10d81e1ef0
Reasoning: The `pool` parameter in the static function `SetBitDepths` (`src/utils/huffman_encode_utils.c:140`) is indexed as an array. Since the function is static and the exact size is not available in the signature, `pool` was annotated as `__bidi_indexable`. This required updating the caller, `GenerateOptimalTree` (also static), where the corresponding argument `tree_pool` is derived from the `tree` parameter. Consequently, both the `tree` parameter and the local variable `tree_pool` in `GenerateOptimalTree` (`src/utils/huffman_encode_utils.c:170`) were also annotated as `__bidi_indexable`. Finally, the call to `GenerateOptimalTree` from the ABI-visible function `VP8LCreateHuffmanTree` (`src/utils/huffman_encode_utils.c:417`) required adapting the `huff_tree` pointer. Tracing the allocation in `src/enc/vp8l_enc.c:473` revealed that `huff_tree` is allocated with enough space for `3 * max_num_symbols`. Therefore, `__unsafe_forge_bidi_indexable` was used to cast `huff_tree` to `__bidi_indexable` with the calculated bounds (`3 * num_symbols`). Bug: 432511821 Change-Id: I53c6965c3fd708256241a225ec9223085a1ec2d4
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