For real-time mode under cbr, this increases the gain (5-10%)
for speed 5 (none/little change for 6), on vc-clips.

Change-Id: I9b38beeb3c820de22c43a0ba53a9456168dd24ba

Turns off the DISABLE_RC_LONG_TERM_MEM macro and makes other changes
in the way the bits are updated, to make 2-pass rate control track
target bitrates closer.

Change-Id: I5f3be4b11c2908e6a9a9a1dd4fcf4e65531c44d8

Parameterize the frame level quantization index used in non-RD
coding flow with cbr.

Change-Id: I79cfbd9c32c0d0fc33ad720d2180432e910baf7a

This commit reduces the frequency of frames using finer quantizer
in non-RD coding flow, and slightly tune up the quantizer resolution
when used. It provides 1.7% compression gains in speed -5 at no speed
difference.

Change-Id: I430249a51260a841a0402666e5ec1566e4f7d5a6

Temporary revert.
Problems with conflicting definitions of type off_t
in MSVC builds that need resolving.

c:\Program Files (x86)\
  Microsoft Visual Studio 9.0\VC\include\wchar.h(479) :
  "error C2371: 'off_t' : redefinition; different basic types
c:\on2experimental\libvpx\tools_common.h(26) :
   see declaration of 'off_t'"

This reverts commit 92a4c591.

Change-Id: I535e40a18842a92e3e6e0b29e5fba66313010803

The new tolerance is a little higher than before (especially
for kf/gf/arf) so this change gives an encode speed up
for some clips up for speeds 0-2.

Change-Id: I63f7d6c9cc11c7f58742f41e250dcd3eab1741eb

Change-Id: I1d8c312a599db505a023e5cd0cc4ba2b8f696a2e

Change-Id: I4341d16ef83acd1cc9e55f7c5eff4af921bf57d4

Change-Id: I88e018442c527cf21eac791f0768e805dda244f1

This code/setting was actually not used (since speed features were not set on first frame,
until a recent change) and should be removed.

In CBR mode, the q value for the first frame can be controlled by setting
the target size via the parameters rc_buf_initial_sz (and max_intra_size_pct).

Change-Id: I65afc64972b36c449bd5a8c25800e65da5389066

Renames:
  mi_8x8 -> mi
  mode_info_stride -> mi_stride

Change-Id: I66f3e5fd1e7b7f46f108af5bb711c5fd9493c1be

Change-Id: I4de07d3ef81ebba759a983207d9ca768a65220a6

While encoding a frame, its last frame source can be used to give
acurate motion information. This patch prevents last frame to be
overwritten so that it is available during current frame encoding.

The last source is scaled when it is necessary. cpi->Last_Source
points to the last source frame.

Change-Id: I0e1ef5e9e1d2badf9d0c7a1a44a7ed5b24c09425

Change-Id: Ie2ea9dd8bd338cc9fe12ca9033df64f7644c68b3

Use a crude correction factor to correct for
lower compression efficiency at higher encode
speeds when estimating the max Q for the
clip.

Change-Id: I5ae377647f4adf5e91d700a8791fb3b8f70efc73

This fixes active map for non-rd realtime speeds.

Change-Id: I1bf416de3f7ef2e5dd2eabde052cce3c0683a52c

Change-Id: I879fcd3203c84fa83125e06662009d308bc2dbb6