58968bd127
[core] Support block-compressed NSZ and XCZ ( #4552 )
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- [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.
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- 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 >
2026-10-26 17:23:18 +01:00
79aa81015f
zstd: Use ZSTD_getFrameContentSize instead of ZSTD_getDecompressedSize
2023-03-23 22:16:20 -04:00
2b87305d31
general: Convert source file copyright comments over to SPDX
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This formats all copyright comments according to SPDX formatting guidelines.
Additionally, this resolves the remaining GPLv2 only licensed files by relicensing them to GPLv2.0-or-later.
2022-04-23 05:55:32 -04:00
e6e865f3d3
zstd_compression: Make use of std::span
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Allows for the incoming data stream to be non-allocating.
2021-05-24 15:01:04 -04:00
0977ef7d7f
common/compression: Roll back std::span changes
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Seems like all compilers don't support std::span yet.
2020-08-15 17:17:56 -04:00
84e6115423
zstd_compression: Make use of std::span in interfaces
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Allows condensing the data and size parameters into a single argument.
2020-07-25 03:11:56 -04:00
0f099b0fd3
common/zstd_compression: Remove #pragma once directive from source file
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Introduced in 2d755221e8
2019-05-04 01:54:29 -04:00
ef49a1b96e
common/zstd_compression: simplify decompression interface
2019-03-29 18:22:08 +01:00
2d755221e8
common/zstd_compression: Add Zstandard wrapper
2019-03-29 18:22:08 +01:00
PavelBARABANOV
Morph
Lioncash
unknown