Entropy clustering merges symbol histograms to reduce the overall
entropy. The cost of 2 added histograms is compared to the 2 costs
of the individual histograms and if it is smaller, a merge is done.
Except for some symbols (distance and length), the computed cost is
the real final cost based on the histogram, and some constant cost
(independent from the probabilities of the symbols and hence the
merge) because the symbol is encode as Golomb.
This constant cost is useless and can be removed.
Change-Id: I6271e8c0e4111cdeff544cbdb7dec3c67be5309c
This restores the use of the function after
980b708e enc_neon: fix build w/aarch64 gcc < 9.4.0
The intrinsic was added to llvm for aarch64 in:
5e4ce1ae9dad Implement the newly added AArch64 ACLE functions for
ld1/st1 with 2/3/4 vectors. The functions are like:
vst1_s8_x2 ...
llvmorg-3.4.0-rc1~101
https://github.com/llvm/llvm-project/commit/5e4ce1ae9dad
Visual Studio 2019 and 2022 also support the function (2017 is still
disabled for this path due to it relying on arm64_neon.h).
Change-Id: I6ff10e22deb3968a48738a4458d2d3d55410b5ec
Test file created with ImageMagick 6.9.13-12:
```
convert test_exif.png test_app1_exif.png
```
Bug: webp:398066379
Change-Id: I10a20de5699fabb0906045994d7d1f4b9e951973
This matches the current support matrix (from 2024-12-17) [1] and quiets
a warning from recent (3.31.5) versions of cmake:
CMake Deprecation Warning at CMakeLists.txt:12 (cmake_minimum_required):
Compatibility with CMake < 3.10 will be removed from a future version
of CMake.
Explicit setting of CMP0072 is also removed; it was added in 3.11.
[1]: https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md
Bug: webp:397130631
Change-Id: Ic844dadf983a82674990edbddbfc54329df12eb7
Fixed: webp:397130631
- 12/19/2024 version 1.5.0
This is a binary compatible release.
API changes:
- `cross_color_transform_bits` added to WebPAuxStats
* minor lossless encoder speed and compression improvements
* lossless encoding does not use floats anymore
* additional Arm optimizations for lossy & lossless + general code generation
improvements
* improvements to WASM performance (#643)
* improvements and corrections in webp-container-spec.txt and
webp-lossless-bitstream-spec.txt (#646, #355607636)
* further security related hardening and increased fuzzing coverage w/fuzztest
(oss-fuzz: #382816119, #70112, #70102, #69873, #69825, #69508, #69208)
* miscellaneous warning, bug & build fixes (#499, #562, #381372617,
#381109771, #42340561, #375011696, #372109644, chromium: #334120888)
Tool updates:
* gif2webp: add -sharp_yuv & -near_lossless
* img2webp: add -exact & -noexact
* exit codes normalized; running an example program with no
arguments will output its help and exit with an error (#42340557,
#381372617)
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Merge tag 'v1.5.0'
libwebp-1.5.0
- 12/19/2024 version 1.5.0
This is a binary compatible release.
API changes:
- `cross_color_transform_bits` added to WebPAuxStats
* minor lossless encoder speed and compression improvements
* lossless encoding does not use floats anymore
* additional Arm optimizations for lossy & lossless + general code generation
improvements
* improvements to WASM performance (#643)
* improvements and corrections in webp-container-spec.txt and
webp-lossless-bitstream-spec.txt (#646, #355607636)
* further security related hardening and increased fuzzing coverage w/fuzztest
(oss-fuzz: #382816119, #70112, #70102, #69873, #69825, #69508, #69208)
* miscellaneous warning, bug & build fixes (#499, #562, #381372617,
#381109771, #42340561, #375011696, #372109644, chromium: #334120888)
Tool updates:
* gif2webp: add -sharp_yuv & -near_lossless
* img2webp: add -exact & -noexact
* exit codes normalized; running an example program with no
arguments will output its help and exit with an error (#42340557,
#381372617)
Bug: b:336795049,webp:380121350
* tag 'v1.5.0':
update ChangeLog
update NEWS
tests/fuzzer/*: add missing <string_view> include
fuzz_utils.cc: fix build error w/WEBP_REDUCE_SIZE
mux_demux_api_fuzzer.cc: fix -Wshadow warning
update ChangeLog
update NEWS
bump version to 1.5.0
update AUTHORS
Change-Id: I076b197fac29230bc61bc5f06e950d83d058a737
This may help prevent confusion when placing frame options after the
target frame.
Note for compatibility this isn't fatal, but the behavior may change in
the future.
Bug: webp:381372617
Change-Id: I9f3b51e60ff650ccc6fd29b8f5f607c3771a8a55
cwebp, gif2webp, img2webp, vwebp and webpinfo are modified in this
change to align with the other examples. When given no arguments, the
examples print their help output and exit with failure.
