For now, this is used for histograms where A,R,B are
trivial. This can be done on a per-symbol basis for
speed-ups.
Only the entropy bin merge criterion is kept with
A,R,B to not create speed regressions (but compression
improvements).
Change-Id: Iaff6f6d5f157066e481bf43553ea5edd01ff1cde
After:
44f91b0d Speed DispatchAlpha_SSE2 up
_mm_set1_epi8 takes a char argument; add a `char` cast for 0xff.
from clang-14 integer sanitizer:
implicit conversion from type 'int' of value 255 (32-bit, signed) to
type 'char' changed the value to -1 (8-bit, signed)
Change-Id: I0f4ed092eddc0beb311f44bf3d4b74a4d1177040
* `down_only`: downsample only if one of the input dimensions is larger
than the target
* `up_only`: upsample only if one of the input dimensions is smaller
than the target
* `always`: the original behavior
This change doesn't add related modes like area (@ in ImageMagick) or
minimum width/height (^ in ImageMagick). These can be added if a need
arises.
Bug: webp:405437935
Change-Id: I7752789dce6e3b9c3fb7d6edf63ca5559bb3463c
This is a follow up to:
ee8e8c62 Fix member naming for VP8LHistogram
This better matches Google style and clears some clang-tidy warnings.
This is the final change in this set. It is rather large due to the
shared dependencies between dec/enc.
Change-Id: I89de06b5653ae0bb627f904fa6060334831f7e3b
This is a follow up to:
ee8e8c62 Fix member naming for VP8LHistogram
This better matches Google style and clears some clang-tidy warnings.
Change-Id: Ie2f82401e1ba28bd0575b6bb82d12ed55c71718f
This is a follow up to:
ee8e8c62 Fix member naming for VP8LHistogram
This better matches Google style and clears some clang-tidy warnings.
Change-Id: Ib58d676fa79c5a4a95c676a98b62b548097f3c48
This is a follow up to:
ee8e8c62 Fix member naming for VP8LHistogram
This better matches Google style and clears some clang-tidy warnings.
Change-Id: Ia4ce0fd0095f76f7edbc0fc6fe7f625e0d8bc6df
This is a follow up to:
ee8e8c62 Fix member naming for VP8LHistogram
This better matches Google style and clears some clang-tidy warnings.
Change-Id: Ice1edbbd98172a916be6b6d3cdaff80fe05a6e37
This is a follow up to:
ee8e8c62 Fix member naming for VP8LHistogram
This better matches Google style and clears some clang-tidy warnings.
Change-Id: I23878bca2e14a898266704f3fec65d40f58fd0b2
This is a follow up to:
ee8e8c62 Fix member naming for VP8LHistogram
This better matches Google style and clears some clang-tidy warnings.
Change-Id: I9774ed6182ee4d872551aea56390fc0662cf0925
This is a follow up to:
ee8e8c62 Fix member naming for VP8LHistogram
This better matches Google style and clears some clang-tidy warnings.
Change-Id: Ida41ca82445800552573ff5ebbde743cf8fa6eff
This is a follow up to:
ee8e8c62 Fix member naming for VP8LHistogram
This better matches Google style and clears some clang-tidy warnings.
Change-Id: If6a77a316e36a6d87abaa69692a34374ba6aed4f
- move the bin_id to the Histogram
- do not consider empty histograms
The speed-ups are negligible as linear algorithms in uint16_t are
removed, while the whole code is still O(N^2) in histograms.
Change-Id: Ie9c4831f0f3c64af9d9710a1dc2d817ba165389e
On some dataset, this was taking 2.5%. 2% when switching to
_mm_maskmoveu_si128. 1.7% when using _mm_loadu_si128
Confirmed by IACA: going from throughput of 4.26 to 3.5 and then
to 6.26 for twice the input.
Change-Id: I409f901aaad9d39bf55a1aac28cc25f126876b01
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
