The histograms count the occurrences of len/dist in entropy images.
Those (at most (1<<14) by (1<<14)) are sub-sampled by at least
MIN_HUFFMAN_BITS == 2, hence at most 24 bits in a histogram value.
At most, we multiply by 19 (because the longest histogram is of
size 40 and we do 40>>1, cf code) for the bit cost. So it all fits
in 32 bits.
Change-Id: Ife24b035f54794851ff31f2fac07901f724c6d7f
Reference the section by number, rather than 'this section'. Fixes a
lint warning:
Style notice: Write unique, descriptive link text that makes sense
without the surrounding text. Don't use phrases such as this document,
this article, or click here.
https://developers.google.com/style/link-text?hl=en#write-link-text
Change-Id: Iab33e4980528dddb5eed4404d25a4a746705131a
remove AMENDED-notes (the last functional spec change to match with the
implementation is from 2014, other amendments are clarifications)
Bug: webp:581
Change-Id: Ic47739be0fd5a975fd734d6813567ca615304f1d
This can be tested by running:
cmake ../ -DWEBP_BUILD_ANIM_UTILS=OFF -DWEBP_BUILD_CWEBP=OFF -DWEBP_BUILD_DWEBP=OFF -DWEBP_BUILD_GIF2WEBP=OFF -DWEBP_BUILD_IMG2WEBP=OFF -DWEBP_BUILD_EXTRAS=OFF
Bug: webp:612
Change-Id: Ie06d8f0535676d6d31ff0047ff7a6c026e16118e
and define it to true for __aarch64__ and Win Arm64 + Visual Studio.
Microsoft's compiler (cl.exe) does not define __aarch64__, but relies on
_M_ARM64 & _M_ARM64EC
Bug: b/277254922
Change-Id: I20e4fa07a4031599db69e3d7ba9050345315ef51
This avoids defining a version in each translation unit when using
__declspec(dllexport) which causes failures due to multiply defined
symbols with clang-cl:
lld-link: error: duplicate symbol: VP8GetCPUInfo
>>> defined at CMakeFiles\webpdecode.dir\Debug\src\dec\alpha_dec.c.obj
>>> defined at CMakeFiles\webpdsp.dir\Debug\src\dsp\dec_sse41.c.obj
...
Bug: webp:607
Change-Id: I6cd1ee75b3db984aa513263a05516e867a64925d
These were picked up when matching autoconf's default checks and aren't
useful except to compare the generated config.h. Removing them speeds up
cmake, especially on windows where creating new processes is slow.
Change-Id: Ie891aad0a809af16357168d2ff7fd65922ee4011
Have this match simple-prefix-code and redirect to "Normal Code Length
Code" as the added indirection to 'code-length-code' and the undefined
'encoded-code-lengths' doesn't add much.
spotted by thakis@
Change-Id: Icd6b64a47c4e0001e93271d9ae5585be4a6d5906
- add missing '(' in DIV_ROUND_UP
- in 6.2.2, rename 'pos' variable reference to match definition
('position')
spotted by thakis@
Change-Id: Ida3ed281c2c753ebbb0e1eb3c4ed04dadc79ca24
this is always defined by default to 0 since:
v0.6.0-158-g663a6d9d unify the ALTERNATE_CODE flag usage
previously the !defined() check would cause a mismatch between C and
assembly.
Change-Id: Idca0b8e39ca90d63785fd4125aeb7af86c5aae61
add a dependency on libsharpyuv, which is needed after:
0825faa4c img2webp: add -sharp_yuv/-near_lossless
Change-Id: I2471549aa85a4ead6e00d6c459d9774ea4254eaa
this makes the output from img2webp and the ordering in doc/tools.md and
man/img2webp.1 consistent
Change-Id: Ic389aaa29c20128f2b87f231be383094602f125b
Both are global settings. Modifying them at the frame level is left as a
follow up based on need.
Bug: b/272739498
Change-Id: If15256c052f73fe3df56be5e0095e76d9870cc0f