Bug: webp:42340557, webp:381372617
Change-Id: Ifed4eb79e98233f7aa780c42e489636d0cf4a035
After:
2c70ad76 muxread,CreateInternal: fix riff size checks (cl/200674839)
`SizeWithPadding()` adds `CHUNK_HEADER_SIZE` (plus additional 1 byte
padding if needed). A later check included `CHUNK_HEADER_SIZE` before
capping the value of the size passed to `WebPMuxCreateInternal()`,
missing cases with a small amount of extra data after the RIFF chunk
(like a newline when the file is opened and saved in a text editor) and
setting size to an incorrect value, so larger sizes would also fail.
Another check of `riff_size < CHUNK_HEADER_SIZE` after the call to
`SizeWithPadding()` is removed because 1) it could not fail given
`SizeWithPadding()` adds `CHUNK_HEADER_SIZE` to the value; and 2) it is
redundant as `size < RIFF_HEADER_SIZE + CHUNK_HEADER_SIZE` is checked
earlier in the function.
Bug: webp:42340561
Change-Id: I58dc4f071b27c2841001b4012aabdb1869f64f97
The values for the R/G/B floating point formulas resembled
https://fourcc.org/fccyvrgb.php and Video Demystified, but the fixed
point values are more closely aligned to rounded values from
https://en.wikipedia.org/wiki/YCbCr and BT.601.
The R/G/B formulas with the values prior to this change are added to
sharpyuv_csp.c as they align with the fixed values. The origin of those
coefficients is unclear. For consistency between library versions we'll
leave them as is.
Bug: webp:375011696
Change-Id: Id3f2a57530eee700cc52a899b32b25b5c015e89b
Don't use `-fembed-bitcode`, fixes:
ld: warning: -bitcode_bundle is no longer supported and will be ignored
ld: -mllvm and -bitcode_bundle (Xcode setting ENABLE_BITCODE=YES) cannot
be used together
Change-Id: I4ead0fc71da39bb5ec92c1f5ba467b95ad8b7461
Take advantage of the known sizes used by VP8LHistogramAdd() and
remove loop for the remainder. The loop was being auto-vectorized making
the code larger and slower than the vectorized C code.
For larger sizes the new code is ~3-4.5% faster than the old code with
about the same improvement against the vectorized C code. For the
minimal size (40), the new code is ~30% faster than the C and old SSE2
code.
The LINE_SIZE==8 option is removed with this change. It had been set
to 16 for its entire life and clang-16 was unrolling the LINE_SIZE==8
case by 2 in any case; they both profile similarly.
Change-Id: I6dfedfd57474f44d15e2ce510a48e5252221077a
Take advantage of the known sizes used by VP8LHistogramAdd() and remove
loop for the remainder. The loop was being auto-vectorized making the
code larger and slower than the vectorized C code.
For larger sizes the new code is ~4-7% faster than the old code with
about the same improvement against the vectorized C code. For the
minimal size (40), the new code is ~30% faster than the C and old SSE2
code.
The LINE_SIZE==8 option is removed with this change. It had been set to
16 for its entire life and clang-16 was unrolling the LINE_SIZE==8 case
by 2 in any case; they both profile similarly.
Change-Id: I2376e2dca3bffa38477b4a432f4c533419e3be0e
This change is the same as the one that introduced the options to
img2webp:
0825faa4 img2webp: add -sharp_yuv/-near_lossless
Change-Id: Id380d159299c38dd6440f833d487e00c0976afec
Extend VP8EncIterator::i4_boundary_ by 3 bytes to avoid Intra4Preds_NEON
reading deeper into the struct (likely padding) when top is positioned
at offset 29. This data is memset with MSan to prevent a warning due to
its incorrect modeling of tbl instructions.
Prior to:
169dfbf9 disable Intra4Preds_NEON
there was a mismatch in the preprocessor checks for enabling the
function in NEON and removing the C version; NEON used `BPS == 32` while
the C code was removed unconditionally when building for aarch64. This
patch also normalizes those checks to look for `BPS == 32` and `BPS !=
32` as appropriate.
Bug: b:366668849,webp:372109644
Change-Id: Ic9e6ad4b2d844cb446decd63aec0b2676a89c8d0
These appear as warnings under VS15 (16 and 17 are silent) and were
missed in:
a32b436b dsp/lossless*: use WEBP_RESTRICT qualifier
Change-Id: Ia7cffafc166f2da93b51714363558798cda71b67
* changes:
dsp/yuv*: use WEBP_RESTRICT qualifier
dsp/upsampling*: use WEBP_RESTRICT qualifier
dsp/rescaler*: use WEBP_RESTRICT qualifier
dsp/lossless*: use WEBP_RESTRICT qualifier
dsp/filters*: use WEBP_RESTRICT qualifier
dsp/enc*: use WEBP_RESTRICT qualifier
dsp/dec*: use WEBP_RESTRICT qualifier
dsp/cost*: use WEBP_RESTRICT qualifier
