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[spatial svc]Enabl golden frame for base layer and fix wrong ref_frame_flag for upper layers in first frame

Change-Id: I1fec9c084b499b2f445b79726066d01b136b59fa

1. Remove last reference flag for first frame upper layers in one pass mode.
2. Disable refresh golden frame flag for key frames.

Change-Id: I44ac1bd2c795169e4fbfdd078ea79a1d33a204d6

All changes are for spatial svc only.
1. Enable encoding hidden frames in each layer and use alt reference idex to reference the hidden frame in each layer
2. Use golden reference idx for spatial reference
3. For those layers that don't have hidden frames (caused by lack of frame buffers), reference a hidden frame in lower layers
4. Add "auto-alt-refs" in svc options
Change-Id: Idf27d1fd2fb5f3ffd9e86d2119235e3dad36c178

Change-Id: I53db06acf5bc434f9584136b848322f5870300b3

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

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

Both enums are identical.
Change-Id: I06653f9c90a2d3a2dd5c741e75b17ee7d066a56f

Change-Id: I54cdb4ce11590511e6f86bc2fd55771f1c18a20a

Produces sane qindex for the first frame in 1-pass constant and
constrained qualirty modes.

Change-Id: Ib2a5091df15a23489e9bb5534a2019cf2689755e

The third array element was unused. 2 elements now: key- and interframe.

Change-Id: I5b8b9f5d889cc96a204cedfc432059293256298e

Change-Id: Ib35ff854378764dc3c6745844c67a33dee545663

Change-Id: I89a1dbea39c50c7633f746d9c93fec3a289f1b42

Change-Id: I2c6950e7d79fc89c6f97e6dcf47317ef66c453a5

Initializes total_actual_bits and total_target_bits to 0

Change-Id: Ia50d3bf5df765146a44aa1f6045e73367ccf50df

Change-Id: I4bd635949240880ced5f581c24e981ccd0374e40

If we are already saving a lot in bits from the target (maximum)
bitrate in the constrained quality mode, allow the quantizer
to go lower than the cq level. This hopefully will solve issues
with getting too low a bitrate and consequently poor quality for
certain videos in cq mode.

Change-Id: I1c4e8b0171fcf58f95198b3add85eea5f3c8f19f

Change-Id: I7ca46fa26acd80a21210cb8d9584ad812cb995bf

Allow slightly larger minq-maxq range for P frames. This improves
the compression performance of speed -5 for rtc set by 2.7% in psnr.

Change-Id: I438653d52d0fe51111509c6092e2334bac2de0cf

tx_mode supercedes whatever mechanism is used to push for 16x16
allowing for the use of the 4x4 transform.

Change-Id: I6c3f05ab9fe52050e40cc6303de9334653763289

Merged minq tables for arf and gf cases.
These tables were almost the same and for
VBR the arf table was not used at all.

Change-Id: Ie3c87e91dab613cf06f6945ac1ace0e0e4213d34

Small adjustment to the active Q range calculations.
These changes should slightly extend the available Q range
for KF/GF/ARF and narrow it for other frames.

The results for this change in isolation are broadly positive
for SSIM and average PSNR and slightly up but mixed for opsnr.

derf +0.293% opsnr, +1.286% SSIM
std-hd + 0.528% opsnr, + 1.746% SSIM
yt +0.056% opsnr, +0.457% SSIM
yt-hd -0.147% opsnr, + 0.226% SSIM

Change-Id: If065280342027ecc5d44b49fc1d440dfef041002

Change-Id: I62ab0f4346b4157a90dc5b5f73ab5e597d69c1bd

Change-Id: Id6ab59e505be28cd4eb9f1fe114feb47debe0539

Change-Id: I7cc6f441f414ca1b4d95dad3f789fff6faf8c3c4

This member of VP9_COMP seemed unnecessary since it
only shadowed VP9EncoderConfig.key_freq that is
accessible through VP9_COMP.

Change-Id: Ib751bb1cf1b0b3c50a2a527d7c34f6829dd6fee3

The end_useage parameter  is confusingly named since it
now actually defines the rate control method used.

Change-Id: I98912caabfe556b7af0b939a645d1336409e4d71

Change-Id: Id48edd12c6f649c82113128491ef6ea7410e93b2

Use cq_level (which is identical) from VP9_CONFIG instead.

Change-Id: I1aaf2fcef3d2dbd4577f613d27693ff8a68989fd

To make direct side by side testing this patch combines two
VBR corrections schemes to allow more direct side by side testing.
(The other patch was by Debargha chg id I0cd1f7...)

Change-Id: I271c45e5c4ccf8de8305589000218b80d9dc3a25

Add code to monitor over and under spend and
apply limited correction to the data rate of subsequent
frames. To prevent the problem of starvation or overspend
on individual frames (especially near the end of a clip) the
maximum adjustment on a single frame is limited to a %
of its un-modified allocation.

Change-Id: I6e1ca035ab8afb0c98eac4392115d0752d9cbd7f

Fix rate control bug whereby the rate factor heuristics
were being updated on arf overlays causing a rate surge
for a few frames followed by a corrective drop.

This fix eliminates many of the overshoot problems that
we were seeing on hard clips (even without applying
stricter vbr rate control) and also helps quality on
almost all clips with some hard clips improving by >5%.

Overall quality results measured at speed 2.
Derf  +1.78% opsnr , +2.44% SSIM
Stdhd +2.41% opsnr, +2.85% SSIM

Change-Id: I2369df6295c2705963fa6307877f6acb304bcc39

Just to be consistent with min_frame_bandwidth & max_frame_bandwidth names.

Change-Id: I36702c708cba9ad1a5c36393f37758a2edeadb90

Change-Id: Ie0c905b6f32a37e4360bbb44ceeae77c42ad1dc5

Change-Id: Idb1289aa0eadff8f75dcf995547ab3a1b9e27375

This increases the range of Q values available to
normal inter frames to allow encoder a better chance
to hit the target rate.

Change-Id: I33cd96469a46577fdcea631e26d3355710909e6d

The limits applied under the flag
"LIMIT_QRANGE_FOR_ALTREF_AND_KEY"
behaved in an undesirable way if the gap between
active_worst_quality and active_best_quality was
changed.

In this patch, the adjustment is made using the
vp9_compute_qdelta_by_rate() function and fixed
rate multiplier values. Hence it is not impacted by
the relative value of active_best_quality.

Change-Id: I93b3308e04ade1e4eb5af63edf64f91cd3700249

Change-Id: Ib00a694b9cf8e0c276dfefddab8cb36b8693e022

And change a parameter setting in vpx_temporal_scalable_patterns.

Change-Id: I7c208296ebcecbc8f73de032f6cdb26a1fc1442b