Fix return values for webm_read_frame so that we can distinguish between
error and end of stream. 0 - Success, 1 - End of stream, -1 error.

Change-Id: Ic35d0c7d7a166e027711a3d2300ecdda25a5d0cc

A previous path improved speed 2 quality a little but
more extensive testing showed that it slowed encode
by a few %.

The change will have a similar effect for speed 3 but
should not impact speeds 4+;

This experiment should reverse that and give a speed
up at the cost of a small quality loss.

Borg results pending.

Change-Id: I4493fc1541aaf44587f1a41ff219f7088da9252c

vp9/encoder/vp9_rdopt.c:3913:44: runtime error: index -1 out of bounds for
type 'RefBuffer [3]'.

Change-Id: Ic0ec755328853b359e3a1ee84d319589183e38b7

Both values are already checked as command line arguments:
RANGE_CHECK_HI(cfg, g_lag_in_frames, MAX_LAG_BUFFERS);
RANGE_CHECK_HI(extra_cfg, sharpness, 7);

Change-Id: I584798d587152d88dfd517c210054b466f4e5f8a

Change-Id: I258351fc1fff70ff2e9fa4845e575b0bb6a423d1

Change-Id: I84af62cc52954fc2eaf0b737245be76551fc8005

Change-Id: I5c450a4932fb4f20449487596932458ee3b48ae0

Change-Id: Ie0c905b6f32a37e4360bbb44ceeae77c42ad1dc5

Change-Id: I19a197b9525172579f253702c77fa76af88f6565

With a more approriate one vp9_setup_src_planes() as only src buffer
pointers need to be initialized here.

Change-Id: I40fac4d8b2d39eb7d0c65b9b6afab45138a13936

matches the project name and doesn't share a media file extension

Change-Id: I9ad6c0a180e36c41f8fc49120615a070ea792a30

Change-Id: Ibec06411c8cd843c2ca33b528a511a656e551983

Change-Id: I2d1b5c1481aefe226082e1f096ca9edd340d4d31

Change-Id: Idb1289aa0eadff8f75dcf995547ab3a1b9e27375

Change-Id: If0e9c811c8ae78c0914d615bad0067a5b57e4a71

Change-Id: Id81a76d18be6b2de69f81bb563d74c3bb356d434

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: I1020dec1ac2e9404a8efcc04681a050417b8b065