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When aq=3 mode is on and the gf_cbr_boost is set: make sure golden frame
is always refreshed, and don't incorporate segement cost in qp setting
on the boosted golden frame.

Better performance on RTC set with gf_cbr_boost on,
for example with gf_cbr_boost=50, gains from ~0.5-3%.

Change-Id: Ie811f5e4d444ff3320bd6e2c1745b2c4c09a8460

Constraints on encoder config:
-target_bandwidth is no larger than 80% of level bitrate limit
-target_bandwidth * (1 + max_over_shoot_pct) is no larger than
88% of level bitrate limit
-min_gf_interval is no smaller than level limit
-tile_columns is no larger than level limit

Constraints on rate control:
-current frame size plus previous three frames' size is no larger
than the CPB level limit
-current frame size is no larger than 50%/40%/20% of the CPB
level limit if it's a key/alt-ref/other frame.

Change-Id: I84d1a2d6d6e3c82bfd533b3309ce999cfaba2c8b

The source sad could be used to copy the partition without going into
choose_partitioning function to speed up vp9 encoding. Computing source
sad takes little time. Speed test on Android and Linux shows little
encoding time gain (less than 1.4%).

Turned off for now since partition copy is turned off.

Change-Id: I61c9d5b8f22329760cb29a4ee30a7f9c232ce8d3

Add feature to copy partition from the last frame.
The copy is only done under certain conditions that SAD is below threshold.
Feature is currently disabled, until threshold is tuned.
Feature will be initially used for Speed 8 (ARM).

Under extreme case of always copying partition for speed 8:
Encode time is reduced by 5.4% on rtc_derf and 7.8% on rtc.
Overall PSNR reduced by 2.1 on rtc_derf and 0.968 on rtc.

Change-Id: I1bcab515af3088e4d60675758f72613c2d3dc7a5

This commit enables asymptotic closed-loop encoding decision for
the key frame and alternate reference frame. It follows the regular
rate control scheme, but leaves out additional iteration on the
updated frame level probability model. It is enabled for speed 0.

The compression performance is improved:

lowres 0.2%
midres 0.35%
hdres  0.4%

Change-Id: I905ffa057c9a1ef2e90ef87c9723a6cf7dbe67cb

Fixed formatting bug introduced by the fix to BUG=webm:1322
( Iedc4477aef1746aa0a4f84d88a1156296fd3ba87)

Change-Id: I715ee446c0e8584967ab87ba4e355759dd394187

Adjusts the q adjustement step depending on how far the
projected and target rates differ.

Change-Id: I498d03523ca233a270512ca3972c372daa4ca2a8

Fixes a case where recode is not triggered based on the value
of maxq passed into the recode loop test function.

BUG=b/32375284

Change-Id: I15ad985d0525c68e0443cfaf842440d2754b2266

This patch modified the motion search counts used in:
https://chromium-review.googlesource.com/#/c/305640/

These 2 counts were originally added as thread data, and used to
make decisions in motion search. The tile encoding order can be
inconsistent while using different number of threads, which can
cause bitstream mismatch. Here moved them to tile data to solve
the issue.

BUG=webm:1322

Change-Id: Iedc4477aef1746aa0a4f84d88a1156296fd3ba87

Re-use the tile worker threads to pack the bitstream in parallel
on a per-tile basis.  Restricting this to real-time only for now
(further testing is needed to ensure this does not make 2-pass
worse in any case).

BUG=webm:1309

Change-Id: I8a80da7c5089b837d0df79a5c49d5e3022dfc8ec

This reverts commit 9e8efa5b.

this change causes ubsan warnings, failures in
vpxenc_vp9_webm_rt_multithread_tiled

BUG=webm:1309

Change-Id: I020c7be985c771bfff4b3de1afe51cc8edb980da

Re-use the tile worker threads to pack the bitstream in parallel
on a per-tile basis.  Restricting this to real-time only for now
(further testing is needed to ensure this does not make 2-pass
worse in any case).

BUG=webm:1309

Change-Id: Ia2c982da56697756e12f02643f589189b3271d98

For 1 pass vbr real-time mode:
Allow for the usage of alt-ref frame when non-zero lag-in-frames is used.
Use non-filtered alt-ref, and select usage based on fast scene/content
analysis/detection within the lag of frames.

Positive gains on ytlive set: overall avgPSNR ~3-4%.
Several clips are up between 5-14%, a few clips are neutral/small change.

Current speed decrease is about ~5-10%.

Use the flag USE_ALTREF_FOR_ONE_PASS to enable this feature
(off by default for now).

Change-Id: I802d2bf3d44f9cf01f6d15c76be9c90192314769

change_config() may be called often in real-time application,
to update bitrate/framerate or qp-max/min.
No need to do update_frame_size() unless frame size has changed.

Change-Id: I23a51deade1e03adc91c468f9ffde3235298770c

Change-Id: I501597b7c1e0f0c7ae2aea3ee8073f0a641b3487

Change-Id: I21c8ad0b5ed7f8d843cae45c18f5727bceb8f859

This patch is to address concerns that changes to allow
recodes on the first frame in each ARF group do not give a
good enough speed quality trade off for speed 2. Though the
average impact  on encode speed is 1-2%, for some hard clips
it is > 5% rise.  For speed 1 this is less an issue and for Speed 0
the previous patch actually  improves speed.

