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The various tap loop filter operations are common functions across
codec. This commit moves them along with SIMD optimizations to
vpx_dsp folder.

Change-Id: Ia5fa0b2e5289cdb98467502a549c380b9c60e92c

Move the clamp functions to vpx_dsp_common.h file. Clear out the
dependency of vp9_loopfilter_filters.c on vp9_common.h file.

Change-Id: I9c4b928bcd7f597106b5aa96354356d3775a3431

This cleans out the unnecessary dependency on vp9 codec-specific
data structures.

Change-Id: Iadbe431174a0f9bf9423f39ab854fc18be554bea

The fast scaling for 1 pass mode was being used only on the
first frame after resizing event (because resize_scale_num/den
is set to 1 and only changed for first frame following resize event).

Change-Id: I723b63e21823eb858f25f5662d2bbe4f1842e61f

Roughly half as many cycles as plain C.

Change-Id: I8c16c29940b76d54ee7e4fb874c328ce90bff5d4

From Change  Ibf0c30b72074b3f71918ab278ccccc02a95a70a0
There is still an issue relating to one animated test clip with repeat
patterns where this change effectively increase the default  maximum
arf interval by +1. This can be examined seperately.

Change-Id: Idd01d5480fc45202d8a059a0c3afc0997cc5bdd1

Flaten the intra block decoding process. It removes the legacy
foreach_transformed_block use in the decoder. This saves cycles
spent on retrieving the transform block position.

Change-Id: I21969afa50bb0a8ca292ef72f3569f33f663ef00

This commit simplifies the intra block boundary condition logic.
It removes the block index from the argument set.

Change-Id: If00142512eb88992613d6609356dfd73ba390138

This reverts commit f8d35016.

Change-Id: If8c7af403c091b7fb447a6f0c73fecdbccbc51b3

This reverts commit 9b4f9f45.

Change-Id: I23545ac8c7464127f7466fc6a58de517874fe0cf

Use faster scaling on source.

Change-Id: I968df97239a86834c96126b86832d3d6d0875a53

Eliminates the byte by byte read from bool decoder,  by reading
in a size_t and then shifting it into place.

Change-Id: Id89241977103fc3b973e4ed172a5cbf246998e5d

Also some log2 lookups.

Pass in 8x8 block width/height and log2 num4x4s instead.

Change-Id: I8ea9a1ec1e0bbab23f8ba556954a1b5433f4d613

The clamp calls with INT32_MIN and INT32_MAX have no effect at all on
int values passed in, therefore this commit removes those effectless
clamps and also adds more const intermediate results to make the code
more readable.

Change-Id: I66d8811f58bb74ec31cbec9a6c441983a662352e

Change-Id: Ib1303dac9043ab1b1f8fce54611cf4ea8a208038

Rework the inter mode transform block decoding loop. Replace the
block index with the row and col index as the input argument. It
saves function call to compute the row and col index according to
the block index and overall block size, and many if statements
associated with the transform block position relative to the coding
block. For the test bit-stream pedestrian_area 1080p at 5 Mbps,
the decoding speed goes up from 81.13 fps to 81.92 fps.

Note that the intra coded block decoding needs more refactoring
work than the inter ones. So keep it using foreach_transforme_block
as for now.

Change-Id: I5622bdae7be28ed5af96693274057f55ba9b4fb4

Change-Id: I1bab0c104df2ec4825d050cd516e26ab635a7b3e

80% fewer cycles than C

Change-Id: I841bde1e268ddd33ae2ee75eee94737a400e2cde

The encoder gets its dqcoeff from the context tree. In the decoder move
it to directly after MACROBLOCKD.

Change-Id: I46c9b76f26956a360d17de0b26ecb994dae34ecb

Even if the recode loop is not enabled for the current frame type
trap the case where the projected size of a a frame is above the
maximum allowed in recode_loop_test()

Change-Id: I453004694b8f8699e3c2a83252e9f83adccdda4e