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https://git.eden-emu.dev/eden-emu/eden.git
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PavelBARABANOV
58968bd127
- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions). - [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md). - [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability. ------------------- - Add NCZBLOCK (nsz -B / .xcz) reader: each read decodes only the covered blocks and re-encrypts CTR sections, no disk output. - Allow installing solid .nsz to NAND via DecompressNCZForInstall (lazy, incremental decode with frontier, O(n) instead of O(n^2)). - Accept BKTR updates with thousands of sections (MaxSectionCount = 0x10000). - Wire .nsz/.xcz into loader, registered cache, scanner, and NAND install (content_manager.h), and reject solid NCZ from the game list. - Bump the pinned zstd to 33618c8 in cpmfile.json, which includes the upstream AArch64 revert ([33618c89](https://github.com/facebook/zstd/commit/33618c89e511637f8a6ef955b3501766d71feb53)) for a ZSTD_decodeSequence branch optimization that could corrupt data on ARM64; without it, solid NCZ decoding on Android fails with "Data corruption detected". NCZ format and CTR counter semantics follow the reference nsz tool and its Rust port: - https://github.com/nicoboss/nsz (Decompressor.py, BlockDecompressorReader.py) - https://docs.rs/nsz-rs/0.3.0/src/nsz_rs/decompress.rs.html The last-block edge case (decompressed size is an exact multiple of block size) is handled as described in https://github.com/nicoboss/nsz/issues/210 Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4552 Reviewed-by: CamilleLaVey <camillelavey99@gmail.com> Reviewed-by: Shinmegumi <shinmegumi@eden-emu.dev>
59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
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// SPDX-License-Identifier: GPL-3.0-or-later
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// SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <algorithm>
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#include <zstd.h>
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#include "common/zstd_compression.h"
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namespace Common::Compression {
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std::vector<u8> CompressDataZSTD(const u8* source, std::size_t source_size, s32 compression_level) {
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compression_level = std::clamp(compression_level, 1, ZSTD_maxCLevel());
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const std::size_t max_compressed_size = ZSTD_compressBound(source_size);
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std::vector<u8> compressed(max_compressed_size);
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const std::size_t compressed_size =
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ZSTD_compress(compressed.data(), compressed.size(), source, source_size, compression_level);
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if (ZSTD_isError(compressed_size)) {
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// Compression failed
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return {};
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}
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compressed.resize(compressed_size);
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return compressed;
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}
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std::vector<u8> CompressDataZSTDDefault(const u8* source, std::size_t source_size) {
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return CompressDataZSTD(source, source_size, ZSTD_CLEVEL_DEFAULT);
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}
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std::vector<u8> DecompressDataZSTD(std::span<const u8> compressed) {
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const std::size_t decompressed_size =
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ZSTD_getFrameContentSize(compressed.data(), compressed.size());
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std::vector<u8> decompressed(decompressed_size);
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const std::size_t uncompressed_result_size = ZSTD_decompress(
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decompressed.data(), decompressed.size(), compressed.data(), compressed.size());
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if (decompressed_size != uncompressed_result_size || ZSTD_isError(uncompressed_result_size)) {
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// Decompression failed
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return {};
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}
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return decompressed;
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}
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std::size_t DecompressDataZSTD(std::span<const u8> compressed, std::span<u8> output) {
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const std::size_t result =
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ZSTD_decompress(output.data(), output.size(), compressed.data(), compressed.size());
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return ZSTD_isError(result) ? 0 : result;
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}
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} // namespace Common::Compression
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