left_block_mv and above_block_mv will return the MB
motion vector for non SPLITMV macro blocks.

Change-Id: I58dbd7833b4fdcd44b6b72e98ec732c93c2ce4f4

Currently, hex search couldn't guarantee the motion vector(MV)
found is within the limit of maximum MV. Therefore, very large
motion vectors resulted from big motion in the video could cause
encoding artifacts. This change adjusted hex search bounds
checking to make sure the resulted motion vector won't go out
of the range. James Berry, thank you for finding the bug.

Change-Id: If2c55edd9019e72444ad9b4b8688969eef610c55

Declared the bmi in BLOCKD as a union instead of B_MODE_INFO.
Then removed B_MODE_INFO completely.

Change-Id: Ieb7469899e265892c66f7aeac87b7f2bf38e7a67

This is basically a slightly modified version of the previous patch,
and it has a moderately positive effect (SSIM/PSNR both +0.08% avg
on derf-set). Most clips show no change, except waterfall/coastguard,
each ~ +0.8% SSIM/PSNR. You can see similar effects in other clips
by shortening their length to terminate at a very short last group
of frames.

Change-Id: I7a70de99ca1f9fe6a8b6ca7a6e30e8a4b64383e4

this commit makes the usage errorperbit and sadperbit consistent for
encoding modes and passes. Removed all different magic weight factors
associated with errorperbit. Now 1/2 is used for both sadperbit16 and
sadperbit4, the /2 operation is merged into initializations of the 2
variables.

Tests on cif set show .23%, 0.18% and 0.19% gain by avg psnr, overall
psnr and ssim respectively.

Change-Id: Ifa285c3e065ce0a5a77addfc9f95aabf54ee270d

The fb_idx_ref_cnt book-keeping was in error. Added an assert to
prevent future errors in the reference count vector. Also fixed a
pointer syntax error.

Change-Id: I563081090c78702d82199e407df4ecc93da6f349

Change-Id: Iccbd78d91c3071b16fb3b2911523a22092652ecd

sad_per_bit has been used for a number of motion vector search routines
with different magic weights: 1, 1/2 and 1/4. This commit remove these
magic numbers and use 1/2 for all motion search routines, also reformat
a number of source code lines to within 80 column limit.

Test on cif set shows overall effect is neutral on all metrics. <=0.01%

Change-Id: I8a382821fa4cffc9c0acf8e8431435a03df74885

vp8_fast_quantize_b_pair_neon function added to quantize
two adjacent blocks at the same time to improve performance.
 - Additional 3-6% speedup compared to neon optimized fast
   quantizer (Tanya VGA@30fps, 1Mbps stream, cpu-used=-5..-16)

Change-Id: I3fcbf141e5d05e9118c38ca37310458afbabaa4e

Small code cleanups before attempting to reduce the size
of bmi found in BLOCKD.

Change-Id: Ie9c14adb53afd847716a75bcce067d0e6c04f225

Misplaced #endif caused first_time_stamp_ever to only be initialized if
CONFIG_INTERNAL_STATS was set.

Change-Id: I2296a4ab00f7dfb767583edcc5d59b94f48c0621

Added preload instructions to armv6 encoder optimizations.
About 5% average speed-up on Tegra2 for VGA@30fps sequence.

Change-Id: I41d74737720fb71ce7a316f07555357822f3347e

in onyx_if.c update_reference_frames() make
sure that frame buffer indexes are not equal
before preforming a buffer copy.  If two frames
share the same buffer the flags will already be
set correctly.

Change-Id: Ida9b5516d08e3435c90f131d2dc19d842cfb536e

Test showed using hex search in realtime mode largely speed up
encoding process, and still achieves similar quality like the
diamond search we have. Therefore, removed the diamond search
option.

Change-Id: I975767d0ec0539f9f6ed7fdfc09506e39761b66c

Hex search is not called in rdopt.c

Change-Id: I67347f03e13684147a7c77fb9e9147e440bb5e8e

This patch fixes the compiler errors and the seg fault
when running decode_with_partial_drops.

Change-Id: I7c75369e2fef81d53b790d5dabc327218216838b

error_per_bit and sad_per_bit were designed as estimates of a bit worth
of sum squared error and sum absolute difference respectively. Under
this assumption, error_per_bit should be used in combination with 2nd
order errors (variance or sum squared error) while sad_per_bit should
be used in combination with 1st order SADs in motion estimation. There
were a few places where sad_per_bit has been misused with variances,
this commit changes to use error_per_bit for those places, also changes
parameter names to properly indicate which constant is being used.

On cif set, the change has a universal gain by all metrics: 0.13% by
average/overall psnr and 0.1% by ssim.

