mirror of
https://github.com/webmproject/libwebp.git
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202 lines
7.6 KiB
C++
202 lines
7.6 KiB
C++
// Copyright 2018-2024 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////////
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#ifndef WEBP_TESTS_FUZZER_FUZZ_UTILS_H_
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#define WEBP_TESTS_FUZZER_FUZZ_UTILS_H_
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#include <cstddef>
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#include <cstdint>
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#include <cstdlib>
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#include <optional>
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#include <string>
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#include <string_view>
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#include <utility>
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#include <vector>
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#include "./img_alpha.h"
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#include "./img_grid.h"
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#include "./img_peak.h"
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#include "src/dsp/cpu.h"
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#include "src/webp/encode.h"
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#include "fuzztest/fuzztest.h"
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namespace fuzz_utils {
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//------------------------------------------------------------------------------
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// Arbitrary limits to prevent OOM, timeout, or slow execution.
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// The decoded image size, and for animations additionally the canvas size.
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// Enabling some sanitizers slow down runtime significantly.
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// Use a very low threshold in this case to avoid timeouts.
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#if defined(__SANITIZE_ADDRESS__) // GCC
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static const size_t kFuzzPxLimit = 1024 * 1024 / 10;
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#elif !defined(__has_feature) // Clang
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static const size_t kFuzzPxLimit = 1024 * 1024;
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#elif __has_feature(address_sanitizer) || __has_feature(memory_sanitizer)
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static const size_t kFuzzPxLimit = 1024 * 1024 / 18;
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#else
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static const size_t kFuzzPxLimit = 1024 * 1024;
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#endif
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// Demuxed or decoded animation frames.
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static const int kFuzzFrameLimit = 3;
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// Reads and sums (up to) 128 spread-out bytes.
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static WEBP_INLINE uint8_t FuzzHash(const uint8_t* const data, size_t size) {
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uint8_t value = 0;
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size_t incr = size / 128;
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if (!incr) incr = 1;
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for (size_t i = 0; i < size; i += incr) value += data[i];
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return value;
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}
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#ifdef __cplusplus
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extern "C" VP8CPUInfo VP8GetCPUInfo;
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#else
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extern VP8CPUInfo VP8GetCPUInfo;
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#endif
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//------------------------------------------------------------------------------
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constexpr const uint8_t* kImagesData[] = {kImgAlphaData, kImgGridData,
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kImgPeakData};
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constexpr size_t kNumSourceImages =
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sizeof(kImagesData) / sizeof(kImagesData[0]);
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WebPPicture GetSourcePicture(int image_index, bool use_argb);
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static inline auto ArbitraryWebPConfig() {
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return fuzztest::Map(
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[](int lossless, int quality, int method, int image_hint, int segments,
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int sns_strength, int filter_strength, int filter_sharpness,
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int filter_type, int autofilter, int alpha_compression,
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int alpha_filtering, int alpha_quality, int pass, int preprocessing,
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int partitions, int partition_limit, int emulate_jpeg_size,
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int thread_level, int low_memory, int near_lossless, int exact,
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int use_delta_palette, int use_sharp_yuv) -> WebPConfig {
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WebPConfig config;
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if (!WebPConfigInit(&config)) abort();
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config.lossless = lossless;
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config.quality = quality;
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config.method = method;
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config.image_hint = (WebPImageHint)image_hint;
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config.segments = segments;
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config.sns_strength = sns_strength;
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config.filter_strength = filter_strength;
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config.filter_sharpness = filter_sharpness;
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config.filter_type = filter_type;
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config.autofilter = autofilter;
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config.alpha_compression = alpha_compression;
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config.alpha_filtering = alpha_filtering;
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config.alpha_quality = alpha_quality;
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config.pass = pass;
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config.show_compressed = 1;
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config.preprocessing = preprocessing;
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config.partitions = partitions;
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config.partition_limit = 10 * partition_limit;
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config.emulate_jpeg_size = emulate_jpeg_size;
