To experiment with different speed/quality compromises.

Change-Id: Ia9d4b85243554d620498a327da37c356e752b07f

Encoding screen content exercises various fast skip paths that are
missed by natural video content.

Change-Id: Ie359884ef9be89cbe5dda6d82f1f79360604a090

Change-Id: Ib94ee638eb486f1368f2e3098d25c1d3d28fc265

This patch checks that a decoder never tries to reference frame that's
outside the range of 2x to 1/16th the size of this frame.  Any attempt
to do so causes a failure.

Change-Id: I5c98fa7bb95ac4f29146f29dd92b62fe96164e4c

Set the proper number of mb_rows/cols.
Also remove warnings (unused variable) when configured with temporal-denoising disabled.

Change-Id: I8abd2372394ee55295feb87a66efd294ea6989d0

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

Fixed reported vs warnings/errors.

Change-Id: Ia4c44d64a69dbd9e1738c6ebb48be29582b7e1d3

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

Change-Id: I33e8d1788ce29ffc695f7e9b84167ef446b1b56c

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

C version and sse2 version, and off by default.
For the test clip used, the sse2 performance improved by ~5.6%

Change-Id: Ic2d815968849db51b9d62085d7a490d0e01574f6

Change-Id: I251cca45db54d2947868e2b9c35cb54f86b10706

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