Better stack/register usage in SSE2/NEON code and improved vectorization
of the C code with ndk r27/gcc-13/clang-16.
This only affects non-vector pointers; any vector pointers are left as a
follow up.
Change-Id: I32b53dd38bfc7e2231d875409e7dfda7c513cfb6
This allows for better vectorization of the C code, inlining of
TrueMotion_SSE2, better load usage in aarch64 and other minor
reordering with ndk r27/gcc-13/clang-16.
This only affects non-vector pointers; any vector pointers are left as a
follow up.
Change-Id: I07e9944d5c0aa5a079b22883ac5a2d649695e4a0
A minor improvement for arm targets with ndk r27/gcc-13 in H/VFilter8 (a
couple fewer moves w/aarch64) and much better vectorization of
DitherCombine8x8_C in most targets.
This only affects non-vector pointers; any vector pointers are left as a
follow up.
Change-Id: I03e73e6d6404261bb8408a9ae76a4b6ef142f8f0
on SetResidualCoeffs_*. This results in some minor code reordering when
targeting arvm7 with ndk r27 and other recent versions of clang. No
changes in the x86 compilations with clang-16 / gcc-13.
This only affects non-vector pointers; any vector pointers are left as a
follow up.
Change-Id: I7c3554ece848fafbc5ac9c4944f1dc85129f6fd8
- use plural 'Notes' in the description of 'Background Color' to match
the formatting of the notes describing 'Disposal method';
- fix one unknown chunks link to contain both words to match others
+ add a couple of missing commas
These changes are based on editor changes in AUTH48:
https://datatracker.ietf.org/doc/draft-zern-webp/
Change-Id: Ibbed0459d42944099e295f492dc21bde4e107658
Use 'Chunk Size bytes - N' to avoid singular/plural confusion in the
case of 'Chunk Size - 1 bytes' case.
These changes are based on editor comments in AUTH48:
https://datatracker.ietf.org/doc/draft-zern-webp/
Change-Id: I898113033fd53d744fe9289f971887b8cfe278b9
histogram_symbols is converted to uint32_t and <<8 into
histogram_argb.
Using a uint32_t buffer from the start prevents copying and
converting the data.
Change-Id: I245003a6a0f048c31519afa25a600d4479e762e3
The wording might have implied that the library would optionally use
sharpyuv, though this option forces its use. The riskiness score
computed by SharpYuvEstimate420Risk() (extras/extras.c) is not used by
the library.
Change-Id: I56ea3262d7985215570809a4a629a2a7760e936a
This is useful for a forward change that will improve compression.
It splits the residual computation and the best predictor
selection.
The only downside is that more memory is allocated: we had 2
histograms before, we now have 14, but this is necessary for the
later change. Still, this is nothing compared to what is done
later in the pipeline in HistogramSetTotalSize where the number of
histograms created is the number of pixels in the subsampled image.
Change-Id: If03501a26f00462dd1809daa6e9314abd180945d
WebPCleanupTransparentAreaLossless() was renamed to
WebPReplaceTransparentPixels() in:
55a080e5 Add WebPReplaceTransparentPixels() in dsp
Change-Id: I91e32574e6add2748c0655146f100eb2b40498b2
In practice, this can never happen because:
- 'streak' is at most as long as a histogram
- 'count' counts the number of streaks
'streak' and 'count' are therefore at most as big as the histogram
length which is at most the max of VP8LHistogramNumCodes,
which is 256+24+(1<<10).
Change-Id: I31c8834543479c8a9260732313ea26b045519515
The default template for https://issues.webmproject.org/ is a public bug
report. Security issues can be reported securely using the 'Security
report' template.
Change-Id: Id489253c0def8a4d6d26327ea93ef4c796703ff1
The row parameter became a constant in:
2102ccd update the Unfilter API in dsp to process one row independently
num_rows is always equal to height.
Change-Id: Ie43dc5ef222e442ce8c92766da0b9824ccbca236
The inverse parameter became a constant in:
2102ccd update the Unfilter API in dsp to process one row independently
The row parameter to these functions is in a similar state; it will be
removed in a follow up.
Change-Id: I94cd8babe0e42474ff794ba5fa29dd48039de5f8
Replace vmovl_u8 -> s16 + signed vaddq with unsigned vaddw.
No change in assembly with clang-16 (armv7 & aarch64) and gcc-13
(aarch64). armv7 gcc-13 had kept the vmovl instructions, those are now
gone.
Change-Id: Ibb4fbdd5680d3e9dd06933c100528a6f363de472
Replace the only use of 'prediction transform' with 'predictor
transform' which is used throughout the text.
Spotted by thakis@.
Bug: webp:355607636
Change-Id: Ic4e1f08e2ff94da82824cee24c86a4fa42c7ec28
This brings minor size improvements because repetitive values in
the transform images are easily explainable through LZ77. Still,
it makes an upcoming pull request a bit more stable.
This is a rollforward of
7ec51c5916ee26766a89
Change-Id: I254ab3ccd5053344f89099280e8d994ecd55aee0
This needs to be done with signed saturation as the sum may be negative.
fixes mismatch with C code after:
3bfb05e3 Add AArch64 Neon implementation of Intra16Preds
Change-Id: I017e939d7155cc3489ceb76fc8ad50ac9917f23d
This needs to be done with signed saturation as the sum may be negative.
fixes mismatch with C code after:
baa93808 Add AArch64 Neon implementation of Intra4Preds
Change-Id: I190c3d7f78cfd2c7ae83fb7059de41e307abda36