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config.thread_level = thread_level;
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config.low_memory = low_memory;
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config.near_lossless = 20 * near_lossless;
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config.exact = exact;
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config.use_delta_palette = use_delta_palette;
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config.use_sharp_yuv = use_sharp_yuv;
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if (!WebPValidateConfig(&config)) abort();
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return config;
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},
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/*lossless=*/fuzztest::InRange<int>(0, 1),
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/*quality=*/fuzztest::InRange<int>(0, 100),
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/*method=*/fuzztest::InRange<int>(0, 6),
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/*image_hint=*/fuzztest::InRange<int>(0, WEBP_HINT_LAST - 1),
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/*segments=*/fuzztest::InRange<int>(1, 4),
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/*sns_strength=*/fuzztest::InRange<int>(0, 100),
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/*filter_strength=*/fuzztest::InRange<int>(0, 100),
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/*filter_sharpness=*/fuzztest::InRange<int>(0, 7),
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/*filter_type=*/fuzztest::InRange<int>(0, 1),
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/*autofilter=*/fuzztest::InRange<int>(0, 1),
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/*alpha_compression=*/fuzztest::InRange<int>(0, 1),
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/*alpha_filtering=*/fuzztest::InRange<int>(0, 2),
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/*alpha_quality=*/fuzztest::InRange<int>(0, 100),
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/*pass=*/fuzztest::InRange<int>(1, 10),
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/*preprocessing=*/fuzztest::InRange<int>(0, 2),
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/*partitions=*/fuzztest::InRange<int>(0, 3),
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/*partition_limit=*/fuzztest::InRange<int>(0, 10),
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/*emulate_jpeg_size=*/fuzztest::InRange<int>(0, 1),
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/*thread_level=*/fuzztest::InRange<int>(0, 1),
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/*low_memory=*/fuzztest::InRange<int>(0, 1),
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/*near_lossless=*/fuzztest::InRange<int>(0, 5),
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/*exact=*/fuzztest::InRange<int>(0, 1),
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/*use_delta_palette=*/fuzztest::InRange<int>(0, 1),
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/*use_sharp_yuv=*/fuzztest::InRange<int>(0, 1));
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}
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struct CropOrScaleParams {
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bool alter_input;
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bool crop_or_scale;
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int width_ratio;
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int height_ratio;
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int left_ratio;
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int top_ratio;
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};
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static inline auto ArbitraryCropOrScaleParams() {
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return fuzztest::Map(
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[](const std::optional<std::pair<int, int>>& width_height_ratio,
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const std::optional<std::pair<int, int>>& left_top_ratio)
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-> CropOrScaleParams {
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CropOrScaleParams params;
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params.alter_input = width_height_ratio.has_value();
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if (params.alter_input) {
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params.width_ratio = width_height_ratio->first;
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params.height_ratio = width_height_ratio->second;
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params.crop_or_scale = left_top_ratio.has_value();
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if (params.crop_or_scale) {
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params.left_ratio = left_top_ratio->first;
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params.top_ratio = left_top_ratio->second;
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}
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}
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return params;
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},
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fuzztest::OptionalOf(
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fuzztest::PairOf(fuzztest::InRange(1, 8), fuzztest::InRange(1, 8))),
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fuzztest::OptionalOf(
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fuzztest::PairOf(fuzztest::InRange(1, 8), fuzztest::InRange(1, 8))));
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}
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// Crops or scales a picture according to the given params.
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int CropOrScale(WebPPicture* pic, const CropOrScaleParams& params);
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// Imposes a level of optimization among one of the kMaxOptimizationIndex+1
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// possible values: OnlyC, ForceSlowSSSE3, NoSSE41, NoAVX, default.
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static constexpr uint32_t kMaxOptimizationIndex = 4;
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void SetOptimization(VP8CPUInfo default_VP8GetCPUInfo, uint32_t index);
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//------------------------------------------------------------------------------
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// See https://developers.google.com/speed/webp/docs/riff_container.
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static constexpr size_t kMaxWebPFileSize = (1ull << 32) - 2; // 4 GiB - 2
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std::vector<std::string> GetDictionaryFromFiles(
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const std::vector<std::string_view>& file_paths);
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// Checks whether the binary blob containing a JPEG or WebP is too big for the
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// fuzzer.
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bool IsImageTooBig(const uint8_t* data, size_t size);
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} // namespace fuzz_utils
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#endif // WEBP_TESTS_FUZZER_FUZZ_UTILS_H_
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