08269f804350c80fdf

Comment is wrong, we don't initialize any xd pointers. We only initialize
xd->planes[i]->dst and xd->planes[i]->pre[], which are actually initialized
for every block during the decoding.

Change-Id: If152ea872ebef1f83ca70712fa6f8df1b6855f56

Adding set_contexts contexts function and call it instead of
set_contexts_on_border. Calling txfrm_block_to_raster_xy to get aoff and
loff.

Change-Id: I41897e344afd2cae1f923f4fdbe63daccf6fe80e

Updating all foreach_transformed_block_visitor functions to work with
plane block size instead of general block. Removing a lot of duplicated
code.

Change-Id: I6a9069e27528c611f5a648e1da0c5a5fd17f1bb4

This change set is intermediate. The next one will remove all repetitive
plane_bsize calculations, because it will be passed as argument to
foreach_transformed_block_visitor.

Change-Id: Ifc12e0b330e017c6851a28746b3a5460b9bf7f0b

Updating foreach_transformed_block_visitor and corresponding functions
to accept tx_size instead of ss_txfrm_size. List of functions per file:

vp9_decodframe.c
  decode_block
  decode_block_intra

vp9_detokenize.c
  decode_block

vp9_encodemb.c
  optimize_block
  vp9_xform_quant
  vp9_encode_block_intra

vp9_rdopt.c
  dist_block
  rate_block
  block_yrd_txfm

vp9_tokenize.c
  set_entropy_context_b
  tokenize_b
  is_skippable

Change-Id: I351bf563eb36cf34db71c3f06b9bbc9a61b55b73

When the frame size changes the last frame segment map must
be resized to match and initialized to 0.

Change-Id: Idc10de109f55dbe9af3a6caae355a2974712243d

Updated function signatures:
  txfrm_block_to_raster_block
  txfrm_block_to_raster_xy
  extend_for_intra
  vp9_optimize_b

Change-Id: I7213f4c4b1b9ec802f90621d5ba61d5e4dac5e0a

VP9_COMMON is the right place to segmentatation struct because it has
global segmentation parameters, not something specific to macroblock
processing.

Change-Id: Ib9ada0c06c253996eb3b5f6cccf6a323fbbba708

Making foreach_transformed_block_in_plane more clear (it's not finished
yet). Using explicit tx_size variable consistently instead of
(ss_txfrm_size / 2) or (ss_txfrm_size >> 1) expression.

Change-Id: I1b9bba2c0a9f817fca72c88324bbe6004766fb7d

The macro block mode info context originally contained an
entry for each 16x16 macroblock. In VP9 each entry refers
to an 8x8 region not a macro block, so the naming is misleading.

This first stage clean up changes the names of 3 entries in the
structure to remove the mb_ prefix.

TODO clean up the nomenclature more widely in respect of
mbmi and bmi.

Change-Id: Ia7305c6d0cb805dfe8cdc98dad21338f502e49c6

Change-Id: I3ed4beb59371fe21ca3e82253aa98e0cbd5e0630

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

Change-Id: Ia22cfad3211a00a63eb294f64f857b78f4aa9b85

Change-Id: Ia5cdda0f755befcd1e64397452c42cb7031ca574

Change-Id: I7f23d174eb089e5500f268a10db09648634c1b82

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: I599ab1bd22b5f3f10d5962c609952abdef8ff67a

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

Change-Id: I00106f404afd60bfc189905b0fded881684f941a

There was no benefit having this function. For example, inside
read_switchable_filter_type switchable filter context was calculated twice.

Change-Id: I79cd5bf95cbc0f6d8bf91a2e32289e01b18dcff1

Change-Id: I3aae21e88b876d53ecc955260479980ffe04ad8d

Currently the only threaded option for vp9 decode. Enabled when the
decoder config thread count is > 1.

Change-Id: I082959abac9e31aa4a38ed9fd68b94680e57f4df

vp9/decoder/vp9_thread.[hc]
Original source:
 http://git.chromium.org/webm/libwebp.git
 100644 blob b1615d0fb8d311666b2fa4561076c62d72c2e3ff  src/utils/thread.c
 100644 blob 13a61a4c84194c3374080cbf03d881d3cd6af40d  src/utils/thread.h

Local modifications:
 - s/WebP/VP9/g
 - camelcase functions -> lower with _'s

Change-Id: Ib6932640ee34f8b4782c6fbd15864a59d5d4c5fe

This changeset allows to remove vp9_switchable_interp and
vp9_switchable_interp_map arrays and make code much clear. Actually we
still have to use these mapping but only inside read_interp_filter_type and
write_interp_filter_type functions.

Change-Id: I4026c6f8c4acefba6c81421b7bacbaa52cc45f50

Change-Id: I428c4d42212b757112e3acfe5b81314cfbb5fd6b

Using it instead of long unclear verbose check
"mbmi->ref_frame[0] != INTRA_FRAME".

Change-Id: I9c7b4b3797942fa962bf3ba7460fff3084beabe9

Change-Id: I8f21c18b29f54b277fb1c167f278f109d9f3b996

Change-Id: I27471768980fc631916069f24bc7c482a5c9ca17

Removing assign_and_clamp_mv function, making implementation of clamp_mv
and clamp_mv2 more clear and consistent.

Change-Id: Iecd08e1c1bf0379f8314ebe01811f8253f4ade58

Inlining VP9_NMV_UPDATE_PROB constant, consistent local variable names.

Change-Id: I01692501982568fa535882d6b320e3c692f88abb

Passing mi_row and mi_col parameters to functions explicitly. Removing
unused xd argument from scale_mv function.

Change-Id: Icb4c495ec72d26fb066c14470d3ae0b741fbf18a

Using different variable names "allow_hp" and "use_hp" instead of "usehp".

Change-Id: I0cd5996ddeb46bd754473b680a993c0aaf8eb879

Using inter-mode counts instead of inter-mode-tree branch counts inside
FRAME_COUNTS structure.

Change-Id: I60dde13af37d06146d7d15543311c1b5044e9e04

This commit optimizes the tokenization and detokenization operational
flow for speed-up. It makes the coding process about 0.3% faster at
speed 0.

Change-Id: I28008df7482874e4b5f237f2d418ff82a249dd56

This commit provides special handle on 16x16 inverse 2D-DCT, where
only DC coefficient is quantized to be non-zero value.

Change-Id: I7bf71be7fa13384fab453dc8742b5b50e77a277c

Change-Id: I2a6a646570e2af66315e7c658d00d99f80c4b127

Change-Id: I6aa4191935aa93461a07c41b59fdae1eb5f5f107

This commit brought back the shortcut implementation of 8x8/16x16
inverse 2D-DCT. When the eob <= 10, it skips the inverse transform
operations on row 4:7/4:15 in the first round. For bus_cif at 1000
kbps, this provides about 2% speed-up at speed 0.

Change-Id: I453e2d72956467d75be4ad8c04b4482ab889d572

Renaming:
  read_intra_mode_info  -> read_intra_frame_mode_info
  read_inter_mode_info  -> read_inter_frame_mode_info
  read_intra_block_part -> read_intra_block_mode_info
  read_inter_block_part -> read_inter_block_mode_info
  read_ref_frame        -> read_ref_frames
  read_reference_frame  -> read_is_inter_block

Using num_4x4_blocks_{wide, high}_lookup instead of bit shifts.

Change-Id: I83c81573b4ef6f53f2f8d24683895014bebfba61