Change-Id: Ie1bcefdbfdf846d3f4428590173f621465dffe3a

This corrects a formatting error introduced in:
I1e9d548ce445d29002f0c59ebfd3957a6f15e702
where spaces were used as delimiters instead of tabs.

The corresponding fix for vp10 is in
Ica3d625d6672b3c47e0e208b45eede29b9004030.

Change-Id: Ibc4eb8fd82e6b926ba259a679dc98557cadba9b1

Current commit is just an API template  for the rest of the code, and
I will add inner logic later.

Altref  frames  generate a  lot  of  bitrate  and  at the  same  time
other  frames  refer to  them  a  lot, so  it  makes  sense to  apply
special  compensation-based adaptive  quantization scheme  for altref
frames. E.g.,  for blocks  that are  good predictors  for the  future
apply rate-control  chosen quantizer  while for bad  predictors apply
worse one.

Change-Id: Iba3f8ec349470673b7249f6a125f6859336a47c8

Change-Id: If1ca3cf83e058317c9751d7da6caa7cd75eb6845

Allow recodes for the first inter frame in each arf group
even when the recode rule is set to ALLOW_RECODE_KFARFGF.

Small gains of 0.05%.

Change-Id: I40cb559d36a2bf0ebf5cf758c3f92e452b480577

quiets -Wshorten-64-to-32 warnings

Change-Id: Ice037acb675d1d81bfedf2dfcfa91a8a29a19dfd

Change-Id: I45d9fb4013f50766b24363a86365e8063e8954c2

This commit changes the call in vp9 encoder from vp9_deblock() to
vp9_post_proc_frame() to ensure the data structures used in the call
are properly allocated. This fixes an encoder crash when configured
with --enable-internal-stats.

Change-Id: I2393b336c0f566665336df4f1ba91c405eb56764

Allow usage of lookahead for VBR in real-time mode, for 1 pass vbr.

Current usage is for fast checking of future scene cuts/changes,
and adjusting rate control (gf interval and active_worst/target size).

Added unittests (datarate) for 1 pass vbr mode, with non-zero lag.

Added an experimental option to limit QP based on lookahead.

Overall positive gain in metrics on ytlive set:
avgPNSR/SSIM up on average ~1-3%; several clips up by 5, 7%.

Change-Id: I960d57dfc89de121c4824b9a9bf88d2814e74b56

Change-Id: I1954f9d6e33abff9081fe7a5cf59d5497768e0df

This change eliminates redundant computation in the two stage
downscaling, which saves ~1% encoding time in 3-layer svc encoding.

Change-Id: Ib4b218811b68499a740af1f9b7b5a5445e28d671

The deblocking filters used in vp8 have been moved to vpx_dsp for
use by both vp8 and vp9.

Change-Id: I5209d76edafc894b550f751fc76d3aa6799b392d

For forced key frames in particular this helps to make them
blend better with the surrounding frames where noise tends
to be suppressed by a combination of quantization and alt
ref filtering.

Currently disabled by default under and IFDEF flag pending
wider testing.

Change-Id: I971b5cc2b2a4b9e1f11fe06c67ef073f01b25056

Change-Id: I4aceffcdf7af59ffeb51984f0345c3a4c7e76a9f

Change-Id: I9afa02cae671bd3527cf344695e53d0cc767f549

BUG=webm:1219

Change-Id: I433a688fbbc87094afa888c1e7d49f3eefc0e765

Change-Id: I1ef3df0192491035728fe9d5eb25cc66dc2965de

Added actual and absolute rate miss values to the opsnr.stt
stats output line.

Changes to the borg graphing may be needed before merge.

Change-Id: I1e9d548ce445d29002f0c59ebfd3957a6f15e702

Add control API VP9E_SET_TARGET_LEVEL that allows the encoder to
control the output bitstream level and/or keep level related
statistics.

Usage:
               255         do not care about level (default)
               0           keep level related stats only
               10          target for level 1
               11          target for level 1.1
               .
               .
               .
               62          target for level 6.2

Usage for vpxenc:

--target-level=0/255/10/11...

Change-Id: I31d1aeca19358b893e7577b4e63748c8e614034a

And initialize a variable (avg_source_sad) that was not initialized to 0.

Change-Id: I63223e20fffe2a2ea38f03da62dad16af0618ea4

In Aq mode 1 the segment and AQ delta for each block is based
on spatial variance. There may be a net imbalance between blocks
that have lower Q than the baseline value and those that have higher Q.

This patch monitors that imbalance and extends the allowed baseline
Q range for the frame to accommodate adjustment of that baseline value
to compensate.

Change-Id: Iae8a48c7c01fe2af94a141e149d03acf467237ca

So it can be used even with aq-mode=3 not enabled.
Also cleans up some code in the places where its used.

No change in behavior.

Change-Id: Ib6b265308dbd483f691200da9a0be4da4b380dbc

Change recursive weight for average_source_sad and
put some constraint on spacing between detected scene-cuts.

Change only affects 1 pass real-time mode.

Change-Id: I1917e748d845e244812d11aec2a9d755372ec182

Avoid copy-block when denoising is at LowLow level (i.e., no denoising is done).
Instead, don't enter denoiser at all, and when level goes back up over kLowLow
do a reset in denoiser.

Change-Id: I0544adf58f4dd51ecc4a4607fcb0353bfbbb7a59