fde90a49e4
Reasoning: The `histogram` parameter in `GenerateOptimalTree` (src/utils/huffman_encode_utils.c:170) is used as an array indexed up to `histogram_size`. It was annotated with `__counted_by(histogram_size)` to fix bounds-safety errors. This required annotating the caller `VP8LCreateHuffmanTree` (src/utils/huffman_encode_utils.c:411). However, the size of `histogram` in `VP8LCreateHuffmanTree` depends on another parameter (`huff_code->num_symbols`), preventing direct annotation in the signature. Instead, a local `__bidi_indexable` pointer (`bounded_histogram`) was forged inside `VP8LCreateHuffmanTree` using `__unsafe_forge_bidi_indexable` with the correct size and passed to `GenerateOptimalTree`. This also required annotating parameters `good_for_rle` and `counts` in `OptimizeHuffmanForRle` (src/utils/huffman_encode_utils.c:37) and forging a bounded pointer for `buf_rle` (`bounded_buf_rle`) in `VP8LCreateHuffmanTree` to pass to `OptimizeHuffmanForRle`. Bug: 432511821 Change-Id: I5905ff93f4cc0a9ff03c5786b5ac20c6bfa965ff
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