Marco Paniconi [Wed, 18 Jul 2018 21:36:17 +0000 (14:36 -0700)]
vp9: Screen-content after slide-change: increase refresh rate
For screen-content real-time CBR mode: on a detected slide change
that is encoded at max Q (to prevent excessive overshoot), increase
the perc_refresh in the cyclic refresh following the slide change.
Use counter to increase refresh up to some #frames from slide change.
This is attempt to increase quality ramp-up after slide change without
causing too much excess overshoot.
vpx_sum_squares_2d_i16_neon(): Make |s2| a uint64x1_t.
This fixes the build with at least GCC 7.3, where it was previously failing
with:
sum_squares_neon.c: In function 'vpx_sum_squares_2d_i16_neon':
sum_squares_neon.c: note: use -flax-vector-conversions to permit conversions between vectors with differing element types or numbers of subparts
s2 = vpaddl_u32(s1);
^~
sum_squares_neon.c: incompatible types when assigning to type 'int64x1_t' from type 'uint64x1_t'
s2 = vpaddl_u32(s1);
^
sum_squares_neon.c: incompatible types when assigning to type 'int64x1_t' from type 'uint64x1_t'
s2 = vadd_u64(vget_low_u64(s1), vget_high_u64(s1));
^
sum_squares_neon.c: incompatible type for argument 1 of 'vget_lane_u64'
return vget_lane_u64(s2, 0);
^~
The generated assembly was verified to remain identical with both GCC and
LLVM.
Marco Paniconi [Thu, 12 Jul 2018 02:38:44 +0000 (19:38 -0700)]
vp9: Force hybrid_intra on scene change
For real-time screen content mode: when scene/slide change
is detected and re-encode is decided, force hybrid_intra
mode search if slide change is big and alot of Intra modes
were used. hybrid_intra mode will use rd-based intra mode
search for small blocks.
Overall better PSNR on clip with slide changes, with similar
encoded frame size. Encode time lightly higher on average with
this change.
Jingning Han [Mon, 16 Jul 2018 21:31:51 +0000 (14:31 -0700)]
Assign estimate qp for overlay frame
Assign the estimated qp for the overlay frame too. Cap the minimum
quantization parameter to be 1 to avoid lossless coding in the
temporal dependency model setup.
Jingning Han [Fri, 13 Jul 2018 21:08:45 +0000 (14:08 -0700)]
Estimate the frame qp in a gop
Gather the availabel statistics to estimate the frame level
quantization parameter set in a group of pictures. This will be
called in the tpl model construction. No visible coding stats
change would occur.
libaom commit ccb27264089a8cfa1334391ebbcb6a11b8dff442:
Misc. resize fixes along with the resize test
Note: only the change to enc_free_mi in av1/encoder/encoder.c
is merged.
James Zern [Wed, 11 Jul 2018 19:44:27 +0000 (12:44 -0700)]
test-data.sha1: update crbug-1539.rawfile
Use a valid frame rather than the one from the bug to avoid dealing with
trailing data. The decode would fail on x86 due to read size differences
in the entropy decoder.
The updated file was created from the first frame in:
vp90-2-02-size-08x08.webm
Jingning Han [Mon, 9 Jul 2018 18:07:52 +0000 (11:07 -0700)]
Add 32x32 Hadamard transform
Add 32x32 Hadamard transform in C implementation. Replace the
forward 32x32 2D-DCT in tpl model with Hadamard transform. This
would reduce the overhead encoding time due to running tpl model
by ~3x.
Jingning Han [Tue, 10 Jul 2018 22:29:28 +0000 (15:29 -0700)]
Relax multiplier adjustment limit
Relax the Lagrangian multiplier adjustment limit from 1/4 to 1/2
fluctuation. This allows the temporal dependency model takes more
effect on changing the rate allocation across blocks.
Marco Paniconi [Tue, 10 Jul 2018 17:02:21 +0000 (10:02 -0700)]
vp9: Initialize source variance in nonrd-pickmode.
It is already initialized at superblock level, but since
it is computed per coding block, based on some speed features,
better to initialize it in pick_inter.
No change in behavior, as currently the speed features
that enable use of source_variance in pick_inter are fixed
at the frame-level.
Marco Paniconi [Wed, 11 Apr 2018 17:59:34 +0000 (10:59 -0700)]
vp9-svc: Intra-only frame for spatial layers.
