Johann [Tue, 4 Nov 2014 18:46:24 +0000 (10:46 -0800)]
Avoid divide-by-zero in vp8 initialization
Check that the numerator is not zero. If it is, guess 30fps.
Fixes a clang IOC error in the quantize test. It's very unlikely for
this to occur in the wild because the setup in the quantize test is very
nonstandard.
Jingning Han [Mon, 3 Nov 2014 19:36:34 +0000 (11:36 -0800)]
Skip ref frame mode search conditioned on predicted mv residuals
This commit makes the RTC coding mode to conditionally skip the
reference frame mode search, when the predicted motion vector of
the current reference frame gives more than two times sum of
absolute difference compared to that of other reference frames.
It reduces the runtim by 1% - 4% for speed -5 and -6. The average
compression performance is improved by about 0.1% in both settings.
It is of particular benefit to light change scenarios. The
compression performance of test clip mmmovingvga.y4m is improved by
6.39% and 15.69% at high bit rates for speed -5 and -6, respectively.
Speed -5
vidyo1 16555 b/f, 40.818 dB, 12422 ms ->
16552 b/f, 40.804 dB, 12100 ms
nik 33211 b/f, 39.138 dB, 11341 ms ->
33228 b/f, 39.139 dB, 11023 ms
mmmoving 33263 b/f, 40.935 dB, 13508 ms ->
33256 b/f, 41.068 dB, 12861 ms
Speed -6
vidyo1 16541 b/f, 40.227 dB, 8437 ms ->
16540 b/f, 40.220 dB, 8216 ms
nik 33272 b/f, 38.399 dB, 7610 ms ->
33267 b/f, 38.414 dB, 7490 ms
mmmoving 33255 b/f, 40.555 dB, 7523 ms ->
33257 b/f, 40.975 dB, 7493 ms
Marco [Mon, 3 Nov 2014 06:10:56 +0000 (22:10 -0800)]
Allow disable of refresh golden for more than 1 layer encoding.
The current logic was allowing for disabling golden refresh only
for two pass svc encoding. This change disables it as long as
more than 1 layer encoding is used (for example temporal layers under 1pass CBR).
levytamar82 [Thu, 16 Oct 2014 23:56:37 +0000 (16:56 -0700)]
WORKAROUND FIX FOR GCC4.9.1
In the function mb_lpf_horizontal_edge_w_avx2_16 the usage of the intrinsic
_mm256_cvtepu8_epi16 cause a compiler bug in gcc 4.9.1.
until it will be fixed I created a workaround that create the up convert by
using broadcast128+shuffle.
The bug was reported here:
https://code.google.com/p/webm/issues/detail?id=867
Yaowu Xu [Sat, 1 Nov 2014 00:27:54 +0000 (17:27 -0700)]
Fix speed 7 and speed 12 for rt
A recent change has introduced big quality drops for speed 7 and 12
for --rt mode. The change reverted the big drop and improved quality
by 9.5% for speed 7 and 13.4% for speed 12.
hkuang [Mon, 27 Oct 2014 23:19:04 +0000 (16:19 -0700)]
Bind motion vectors with frame buffer structure.
This will save a lot of memory for decoder due to removing of prev_mi,
but prev_mi is still needed in encoder. So this will increase a little bit
memory for encoder.
Johann [Mon, 20 Oct 2014 23:03:28 +0000 (16:03 -0700)]
vp8 quantization -> intrinsics
Use intrinsics for neon quantization. Slight loss (<5%) of performance
compared to the assembly. Roughly 10x faster on arm64 because that was
running C code before.
Jingning Han [Wed, 29 Oct 2014 23:37:16 +0000 (16:37 -0700)]
Rework pred pixel buffer system in non-RD coding mode
This commit makes the inter prediction buffer system to support
hybrid partition search. It reduces the runtime of speed -5 by
about 3%. No compression performance change.
Jingning Han [Tue, 28 Oct 2014 21:50:10 +0000 (14:50 -0700)]
Enable mode search threshold update in non-RD coding mode
Adaptively adjust the mode thresholds after each mode search round
to skip checking less likely selected modes. Local tests indicate
5% - 10% speed-up in speed -5 and -6. Average coding performance
loss is -1.055%.
speed -5
vidyo1 720p 1000 kbps
16533 b/f, 40.851 dB, 12607 ms -> 16556 b/f, 40.796 dB, 11831 ms
nik 720p 1000 kbps
33229 b/f, 39.127 dB, 11468 ms -> 33235 b/f, 39.131 dB, 10919 ms
speed -6
vidyo1 720p 1000 kbps
16549 b/f, 40.268 dB, 10138 ms -> 16538 b/f, 40.212 dB, 8456 ms
nik 720p 1000 kbps
33271 b/f, 38.433 dB, 7886 ms -> 33279 b/f, 38.416 dB, 7843 ms
JackyChen [Sat, 25 Oct 2014 17:51:51 +0000 (10:51 -0700)]
vp9_denoiser_sse2: refactor the code.
Combined vp9_denoiser_8xM_sse2 and vp9_denoiser_4xM_sse2 into one
function vp9_denoiser_NxM_sse2_small and passed the bitexact testing.
