This commit makes a non-RD coding mode decision process for key
frame coding. It can be optionally turned on in speed -6 and above.

Change-Id: I0847258b392877a0210b4768bef88ebc9ad009b5

Whitespace changes only.

Change-Id: I92eef49db1798bc69ec003fca69995fea560d6fa

* changes:
  Remove rate component adjustment for AQ1
  Switch AQ1 segment basis from q ratio to rate ratio.

Condition existed for temporal case, added it for spatial as well.
Issue: https://code.google.com/p/webm/issues/detail?id=878.

Change-Id: I38339207f9a94924f5568a081eabe64f867a686d

Change-Id: Ib8810d431fa20a2c78e0caaa28eb2c99903e60fb

In AQ1 a rate adjustment was applied for blocks coded with a
deltaq. This tends to skew the partition selection and cause
rate overshoot.

For example, consider a 64x64 super block where some but not all
sub blocks are in a low q segment and some are in a high q segment.
The choice of Q when considering large partition and transform sizes
is defined by the lowest sub block segment id (currently this implies the
lowest Q). If some parts of the larger partition are very hard this will
cause a high rate component.

The correct behavior here is for the rd code to discard the large partition
choice and break down to sub blocks where some have low and some
have high Q.  However the rate correction factor above mask the high
cost of coding at a larger partition size.

Change-Id: Ie077edd0b1b43c094898f481df772ea280b35960

In defining the Q deltas for segments in AQ1 use a rate
ratio rather than a q ratio.

Change-Id: Id31a74fcf2b7e55437e42a51c21b3cbcb57028d4

Make the midpoint variance used in AQ mode 1 segmentation
depend on the overall complexity of the frame in two pass.

Change-Id: I452814ec57f7a32352e41bb250e78066abe952dd

By using 0xff for a short it was not setting the high bits. When
comparing the output with vtst to find non-zero elements it was skipping
vaules which had no low bits set such as -512 / 0xFE00.

Using -8191 as the first element of coeff will generate this condition.

BUG=883

Change-Id: Ia1e10fb809d1e7866f28c56769fe703e6231a657

6.3% better compression
less than 1% compression time increase

Change-Id: Ie83c059436e54c09de9e7c87e06e0a6d40dc38fe

Better mode selection was implemented for all content.

Change-Id: I479778ed21d3968892f4dce396c83733583f4f23

All the assembly code has been removed, the tests no longer check for
the target, and android and chrome do not use the targets.

Change-Id: I193993f7b2b0bd6478453402f573ce3606e04e8d

Add an additional restriction to bit/complexity based
segmentation based on spatial variance.

Only lower Q when both the number of bits spent
in the initial encoding pass and the spatial complexity are
below a threshold. This will prevent the low Q segments
being used just because there is a surfeit of bits.

Small metrics gains especially opsnr.
derf ~0.2% std-hd ~0.3%

Change-Id: I6a8496d466d673f9b0e2b2ca6304ea7b6d8e1cce

Further patch to restructure AQ mode 1.

Change-Id: I566452a033d047a49a40441a7be24690ea69412d

This is the first of a series of patches to restructure and
improve AQ mode 1 (variance based AQ).

Change-Id: Idcf693131a3ea2459dcfd957a54a65b971fa4a2a

worker hooks return false on error, fix the assignment in Execute() used
in the TestSerialInterface test

Change-Id: I93c2e45f270330ae6d35a3a303411c4ee0f31337

Similar to mask_filter, the filter_cache in RD_OPT struct can be
moved out, and declared as a local variable since it is only
used in pick_inter_mode functions.

Change-Id: I412b99cca82bade07ac912064ec03dd1de6b2c17

Correct calculation of number of mbs in two pass code when
frame resizing is enabled. Always use initial number of mbs if
scaling is enabled, as this is what was used in the first pass.

Change-Id: I49a4280ab5a8b1000efcc157a449a081cbb6d410

The mask_filter in RD_OPT struct is used to record rd result in
filter decision. It is only used in pick_inter_mode functions,
and is removed from the struct and declared as a local variable.

Change-Id: I3c95c8632ba7241591ce00ef2ef5677b5e297d7b

The max_partition_size and max_partition_size are set at the
beginning while setting speed features, and then adjusted at
SB level. Moving them to mb struct ensures there is a local
copy for each thread.

Change-Id: I7dd08dc918d9f772fcd718bbd6533e0787720ad4

This reverts commit 6906d218.

Another way will be used to handle mb struct.

Change-Id: Ic1111a46b2b1ee00f8f9e3fcd4cf3eb6030b2dc4