This commit enables forcing all coefficients zero per transformed
block, when its rate-distortion cost is lower than regular coeff
quantization.

The overall performance improvement (including its parent patch on
calculating rd cost per transformed block) at speed 1:
derf:  0.298%
yt:    0.452%
hd:    0.741%
stdhd: 0.006%

Change-Id: I66005fe0fd7af192c3eba32e02fd6d77952accb5

This commit makes the rate-distortion optimization loop evaluate
the rd costs of regular quantization and all zero coeffs, per
transformed block. It improves speed 1 compression performance:

derf: 0.245%
yt:   0.515%

For a large partition that consists multiple transformed blocks,
this allows more flexibility to selectively force a portion of
them coded as all zero coeffs, as well be continued in the next
patches.

Change-Id: I211518be4179747b57375696f017d1160cc91851

The fake token EOSB may cause invaild memory read in pack token, this
commit reworked the loop to avoid such invalid read.

Change-Id: I37fdfce869b44a7f90003f82a02f84c45472a457

Change-Id: I76f440a917832c02d7a727697b225bac66b99f56

Extracting get_scan_and_band function from get_entropy_context to
remove duplicated code.

Change-Id: I5da1f5a60263017e887da68bc834317b5f084cb2

Current x86inc.asm didn't handle 32bit PIC build properly.
TEXTRELs were seen in the library built. The PIC macros from
libvpx's x86_abi_support.asm was used to fix this problem.
The assembly code was modified to use the macros.

Notes: We need this fix in for decoder building. Functions in
encoder will be fixed later.

Change-Id: Ifa548d37b1d0bc7d0528db75009cc18cd5eb1838

Adding temp variable for &x->plane[0], inlining src_diff values.

Change-Id: I24c08a5425a6da6fd66f5b0278f2fce74f9989b2

Replacing ((1 << MV_MAX_BITS) - 1) with MV_MAX, adding const
qualifiers, reusing computed values.

Change-Id: I7b46d47f6c644b079d9c3478116a9de465a9baec

Change-Id: I168efdc366eecf638694f357ccad2f4eba7e2fdb

Change-Id: Id9ce44f3364dd57b30ea491d956a2a0d6186be05

This commit cleans up the second reference check in the
rate-distortion optimization loop of sub8x8 blocks.

Change-Id: Ife68feaa4cddbfad2878c9b44d3012788d634f97

Modified the resize unit test so that it optionally
writes the encoded bitstream to file. The macro
WRITE_COMPRESSED_STREAM should be set to 1 to enable
output of the test bitstream; it is set to 0 by default.

Change-Id: I7d436b1942f935da97db6d84574a98d379f57fb1

Change-Id: I16633269582a640809dca27572bbe99efa6369fc

The sub8x8 check can be directly inferred from block_idx, hence
removed from the arguments if get_sub_block_mv.

Change-Id: Ib766d57e81248fb92df0f6d9b163e6c77b933ccd

This commit reworked the unit test for 8x8 forward transform. It
allows scalability to cover various implemented versions.

Change-Id: I5594bd3e2307bb5bec764eaffd8860caa260e432

Jenkins was failing to detect the case where an existing
file is recreated with new content. In this case, thinking
that the file already existed, Jenkins did not re-copy the
file as it should have.

By adding the file test-data.sha1 as a dependendency to
the LIBVPX_TEST_DATA build target the files will be
recopied if the MD5 of an existing file changes.

This could be further improved to only copy files that
have changed rather than copying the whole set as done in
this patch.

(Thanks to jzern@ who diagnozed ithe problem and suggested
this fix).

Change-Id: Icea7c61a95189bc639fec83020c28c70da5b2b41

Merge "Speed up iht8x8 by rearranging instructions. Speed improves from 282% to 302% faster based on assembly-perf."

Speed improves from 282% to 302% faster based on assembly-perf.

Change-Id: I08c5c1a542d43361611198f750b725e4303d19e2

The commit added reset of pred_mv at the beginning of each SB64x64
partition mv search, also limited the usage of pred_mv only when
search on the largest partition is already done. This is to fix
a crash at speed 1/2 encoder where an invalid mv is used in mv
search.

Change-Id: I39010177da76d054e3c90b7899a44feb2e3a5b1b

Removed some unused code and minor cleanup
/ reordering.

Change-Id: I4083ae56aeb8edfe9b85aa2f42a16aa28d19da94

Corrected values relating to modified mode order.

Change-Id: I24fccba3af4bc16721d5e7e51888a66305bfa7fe

This is incompatible with most toolchains other than gcc.

Revert "Deleted #include <inttypes.h>"

This reverts commit 4d018be9.

This reverts commit d22a504d.

Change-Id: I1751dc6831f4395ee064e6748281418e967e1dcf

This commit enables adaptive constraint on motion search range for
smaller partitions, given the motion vectors of collocated larger
partition as a candidate initial search point.

It makes speed 0 runtime of bus at CIF and 2000 kbps goes from
167s down to 162s (3% speed-up), at 0.01dB performance gains. In
the settings of speed 1, this makes the runtime goes from 33687 ms
to 32142 ms (4.5% speed-up), at 0.03dB performance gains.

Compression performance wise, it gains at speed 1:
derf  0.118%
yt    0.237%
hd    0.203%
stdhd 0.438%

Change-Id: Ic8b34c67810d9504a9579bef2825d3fa54b69454

The CpuSpeedTest is extended to cover 2pass good quality with CpuUsed
from 0 to 4. The BordersTest is changed to use CpuUsed 1 for faster
turn around.

Change-Id: I005e89adee7fe63af4b1f2a76a3a13ea826feadf