Change-Id: I879fcd3203c84fa83125e06662009d308bc2dbb6

For very large size video image, the scaling calculation may need use
value beyond the range of int. This commit upgrade the value to 64bit
to make sure the calculation do not wrap around INT_MAX.

The change corrected the decoder behavior.

The bug affects only very large resolution video because the scaling
calculation was sufficient for image size smaller than 2^13.

This resolves issue:
https://code.google.com/p/webm/issues/detail?id=750

Change-Id: I2d2ed303ca6482f31f819f3c07d6d3e98ef3adc5

This commit adjusted the speed steps in rt mode to make the steps
more evenly spaced on speed and quality, specifically:
1. Merged 3 and 4 into one single step 3 and removed confilicting
features.
2. Move 8, 7, 6, 5 to be 7, 6, 5, 4 repsectively.

Change-Id: I38d56d61531f3561d772aef953c411c8fb38c063

Root cause is the different default register length between x86
and x64 platform. Change spatial_layer_id to long long.

Change-Id: If1a5972365c7a59f7e76cb4fd714610f3d48a8ff

Change-Id: I366850015004644c4fc7feabe27a782fdd8d8718

Change-Id: I3e20c0cdb9d2437bddf21afb255855f2dead8e02

Change-Id: I7d9874da8ff78a2d7e0cf11073af9c30538bc9a6

Change-Id: I0abf4401b37e2f786a958c8eb0fb40640f7fc140

Root cause is number of spatial layers is set through
parse_options() when running from ffmpeg.

Change-Id: Icd79cd13fd76e8712150d803838a33fee9117dcb

Change-Id: If67ed8721f258883e41bab18f5c456505de68785

Change-Id: I742b0f26b7d735e75c3653a3e52bd4f4fc198d3d

Change-Id: Ia6b1e3c5a8ac21219bbfe9eecdb4801f3eaa10e5

Change-Id: Ib09eedc17ea0ea2eec75d78112e4786d98f382aa

Properly obtain and buffer the segment_id in non-RD mode information
update process.

Change-Id: I43230001872f6a986d12c0d94e98fdec0db3be2c

Small speed gain for speed 1.

Quality is generally a little up for speed 2.

Speed 3 was similar to speed 4 but now positioned more
evenly between 2 and 4 speed and quality wise.
   (opsnr +5.6% ssim +8.25% across all sets)

Speed 4 is a little slower than before but sizable quality gains.
   (opsnr +3.7% ssim +6.8% across all sets)

The code has been cleaned up a bit so that for each incremental
speed step changes over the previous speed step are applied.
This makes it easier to see what is changing from one setting to
the next.

Change-Id: I2d98d0d6230af23486adaec01908f58942a7cdeb

Allow tx search for ARF and GF helps quality but a little slower.
Setting subpel_iters_per_step to 1 improves encode speed.
Setting sf->mode_skip_start = 10 improves speed.

Initial local results suggest overall impact on quality is neutral
but encode is up to 15% faster.

Change-Id: Ibde02cae6626a44c10a1da0cefe888afbb51f037

Change-Id: I64a81601d11e9fa383435bfd1a1d35206ebb2fc8

Removes a TODO. Changed meaning of some parameters
(target-max-percent refresh and starting index) to be
defined relative to superblock. Also, modify turn-off condition.

Change-Id: I5e55f372b7079c24f9cdac0b06fa34620dbf456b

Change-Id: Iffa45b9b04196c1ded6037622a8644a2500a62de

This commit enables the non-RD mode decision coding flow to
adaptively apply partition search in non-refresh frame, when the
collocated block in previous frame suggests there might be a motion
activity. It refactors the update_state_rt() function to support
buffer swap of mode_info struct, thereby unifying the encoding
stage across various non-RD coding modes.

It provides 5% compression performance gains in speed -6 for rtc
test set, at about 12% speed slow down.

Change-Id: Iefa374aed5a11c4b7ff9a3ed36a98ea8bd184edb