Changed the name of the function vp9_denoiser_64_32_16xM_sse2 to
vp9_denoiser_NxM_sse2_big.
Yaowu Xu [Fri, 17 Oct 2014 19:13:16 +0000 (12:13 -0700)]
Allow update of golden refernce buffer in CBR mode
This commit changes to allow the usage of golden reference frame in
VP9 CBR mode to improve quality. VP9 supports potentially up to 8
reference buffers, it has reference buffers available for this
purpose. This was not possible in VP8 as golden and alt-ref buffers
were used for temporal scalability purpose in CBR mode in WebRTC.
For frames that update golden frame, there can be a quality boost.
The amount of allowed bitrate boost can be controlled via parameter
rc_max_inter_bitrate_pct. The inital value of the boost ratior is
currently based on over_shoot_pct. Further experiments will work
out the adaption of this boost value.
Paul Wilkins [Tue, 28 Oct 2014 13:03:06 +0000 (13:03 +0000)]
Relax maximum Q for extreme overshoot.
Added code to relax the active maximum Q in response
to extreme local overshoot to reduce bandwidth peaks.
The impact is small in metrics terms, but it this helps reduce
bandwidth spikes and overall overshoot in a number of
clips in our tests sets (especially the YT test set).
In particular this should help prevent very big spikes where a clip
is mainly easy but has a short hard section. In such a case a choice
of maximum Q for the clip as a whole may allow us to hit the overall
target rate but give some extreme spikes. The chunked encoding in YT
mitigates this problem but it can show up where a longer clip is
coded as a single chunk.
Jingning Han [Mon, 27 Oct 2014 19:03:47 +0000 (12:03 -0700)]
Use zero motion vector in choose_partitioning
The zero motion vector was effectively used in the subsampled pixel
based variance calculation. This commit makes it directly use zero
mv to generate prediction.
Yaowu Xu [Mon, 27 Oct 2014 20:13:14 +0000 (13:13 -0700)]
Add a new control of golden frame boost in CBR mode
0 means that golden boost is off, and uses average frame target rate,
a non-zero number means the percentage of boost over average frame
bitrate is given initially to golden frames in CBR mode.
Jingning Han [Thu, 23 Oct 2014 23:54:45 +0000 (16:54 -0700)]
Tile based adaptive mode search in RD loop
Make the spatially adaptive mode search in rate-distortion
optimization loop inter tile independent. Experiments suggest that
this does not significantly change the coding staticstics.
Single tile, speed 3:
pedestrian_area 1080p 1500 kbps
59192 b/f, 40.611 dB, 101689 ms
blue_sky 1080p 1500 kbps
58505 b/f, 36.347 dB, 62458 ms
mobile_cal 720p 1000 kbps
13335 b/f, 35.646 dB, 45655 ms
as compared to 4 column tiles, speed 3:
pedestrian_area 1080p 1500 kbps
59329 b/f, 40.597 dB, 101917 ms
blue_sky 1080p 1500 kbps
58712 b/f, 36.320 dB, 62693 ms
mobile_cal 720p 1000 kbps
13191 b/f, 35.485 dB, 45319 ms
Marco [Fri, 24 Oct 2014 16:31:38 +0000 (09:31 -0700)]
vp8: Updates to noise level estimate.
-Use full bandwidth (when temporal layers is on) for checking switching.
-Normalize metric wrt num_blocks.
-Rounding fix to update of average noise level metric.
-Make default internal denoiser mode == kDenoiserOnYUV (in denoiser set_parameters()).
-Adjust some thresholds.
Adrian Grange [Fri, 17 Oct 2014 22:12:43 +0000 (15:12 -0700)]
Move frame re-sizing into the recode loop
The point at which frames are scaled to their
coded dimensions is moved into the re-code loop.
This is in preparation for a further patch that
will add logic into the re-code loop to reduce
the coded frame size if the encoder is struggling
to hit the target data rate at the native frame
size.
Paul Wilkins [Wed, 22 Oct 2014 12:46:40 +0000 (13:46 +0100)]
Enable dual arf with constant q.
Add second level arf Q adjustment when using dual arfs
in constant Q mode.
Previously in constant Q mode enabling dual arf hurt by ~5%
but with this change the average benefit is ~1-1.5% with some
mid range data points up ~10%.
Note however that it still hurts on some clips including
some very low motion show content.
This patch allocated frame contexts outside VP9_COMMON. This allows
multiple threads to share the same copy of frame contexts, and
reduces the overhead. It also guarantees the correct update of
these contexts during bitstream packing. This patch doesn't change
encoding result.
Yaowu Xu [Wed, 22 Oct 2014 18:57:09 +0000 (11:57 -0700)]
Fix a subtle issue in re-use inter_pred
The initialization of this_mode_pred does not work when the ref_frame
loop ever goes beyond LAST_FRAME. This commit fixes the subtle issue
and allows potentially expanding the loop to test GOLDEN_FRAME.
Yaowu Xu [Mon, 20 Oct 2014 21:41:20 +0000 (14:41 -0700)]
Change speed features for good quality(cpu-used=5)
The existing speed features produce horrible encoding results, almost
30% worse than cpu-used=4, this commit adjust the speed features to
produce relatively resonable results to be within 3%-5% of cpu-used=4.
projects / libvpx / log