vp8_pick_intra4x4mby_modes uses the passed in distortion
for an early breakout.  The best distortion was never saved
and the distortion for TM_PRED was always used.

Change-Id: Idbaf73027408a4bba26601713725191a5d7b325e

min_q is required to be <= max_q.

Change-Id: I28eccf96df3b52a94913762b54c4fbe0d021ce5e

Previously, the DC check is to make sure there is no code-able
DC shift for quantizer Q0, which has been verified rather
conservative. This commit changes the criteria to have two
components, DC and AC, to address the conservativeness. First,
it checks if all AC energy is enough to contribute a single
non-zero quantized AC coefficient. Second, for DC, the decision
to skip further considers two possible scenarios: 1. There is
no code-able 2nd order DC coefficient at all; 2 The residue is
relatively flat, but the uniform DC change is very small, i.e.
less than 1/2 gray level per pixel.

Comparing to previous criteria, the new criteria is about 10%
to 15% faster in encoding time with a very small quality loss.
(threshold ~1000 and quality range 33db-45db)

It should be noted that this commit enables "automatic" static
threshold for encodebreakout if a non-zero small value is passed
in to encoder.

Change-Id: I0f77719a1ac2c2dfddbd950d84920df374515ce3

The condition for using RD when selecting the intra coding mode
for a MB is that the RD flag is set AND we're not in real-time
mode.

Previously the code used RD if either the RD flag was set OR
we were not using real-time mode.

Change-Id: Ic711151298468a3f99babad39ba8375f66d55a08

This function was using a variance metric compared to and SSE metric in
other places (eg. vp8_rd_inter_uv)

Change-Id: I9109fcc5a13bca9db1d7ead500fe14999ab233eb

Adds following targets to configure script to support RVCT compilation
without operating system support (for Profiler or bare metal images).
 - armv5te-none-rvct
 - armv6-none-rvct
 - armv7-none-rvct

To strip OS specific parts from the code "os_support"-config was added
to script and CONFIG_OS_SUPPORT flag is used in the code to exclude OS
specific parts such as OS specific includes and function calls for
timers and threads etc. This was done to enable RVCT compilation for
profiling purposes or running the image on bare metal target with
Lauterbach.

Removed separate AREA directives for READONLY data in armv6 and neon
assembly files to fix the RVCT compilation. Otherwise
"ldr <reg>, =label" syntax would have been needed to prevent linker
errors. This syntax is not supported by older gnu assemblers.

Change-Id: I14f4c68529e8c27397502fbc3010a54e505ddb43

vp8/encoder/rdopt.c:728: warning: pointer targets in passing argument 3
of 'macro_block_yrd' differ in signedness
vp8/encoder/rdopt.c:541: note: expected 'int *' but argument is of type
'unsigned int *'

distortion is signed when calling macro_block_yrd is both other cases,
as well as for RDCOST

Change-Id: I5e22358b7da76a116f498793253aac8099cb3461

Change-Id: I6ca2d89f355839c4c770773c09fc69dcea7c1406
warning: implicit declaration of function
  'vp8_variance_halfpixvar16x16_[h|v|hv]_neon'
  'vp8_sub_pixel_variance16x16_neon_func'

Improved the performance of the first pass only
(~6% on 720p test clip) by making use of LUT instead of the
float calculations.  Might try a SIMD version later.
Also started to make use of int_mv instead of
MV.

Change-Id: If2a217c7d6b59cd2c25c5553e0ca7e0502403af8

Reduce the code size.

Change-Id: I2e1998557a3c8776e262c442fd758c25e17aff7a

Change-Id: I8f3f2642b02975fbdb14982984a29821f80d30d3

Use the function macro_block_yrd() to calculate error and distortion
in keeping with what is done for inter frames.

The old code was using a variance metric for once case and an
SSE function for measuring distortion in the other case.

The function vp8_encode_intra16x16mbyrd() is no longer used.

Change-Id: Ic228cb00a78ff637f4365b43f58fbe5a9273d36f

Change-Id: Ibd6e3bc82471839904b1086b499efc55f7c5cbaf

The code previously tested cpi->common.refresh_alt_ref_frame
but there are situations where this flag may be set for viewable frames.

The correct test should be !cm->show_frame.

Change-Id: Ia1a600622992a4a68fe1d38ac23bf6b34b133688

This commit also removes artificial RDMULT cap for low quantizers.
The intention is to address some abnormal behavior of mode selections
at the low quantizer end, where many macroblocks were coded with
SPLITMV with all partitions using same motion vector including (0,0).
This change improves the compression quality substantially for high
quality encodings in both PSNR and SSIM terms. Overall effect on
mid/low rate range is also positive for all metrics, but smaller
in magnitude.

Change-Id: I864b29c4bd9ff610d2545fa94a19cc7e80c02667

Commit 336aa0b7 incorrectly
declared current_pos as and int, when it should have been
a FIRSTPASS_STATS pointer.

Change-Id: I0a51c7a86ebba8546c95dd5d9d1c1143d4613e40

Adjust checking points in motion vector prediction to better cover
possible movements, and get a better prediction. Tests on test
clips showed a 0.1% improvement in SSIM, and no change in PSNR
and performance.

Change-Id: Ifdab05d35e10faea1445c61bb73debf888c9d2f8

previously wasn't guarded with ifdef ARMV7, causing a link error with
ARMV6

Change-Id: I0526858be0b5f49b2bf11e9090180b2a6c48926d

http://code.google.com/p/webm/issues/detail?id=262
Function was asuming that partitions have equal amount of mb_rows,
which is not always true.

Change-Id: I59ed40117fd408392a85c633beeb5340ed2f4b25

The old 2 pass code estimated error distribution when coding a
forced (by interval) key frame. The result of this was that in some
cases, when allocating bits at the GF group level within a KF
group there was either a glut of bits or starvation of bits at the end
of the KF group.

Added code to rescan and get the correct data once the position of
a forced key frame has been determined.

Change-Id: I0c811675ef3f9e4109d14bd049d7641682ffcf11

-For targets with external build systems like visual
studio CC is not set so check_add_cflags will fail.
Only call this function if extra_cflags is set.

Change-Id: I3531bad69e9b6a59c5be1b0e8b6053ccccbc332c

vp8cx_mb_init_quantizer was being called for every mode checked
in vp8_rd_pick_inter_mode.  zbin_extra is the only value that
really needs to be recalculated.  This calculation is disabled
when using the fast quantizer for mode selection.
This gave a small performance boost (~.5% to 1%).
Note: This needs to be verified with segmentation_enabled.

Change-Id: I62716a870b3c82b4a998bdf95130ff0b02106f1e