eden-emu/eden - eden - InfoTonic

History

PavelBARABANOV 815325ccec [loader] add ZBIC (zstd variant) NSO decompression support for Switch 22.0+ (#4482 ) - [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. ------------------- A new NSO compression method was introduced in Switch 22.0.0. This is a customized variant of zstd and is used when NSO flags have bit 7 set. Key characteristics: - ZSTD_MAGICNUMBER is set to 0x4349425A (b'ZBIC') instead of 0xFD2FB528 - ZSTD_LEGACY_SUPPORT is set to 0 - ZSTD_TRACE is set to 1, zstd version used is 1.5.7 (10507) - FSE_readNCount is replaced with a BIC (Binary Interpolative Coding) version which improves compression of entropy tables significantly Source: https://switchbrew.org/wiki/22.0.0 Implementation: - Detect ZBIC segments via NSO flag bit 7 (NsoFlags_UseZbicCompression) and/or ZBIC magic scan in nso.cpp - Fall back to LZ4 when ZBIC is not detected or returns unexpected size - Handle segment 0 alternate offset (0x100 vs 0x108) for both ZBIC and LZ4 References: - Atmosphère loader/strat zstd-zbic integration: `082115187a` - nxdumptool ZBIC segment compression support: `441e5c0904` - STORM_SWITCH ZBIC implementation: `1e09eb82b7` Tested with firmware 23.0.0 and ZBIC-compressed NSOs. Co-authored-by: xbzk <xbzk@eden-emu.dev> Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4482 Reviewed-by: CamilleLaVey <camillelavey99@gmail.com> Reviewed-by: lizzie <lizzie@eden-emu.dev> Reviewed-by: Maufeat <sahyno1996@gmail.com>		1 week ago
..
android	[buffer_cache] Simplify GPU fence synchronization and remove GPU buffer readback (#4477)	1 week ago
audio_core	Revert "[audio] Replace libopus with FFmpeg (#4169)" (#4419)	3 weeks ago
common	[loader] add ZBIC (zstd variant) NSO decompression support for Switch 22.0+ (#4482)	1 week ago
core	[loader] add ZBIC (zstd variant) NSO decompression support for Switch 22.0+ (#4482)	1 week ago
dedicated_room	[common] remove DetachedTasks object usage (#4096)	3 months ago
dynarmic	[dynarmic] fix bad arm codegen on relocations (#4458)	2 weeks ago
frontend_common	[settings] move program_args and debug_knobs back to debugging category and make them pergameable (#4378)	4 weeks ago
hid_core	[hid_core] Code cleanup (#4461)	1 week ago
input_common	[input] Fix mouse drift on Qt/SDL frontends (#4352)	3 weeks ago
network	[cmake] Simplify DetectPlatform and normalize platform names (#4183)	2 months ago
qt_common	[buffer_cache] Simplify GPU fence synchronization and remove GPU buffer readback (#4477)	1 week ago
shader_recompiler	[glsl] fix clang 23 build error for unused function `SetDefinition` (#4389)	2 weeks ago
tests	[common] Switch to boost::unordered_flat containers (#4326)	1 month ago
video_core	[buffer_cache] Simplify GPU fence synchronization and remove GPU buffer readback (#4477)	1 week ago
web_service	[common] remove DetachedTasks object usage (#4096)	3 months ago
yuzu	[frontend] Unify cmdline parsing (#4424)	2 weeks ago
yuzu_cmd	[frontend] Unify cmdline parsing (#4424)	2 weeks ago
yuzu_room_standalone	[cmake] add a `YUZU_STATIC_ROOM` option (#3411)	8 months ago
.clang-format	chore: make yuzu REUSE compliant	4 years ago
CMakeLists.txt	[cmake] Simplify DetectPlatform and normalize platform names (#4183)	2 months ago
dep_hashes.h.in	[cmake, frontend] feat: CPMUtil + dependency viewer (#238)	1 year ago