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

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

Changes to allow more use of rectangular partitions at
speeds 1 and 2 for content classed by the first pass as
animation and for blocks near the active image edge.

This has quite a big impact in quality for the animated
test sequence but also hurts encode speed for speed 2.

For other content types the impact on both speed and
quality is small.

Added some plumbing for detection of internal vertical
image edges.

Change-Id: I3fc48de2349f8cb87946caaf0b06dbb0ea261a9a

Change speed features / behavior for split mode when there
is an internal active edge (e.g. formatting bars).

Remove some threshold constraints in rd code near the active
edge of the image.

Add some plumbing for left and right active edge detection.

Patch set 5. Limit rd pass through for sub 8x8 to internal active edges.
This takes away any speed penalty for most clips but keeps the enhanced
edge coding for the more critical case of internal image edges

Change-Id: If644e4762874de4fe9cbb0a66211953fa74c13a5

Replace block index with transform type in the argument list. This
allows to save an extra fetch to the prediction mode. For pedestrian
area 1080p coded at 5 Mbps with single tile, the average decoding
speed goes up from 80.55 fps (before the refactoring series) to
81.13 fps.

Change-Id: Icbebf84ce63c19c0c92f3690ed201f6c3eab7881

average improvement ~2x-4x

Change-Id: I20c4f900ef95d99b18f9cf4db592cd352c2212eb

New clang warnings in chromium reveal an incompatible pointer being
passed.

Change-Id: I0d893993726ecf899f467c16175bfb8c76329731
https://code.google.com/p/chromium/issues/detail?id=504696

Change-Id: I66bf6720c396c89aa2d1fd26d5d52bf5d5e3dff1

If only the first dequantized coefficient is non-zero, reset
dqcoeff[0] to zero directly.

Change-Id: I0197ba72028a8ec436f0b1b9abcc1c0ae5d70abe