|author||Vincent Rabaud <email@example.com>||Wed May 31 13:41:43 2023|
|committer||Vincent Rabaud <firstname.lastname@example.org>||Thu Jun 01 08:17:13 2023|
Switch ExtraCost to ints and implement it in SSE. 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
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WebP codec is a library to encode and decode images in WebP format. This package contains the library that can be used in other programs to add WebP support, as well as the command line tools ‘cwebp’ and ‘dwebp’ to compress and decompress images respectively.
See https://developers.google.com/speed/webp for details on the image format.
The latest source tree is available at https://chromium.googlesource.com/webm/libwebp
It is released under the same license as the WebM project. See https://www.webmproject.org/license/software/ or the “COPYING” file for details. An additional intellectual property rights grant can be found in the file PATENTS.
See the building documentation.
The examples/ directory contains tools to encode and decode images and animations, view information about WebP images, and more. See the tools documentation.
See the APIs documentation, and API usage examples in the
Please report all bugs to the issue tracker: https://bugs.chromium.org/p/webp
Patches welcome! See how to contribute.