When the frame is intra coded only, the encoder takes the RD
coding flow. Hence the function set_mode_info is not practically
in use. This commit removes it and the associated conditional
branches.

Change-Id: I1e42659ceb55b771ba712d1cdecacb446aa6460d

For real time speed 7, once encode breakout is on(i.e. encoding
setting --static-thresh=1), a proper encode breakout threshold
is set to speed up the encoder.

Set --static-thresh=1, RTC set borg test showed a slight overall
psnr loss of 0.162%, but ssim gain of 0.287%. The average speedup
on RTC set is 6%, and for some clips, the speedup can be 10+%.

Change-Id: Id522d9ce779ff7c699936d13d0c47083de4afb85

Before encoding a frame, calculate and store each 16x16 block's
variance of source difference between last and current frame.
Find partitioning threshold T for the frame from its variance
histogram, and then use T to make partition decisions.

Comparing with fixed 16x16 partitioning, rtc set test showed an
overall psnr gain of 3.242%, and ssim gain of 3.751%. The best
psnr gain is 8.653%.

The overall encoding speed didn't change much. It got faster for
some clips(for example, 12% speedup for vidyo1), and a little
slower for others.

Also, a minor modification was made in datarate unit test.

Change-Id: Ie290743aa3814e83607b93831b667a2a49d0932c

Change-Id: I7f989d197444d166133ad91eb23ac1033109f58d

As a way to speed-up rtc encoding at speed 7.

Change-Id: Ie36a010392cf7b741dc130df21a4e733622a75b7

To experiment with different speed/quality compromises.

Change-Id: Ia9d4b85243554d620498a327da37c356e752b07f

Change-Id: Iee21eb0ecc5a1fe2c56fb3df0cee0ead6d139ed1

Bug introduced in I930dced169c9d53f8044d2754a04332138347409. If
svc.number_temporal_layers == 1 and svc.number_spatial_layers == 1, the system
attempt to do spatial SVC. It no longer does that.

Change-Id: Ie6b130a72b1eea40c547c9a64447e40695f811c5

Also added reset_frame_stats()

Change-Id: I8e6ca00dbd5fa85cd39485d81c9343c0ff207d6c

For the primary arf in a group, if multiple arfs
are enabled and we were using arfs in the previous
group, then allow the second arf from the previous
group to be used as an additional reference.

Change-Id: Iaf41706a52f54ef21548026851cd77100d6aebda

This commit enables an adaptive transform size selection method
for speed -6. It uses largest transform size when the sse is more
than 4 times of variance, i.e., most energy is compacted in the
DC coefficient. Otherwise, use the default TX_8X8. It improves
the compression efficiency for rtc set of speed -6 by 0.8%, no
speed change observed.

Change-Id: Ie6ed1e728ff7bf88ebe940a60811361cdd19969c

Change-Id: Ic149749157d762039446d14472d40d9211c6451a

This patch allows the encoder to skip the partition search for the
frame if it is an inter frame and only zero motion vectors have
been detected in the first pass. The partition size is directly
assigned according to the difference variance.

Borg tests show overall little performance changes in term of PSNR
(derf -0.027%, yt 0.152%, hd 0.078%, stdhd 0%). The worst case of
PSNR loss is -0.514% from yt. The best PSNR gain is 4.293% from yt.
The second pass encoding speedup for slideshow clips is 15%-40%.

Change-Id: I881f347d286553ee5594a9ea09ba1a61ac684045

This commit enables a fast reference motion vector search scheme.
It checks the nearest top and left neighboring blocks to decide the
most probable predicted motion vector. If it finds the two have
the same motion vectors, it then skip finding exterior range for
the second most probable motion vector, and correspondingly skips
the check for NEARMV.

The runtime of speed -5 goes down
pedestrian at 1080p 29377 ms -> 27783 ms
vidyo at 720p       11830 ms -> 10990 ms
i.e., 6%-8% speed-up.

For rtc set, the compression performance
goes down by about -1.3% for both speed -5 and -6.

Change-Id: I2a7794fa99734f739f8b30519ad4dfd511ab91a5

Change-Id: I65209fd1e06fc06833f6647cb028b414391a7017

Bug introduced during multiple iterations on: I3831*

gf_group->arf_update_idx[] cannot currently be used
to select the arf buffer index if buffer flipping on overlays
is enabled (still currently the case when multi arf OFF).

Change-Id: I4ce9ea08f1dd03ac3ad8b3e27375a91ee1d964dc

This commit fixes the potential issue in the non-RD mode decision
flow that only checks part of the block to estimate the cost. It
was due to the use of fixed transform size, in replacing the
largest transform block size. This commit enables per transform
block cost estimation of the intra prediction mode in the non-RD
mode decision.

Change-Id: I14ff92065e193e3e731c2bbf7ec89db676f1e132

Cosmetic patch only in response to comments on
previous patches suggesting a couple of name changes
for consistency and clarity.