Use case is for layered (SVC) coding to allow higher
resolution layers to continue decoding with temporal references,
while base spatial layer is intra-only frame.
Made encoder changes to real-time path for encoding intra-only
frame. The intra-only frame will be followed by the overlay/copy
frame (with both packed in the same superframe).
Use existing control to enable intra_only frame.
Intra only is only applied to base spatial layer, and only
allowed under fixed/non-flexible SVC mode, and only for
1 < number_spatial_layers < 4.
Added svc datarate unittest for inserting intra_only frame
as sync frame. Added svc end to end tests to check mismatch.
Change-Id: I2f4f0106b2c4f51ce77aa2c1c6823ba83ff2f7a0 Signed-off-by: Marco Paniconi <marpan@google.com>
Paul Wilkins [Fri, 6 Jul 2018 16:02:26 +0000 (17:02 +0100)]
Delete invalid assert.
Delete assert that is not valid in all cases.
This can occur if the last group in a clip is a GF only
group. Here the frame count reflects the nominal
positioning of the "next" GF (were it to exist) one
frame beyond the of the end of the clip.
Sergey Silkin [Thu, 28 Jun 2018 09:00:00 +0000 (11:00 +0200)]
vp9-svc: add more command line options to test app.
This adds the following command line options to
vp9_spatial_svc_encoder test app:
--drop-frame=<arg> Temporal resampling threshold (buf %)
--tune-content=<arg> Tune content type default, screen, film
--inter-layer-pred=<arg> 0 - 3: On, Off, Key-frames, Constrained
Marco Paniconi [Fri, 29 Jun 2018 22:34:54 +0000 (15:34 -0700)]
vp9: Reset params for cyclic refresh on slide change
Reset the last_coded_q_map and the sb->index in the cyclic_refresh
on a re-encode for slide change, so the refresh can start again
right after slide change.
Jingning Han [Wed, 20 Jun 2018 20:15:10 +0000 (13:15 -0700)]
Exploit the spatial variance in temporal dependency model
Adapt the Lagrangian multipler based on the spatial variance in
the temporal dependency model. The functionality is disabled by
default. To turn on, set enable_tpl_model to 1.
Marco Paniconi [Thu, 28 Jun 2018 23:08:55 +0000 (16:08 -0700)]
vp9-svc: Adjust threshold for early exit on golden
Use the avg_frame_low_motion to reduce/turnoff this
early exit for higher motion content. Get some quality
back for higher motion clips and keep the same exit
thresh for low motion clips.
Paul Wilkins [Tue, 26 Jun 2018 14:57:51 +0000 (15:57 +0100)]
Enhanced partition experiment.
This patch relates to motion artifacts as described in Issue 73484098
The aim of this patch is to promote the use of smaller partition
sizes in places where some of the sub blocks have very low
spatial complexity and some have much higher complexity.
The patch can have a small impact on encode speed, but much
less than alternative approaches such as lowering the rd thresholds
that limit the partition search when distortion is low.
The patch also applies a similar sub block strategy for AQ1.
Metrics results for our standard sets over typical YT rates.
(Overall PSNR, SSIM, PSNR HVS) % -ve better.
Low Res -0.274, -0.303, -0.330
Mid Res 0.001, - 0.128, -0.100
Hd Res -0.236, -0.371, -0.349
N 2K -0.663, -0.798, -0.708
N 4K -0.488, -0.588, -0.517
Marco Paniconi [Wed, 27 Jun 2018 20:04:18 +0000 (13:04 -0700)]
vp9-svc: Set avg_frame_low_motion for lower layers.
The avg_frame_low_motion metric is only computed on the
top spatial layer, and since its part of the layer context
struct, it needs to written to all lower spatial layers for
consistency.
Small/minor change in metrics.
Change-Id: I92a001c37aeb332e613212288b13a2ed9745af88
Marco Paniconi [Wed, 27 Jun 2018 19:26:09 +0000 (12:26 -0700)]
vp9-svc: Fix to early golden exit nonrd-pickmode
For SVC: apply the sse_zeromv early exit also to
the case where golden is second temporal reference.
Set the thresh_svc_golden threshold for this case.
This is reduce the encode time for case where golden
is second temporal reference for SVC.
Change-Id: I8c0c87dd746579d3c4f5e983c7f9dd0a1e1476e0
projects / libvpx / log