Move this to the top-level of the "Details" section as prefix codes are
discussed in both "Decoding and Building the Prefix Codes" and "Decoding
of Meta Prefix Codes"
Bug: webp:611
Change-Id: Ide2dfedf081d6c94122ac16ecded968ed760f90c
in the Transformations section describing decoding of the transform
data followed by the image data. The section numbers were adjusted by 1
in:
337cf69f webp-lossless-bitstream-spec: mv Nomenclature after Intro
Bug: webp:611
Change-Id: I4eede0d068fabdef51a140a0268436ab6629e8bb
Give some examples of repetition and binary value notation to limit the
need to follow the ABNF reference.
Bug: webp:611
Change-Id: I5b5a7632f011e1523b4a528653fe3630afba3e3e
in 6.2.3 Decoding Entropy-Coded Image Data.
The copying of distance code pixels cause some confusion during the
AUTH48 portion of the RFC review process.
Bug: webp:611
Change-Id: I78f547ae10c95f180355a4c93ec6d48acdc09141
Mostly grammatical and addition/subtraction of commas from the AUTH48
portion of the RFC review process.
The serial comma changes are based on the Chicago Manual of Style
(CMOS), 17th edition.
Bug: webp:611
Change-Id: I5ae2d1cc0196009dbf3a4c2195cc73c2ef809b49
preprocessing bits are informative, not the filtering bits.
since:
391f9db9 Ordering of description of bits in container spec
Change-Id: I1c0da963074ce9cf4d33a13b4b36c9421b3e3b9d
Mostly grammatical and addition/subtraction of commas from the AUTH48
portion of the RFC review process.
The serial comma changes are based on the Chicago Manual of Style
(CMOS), 17th edition.
Change-Id: Ic75abf2e53e09c8a849e28e9c40e16c127515287
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
using the defaults present in 0.6.13 and setting
--first-comment-is-literal to avoid reflowing the copyright block and
--max-subgroups-hwrap 3 (default is 2) to avoid making some short set()
statements multi-line.
Change-Id: I3d90c025b5b2bb353046f4da19b8e442a044b902
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
