de6aee46e1
This reverts commit61e5c391d6. When `WEBP_USE_THREAD` is not defined the assignments of *_SSE and their unsuffixed counterparts may race. Assigning *_SSE directly rather than relying on the unsuffixed values avoids a case where the *_SSE variants may refer to the calling function (i.e., AVX2) resulting in infinite recursion. Defining `WEBP_USE_THREAD` is recommended when decode/encode calls can be made from different threads. In the previous commit (2246828b) not all indices of `VP8LPredictorsAdd_SSE[]` were assigned a value, namely 14 and 15. These are used in handling invalid bitstreams to avoid a branch in a hot function. The indices are now assigned to `PredictorAdd0_SSE2` which mimics `VP8LPredictorsSub[]` in lossless_enc_sse2.c. Bug: 435213378, 438295348, 438294044, 438264629, 438294033 Change-Id: I3623717597f0ac6b0d60429adfbb20c611fe6742
WebP Codec
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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.
Building
See the building documentation.
Encoding and Decoding Tools
The examples/ directory contains tools to encode and decode images and animations, view information about WebP images, and more. See the tools documentation.
APIs
See the APIs documentation, and API usage examples in the
examples/ directory.
Bugs
Please report all bugs to the issue tracker. For security reports, select 'Security report' from the Template dropdown.
Patches welcome! See how to contribute.
Discuss
Email: webp-discuss@webmproject.org
Web: https://groups.google.com/a/webmproject.org/group/webp-discuss