Change-Id: I4850fdcc3fd6886b30f784bd843f13dd401215fb

Change-Id: I6e5e86235d341cce3b02abda26dbeb71940ed955

Minor modification.

Change-Id: I09511d38fd1451d5c4106a48acdb3f766ce59cb7

  'sum' returned by get8x8var is not used and var8x8 has optimizations
  for more platforms.

Change-Id: I4a907fb1a05f285669fb0b95dc71d42182c980f6

While profile=3, there is no sub-pixel search. Distortion and SSE
have to calculated using get_inter_mbpred_error().

Change-Id: Ifb36e17eef7750af93efa7d0e2870142ef540184

Less operations.

Change-Id: Ibb9cd5ae66b8c7c681c9a654d551c8729c31c3ae

Change-Id: I6e5e921f03dc15a72da89a457848d519647677a3

Declared the bmi in MODE_INFO as a union instead of B_MODE_INFO.
This reduced the memory footprint by 518,400 bytes for 1080
resolutions.  The decoder performance improved by ~4% for the
clip used and the encoder showed very small improvements. (0.5%)
This reduction was first mentioned to me by John K. and in a
later discussion by Yaowu.
This is WIP.

Change-Id: I8e175fdbc46d28c35277302a04bee4540efc8d29

In vp8dx_set_reference, the new reference image is written to an
unused reference frame buffer.

Change-Id: I9e4f2cef5a011094bb7ce7b2719cbfe096a773e8

Reduced some bound checks in hex search function.

Change-Id: Ie5f73a6c227590341c960a74dc508cff80f8aa06

VP8_UVSSE mistakenly used subpixvar8x8 to calculate SSE for non-subpixl
motion cases.

Change-Id: I4a5398bb9ef39c211039f6af4540546d4972e6a9

Change-Id: Ia96e5bf915e4d3c0ac9c1795114bd9e5dd07327a

also remove 2 #defines and 1 function declaration that are not in use.

Change-Id: I8f743d0e3dd9ebf1de24a8b0c30ff09f29b00c53

fixed a bug where active_worst_quality could be set
below active_best_quality which could result in an
infinite loop.

Change-Id: I93c229c3bc5bff2a82b4c33f41f8acf4dd194039

This patch collects the twopass specific memebers of VP8_COMP into a
dedicated struct. This is a first step towards isolating the two pass
rate control and aids readability by decorating these variables with
the 'twopass.' namespace. This makes it clear to the reader in what
contexts the variable will be valid, and is a hint that a section of
code might be a good candidate to move to firstpass.c in later
refactoring. There likely will be other rate control modes that need
their own specific data as well.

This notation is probably overly verbose in firstpass.c, so an
alternative would be to access this struct through a pointer like
'rc->' instead of 'cpi->firstpass.' in that file. Feel free to make
a review comment to that effect if you prefer.

Change-Id: I0ab8254647cb4b493a77c16b5d236d0d4a94ca4d

Various members that were either completely unreferenced or written
and not read.

Change-Id: Ie41ebac0ff0364a76f287586e4fe09a68907806e

The partition_info struct contains info just for SPLITMV,
so it should be used instead of BLOCKD.  Eventually, I want
to reduce the size of B_MODE_INFO struct found in BLOCKD, so
this is the first step toward that goal.
Also, since SPLITMV is not supported in vp8_pick_inter_mode(),
the unnecessary mem copies and checks were removed.  For rt
encodes, this gave a slight performance improvement.

Change-Id: I5585c98fa9d5acbde1c7e0f452a01d9ecc080574

Missed wrapping one function call in #if CONFIG_ERROR_CONCEALMENT.

Change-Id: I5746b1e6e4531670dbed1130467331fe309bdcae

The error-concealer is plugged in after any motion vectors have been
decoded. It tries to estimate any missing motion vectors from the
motion vectors of the previous frame. Intra blocks with missing
residual are replaced with inter blocks with estimated motion vectors.

This feature was developed in a separate sandbox
(sandbox/holmer/error-concealment).

Change-Id: I5c8917b031078d79dbafd90f6006680e84a23412

These don't need extern linkage.

Change-Id: I21220ada926380a75ff654f24df84376ccc49323

Group related functions together.

Change-Id: I92fd779225b75a7204650f1decb713142c655d71

rvct 4.1 was complaining about vstmia.16, store multiple expects 64 data type.
optimized the implementation.

Change-Id: I0701052cabd685c375637bbc3796ff6d88f5972c

Scott fixed the bug in MV clamping function in encoder, which
could cause artifacts.

Change-Id: Id05f2794c43c31cdd45e66179c8811f3ee452cb9

Moved MVcount modification in pick_inter_mode, and eliminated
calling of vp8_find_near_mvs.

Change-Id: Icd47448a1dfc8fdf526f86757d0e5a7f218cb5e8