Yaowu Xu [Thu, 27 Mar 2014 19:54:06 +0000 (12:54 -0700)]
[BITSTREAM]Fix the scaling calculation
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
Yaowu Xu [Wed, 26 Mar 2014 23:15:00 +0000 (16:15 -0700)]
Adjust rt speed steps.
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.
Paul Wilkins [Mon, 24 Mar 2014 18:11:47 +0000 (18:11 +0000)]
Further speed trade off adjustments.
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.
Paul Wilkins [Fri, 21 Mar 2014 16:14:46 +0000 (16:14 +0000)]
Experimental change to speed 1 settings.
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.
Marco Paniconi [Thu, 27 Mar 2014 01:09:20 +0000 (18:09 -0700)]
aq_mode=3: Set target seg_map in sb-block order.
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.
Jingning Han [Wed, 26 Mar 2014 20:00:06 +0000 (13:00 -0700)]
Motion referenced partition search for non-RD coding flow
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.
Jingning Han [Tue, 25 Mar 2014 18:05:50 +0000 (11:05 -0700)]
Apply early termination in non-RD partition search
This commit allows the recursive non-RD partition search to early
terminate sub search tree when the cumulative rate-distortion is
already above the best available.
Yaowu Xu [Tue, 25 Mar 2014 21:27:45 +0000 (14:27 -0700)]
Added a speed feature "allow_skip_recode"
This commit added a speed feature to make the logic of calculating
skip_recode on a block level more explicit. This also enable the
feature to be enabled at speed 5 where the previous logic is too
conservative, help gain back the lost speed for --rt(-5).
Jingning Han [Tue, 25 Mar 2014 16:54:32 +0000 (09:54 -0700)]
Fix compiling errors due to git merge
There were a few conflicts between the new non-RD partition search
and recent clean-up patches, which were not caught by git control.
This commit fixed these issues.
Jingning Han [Tue, 25 Mar 2014 05:31:03 +0000 (22:31 -0700)]
Always use adaptive motion search in non-RD coding mode
This commit takes out the if statements on using adaptive motion
search flag. This feature is automatically enabled in non-RD mode
decision flow for variable partition types search.
Yunqing Wang [Mon, 24 Mar 2014 21:54:25 +0000 (14:54 -0700)]
Fix uninitialized read in postprocessing
This patch fixed WebRTC Issue 3020: "Uninit error at
vp8_mbpost_proc_down_xmm". The first 8 values in d were not initialized,
but was accessed. This patch fixed c code as well as mmx and sse2 code.
Jingning Han [Fri, 21 Mar 2014 18:05:39 +0000 (11:05 -0700)]
Enable recursive partition selection for non-RD coding mode
This commit enables a recursive partition type search for non-RD
mode decisions. It allows the encoder to choose variable block
sizes in a 64x64 block based on rate-distortion modeling.
It improves speed -6 coding efficiency for rtc set by 2.4%. Most
of the gains come from 32-40dB range, where many sequences gain
about 5% to 20%. Local tests suggest there is no speed change.
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