Change-Id: Ida3a359b0d5755345660d304a7697a3a3686b2a3

This is very helpful for large moving windows in screencasts.

Change-Id: I91b5f9acb133281ee85ccd8f843e6bae5cadefca

This commit replaces a few use cases of cpi->common with preset
variable cm, to avoid unnecessary pointer fetch in the non-RD
coding mode.

Change-Id: I4038f1c1a47373b8fd7bc5d69af61346103702f6

Make these two functions accessible by both RD and non-RD coding
modes.

Change-Id: Iecb39dbf3d65436286ea3c7ffaa9920d0b3aff85

Change-Id: Ia6bcdaf5a5b80e68176f60d8d00e9b5cf3f9bfe3

Change-Id: I930dced169c9d53f8044d2754a04332138347409

In real-time speed 6, no partition search is done. The inter
prediction results got from picking mode can be reused in the
following encoding process. A speed feature reuse_inter_pred_sby
is added to only enable the resue in speed 6.

This patch doesn't change encoding result. RTC set tests showed
that the encoding speed gain is 2% - 5%.

Change-Id: I3884780f64ef95dd8be10562926542528713b92c

There is a normative scaling range of (x1/2, x16)
for VP9. This patch fixes the maximum downscaling
tests that are applied in the convolve function.

The code used a maximum downscaling limit of x1/5
for historic reasons related to the scalable
coding work. Since the downsampling in this
application is non-normative it will revert to
using a separate non-normative scaler.

Change-Id: Ide80ed712cee82fe5cb3c55076ac428295a6019f

Add indirection to the section of buffer indices.
This is to help simplify things in the future if we
have other codec features that switch indices.

Limit the max GF interval for static sections to fit
the gf_group structures.

Change-Id: I38310daaf23fd906004c0e8ee3e99e15570f84cb

Adjust enforced minimum arf Q deltas for non primary arfs
in the middle of an arf/gf group.

Change-Id: Ie8034ffb3ac00f887d74ae1586d4cac91d6cace2

Add multi_arf_allowed flag.
Re-initialize buffer indices every kf.
Add some const indicators.

Change-Id: If86c39153517c427182691d2d4d4b7e90594be71

Fix some bugs relating to the use of buffers
in the overlay frames.

Fix bug where a mid sequence overlay was
propagating large partition and transform sizes into
the subsequent frame because of :-
  sf->last_partitioning_redo_frequency  > 1 and
  sf->tx_size_search_method == USE_LARGESTALL

Change-Id: Ibf9ef39a5a5150f8cbdd2c9275abb0316c67873a

Remove the old experimental multi arf code that was under
the flag CONFIG_MULTIPLE_ARF.

Change-Id: Ib24865abc11691d6ac8cb0434ada1da674368a61

This patch implements a mechanism for inserting a second
arf at the mid position of arf groups.

It is currently disabled by default using the flag multi_arf_enabled.

Results are currently down somewhat in initial testing if
multi-arf is enabled. Most of the loss is attributable to the
fact that code to preserve the previous golden frame
(in the arf buffer) in cases where we are coding an overlay
frame, is currently disabled in the multi-arf case.

Change-Id: I1d777318ca09f147db2e8c86d7315fe86168c865

The encoder currently allocates frame buffers before
it establishes what the chroma sub-sampling factor is,
always allocating based on the 4:4:4 format.

This patch detects the chroma format as early as
possible allowing the encoder to allocate buffers of
the correct size.

Future patches will change the encoder to allocate
frame buffers on demand to further reduce the memory
profile of the encoder and rationalize the buffer
management in the encoder and decoder.

Change-Id: Ifd41dd96e67d0011719ba40fada0bae74f3a0d57

Change-Id: Ibb841a1fa4d08d164cf5461246ec290f582b1f80

Change-Id: I549868725b789f0f4f89828005a65972c20df888

Copy split from macroblock to pick mode context so it doesn't get lost.

Change-Id: Ie37aa12558dbe65c4f8076cf808250fffb7f27a8

Now copies the src to the correct location in the running average buffer.

Change-Id: I9c83c96dc7a97f42c8df16ab4a9f18b733181f34

s/stdint.h/vpx\/vpx_int.h

Added missing 'break;'s

Also included other minor changes, mostly cosmetic.

Change-Id: I852bba3e85e794f1d4af854c45c16a23a787e6a3

This commit allows the key frame to search through more prediction
modes and more flexible block sizes. No speed change observed. The
coding performance for rtc set is improved by 1.7% for speed -5 and
3.0% for speed -6.

Change-Id: Ifd1bc28558017851b210b4004f2d80838938bcc5

Change-Id: Iab9b4e11cad927f3282e486c203564e1a658f377

Change-Id: I1216f17e2206ef521fe219b6d72d8e41d1ba1147