Both first pass and mbgraph search use block size 16x16 for motion
estimation. This commit put a limit of motion vector range. The
effective range allows the entire 16x16 with required subpel
interpolation input to be completely outside image border, but
not any further away from image border.
INT64_MAX may be assigned as RDCOST when RDCSOST computation is skipped
for speed, this commit to prevent INT64_MAX from being used as real
RDCOST in transform size decision.
After change of MI context storage , mi_8x8[] pointer may be null for
a block outside of image border. The commit changes to access the data
only after validation of mi_row and mi_col.
Jingning Han [Tue, 24 Sep 2013 00:06:27 +0000 (17:06 -0700)]
Remove redundant mode update in sub8x8 decoding
The probability model used to code prediction mode is conditioned
on the immediate above and left 8x8 blocks' prediction modes. When
the above/left block is coded in sub8x8 mode, we use the prediction
mode of the bottom-right sub8x8 block as the reference to generate
the context.
This commit moves the update of mbmi.mode out of the sub8x8 decoding
loop, hence removing redundant update steps and keeping the bottom-
right block's mode for the decoding process of next blocks.
39c7b01d accidently reverted the row/col initialization, which broke
mv clamps, which is dependent on the sites for valid motion vector
range. This commit fixed the issue.
Deb Mukherjee [Fri, 20 Sep 2013 07:41:29 +0000 (00:41 -0700)]
Improves constant qual, constrained qual turned on
Adds modeled functions to decide the qp for altref frames in constant q
mode similar to other functions in use in bitrate mode.
Also turns on the constrained quality mode (end-usage=2) option which
was turned off before. Basic testing shows the mode works in principle,
to cap bitrate to the target-bitrate specified, while allowing lower
bitrate depending on the cq-level specified. The mode will need to be
improved over time.
Results for constant quality vs bitrate control mode:
derfraw300/fullderfraw: +3.0% at constant quality over bitrate control.
fullstdhdraw: +4.341%
stdhdraw250: +5.361%
Jingning Han [Fri, 20 Sep 2013 18:30:46 +0000 (11:30 -0700)]
Calculate rd cost per transformed block
This commit makes the rate-distortion optimization loop evaluate
the rd costs of regular quantization and all zero coeffs, per
transformed block. It improves speed 1 compression performance:
derf: 0.245%
yt: 0.515%
For a large partition that consists multiple transformed blocks,
this allows more flexibility to selectively force a portion of
them coded as all zero coeffs, as well be continued in the next
patches.
Jingning Han [Thu, 19 Sep 2013 17:27:09 +0000 (10:27 -0700)]
Remove redundant mv_pred use for sub8x8 blocks
The sub8x8 blocks has its own motion vector reference scheme. The
mv_pred is only used blocks of sizes 8x8 and above, to find the
starting point for motion search.
This change does not change any coding behavior. It makes the
encoding process slightly faster. (0.5% speed-up for local test on
speed 1.)
Yunqing Wang [Wed, 18 Sep 2013 17:36:21 +0000 (10:36 -0700)]
Fix x86inc.asm to build PIC code correctly
Current x86inc.asm didn't handle 32bit PIC build properly.
TEXTRELs were seen in the library built. The PIC macros from
libvpx's x86_abi_support.asm was used to fix this problem.
The assembly code was modified to use the macros.
Notes: We need this fix in for decoder building. Functions in
encoder will be fixed later.
Adrian Grange [Thu, 12 Sep 2013 16:35:04 +0000 (09:35 -0700)]
Modified resize unit test to output test vector
Modified the resize unit test so that it optionally
writes the encoded bitstream to file. The macro
WRITE_COMPRESSED_STREAM should be set to 1 to enable
output of the test bitstream; it is set to 0 by default.
Adrian Grange [Mon, 16 Sep 2013 18:46:00 +0000 (11:46 -0700)]
Fix failure to copy data files if content changes
Jenkins was failing to detect the case where an existing
file is recreated with new content. In this case, thinking
that the file already existed, Jenkins did not re-copy the
file as it should have.
By adding the file test-data.sha1 as a dependendency to
the LIBVPX_TEST_DATA build target the files will be
recopied if the MD5 of an existing file changes.
This could be further improved to only copy files that
have changed rather than copying the whole set as done in
this patch.
(Thanks to jzern@ who diagnozed ithe problem and suggested
this fix).
The commit added reset of pred_mv at the beginning of each SB64x64
partition mv search, also limited the usage of pred_mv only when
search on the largest partition is already done. This is to fix
a crash at speed 1/2 encoder where an invalid mv is used in mv
search.
Jingning Han [Thu, 12 Sep 2013 17:06:47 +0000 (10:06 -0700)]
Adaptive motion search control
This commit enables adaptive constraint on motion search range for
smaller partitions, given the motion vectors of collocated larger
partition as a candidate initial search point.
It makes speed 0 runtime of bus at CIF and 2000 kbps goes from
167s down to 162s (3% speed-up), at 0.01dB performance gains. In
the settings of speed 1, this makes the runtime goes from 33687 ms
to 32142 ms (4.5% speed-up), at 0.03dB performance gains.
Compression performance wise, it gains at speed 1:
derf 0.118%
yt 0.237%
hd 0.203%
stdhd 0.438%
Paul Wilkins [Fri, 13 Sep 2013 12:14:38 +0000 (13:14 +0100)]
Fix VP9_mode_order[]
Mis-merge of the following change managed to break mode order
and delete two mode options (new alt ref and near alt ref)
It also created a situation where we could test two undefined
modes off the end of the VP9_mode_order[] data structure.
"clang warnings : remove split and i4x4_pred fake modes"
"Change Id: I8ef3c*"
Initial testing on Akiyo at speed 2.
101.35 44.567 44.447 improves to
96.82 44.915 44.815
projects / libvpx / log